Borrowing it
Nothing to install: this file belongs to markmhendrickson/ateles. 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/markmhendrickson/ateles/main/CLAUDE.mdgit clone --depth 1 https://github.com/markmhendrickson/atelesWrote 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/markmhendrickson/ateles/claude-md)<a href="https://agentmods.dev/instructions/markmhendrickson/ateles/claude-md"><img src="https://agentmods.dev/badge/instructions/markmhendrickson/ateles/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/markmhendrickson/ateles/claude-md"><img src="https://agentmods.dev/badge/instructions/markmhendrickson/ateles/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 | $0.18181 | $0.18181 |
| Opus 5.5 | $0.07272 | $0.07272 |
| Sonnet 5.5 | $0.03636 | $0.03636 |
| Haiku 4.5 | $0.01818 | $0.01818 |
Grade C, and why
ateles CLAUDE.md scanned grade C with 1 finding 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.
Reaches for credential fileshighPrivilege escalation
SSH keys, cloud credentials, git-credentials, .npmrc, /etc/shadow: reading these is how a config file becomes a credential leak.
- **`credential_read_guard.py`** (PreToolUse: `Bash|Read|Grep|Glob`) — an accidental-leak tripwire, not a boundary against an agent that tries (shell parsing cannot be made complete; known limits are recorded in the hook How it starts
The opening of the file, as written. The whole thing — 315 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Ateles — Claude Code Project Instructions
How to read a
<!-- CONFLICT -->marker. A few rules below are marked as deliberately unresolved: two rules that pull against each other, kept as they are because deciding which framing governs is the operator's call, not a merge's. Never resolve one by editing prose — reword neither bullet, delete neither, and do not collapse the pair into one. Each marker states both framings and what to do in the meantime, so it works without network access to the issue it cites.
Plan and task maintenance (automatic)
Each session maintains the Neotoma plan entity that matches its own workstream — never a fixed, hardcoded plan. The swarm-architecture plan ent_99ace4dd6673aa36ed08b1fe ("Ateles Agent Swarm Architecture") is the plan for swarm-architecture work only. Unrelated workstreams (tax prep, Neotoma release engineering, website, cloud hosting, etc.) each have their own plan and MUST NOT write into the swarm plan. Writing one workstream's decisions/todos into another's plan is the collision that corrupted this plan in June 2026.
Select the bound plan once per session, as soon as the workstream is clear:
- Resolve the matching plan: retrieve entities against the operator's prod Neotoma instance (whichever connected Neotoma server targets it), with
entity_type: planand asearchfor the workstream; pick the closest match. If the target instance can't be established unambiguously — no connected server clearly targets the operator's prod instance, or several are connected and the target is ambiguous — stop and ask rather than write. - If no existing plan fits, create one (
/update-planskill) and bind to it. - Maintain only that bound plan for the rest of the session.
Apply these rules on every turn, without being asked — to the bound plan:
- Before correcting
decisionsortodos, RE-READ the current field and MERGE.correctreplaces the entire field, so add or update only the keys/items you authored and preserve every entry already present. NEVER rebuild a field from a stale in-memory copy — that silently deletes other sessions' entries. If the field changed since you last read it, re-read and re-merge before writing. - When a todo item is completed — correct its
statusto"done"intodos, with relevant entity IDs, file paths, or PR numbers in anotesfield. - Never mark a task or todo
donewhile citing a commit, branch, file, or PR that does not resolve. Verify the artifact exists first (gitcat-file/ls-remote, GitHub). Unverifiable completion claims are the second failure mode that corrupted this plan in June 2026. - When a decision is settled — add or correct one entry in the
decisionsmap. One sentence, snake_case key. - When blockers change (something unblocked, something newly blocked) — correct
next_stepsto reflect the current state. - When a new actionable task is identified — create a
taskentity and link itPART_OFthe bound plan. Use theupdate-tasksskill for field values and priority mapping. - When a daemon, entity, or file is renamed — correct any stale references in
body,decisions, andtodosin the same turn the rename happens.
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 Changed · +52 tokens per session 00cffc925ab4
- 26d ago Changed · +4 lines · +1,013 tokens per session scan A → C aa1a4ef66b51
- 27d ago Changed · +405 tokens per session ab9c0ff7c38a
- 29d ago Changed · +4 lines · +1,034 tokens per session 68cb047f2d07
- 1mo ago Changed · +15 lines · +1,616 tokens per session 905b04db796e
- 1mo ago Changed · +3 lines · +801 tokens per session bb2e364c55f6
- 1mo ago Changed · +93 tokens per session a81ed31dd9f6
- 1mo ago Changed · +64 lines · +3,495 tokens per session 140f5f3ab594
- 1mo ago Changed · +1 lines · +197 tokens per session 93a5cae437f0
- 1mo ago First seen · 224 lines · 9,475 tokens per session scan A c472988e6b05
ateles CLAUDE.md is an instructions file published in the GitHub repository markmhendrickson/ateles (5 stars, last pushed yesterday), licensed MIT. It adds 18,181 tokens to every session, about $0.0727 per session on Opus 5.5. A static security scan graded it C with 1 finding (reaches for credential files). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
Other instructions, from other repositories
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).
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.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
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.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deno copilot-instructions.md
Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.