Bash — per-model detail

Every failing sample below is the real generated shell script, with the stdout/exit-code mismatch that rejected it. Trial 0 runs at temperature 0, trials 1 and 2 at 0.7 — so a task passing 1/3 is a sampling-luck pass, not a reliable one. Models are ordered best first. Other technologies: C · Python · Bash · research · how to reproduce.

Reproduce this benchmark

Setup and model serving are on the models index — including a script-free version using nothing but curl and a compiler; with a server running, this is the exact command that produced the samples below:

# Bash suite (8 easy + 3 hard tasks, 3 trials each)
python scripts/eval_bash.py --target <model> --set all --trials 3 \
    --dump-failures results/failures
python scripts/eval_bash.py --target <model> --set brutal --trials 3 \
    --dump-failures results/failures --json > results/<model>-brutal-bash.json
# stdout must match exactly and the exit code must be 0.

qwen3.8-flash-next 125B 91% overall↑ top

Served via llama.cpp Vulkan · 27.8 tok/s · 28.8 GB RAM · coding total 115/126

Bash — 20/24 (1.3 min / 1.6k tok)

extract_urls — 0/3 passed
prompt sent to the model
Implement in bash: `extract_urls`. Reads stdin, prints every http:// or https:// URL found, one per line, in order of appearance. Nothing else.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]]+'
}
trial 1 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]]+'
}
trial 2 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]]+'
}
rotate — 2/3 passed
prompt sent to the model
Implement in bash: `rotate <file>`. Rotates logs one level: <file>.1 becomes <file>.2, then <file> becomes <file>.1. If <file>.1 does not exist, just rename <file> to <file>.1.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — timeout
rotate() {
    local file="$1"
    if [ ! -f "${file}.1" ]; then
        mv "$file" "${file}.1"
    else
        local i=1
        while [ -f "${file}.${i}" ]; do
            mv "${file}.${i}" "${file}.$((i + 1))"
            i=$((i + 1))
        done
        mv "$file" "${file}.1"
    fi
}

Bash (hard) — 6/9 (1.7 min / 2.7k tok)

find_dupes — 0/3 passed
prompt sent to the model
Implement in bash: `find_dupes <dir>`. Finds groups of regular files under <dir> (recursive) with identical content (compare by MD5). Prints one group per line: space-separated paths, sorted, only groups of 2+ files. Groups sorted by first path. Must work on macOS (BSD userland: no GNU find -printf, no md5sum — use md5 -r).
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL got:
find_dupes() {
  local dir="$1"
  local tmpfile=$(mktemp)
  local tmpout=$(mktemp)

  # Find all regular files, compute MD5, store "md5 path"
  find "$dir" -type f -exec md5 -r {} \; 2>/dev/null | while IFS= read -r line; do
    # md5 -r outputs: <hash> <filename>
    # The filename may contain spaces, so we need to be careful
    # Format: first field is hash, rest is filename
    local hash="${line%% *}"
    local filepath="${line#* }"
    printf '%s\t%s\n' "$hash" "$filepath"
  done > "$tmpfile"

  # Sort by hash, then by path
  sort -t$'\t' -k1,1 -k2,2 "$tmpfile" > "$tmpout"

  # Group by hash and print groups with 2+ files
  local current_hash=""
  local current_paths=()

  while IFS=$'\t' read -r hash filepath; do
    if [[ "$hash" != "$current_hash" ]]; then
      # Print previous group if it had 2+ files
      if [[ ${#current_paths[@]} -ge 2 ]]; then
        # Sort paths within the group
        local sorted_paths
        sorted_paths=$(printf '%s\n' "${current_paths[@]}" | sort)
        # Join with spaces
        local joined
        joined=$(echo "$sorted_paths" | tr '\n' ' ')
        # Trim trailing space
        joined="${joined% }"
        echo "$joined"
      fi
      current_hash="$hash"
      current_paths=("$filepath")
    else
      current_paths+=("$filepath")
    fi
  done < "$tmpout"

  # Print last group
  if [[ ${#current_paths[@]} -ge 2 ]]; then
    local sorted_paths
    sorted_paths=$(printf '%s\n' "${current_paths[@]}" | sort)
    local joined
    joined=$(echo "$sorted_paths" | tr '\n' ' ')
    joined="${joined% }"
    echo "$joined"
  fi

  rm -f "$tmpfile" "$tmpout"
}
trial 1 (temp 0.7) — fail — FAIL got:
find_dupes() {
    local dir="$1"
    local tmpfile=$(mktemp)
    local tmpout=$(mktemp)

    # Find all regular files, compute MD5, store "md5 path"
    find "$dir" -type f -exec md5 -r {} \; 2>/dev/null | while IFS= read -r line; do
        # md5 -r outputs: <hash> <filename>
        # The hash is the first field, the rest is the filename
        hash=$(echo "$line" | awk '{print $1}')
        # Get the filename by removing the first field and leading space
        filepath=$(echo "$line" | sed 's/^[^ ]* //')
        echo "$hash $filepath"
    done > "$tmpfile"

    # Sort by hash, then by filepath
    sort -k1,1 -k2 "$tmpfile" > "$tmpout"

    # Group by hash and print groups with 2+ files
    local current_hash=""
    local current_group=()

    while IFS= read -r line; do
        hash=$(echo "$line" | awk '{print $1}')
        filepath=$(echo "$line" | sed 's/^[^ ]* //')

        if [[ "$hash" == "$current_hash" ]]; then
            current_group+=("$filepath")
        else
            if [[ ${#current_group[@]} -ge 2 ]]; then
                # Sort the group paths
                printf '%s\n' "${current_group[@]}" | sort | tr '\n' ' ' | sed 's/ $//'
                echo
            fi
            current_hash="$hash"
            current_group=("$filepath")
        fi
    done < "$tmpout"

    # Print the last group
    if [[ ${#current_group[@]} -ge 2 ]]; then
        printf '%s\n' "${current_group[@]}" | sort | tr '\n' ' ' | sed 's/ $//'
        echo
    fi

    rm -f "$tmpfile" "$tmpout"
}
trial 2 (temp 0.7) — fail — FAIL got:
find_dupes() {
    local dir="$1"
    local tmpfile=$(mktemp)
    
    # Find all regular files, compute MD5, store as "md5 path"
    # Using md5 -r on macOS which outputs "md5 filename"
    find "$dir" -type f -exec md5 -r {} \; 2>/dev/null | sort > "$tmpfile"
    
    # Group by MD5, collect paths, filter groups with 2+ files
    # Then sort groups by first path
    
    local current_md5=""
    local current_paths=()
    local groups=()
    
    while IFS= read -r line; do
        # Extract md5 (first field) and path (rest of line)
        local md5="${line%% *}"
        local path="${line#* }"
        
        if [[ "$md5" == "$current_md5" ]]; then
            current_paths+=("$path")
        else
            # Process previous group
            if [[ ${#current_paths[@]} -ge 2 ]]; then
                # Sort paths within group
                local sorted_paths
                sorted_paths=$(printf '%s\n' "${current_paths[@]}" | sort)
                local group_str
                group_str=$(echo "$sorted_paths" | tr '\n' ' ')
                # Trim trailing space
                group_str="${group_str% }"
                groups+=("$group_str")
            fi
            # Start new group
            current_md5="$md5"
            current_paths=("$path")
        fi
    done < "$tmpfile"
    
    # Process last group
    if [[ ${#current_paths[@]} -ge 2 ]]; then
        local sorted_paths
        sorted_paths=$(printf '%s\n' "${current_paths[@]}" | sort)
        local group_str
        group_str=$(echo "$sorted_paths" | tr '\n' ' ')
        group_str="${group_str% }"
        groups+=("$group_str")
    fi
    
    rm -f "$tmpfile"
    
    # Sort groups by first path (which is the first word in each group string)
    if [[ ${#groups[@]} -gt 0 ]]; then
        printf '%s\n' "${groups[@]}" | sort
    fi
}

gpt-oss-120b 87% overall↑ top

Served via llama.cpp Vulkan · 51.4 tok/s · 0.3 GB RAM · coding total 109/126

Bash — 19/24 (3.3 min / 9.8k tok)

count_matches — 2/3 passed
prompt sent to the model
Implement in bash: `count_matches <pattern> <file>`. Prints the number of lines in <file> matching <pattern> (fixed string). Prints 0 when nothing matches.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL count zzz
count_matches() {
    local pattern=$1
    local file=$2

    # Ensure both arguments are provided
    if [[ -z $pattern || -z $file ]]; then
        echo "Usage: count_matches <pattern> <file>" >&2
        return 2
    fi

    # Use grep with fixed-string matching; -c prints the count (0 if none)
    grep -F -c -- "$pattern" "$file" 2>/dev/null || echo 0
}
extract_urls — 2/3 passed
prompt sent to the model
Implement in bash: `extract_urls`. Reads stdin, prints every http:// or https:// URL found, one per line, in order of appearance. Nothing else.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL got:
extract_urls() {
    local regex='https\?://[^[:space:]<>"]+'
    if (( $# )); then
        grep -oE "$regex" "$@"
    else
        grep -oE "$regex"
    fi
}
json_get — 0/3 passed
prompt sent to the model
Implement in bash: `json_get <key>`. Reads a flat JSON object on stdin and prints the string value of top-level <key>. python3 is available; jq is not.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
json_get() {
    local key=$1
    python3 - "$key" <<'PY'
import sys, json
key = sys.argv[1]
obj = json.load(sys.stdin)
val = obj.get(key)
if isinstance(val, str):
    print(val)
else:
    print(json.dumps(val))
PY
}
trial 1 (temp 0.7) — fail — json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
json_get() {
    local key=$1
    python3 - "$key" <<'PY'
import sys, json
key = sys.argv[1]
data = json.load(sys.stdin)
value = data.get(key)

if isinstance(value, str):
    sys.stdout.write(value)
elif value is None:
    sys.stdout.write('null')
else:
    sys.stdout.write(json.dumps(value))
PY
}
trial 2 (temp 0.7) — fail — json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
json_get() {
    local key=$1
    python3 - "$key" <<'PY'
import sys, json
key = sys.argv[1]
data = json.load(sys.stdin)
value = data.get(key)

if isinstance(value, str):
    sys.stdout.write(value)
elif value is None:
    sys.stdout.write('null')
else:
    sys.stdout.write(json.dumps(value))
PY
}

Bash (hard) — 6/9 (3.1 min / 9.3k tok)

find_dupes — 0/3 passed
prompt sent to the model
Implement in bash: `find_dupes <dir>`. Finds groups of regular files under <dir> (recursive) with identical content (compare by MD5). Prints one group per line: space-separated paths, sorted, only groups of 2+ files. Groups sorted by first path. Must work on macOS (BSD userland: no GNU find -printf, no md5sum — use md5 -r).
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — solution.sh: line 10: md5: command not found
find_dupes() {
    local dir=$1
    if [[ -z $dir ]]; then
        echo "Usage: find_dupes <dir>" >&2
        return 1
    fi

    find "$dir" -type f -print0 |
    while IFS= read -r -d '' file; do
        md5 -r "$file"
    done |
    awk '
    {
        hash=$1
        $1=""
        sub(/^ /,"")
        path=$0
        print hash "\t" path
    }' |
    sort -k1,1 -k2,2 |
    awk -F'\t' '
    {
        if ($1 != prev_hash) {
            if (NR>1 && count>1) {
                for (i=1;i<=count;i++) {
                    printf "%s%s", group[i], (i==count?ORS:" ")
                }
            }
            prev_hash=$1
            count=0
        }
        group[++count]=$2
    }
    END {
        if (count>1) {
            for (i=1;i<=count;i++) {
                printf "%s%s", group[i], (i==count?ORS:" ")
            }
        }
    }' |
    sort -k1,1
}
trial 1 (temp 0.7) — fail — solution.sh: line 10: md5: command not found
find_dupes() {
    local dir=$1
    [[ -d $dir ]] || return 1

    # hash => newline‑separated list of files
    declare -A hash_files

    # Gather files and their MD5 hashes
    while IFS= read -r -d '' file; do
        # macOS md5 -r prints: "<hash> <filename>"
        local hash
        hash=$(md5 -r "$file" | awk '{print $1}')
        if [[ -z ${hash_files[$hash]} ]]; then
            hash_files[$hash]=$file
        else
            hash_files[$hash]+=$'\n'"$file"
        fi
    done < <(find "$dir" -type f -print0)

    # Build groups of duplicates
    local groups=()
    for hash in "${!hash_files[@]}"; do
        # Split the newline‑separated list into an array
        mapfile -t files <<< "${hash_files[$hash]}"
        (( ${#files[@]} < 2 )) && continue   # need at least two files

        # Sort the paths within the group
        IFS=$'\n' read -r -d '' -a sorted <<< "$(printf '%s\n' "${files[@]}" | sort)$'\0'"

        # Join the sorted paths with spaces and store the group
        groups+=("$(printf '%s ' "${sorted[@]}" | sed 's/ $//')")
    done

    # Output groups sorted by their first path
    printf '%s\n' "${groups[@]}" | sort -k1,1
}
trial 2 (temp 0.7) — fail — solution.sh: line 10: md5: command not found
find_dupes() {
    local dir=$1
    [[ -d $dir ]] || return 1

    declare -A hfiles

    # Gather files and their MD5 hashes
    while IFS= read -r -d '' f; do
        local h
        h=$(md5 -r "$f" | awk '{print $1}')
        if [[ -z ${hfiles[$h]} ]]; then
            hfiles[$h]=$f
        else
            hfiles[$h]+=$'\n'"$f"
        fi
    done < <(find "$dir" -type f -print0)

    local groups=()

    # Build groups of duplicates
    for h in "${!hfiles[@]}"; do
        readarray -t files <<< "${hfiles[$h]}"
        (( ${#files[@]} < 2 )) && continue
        local line
        line=$(printf '%s\n' "${files[@]}" | sort | tr '\n' ' ' | sed 's/ $//')
        groups+=("$line")
    done

    # Output groups sorted by their first path
    printf '%s\n' "${groups[@]}" | sort -k1,1
}

laguna-s 2.1 117B 85% overall↑ top

Served via llama.cpp Vulkan · 33.6 tok/s · 0.3 GB RAM · coding total 107/126

Bash — 18/24 (1.1 min / 1.9k tok)

count_matches — 0/3 passed
prompt sent to the model
Implement in bash: `count_matches <pattern> <file>`. Prints the number of lines in <file> matching <pattern> (fixed string). Prints 0 when nothing matches.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL count zzz
count_matches() {
    local pattern="$1"
    local file="$2"
    grep -F -c -- "$pattern" "$file" 2>/dev/null || echo 0
}
trial 1 (temp 0.7) — fail — FAIL count zzz
count_matches() {
    grep -F -c -- "$1" "$2" 2>/dev/null || echo 0
}
trial 2 (temp 0.7) — fail — FAIL count zzz
count_matches() {
    grep -F -c -- "$1" "$2" 2>/dev/null || echo 0
}
extract_urls — 0/3 passed
prompt sent to the model
Implement in bash: `extract_urls`. Reads stdin, prints every http:// or https:// URL found, one per line, in order of appearance. Nothing else.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]]+'
}
trial 1 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]]+'
}
trial 2 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]]+'
}

Bash (hard) — 2/9 (0.9 min / 1.7k tok)

find_dupes — 0/3 passed
prompt sent to the model
Implement in bash: `find_dupes <dir>`. Finds groups of regular files under <dir> (recursive) with identical content (compare by MD5). Prints one group per line: space-separated paths, sorted, only groups of 2+ files. Groups sorted by first path. Must work on macOS (BSD userland: no GNU find -printf, no md5sum — use md5 -r).
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL got:
find_dupes() {
    local dir="$1"
    find "$dir" -type f -exec md5 -r {} + 2>/dev/null |
    awk '{
        hash = $1
        $1 = ""
        sub(/^ /, "")
        paths[hash] = paths[hash] " " $0
        count[hash]++
    }
    END {
        for (h in paths) {
            if (count[h] > 1) {
                n = split(paths[h], arr, " ")
                # Re-sort the paths
                for (i = 2; i <= n; i++) {
                    key = arr[i]
                    j = i - 1
                    while (j >= 1 && arr[j] > key) {
                        arr[j+1] = arr[j]
                        j--
                    }
                    arr[j+1] = key
                }
                line = ""
                for (i = 1; i <= n; i++) {
                    line = line " " arr[i]
                }
                sub(/^ /, "", line)
                print line
            }
        }
    }' |
    sort
}
trial 1 (temp 0.7) — fail — FAIL got:
find_dupes() {
    local dir="$1"
    find "$dir" -type f -exec md5 -r {} + 2>/dev/null |
    awk '{
        hash = $1
        $1 = ""
        sub(/^ /, "")
        paths[hash] = paths[hash] " " $0
        count[hash]++
    }
    END {
        for (h in paths) {
            if (count[h] > 1) {
                n = split(paths[h], arr, " ")
                # Re-sort the paths
                for (i = 2; i <= n; i++) {
                    key = arr[i]
                    j = i - 1
                    while (j >= 1 && arr[j] > key) {
                        arr[j+1] = arr[j]
                        j--
                    }
                    arr[j+1] = key
                }
                line = ""
                for (i = 1; i <= n; i++) {
                    line = line " " arr[i]
                }
                sub(/^ /, "", line)
                print line
            }
        }
    }' |
    sort
}
trial 2 (temp 0.7) — fail — FAIL got:
find_dupes() {
    local dir="$1"
    find "$dir" -type f -exec md5 -r {} + 2>/dev/null |
    awk '{
        hash = $1
        $1 = ""
        sub(/^ /, "")
        paths[hash] = paths[hash] " " $0
        count[hash]++
    }
    END {
        for (h in paths) {
            if (count[h] > 1) {
                n = split(paths[h], arr, " ")
                # Re-sort the paths
                for (i = 2; i <= n; i++) {
                    key = arr[i]
                    j = i - 1
                    while (j >= 1 && arr[j] > key) {
                        arr[j+1] = arr[j]
                        j--
                    }
                    arr[j+1] = key
                }
                line = ""
                for (i = 1; i <= n; i++) {
                    line = line " " arr[i]
                }
                sub(/^ /, "", line)
                print line
            }
        }
    }' |
    sort
}
top_errors — 2/3 passed
prompt sent to the model
Implement in bash: `top_errors <logfile> <n>`. Prints the n most frequent ERROR signatures in <logfile>. A signature is the text after 'ERROR: ' with every run of digits replaced by '#'. Output one per line as '<count> <signature>', sorted by count descending, then signature ascending. Print nothing if there are no ERROR lines.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 1 (temp 0.7) — fail — 3 disk
top_errors() {
    local logfile="$1"
    local n="$2"
    grep -o 'ERROR: .*' "$logfile" 2>/dev/null | \
        sed 's/ERROR: //' | \
        sed 's/[0-9]\+/#/g' | \
        sort | \
        uniq -c | \
        sort -k1,1nr -k2,2 | \
        head -n "$n" | \
        awk '{print $1 " " $2}'
}
backup_rotate — 0/3 passed
prompt sent to the model
Implement in bash: `backup_rotate <dir> <keep>`. In <dir>, deletes all but the <keep> newest files matching backup-*.tar.gz (newest = lexicographically greatest names). Prints each deleted file's name (not path), one per line, oldest first. Deletes nothing if there are <= <keep> backups (prints nothing).
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — backup-20260103-120000.tar.gz
backup_rotate() {
    local dir="$1"
    local keep="$2"
    local files=()
    while IFS= read -r -d '' f; do
        files+=("$f")
    done < <(find "$dir" -maxdepth 1 -type f -name 'backup-*.tar.gz' -print0 | sort -rz)
    local count=${#files[@]}
    if (( count <= keep )); then
        return 0
    fi
    local start=$((count - keep))
    for ((i = 0; i < start; i++)); do
        local basename
        basename=$(basename "${files[$i]}")
        rm -f "${files[$i]}"
        printf '%s\n' "$basename"
    done
}
trial 1 (temp 0.7) — fail — backup-20260103-120000.tar.gz
backup_rotate() {
    local dir="$1"
    local keep="$2"
    local files=()
    while IFS= read -r -d '' f; do
        files+=("$f")
    done < <(find "$dir" -maxdepth 1 -type f -name 'backup-*.tar.gz' -print0 | sort -rz)
    local count=${#files[@]}
    if (( count <= keep )); then
        return 0
    fi
    local to_delete=$((count - keep))
    local i
    for ((i = 0; i < to_delete; i++)); do
        local file="${files[i]}"
        rm -f "$file"
        basename "$file"
    done
}
trial 2 (temp 0.7) — fail — backup-20260103-120000.tar.gz
backup_rotate() {
    local dir="$1"
    local keep="$2"
    local files=()
    while IFS= read -r -d '' f; do
        files+=("$f")
    done < <(find "$dir" -maxdepth 1 -type f -name 'backup-*.tar.gz' -print0 | sort -rz)
    local count=${#files[@]}
    if (( count <= keep )); then
        return 0
    fi
    local start=$((count - keep))
    for ((i = 0; i < start; i++)); do
        local basename
        basename=$(basename "${files[$i]}")
        rm -f "${files[$i]}"
        printf '%s\n' "$basename"
    done
}

gemma-4-26b 83% overall↑ top

Served via llama.cpp Vulkan · 47.1 tok/s · 0.5 GB RAM · coding total 105/126

Bash — 15/24 (0.6 min / 1.4k tok)

count_matches — 0/3 passed
prompt sent to the model
Implement in bash: `count_matches <pattern> <file>`. Prints the number of lines in <file> matching <pattern> (fixed string). Prints 0 when nothing matches.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL count zzz
count_matches() {
    grep -F -c "$1" "$2" 2>/dev/null || echo 0
}
trial 1 (temp 0.7) — fail — FAIL count zzz
count_matches() {
    grep -F -c "$1" "$2" 2>/dev/null || echo 0
}
trial 2 (temp 0.7) — fail — FAIL count zzz
count_matches() {
    grep -F -c "$1" "$2" 2>/dev/null || echo 0
}
retry3 — 0/3 passed
prompt sent to the model
Implement in bash: `retry3 <cmd...>`. Runs the command; if it fails, retries up to 3 total attempts. Exits 0 if any attempt succeeds, otherwise exits with the last attempt's exit code.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL flaky never succeeded
retry3() {
    local n=0
    local exit_code=0
    while [ $n -lt 3 ]; do
        "$@" && return 0
        exit_code=$?
        n=$((n + 1))
    done
    return $exit_code
}
trial 1 (temp 0.7) — fail — FAIL flaky never succeeded
retry3() {
    local n=0
    local exit_code=0
    while [ $n -lt 3 ]; do
        "$@" && return 0
        exit_code=$?
        n=$((n + 1))
    done
    return $exit_code
}
trial 2 (temp 0.7) — fail — FAIL flaky never succeeded
retry3() {
    local n=0
    local exit_code=0
    while [ $n -lt 3 ]; do
        "$@" && return 0
        exit_code=$?
        n=$((n + 1))
    done
    return $exit_code
}
extract_urls — 0/3 passed
prompt sent to the model
Implement in bash: `extract_urls`. Reads stdin, prints every http:// or https:// URL found, one per line, in order of appearance. Nothing else.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — https://c.net
extract_urls() {
  grep -oE 'https?://[^[:space:]"<>]+'
}
trial 1 (temp 0.7) — fail — https://c.net
extract_urls() {
  grep -oE 'https?://[^[:space:]"<>]+'
}
trial 2 (temp 0.7) — fail — https://c.net
extract_urls() {
  grep -oE 'https?://[^[:space:]"<>]+'
}

Bash (hard) — 4/9 (0.8 min / 2.0k tok)

find_dupes — 0/3 passed
prompt sent to the model
Implement in bash: `find_dupes <dir>`. Finds groups of regular files under <dir> (recursive) with identical content (compare by MD5). Prints one group per line: space-separated paths, sorted, only groups of 2+ files. Groups sorted by first path. Must work on macOS (BSD userland: no GNU find -printf, no md5sum — use md5 -r).
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — find: ‘md5’: No such file or directory
find_dupes() {
    local search_dir="$1"
    find "$search_dir" -type f -exec md5 -r {} + | \
    awk '{
        hash = $1;
        $1 = "";
        sub(/^ /, "", $0);
        paths[hash] = paths[hash] ? paths[hash] " " $0 : $0;
        count[hash]++;
    }
    END {
        for (h in count) {
            if (count[h] > 1) {
                split(paths[h], arr, " ");
                # Sort paths within the group
                asort(arr);
                line = "";
                for (i=1; i<=count[h]; i++) {
                    line = (line == "" ? arr[i] : line " " arr[i]);
                }
                print line;
            }
        }
    }' | sort
}
trial 1 (temp 0.7) — fail — find: ‘md5’: No such file or directory
find_dupes() {
    local search_dir="$1"
    find "$search_dir" -type f -exec md5 -r {} + | \
    awk '{
        hash = $1;
        $1 = "";
        sub(/^ /, "", $0);
        paths[$hash] = paths[$hash] ? paths[$hash] " " $0 : $0;
        count[$hash]++;
    }
    END {
        for (h in count) {
            if (count[h] > 1) {
                split(paths[h], arr, " ");
                # Sort paths within the group
                asort(arr);
                line = "";
                for (i=1; i<=count[h]; i++) {
                    line = (line == "" ? arr[i] : line " " arr[i]);
                }
                print line;
            }
        }
    }' | sort
}
trial 2 (temp 0.7) — fail — find: ‘md5’: No such file or directory
find_dupes() {
    local search_dir="$1"
    find "$search_dir" -type f -exec md5 -r {} + | \
    awk '{
        hash = $1;
        $1 = "";
        sub(/^ /, "", $0);
        paths[hash] = paths[hash] ? paths[hash] " " $0 : $0;
        count[hash]++;
    }
    END {
        for (h in count) {
            if (count[h] > 1) {
                split(paths[h], arr, " ");
                # Sort paths within the group
                asort(arr);
                line = "";
                for (i=1; i<=count[h]; i++) {
                    line = (line == "" ? arr[i] : line " " arr[i]);
                }
                print line;
            }
        }
    }' | sort
}
top_errors — 1/3 passed
prompt sent to the model
Implement in bash: `top_errors <logfile> <n>`. Prints the n most frequent ERROR signatures in <logfile>. A signature is the text after 'ERROR: ' with every run of digits replaced by '#'. Output one per line as '<count> <signature>', sorted by count descending, then signature ascending. Print nothing if there are no ERROR lines.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 1 (temp 0.7) — fail — 3disk # full
top_errors() {
    local logfile="$1"
    local n="$2"

    grep "ERROR: " "$logfile" | \
    sed 's/.*ERROR: //' | \
    sed -E 's/[0-9]+/#/g' | \
    sort | \
    uniq -c | \
    sort -k1,1nr -k2,2 | \
    head -n "$n" | \
    awk '{count=$1; $1=""; print count substr($0,2)}'
}
trial 2 (temp 0.7) — fail — 3disk # full
top_errors() {
    local logfile="$1"
    local n="$2"

    grep "ERROR: " "$logfile" | \
    sed 's/.*ERROR: //' | \
    sed -E 's/[0-9]+/#/g' | \
    sort | \
    uniq -c | \
    sort -k1,1nr -k2,2 | \
    head -n "$n" | \
    awk '{count=$1; $1=""; print count substr($0,2)}'
}

qwen3-coder-next 80B 83% overall↑ top

Served via llama.cpp Vulkan · 55.5 tok/s · 1.4 GB RAM · coding total 105/126

Bash — 20/24 (0.9 min / 1.9k tok)

extract_urls — 0/3 passed
prompt sent to the model
Implement in bash: `extract_urls`. Reads stdin, prints every http:// or https:// URL found, one per line, in order of appearance. Nothing else.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]"<>]+' 
}
trial 1 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]"<>]+' 
}
trial 2 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]"<>]+' 
}
csv_col — 2/3 passed
prompt sent to the model
Implement in bash: `csv_col <name>`. Reads a CSV from stdin (first line is a header). Prints the values of the column named <name>, one per line, in order.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL got:
csv_col() {
    local name="$1"
    local col_num
    col_num=$(head -n1 | tr ',' '\n' | grep -nx "$name" | cut -d: -f1)
    if [[ -z "$col_num" ]]; then
        return 1
    fi
    tail -n +2 | awk -F',' -v col="$col_num" '{print $col}'
}

Bash (hard) — 5/9 (0.8 min / 2.2k tok)

find_dupes — 0/3 passed
prompt sent to the model
Implement in bash: `find_dupes <dir>`. Finds groups of regular files under <dir> (recursive) with identical content (compare by MD5). Prints one group per line: space-separated paths, sorted, only groups of 2+ files. Groups sorted by first path. Must work on macOS (BSD userland: no GNU find -printf, no md5sum — use md5 -r).
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — solution.sh: line 7: md5: command not found
find_dupes() {
    local dir="$1"
    local tmp_file=$(mktemp)
    
    # Find all regular files and compute MD5 hashes
    find "$dir" -type f -print0 | while IFS= read -r -d '' file; do
        hash=$(md5 -r "$file" | cut -d' ' -f1)
        printf '%s\t%s\n' "$hash" "$file"
    done | sort > "$tmp_file"
    
    # Group files by hash and output groups with 2+ files
    awk -F'\t' '
    {
        if ($1 == prev_hash) {
            files[NR] = $2
            count++
        } else {
            if (count >= 2) {
                # Sort the collected files
                n = asorti(files, sorted_idx)
                for (i = 1; i <= n; i++) {
                    printf "%s%s", files[sorted_idx[i]], (i < n ? " " : "\n")
                }
            }
            delete files
            files[NR] = $2
            count = 1
            prev_hash = $1
        }
    }
    END {
        if (count >= 2) {
            n = asorti(files, sorted_idx)
            for (i = 1; i <= n; i++) {
                printf "%s%s", files[sorted_idx[i]], (i < n ? " " : "\n")
            }
        }
    }
    ' "$tmp_file" | sort
    
    rm -f "$tmp_file"
}
trial 1 (temp 0.7) — fail — solution.sh: line 7: md5: command not found
find_dupes() {
    local dir="$1"
    local tmp_file=$(mktemp)
    
    # Find all regular files and compute MD5 hashes
    find "$dir" -type f -print0 | while IFS= read -r -d '' file; do
        hash=$(md5 -q "$file")
        printf '%s\t%s\n' "$hash" "$file"
    done | sort > "$tmp_file"
    
    # Group files by hash and output groups with 2+ files
    awk -F'\t' '
    {
        if ($1 == prev_hash) {
            files[++n] = $2
        } else {
            if (n >= 2) {
                # Sort the files array
                for (i = 1; i <= n; i++) {
                    for (j = i + 1; j <= n; j++) {
                        if (files[i] > files[j]) {
                            tmp = files[i]
                            files[i] = files[j]
                            files[j] = tmp
                        }
                    }
                }
                # Print sorted files
                printf "%s", files[1]
                for (i = 2; i <= n; i++) {
                    printf " %s", files[i]
                }
                printf "\n"
            }
            prev_hash = $1
            n = 1
            files[1] = $2
        }
    }
    END {
        if (n >= 2) {
            for (i = 1; i <= n; i++) {
                for (j = i + 1; j <= n; j++) {
                    if (files[i] > files[j]) {
                        tmp = files[i]
                        files[i] = files[j]
                        files[j] = tmp
                    }
                }
            }
            printf "%s", files[1]
            for (i = 2; i <= n; i++) {
                printf " %s", files[i]
            }
            printf "\n"
        }
    }
    ' "$tmp_file" | sort
    
    rm -f "$tmp_file"
}
trial 2 (temp 0.7) — fail — solution.sh: line 7: md5: command not found
find_dupes() {
    local dir="$1"
    local tmp_file=$(mktemp)
    
    # Find all regular files and compute MD5 hashes
    find "$dir" -type f -print0 | while IFS= read -r -d '' file; do
        hash=$(md5 -q "$file")
        printf '%s\t%s\n' "$hash" "$file"
    done | sort > "$tmp_file"
    
    # Group files by hash and output groups with 2+ files
    awk -F'\t' '
    {
        if ($1 == prev_hash) {
            files[++n] = $2
        } else {
            if (n >= 2) {
                # Sort the files array
                for (i = 1; i <= n; i++) {
                    for (j = i + 1; j <= n; j++) {
                        if (files[i] > files[j]) {
                            tmp = files[i]
                            files[i] = files[j]
                            files[j] = tmp
                        }
                    }
                }
                # Print sorted files
                printf "%s", files[1]
                for (i = 2; i <= n; i++) {
                    printf " %s", files[i]
                }
                printf "\n"
            }
            prev_hash = $1
            n = 1
            files[1] = $2
        }
    }
    END {
        if (n >= 2) {
            for (i = 1; i <= n; i++) {
                for (j = i + 1; j <= n; j++) {
                    if (files[i] > files[j]) {
                        tmp = files[i]
                        files[i] = files[j]
                        files[j] = tmp
                    }
                }
            }
            printf "%s", files[1]
            for (i = 2; i <= n; i++) {
                printf " %s", files[i]
            }
            printf "\n"
        }
    }
    ' "$tmp_file" | sort
    
    rm -f "$tmp_file"
}
top_errors — 2/3 passed
prompt sent to the model
Implement in bash: `top_errors <logfile> <n>`. Prints the n most frequent ERROR signatures in <logfile>. A signature is the text after 'ERROR: ' with every run of digits replaced by '#'. Output one per line as '<count> <signature>', sorted by count descending, then signature ascending. Print nothing if there are no ERROR lines.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — 3 # full
top_errors() {
    local logfile="$1"
    local n="$2"
    
    grep -oP 'ERROR: [^ ]+ \K.*' "$logfile" 2>/dev/null | \
    sed 's/[0-9]\+/#/g' | \
    sort | \
    uniq -c | \
    sort -k1,1nr -k2 | \
    head -n "$n" | \
    awk '{count=$1; $1=""; sub(/^ /, ""); print count " " $0}'
}

qwen3.8-27b 83% overall↑ top

Served via llama.cpp Vulkan · 12.2 tok/s · 2.6 GB RAM · coding total 105/126

Bash — 15/24 (2.6 min / 1.6k tok)

count_matches — 0/3 passed
prompt sent to the model
Implement in bash: `count_matches <pattern> <file>`. Prints the number of lines in <file> matching <pattern> (fixed string). Prints 0 when nothing matches.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL count zzz
count_matches() {
    local pattern="$1"
    local file="$2"
    grep -F -c -- "$pattern" "$file" 2>/dev/null || echo 0
}
trial 1 (temp 0.7) — fail — FAIL count zzz
count_matches() {
    local pattern="$1"
    local file="$2"
    grep -F -c -- "$pattern" "$file" 2>/dev/null || echo 0
}
trial 2 (temp 0.7) — fail — FAIL count zzz
count_matches() {
    local pattern="$1"
    local file="$2"
    grep -F -c -- "$pattern" "$file" 2>/dev/null || echo 0
}
extract_urls — 0/3 passed
prompt sent to the model
Implement in bash: `extract_urls`. Reads stdin, prints every http:// or https:// URL found, one per line, in order of appearance. Nothing else.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]]+'
}
trial 1 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]]+'
}
trial 2 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]]+'
}
csv_col — 0/3 passed
prompt sent to the model
Implement in bash: `csv_col <name>`. Reads a CSV from stdin (first line is a header). Prints the values of the column named <name>, one per line, in order.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL got:
csv_col() {
    local name="$1"
    local header
    header=$(head -n 1)
    local idx
    idx=$(echo "$header" | awk -F',' -v col="$name" '{for(i=1;i<=NF;i++) if($i==col){print i; exit}}')
    if [[ -z "$idx" ]]; then
        return 1
    fi
    tail -n +2 | awk -F',' -v idx="$idx" '{print $idx}'
}
trial 1 (temp 0.7) — fail — FAIL got:
csv_col() {
    local name="$1"
    local header
    header=$(head -n 1)
    local idx
    idx=$(echo "$header" | awk -F',' -v col="$name" '{for(i=1;i<=NF;i++) if($i==col){print i; exit}}')
    if [[ -z "$idx" ]]; then
        return 1
    fi
    tail -n +2 | awk -F',' -v idx="$idx" '{print $idx}'
}
trial 2 (temp 0.7) — fail — FAIL got:
csv_col() {
    local name="$1"
    local header
    header=$(head -n 1)
    local idx
    idx=$(echo "$header" | awk -F',' -v col="$name" '{for(i=1;i<=NF;i++) if($i==col){print i; exit}}')
    if [[ -z "$idx" ]]; then
        return 1
    fi
    tail -n +2 | awk -F',' -v idx="$idx" '{print $idx}'
}

Bash (hard) — 3/9 (3.1 min / 2.1k tok)

find_dupes — 0/3 passed
prompt sent to the model
Implement in bash: `find_dupes <dir>`. Finds groups of regular files under <dir> (recursive) with identical content (compare by MD5). Prints one group per line: space-separated paths, sorted, only groups of 2+ files. Groups sorted by first path. Must work on macOS (BSD userland: no GNU find -printf, no md5sum — use md5 -r).
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — solution.sh: line 19: md5_map[$hash]: bad array subscript
find_dupes() {
    local dir="$1"
    local -a files=()
    local -A md5_map=()
    local -A path_map=()

    # Find all regular files
    while IFS= read -r -d '' file; do
        files+=("$file")
    done < <(find "$dir" -type f -print0)

    # Compute MD5 for each file and group by hash
    for file in "${files[@]}"; do
        local hash
        hash=$(md5 -r "$file" | awk '{print $1}')
        if [[ -n "${md5_map[$hash]+x}" ]]; then
            md5_map[$hash]="${md5_map[$hash]} $file"
        else
            md5_map[$hash]="$file"
        fi
    done

    # Collect groups with 2+ files
    local -a groups=()
    for hash in "${!md5_map[@]}"; do
        local -a group_files=()
        read -ra group_files <<< "${md5_map[$hash]}"
        if (( ${#group_files[@]} >= 2 )); then
            # Sort the files in this group
            local sorted
            sorted=$(printf '%s\n' "${group_files[@]}" | sort)
            groups+=("$sorted")
        fi
    done

    # Sort groups by first path
    if (( ${#groups[@]} > 0 )); then
        printf '%s\n' "${groups[@]}" | sort | while IFS= read -r line; do
            printf '%s\n' "$line"
        done
    fi
}
trial 1 (temp 0.7) — fail — solution.sh: line 19: md5_map[$hash]: bad array subscript
find_dupes() {
  local dir="$1"
  local -a files=()
  local -A md5_map=()
  local f md5

  # Collect all regular files
  while IFS= read -r -d '' f; do
    files+=("$f")
  done < <(find "$dir" -type f -print0)

  # Compute MD5 for each file and group by hash
  for f in "${files[@]}"; do
    md5=$(md5 -r "$f" | awk '{print $1}')
    if [[ -n "${md5_map[$md5]+x}" ]]; then
      md5_map[$md5]="${md5_map[$md5]} $f"
    else
      md5_map[$md5]="$f"
    fi
  done

  # Collect groups with 2+ files
  local -a groups=()
  local group
  for group in "${md5_map[@]}"; do
    # Count files in group
    local -a group_files=()
    read -ra group_files <<< "$group"
    if (( ${#group_files[@]} >= 2 )); then
      # Sort the files in this group
      local sorted_group
      sorted_group=$(printf '%s\n' "${group_files[@]}" | sort)
      groups+=("$sorted_group")
    fi
  done

  # Sort groups by first path
  if (( ${#groups[@]} > 0 )); then
    printf '%s\n' "${groups[@]}" | sort | while IFS= read -r line; do
      printf '%s\n' "$line"
    done
  fi
}
trial 2 (temp 0.7) — fail — solution.sh: line 19: md5_map[$hash]: bad array subscript
find_dupes() {
  local dir="$1"
  local -a files=()
  local -A md5_map=()
  local f md5

  # Collect all regular files
  while IFS= read -r -d '' f; do
    files+=("$f")
  done < <(find "$dir" -type f -print0)

  # Compute MD5 for each file and group by hash
  for f in "${files[@]}"; do
    md5=$(md5 -r "$f" | awk '{print $1}')
    if [[ -n "${md5_map[$md5]+x}" ]]; then
      md5_map[$md5]="${md5_map[$md5]} $f"
    else
      md5_map[$md5]="$f"
    fi
  done

  # Collect groups with 2+ files
  local -a groups=()
  local group
  for group in "${md5_map[@]}"; do
    # Count files in group
    local -a group_files=()
    read -ra group_files <<< "$group"
    if (( ${#group_files[@]} >= 2 )); then
      # Sort the files in this group
      local sorted_group
      sorted_group=$(printf '%s\n' "${group_files[@]}" | sort)
      groups+=("$sorted_group")
    fi
  done

  # Sort groups by first path
  if (( ${#groups[@]} > 0 )); then
    printf '%s\n' "${groups[@]}" | sort | while IFS= read -r line; do
      printf '%s\n' "$line"
    done
  fi
}
top_errors — 0/3 passed
prompt sent to the model
Implement in bash: `top_errors <logfile> <n>`. Prints the n most frequent ERROR signatures in <logfile>. A signature is the text after 'ERROR: ' with every run of digits replaced by '#'. Output one per line as '<count> <signature>', sorted by count descending, then signature ascending. Print nothing if there are no ERROR lines.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — 3 disk
top_errors() {
    local logfile="$1"
    local n="$2"

    grep -h 'ERROR: ' "$logfile" 2>/dev/null | \
    sed 's/.*ERROR: //' | \
    sed 's/[0-9]\+/#/g' | \
    sort | \
    uniq -c | \
    sort -k1,1nr -k2,2 | \
    head -n "$n" | \
    awk '{print $1, $2}'
}
trial 1 (temp 0.7) — fail — 3 disk
top_errors() {
    local logfile="$1"
    local n="$2"

    grep -h 'ERROR: ' "$logfile" 2>/dev/null | \
    sed 's/.*ERROR: //' | \
    sed 's/[0-9]\+/#/g' | \
    sort | \
    uniq -c | \
    sort -k1,1nr -k2,2 | \
    head -n "$n" | \
    awk '{print $1, $2}'
}
trial 2 (temp 0.7) — fail — 3 disk
top_errors() {
    local logfile="$1"
    local n="$2"

    grep -h 'ERROR: ' "$logfile" 2>/dev/null | \
    sed 's/.*ERROR: //' | \
    sed 's/[0-9]\+/#/g' | \
    sort | \
    uniq -c | \
    sort -k1,1nr -k2,2 | \
    head -n "$n" | \
    awk '{print $1, $2}'
}

gpt-oss-20b 83% overall↑ top

Served via llama.cpp Vulkan · 72.3 tok/s · 0.2 GB RAM · coding total 104/126

Bash — 16/24 (3.9 min / 16.2k tok)

count_matches — 2/3 passed
prompt sent to the model
Implement in bash: `count_matches <pattern> <file>`. Prints the number of lines in <file> matching <pattern> (fixed string). Prints 0 when nothing matches.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 2 (temp 0.7) — fail — FAIL count zzz
count_matches() {
    local pattern="$1"
    local file="$2"
    grep -F -c "$pattern" "$file" 2>/dev/null || echo 0
}
retry3 — 2/3 passed
prompt sent to the model
Implement in bash: `retry3 <cmd...>`. Runs the command; if it fails, retries up to 3 total attempts. Exits 0 if any attempt succeeds, otherwise exits with the last attempt's exit code.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 1 (temp 0.7) — fail
retry3() {
  local attempts=3
  local status
  for ((i=1;i<=attempts;i++)); do
    "$@" || status=$?
    if [[ ${status:-0} -eq 0 ]]; then
      exit 0
    fi
  done
  exit ${status:-1}
}
extract_urls — 0/3 passed
prompt sent to the model
Implement in bash: `extract_urls`. Reads stdin, prints every http:// or https:// URL found, one per line, in order of appearance. Nothing else.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]]+'
}
trial 1 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]]+'
}
trial 2 (temp 0.7) — fail — https://c.net
extract_urls() {
  grep -oE 'https?://[^[:space:]]+'
}
json_get — 0/3 passed
prompt sent to the model
Implement in bash: `json_get <key>`. Reads a flat JSON object on stdin and prints the string value of top-level <key>. python3 is available; jq is not.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
json_get() {
  local key="$1"
  python3 - <<'PY' "$key"
import sys, json
key = sys.argv[1]
data = json.load(sys.stdin)
if key in data:
    print(data[key])
PY
}
trial 1 (temp 0.7) — fail — json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
json_get() {
    local key="$1"
    python3 - <<'PY' "$key"
import sys, json
key = sys.argv[1]
data = json.load(sys.stdin)
value = data.get(key)
if value is not None:
    print(value, end='')
PY
}
trial 2 (temp 0.7) — fail — json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
json_get() {
  local key="$1"
  python3 - <<'PY' "$key"
import sys, json
key = sys.argv[1]
try:
    data = json.load(sys.stdin)
    val = data.get(key)
    if isinstance(val, str):
        print(val)
except Exception:
    pass
PY
}

Bash (hard) — 5/9 (4.3 min / 17.8k tok)

find_dupes — 0/3 passed
prompt sent to the model
Implement in bash: `find_dupes <dir>`. Finds groups of regular files under <dir> (recursive) with identical content (compare by MD5). Prints one group per line: space-separated paths, sorted, only groups of 2+ files. Groups sorted by first path. Must work on macOS (BSD userland: no GNU find -printf, no md5sum — use md5 -r).
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — solution.sh: line 10: md5: command not found
find_dupes() {
    local dir="$1"
    if [[ -z "$dir" ]]; then
        printf 'Usage: find_dupes <dir>\n' >&2
        return 1
    fi

    find "$dir" -type f -print0 | \
    while IFS= read -r -d '' file; do
        md5 -r "$file" | awk -v f="$file" -v OFS=$'\t' '{print $1, f}'
    done | \
    sort -t$'\t' -k1,1 -k2,2 | \
    awk -F$'\t' '
    {
        if (hash != $1) {
            if (count >= 2) {
                print group
            }
            hash = $1
            group = $2
            count = 1
        } else {
            group = group " " $2
            count++
        }
    }
    END {
        if (count >= 2) print group
    }
    ' | \
    sort -k1,1
}
trial 1 (temp 0.7) — fail — solution.sh: line 10: md5: command not found
find_dupes() {
  local dir="$1"
  if [[ -z "$dir" ]]; then
    echo "Usage: find_dupes <dir>" >&2
    return 1
  fi

  find "$dir" -type f -print0 | while IFS= read -r -d '' file; do
    hash=$(md5 -q "$file")
    printf '%s\t%s\n' "$hash" "$file"
  done | sort -k1,1 -k2,2 | awk -F'\t' '
    BEGIN{prev=""; paths=""; count=0}
    {
      if ($1 != prev) {
        if (count>1) print paths
        prev=$1; paths=$2; count=1
      } else {
        paths = paths " " $2; count++
      }
    }
    END{ if (count>1) print paths }
  ' | sort -k1,1
}
trial 2 (temp 0.7) — fail — solution.sh: line 10: md5: command not found
find_dupes() {
    local dir="$1"
    if [[ -z "$dir" ]]; then
        echo "Usage: find_dupes <dir>" >&2
        return 1
    fi

    find "$dir" -type f -print0 | while IFS= read -r -d '' file; do
        local hash
        hash=$(md5 -q "$file")
        printf '%s\t%s\n' "$hash" "$file"
    done | sort -t$'\t' -k1,1 -k2,2 | awk -F'\t' '
    {
        if (hash != $1) {
            if (NR > 1 && n >= 2) {
                out = paths[1]
                for (i = 2; i <= n; i++) out = out " " paths[i]
                print out
            }
            hash = $1
            n = 0
        }
        n++
        paths[n] = $2
    }
    END {
        if (n >= 2) {
            out = paths[1]
            for (i = 2; i <= n; i++) out = out " " paths[i]
            print out
        }
    }
    ' | sort -k1,1
}
backup_rotate — 2/3 passed
prompt sent to the model
Implement in bash: `backup_rotate <dir> <keep>`. In <dir>, deletes all but the <keep> newest files matching backup-*.tar.gz (newest = lexicographically greatest names). Prints each deleted file's name (not path), one per line, oldest first. Deletes nothing if there are <= <keep> backups (prints nothing).
Reply with only a bash code block defining the function. No tests, no explanation.
trial 1 (temp 0.7) — truncated — hit the 4096-token cap
(no code extracted)

nemotron-3-super 120B 83% overall↑ top

Served via llama.cpp Vulkan · 17.5 tok/s · 2.9 GB RAM · coding total 104/126

Bash — 15/24 (1.7 min / 1.6k tok)

count_matches — 0/3 passed
prompt sent to the model
Implement in bash: `count_matches <pattern> <file>`. Prints the number of lines in <file> matching <pattern> (fixed string). Prints 0 when nothing matches.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL count zzz
count_matches() {
    local pattern="$1"
    local file="$2"
    grep -F -c "$pattern" "$file" 2>/dev/null || echo 0
}
trial 1 (temp 0.7) — fail — FAIL count zzz
count_matches() {
    local pattern="$1"
    local file="$2"
    grep -F -c "$pattern" "$file" 2>/dev/null || echo 0
}
trial 2 (temp 0.7) — fail — FAIL count zzz
count_matches() {
    local pattern="$1"
    local file="$2"
    grep -F -c "$pattern" "$file" 2>/dev/null || echo 0
}
extract_urls — 0/3 passed
prompt sent to the model
Implement in bash: `extract_urls`. Reads stdin, prints every http:// or https:// URL found, one per line, in order of appearance. Nothing else.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]]+' | tr '\n' '\n'
}
trial 1 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]]+' | tr '\n' '\n'
}
trial 2 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]]+' | tr '\n' '\n'
}
csv_col — 0/3 passed
prompt sent to the model
Implement in bash: `csv_col <name>`. Reads a CSV from stdin (first line is a header). Prints the values of the column named <name>, one per line, in order.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL got:
csv_col() {
    local name="$1"
    local header_line
    header_line=$(head -n 1)
    local col_num=0
    local IFS=,
    read -ra headers <<< "$header_line"
    for i in "${!headers[@]}"; do
        if [[ "${headers[i]}" == "$name" ]]; then
            col_num=$((i + 1))
            break
        fi
    done
    if [[ $col_num -eq 0 ]]; then
        return 1
    fi
    tail -n +2 | cut -d, -f"$col_num"
}
trial 1 (temp 0.7) — fail — FAIL got:
csv_col() {
    local name="$1"
    local header_line
    header_line=$(head -n 1)
    local col_num=0
    local IFS=,
    read -ra headers <<< "$header_line"
    for i in "${!headers[@]}"; do
        if [[ "${headers[i]}" == "$name" ]]; then
            col_num=$((i + 1))
            break
        fi
    done
    if [[ $col_num -eq 0 ]]; then
        return 1
    fi
    tail -n +2 | cut -d, -f"$col_num"
}
trial 2 (temp 0.7) — fail — FAIL got:
csv_col() {
    local name="$1"
    local header_line
    header_line=$(head -n 1)
    local col_num=0
    local IFS=,
    read -ra headers <<< "$header_line"
    for i in "${!headers[@]}"; do
        if [[ "${headers[i]}" == "$name" ]]; then
            col_num=$((i + 1))
            break
        fi
    done
    if [[ $col_num -eq 0 ]]; then
        return 1
    fi
    tail -n +2 | cut -d, -f"$col_num"
}

Bash (hard) — 3/9 (1.5 min / 1.4k tok)

find_dupes — 0/3 passed
prompt sent to the model
Implement in bash: `find_dupes <dir>`. Finds groups of regular files under <dir> (recursive) with identical content (compare by MD5). Prints one group per line: space-separated paths, sorted, only groups of 2+ files. Groups sorted by first path. Must work on macOS (BSD userland: no GNU find -printf, no md5sum — use md5 -r).
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — find: ‘md5’: No such file or directory
find_dupes() {
    local dir="$1"
    find "$dir" -type f -exec md5 -r {} + | sort | awk '
        {
            md5 = $1
            file = $2
            if (md5 != prev_md5) {
                if (count >= 2) {
                    for (i = 0; i < count; i++) printf "%s%s", files[i], (i == count-1 ? "\n" : " ")
                }
                delete files
                count = 0
                prev_md5 = md5
            }
            files[count++] = file
        }
        END {
            if (count >= 2) {
                for (i = 0; i < count; i++) printf "%s%s", files[i], (i == count-1 ? "\n" : " ")
            }
        }
    ' | sort
}
trial 1 (temp 0.7) — fail — find: ‘md5’: No such file or directory
find_dupes() {
    local dir="$1"
    find "$dir" -type f -exec md5 -r {} + | sort | awk '
        {
            md5 = $1
            file = $2
            if (md5 != prev_md5) {
                if (count >= 2) {
                    for (i = 0; i < count; i++) printf "%s%s", files[i], (i == count-1 ? "\n" : " ")
                }
                delete files
                count = 0
                prev_md5 = md5
            }
            files[count++] = file
        }
        END {
            if (count >= 2) {
                for (i = 0; i < count; i++) printf "%s%s", files[i], (i == count-1 ? "\n" : " ")
            }
        }
    ' | sort
}
trial 2 (temp 0.7) — fail — find: ‘md5’: No such file or directory
find_dupes() {
    local dir="$1"
    find "$dir" -type f -exec md5 -r {} + | sort | awk '
        {
            md5 = $1
            file = $2
            if (md5 != prev_md5) {
                if (count >= 2) {
                    for (i = 0; i < count; i++) printf "%s%s", files[i], (i == count-1 ? "\n" : " ")
                }
                delete files
                count = 0
                prev_md5 = md5
            }
            files[count++] = file
        }
        END {
            if (count >= 2) {
                for (i = 0; i < count; i++) printf "%s%s", files[i], (i == count-1 ? "\n" : " ")
            }
        }
    ' | sort
}
top_errors — 0/3 passed
prompt sent to the model
Implement in bash: `top_errors <logfile> <n>`. Prints the n most frequent ERROR signatures in <logfile>. A signature is the text after 'ERROR: ' with every run of digits replaced by '#'. Output one per line as '<count> <signature>', sorted by count descending, then signature ascending. Print nothing if there are no ERROR lines.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — 3 disk
top_errors() {
    local logfile="$1"
    local n="$2"
    grep -o 'ERROR: .*' "$logfile" | sed 's/^ERROR: //; s/[0-9]\+/#/g' | sort | uniq -c | sort -k1,1nr -k2,2 | head -n "$n" | awk '{print $1, $2}'
}
trial 1 (temp 0.7) — fail — 3 disk
top_errors() {
    local logfile="$1"
    local n="$2"
    grep -o 'ERROR: .*' "$logfile" | sed 's/^ERROR: //; s/[0-9]\+/#/g' | sort | uniq -c | sort -k1,1nr -k2,2 | head -n "$n" | awk '{print $1, $2}'
}
trial 2 (temp 0.7) — fail — 3 disk
top_errors() {
    local logfile="$1"
    local n="$2"
    grep -o 'ERROR: .*' "$logfile" | sed 's/^ERROR: //; s/[0-9]\+/#/g' | sort | uniq -c | sort -k1,1nr -k2,2 | head -n "$n" | awk '{print $1, $2}'
}

glm-4.7-flash 82% overall↑ top

Served via llama.cpp Vulkan · 63.7 tok/s · 0.3 GB RAM · coding total 103/126

Bash — 15/24 (0.6 min / 2.1k tok)

count_matches — 0/3 passed
prompt sent to the model
Implement in bash: `count_matches <pattern> <file>`. Prints the number of lines in <file> matching <pattern> (fixed string). Prints 0 when nothing matches.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL count zzz
count_matches() {
    local pattern="$1"
    local file="$2"
    grep -F -c "$pattern" "$file" 2>/dev/null || echo 0
}
trial 1 (temp 0.7) — fail — FAIL count zzz
count_matches() {
    local pattern="$1"
    local file="$2"
    grep -F -c "$pattern" "$file" 2>/dev/null || echo 0
}
trial 2 (temp 0.7) — fail — FAIL count zzz
count_matches() {
    local pattern="$1"
    local file="$2"
    grep -F -c "$pattern" "$file" 2>/dev/null || echo 0
}
retry3 — 0/3 passed
prompt sent to the model
Implement in bash: `retry3 <cmd...>`. Runs the command; if it fails, retries up to 3 total attempts. Exits 0 if any attempt succeeds, otherwise exits with the last attempt's exit code.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL false succeeded
retry3() {
    local attempts=0
    local max_attempts=3
    local exit_code=0

    while [ $attempts -lt $max_attempts ]; do
        if "$@"; then
            return 0
        fi
        exit_code=$?
        attempts=$((attempts + 1))
        if [ $attempts -lt $max_attempts ]; then
            sleep 1
        fi
    done

    return $exit_code
}
trial 1 (temp 0.7) — fail — FAIL false succeeded
retry3() {
    local attempts=0
    local max_attempts=3
    local exit_code=0

    while [ $attempts -lt $max_attempts ]; do
        if "$@"; then
            return 0
        fi
        exit_code=$?
        attempts=$((attempts + 1))
        if [ $attempts -lt $max_attempts ]; then
            sleep 1
        fi
    done

    return $exit_code
}
trial 2 (temp 0.7) — fail — FAIL false succeeded
retry3() {
    local attempts=0
    local max_attempts=3
    local exit_code=0

    while [ $attempts -lt $max_attempts ]; do
        if "$@"; then
            return 0
        fi
        exit_code=$?
        attempts=$((attempts + 1))
        if [ $attempts -lt $max_attempts ]; then
            sleep 1
        fi
    done

    return $exit_code
}
extract_urls — 0/3 passed
prompt sent to the model
Implement in bash: `extract_urls`. Reads stdin, prints every http:// or https:// URL found, one per line, in order of appearance. Nothing else.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]]+' | sort -u
}
trial 1 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]]+' | sort -u
}
trial 2 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]]+' | sort -u
}

Bash (hard) — 3/9 (0.7 min / 2.8k tok)

find_dupes — 0/3 passed
prompt sent to the model
Implement in bash: `find_dupes <dir>`. Finds groups of regular files under <dir> (recursive) with identical content (compare by MD5). Prints one group per line: space-separated paths, sorted, only groups of 2+ files. Groups sorted by first path. Must work on macOS (BSD userland: no GNU find -printf, no md5sum — use md5 -r).
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — find: ‘md5’: No such file or directory
find_dupes() {
    local dir="$1"
    local temp_file=$(mktemp)
    local temp_list=$(mktemp)

    # Generate MD5 hashes and store paths
    find "$dir" -type f -exec md5 -r {} + | awk '{print $1, $NF}' > "$temp_file"

    # Sort by hash, then by path
    sort "$temp_file" > "$temp_list"

    # Process groups
    awk '
    BEGIN { prev_hash = ""; first_path = ""; count = 0; }
    {
        if ($1 != prev_hash) {
            if (count > 1) {
                # Print the previous group
                printf "%s", first_path;
                for (i = 2; i <= count; i++) printf " %s", paths[i];
                printf "\n";
            }
            # Start new group
            prev_hash = $1;
            first_path = $2;
            count = 1;
            paths[1] = $2;
        } else {
            # Add to current group
            count++;
            paths[count] = $2;
        }
    }
    END {
        if (count > 1) {
            printf "%s", first_path;
            for (i = 2; i <= count; i++) printf " %s", paths[i];
            printf "\n";
        }
    }
    ' "$temp_list"

    rm -f "$temp_file" "$temp_list"
}
trial 1 (temp 0.7) — fail — find: ‘md5’: No such file or directory
find_dupes() {
    local dir="$1"
    local temp_file=$(mktemp)
    local temp_list=$(mktemp)

    # Generate MD5 hashes and store paths
    find "$dir" -type f -exec md5 -r {} + | while read -r hash file; do
        echo "$hash $file"
    done > "$temp_file"

    # Sort by hash, then by path
    sort "$temp_file" > "$temp_list"

    # Process groups
    awk '
    BEGIN { prev_hash = ""; first_file = ""; count = 0; }
    {
        if ($1 != prev_hash) {
            if (count > 1) {
                # Print the previous group
                printf "%s", first_file;
                for (i = 2; i <= count; i++) {
                    printf " %s", files[i];
                }
                printf "\n";
            }
            # Start new group
            prev_hash = $1;
            first_file = $2;
            count = 1;
            files[1] = $2;
        } else {
            # Add to current group
            count++;
            files[count] = $2;
        }
    }
    END {
        if (count > 1) {
            printf "%s", first_file;
            for (i = 2; i <= count; i++) {
                printf " %s", files[i];
            }
            printf "\n";
        }
    }
    ' "$temp_list"

    rm -f "$temp_file" "$temp_list"
}
trial 2 (temp 0.7) — fail — find: ‘md5’: No such file or directory
find_dupes() {
    local dir="$1"
    local temp_file=$(mktemp)
    local temp_list=$(mktemp)

    # Generate MD5 hashes and store paths
    find "$dir" -type f -exec md5 -r {} + | while read -r hash file; do
        echo "$hash $file"
    done > "$temp_file"

    # Sort by hash, then by path
    sort "$temp_file" > "$temp_list"

    # Process groups
    awk '
    BEGIN { prev_hash = ""; first_file = ""; count = 0; }
    {
        if ($1 != prev_hash) {
            if (count > 1) {
                # Print the previous group
                printf "%s", first_file;
                for (i = 2; i <= count; i++) {
                    printf " %s", files[i];
                }
                printf "\n";
            }
            # Start new group
            prev_hash = $1;
            first_file = $2;
            count = 1;
            files[1] = $2;
        } else {
            # Add to current group
            count++;
            files[count] = $2;
        }
    }
    END {
        if (count > 1) {
            printf "%s", first_file;
            for (i = 2; i <= count; i++) {
                printf " %s", files[i];
            }
            printf "\n";
        }
    }
    ' "$temp_list"

    rm -f "$temp_file" "$temp_list"
}
top_errors — 0/3 passed
prompt sent to the model
Implement in bash: `top_errors <logfile> <n>`. Prints the n most frequent ERROR signatures in <logfile>. A signature is the text after 'ERROR: ' with every run of digits replaced by '#'. Output one per line as '<count> <signature>', sorted by count descending, then signature ascending. Print nothing if there are no ERROR lines.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — timeout 3
top_errors() {
    local logfile="$1"
    local n="$2"
    
    awk -v n="$n" '
    BEGIN { count = 0; }
    /ERROR: / {
        # Extract text after "ERROR: " and replace digits with #
        sig = substr($0, index($0, "ERROR: ") + 7);
        gsub(/[0-9]+/, "#", sig);
        
        # Store signature and count
        sigs[sig] = sigs[sig] + 1;
        count++;
    }
    END {
        # Sort signatures by count descending, then signature ascending
        for (s in sigs) {
            sigs[s] = count - sigs[s] " " s;
        }
        
        # Print top n
        for (i = 0; i < n; i++) {
            max = -1;
            for (s in sigs) {
                if (sigs[s] > max) {
                    max = sigs[s];
                    best = s;
                }
            }
            if (max != -1) {
                split(max, parts, " ");
                print parts[2] " " parts[1];
                delete sigs[best];
            }
        }
    }
    ' "$logfile"
}
trial 1 (temp 0.7) — fail — timeout 3
top_errors() {
    local logfile="$1"
    local n="$2"
    
    awk -v n="$n" '
    BEGIN { count = 0; }
    /ERROR: / {
        # Extract text after "ERROR: " and replace digits with #
        match($0, /ERROR: (.*)/, arr)
        sig = arr[1]
        gsub(/[0-9]+/, "#", sig)
        
        # Store signature and count
        sigs[count] = sig
        counts[count] = 1
        
        # Check if we have more than n entries
        if (count >= n) {
            # Find the minimum count among the first n entries
            min_count = counts[0]
            min_idx = 0
            for (i = 1; i < n; i++) {
                if (counts[i] < min_count) {
                    min_count = counts[i]
                    min_idx = i
                }
            }
            
            # If current count is greater than min_count, replace the min entry
            if (1 > min_count) {
                sigs[min_idx] = sig
                counts[min_idx] = 1
            }
        } else {
            count++
        }
    }
    END {
        # Prepare output array
        for (i = 0; i < count; i++) {
            output[i] = counts[i] " " sigs[i]
        }
        
        # Sort output: count desc, signature asc
        for (i = 0; i < count; i++) {
            for (j = i + 1; j < count; j++) {
                if (output[i] < output[j]) {
                    temp = output[i]
                    output[i] = output[j]
                    output[j] = temp
                }
            }
        }
        
        # Print results
        for (i = 0; i < count; i++) {
            print output[i]
        }
    }
    ' "$logfile"
}
trial 2 (temp 0.7) — fail — timeout 3
top_errors() {
    local logfile="$1"
    local n="$2"
    
    awk -v n="$n" '
    BEGIN { count = 0; }
    /ERROR: / {
        # Extract text after "ERROR: " and replace digits with #
        match($0, /ERROR: (.*)/, arr)
        sig = arr[1]
        gsub(/[0-9]+/, "#", sig)
        
        # Store signature and count
        sigs[count] = sig
        counts[count] = 1
        
        # Check if we have more than n entries
        if (count >= n) {
            # Find the minimum count among the first n entries
            min_count = counts[0]
            min_idx = 0
            for (i = 1; i < n; i++) {
                if (counts[i] < min_count) {
                    min_count = counts[i]
                    min_idx = i
                }
            }
            
            # If current count is greater than min_count, replace the min entry
            if (1 > min_count) {
                sigs[min_idx] = sig
                counts[min_idx] = 1
            }
        } else {
            count++
        }
    }
    END {
        # Prepare output array
        for (i = 0; i < count; i++) {
            output[i] = counts[i] " " sigs[i]
        }
        
        # Sort output: count desc, signature asc
        for (i = 0; i < count; i++) {
            for (j = i + 1; j < count; j++) {
                if (output[i] < output[j]) {
                    temp = output[i]
                    output[i] = output[j]
                    output[j] = temp
                }
            }
        }
        
        # Print results
        for (i = 0; i < count; i++) {
            print output[i]
        }
    }
    ' "$logfile"
}

laguna-xs.2 81% overall↑ top

Served via llama.cpp Vulkan · 86.2 tok/s · 0.3 GB RAM · coding total 102/126

Bash — 21/24 (0.5 min / 1.8k tok)

extract_urls — 0/3 passed
prompt sent to the model
Implement in bash: `extract_urls`. Reads stdin, prints every http:// or https:// URL found, one per line, in order of appearance. Nothing else.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]"]+' | sed 's/[")'"'"']$//'
}
trial 1 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]"]+' |
    sed 's/[")'"'"']$//'
}
trial 2 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]"]+' | while read -r url; do
        echo "$url"
    done
}

Bash (hard) — 6/9 (0.5 min / 2.0k tok)

find_dupes — 0/3 passed
prompt sent to the model
Implement in bash: `find_dupes <dir>`. Finds groups of regular files under <dir> (recursive) with identical content (compare by MD5). Prints one group per line: space-separated paths, sorted, only groups of 2+ files. Groups sorted by first path. Must work on macOS (BSD userland: no GNU find -printf, no md5sum — use md5 -r).
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — solution.sh: line 9: md5: command not found
find_dupes() {
    local dir="$1"
    local tmpfile
    tmpfile=$(mktemp)
    
    # Find all regular files and compute their MD5 hashes
    while IFS= read -r -d '' file; do
        if [[ -f "$file" ]]; then
            hash=$(md5 -r "$file" | awk '{print $1}')
            printf '%s\t%s\n' "$hash" "$file"
        fi
    done < <(find "$dir" -type f -print0) > "$tmpfile"
    
    # Group files by hash, filter groups with 2+ files, sort and output
    awk -F'\t' '
        {
            hash = $1
            file = $2
            files[hash] = files[hash] (files[hash] ? " " : "") file
        }
        END {
            for (hash in files) {
                n = split(files[hash], arr, " ")
                if (n >= 2) {
                    # Sort the files in the group
                    for (i = 1; i <= n; i++) {
                        for (j = i + 1; j <= n; j++) {
                            if (arr[i] > arr[j]) {
                                tmp = arr[i]
                                arr[i] = arr[j]
                                arr[j] = tmp
                            }
                        }
                    }
                    # Build the sorted group string
                    group = arr[1]
                    for (i = 2; i <= n; i++) {
                        group = group " " arr[i]
                    }
                    print group
                }
            }
        }
    ' "$tmpfile" | sort
    
    rm -f "$tmpfile"
}
trial 1 (temp 0.7) — fail — solution.sh: line 9: md5: command not found
find_dupes() {
    local dir="$1"
    local tmpfile
    tmpfile=$(mktemp)
    
    # Find all regular files and compute their MD5 hashes
    while IFS= read -r -d '' file; do
        if [[ -f "$file" ]]; then
            hash=$(md5 -r "$file" | awk '{print $1}')
            printf '%s\t%s\n' "$hash" "$file"
        fi
    done < <(find "$dir" -type f -print0) > "$tmpfile"
    
    # Group files by hash, filter groups with 2+ files, sort and output
    awk -F'\t' '
        {
            hash = $1
            file = $2
            files[hash] = files[hash] (files[hash] ? " " : "") file
        }
        END {
            for (hash in files) {
                if (split(files[hash], arr, " ") >= 2) {
                    n = asort(arr)
                    printf "%s\n", arr[1]
                    for (i = 2; i <= n; i++) {
                        printf " %s", arr[i]
                    }
                    printf "\n"
                }
            }
        }
    ' "$tmpfile" | sort
    
    rm -f "$tmpfile"
}
trial 2 (temp 0.7) — fail — solution.sh: line 9: md5: command not found
find_dupes() {
    local dir="$1"
    local tmpfile
    tmpfile=$(mktemp)
    
    # Find all regular files and compute their MD5 hashes
    while IFS= read -r -d '' file; do
        if [[ -f "$file" ]]; then
            md5 -r "$file" | awk '{print $1 "\t" $2}'
        fi
    done < <(find "$dir" -type f -print0) | sort > "$tmpfile"
    
    # Group files by hash and print groups with 2+ files
    awk -F'\t' '
    {
        hash = $1
        file = $2
        files[hash] = files[hash] (files[hash] ? " " : "") file
        count[hash]++
    }
    END {
        # Sort hashes by their first file path
        n = asorti(count, sorted_hashes, "@ind_str_asc")
        
        # Re-sort to get groups ordered by first path
        for (i = 1; i <= n; i++) {
            h = sorted_hashes[i]
            if (count[h] >= 2) {
                # Split files and sort them
                nfiles = split(files[h], arr, " ")
                # Bubble sort the file paths
                for (j = 1; j <= nfiles; j++) {
                    for (k = j + 1; k <= nfiles; k++) {
                        if (arr[j] > arr[k]) {
                            tmp = arr[j]
                            arr[j] = arr[k]
                            arr[k] = tmp
                        }
                    }
                }
                # Print sorted file paths
                printf "%s", arr[1]
                for (j = 2; j <= nfiles; j++) {
                    printf " %s", arr[j]
                }
                print ""
            }
        }
    }' "$tmpfile"
    
    rm -f "$tmpfile"
}

qwen3.6-27b 79% overall↑ top

Served via llama.cpp Vulkan · 12.5 tok/s · 2.6 GB RAM · coding total 100/126

Bash — 21/24 (2.9 min / 1.8k tok)

extract_urls — 0/3 passed
prompt sent to the model
Implement in bash: `extract_urls`. Reads stdin, prints every http:// or https:// URL found, one per line, in order of appearance. Nothing else.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]"<>()]+'
}
trial 1 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]"<>()]+'
}
trial 2 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]"<>()]+'
}

Bash (hard) — 3/9 (3.5 min / 2.4k tok)

find_dupes — 0/3 passed
prompt sent to the model
Implement in bash: `find_dupes <dir>`. Finds groups of regular files under <dir> (recursive) with identical content (compare by MD5). Prints one group per line: space-separated paths, sorted, only groups of 2+ files. Groups sorted by first path. Must work on macOS (BSD userland: no GNU find -printf, no md5sum — use md5 -r).
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — solution.sh: line 21: hash_files[$hash]: bad array subscript
find_dupes() {
    local dir="$1"
    if [[ -z "$dir" || ! -d "$dir" ]]; then
        return 1
    fi

    # Associative array to map md5 hash to list of files
    declare -A hash_files

    # Find all regular files recursively
    while IFS= read -r -d '' file; do
        # Compute MD5 hash using BSD md5 -r (format: hash  filename)
        # We only need the hash part
        local hash
        hash=$(md5 -r "$file" | cut -d ' ' -f 1)
        
        # Append file to the list for this hash
        if [[ -n "${hash_files[$hash]}" ]]; then
            hash_files[$hash]+=$'\n'"$file"
        else
            hash_files[$hash]="$file"
        fi
    done < <(find "$dir" -type f -print0)

    # Collect groups with 2+ files
    local groups=()
    for hash in "${!hash_files[@]}"; do
        local files_str="${hash_files[$hash]}"
        # Count number of files (lines)
        local count
        count=$(echo "$files_str" | wc -l | tr -d ' ')
        if (( count >= 2 )); then
            # Sort the files within the group
            local sorted_files
            sorted_files=$(echo "$files_str" | sort)
            # Join with spaces
            local group_line
            group_line=$(echo "$sorted_files" | tr '\n' ' ' | sed 's/ $//')
            groups+=("$group_line")
        fi
    done

    # Sort groups by the first path (which is the first word in each line)
    if (( ${#groups[@]} > 0 )); then
        printf '%s\n' "${groups[@]}" | sort -k1,1
    fi
}
trial 1 (temp 0.7) — fail — solution.sh: line 21: hash_files[$hash]: bad array subscript
find_dupes() {
    local dir="$1"
    if [[ -z "$dir" || ! -d "$dir" ]]; then
        return 1
    fi

    # Associative array to map md5 hash to list of files
    declare -A hash_files

    # Find all regular files recursively
    while IFS= read -r -d '' file; do
        # Compute MD5 hash using BSD md5 -r (format: hash  filename)
        # We only need the hash part
        local hash
        hash=$(md5 -r "$file" | cut -d ' ' -f 1)
        
        # Append file to the list for this hash
        if [[ -n "${hash_files[$hash]}" ]]; then
            hash_files[$hash]+=$'\n'"$file"
        else
            hash_files[$hash]="$file"
        fi
    done < <(find "$dir" -type f -print0)

    # Collect groups with 2+ files
    local groups=()
    for hash in "${!hash_files[@]}"; do
        local files_str="${hash_files[$hash]}"
        # Count number of files (lines)
        local count
        count=$(echo "$files_str" | wc -l | tr -d ' ')
        if (( count >= 2 )); then
            # Sort the files within the group
            local sorted_files
            sorted_files=$(echo "$files_str" | sort)
            # Join with spaces
            local group_line
            group_line=$(echo "$sorted_files" | tr '\n' ' ' | sed 's/ $//')
            groups+=("$group_line")
        fi
    done

    # Sort groups by the first path (which is the first word in each line)
    if (( ${#groups[@]} > 0 )); then
        printf '%s\n' "${groups[@]}" | sort -k1,1
    fi
}
trial 2 (temp 0.7) — fail — solution.sh: line 21: hash_files[$hash]: bad array subscript
find_dupes() {
    local dir="$1"
    if [[ -z "$dir" || ! -d "$dir" ]]; then
        return 1
    fi

    # Associative array to map md5 hash to list of files
    declare -A hash_files

    # Find all regular files recursively
    while IFS= read -r -d '' file; do
        # Compute MD5 hash using BSD md5 -r (format: hash  filename)
        # We only need the hash part
        local hash
        hash=$(md5 -r "$file" | cut -d ' ' -f 1)
        
        # Append file to the list for this hash
        if [[ -n "${hash_files[$hash]}" ]]; then
            hash_files[$hash]+=$'\n'"$file"
        else
            hash_files[$hash]="$file"
        fi
    done < <(find "$dir" -type f -print0)

    # Collect groups with 2+ files
    local groups=()
    for hash in "${!hash_files[@]}"; do
        local files_str="${hash_files[$hash]}"
        # Count number of files (lines)
        local count
        count=$(echo "$files_str" | wc -l | tr -d ' ')
        if (( count >= 2 )); then
            # Sort the files within the group
            local sorted_files
            sorted_files=$(echo "$files_str" | sort)
            # Join with spaces
            local group_line
            group_line=$(echo "$sorted_files" | tr '\n' ' ' | sed 's/ $//')
            groups+=("$group_line")
        fi
    done

    # Sort groups by the first path (which is the first word in each line)
    if (( ${#groups[@]} > 0 )); then
        printf '%s\n' "${groups[@]}" | sort -k1,1
    fi
}
top_errors — 0/3 passed
prompt sent to the model
Implement in bash: `top_errors <logfile> <n>`. Prints the n most frequent ERROR signatures in <logfile>. A signature is the text after 'ERROR: ' with every run of digits replaced by '#'. Output one per line as '<count> <signature>', sorted by count descending, then signature ascending. Print nothing if there are no ERROR lines.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — 3 #-#-# disk # full
top_errors() {
    local logfile="$1"
    local n="$2"

    if [[ ! -f "$logfile" ]]; then
        return
    fi

    grep 'ERROR: ' "$logfile" | \
    sed 's/ERROR: //' | \
    sed 's/[0-9]\+/#/g' | \
    sort | \
    uniq -c | \
    sort -k1,1nr -k2 | \
    head -n "$n" | \
    sed 's/^ *//' | \
    awk '{print $1, substr($0, index($0, $2))}'
}
trial 1 (temp 0.7) — fail — 3 #-#-# disk # full
top_errors() {
    local logfile="$1"
    local n="$2"

    if [[ ! -f "$logfile" ]]; then
        return
    fi

    grep 'ERROR: ' "$logfile" | \
    sed 's/ERROR: //' | \
    sed 's/[0-9]\+/#/g' | \
    sort | \
    uniq -c | \
    sort -k1,1nr -k2 | \
    head -n "$n" | \
    sed 's/^ *//' | \
    awk '{print $1, substr($0, index($0, $2))}'
}
trial 2 (temp 0.7) — fail — 3 #-#-# disk # full
top_errors() {
    local logfile="$1"
    local n="$2"

    if [[ ! -f "$logfile" ]]; then
        return
    fi

    grep 'ERROR: ' "$logfile" | \
    sed 's/ERROR: //' | \
    sed 's/[0-9]\+/#/g' | \
    sort | \
    uniq -c | \
    sort -k1,1nr -k2 | \
    head -n "$n" | \
    sed 's/^ *//' | \
    awk '{print $1, substr($0, index($0, $2))}'
}

devstral-2 24b 76% overall↑ top

Served via llama.cpp Vulkan · 14.7 tok/s · 0.5 GB RAM · coding total 96/126

Bash — 18/24 (1.4 min / 1.2k tok)

extract_urls — 0/3 passed
prompt sent to the model
Implement in bash: `extract_urls`. Reads stdin, prints every http:// or https:// URL found, one per line, in order of appearance. Nothing else.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]"]+' | sort -u
}
trial 1 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]"]+' | sort -u
}
trial 2 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]"]+' | sort -u
}
csv_col — 0/3 passed
prompt sent to the model
Implement in bash: `csv_col <name>`. Reads a CSV from stdin (first line is a header). Prints the values of the column named <name>, one per line, in order.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL got:
csv_col() {
    local -r name="$1"
    local -r header=$(head -n 1)
    local -r col_index=$(echo "$header" | tr ',' '\n' | grep -n "^${name}$" | cut -d: -f1)
    tail -n +2 | while IFS=, read -r -a row; do
        if [ "$col_index" -le "${#row[@]}" ]; then
            echo "${row[$((col_index - 1))]}"
        fi
    done
}
trial 1 (temp 0.7) — fail — FAIL got:
csv_col() {
    local -r name="$1"
    local -r header=$(head -n 1)
    local -r col_index=$(echo "$header" | tr ',' '\n' | grep -n "^${name}$" | cut -d: -f1)
    tail -n +2 | while IFS=, read -r -a row; do
        if [ "$col_index" -le "${#row[@]}" ]; then
            echo "${row[$((col_index - 1))]}"
        fi
    done
}
trial 2 (temp 0.7) — fail — FAIL got:
csv_col() {
    local -r name="$1"
    local -r header=$(head -n 1)
    local -r col_index=$(echo "$header" | tr ',' '\n' | grep -n "^${name}$" | cut -d: -f1)
    tail -n +2 | while IFS=, read -r -a row; do
        if [ "$col_index" -le "${#row[@]}" ]; then
            echo "${row[$((col_index - 1))]}"
        fi
    done
}

Bash (hard) — 6/9 (1.5 min / 1.3k tok)

find_dupes — 0/3 passed
prompt sent to the model
Implement in bash: `find_dupes <dir>`. Finds groups of regular files under <dir> (recursive) with identical content (compare by MD5). Prints one group per line: space-separated paths, sorted, only groups of 2+ files. Groups sorted by first path. Must work on macOS (BSD userland: no GNU find -printf, no md5sum — use md5 -r).
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — find: ‘md5’: No such file or directory
find_dupes() {
    dir="$1"
    find "$dir" -type f -exec md5 -r {} + | sort -k1,1 -k2,2 | uniq -w32 -d -f1 | awk '{print $2}' | sort -k1,1
}
trial 1 (temp 0.7) — fail — find: ‘md5’: No such file or directory
find_dupes() {
    dir="$1"
    find "$dir" -type f -exec md5 -r {} + | sort -k1,1 -k2,2 | uniq -w32 -d -f1 | awk '{print $2}' | sort -k1,1
}
trial 2 (temp 0.7) — fail — find: ‘md5’: No such file or directory
find_dupes() {
    dir="$1"
    find "$dir" -type f -exec md5 -r {} + | sort -k1,1 -k2,2 | uniq -w32 -d -f1 | awk '{print $2}' | sort -k1,1
}

qwen3.5-35b 75% overall↑ top

Served via llama.cpp Vulkan · 58.7 tok/s · 1.2 GB RAM · coding total 95/126

Bash — 16/24 (0.8 min / 2.2k tok)

count_matches — 0/3 passed
prompt sent to the model
Implement in bash: `count_matches <pattern> <file>`. Prints the number of lines in <file> matching <pattern> (fixed string). Prints 0 when nothing matches.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL count zzz
count_matches() {
  local pattern="$1"
  local file="$2"
  grep -F -c -- "$pattern" "$file" 2>/dev/null || echo 0
}
trial 1 (temp 0.7) — fail — FAIL count zzz
count_matches() {
  local pattern="$1"
  local file="$2"
  grep -F -c -- "$pattern" "$file" 2>/dev/null || echo 0
}
trial 2 (temp 0.7) — fail — FAIL count zzz
count_matches() {
  local pattern="$1"
  local file="$2"
  grep -F -c -- "$pattern" "$file" 2>/dev/null || echo 0
}
extract_urls — 0/3 passed
prompt sent to the model
Implement in bash: `extract_urls`. Reads stdin, prints every http:// or https:// URL found, one per line, in order of appearance. Nothing else.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]]+'
}
trial 1 (temp 0.7) — fail — https://c.net
extract_urls() {
  grep -oE 'https?://[^[:space:]]+'
}
trial 2 (temp 0.7) — fail — https://c.net
extract_urls() {
  grep -oE 'https?://[^[:space:]]+'
}
json_get — 1/3 passed
prompt sent to the model
Implement in bash: `json_get <key>`. Reads a flat JSON object on stdin and prints the string value of top-level <key>. python3 is available; jq is not.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 1 (temp 0.7) — fail — NameError: name 'key' is not defined
json_get() {
    local key="$1"
    python3 -c "
import json, sys
data = json.load(sys.stdin)
if key in data and isinstance(data[key], str):
    print(data[key])
"
}
trial 2 (temp 0.7) — fail — NameError: name 'key' is not defined
json_get() {
    local key="$1"
    python3 -c "
import json, sys
data = json.load(sys.stdin)
if key in data and isinstance(data[key], str):
    print(data[key])
"
}

Bash (hard) — 3/9 (0.9 min / 2.7k tok)

find_dupes — 0/3 passed
prompt sent to the model
Implement in bash: `find_dupes <dir>`. Finds groups of regular files under <dir> (recursive) with identical content (compare by MD5). Prints one group per line: space-separated paths, sorted, only groups of 2+ files. Groups sorted by first path. Must work on macOS (BSD userland: no GNU find -printf, no md5sum — use md5 -r).
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — solution.sh: line 18: md5: command not found
find_dupes() {
    local dir="${1:-.}"
    if [[ ! -d "$dir" ]]; then
        return 1
    fi

    # Use find to get regular files, compute md5, sort by hash then path
    # macOS md5 -r outputs: "MD5 (file) = hash" or "MD5(file) = hash" depending on version,
    # but typically "MD5 (file) = hash" for stdin or "MD5(file) = hash" for file arg.
    # We use md5 -r <file> which outputs: "MD5 (file) = hash"
    # We need to parse the hash.
    
    # Alternative: use md5 -q <file> for just the hash on some systems, but -r is more standard for BSD.
    # Actually, on macOS, `md5 -r file` outputs: "MD5 (file) = hash"
    # We can use sed to extract the hash.
    
    find "$dir" -type f -print0 | while IFS= read -r -d '' file; do
        hash=$(md5 -r "$file" | awk '{print $NF}')
        printf '%s\t%s\n' "$hash" "$file"
    done | sort -t$'\t' -k1,1 -k2,2 | \
    awk -F'\t' '
    {
        if ($1 == prev_hash) {
            if (count == 1) {
                # Start of a new group, print previous single file? No, we need 2+
                # We need to buffer.
            }
            paths[count] = $2
            count++
        } else {
            if (count >= 2) {
                # Print previous group
                for (i = 1; i < count; i++) {
                    printf "%s%s", paths[i], (i < count-1 ? " " : "\n")
                }
            }
            # Reset for new hash
            delete paths
            paths[1] = $2
            count = 1
            prev_hash = $1
        }
    }
    END {
        if (count >= 2) {
            for (i = 1; i < count; i++) {
                printf "%s%s", paths[i], (i < count-1 ? " " : "\n")
            }
        }
    }
    ' | sort
}
trial 1 (temp 0.7) — fail — solution.sh: line 18: md5: command not found
find_dupes() {
    local dir="${1:-.}"
    if [[ ! -d "$dir" ]]; then
        return 1
    fi

    # Use find to get regular files, compute md5, sort by hash then path
    # macOS md5 -r outputs: "MD5 (file) = hash" or "MD5(file) = hash" depending on version,
    # but typically "MD5 (file) = hash" for stdin or "MD5(file) = hash" for file arg.
    # We use md5 -r <file> which outputs: "MD5 (file) = hash"
    # We need to parse the hash.
    
    # Alternative: use md5 -q <file> for just the hash on some systems, but -r is more standard for BSD.
    # Actually, on macOS, `md5 -r file` outputs: "MD5 (file) = hash"
    # We can use sed to extract the hash.
    
    find "$dir" -type f -print0 | while IFS= read -r -d '' file; do
        hash=$(md5 -r "$file" | awk '{print $NF}')
        printf '%s\t%s\n' "$hash" "$file"
    done | sort -t$'\t' -k1,1 -k2,2 | \
    awk -F'\t' '
    {
        if ($1 == prev_hash) {
            if (count == 1) {
                # Start of a new group, print previous single file? No, we need 2+
                # We need to buffer.
            }
            paths[count] = $2
            count++
        } else {
            if (count >= 2) {
                # Print previous group
                for (i = 1; i < count; i++) {
                    printf "%s%s", paths[i], (i < count-1 ? " " : "\n")
                }
            }
            # Reset for new hash
            delete paths
            paths[1] = $2
            count = 1
            prev_hash = $1
        }
    }
    END {
        if (count >= 2) {
            for (i = 1; i < count; i++) {
                printf "%s%s", paths[i], (i < count-1 ? " " : "\n")
            }
        }
    }
    ' | sort
}
trial 2 (temp 0.7) — fail — solution.sh: line 18: md5: command not found
find_dupes() {
    local dir="${1:-.}"
    if [[ ! -d "$dir" ]]; then
        return 1
    fi

    # Use find to get regular files, compute md5, sort by hash then path
    # macOS md5 -r outputs: "MD5 (file) = hash" or "MD5 (stdin) = hash"
    # We need to parse the hash and the filename.
    # Using -print0 and sort -z to handle spaces/newlines in filenames safely.

    find "$dir" -type f -print0 | while IFS= read -r -d '' file; do
        # Compute MD5
        hash=$(md5 -r "$file" 2>/dev/null | awk '{print $NF}')
        if [[ -n "$hash" ]]; then
            printf '%s\t%s\n' "$hash" "$file"
        fi
    done | sort -t$'\t' -k1,1 -k2,2 | \
    awk -F'\t' '
    {
        hash = $1
        file = $2
        if (hash == prev_hash) {
            if (count == 1) {
                # Start of a new group, print previous single file as part of group
                # Actually, we need to buffer.
                # Let's restructure: collect files for current hash.
            }
            files[hash] = files[hash] " " file
            count[hash]++
        } else {
            # New hash, check if previous hash had duplicates
            if (count[prev_hash] > 1) {
                # Sort the files for the previous hash
                n = split(files[prev_hash], arr, " ")
                # Simple bubble sort for small groups or use asort if gawk, but we need portable
                # Since we need to output sorted paths, and we are processing sorted input,
                # the files for a hash are already sorted by path because of the outer sort.
                # So we just need to print them joined by space.
                print files[prev_hash]
            }
            prev_hash = hash
            files[hash] = file
            count[hash] = 1
        }
    }
    END {
        if (count[prev_hash] > 1) {
            print files[prev_hash]
        }
    }
    ' | sort
}
top_errors — 0/3 passed
prompt sent to the model
Implement in bash: `top_errors <logfile> <n>`. Prints the n most frequent ERROR signatures in <logfile>. A signature is the text after 'ERROR: ' with every run of digits replaced by '#'. Output one per line as '<count> <signature>', sorted by count descending, then signature ascending. Print nothing if there are no ERROR lines.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — 3 disk
top_errors() {
  local logfile="$1"
  local n="$2"
  
  if [[ -z "$logfile" || -z "$n" ]]; then
    return 1
  fi

  grep -o 'ERROR: .*$' "$logfile" 2>/dev/null | \
    sed 's/ERROR: //' | \
    sed 's/[0-9]\+/#/g' | \
    sort | \
    uniq -c | \
    sort -k1,1nr -k2,2 | \
    head -n "$n" | \
    awk '{print $1, $2}'
}
trial 1 (temp 0.7) — fail — 3 disk
top_errors() {
    local logfile="$1"
    local n="$2"
    
    if [[ -z "$logfile" || -z "$n" ]]; then
        return 1
    fi

    grep -o 'ERROR: [^[:space:]]*' "$logfile" 2>/dev/null | \
        sed 's/ERROR: //' | \
        sed 's/[0-9]\+/#/g' | \
        sort | \
        uniq -c | \
        sort -k1,1nr -k2,2 | \
        head -n "$n" | \
        awk '{print $1, $2}'
}
trial 2 (temp 0.7) — fail — 3 disk
top_errors() {
    local logfile="$1"
    local n="$2"
    
    if [[ -z "$logfile" || -z "$n" ]]; then
        return 1
    fi

    grep -o 'ERROR: [^[:space:]]*' "$logfile" 2>/dev/null | \
        sed 's/ERROR: //' | \
        sed 's/[0-9]\+/#/g' | \
        sort | \
        uniq -c | \
        sort -k1,1nr -k2,2 | \
        head -n "$n" | \
        awk '{print $1, $2}'
}

qwen3.6-35b 75% overall↑ top

Served via llama.cpp Vulkan · 58.5 tok/s · 1.2 GB RAM · coding total 94/126

Bash — 18/24 (0.8 min / 2.2k tok)

count_matches — 0/3 passed
prompt sent to the model
Implement in bash: `count_matches <pattern> <file>`. Prints the number of lines in <file> matching <pattern> (fixed string). Prints 0 when nothing matches.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL count foo
count_matches() {
    local pattern="$1"
    local file="$2"
    
    if [[ ! -f "$file" ]]; then
        echo 0
        return
    fi
    
    local count
    count=$(grep -c -F -x -- "$pattern" "$file" 2>/dev/null)
    
    if [[ -z "$count" ]]; then
        echo 0
    else
        echo "$count"
    fi
}
trial 1 (temp 0.7) — fail — FAIL count foo
count_matches() {
    local pattern="$1"
    local file="$2"
    
    if [[ ! -f "$file" ]]; then
        echo 0
        return
    fi
    
    local count
    count=$(grep -c -F -x -- "$pattern" "$file" 2>/dev/null)
    
    if [[ -z "$count" ]]; then
        echo 0
    else
        echo "$count"
    fi
}
trial 2 (temp 0.7) — fail — FAIL count foo
count_matches() {
    local pattern="$1"
    local file="$2"
    
    if [[ ! -f "$file" ]]; then
        echo 0
        return
    fi
    
    local count
    count=$(grep -c -F -x -- "$pattern" "$file" 2>/dev/null)
    
    if [[ -z "$count" ]]; then
        echo 0
    else
        echo "$count"
    fi
}
extract_urls — 0/3 passed
prompt sent to the model
Implement in bash: `extract_urls`. Reads stdin, prints every http:// or https:// URL found, one per line, in order of appearance. Nothing else.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]]+'
}
trial 1 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]]+'
}
trial 2 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]]+'
}

Bash (hard) — 3/9 (0.9 min / 2.8k tok)

find_dupes — 0/3 passed
prompt sent to the model
Implement in bash: `find_dupes <dir>`. Finds groups of regular files under <dir> (recursive) with identical content (compare by MD5). Prints one group per line: space-separated paths, sorted, only groups of 2+ files. Groups sorted by first path. Must work on macOS (BSD userland: no GNU find -printf, no md5sum — use md5 -r).
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL got:
find_dupes() {
    local dir="${1:-.}"
    
    # Use find to get all regular files, then compute md5 for each
    # We need to handle filenames with spaces/newlines carefully
    # Using null-delimited output from find and processing with while read
    
    declare -A hash_to_files
    
    while IFS= read -r -d '' file; do
        # Compute MD5 using md5 -r (BSD style)
        # md5 -r outputs: "MD5 (filename) = hash" or "hash  filename"
        # On macOS, md5 -r outputs: "MD5 (file) = hash"
        local hash
        hash=$(md5 -r "$file" 2>/dev/null | awk '{print $1}')
        
        if [[ -n "$hash" ]]; then
            if [[ -v hash_to_files["$hash"] ]]; then
                hash_to_files["$hash"]="${hash_to_files["$hash"]}"$'\n'"$file"
            else
                hash_to_files["$hash"]="$file"
            fi
        fi
    done < <(find "$dir" -type f -print0)
    
    # Collect groups with 2+ files
    local groups=()
    for hash in "${!hash_to_files[@]}"; do
        local files_str="${hash_to_files["$hash"]}"
        # Count number of files
        local count
        count=$(echo "$files_str" | wc -l)
        if [[ "$count" -ge 2 ]]; then
            # Sort the files in this group
            local sorted_files
            sorted_files=$(echo "$files_str" | sort)
            # Convert newlines to spaces
            local space_separated
            space_separated=$(echo "$sorted_files" | tr '\n' ' ' | sed 's/ $//')
            groups+=("$space_separated")
        fi
    done
    
    # Sort groups by first path
    # Each group is a line of space-separated paths
    # We need to sort these lines based on the first field
    if [[ ${#groups[@]} -gt 0 ]]; then
        printf '%s\n' "${groups[@]}" | sort -t ' ' -k1,1
    fi
}
trial 1 (temp 0.7) — fail — FAIL got:
find_dupes() {
    local dir="${1:-.}"
    
    # Use find to get all regular files, then compute md5 for each
    # We need to handle filenames with spaces/newlines carefully
    # Using null-delimited output from find and processing with while read
    
    declare -A md5_to_files
    
    while IFS= read -r -d '' file; do
        # Compute MD5 using md5 -r (BSD style)
        # md5 -r outputs: "MD5 (filename) = hash" or "MD5: hash" depending on version
        # On macOS, md5 -r outputs: "MD5 (file) = hash"
        local hash
        hash=$(md5 -r "$file" 2>/dev/null | awk '{print $NF}')
        
        if [[ -n "$hash" ]]; then
            if [[ -n "${md5_to_files[$hash]}" ]]; then
                md5_to_files[$hash]+=$'\n'"$file"
            else
                md5_to_files[$hash]="$file"
            fi
        fi
    done < <(find "$dir" -type f -print0)
    
    # Collect groups with 2+ files
    local groups=()
    for hash in "${!md5_to_files[@]}"; do
        local files_str="${md5_to_files[$hash]}"
        # Count number of files
        local count
        count=$(echo "$files_str" | wc -l)
        if [[ "$count" -ge 2 ]]; then
            # Sort the files in this group
            local sorted_files
            sorted_files=$(echo "$files_str" | sort)
            # Convert newlines to spaces
            local space_separated
            space_separated=$(echo "$sorted_files" | tr '\n' ' ' | sed 's/ $//')
            groups+=("$space_separated")
        fi
    done
    
    # Sort groups by first path
    # Each group is a line of space-separated paths
    # We need to sort these lines by the first field
    if [[ ${#groups[@]} -gt 0 ]]; then
        printf '%s\n' "${groups[@]}" | sort -t ' ' -k1,1
    fi
}
trial 2 (temp 0.7) — fail — FAIL got:
find_dupes() {
    local dir="${1:-.}"
    
    # Use find to get all regular files, then compute md5 for each
    # We need to handle filenames with spaces/newlines carefully
    # Using null-delimited output from find and processing with while read
    
    declare -A md5_to_files
    
    while IFS= read -r -d '' file; do
        # Compute MD5 using md5 -r (BSD style)
        # md5 -r outputs: "MD5 (filename) = hash" or "MD5: hash" depending on version
        # On macOS, md5 -r outputs: "MD5 (file) = hash"
        local hash
        hash=$(md5 -r "$file" 2>/dev/null | awk '{print $NF}')
        
        if [[ -n "$hash" ]]; then
            if [[ -n "${md5_to_files[$hash]}" ]]; then
                md5_to_files[$hash]+=$'\n'"$file"
            else
                md5_to_files[$hash]="$file"
            fi
        fi
    done < <(find "$dir" -type f -print0)
    
    # Collect groups with 2+ files
    local groups=()
    for hash in "${!md5_to_files[@]}"; do
        local files_str="${md5_to_files[$hash]}"
        # Count number of files
        local count
        count=$(echo "$files_str" | wc -l)
        if [[ "$count" -ge 2 ]]; then
            # Sort the files in this group
            local sorted_files
            sorted_files=$(echo "$files_str" | sort)
            # Convert newlines to spaces
            local space_separated
            space_separated=$(echo "$sorted_files" | tr '\n' ' ' | sed 's/ $//')
            groups+=("$space_separated")
        fi
    done
    
    # Sort groups by first path
    # Each group is a line of space-separated paths
    # We need to sort these lines by the first field
    if [[ ${#groups[@]} -gt 0 ]]; then
        printf '%s\n' "${groups[@]}" | sort -t ' ' -k1,1
    fi
}
top_errors — 0/3 passed
prompt sent to the model
Implement in bash: `top_errors <logfile> <n>`. Prints the n most frequent ERROR signatures in <logfile>. A signature is the text after 'ERROR: ' with every run of digits replaced by '#'. Output one per line as '<count> <signature>', sorted by count descending, then signature ascending. Print nothing if there are no ERROR lines.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — sed: -e expression #1, char 12: unterminated `s' command
top_errors() {
    local logfile="$1"
    local n="$2"

    if [[ ! -f "$logfile" ]]; then
        return
    fi

    grep -oP 'ERROR: \K.*' "$logfile" 2>/dev/null | \
    sed 's/[0-9]\+#/g' | \
    sort | \
    uniq -c | \
    sort -k1,1nr -k2,2 | \
    head -n "$n" | \
    awk '{print $1, $2}'
}
trial 1 (temp 0.7) — fail — sed: -e expression #1, char 12: unterminated `s' command
top_errors() {
    local logfile="$1"
    local n="$2"

    if [[ ! -f "$logfile" ]]; then
        return
    fi

    grep -oP 'ERROR: \K.*' "$logfile" 2>/dev/null | \
    sed 's/[0-9]\+#/g' | \
    sort | \
    uniq -c | \
    sort -k1,1nr -k2,2 | \
    head -n "$n" | \
    awk '{print $1, $2}'
}
trial 2 (temp 0.7) — fail — sed: -e expression #1, char 12: unterminated `s' command
top_errors() {
    local logfile="$1"
    local n="$2"

    if [[ ! -f "$logfile" ]]; then
        return
    fi

    grep -oP 'ERROR: \K.*' "$logfile" 2>/dev/null | \
    sed 's/[0-9]\+#/g' | \
    sort | \
    uniq -c | \
    sort -k1,1nr -k2,2 | \
    head -n "$n" | \
    awk '{print $1, $2}'
}

qwen3.5-122b-a10b 74% overall↑ top

Served via llama.cpp Vulkan · 22.2 tok/s · 2.4 GB RAM · coding total 93/126

Bash — 15/24 (1.5 min / 1.8k tok)

count_matches — 0/3 passed
prompt sent to the model
Implement in bash: `count_matches <pattern> <file>`. Prints the number of lines in <file> matching <pattern> (fixed string). Prints 0 when nothing matches.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL count zzz
count_matches() {
    local pattern="$1"
    local file="$2"
    grep -F -c "$pattern" "$file" 2>/dev/null || echo 0
}
trial 1 (temp 0.7) — fail — FAIL count zzz
count_matches() {
    local pattern="$1"
    local file="$2"
    grep -F -c "$pattern" "$file" 2>/dev/null || echo 0
}
trial 2 (temp 0.7) — fail — FAIL count zzz
count_matches() {
    local pattern="$1"
    local file="$2"
    grep -F -c "$pattern" "$file" 2>/dev/null || echo 0
}
retry3 — 0/3 passed
prompt sent to the model
Implement in bash: `retry3 <cmd...>`. Runs the command; if it fails, retries up to 3 total attempts. Exits 0 if any attempt succeeds, otherwise exits with the last attempt's exit code.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL false succeeded
retry3() {
    local cmd=("$@")
    local max_attempts=3
    local attempt=1

    while [ $attempt -le $max_attempts ]; do
        if "${cmd[@]}"; then
            return 0
        fi
        ((attempt++))
    done

    return $?
}
trial 1 (temp 0.7) — fail — FAIL false succeeded
retry3() {
    local cmd=("$@")
    local max_attempts=3
    local attempt=1

    while [ $attempt -le $max_attempts ]; do
        if "${cmd[@]}"; then
            return 0
        fi
        ((attempt++))
    done

    return $?
}
trial 2 (temp 0.7) — fail — FAIL false succeeded
retry3() {
    local cmd=("$@")
    local max_attempts=3
    local attempt=1

    while [ $attempt -le $max_attempts ]; do
        if "${cmd[@]}"; then
            return 0
        fi
        ((attempt++))
    done

    return $?
}
extract_urls — 0/3 passed
prompt sent to the model
Implement in bash: `extract_urls`. Reads stdin, prints every http:// or https:// URL found, one per line, in order of appearance. Nothing else.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — https://c.net
extract_urls() {
  grep -oE 'https?://[^[:space:]<>"'\'']+'
}
trial 1 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]<>"'\'']+'
}
trial 2 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]<>"'\'']+'
}

Bash (hard) — 3/9 (1.8 min / 2.3k tok)

find_dupes — 0/3 passed
prompt sent to the model
Implement in bash: `find_dupes <dir>`. Finds groups of regular files under <dir> (recursive) with identical content (compare by MD5). Prints one group per line: space-separated paths, sorted, only groups of 2+ files. Groups sorted by first path. Must work on macOS (BSD userland: no GNU find -printf, no md5sum — use md5 -r).
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL got:
find_dupes() {
    local dir="$1"
    local tmpfile
    tmpfile=$(mktemp)

    trap 'rm -f "$tmpfile"' EXIT

    # Find regular files, compute MD5, output "hash  path"
    # Using 'md5 -r' for BSD/macOS compatibility
    find "$dir" -type f -exec sh -c '
        for f do
            hash=$(md5 -r "$f" 2>/dev/null | cut -d" " -f1)
            if [ -n "$hash" ]; then
                printf "%s\t%s\n" "$hash" "$f"
            fi
        done
    ' sh {} + > "$tmpfile"

    # Sort by hash, then by path
    sort -t$'\t' -k1,1 -k2,2 "$tmpfile" | awk -F'\t' '
    {
        if ($1 == prev_hash) {
            paths = paths " " $2
            count++
        } else {
            if (count >= 2) {
                print paths
            }
            prev_hash = $1
            paths = $2
            count = 1
        }
    }
    END {
        if (count >= 2) {
            print paths
        }
    }'
}
trial 1 (temp 0.7) — fail — FAIL got:
find_dupes() {
    local dir="$1"
    if [[ -z "$dir" ]]; then
        echo "Usage: find_dupes <dir>" >&2
        return 1
    fi

    local tmpfile
    tmpfile=$(mktemp)
    trap 'rm -f "$tmpfile"' EXIT

    # Find regular files, compute MD5, format as "hash  path"
    # Using -print0 and read -d '' to handle filenames with spaces/newlines
    find "$dir" -type f -print0 | while IFS= read -r -d '' file; do
        # md5 -r outputs "hash  filename"
        hash=$(md5 -r "$file" 2>/dev/null | cut -d' ' -f1)
        if [[ -n "$hash" ]]; then
            printf '%s\t%s\n' "$hash" "$file"
        fi
    done > "$tmpfile"

    # Sort by hash, then by path to group duplicates and ensure consistent ordering
    sort -t$'\t' -k1,1 -k2,2 "$tmpfile" | awk -F'\t' '
    {
        hash = $1
        path = $2
        if (hash == prev_hash) {
            paths[hash] = paths[hash] " " path
            count[hash]++
        } else {
            if (count[prev_hash] > 1) {
                print paths[prev_hash]
            }
            prev_hash = hash
            paths[hash] = path
            count[hash] = 1
        }
    }
    END {
        if (count[prev_hash] > 1) {
            print paths[prev_hash]
        }
    }' | sort
}
trial 2 (temp 0.7) — fail — FAIL got:
find_dupes() {
    local dir="$1"
    local tmpfile
    tmpfile=$(mktemp)

    trap 'rm -f "$tmpfile"' EXIT

    # Find regular files, compute MD5, output "hash  path"
    # Using 'md5 -r' for BSD/macOS compatibility
    find "$dir" -type f -exec sh -c '
        for f do
            hash=$(md5 -r "$f" 2>/dev/null | cut -d" " -f1)
            if [ -n "$hash" ]; then
                printf "%s\t%s\n" "$hash" "$f"
            fi
        done
    ' sh {} + > "$tmpfile"

    # Sort by hash, then by path
    sort -t$'\t' -k1,1 -k2,2 "$tmpfile" | awk -F'\t' '
    {
        if ($1 == prev_hash) {
            paths = paths " " $2
            count++
        } else {
            if (count >= 2) {
                print paths
            }
            prev_hash = $1
            paths = $2
            count = 1
        }
    }
    END {
        if (count >= 2) {
            print paths
        }
    }'
}
top_errors — 0/3 passed
prompt sent to the model
Implement in bash: `top_errors <logfile> <n>`. Prints the n most frequent ERROR signatures in <logfile>. A signature is the text after 'ERROR: ' with every run of digits replaced by '#'. Output one per line as '<count> <signature>', sorted by count descending, then signature ascending. Print nothing if there are no ERROR lines.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — 3 disk
top_errors() {
    local logfile="$1"
    local n="$2"

    if [[ ! -f "$logfile" ]]; then
        return 0
    fi

    grep 'ERROR: ' "$logfile" 2>/dev/null | \
    sed 's/.*ERROR: //' | \
    sed 's/[0-9]\+/#/g' | \
    sort | \
    uniq -c | \
    sort -k1,1nr -k2,2 | \
    head -n "$n" | \
    awk '{print $1, $2}'
}
trial 1 (temp 0.7) — fail — 3 disk
top_errors() {
    local logfile="$1"
    local n="$2"

    if [[ ! -f "$logfile" ]]; then
        return 0
    fi

    grep 'ERROR: ' "$logfile" 2>/dev/null | \
    sed 's/.*ERROR: //' | \
    sed 's/[0-9]\+/#/g' | \
    sort | \
    uniq -c | \
    sort -k1,1nr -k2,2 | \
    head -n "$n" | \
    awk '{print $1, $2}'
}
trial 2 (temp 0.7) — fail — 3 disk
top_errors() {
    local logfile="$1"
    local n="$2"

    if [[ ! -f "$logfile" ]]; then
        return 0
    fi

    grep 'ERROR: ' "$logfile" 2>/dev/null | \
    sed 's/.*ERROR: //' | \
    sed 's/[0-9]\+/#/g' | \
    sort | \
    uniq -c | \
    sort -k1,1nr -k2,2 | \
    head -n "$n" | \
    awk '{print $1, $2}'
}

qwen3.5-27b 74% overall↑ top

Served via llama.cpp Vulkan · 12.5 tok/s · 2.6 GB RAM · coding total 93/126

Bash — 15/24 (2.5 min / 1.5k tok)

count_matches — 0/3 passed
prompt sent to the model
Implement in bash: `count_matches <pattern> <file>`. Prints the number of lines in <file> matching <pattern> (fixed string). Prints 0 when nothing matches.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL count zzz
count_matches() {
    local pattern="$1"
    local file="$2"
    grep -F -c -- "$pattern" "$file" 2>/dev/null || echo 0
}
trial 1 (temp 0.7) — fail — FAIL count zzz
count_matches() {
    local pattern="$1"
    local file="$2"
    grep -F -c -- "$pattern" "$file" 2>/dev/null || echo 0
}
trial 2 (temp 0.7) — fail — FAIL count zzz
count_matches() {
    local pattern="$1"
    local file="$2"
    grep -F -c -- "$pattern" "$file" 2>/dev/null || echo 0
}
retry3 — 0/3 passed
prompt sent to the model
Implement in bash: `retry3 <cmd...>`. Runs the command; if it fails, retries up to 3 total attempts. Exits 0 if any attempt succeeds, otherwise exits with the last attempt's exit code.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL false succeeded
retry3() {
    local attempts=3
    local exit_code=1
    while (( attempts > 0 )); do
        if "$@"; then
            return 0
        fi
        exit_code=$?
        (( attempts-- ))
    done
    return $exit_code
}
trial 1 (temp 0.7) — fail — FAIL false succeeded
retry3() {
    local attempts=3
    local exit_code=1
    while (( attempts > 0 )); do
        if "$@"; then
            return 0
        fi
        exit_code=$?
        (( attempts-- ))
    done
    return $exit_code
}
trial 2 (temp 0.7) — fail — FAIL false succeeded
retry3() {
    local attempts=3
    local exit_code=1
    while (( attempts > 0 )); do
        if "$@"; then
            return 0
        fi
        exit_code=$?
        (( attempts-- ))
    done
    return $exit_code
}
extract_urls — 0/3 passed
prompt sent to the model
Implement in bash: `extract_urls`. Reads stdin, prints every http:// or https:// URL found, one per line, in order of appearance. Nothing else.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]"<>()]+'
}
trial 1 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]"<>()]+'
}
trial 2 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]"<>()]+'
}

Bash (hard) — 6/9 (4.6 min / 3.3k tok)

find_dupes — 0/3 passed
prompt sent to the model
Implement in bash: `find_dupes <dir>`. Finds groups of regular files under <dir> (recursive) with identical content (compare by MD5). Prints one group per line: space-separated paths, sorted, only groups of 2+ files. Groups sorted by first path. Must work on macOS (BSD userland: no GNU find -printf, no md5sum — use md5 -r).
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — solution.sh: line 12: md5: command not found
find_dupes() {
    local dir="$1"
    local tmpfile
    tmpfile=$(mktemp)
    trap "rm -f '$tmpfile'" EXIT

    # Find regular files, compute MD5, output "hash path"
    # macOS 'find' does not support -printf, so we use -exec
    # macOS 'md5' uses -r for recursive/batch mode but here we pipe filenames
    # We use a loop to handle filenames with spaces/newlines safely
    while IFS= read -r -d '' file; do
        hash=$(md5 -q "$file" | awk '{print $1}')
        printf '%s\t%s\n' "$hash" "$file"
    done < <(find "$dir" -type f -print0) > "$tmpfile"

    # Sort by hash then path
    sort -t$'\t' -k1,1 -k2,2 "$tmpfile" | awk -F'\t' '
    {
        hash = $1
        path = $2
        if (hash == prev_hash) {
            paths[hash] = paths[hash] " " path
            count[hash]++
        } else {
            if (count[prev_hash] >= 2) {
                # Sort paths within the group
                n = split(paths[prev_hash], arr, " ")
                # Simple bubble sort for paths (awk limitation)
                for (i = 1; i <= n; i++) {
                    for (j = i + 1; j <= n; j++) {
                        if (arr[i] > arr[j]) {
                            tmp = arr[i]
                            arr[i] = arr[j]
                            arr[j] = tmp
                        }
                    }
                }
                # Reconstruct sorted string
                sorted_str = arr[1]
                for (i = 2; i <= n; i++) {
                    sorted_str = sorted_str " " arr[i]
                }
                print sorted_str
            }
            prev_hash = hash
            paths[hash] = path
            count[hash] = 1
        }
    }
    END {
        if (count[prev_hash] >= 2) {
            n = split(paths[prev_hash], arr, " ")
            for (i = 1; i <= n; i++) {
                for (j = i + 1; j <= n; j++) {
                    if (arr[i] > arr[j]) {
                        tmp = arr[i]
                        arr[i] = arr[j]
                        arr[j] = tmp
                    }
                }
            }
            sorted_str = arr[1]
            for (i = 2; i <= n; i++) {
                sorted_str = sorted_str " " arr[i]
            }
            print sorted_str
        }
    }' | sort
}
trial 1 (temp 0.7) — fail — solution.sh: line 12: md5: command not found
find_dupes() {
    local dir="$1"
    local tmpfile
    tmpfile=$(mktemp)
    trap "rm -f '$tmpfile'" EXIT

    # Find regular files, compute MD5, output "hash path"
    # macOS 'find' does not support -printf, so we use -exec
    # macOS 'md5' uses -r for recursive/batch mode but here we pipe filenames
    # We use a loop to handle filenames with spaces/newlines safely
    while IFS= read -r -d '' file; do
        hash=$(md5 -q "$file" | awk '{print $1}')
        printf '%s\t%s\n' "$hash" "$file"
    done < <(find "$dir" -type f -print0) > "$tmpfile"

    # Sort by hash then path
    sort -t$'\t' -k1,1 -k2,2 "$tmpfile" | awk -F'\t' '
    {
        hash = $1
        path = $2
        if (hash == prev_hash) {
            paths[hash] = paths[hash] " " path
            count[hash]++
        } else {
            if (count[prev_hash] >= 2) {
                # Sort paths within the group
                n = split(paths[prev_hash], arr, " ")
                # Simple bubble sort for paths (awk limitation)
                for (i = 1; i <= n; i++) {
                    for (j = i + 1; j <= n; j++) {
                        if (arr[i] > arr[j]) {
                            tmp = arr[i]
                            arr[i] = arr[j]
                            arr[j] = tmp
                        }
                    }
                }
                # Reconstruct sorted string
                sorted_str = arr[1]
                for (i = 2; i <= n; i++) {
                    sorted_str = sorted_str " " arr[i]
                }
                print sorted_str
            }
            prev_hash = hash
            paths[hash] = path
            count[hash] = 1
        }
    }
    END {
        if (count[prev_hash] >= 2) {
            n = split(paths[prev_hash], arr, " ")
            for (i = 1; i <= n; i++) {
                for (j = i + 1; j <= n; j++) {
                    if (arr[i] > arr[j]) {
                        tmp = arr[i]
                        arr[i] = arr[j]
                        arr[j] = tmp
                    }
                }
            }
            sorted_str = arr[1]
            for (i = 2; i <= n; i++) {
                sorted_str = sorted_str " " arr[i]
            }
            print sorted_str
        }
    }' | sort
}
trial 2 (temp 0.7) — fail — solution.sh: line 12: md5: command not found
find_dupes() {
    local dir="$1"
    local tmpfile
    tmpfile=$(mktemp)
    trap "rm -f '$tmpfile'" EXIT

    # Find regular files, compute MD5, output "hash path"
    # macOS 'find' does not support -printf, so we use -exec
    # macOS 'md5' uses -r for recursive/batch mode but here we pipe filenames
    # We use a loop to handle filenames with spaces/newlines safely
    while IFS= read -r -d '' file; do
        hash=$(md5 -q "$file" | awk '{print $1}')
        printf '%s\t%s\n' "$hash" "$file"
    done < <(find "$dir" -type f -print0) > "$tmpfile"

    # Sort by hash then path to group duplicates
    sort -t$'\t' -k1,1 -k2,2 "$tmpfile" | awk -F'\t' '
    {
        hash = $1
        path = $2
        if (hash == prev_hash) {
            paths[hash] = paths[hash] " " path
            count[hash]++
        } else {
            if (count[prev_hash] >= 2) {
                # Sort paths within the group
                n = split(paths[prev_hash], arr, " ")
                # Simple bubble sort for paths (awk limitation)
                for (i = 1; i <= n; i++) {
                    for (j = i + 1; j <= n; j++) {
                        if (arr[i] > arr[j]) {
                            tmp = arr[i]
                            arr[i] = arr[j]
                            arr[j] = tmp
                        }
                    }
                }
                # Reconstruct sorted string
                sorted_str = arr[1]
                for (i = 2; i <= n; i++) {
                    sorted_str = sorted_str " " arr[i]
                }
                # Store for final sorting
                groups[++group_count] = sorted_str
                first_paths[group_count] = arr[1]
            }
            prev_hash = hash
            paths[hash] = path
            count[hash] = 1
        }
    }
    END {
        if (count[prev_hash] >= 2) {
            n = split(paths[prev_hash], arr, " ")
            for (i = 1; i <= n; i++) {
                for (j = i + 1; j <= n; j++) {
                    if (arr[i] > arr[j]) {
                        tmp = arr[i]
                        arr[i] = arr[j]
                        arr[j] = tmp
                    }
                }
            }
            sorted_str = arr[1]
            for (i = 2; i <= n; i++) {
                sorted_str = sorted_str " " arr[i]
            }
            groups[++group_count] = sorted_str
            first_paths[group_count] = arr[1]
        }
        # Sort groups by first path
        for (i = 1; i <= group_count; i++) {
            for (j = i + 1; j <= group_count; j++) {
                if (first_paths[i] > first_paths[j]) {
                    tmp = groups[i]; groups[i] = groups[j]; groups[j] = tmp
                    tmp = first_paths[i]; first_paths[i] = first_paths[j]; first_paths[j] = tmp
                }
            }
        }
        for (i = 1; i <= group_count; i++) {
            print groups[i]
        }
    }'
}

k2-horizon 36B-A4B 72% overall↑ top

Served via llama.cpp Vulkan · 48.3 tok/s · 0.4 GB RAM · coding total 91/126

Bash — 16/24 (0.6 min / 1.5k tok)

retry3 — 1/3 passed
prompt sent to the model
Implement in bash: `retry3 <cmd...>`. Runs the command; if it fails, retries up to 3 total attempts. Exits 0 if any attempt succeeds, otherwise exits with the last attempt's exit code.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL false succeeded
retry3() {
    local attempt
    for attempt in 1 2 3; do
        if "$@"; then
            return 0
        fi
        if [ "$attempt" -eq 3 ]; then
            return $?
        fi
    done
}
trial 2 (temp 0.7) — fail — FAIL false succeeded
retry3() {
    local attempt
    for attempt in 1 2 3; do
        if "$@"; then
            return 0
        fi
        if [ "$attempt" -eq 3 ]; then
            return $?
        fi
    done
}
extract_urls — 0/3 passed
prompt sent to the model
Implement in bash: `extract_urls`. Reads stdin, prints every http:// or https:// URL found, one per line, in order of appearance. Nothing else.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]]+' || true
}
trial 1 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]]+' || true
}
trial 2 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]]+' || true
}
json_get — 0/3 passed
prompt sent to the model
Implement in bash: `json_get <key>`. Reads a flat JSON object on stdin and prints the string value of top-level <key>. python3 is available; jq is not.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — KeyError: '$1'
json_get() {
    python3 -c 'import json,sys; print(json.load(sys.stdin)["$1"])'
}
trial 1 (temp 0.7) — fail — KeyError: '$1'
json_get() {
    python3 -c 'import json,sys; print(json.load(sys.stdin)["$1"])'
}
trial 2 (temp 0.7) — fail — KeyError: '$1'
json_get() {
    python3 -c 'import json,sys; print(json.load(sys.stdin)["$1"])'
}

Bash (hard) — 3/9 (0.7 min / 1.8k tok)

find_dupes — 0/3 passed
prompt sent to the model
Implement in bash: `find_dupes <dir>`. Finds groups of regular files under <dir> (recursive) with identical content (compare by MD5). Prints one group per line: space-separated paths, sorted, only groups of 2+ files. Groups sorted by first path. Must work on macOS (BSD userland: no GNU find -printf, no md5sum — use md5 -r).
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL got:
find_dupes() {
    local dir="$1"
    [ -d "$dir" ] || return 1

    local tmpfile
    tmpfile=$(mktemp "${TMPDIR:-/tmp}/find_dupes.XXXXXX") || return 1
    trap 'rm -f "$tmpfile"' RETURN

    find "$dir" -type f -print0 2>/dev/null | while IFS= read -r -d '' f; do
        md5 -r "$f" 2>/dev/null | awk -v path="$f" '{print $1 " " path}' >> "$tmpfile"
    done

    awk '{ if (length($1) == 32) { hash[$1] = hash[$1] " " $2 } } END { for (h in hash) { if (split(hash[h], a, " ") > 1) { n = split(hash[h], a, " "); asort(a); line = a[1]; for (i = 2; i <= n; i++) line = line " " a[i]; print line } } }' "$tmpfile" | sort
}
trial 1 (temp 0.7) — fail — FAIL got:
find_dupes() {
    local dir="$1"
    [ -d "$dir" ] || return 1

    # Collect regular files and compute MD5 hashes
    local tmpfile
    tmpfile=$(mktemp)
    trap 'rm -f "$tmpfile"' RETURN

    # Use find to list regular files, then compute md5 for each
    while IFS= read -r -d '' file; do
        # md5 -r outputs "<hash>  <file>"
        md5 -r "$file" >> "$tmpfile" 2>/dev/null
    done < <(find "$dir" -type f -print0)

    # Sort by hash, then group identical hashes
    sort "$tmpfile" | awk '
        {
            hash = $1
            path = substr($0, index($0, $2))
            # Remove leading spaces from path
            sub(/^  /, "", path)
            if (hash == prev_hash) {
                group[++count] = path
            } else {
                if (count > 1) {
                    # Sort group and print
                    n = asorti(group, sorted)
                    for (i = 1; i <= n; i++) {
                        printf "%s%s", sorted[i], (i < n ? " " : "\n")
                    }
                }
                count = 1
                group[1] = path
            }
            prev_hash = hash
        }
        END {
            if (count > 1) {
                n = asorti(group, sorted)
                for (i = 1; i <= n; i++) {
                    printf "%s%s", sorted[i], (i < n ? " " : "\n")
                }
            }
        }
    '
}
trial 2 (temp 0.7) — fail — FAIL got:
find_dupes() {
    local dir="$1"
    [ -d "$dir" ] || return 1

    local tmpfile
    tmpfile=$(mktemp "${TMPDIR:-/tmp}/find_dupes.XXXXXX") || return 1
    trap 'rm -f "$tmpfile"' RETURN

    # Collect regular files, compute MD5, store "hash<TAB>path"
    find "$dir" -type f -print0 2>/dev/null | while IFS= read -r -d '' f; do
        hash=$(md5 -q "$f" 2>/dev/null) || continue
        printf '%s\t%s\n' "$hash" "$f"
    done > "$tmpfile"

    # Group by hash, keep only groups with 2+ files
    awk -F '\t' '
        { files[$1] = files[$1] " " $2 }
        END {
            for (h in files) {
                if (split(files[h], arr, " ") > 1) {
                    # Sort paths within group
                    n = split(files[h], arr, " ")
                    for (i = 1; i < n; i++)
                        for (j = i + 1; j <= n; j++)
                            if (arr[j] < arr[i]) { t = arr[i]; arr[i] = arr[j]; arr[j] = t }
                    line = arr[1]
                    for (i = 2; i <= n; i++) line = line " " arr[i]
                    print line
                }
            }
        }
    ' "$tmpfile" | sort
}
backup_rotate — 0/3 passed
prompt sent to the model
Implement in bash: `backup_rotate <dir> <keep>`. In <dir>, deletes all but the <keep> newest files matching backup-*.tar.gz (newest = lexicographically greatest names). Prints each deleted file's name (not path), one per line, oldest first. Deletes nothing if there are <= <keep> backups (prints nothing).
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — backup-20260101-120000.tar.gz
backup_rotate() {
    local dir="$1" keep="$2"
    local files
    files=$(find "$dir" -maxdepth 1 -type f -name 'backup-*.tar.gz' -printf '%f\n' | sort -r)
    local count
    count=$(printf '%s\n' "$files" | grep -c .)
    if [ "$count" -le "$keep" ]; then
        return 0
    fi
    local to_delete=$((count - keep))
    printf '%s\n' "$files" | tail -n "$to_delete" | while IFS= read -r f; do
        rm -f "$dir/$f"
        printf '%s\n' "$f"
    done
}
trial 1 (temp 0.7) — fail — backup-20260101-120000.tar.gz
backup_rotate() {
    local dir="$1" keep="$2"
    local files
    files=$(find "$dir" -maxdepth 1 -type f -name 'backup-*.tar.gz' -printf '%f\n' | sort -r)
    local count
    count=$(printf '%s\n' "$files" | grep -c .)
    if [ "$count" -le "$keep" ]; then
        return 0
    fi
    local to_delete=$((count - keep))
    printf '%s\n' "$files" | tail -n "$to_delete" | while IFS= read -r f; do
        rm -f "$dir/$f"
        printf '%s\n' "$f"
    done
}
trial 2 (temp 0.7) — fail — backup-20260101-120000.tar.gz
backup_rotate() {
    local dir="$1" keep="$2"
    local files
    files=$(find "$dir" -maxdepth 1 -type f -name 'backup-*.tar.gz' -printf '%f\n' | sort -r)
    local count
    count=$(printf '%s\n' "$files" | grep -c .)
    if [ "$count" -le "$keep" ]; then
        return 0
    fi
    local to_delete=$((count - keep))
    printf '%s\n' "$files" | tail -n "$to_delete" | while IFS= read -r f; do
        rm -f "$dir/$f"
        printf '%s\n' "$f"
    done
}

qwen3-coder-30b 69% overall↑ top

Served via llama.cpp Vulkan · 85.0 tok/s · 0.3 GB RAM · coding total 87/126

Bash — 14/24 (0.4 min / 1.7k tok)

count_matches — 0/3 passed
prompt sent to the model
Implement in bash: `count_matches <pattern> <file>`. Prints the number of lines in <file> matching <pattern> (fixed string). Prints 0 when nothing matches.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL count foo
count_matches() {
    local pattern="$1"
    local file="$2"
    
    if [[ -f "$file" ]]; then
        grep -c "^$pattern$" "$file" 2>/dev/null | head -1
    else
        echo "0"
    fi
}
trial 1 (temp 0.7) — fail — FAIL count foo
count_matches() {
    local pattern="$1"
    local file="$2"
    
    if [[ -f "$file" ]]; then
        grep -c "^$pattern$" "$file" 2>/dev/null || echo 0
    else
        echo 0
    fi
}
trial 2 (temp 0.7) — fail — FAIL count foo
count_matches() {
    local pattern="$1"
    local file="$2"
    
    if [[ -f "$file" ]]; then
        grep -c "^$pattern$" "$file" 2>/dev/null || echo 0
    else
        echo 0
    fi
}
extract_urls — 0/3 passed
prompt sent to the model
Implement in bash: `extract_urls`. Reads stdin, prints every http:// or https:// URL found, one per line, in order of appearance. Nothing else.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]]+' | grep -vE '^[^/]*$'
}
trial 1 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]]+' | grep -vE '^[^/]*$'
}
trial 2 (temp 0.7) — fail — https://c.net
extract_urls() {
    grep -oE 'https?://[^[:space:]]+' | grep -vE '^[^/]*$'
}
rotate — 2/3 passed
prompt sent to the model
Implement in bash: `rotate <file>`. Rotates logs one level: <file>.1 becomes <file>.2, then <file> becomes <file>.1. If <file>.1 does not exist, just rename <file> to <file>.1.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 1 (temp 0.7) — fail — cat: log.2: No such file or directory
rotate() {
    local file="$1"
    local backup="${file}.1"
    
    if [[ -f "$backup" ]]; then
        local i=9
        while [[ $i -gt 1 ]]; do
            local prev="{$file}.${i}"
            local next="{$file}.${((i+1))"
            if [[ -f "$prev" ]]; then
                mv "$prev" "$next"
            fi
            ((i--))
        done
        mv "$file" "$backup"
    else
        mv "$file" "$backup"
    fi
}
csv_col — 0/3 passed
prompt sent to the model
Implement in bash: `csv_col <name>`. Reads a CSV from stdin (first line is a header). Prints the values of the column named <name>, one per line, in order.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL got:
csv_col() {
    local col_name="$1"
    local col_num=$(head -n1 | tr ',' '\n' | grep -n "^$col_name$" | cut -d: -f1)
    if [ -z "$col_num" ]; then
        return 1
    fi
    cut -d',' -f"$col_num" | tail -n +2
}
trial 1 (temp 0.7) — fail — FAIL got:
csv_col() {
    local col_name="$1"
    local col_num=$(head -n1 | tr ',' '\n' | grep -n "^$col_name$" | cut -d: -f1)
    if [ -z "$col_num" ]; then
        return 1
    fi
    cut -d',' -f"$col_num" | tail -n +2
}
trial 2 (temp 0.7) — fail — FAIL got:
csv_col() {
    local col_name="$1"
    local col_num=$(head -n1 | tr ',' '\n' | grep -n "^$col_name$" | cut -d: -f1)
    if [ -z "$col_num" ]; then
        return 1
    fi
    cut -d',' -f"$col_num" | tail -n +2
}

Bash (hard) — 0/9 (0.4 min / 1.8k tok)

find_dupes — 0/3 passed
prompt sent to the model
Implement in bash: `find_dupes <dir>`. Finds groups of regular files under <dir> (recursive) with identical content (compare by MD5). Prints one group per line: space-separated paths, sorted, only groups of 2+ files. Groups sorted by first path. Must work on macOS (BSD userland: no GNU find -printf, no md5sum — use md5 -r).
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL got:
find_dupes() {
    local dir="$1"
    local temp_file
    temp_file=$(mktemp)
    
    find "$dir" -type f -exec md5 -r {} \; 2>/dev/null | sort > "$temp_file"
    
    awk '{
        if ($0 == prev) {
            if (first == "") first = prev_file
            dupes = dupes " " $2
        } else {
            if (first != "") {
                if (dupes != "") {
                    printf "%s%s\n", first, dupes
                }
                first = ""
                dupes = ""
            }
            prev = $0
            prev_file = $2
        }
    }
    END {
        if (first != "") {
            if (dupes != "") {
                printf "%s%s\n", first, dupes
            }
        }
    }' "$temp_file" | sort
    
    rm -f "$temp_file"
}
trial 1 (temp 0.7) — fail — FAIL got:
find_dupes() {
    local dir="$1"
    local temp_file
    temp_file=$(mktemp)
    
    find "$dir" -type f -exec md5 -r {} \; 2>/dev/null | sort > "$temp_file"
    
    awk '{
        if ($0 == prev) {
            if (first == "") first = prev_file
            files = files " " $2
        } else {
            if (first != "") {
                if (files != "") {
                    cmd = "echo " first files " | sort"
                    cmd | getline sorted
                    close(cmd)
                    print sorted
                }
                first = ""
                files = ""
            }
            prev = $0
            prev_file = $2
        }
    }
    END {
        if (first != "") {
            if (files != "") {
                cmd = "echo " first files " | sort"
                cmd | getline sorted
                close(cmd)
                print sorted
            }
        }
    }' "$temp_file"
    
    rm -f "$temp_file"
}
trial 2 (temp 0.7) — fail — FAIL got:
find_dupes() {
    local dir="$1"
    local temp_file=$(mktemp)
    
    find "$dir" -type f -exec md5 -r {} \; | sort > "$temp_file"
    
    awk '{
        if ($1 == prev_hash) {
            if (first_path == "") {
                first_path = $2
            }
            paths[++count] = $2
        } else {
            if (count > 1) {
                for (i = 1; i <= count; i++) {
                    printf "%s ", paths[i]
                }
                printf "\n"
            }
            count = 1
            first_path = $2
            paths[1] = $2
            prev_hash = $1
        }
    }
    END {
        if (count > 1) {
            for (i = 1; i <= count; i++) {
                printf "%s ", paths[i]
            }
            printf "\n"
        }
    }' "$temp_file"
    
    rm -f "$temp_file"
}
top_errors — 0/3 passed
prompt sent to the model
Implement in bash: `top_errors <logfile> <n>`. Prints the n most frequent ERROR signatures in <logfile>. A signature is the text after 'ERROR: ' with every run of digits replaced by '#'. Output one per line as '<count> <signature>', sorted by count descending, then signature ascending. Print nothing if there are no ERROR lines.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL top1 got:
top_errors() {
    local logfile="$1"
    local n="$2"
    
    if [[ ! -f "$logfile" ]]; then
        return
    fi
    
    grep '^ERROR: ' "$logfile" | \
    sed 's/^ERROR: //; s/[0-9]\+/#/g' | \
    sort | \
    uniq -c | \
    sort -k1,1nr -k2,2 | \
    head -n "$n" | \
    while read count signature; do
        echo "$count $signature"
    done
}
trial 1 (temp 0.7) — fail — FAIL top1 got:
top_errors() {
    local logfile="$1"
    local n="$2"
    
    if [[ ! -f "$logfile" ]]; then
        return
    fi
    
    grep '^ERROR: ' "$logfile" | \
    sed 's/^ERROR: //; s/[0-9]\+/#/g' | \
    sort | \
    uniq -c | \
    sort -k1,1nr -k2,2 | \
    head -n "$n" | \
    awk '{print $1, $2}'
}
trial 2 (temp 0.7) — fail — FAIL top1 got:
top_errors() {
    local logfile="$1"
    local n="$2"
    
    if [[ ! -f "$logfile" ]]; then
        return
    fi
    
    grep '^ERROR: ' "$logfile" | \
    sed 's/^ERROR: //; s/[0-9]\+/#/g' | \
    sort | \
    uniq -c | \
    sort -k1,1nr -k2,2 | \
    head -n "$n" | \
    while read count signature; do
        echo "$count $signature"
    done
}
backup_rotate — 0/3 passed
prompt sent to the model
Implement in bash: `backup_rotate <dir> <keep>`. In <dir>, deletes all but the <keep> newest files matching backup-*.tar.gz (newest = lexicographically greatest names). Prints each deleted file's name (not path), one per line, oldest first. Deletes nothing if there are <= <keep> backups (prints nothing).
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — backup-20260103-120000.tar.gz
backup_rotate() {
    local dir="$1"
    local keep="$2"
    local -a backups
    local i=0
    
    # Find all backup-*.tar.gz files
    while IFS= read -r -d '' file; do
        backups[i]="${file##*/}"
        ((i++))
    done < <(find "$dir" -maxdepth 1 -name 'backup-*.tar.gz' -print0 2>/dev/null)
    
    local count=${#backups[@]}
    
    # If we have <= keep backups, do nothing
    if (( count <= keep )); then
        return
    fi
    
    # Sort backups lexicographically (newest first)
    IFS=$'\n' sorted=($(sort -r <<<"${backups[*]}"))
    unset IFS
    
    # Delete the oldest backups (keep the newest keep ones)
    local delete_count=$((count - keep))
    for ((i=0; i<delete_count; i++)); do
        echo "${sorted[i]}"
        rm -f "$dir/${sorted[i]}"
    done
}
trial 1 (temp 0.7) — fail — backup-20260103-120000.tar.gz
backup_rotate() {
    local dir="$1"
    local keep="$2"
    local -a backups
    local i=0
    
    # Find all backup-*.tar.gz files
    while IFS= read -r -d '' file; do
        backups[i]="${file##*/}"
        ((i++))
    done < <(find "$dir" -maxdepth 1 -name 'backup-*.tar.gz' -print0 2>/dev/null)
    
    local count=${#backups[@]}
    
    # If we have <= keep backups, do nothing
    if (( count <= keep )); then
        return
    fi
    
    # Sort backups lexicographically (newest first)
    IFS=$'\n' sorted=($(sort -r <<<"${backups[*]}"))
    unset IFS
    
    # Delete the oldest backups (keep the newest keep ones)
    local delete_count=$((count - keep))
    for ((i=0; i<delete_count; i++)); do
        echo "${sorted[i]}"
        rm -f "$dir/${sorted[i]}"
    done
}
trial 2 (temp 0.7) — fail — backup-20260103-120000.tar.gz
backup_rotate() {
    local dir="$1"
    local keep="$2"
    local -a backups
    local i=0
    
    # Find all backup-*.tar.gz files
    while IFS= read -r -d '' file; do
        backups[i]="${file##*/}"
        ((i++))
    done < <(find "$dir" -maxdepth 1 -name 'backup-*.tar.gz' -print0 2>/dev/null)
    
    local count=${#backups[@]}
    
    # If we have <= keep backups, do nothing
    if (( count <= keep )); then
        return
    fi
    
    # Sort backups lexicographically (newest first)
    IFS=$'\n' sorted=($(sort -r <<<"${backups[*]}"))
    unset IFS
    
    # Delete the oldest backups (keep the newest keep ones)
    local delete_count=$((count - keep))
    for ((i=0; i<delete_count; i++)); do
        echo "${sorted[i]}"
        rm -f "$dir/${sorted[i]}"
    done
}

seed-oss 36b 68% overall↑ top

Served via llama.cpp Vulkan · 10.2 tok/s · 0.6 GB RAM · coding total 86/126

Bash — 17/24 (56.5 min / 33.9k tok)

count_matches — 2/3 passed
prompt sent to the model
Implement in bash: `count_matches <pattern> <file>`. Prints the number of lines in <file> matching <pattern> (fixed string). Prints 0 when nothing matches.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL count zzz
count_matches() {
    local pattern="$1" file="$2"
    [ -r "$file" ] && [ -f "$file" ] && grep -Fc "$pattern" "$file" || echo 0
}
extract_urls — 0/3 passed
prompt sent to the model
Implement in bash: `extract_urls`. Reads stdin, prints every http:// or https:// URL found, one per line, in order of appearance. Nothing else.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — https://c.net
extract_urls() {
    grep -Eo 'https?://[^\s]+'
}
trial 1 (temp 0.7) — fail — https://c.net
extract_urls() {
	grep -o 'https?://[^\s]*'
}
trial 2 (temp 0.7) — fail — https://c.net
extract_urls() {
  grep -oE 'https?://[^\s]+'
}
csv_col — 1/3 passed
prompt sent to the model
Implement in bash: `csv_col <name>`. Reads a CSV from stdin (first line is a header). Prints the values of the column named <name>, one per line, in order.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 1 (temp 0.7) — fail — FAIL got:
csv_col() {
    awk -v target="$1" '
        NR == 1 {
            for (i = 1; i <= NF; i++) {
                if ($i == target) {
                    col = i
                    break
                }
            }
            if (!col) exit 1
        }
        NR > 1 { print $col }
    '
}
trial 2 (temp 0.7) — fail — FAIL got:
csv_col() {
  read -r -a header
  local col_idx=-1
  for i in "${!header[@]}"; do
    [[ "${header[$i]}" == "$1" ]] && { col_idx=$i; break; }
  done
  while IFS=, read -r -a fields; do
    echo "${fields[$col_idx]}"
  done
}
json_get — 2/3 passed
prompt sent to the model
Implement in bash: `json_get <key>`. Reads a flat JSON object on stdin and prints the string value of top-level <key>. python3 is available; jq is not.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL name
json_get() {
  python3 -c "import json,sys;data=json.load(sys.stdin);print(json.dumps(data[sys.argv[1]]))" "$1"
}

Bash (hard) — 2/9 (54.1 min / 32.2k tok)

find_dupes — 0/3 passed
prompt sent to the model
Implement in bash: `find_dupes <dir>`. Finds groups of regular files under <dir> (recursive) with identical content (compare by MD5). Prints one group per line: space-separated paths, sorted, only groups of 2+ files. Groups sorted by first path. Must work on macOS (BSD userland: no GNU find -printf, no md5sum — use md5 -r).
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — truncated — hit the 4096-token cap
(no code extracted)
trial 1 (temp 0.7) — truncated — hit the 4096-token cap
(no code extracted)
trial 2 (temp 0.7) — truncated — hit the 4096-token cap
(no code extracted)
top_errors — 0/3 passed
prompt sent to the model
Implement in bash: `top_errors <logfile> <n>`. Prints the n most frequent ERROR signatures in <logfile>. A signature is the text after 'ERROR: ' with every run of digits replaced by '#'. Output one per line as '<count> <signature>', sorted by count descending, then signature ascending. Print nothing if there are no ERROR lines.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — truncated — hit the 4096-token cap
(no code extracted)
trial 1 (temp 0.7) — fail — hit the 4096-token cap
top_errors() {
  local logfile="$1"
  local n="$2"
  grep 'ERROR: ' "$logfile" | \
    awk '{print substr($0, index($0, "ERROR: ") + 7)}' | \
    sed 's/[0-9]\+/#/g' | \
    sort | uniq -c | \
    sort -k1,1nr -k2,2 | \
    head -n "$n"
}
trial 2 (temp 0.7) — fail — hit the 4096-token cap
top_errors() {
  grep -F 'ERROR: ' "$1" | awk '{ print substr($0, index($0, "ERROR: ") + 7) }' | sed 's/[0-9]\+/#/g' | sort | uniq -c | sort -k1,1nr -k2 | head -n "$2"
}
backup_rotate — 2/3 passed
prompt sent to the model
Implement in bash: `backup_rotate <dir> <keep>`. In <dir>, deletes all but the <keep> newest files matching backup-*.tar.gz (newest = lexicographically greatest names). Prints each deleted file's name (not path), one per line, oldest first. Deletes nothing if there are <= <keep> backups (prints nothing).
Reply with only a bash code block defining the function. No tests, no explanation.
trial 1 (temp 0.7) — fail — backup-20260105-120000.tar.gz
backup_rotate() {
  local dir="$1" keep="$2"
  local files=()
  while IFS= read -d '' -r file; do
    files+=("$file")
  done < <(find "$dir" -maxdepth 1 -type f -name 'backup-*.tar.gz' -print0 | sort -rz)
  local count=${#files[@]}
  (( count <= keep )) && return
  local delete_idx=$keep deleted_full=("${files[@]:$delete_idx}")
  local deleted_names=()
  for file in "${deleted_full[@]}"; do
    deleted_names+=("$(basename "$file")")
  done
  local reversed=()
  for ((i=${#deleted_names[@]}-1; i>=0; i--)); do
    reversed+=("${deleted_names[i]}")
  done
  printf '%s\n' "${reversed[@]}"
  for file in "${deleted_full[@]}"; do
    rm "$file"
  done
}

mistral-small-4 119B 65% overall↑ top

Served via llama.cpp Vulkan · 42.2 tok/s · 0.2 GB RAM · coding total 82/126

Bash — 12/24 (1.0 min / 2.3k tok)

extract_urls — 0/3 passed
prompt sent to the model
Implement in bash: `extract_urls`. Reads stdin, prints every http:// or https:// URL found, one per line, in order of appearance. Nothing else.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — https://c.net
extract_urls() {
  grep -oE 'https?://[^[:space:]"]+'
}
trial 1 (temp 0.7) — fail — https://c.net
extract_urls() {
  grep -oE 'https?://[^[:space:]"]+'
}
trial 2 (temp 0.7) — fail — https://c.net
extract_urls() {
  grep -oE 'https?://[^[:space:]"]+'
}
rotate — 0/3 passed
prompt sent to the model
Implement in bash: `rotate <file>`. Rotates logs one level: <file>.1 becomes <file>.2, then <file> becomes <file>.1. If <file>.1 does not exist, just rename <file> to <file>.1.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — cat: log.1: No such file or directory
rotate() {
    local file="$1"
    local next_level=$(find "$file"* -maxdepth 0 -type f -name "$file.[0-9]*" | sort -t. -k2 -n | tail -n1 | sed -e "s/^$file\.\([0-9]\+\)$/\1/" -e "s/^$file$//")
    if [ -z "$next_level" ]; then
        mv "$file" "$file.1"
    else
        next_level=$((next_level + 1))
        mv "$file" "$file.$next_level"
        mv "$file.1" "$file.2"
    fi
}
trial 1 (temp 0.7) — fail — cat: log.1: No such file or directory
rotate() {
    local file="$1"
    local next_level=$(find "$file"* -maxdepth 0 -type f -name "$file.[0-9]*" | sort -t. -k2,2nr | head -n 1 | sed -e "s/^$file\.\([0-9]\+\)$/\1/" -e "s/^$file$//")
    if [ -z "$next_level" ]; then
        mv "$file" "$file.1"
    else
        local next_level=$((next_level + 1))
        mv "$file" "$file.$next_level"
        if [ $next_level -gt 1 ]; then
            mv "$file.$((next_level - 1))" "$file.1"
        fi
    fi
}
trial 2 (temp 0.7) — fail — cat: log.1: No such file or directory
rotate() {
    local file="$1"
    local next_level=$(find "$file"* -maxdepth 0 -type f -name "$file.[0-9]*" | sort -t. -k2,2nr | head -n 1 | sed -e "s/^$file\.\([0-9]\+\)$/\1/" -e "s/^$file$//")
    if [ -z "$next_level" ]; then
        mv "$file" "$file.1"
    else
        local next_level=$((next_level + 1))
        mv "$file" "$file.$next_level"
        if [ $next_level -gt 1 ]; then
            mv "$file.$((next_level - 1))" "$file.1"
        fi
    fi
}
csv_col — 0/3 passed
prompt sent to the model
Implement in bash: `csv_col <name>`. Reads a CSV from stdin (first line is a header). Prints the values of the column named <name>, one per line, in order.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL got:
csv_col() {
  local name="$1"
  local header
  local col_index
  local line

  header=$(head -n 1)
  col_index=$(echo "$header" | awk -F, -v name="$name" '{
    for (i=1; i<=NF; i++) {
      if ($i == name) {
        print i-1
        exit
      }
    }
    exit 1
  }')

  if [[ -z "$col_index" ]]; then
    echo "Column '$name' not found in CSV header" >&2
    return 1
  fi

  while IFS= read -r line; do
    echo "$line" | cut -d, -f$((col_index + 1))
  done
}
trial 1 (temp 0.7) — fail — FAIL got:
csv_col() {
  local name="$1"
  local header
  local col_index
  local line

  header=$(head -n 1)
  col_index=$(echo "$header" | awk -F, -v name="$name" '{
    for (i=1; i<=NF; i++) {
      if ($i == name) {
        print i-1
        exit
      }
    }
    exit 1
  }')

  if [ -z "$col_index" ]; then
    echo "Column '$name' not found in CSV header" >&2
    exit 1
  fi

  while IFS= read -r line; do
    echo "$line" | cut -d, -f$((col_index + 1))
  done
}
trial 2 (temp 0.7) — fail — FAIL got:
csv_col() {
  local name="$1"
  local header
  local col_index
  local line

  header=$(head -n 1)
  col_index=$(echo "$header" | awk -F, -v name="$name" '{
    for (i=1; i<=NF; i++) {
      if ($i == name) {
        print i-1
        exit
      }
    }
    exit 1
  }')

  if [ -z "$col_index" ]; then
    echo "Column '$name' not found in CSV header" >&2
    exit 1
  fi

  while IFS= read -r line; do
    echo "$line" | cut -d, -f$((col_index + 1))
  done
}
json_get — 0/3 passed
prompt sent to the model
Implement in bash: `json_get <key>`. Reads a flat JSON object on stdin and prints the string value of top-level <key>. python3 is available; jq is not.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL name
json_get() {
  local key="$1"
  local line
  while IFS= read -r line; do
    if [[ "$line" =~ ^[[:space:]]*\"$key\"[[:space:]]*:[[:space:]]*\"([^\"]*)\" ]]; then
      echo "${BASH_REMATCH[1]}"
      return
    elif [[ "$line" =~ ^[[:space:]]*\"$key\"[[:space:]]*:[[:space:]]*([^[:space:],\}]*) ]]; then
      echo "${BASH_REMATCH[1]}"
      return
    fi
  done
}
trial 1 (temp 0.7) — fail — FAIL name
json_get() {
  local key="$1"
  local line
  while IFS= read -r line; do
    if [[ "$line" =~ ^[[:space:]]*\"$key\"[[:space:]]*:[[:space:]]*\"([^\"]*)\" ]]; then
      echo "${BASH_REMATCH[1]}"
      return
    elif [[ "$line" =~ ^[[:space:]]*\"$key\"[[:space:]]*:[[:space:]]*([^[:space:],}]*) ]]; then
      echo "${BASH_REMATCH[1]}"
      return
    fi
  done
}
trial 2 (temp 0.7) — fail — FAIL name
json_get() {
  local key="$1"
  local line
  while IFS= read -r line; do
    if [[ "$line" =~ ^[[:space:]]*\"$key\"[[:space:]]*:[[:space:]]*\"([^\"]*)\" ]]; then
      echo "${BASH_REMATCH[1]}"
      return
    elif [[ "$line" =~ ^[[:space:]]*\"$key\"[[:space:]]*:[[:space:]]*([^[:space:],}]*) ]]; then
      echo "${BASH_REMATCH[1]}"
      return
    fi
  done
}

Bash (hard) — 3/9 (0.5 min / 1.2k tok)

find_dupes — 0/3 passed
prompt sent to the model
Implement in bash: `find_dupes <dir>`. Finds groups of regular files under <dir> (recursive) with identical content (compare by MD5). Prints one group per line: space-separated paths, sorted, only groups of 2+ files. Groups sorted by first path. Must work on macOS (BSD userland: no GNU find -printf, no md5sum — use md5 -r).
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — find: ‘md5’: No such file or directory
find_dupes() {
  local dir="$1"
  find "$dir" -type f -exec md5 -r {} + | sort | awk '{
    md5=$1
    path=$2
    if (md5 != prev) {
      if (NR > 1) {
        if (count > 1) {
          for (i=1; i<=count; i++) print paths[i]
        }
        delete paths
      }
      count=1
      paths[count]=path
      prev=md5
    } else {
      count++
      paths[count]=path
    }
  } END {
    if (count > 1) {
      for (i=1; i<=count; i++) print paths[i]
    }
  }' | sort | uniq -f1 -d
}
trial 1 (temp 0.7) — fail — find: ‘md5’: No such file or directory
find_dupes() {
  local dir="$1"
  find "$dir" -type f -exec md5 -r {} + | sort | awk '{
    md5=$1
    path=$2
    if (md5 != prev) {
      if (NR > 1) {
        if (count > 1) {
          for (i=1; i<=count; i++) print paths[i]
        }
        delete paths
      }
      count=1
      paths[count]=path
      prev=md5
    } else {
      count++
      paths[count]=path
    }
  } END {
    if (count > 1) {
      for (i=1; i<=count; i++) print paths[i]
    }
  }' | sort
}
trial 2 (temp 0.7) — fail — find: ‘md5’: No such file or directory
find_dupes() {
  local dir="$1"
  find "$dir" -type f -exec md5 -r {} + | sort | awk '{
    md5=$1
    path=$2
    if (md5 != prev) {
      if (NR > 1) {
        if (count > 1) {
          for (i=1; i<=count; i++) print paths[i]
        }
        delete paths
      }
      count=1
      paths[count]=path
      prev=md5
    } else {
      count++
      paths[count]=path
    }
  } END {
    if (count > 1) {
      for (i=1; i<=count; i++) print paths[i]
    }
  }' | sort
}
top_errors — 0/3 passed
prompt sent to the model
Implement in bash: `top_errors <logfile> <n>`. Prints the n most frequent ERROR signatures in <logfile>. A signature is the text after 'ERROR: ' with every run of digits replaced by '#'. Output one per line as '<count> <signature>', sorted by count descending, then signature ascending. Print nothing if there are no ERROR lines.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — disk
top_errors() {
  local logfile="$1"
  local n="$2"
  awk -F'ERROR: ' '/ERROR: / {print $2}' "$logfile" | sed 's/[0-9][0-9]*/#/g' | sort | uniq -c | sort -nr | head -n "$n" | awk '{count=$1; $1=""; print count, substr($0, 2)}' | sort -k1,1nr -k2,2 | awk '{print $2}'
}
trial 1 (temp 0.7) — fail — disk
top_errors() {
  local logfile="$1"
  local n="$2"
  awk -F'ERROR: ' '/ERROR: / {print $2}' "$logfile" | sed 's/[0-9][0-9]*/#/g' | sort | uniq -c | sort -nr | head -n "$n" | awk '{count=$1; $1=""; print count, substr($0, 2)}' | sort -k1,1nr -k2,2 | awk '{print $2}'
}
trial 2 (temp 0.7) — fail — disk
top_errors() {
  local logfile="$1"
  local n="$2"
  awk -F'ERROR: ' '/ERROR: / {print $2}' "$logfile" | sed 's/[0-9][0-9]*/#/g' | sort | uniq -c | sort -nr | head -n "$n" | awk '{count=$1; $1=""; print count, substr($0, 2)}' | sort -k1,1nr -k2,2 | awk '{print $2}'
}

aya-23 35b 51% overall↑ top

Served via llama.cpp Vulkan · 9.6 tok/s · 2.1 GB RAM · coding total 64/126

Bash — 12/24 (3.2 min / 1.9k tok)

largest_file — 0/3 passed
prompt sent to the model
Implement in bash: `largest_file <dir>`. Prints the path of the largest regular file under <dir> (recursive). Exactly one line, the path.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL got
function largest_file() {
    local dir="$1"
    local max_size=0
    local max_file=""
    find "$dir" -type f -exec du -ch {} + | sort -rh | awk '{ if ($1 > '$(printf "%d\n" "$max_size")') { max_file = $2; max_size = $1 } }'
    echo "$max_file"
}
trial 1 (temp 0.7) — fail — FAIL got
function largest_file() {
    local dir="$1"
    local max_size=0
    local max_file=""
    find "$dir" -type f -exec du -ch {} + | sort -rh | awk '{ if ($1 > '$(printf "%d\n" "$max_size")') { max_file = $2; max_size = $1 } }'
    echo "$max_file"
}
trial 2 (temp 0.7) — fail — FAIL got
function largest_file() {
    local dir="$1"
    local max_size=0
    local max_file=""
    find "$dir" -type f -exec du -ch {} + | sort -rh | awk '{ if ($1 > '$(printf "%d\n" "$max_size")') { max_file = $2; max_size = $1 } }'
    echo "$max_file"
}
retry3 — 0/3 passed
prompt sent to the model
Implement in bash: `retry3 <cmd...>`. Runs the command; if it fails, retries up to 3 total attempts. Exits 0 if any attempt succeeds, otherwise exits with the last attempt's exit code.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL flaky never succeeded
retry3() {
  local -i attempts=0
  local -i max_attempts=3
  local -i exit_code=0

  until [[ $attempts -ge $max_attempts ]]; do
    exit_code=$?
    attempts=$((attempts + 1))
    if [[ $exit_code -eq 0 ]]; then
      return 0
    fi
    sleep 1
  done

  return $exit_code
}
trial 1 (temp 0.7) — fail — FAIL flaky never succeeded
retry3() {
  local -i attempts=0
  local -i max_attempts=3
  local -i exit_code=0

  until [[ $attempts -ge $max_attempts ]]; do
    exit_code=$?
    attempts=$((attempts + 1))
    if [[ $exit_code -eq 0 ]]; then
      return 0
    fi
    sleep 1
  done

  return $exit_code
}
trial 2 (temp 0.7) — fail — FAIL flaky never succeeded
retry3() {
  local -i attempts=0
  local -i max_attempts=3
  local -i exit_code=0

  until [[ $attempts -ge $max_attempts ]]; do
    exit_code=$?
    attempts=$((attempts + 1))
    if [[ $exit_code -eq 0 ]]; then
      return 0
    fi
    sleep 1
  done

  return $exit_code
}
extract_urls — 0/3 passed
prompt sent to the model
Implement in bash: `extract_urls`. Reads stdin, prints every http:// or https:// URL found, one per line, in order of appearance. Nothing else.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL got:
function extract_urls() {
    while IFS= read -r line; do
        urls=$(echo "$line" | perl -ne 'print "$1" if m{https?://[^\s"]+}g')
        echo "$urls"
    done
}
trial 1 (temp 0.7) — fail — FAIL got:
function extract_urls() {
    while IFS= read -r line; do
        urls=$(echo "$line" | perl -ne 'print "$1\n" if /(https?|ftp):\/\/[^\s/]+/i')
        echo "$urls"
    done
}
trial 2 (temp 0.7) — fail — FAIL got:
function extract_urls() {
    while IFS= read -r line; do
        urls=$(echo "$line" | perl -ne 'print "$1\n" if /(https?|ftp):\/\/[^\s/]+/i')
        echo "$urls"
    done
}
csv_col — 0/3 passed
prompt sent to the model
Implement in bash: `csv_col <name>`. Reads a CSV from stdin (first line is a header). Prints the values of the column named <name>, one per line, in order.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL got:
function csv_col() {
    local col=$1
    local header=$(head -n 1 < /dev/stdin)
    local cols=$(echo "$header" | tr ',' '\n' | wc -l)
    local i=0
    while IFS= read -r line; do
        local val=$(echo "$line" | awk -v col=$col -v header=$header '
            $1 == col { print $NF }
            $1 == header { for (i=2; i<=NF; i++) printf "%s,", $i; print "" }
        ')
        if [[ $val ]]; then
            echo "$val"
        fi
    done
}
trial 1 (temp 0.7) — fail — FAIL got:
function csv_col() {
    local col=$1
    local header=$(head -n 1 < /dev/stdin)
    local cols=$(echo "$header" | tr ',' '\n' | wc -l)
    local i=0
    while IFS= read -r line; do
        local val=$(echo "$line" | awk -v col=$col -v header=$header '
            $1 == col { print $NF }
            $1 == header { for (i=2; i<=NF; i++) printf "%s,", $i; print "" }
        ')
        if [[ $val ]]; then
            echo "$val"
        fi
    done
}
trial 2 (temp 0.7) — fail — FAIL got:
function csv_col() {
    local col=$1
    local header=$(head -n 1 < /dev/stdin)
    local cols=$(echo "$header" | tr ',' '\n' | wc -l)
    local i=0
    while IFS= read -r line; do
        local val=$(echo "$line" | awk -v col=$col -v header=$header '
            $1 == col { print $NF }
            $1 == header { for (i=2; i<=NF; i++) printf "%s,", $i; print "" }
        ')
        if [[ $val ]]; then
            echo "$val"
        fi
    done
}

Bash (hard) — 0/9 (3.6 min / 2.1k tok)

find_dupes — 0/3 passed
prompt sent to the model
Implement in bash: `find_dupes <dir>`. Finds groups of regular files under <dir> (recursive) with identical content (compare by MD5). Prints one group per line: space-separated paths, sorted, only groups of 2+ files. Groups sorted by first path. Must work on macOS (BSD userland: no GNU find -printf, no md5sum — use md5 -r).
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — solution.sh: line 3: md5: command not found
function find_dupes() {
    local dir="$1"
    local md5s=$(md5 -r "$dir" | awk '{print $1, $2}')
    local groups=$(echo "$md5s" | sort -k2 | uniq -w32 -c -i | awk '!seen[$2]++ {print $2, $1}')
    local paths=$(echo "$groups" | awk '{print $2}' | xargs -I{} find "{}" -type f -print0 | sort -z | tr '\0' '\n')
    local result=$(echo "$paths" | xargs -I{} sh -c 'echo "$(md5 -r "{}") {}"')
    echo "$result" | awk -F'[ \t]+' 'NR==FNR{a[$1]=$2;next}{if(a[$1]!="")print a[$1],$2}' FS='\n' RS=
}
trial 1 (temp 0.7) — fail — solution.sh: line 3: md5: command not found
function find_dupes() {
    local dir="$1"
    local md5s=$(md5 -r "$dir" | awk '{print $1, $2}')
    local groups=$(echo "$md5s" | sort -k2 | uniq -w32 -c -i | awk '!seen[$2]++ {print $2, $1}')
    local paths=$(echo "$groups" | awk '{print $2}' | xargs -I{} find "{}" -type f -print0 | sort -z | tr '\0' '\n')
    local result=$(echo "$paths" | xargs -I{} sh -c 'echo "$(md5 -r "{}") {}"')
    echo "$result" | awk -F'[ \t]+' '
        $1 != last {
            if (NR > 1) print last
            last = $1
        }
        {print}
    '
}
trial 2 (temp 0.7) — fail — solution.sh: line 3: md5: command not found
function find_dupes() {
    local dir="$1"
    local md5s=$(md5 -r "$dir" | awk '{print $1, $2}')
    local groups=$(echo "$md5s" | sort -k2 | uniq -w32 -c -i | awk '!seen[$2]++ {print $2, $1}')
    local paths=$(echo "$groups" | awk '{print $2}' | xargs -I{} find "{}" -type f -print0 | sort -z | tr '\0' '\n')
    local result=$(echo "$paths" | xargs -I{} sh -c 'echo "$(md5 -r "{}") {}"')
    echo "$result" | awk -F'[ \t]+' '
        $1 != last {
            if (NR > 1) print last
            last = $1
        }
        {print}
    '
}
top_errors — 0/3 passed
prompt sent to the model
Implement in bash: `top_errors <logfile> <n>`. Prints the n most frequent ERROR signatures in <logfile>. A signature is the text after 'ERROR: ' with every run of digits replaced by '#'. Output one per line as '<count> <signature>', sorted by count descending, then signature ascending. Print nothing if there are no ERROR lines.
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — FAIL top1 got:
function top_errors() {
    local file="$1"
    local n="$2"
    local err_re='^ERROR: ([^#\d]*)(\d+)?'
    local err_sig_re='^ERROR: ([^:]*):'
    local sig_replace_re='(\d+)'
    local sig_replace='#'
    local count
    local sig
    local err_lines
    local err_sig
    local err_counts
    local err_sig_counts
    local max_count=0

    if [[ ! -f "$file" ]]; then
        echo "File not found: $file"
        return 1
    fi

    err_lines=$(grep -E '^ERROR:' "$file" | sort -u)
    err_sig_counts=$(echo "$err_lines" | awk -F: '{print $1}' | sort | uniq -c | sort -nr | head -n "$n")
    err_counts=$(echo "$err_lines" | awk -F: '{print $2}' | sort | uniq -c | sort -nr | head -n "$n")

    for sig in $(echo "$err_sig_counts" | awk '{print $2}'); do
        count=$(echo "$err_counts" | awk '$1 ~/"^'$sig'"/ {print $1}')
        if [[ $count -gt $max_count ]]; then
            max_count=$count
        fi
    done

    echo "$err_sig_counts" | awk -v max="$max_count" '
        $1 ~/"^'$sig'"/ {
            if ($1 == max) {
                print $1, $2
            }
        }
    '

    for sig in $(echo "$err_sig_counts" | awk '{print $2}'); do
        count=$(echo "$err_counts" | awk '$1 ~/"^'$sig'"/ {print $1}')
        if [[ $count -lt $max_count ]]; then
            echo "$count $sig"
        fi
    done
}
trial 1 (temp 0.7) — fail — FAIL top1 got:
function top_errors() {
    local file="$1"
    local n="$2"
    local err_counts=()
    local err_sigs=()

    if [[ ! -f "$file" ]]; then
        echo "File not found: $file"
        return 1
    fi

    while IFS= read -r line; do
        if [[ $line == ERROR:* ]]; then
            local sig="${line##*ERROR:}"
            sig="${sig//[0-9]/#}"
            err_counts+=("$sig")
        fi
    done < "$file"

    for sig in "${err_counts[@]}"; do
        err_sigs+=("$sig")
    done

    local sorted_indices=($(for i in "${!err_counts[@]}"; do echo -en "${err_counts[$i]}\t$i\n"; done) | sort -nr | cut -f2 -d\ )

    for i in "${sorted_indices[@]}"; do
        echo "${err_counts[$i]} ${err_sigs[$i]}"
    done | head -n "$n"
}
trial 2 (temp 0.7) — fail — FAIL top1 got:
function top_errors() {
    local file="$1"
    local n="$2"
    local err_counts=()
    local err_sigs=()

    if [[ ! -f "$file" ]]; then
        echo "File not found: $file"
        return 1
    fi

    while IFS= read -r line; do
        if [[ $line == ERROR:* ]]; then
            local sig="${line##*ERROR:}"
            sig="${sig//[0-9]/#}"
            err_counts+=("$sig")
        fi
    done < "$file"

    for sig in "${err_counts[@]}"; do
        err_sigs+=("$sig")
    done

    local sorted_indices=($(for i in "${!err_counts[@]}"; do echo -en "${err_counts[$i]}\t$i\n"; done) | sort -nr | cut -f2 -d\ )

    for i in "${sorted_indices[@]}"; do
        echo "${err_counts[$i]} ${err_sigs[$i]}"
    done | head -n "$n"
}
backup_rotate — 0/3 passed
prompt sent to the model
Implement in bash: `backup_rotate <dir> <keep>`. In <dir>, deletes all but the <keep> newest files matching backup-*.tar.gz (newest = lexicographically greatest names). Prints each deleted file's name (not path), one per line, oldest first. Deletes nothing if there are <= <keep> backups (prints nothing).
Reply with only a bash code block defining the function. No tests, no explanation.
trial 0 (temp 0) — fail — solution.sh: line 15: npx: command not found
function backup_rotate() {
    local dir="$1"
    local keep="$2"

    if [[ ! -d "$dir" ]]; then
        echo "Error: '$dir' is not a directory."
        return 1
    fi

    local files=("$dir"/backup-*.tar.gz)
    if [[ ${#files[@]} -le $keep ]]; then
        return 0
    fi

    local oldest_file=${files[$(npx array-sort "${files[@]}" | cut -d' ' -f1 | wc -l)]}
    local deleted_files=()

    for file in "${files[@]:1}"; do
        deleted_files+=("$file")
        rm "$file"
    done

    for file in "${deleted_files[@]}"; do
        echo "$file"
    done
}
trial 1 (temp 0.7) — fail — solution.sh: line 15: npx: command not found
function backup_rotate() {
    local dir="$1"
    local keep="$2"

    if [[ ! -d "$dir" ]]; then
        echo "Error: '$dir' is not a directory."
        return 1
    fi

    local files=("$dir"/backup-*.tar.gz)
    if [[ ${#files[@]} -le $keep ]]; then
        return 0
    fi

    local oldest_file=${files[$(npx array-sort "${files[@]}" | cut -d' ' -f1 | wc -l)]}
    local deleted_files=()

    for file in "${files[@]:1}"; do
        deleted_files+=("$file")
        rm "$file"
    done

    for file in "${deleted_files[@]}"; do
        echo "$file"
    done
}
trial 2 (temp 0.7) — fail — solution.sh: line 15: npx: command not found
function backup_rotate() {
    local dir="$1"
    local keep="$2"

    if [[ ! -d "$dir" ]]; then
        echo "Error: '$dir' is not a directory."
        return 1
    fi

    local files=("$dir"/backup-*.tar.gz)
    if [[ ${#files[@]} -le $keep ]]; then
        return 0
    fi

    local oldest_file=${files[$(npx array-sort "${files[@]}" | cut -d' ' -f1 | wc -l)]}
    local deleted_files=()

    for file in "${files[@]:1}"; do
        deleted_files+=("$file")
        rm "$file"
    done

    for file in "${deleted_files[@]}"; do
        echo "$file"
    done
}