Borrowing it
Nothing to install: this file belongs to sergebulaev/facebook-skills. 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/sergebulaev/facebook-skills/main/AGENTS.mdgit clone --depth 1 https://github.com/sergebulaev/facebook-skillsWrote 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/sergebulaev/facebook-skills/agents-md)<a href="https://agentmods.dev/instructions/sergebulaev/facebook-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/sergebulaev/facebook-skills/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/sergebulaev/facebook-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/sergebulaev/facebook-skills/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 | $0.02211 | $0.02211 |
| Opus 5.5 | $0.00884 | $0.00884 |
| Sonnet 5.5 | $0.00442 | $0.00442 |
| Haiku 4.5 | $0.00221 | $0.00221 |
Grade A, and why
facebook-skills 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 13d 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 — 150 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Project conventions - facebook-skills
This file is for any Codex agent working on this repository. Read it before making changes. Conventions here are mandatory unless the user asks otherwise.
Versioning
- Single source of truth:
.codex-plugin/plugin.json,.agents/plugins/marketplace.json,.claude-plugin/plugin.json, and.claude-plugin/marketplace.json. Plugin manifests must always match on package name and version; marketplace entries must point to the same package; author, license, homepage, and the public skill-bundle description must stay aligned. - Keep
AGENTS.mdandCLAUDE.mdaligned when changing shared project rules. Codex-specific workflow details belong here; Claude-specific details belong inCLAUDE.md. - Codex marketplace install uses
.codex-marketplace/facebook-skills/. Do not edit that generated package by hand. Update the root files first, then runpython3 scripts/sync_codex_marketplace.py. - Default: bump the PATCH segment (3rd level,
0.0.X). This is the automatic behavior for every shippable commit, regardless of how large the diff feels. Skill renames, lib API breaks, new features: still PATCH by default. - Only bump MINOR or MAJOR when the user explicitly asks for a higher rank ("this is minor", "make it 2.0", "bump major"). Do not promote on your own initiative even if semver textbook says so.
- After bumping, two steps are required:
- Tag the commit:
git tag -a v<X.Y.Z> -m "..."+git push origin v<X.Y.Z> - Publish a GitHub Release for the tag:
gh release create v<X.Y.Z> --title "v<X.Y.Z>" --notes "<changelog>" --latestA tag alone does NOT update the README release badge. The shields.io badge reads from the Releases API, not from raw tags. Skipping step 2 leaves it stale.
- Tag the commit:
Commits
- Primary author must be Sergey: every
git commitneeds--author="Sergey Bulaev <[email protected]>". Verify withgit log -1 --format='%an <%ae>'before pushing. - Co-author trailers are fine when appropriate.
- Verify locally before push: build never breaks, no broken refs in
SKILL.md, library smoke import passes.
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.
- 13d ago Changed · +30 lines · +620 tokens per session 48b18835fb4c
- 1mo ago Changed · +2 lines · +44 tokens per session 0fd404dc58d2
- 1mo ago First seen · 118 lines · 1,547 tokens per session scan A 2d301f00b58f
facebook-skills AGENTS.md is an instructions file published in the GitHub repository sergebulaev/facebook-skills (71 stars, last pushed yesterday), licensed MIT. It adds 2,211 tokens to every session, about $0.0088 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
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