Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add Engine-Room-Games/after-effects-mcp --skill after-effectsgit 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/skills/engine-room-games/after-effects-mcp/after-effects)<a href="https://agentmods.dev/skills/engine-room-games/after-effects-mcp/after-effects"><img src="https://agentmods.dev/badge/skills/engine-room-games/after-effects-mcp/after-effects/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/skills/engine-room-games/after-effects-mcp/after-effects"><img src="https://agentmods.dev/badge/skills/engine-room-games/after-effects-mcp/after-effects.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 | $0.00089 | $0.03745 |
| Opus 5.5 | $0.00036 | $0.01498 |
| Sonnet 5.5 | $0.00018 | $0.00749 |
| Haiku 4.5 | $0.00009 | $0.00375 |
Grade A, and why
after-effects 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 today.
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 — 245 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Driving After Effects
You have direct control of a live After Effects session. The user sees every change immediately, and every tool call that changes something is a real undo step in their project. Work like a motion designer at the keyboard, not like a script that fires blind.
This file holds only what silently produces wrong output on any task. Each
subject sits behind it in a reference, loaded when a task reaches that subject
and never otherwise. From any client, ae_guide({topic: …}); loaded as a
skill, the file beside this one:
| When the task reaches… | Topic | File |
|---|---|---|
| keyframes, easing, rigging, expressions | animation |
references/animation.md |
| a shape layer and its Contents | shapes |
references/shapes.md |
| a text layer | text |
references/text.md |
| shots placed into a master comp, markers, retiming a shot | assembly |
references/assembly.md |
any raw ExtendScript for run_jsx — read it before writing the script |
extendscript-gotchas |
references/extendscript-gotchas.md |
| sound effects and beds | sound |
references/sound.md |
a .mogrt export, importing footage, or the solids a deleted comp leaves behind |
mogrt-and-footage |
references/mogrt-and-footage.md |
| a tool that fought back, and what to do with what you learned | issue-journal |
references/issue-journal.md |
| a call that behaves differently from what you remember | whats-new |
references/whats-new.md |
Two topics are siblings rather than references: style-guide, for capturing the
user's look, and ae-setup, for a connection that is not working.
The user can start this server read-only (only the tools that look) or with
run_jsx switched off. Either way the missing tools are simply absent from
your tool list, though this guidance still names them. When a task needs one
you do not have, tell the user it is switched off; do not route around it.
Read the house style first
get_house_style returns the project's style guide — palette, type, motion
defaults, layout rules — read from house-style.md beside the .aep. Call it
once at the start of any build task and follow it; it is the difference between
work that matches everything else the user has made and work that does not.
What ships with it
9 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- today Changed · +10 lines 665b1516b6e6
- 1mo ago Changed · -194 lines · +19 tokens per session 5426cc09801e
- 1mo ago Changed · +189 lines 59754504779e
- 2mo ago First seen · 240 lines · 70 tokens per session scan A 2a4125c8fe0d
after-effects is a skill published in the GitHub repository Engine-Room-Games/after-effects-mcp (38 stars, last pushed today), licensed MIT. It adds 89 tokens to every session and 3,745 once invoked, about $0.0004 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 2026-08-31.
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