Borrowing it
Nothing to install: this file belongs to Nano-Nimbus/locus. 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/Nano-Nimbus/locus/main/CLAUDE.mdgit clone --depth 1 https://github.com/Nano-Nimbus/locusWrote 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/nano-nimbus/locus/claude-md)<a href="https://agentmods.dev/instructions/nano-nimbus/locus/claude-md"><img src="https://agentmods.dev/badge/instructions/nano-nimbus/locus/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/nano-nimbus/locus/claude-md"><img src="https://agentmods.dev/badge/instructions/nano-nimbus/locus/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 | $0.01280 | $0.01280 |
| Opus 5.5 | $0.00512 | $0.00512 |
| Sonnet 5.5 | $0.00256 | $0.00256 |
| Haiku 4.5 | $0.00128 | $0.00128 |
Grade A, and why
locus 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 1mo 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 — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
Guidance for Claude Code (claude.ai/code) working in this repository.
What Locus is
Locus is a hierarchical markdown memory system for autonomous AI agents (a "palace":
directory = room, file = knowledge, navigated on demand instead of loaded all at once).
It ships as four things: SKILL.md files for Claude Code (skills/claude/, the only
maintained set; other runtimes adapt these files rather than getting a vendored copy),
an MCP server (locus-mcp), a Python Agent SDK entrypoint (locus), and standalone
CLI tools for retrieval, conformance, and security. Current package version: 0.10.0.
For the full pitch, structure diagram, and contributor workflow see
README.md and CONTRIBUTING.md. This file only
covers what a coding agent needs to orient fast.
Module layout
Seven packages under locus/. Six of them have their own main.py;
locus/feedback/ is the exception, it has no CLI and no main.py:
| Module | Purpose |
|---|---|
locus/agent/ |
Agent SDK entrypoint (the locus CLI when no subcommand matches), run metrics |
locus/audit/ |
Palace health auditor (locus-audit CLI): scanner, scorer, report |
locus/conform/ |
OKF conformance: locus lint and locus index (rules, fixer, generators) |
locus/feedback/ |
Inferred disagreement-signal classifier consumed by the Locus skill layer (see spec/inferred-feedback.md); not imported by the Agent SDK runtime, no main.py |
locus/mcp/ |
MCP server (locus-mcp CLI): palace resolution, path safety, tool handlers |
locus/recall/ |
locus recall: SQLite FTS5 index shared with the memory_search MCP tool |
locus/security/ |
Ed25519 signing system (locus-security CLI): keys, taint, nonce, middleware |
Plus locus/cli.py (console-script dispatch, see below) and locus/utils.py
(shared helpers, e.g. slug_from_path).
Console scripts and dispatch
pyproject.toml defines four entry points: locus, locus-audit, locus-mcp,
locus-security.
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.
- 1mo ago Changed · -2 lines · +333 tokens per session 24f7ffccd1ed
- 1mo ago First seen · 92 lines · 947 tokens per session scan A 81f5817c305b
locus CLAUDE.md is an instructions file published in the GitHub repository Nano-Nimbus/locus (0 stars, last pushed 1mo ago), licensed MIT. It adds 1,280 tokens to every session, about $0.0051 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 2026-08-31.
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.