# AGENTS.md

Rules for any agent working in this repository.

## Always
1. **Read `.agents/PLAN.md` first** — project goals, architecture, and the
   **LOCKED DECISIONS** (Architectural Anchors) are binding.
2. **Follow the phased protocol** in `.agents/phases/`:
   - `todo/NN_name/` — pending phases (`00_phase.md` overview + `NN_task.md`
     task files; task sort order = execution order).
   - `complete/` — finished phases (read-only history).
   - New work is captured as a phase directory via the `phase-authoring`
     skill; code changes flow through the `phased-execution` skill (each task
     runs in a fresh subprocess behind the validation gate).
3. **Test before you ship:**
   - `./build.sh` — rebuild `dist/` (tests run against `dist/`, the
     deployed artifact — never test `src/` directly).
   - `npm test` — the Playwright E2E suite (pinned `@playwright/test`
     1.62.0; do not bump without re-checking the cached browser revision).
   - For any nginx/Dockerfile change: `./scripts/check-headers.sh`
     (Phase 03+).

## Never
- Modify `.agents/PLAN.md` except via an explicit user-approved change to the
  LOCKED DECISIONS (record the approval in the PLAN's review history).
- Modify anything in `.agents/phases/complete/`.
- Edit files in `.agents/phases/todo/` without asking the user first
  (phase rewrites are a `phase-authoring` action).
- Add runtime dependencies, CDNs, or a JS build toolchain (LOCKED: vanilla
  HTML/CSS/JS, flat `src/*.js`, `build.sh` hashing).
- Add real network I/O to the fake terminal (LOCKED: simulated output only —
  see Phase 02 and PLAN §2.5).
- Add `Strict-Transport-Security` inside the nginx container — TLS/HSTS are
  the Caddy edge's job (the container serves plain HTTP on 8080).

## Conventions
- Static site: edits in `src/` → `./build.sh` → `dist/` (hash-cached names).
  New root-level assets are picked up automatically by `build.sh`; nested
  directories are **not** (keep JS files flat in `src/`).
- Terminal modules: `terminal-commands.js` (canned data),
  `terminal-achievements.js`, `terminal-vim.js`, `terminal.js` (core) — load
  order is fixed in `index.html` (all `defer`); keep dependencies pointing
  only at earlier files.
- Commits: small, imperative subject; one logical change per commit.
- `dist/`, `node_modules/`, `test-results/`, `playwright-report/` are
  build/test artifacts — never edit them by hand.