Borrowing it
Nothing to install: this file belongs to Engine-Room-Games/after-effects-mcp. 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/Engine-Room-Games/after-effects-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/Engine-Room-Games/after-effects-mcpWrote 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/engine-room-games/after-effects-mcp/claude-md)<a href="https://agentmods.dev/instructions/engine-room-games/after-effects-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/engine-room-games/after-effects-mcp/claude-md.svg" alt="Measured on agentmods" 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 | $0.29765 | $0.29765 |
| Opus 5 | $0.14882 | $0.14882 |
| Sonnet 5 | $0.05953 | $0.05953 |
| Haiku 4.5 | $0.02976 | $0.02976 |
Grade C, and why
after-effects-mcp CLAUDE.md scanned grade C with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Recursive force deletehighDestructive command
rm -rf with a variable or a broad path is one typo away from removing the wrong tree.
14. Missing dependency: `rm -rf …/games.engine-room.ae-mcp/node_modules/ws`, restart AE. The panel shows "cannot start — the ws module is missing" with the fix in its log, rather than "starting…". `check_setup` → `panelD Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
6. **Reload in AE** (optional, dev only) — `curl -X POST http://127.0.0.1:7777/reload-jsx` re-`$.evalFile`s the bundle without restarting AE. How it starts
The opening of the file, as written. The whole thing — 771 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Claude development guide — after-effects-mcp
This file is for future Claude Code sessions working in this repo. Humans reading it: see README.md for the user-facing intro.
What this project is
An MCP server that lets an LLM drive Adobe After Effects 2026: comps, layers, transforms, keyframes (with full interpolation/easing/tangent control), expressions, effects, text, shapes, masks, markers, footage import, audio cue placement, comp snapshots and diffs, Motion Graphics template export, one-off screenshots and contact sheets, bulk batches. 74 tools. macOS and Windows — the only two platforms AE runs on.
It ships five ways, and the ordering below is deliberate — it goes from least to most that the user has to already have installed:
| For | Needs | |
|---|---|---|
.mcpb bundle |
Claude Desktop | nothing — Desktop runs it on the Node it ships |
| Signed binary | any client, no Node | download and unzip |
| npm package | any client | Node 22+ |
| Claude Code plugin | Claude Code | this repo added as a marketplace |
| git checkout | development | the lot |
Nothing here is Claude-only by design. Skills and slash commands exist only in Claude's clients, so anything written only there reaches maybe half the users. The cross-cutting knowledge is carried by the MCP instructions field, MCP prompts, MCP resources and the ae_guide tool — all four are generated from the same source, and the Claude Code skills are one more generated output rather than the original. See "Guidance and how it reaches an agent" below.
How the pieces talk
Claude / MCP client
│ stdio (JSON-RPC)
▼
packages/mcp-server (Node/TS)
│ HTTP POST /op + WS /events
▼ (127.0.0.1:7777)
packages/ae-panel (CEP extension, installed into AE)
│ CSInterface.evalScript
▼
ExtendScript inside AE (bundle.jsx = concat of packages/jsx/*.jsx)
│ AE scripting API
▼
After Effects
The MCP server is stateless except for an in-memory JobManager, the SnapshotStore and the write queue. The panel is the only thing that talks to AE; it holds a Promise-chain mutex around evalScript because ExtendScript is single-threaded and concurrent calls would interleave. That mutex is necessary and not sufficient — see "Serializing writes" below.
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.
- 2d ago Changed · +404 lines · +16,690 tokens per session d2071d6e64e0
- 8d ago First seen · 367 lines · 13,075 tokens per session scan C 8ccf0ece3e6b
after-effects-mcp CLAUDE.md is an instructions file published in the GitHub repository Engine-Room-Games/after-effects-mcp (7 stars, last pushed 2d ago), licensed MIT. It adds 29,765 tokens to every session, about $0.1488 per session on Opus 5. A static security scan graded it C with 2 findings (recursive force delete, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
Other instructions, from other repositories
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
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.
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 oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
spec-kit AGENTS.md
AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.