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AGENTS.md · backnotprop/plannotator

AGENTS.md from backnotprop/plannotator: 2353 lines covering Project Structure, Server Runtimes, Installation, Environment Variables and more.

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About

The AGENTS.md file that backnotprop/plannotator (9,608 stars) keeps for coding agents. It has 2353 lines in 10 sections: Project Structure; Server Runtimes; Installation; Environment Variables; Guides in VS Code; Plan Review Flow; Code Review Flow; Ask AI Provider Defaults; Annotate Flow; Plannotator Inbox. Use it as a model for your own project's instructions.

Use cases: code-review, code-generation

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What's in it

An AGENTS.md file: instructions coding agents (Codex, Cursor, Copilot, Gemini CLI and others) read before working in a repo.

For
Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode, Claude Code
Length
2,353 lines
File
AGENTS.md

Sections

  1. Project Structure
  2. Server Runtimes
  3. Installation
  4. Environment Variables
  5. Guides in VS Code
  6. Plan Review Flow
  7. Code Review Flow
  8. Ask AI Provider Defaults
  9. Annotate Flow
  10. Plannotator Inbox

First lines (shown under the repo's Apache-2.0 license)

# Plannotator agent guidance

Plannotator is a plan review UI for Claude Code that intercepts `ExitPlanMode` via hooks, letting users approve or request changes with annotated feedback. It also provides code review for git diffs and annotation of arbitrary Markdown files.

This file is a map. The full guidance lives in focused guides under [`docs/agent-guides/`](docs/agent-guides/). Read the hard rules below, then the guide for the code or behavior you are changing. `CLAUDE.md` is a symlink to this file; `packages/ui/AGENTS.md` adds guidance scoped to `packages/ui/`.

## Hard rules (read before touching anything)

- **Reusing the document UI in the commercial Workspaces app?** Read [`packages/ui/README.md`](packages/ui/README.md) FIRST: an earlier from-scratch rebuild of this UI broke the app and was reverted. Do not rebuild the UI or recreate `packages/document-ui`; add a seam to `@plannotator/ui` (`configurePlannotatorUI()`), keep Plannotator's app unchanged, and never delete working code until a human confirms parity in the browser.
- **Two server runtimes change together.** An endpoint change goes into both the Bun server (`packages/server/`) and the Pi server (`apps/pi-extension/server/`); shared logic lives in `packages/shared/`. Only the Inbox is Bun-only. See [Server Runtimes](docs/agent-guides/project-and-development.md#server-runtimes).
- **Build order: review, then hook, then opencode.** `bun run --cwd apps/review build && bun run build:hook && bun run build:opencode`; building out of order copies stale HTML. See [Build](docs/agent-guides/project-and-development.md#build).
- **Tailwind `@source`.** A new directory with `.tsx` files that use Tailwind classes needs a matching `@source` entry in the app's `index.css`.
- **Testing Rules** (full list in [Testing Rules](docs/agent-guides/project-and-development.md#testing-rules)):
  - Tests and dev scripts never touch the real `~/.plannotator`, the real Inbox or user config: sandbox under a temp `PLANNOTATOR_DATA_DIR`, and mutate globals only inside tests with a restore.
  - Tests never open a browser: set `NO_BROWSER` from `tests/helpers/no-browser.ts`, never `PLANNOTATOR_BROWSER=none` (or another sentinel).
  - Tests never run the real GitHub CLI, and never signal an Inbox except through `tests/helpers/inbox-process.ts`.
  - Every test guards a behavior that can regress: no copy snapshots of prose, no round-trip prop tests, no implementation echo.
  - Test agent-facing instructions (tool text, skills, `--help`) clean room: a fresh agent with only that text, in a scratch folder outside this repo, given a real task. Judge what it does, not what it says.
- **No new Inbox keyboard shortcuts without the owner's approval** (see the Inbox shortcuts note in [Keyboard Shortcuts](docs/agent-guides/guides-and-shared-ui.md#keyboard-shortcuts)). Shortcuts elsewhere go through the shortcut registry.
- **Git:** never rebase or force-push a shared branch; merge main instead.
- **Releases:** follow [`.agents/skills/release/SKILL.md`](.agents/skills/release/SKILL.md).

## Topic guides

- [`project-and-development.md`](docs/agent-guides/project-and-development.md): repository map, server runtimes, installation, development, Testing Rules, build, marketing site.
- [`environment.md`](docs/agent-guides/environment.md): every environment variable and config-only setting.
- [`plan-review.md`](docs/agent-guides/plan-review.md): plan review flow, Guides in VS Code, Pi plan review and the Pi `plannotator` tool.
- [`claude-code-mod.md`](docs/agent-guides/claude-code-mod.md): the Claude Code hooks module (non-blocking flows, the `plannotator` tool, its Ask this session client and Inbox wake, version skew).
- [`opencode-t3-and-codex.md`](docs/agent-guides/opencode-t3-and-codex.md): OpenCode 2 tool, T3 Code, Codex Stop hook.
- [`code-review.md`](docs/agent-guides/code-review.md): code review flow and UI, Ask AI provider defaults, "Ask this session" (the session bridge and pull bridge).
- [`annotate.md`](docs/agent-guides/annotate.md): annotate flow, bundles, drafts, strict gates, live app annotation.
- [`inbox.md`](docs/agent-guides/inbox.md): index to the Plannotator Inbox guides (`inbox-*.md`).
- [`server-and-storage.md`](docs/agent-guides/server-and-storage.md): archive, Server API tables and guards, plan history, feedback archive, plan diff.
- [`guides-and-shared-ui.md`](docs/agent-guides/guides-and-shared-ui.md): portable Guided Reviews, data types, parser, annotation system, question blocks, WebMCP, shortcuts, sharing, settings, syntax highlighting.

## Where new docs go

Keep this file a map: add no feature detail here. Put a new section in the guide for its area (the list above): an env var in `environment.md`, an endpoint in the matching Server API table in `server-and-storage.md`, Inbox behavior in the matching `inbox-*.md` (and a line in `inbox.md` for a new Inbox guide), a shared UI or format change in `guides-and-shared-ui.md`. A new guide gets one line in the list above. `tests/agents-md-size.test.ts` fails when this file grows past its budget or links to a guide that does not exist.

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Stars
9,609
Forks
721
Open issues
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Last commit (this folder)
Oct 24, 2026 (6 days ago)
Last release
Oct 24, 2026 (7 days ago)

From GitHub (fetched Oct 24, 2026).

Details

License
Apache-2.0
First seen
Oct 24, 2026
Last checked
Oct 24, 2026

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AGENTS.md · backnotprop/plannotator. Agent Mart. https://agentmart.dev/templates/backnotprop-plannotator-agents-md (last updated 2026-10-24)