Borrowing it
Nothing to install: this file belongs to kasssandr/archilles. 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/kasssandr/archilles/main/AGENTS.mdgit clone --depth 1 https://github.com/kasssandr/archillesWrote 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/kasssandr/archilles/agents-md)<a href="https://agentmods.dev/instructions/kasssandr/archilles/agents-md"><img src="https://agentmods.dev/badge/instructions/kasssandr/archilles/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/kasssandr/archilles/agents-md"><img src="https://agentmods.dev/badge/instructions/kasssandr/archilles/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 | $0.02045 | $0.02045 |
| Opus 5.5 | $0.00818 | $0.00818 |
| Sonnet 5.5 | $0.00409 | $0.00409 |
| Haiku 4.5 | $0.00204 | $0.00204 |
Grade A, and why
archilles 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 24d 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 — 149 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
This file provides guidance to Codex when working with code in this repository.
Project Overview
ARCHILLES is a privacy-first, local-first RAG (Retrieval-Augmented Generation) system for semantic search across Calibre e-book libraries. It provides hybrid vector+BM25 search with academic-grade citations, MCP integration for Claude Desktop; it will provide MCP integration for other LLMs soon, and finally a Streamlit web UI.
Note for Codex: ARCHILLES cannot currently be consumed via MCP from Codex — local MCP servers are not supported there. If that policy changes, wiring it up is worth a new attempt.
Commands
Installation
pip install -r requirements.txt
Indexing
python scripts/rag_demo.py index "/path/to/book.pdf" --book-id "AuthorName"
python scripts/batch_index.py --tag "Your-Tag" [--dry-run] [--skip-existing]
python scripts/scriptor_prepare.py --tag "Your-Tag" [--dry-run] [--no-index] # Scriptor bundles
Searching
python scripts/rag_demo.py query "search term" [--mode hybrid|semantic|keyword]
python scripts/rag_demo.py query "text" --language de --tag-filter History
python scripts/rag_demo.py stats
python scripts/rag_demo.py list-indexed
Web UI
streamlit run scripts/web_ui.py
MCP Server (Claude Desktop)
python mcp_server.py
Code Quality
black src/ scripts/ # formatting
flake8 src/ scripts/ # linting
pytest # tests
Conventions
All source code — comments, docstrings, identifiers, log/error messages and test prose — is written in English. German is allowed only where it is data, not code: user-facing locale strings (e.g. src/archilles/i18n.py) and the docs under docs/ that are intentionally German (DECISIONS.md, ROADMAP.md).
Architecture
The system follows a layered pipeline:
Library (Calibre, read-only SQLite; Zotero, Obsidian, folders via adapters)
↓
Text source: the book file, or its Scriptor bundle (<library>/.archilles/scriptor/<key>/)
↓
Extractors (PDF/EPUB/Scriptor/TXT/HTML; MOBI/DJVU via Calibre conversion; OCR) — they also chunk
↓
Indexer (src/archilles/engine): Calibre metadata, BGE-M3 embedding, write
↓
LanceDB (one `chunks` table; hybrid: dense vectors + BM25 FTS)
↓
Retriever (RRF fusion + optional cross-encoder reranking)
↓
ArchillesService (central facade)
↓
Consumers: MCP Server | Web UI (Streamlit) | CLI
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.
- 24d ago Changed e2493ab6076e
- 1mo ago Changed · +30 lines · +789 tokens per session 705a7d5194bb
- 2mo ago First seen · 119 lines · 1,256 tokens per session scan A 8804deaa9933
archilles AGENTS.md is an instructions file published in the GitHub repository kasssandr/archilles (9 stars, last pushed 8d ago), licensed MIT. It adds 2,045 tokens to every session, about $0.0082 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.
archilles AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| archilles AGENTS.mdkasssandr/archilles | Instructions file | 9 | 8d ago | MIT | A | 2,045 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | yesterday | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | yesterday | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |