# 0007 — Write core/instructions/testing.md ✅

## What to build

Create the testing conventions instruction file at `core/instructions/testing.md`. Plain markdown, no frontmatter. The agent reads this file on demand when writing or running tests, as directed by the content index in `providers/claude-code/CLAUDE.md`.

The file establishes four key rules: prefer integration tests over mocks; automate everything automatable; test observable end-state, not implementation internals; no test is better than a wrong test.

## Acceptance criteria

- [ ] File exists at `core/instructions/testing.md`
- [ ] Contains all four rules from the PRD Module 4 section
- [ ] Plain markdown with no frontmatter or schema
- [ ] In a new session, ask the agent to write a test requiring a mocked database — agent pushes back and proposes an integration test instead

## Blocked by

- 0004 — rewrite providers/claude-code/CLAUDE.md and retire global.md