ateles: Instructions file for Claude Code

CLAUDE.md

ateles CLAUDE.md is an instructions file for Claude Code from markmhendrickson/ateles. It costs 18,181 tokens per session, scanned C, original, MIT.

A set of project instructions for Claude Code covering plan maintenance, session continuity, and working rules.

In plain words
What is it for?
It is for controlling how Claude Code maintains plans, handles session state, and follows repository-specific procedures.
Why use it?
It helps an AI coding assistant keep work attached to the right project plan and preserve important instructions between sessions.

Instructions file for Claude Code

Written for Claude Code: SessionStart hook event. Also seen: reads .claude/ paths; mentions CLAUDE.md; mentions subagents.

This is markmhendrickson/ateles's own configuration. It tells Claude Code how to work on ateles itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything ateles configures →

Reuse

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.

Copy the file
curl -O https://raw.githubusercontent.com/markmhendrickson/ateles/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/markmhendrickson/ateles

Made for: Claude Code.

Wrote 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.

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README.md
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Your own site
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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.

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Per session 18,181 This file is loaded in full into every session.
When invoked 18,181 The same file — it is already loaded in full.
Security scan C 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce 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

Measured 12d ago against content hash 00cffc925ab4, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

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
CLAUDE.md · 315 lines

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:

  1. Resolve the matching plan: retrieve entities against the operator's prod Neotoma instance (whichever connected Neotoma server targets it), with entity_type: plan and a search for 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.
  2. If no existing plan fits, create one (/update-plan skill) and bind to it.
  3. 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 decisions or todos, RE-READ the current field and MERGE. correct replaces 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 status to "done" in todos, with relevant entity IDs, file paths, or PR numbers in a notes field.
  • Never mark a task or todo done while citing a commit, branch, file, or PR that does not resolve. Verify the artifact exists first (git cat-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 decisions map. One sentence, snake_case key.
  • When blockers change (something unblocked, something newly blocked) — correct next_steps to reflect the current state.
  • When a new actionable task is identified — create a task entity and link it PART_OF the bound plan. Use the update-tasks skill for field values and priority mapping.
  • When a daemon, entity, or file is renamed — correct any stale references in body, decisions, and todos in the same turn the rename happens.

Read the full file on GitHub · 315 lines

Changes

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.

  1. 12d ago Changed · +52 tokens per session 00cffc925ab4
  2. 26d ago Changed · +4 lines · +1,013 tokens per session scan A → C aa1a4ef66b51
  3. 27d ago Changed · +405 tokens per session ab9c0ff7c38a
  4. 29d ago Changed · +4 lines · +1,034 tokens per session 68cb047f2d07
  5. 1mo ago Changed · +15 lines · +1,616 tokens per session 905b04db796e
  6. 1mo ago Changed · +3 lines · +801 tokens per session bb2e364c55f6
  7. 1mo ago Changed · +93 tokens per session a81ed31dd9f6
  8. 1mo ago Changed · +64 lines · +3,495 tokens per session 140f5f3ab594
  9. 1mo ago Changed · +1 lines · +197 tokens per session 93a5cae437f0
  10. 1mo ago First seen · 224 lines · 9,475 tokens per session scan A c472988e6b05

Subscribe to this mod's changes

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.

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