agent/claude/issues/012-hooks-test-feedback.md

feat(hooks): Reduce test noise with smart output filtering

Summary

Add PostToolUse hooks that filter test output to show only what matters - failures and summaries, not passing tests.

Problem

When running core go test or core php test, the full output floods the context:

• Hundreds of "PASS" lines for passing tests
• Verbose coverage output
• Repetitive timing information

This wastes context window and makes failures harder to spot.

Solution

PostToolUse hooks that:

1. Parse test output
2. Extract only failures, errors, and summary
3. Return filtered output as additionalContext
4. Use suppressOutput: true to hide the verbose original

Hook Configuration

{
  "hooks": {
    "PostToolUse": [
      {
        "matcher": "Bash",
        "hooks": [
          {
            "type": "command",
            "command": "core ai filter test-output"
          }
        ]
      }
    ]
  }
}

Filter Logic

Go tests:

• Show: FAIL, ERROR, panic, --- FAIL
• Hide: PASS, RUN, coverage lines (unless requested)
• Summary: "47 passed, 2 failed, 1 skipped"

PHP/Pest tests:

• Show: ✗, FAIL, Error, Exception
• Hide: ✓, passing test names
• Summary: "Tests: 47 passed, 2 failed"

Lint output:

• Show: actual errors/warnings with file:line
• Hide: "no issues found" for each file
• Summary: "3 issues in 2 files"

Output Format

{
  "suppressOutput": true,
  "hookSpecificOutput": {
    "hookEventName": "PostToolUse",
    "additionalContext": "## Test Results\n\n✗ 2 failed, 47 passed\n\n### Failures:\n- TestFoo: expected 5, got 3\n- TestBar: nil pointer"
  }
}

Command Detection

Only filter when command matches:

• core go test*
• core php test*
• core go lint*
• core php stan*
• core qa*