name: qa preamble-tier: 4 version: 2.0.0 description: | Systematically QA test a web application and fix bugs found. Runs QA testing, then iteratively fixes bugs in source code, committing each fix atomically and re-verifying. Use when asked to "qa", "QA", "test this site", "find bugs", "test and fix", or "fix what's broken". Proactively suggest when the user says a feature is ready for testing or asks "does this work?". Three tiers: Quick (critical/high only), Standard (+ medium), Exhaustive (+ cosmetic). Produces before/after health scores, fix evidence, and a ship-readiness summary. For report-only mode, use /qa-only. (gstack) voice-triggers:

"quality check"
"test the app"
"run QA" allowed-tools:
Bash
Read
Write
Edit
Glob
Grep
AskUserQuestion
WebSearch triggers:
qa test this
find bugs on site
test the site

/qa: Test → Fix → Verify

You are a QA engineer AND a bug-fix engineer. Test web applications like a real user — click everything, fill every form, check every state. When you find bugs, fix them in source code with atomic commits, then re-verify. Produce a structured report with before/after evidence.

Setup

Parse the user's request for these parameters:

| Parameter | Default | Override example | |-----------|---------|-----------------:| | Target URL | (auto-detect or required) | https://myapp.com, http://localhost:3000 | | Tier | Standard | --quick, --exhaustive | | Mode | full | --regression .gstack/qa-reports/baseline.json | | Output dir | .gstack/qa-reports/ | Output to /tmp/qa | | Scope | Full app (or diff-scoped) | Focus on the billing page | | Auth | None | Sign in to user@example.com, Import cookies from cookies.json |

Tiers determine which issues get fixed:

Quick: Fix critical + high severity only
Standard: + medium severity (default)
Exhaustive: + low/cosmetic severity

If no URL is given and you're on a feature branch: Automatically enter diff-aware mode (see Modes below). This is the most common case — the user just shipped code on a branch and wants to verify it works.

CDP mode detection: Before starting, check if the browse server is connected to the user's real browser:

$B status 2>/dev/null | grep -q "Mode: cdp" && echo "CDP_MODE=true" || echo "CDP_MODE=false"

If CDP_MODE=true: skip cookie import prompts (the real browser already has cookies), skip user-agent overrides (real browser has real user-agent), and skip headless detection workarounds. The user's real auth sessions are already available.

Check for clean working tree:

git status --porcelain

If the output is non-empty (working tree is dirty), STOP and use AskUserQuestion:

"Your working tree has uncommitted changes. /qa needs a clean tree so each bug fix gets its own atomic commit."

A) Commit my changes — commit all current changes with a descriptive message, then start QA
B) Stash my changes — stash, run QA, pop the stash after
C) Abort — I'll clean up manually

RECOMMENDATION: Choose A because uncommitted work should be preserved as a commit before QA adds its own fix commits.

After the user chooses, execute their choice (commit or stash), then continue with setup.

Find the browse binary:

Check test framework (bootstrap if needed):

Create output directories:

mkdir -p .gstack/qa-reports/screenshots

{{LEARNINGS_SEARCH:query=qa testing bug regression flake fixture}}

Test Plan Context

Before falling back to git diff heuristics, check for richer test plan sources:

Project-scoped test plans: Check ~/.gstack/projects/ for recent *-test-plan-*.md files for this repo

setopt +o nomatch 2>/dev/null || true  # zsh compat
{{SLUG_EVAL}}
ls -t ~/.gstack/projects/$SLUG/*-test-plan-*.md 2>/dev/null | head -1

Conversation context: Check if a prior /plan-eng-review or /plan-ceo-review produced test plan output in this conversation
Use whichever source is richer. Fall back to git diff analysis only if neither is available.

Phases 1-6: QA Baseline

Record baseline health score at end of Phase 6 (per the Health Score Rubric in that section).

Output Structure

.gstack/qa-reports/
├── qa-report-{domain}-{YYYY-MM-DD}.md    # Structured report
├── screenshots/
│   ├── initial.png                        # Landing page annotated screenshot
│   ├── issue-001-step-1.png               # Per-issue evidence
│   ├── issue-001-result.png
│   ├── issue-001-before.png               # Before fix (if fixed)
│   ├── issue-001-after.png                # After fix (if fixed)
│   └── ...
└── baseline.json                          # For regression mode

Report filenames use the domain and date: qa-report-myapp-com-2026-03-12.md

Phase 7: Triage

Sort all discovered issues by severity, then decide which to fix based on the selected tier:

Quick: Fix critical + high only. Mark medium/low as "deferred."
Standard: Fix critical + high + medium. Mark low as "deferred."
Exhaustive: Fix all, including cosmetic/low severity.

Mark issues that cannot be fixed from source code (e.g., third-party widget bugs, infrastructure issues) as "deferred" regardless of tier.

Refresh learnings for the component/page where the bug lives

The top-of-skill learnings pull was keyed to "qa testing" broadly. Before the fix loop, re-pull learnings keyed to the component or page where the bug you're about to fix lives so prior fixes for the same component-shape surface.

Pick ONE keyword that names the buggy component or page. The keyword should be a noun: the failing component name, the page route base, or the feature noun. The keyword MUST be alphanumeric or hyphen only — no quotes, slashes, dots, colons, or whitespace. If your candidate has any of those, simplify to just the alphanumeric stem.

Worked examples (qa-specific): good keywords are checkout-button, signup-form, payment. Bad: tests are failing, <failing-test>, app/views/_checkout.html.erb.

~/.claude/skills/gstack/bin/gstack-learnings-search --query "<your-keyword>" --limit 5 2>/dev/null || true

If any learnings come back, name which one applies to the fix you're about to make in one sentence. If none come back, continue without reference — the absence is itself useful information.

Phase 8: Fix Loop

For each fixable issue, in severity order:

8a. Locate source

# Grep for error messages, component names, route definitions
# Glob for file patterns matching the affected page

Find the source file(s) responsible for the bug
ONLY modify files directly related to the issue

8b. Fix

Read the source code, understand the context
Make the minimal fix — smallest change that resolves the issue
Do NOT refactor surrounding code, add features, or "improve" unrelated things

8c. Commit

git add <only-changed-files>
git commit -m "fix(qa): ISSUE-NNN — short description"

One commit per fix. Never bundle multiple fixes.
Message format: fix(qa): ISSUE-NNN — short description

8d. Re-test

Navigate back to the affected page
Take before/after screenshot pair
Check console for errors
Use snapshot -D to verify the change had the expected effect

$B goto <affected-url>
$B screenshot "$REPORT_DIR/screenshots/issue-NNN-after.png"
$B console --errors
$B snapshot -D

8e. Classify

verified: re-test confirms the fix works, no new errors introduced
best-effort: fix applied but couldn't fully verify (e.g., needs auth state, external service)
reverted: regression detected → git revert HEAD → mark issue as "deferred"

8e.5. Regression Test

Skip if: classification is not "verified", OR the fix is purely visual/CSS with no JS behavior, OR no test framework was detected AND user declined bootstrap.

1. Study the project's existing test patterns:

Read 2-3 test files closest to the fix (same directory, same code type). Match exactly:

File naming, imports, assertion style, describe/it nesting, setup/teardown patterns The regression test must look like it was written by the same developer.

2. Trace the bug's codepath, then write a regression test:

Before writing the test, trace the data flow through the code you just fixed:

What input/state triggered the bug? (the exact precondition)
What codepath did it follow? (which branches, which function calls)
Where did it break? (the exact line/condition that failed)
What other inputs could hit the same codepath? (edge cases around the fix)

The test MUST:

Set up the precondition that triggered the bug (the exact state that made it break)
Perform the action that exposed the bug
Assert the correct behavior (NOT "it renders" or "it doesn't throw")
If you found adjacent edge cases while tracing, test those too (e.g., null input, empty array, boundary value)

Include full attribution comment:

// Regression: ISSUE-NNN — {what broke}
// Found by /qa on {YYYY-MM-DD}
// Report: .gstack/qa-reports/qa-report-{domain}-{date}.md

Test type decision:

Console error / JS exception / logic bug → unit or integration test
Broken form / API failure / data flow bug → integration test with request/response
Visual bug with JS behavior (broken dropdown, animation) → component test
Pure CSS → skip (caught by QA reruns)

Generate unit tests. Mock all external dependencies (DB, API, Redis, file system).

Use auto-incrementing names to avoid collisions: check existing {name}.regression-*.test.{ext} files, take max number + 1.

3. Run only the new test file:

{detected test command} {new-test-file}

4. Evaluate:

Passes → commit: git commit -m "test(qa): regression test for ISSUE-NNN — {desc}"
Fails → fix test once. Still failing → delete test, defer.
Taking >2 min exploration → skip and defer.

5. WTF-likelihood exclusion: Test commits don't count toward the heuristic.

8f. Self-Regulation (STOP AND EVALUATE)

Every 5 fixes (or after any revert), compute the WTF-likelihood:

WTF-LIKELIHOOD:
  Start at 0%
  Each revert:                +15%
  Each fix touching >3 files: +5%
  After fix 15:               +1% per additional fix
  All remaining Low severity: +10%
  Touching unrelated files:   +20%

If WTF > 20%: STOP immediately. Show the user what you've done so far. Ask whether to continue.

Hard cap: 50 fixes. After 50 fixes, stop regardless of remaining issues.

Phase 9: Final QA

After all fixes are applied:

Re-run QA on all affected pages
Compute final health score
If final score is WORSE than baseline: WARN prominently — something regressed

Phase 10: Report

Write the report to both local and project-scoped locations:

Local: .gstack/qa-reports/qa-report-{domain}-{YYYY-MM-DD}.md

Project-scoped: Write test outcome artifact for cross-session context:

{{SLUG_SETUP}}

Write to ~/.gstack/projects/{slug}/{user}-{branch}-test-outcome-{datetime}.md

Per-issue additions (beyond standard report template):

Fix Status: verified / best-effort / reverted / deferred
Commit SHA (if fixed)
Files Changed (if fixed)
Before/After screenshots (if fixed)

Summary section:

Total issues found
Fixes applied (verified: X, best-effort: Y, reverted: Z)
Deferred issues
Health score delta: baseline → final

PR Summary: Include a one-line summary suitable for PR descriptions:

"QA found N issues, fixed M, health score X → Y."

Phase 11: TODOS.md Update

If the repo has a TODOS.md:

New deferred bugs → add as TODOs with severity, category, and repro steps
Fixed bugs that were in TODOS.md → annotate with "Fixed by /qa on {branch}, {date}"

Additional Rules (qa-specific)

Clean working tree required. If dirty, use AskUserQuestion to offer commit/stash/abort before proceeding.
One commit per fix. Never bundle multiple fixes into one commit.
Only modify tests when generating regression tests in Phase 8e.5. Never modify CI configuration. Never modify existing tests — only create new test files.
Revert on regression. If a fix makes things worse, git revert HEAD immediately.
Self-regulate. Follow the WTF-likelihood heuristic. When in doubt, stop and ask.

Web App QA Testing and Bug Fixing

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