Borrowing it
Nothing to install: this file belongs to ngerakines/atproto-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/ngerakines/atproto-skills/main/CLAUDE.mdgit clone --depth 1 https://github.com/ngerakines/atproto-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/ngerakines/atproto-skills/claude-md)<a href="https://agentmods.dev/instructions/ngerakines/atproto-skills/claude-md"><img src="https://agentmods.dev/badge/instructions/ngerakines/atproto-skills/claude-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/ngerakines/atproto-skills/claude-md"><img src="https://agentmods.dev/badge/instructions/ngerakines/atproto-skills/claude-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 | $0.03236 | $0.03236 |
| Opus 5 | $0.01618 | $0.01618 |
| Sonnet 5 | $0.00647 | $0.00647 |
| Haiku 4.5 | $0.00324 | $0.00324 |
Grade A, and why
atproto-skills CLAUDE.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 12d 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 — 170 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Authoring Guide: atproto-skills
This repository is a Claude Code plugin that packages ATProtocol-specific skills. The goal is that any agent doing ATProto work — designing lexicons, resolving DIDs, writing XRPC clients, decoding DAG-CBOR, auditing OAuth flows — can load the right specialized knowledge on demand instead of relying on generic training-time recall.
This file is the authoring guide. It is also loaded into the context of any agent working inside this repo, so its conventions apply to every skill added here.
1. Skill anatomy
Every skill is a single directory under skills/. The directory name is the skill name.
skills/<skill-name>/
├── SKILL.md ← required. Frontmatter + body.
├── references/ ← optional. Long-form material loaded on demand.
├── scripts/ ← optional. Deterministic helpers (validators, parsers).
└── assets/ ← optional. Templates copied into user outputs. Not loaded into context.
SKILL.md frontmatter:
| Field | Required | Notes |
|---|---|---|
name |
yes | Must match the directory. kebab-case. <30 chars. |
description |
yes | The trigger mechanism — see §3. |
version |
no | Semver. Conventional but not enforced. |
Body conventions:
- Keep
SKILL.mdunder 500 lines. Spill anything longer intoreferences/and link to it. - Lead with When to use and What this skill provides. Put the Procedure next. Everything else is supporting material.
- Reference MCP tools by name (see §6) rather than duplicating what they already do.
The canonical starter is templates/SKILL.md.template. Copy it, don't retype it.
Polyglot skills (optional shape)
When a skill's core topic is language-neutral but its idioms differ meaningfully across ecosystems (CIDs, DAG-CBOR, XRPC client design, OAuth flows), use the polyglot layout instead of references/:
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.
- 12d ago First seen · 170 lines · 3,236 tokens per session scan A 3c5c1f572481
atproto-skills CLAUDE.md is an instructions file published in the GitHub repository ngerakines/atproto-skills (50 stars, last pushed 4mo ago), licensed MIT. It adds 3,236 tokens to every session, about $0.0162 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.
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