kandev/.agents/skills/qa/SKILL.md

name, description

name	description
qa	Verify a feature works after implementation. Actively try to break it — edge cases, error paths, integration wiring, and real usage flows.

QA

Verify that a feature works as intended after implementation. Assume bugs exist and hunt for them.

Mindset: you are not confirming it works — you are discovering where it breaks.

Steps

1. Understand the intent

Read the task description, PR, or recent commits to understand what was built and what it should do. Identify:

• The expected behavior (happy path)
• System boundaries (user input, API endpoints, external data)
• Integration points (what calls what, data flow end-to-end)

2. Trace the wiring

Before testing behavior, verify the feature is actually connected:

• Exports are imported and used (not just defined)
• API routes have consumers (frontend calls them, or tests exercise them)
• Data flows end-to-end: input -> handler -> storage -> response -> display
• New config/env vars are documented and have defaults

If something is orphaned or unwired, stop and report it — no point testing disconnected code.

3. Test the happy path

Run the feature as a user would. For backend changes, call the API. For frontend changes, trace the UI flow. For both, follow the full path:

• Does the basic use case work?
• Does the response/output match expectations?
• Is the data persisted correctly?

4. Try to break it

Systematically test these categories (skip what doesn't apply):

Boundary values:

• Empty input, nil/null, zero, negative numbers, max values
• Empty arrays/maps, single element, very large collections
• Strings: empty, whitespace-only, special characters, very long

Error paths:

• What happens when dependencies fail (DB down, API timeout, invalid response)?
• Are errors surfaced clearly or silently swallowed?
• Does the system recover or get stuck in a bad state?

Concurrency:

• What happens with simultaneous requests to the same resource?
• Race conditions: create/update/delete at the same time
• Does it handle duplicate submissions?

Authorization:

• Can the feature be accessed without proper auth?
• Does it respect permission boundaries?

5. Verify test coverage

Check that the implementation has tests covering the behaviors you just verified:

• Are the happy path and key error paths tested?
• Are edge cases from step 4 covered?
• If tests are missing, write them using /tdd

6. Report

Summarize what was tested and what was found:

Verified working:

• List of behaviors confirmed working

Issues found:

• file:line - description, how to reproduce, severity (blocker/suggestion)

Missing test coverage:

• Behaviors that work but have no automated test

Verdict: Feature complete / Has issues — fix before merge