Borrowing it
Nothing to install: this file belongs to heristop/leclap. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/heristop/leclap/main/AGENTS.mdgit clone --depth 1 https://github.com/heristop/leclapWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/heristop/leclap/agents-md)<a href="https://agentmods.dev/instructions/heristop/leclap/agents-md"><img src="https://agentmods.dev/badge/instructions/heristop/leclap/agents-md/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/heristop/leclap/agents-md"><img src="https://agentmods.dev/badge/instructions/heristop/leclap/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.03523 | $0.03523 |
| Opus 5.5 | $0.01409 | $0.01409 |
| Sonnet 5.5 | $0.00705 | $0.00705 |
| Haiku 4.5 | $0.00352 | $0.00352 |
Grade A, and why
leclap AGENTS.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 126 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
Guidance for AI agents working in the leclap monorepo. This is the canonical, tool-agnostic agent guide (CLAUDE.md imports it). Read it first.
Project overview
A template-based, cross-platform FFmpeg video composer. A JSON template describes a video's structure (sections, filters, music); the engine compiles it into a finished video. The same core runs on Node.js, in the browser (WebAssembly), and in React Native.
- High-level intro:
README.md - Design system (brand, colors, typography):
DESIGN.md - Architecture & design patterns:
docs/architecture.md - Template JSON reference:
docs/template-configuration.md; what each option looks like:docs/gallery.md(snapshot sheets, regenerate withbash docs/gallery/make-gallery.sh) - Registered effect contracts, custom catalogs and authoring workflow:
docs/effects-configuration.md(regenerate tables withpnpm docs:effects). - Engine configuration (ProjectConfig, env vars, encoder tiers):
docs/engine-configuration.md - Browser agents in the web builder (WebMCP tools, confirmations, security):
docs/webmcp.md - MCP runtime (media/output roots, trusted entry/catalog/browser, deadlines and cache):
packages/leclap-mcp/README.md - FFmpeg detection/fallback:
docs/architecture.md
Repository layout
pnpm workspaces (apps/*, packages/*, plus examples/llm-remotion-title); no turbo/nx. The repo root is a private orchestrator (leclap) holding only shared dev tooling and scripts — not a publishable package. The published artifacts are ffmpeg-video-composer (the engine), @leclap/cli (the leclap command), and @leclap/mcp; the rest is private.
| Path | Package | What it is |
|---|---|---|
. |
leclap (private) |
Workspace root — shared tooling (vp, vitest) and orchestration scripts only. |
packages/ffmpeg-video-composer |
ffmpeg-video-composer |
The composition library (programmatic API), Node + browser/WASM. The heart of the repo. |
packages/leclap-cli |
@leclap/cli |
The leclap CLI (citty): init scaffolder, render, diagnose. Consumes ffmpeg-video-composer. |
packages/leclap-mcp |
@leclap/mcp |
MCP server exposing the engine as agent-callable tools (schema/validate/compose/probe) over stdio. Consumes ffmpeg-video-composer. |
packages/leclap-creative-kit |
@leclap/creative-kit (private) |
Shared templates, partials, fonts, media, and bundled assets. |
examples/llm-remotion-title |
leclap-json-effects-example (private) |
JSON effects / Remotion integration example; typechecked separately. |
packages/ffmpeg-engine |
(cargo crate) | Embedded FFmpeg engine (Rust + uniffi) for on-device compiles; built via scripts/ffmpeg/. |
apps/leclap-expo |
@leclap/expo |
Expo / React Native app — on-device native-engine compiles, Tamagui UI (reference). |
apps/leclap-web |
@leclap/web |
React 19 + Vite + Tailwind web app — in-browser FFmpeg via WASM (reference). |
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 10d ago Changed · +2 tokens per session bd53c2f6e282
- 11d ago Changed · +2 tokens per session 9a0bfe2514d6
- 14d ago Changed 2be4cfc89b6e
- 15d ago Changed · +1 lines · +43 tokens per session b029d7ee17d1
- 16d ago Changed · +1 lines · +51 tokens per session 96a8bb8da25d
- 20d ago Changed · +8 tokens per session 2306213ed543
- 21d ago Changed · +13 lines · +551 tokens per session e17116311b9e
- 24d ago Changed · +14 lines · +458 tokens per session 83971b21e66b
- 1mo ago Changed · +30 tokens per session 91f4cd216c4a
- 1mo ago First seen · 97 lines · 2,378 tokens per session scan A bd31284e7e21
leclap AGENTS.md is an instructions file published in the GitHub repository heristop/leclap (36 stars, last pushed 4d ago), licensed MIT. It adds 3,523 tokens to every session, about $0.0141 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other instructions, from other repositories
mcp-react-native-toolkit copilot-instructions.md
Copilot instructions for ItamiForge/mcp-react-native-toolkit, covering github copilot (vs code) instructions, project context, core rules, api validation and best practices.
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).