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 agentmods add instructions/ronak-create/fablecut/agents-mdgit clone --depth 1 https://github.com/ronak-create/FableCutWhat 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 | $0.00256 | $0.00256 |
| Opus 5 | $0.00128 | $0.00128 |
| Sonnet 5 | $0.00051 | $0.00051 |
| Haiku 4.5 | $0.00026 | $0.00026 |
Grade A, and why
FableCut 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 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.
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.
What it actually says
Working with FableCut
The complete agent manual is in CLAUDE.md. Read it before changing the project schema, using the MCP tools, or editing the timeline. This file exists so agents that look for the cross-tool AGENTS.md convention, including OpenCode and Codex, find the same source of truth without duplicating it.
Project constraints
- Keep FableCut zero-runtime-dependency and standard-library only.
- Keep preview and export on the same compositor path.
- Prefer small, focused changes and preserve the existing terse browser-native style.
- If a schema, prop, text animation, API, or MCP surface changes, update
CLAUDE.mdand the EnglishREADME.mdin the same change. - Run
node --check server.js && node --check app.js && node --check mcp-server.jsbefore opening a PR.
MCP entry point
The local MCP server is mcp-server.js. It can be started by any stdio-capable MCP client:
node /absolute/path/to/FableCut/mcp-server.js
Use the existing CLAUDE.md recipes and tool descriptions rather than inventing a second protocol or schema.
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 First seen · 22 lines · 256 tokens per session scan A 85506972106a
FableCut AGENTS.md is an instructions file published in the GitHub repository ronak-create/FableCut (643 stars, last pushed 4d ago), licensed MIT. It adds 256 tokens to every session, about $0.0013 per session on Opus 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
openscreen AGENTS.md
Instructions for getopenscreen/openscreen, covering agents.md, setup commands, development principles, project layout and code style.
VChart AGENTS.md
Instructions for VisActor/VChart, covering vchart 工程基准, 编码习惯, 文档规范 and 优先级.
open-edit AGENTS.md
Instructions for veedstudio/open-edit, covering agents.md, to run a video, how the pieces relate, hard rules (do not drift — these protect output quality) and conventions.
erm AGENTS.md
Instructions for dougcalobrisi/erm, covering agents.md — erm, install, fallback (no uv on path), use — the iterate loop and tune — five knob clusters.
movi-player AGENTS.md
Instructions for MrUjjwalG/movi-player, covering agents.md — movi-player for ai coding assistants, 1. what this is, 2. package entry points, 3. architecture map and 4. the web component .
leclap AGENTS.md
Instructions for heristop/leclap, covering agents.md, project overview, repository layout, setup and commands.