Borrowing it
Nothing to install: this file belongs to fernandogarzaaa/chimeralang-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/fernandogarzaaa/chimeralang-mcp/main/AGENTS.mdgit clone --depth 1 https://github.com/fernandogarzaaa/chimeralang-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/fernandogarzaaa/chimeralang-mcp/agents-md)<a href="https://agentmods.dev/instructions/fernandogarzaaa/chimeralang-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/fernandogarzaaa/chimeralang-mcp/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/fernandogarzaaa/chimeralang-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/fernandogarzaaa/chimeralang-mcp/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 | $0.02264 | $0.02264 |
| Opus 5 | $0.01132 | $0.01132 |
| Sonnet 5 | $0.00453 | $0.00453 |
| Haiku 4.5 | $0.00226 | $0.00226 |
Grade A, and why
chimeralang-mcp 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 8d 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 — 181 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Codex Agent Guide — chimeralang-mcp
chimera_version: 0.8.1 — keep this in sync with
pyproject.tomland.claude/skills/chimera/SKILL.md.
This file is the Codex-readable adapter of the chimera skill. The canonical version lives at .claude/skills/chimera/SKILL.md; this is the same routing matrix in the location Codex actually walks.
When Codex is operating inside this repository, follow these rules.
When to invoke chimeralang-mcp
The chimeralang-mcp server (currently 0.8.1) exposes 51 tools. Pick the smallest correct subset for the user's actual intent — never invoke all of them.
Skip chimera tools entirely if:
- Prompt is
< 200chars and has no attached document/log/history. - The user is debugging chimeralang-mcp itself (don't pre-compress the thing you're trying to read).
- The user is asking a meta question about tools (definitions, schemas).
- The user said "skip chimera" or "raw output only".
Engage chimera tools otherwise — the cost-saving compounds quickly.
Routing matrix — prompt pattern → tool
| Trigger | First-choice tool | Notes |
|---|---|---|
| Single doc/code blob > 500 chars | chimera_optimize |
60–75% reduction; pass preserve_code=true to keep fenced blocks. |
| Long conversation history | chimera_compress |
Proportional truncation. |
| Both docs + history | chimera_fracture |
One call, quality gate, prefer over chaining. |
| Build/test/install log | chimera_log_compress |
Errors/warnings verbatim, body abridged. |
| Stable system block reused across SDK calls | chimera_cache_mark |
Lossless 75–90% via Anthropic prompt cache. |
| Multiple chimera calls at once | chimera_batch |
Saves round-trips. |
| Recurring per-turn cost surfacing | chimera_overhead_audit |
Quantifies system-prompt + tool-def overhead. |
| Inspect repeated tool calls | chimera_dedup_lookup |
Populated by the PostToolUse hook. |
| End-of-session totals | chimera_session_report |
Already auto-fired by Stop hook. |
| LLM-free extractive summary | chimera_summarize |
Deterministic, no API call. |
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.
- 8d ago First seen · 181 lines · 2,264 tokens per session scan A 7b2aff397fb3
chimeralang-mcp AGENTS.md is an instructions file published in the GitHub repository fernandogarzaaa/chimeralang-mcp (1 stars, last pushed 3mo ago), licensed MIT. It adds 2,264 tokens to every session, about $0.0113 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 2026-08-31.
Other instructions, from other repositories
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.
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).
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).
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.
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.