Kartik
107 lines
3.1 KiB
Bash
Executable File
107 lines
3.1 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Hook: PostToolUse (matcher: Bash)
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#
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# Scans bash command output for stack traces and error patterns.
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# When found, injects a search rubric telling the agent to check mem0
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# for prior occurrences of the same error.
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#
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# This complements on_user_prompt.sh (which catches errors in the user's
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# typed message). This hook catches errors in COMMAND OUTPUT — e.g.,
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# when `npm test` or `python script.py` fails with a traceback.
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#
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# Input: JSON on stdin with tool_name, tool_input, tool_output
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# Output: Context injected into Claude's next response (exit 0)
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set -uo pipefail
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INPUT=$(cat)
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TOOL_RESULT=$(echo "$INPUT" | jq -r '.tool_output // ""' 2>/dev/null || echo "")
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# Skip short output (< 50 chars unlikely to contain a real stack trace)
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if [ ${#TOOL_RESULT} -lt 50 ]; then
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exit 0
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fi
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# Skip if this is a git commit (handled by on_post_commit.sh)
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COMMAND=$(echo "$INPUT" | jq -r '.tool_input.command // ""' 2>/dev/null || echo "")
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case "$COMMAND" in
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*"git commit"*|*"git merge"*|*"git rebase"*)
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exit 0
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;;
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esac
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# Detect stack traces and error patterns in command output
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HAS_ERROR=""
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if echo "$TOOL_RESULT" | grep -qE '(Traceback \(most recent call last\)|panic: |FATAL:|error\[E[0-9]+\])'; then
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HAS_ERROR="true"
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elif [ "$(echo "$TOOL_RESULT" | grep -cE '(Error:|Exception:)')" -ge 2 ]; then
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HAS_ERROR="true"
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fi
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if [ -z "$HAS_ERROR" ]; then
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exit 0
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fi
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SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
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. "$SCRIPT_DIR/_identity.sh" 2>/dev/null || true
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if [ -z "${MEM0_API_KEY:-}" ]; then
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exit 0
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fi
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# Extract error class/message (first matching line)
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ERROR_LINE=$(echo "$TOOL_RESULT" | grep -iE '(Error:|Exception:|panic:|FAIL:|fatal:)' | head -1 | sed 's/^[[:space:]]*//' | cut -c1-120)
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# Extract file paths from stack trace frames
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TRACE_FILES=$(echo "$TOOL_RESULT" | grep -oE '([a-zA-Z0-9_./-]+\.(py|ts|tsx|js|jsx|rs|go|rb|java|sh))(:[0-9]+)?' | head -5 | sort -u)
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# Build file list for display
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FILE_DISPLAY=""
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if [ -n "$TRACE_FILES" ]; then
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FILE_DISPLAY=$(echo "$TRACE_FILES" | sed 's/^/ - /')
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fi
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USER_ID="$MEM0_RESOLVED_USER_ID"
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cat <<EOF
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## Error detected in command output
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\`$COMMAND\` produced an error:
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> $ERROR_LINE
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EOF
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if [ -n "$FILE_DISPLAY" ]; then
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cat <<EOF
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**Files in stack trace:**
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$FILE_DISPLAY
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EOF
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fi
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cat <<EOF
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Search mem0 for prior occurrences — this error may have been seen before:
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- \`search_memories(query="$(echo "$ERROR_LINE" | cut -c1-60)", filters={"AND": [{"user_id": "$USER_ID"}, {"app_id": "$MEM0_PROJECT_ID"}, {"metadata": {"type": "anti_pattern"}}]})\`
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- \`search_memories(query="$(echo "$ERROR_LINE" | cut -c1-60)", filters={"AND": [{"user_id": "$USER_ID"}, {"app_id": "$MEM0_PROJECT_ID"}, {"metadata": {"type": "bug_fix"}}]})\`
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EOF
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if [ -n "$TRACE_FILES" ]; then
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FIRST_FILE=$(echo "$TRACE_FILES" | head -1 | sed 's/:[0-9]*//')
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cat <<EOF
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- \`search_memories(query="$FIRST_FILE", filters={"AND": [{"user_id": "$USER_ID"}, {"app_id": "$MEM0_PROJECT_ID"}]})\`
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EOF
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fi
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cat <<EOF
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If mem0 returns relevant context, use it to debug faster.
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If you solve this, store the fix as an \`anti_pattern\` or \`bug_fix\` memory for next time.
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EOF
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# Telemetry
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python3 "$SCRIPT_DIR/telemetry.py" bash_error --error_detected 2>/dev/null &
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exit 0
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