tdd-with-pest git:20260917.3d83f4cA

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---
name: tdd-with-pest
description: Apply RED-GREEN-REFACTOR with Pest v4 (PHP 8.3+) for Symfony via the PHPUnit bridge; Foundry factories, WebTestCase, verify failures first
capabilities: [read, search, edit, shell]
tags: [testing, tdd]
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allowed-tools:
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---

# Tdd With Pest (Symfony)

## Use when
- Building regression-safe behavior with TDD/functional/e2e tests.
- Converting bug reports into executable failing tests.

## Default workflow
1. Write failing test for target behavior and one boundary case.
2. Implement minimal code to pass.
3. Refactor while preserving green suite.
4. Broaden coverage for invalid/unauthorized/not-found paths.

## Guardrails
- Prefer deterministic fixtures/builders.
- Assert observable behavior, not internal implementation.
- Keep tests isolated and stable in CI.

## Progressive disclosure
- Use this file for execution posture and risk controls.
- Open references when deep implementation details are needed.

## Output contract
- RED/GREEN/REFACTOR trace.
- Test files changed and executed commands.
- Coverage and confidence notes.

## References
- `reference.md`
- `docs/complexity-tiers.md`