Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add instructions/drdroidlab/open-index/claude-mdgit clone --depth 1 https://github.com/DrDroidLab/open-indexWrote 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/drdroidlab/open-index/claude-md)<a href="https://agentmods.dev/instructions/drdroidlab/open-index/claude-md"><img src="https://agentmods.dev/badge/instructions/drdroidlab/open-index/claude-md.svg" alt="Measured on agentmods" 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 | $0.00131 | $0.00131 |
| Opus 5 | $0.00066 | $0.00066 |
| Sonnet 5 | $0.00026 | $0.00026 |
| Haiku 4.5 | $0.00013 | $0.00013 |
Grade A, and why
open-index 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 4d 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.
What it actually says
Open Index repository guidance
This is the open-source Open Index repository. Everything committed here or submitted to its GitHub issues, discussions, and comments may become public.
Public-safety rules
- Never commit or publish PII, customer data, private incident details, internal hostnames/URLs, proprietary context, credentials, API keys, tokens, or secrets.
- Use synthetic names and data in source, tests, examples, screenshots, and docs.
- Read credentials only from environment variables; never print or persist them.
- Do not add generated local state (
*.db,.open_index_state.json) to git.
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.
- 4d ago First seen · 13 lines · 131 tokens per session scan A 6a3189e935f4
open-index CLAUDE.md is an instructions file published in the GitHub repository DrDroidLab/open-index (105 stars, last pushed 23d ago), licensed MIT. It adds 131 tokens to every session, about $0.0007 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.
Other instructions, from other repositories
create-context-graph CLAUDE.md
Instructions for neo4j-labs/create-context-graph, covering claude.md — create context graph, project overview, quick reference, setup and run tests.
awesome-harness-engineering AGENTS.md
AGENTS.md instructions for ai-boost/awesome-harness-engineering, covering agents.md, what this repo is, conventions, what belongs and what doesn't belong.
Meterless AGENTS.md
Instructions for Meterless/Meterless, covering agent instructions for meterless, routing table, isolation rule, repo-wide rules and non-coding agents.
Core-Memory CLAUDE.md
Instructions for JohnnyFiv3r/Core-Memory, covering claude.md — core memory, what this repo is, guiding principle — engineering simplicity, boring primitives, rich views and mapping to the current codebase.
awesome-harness-engineering CLAUDE.md
Claude Code instructions for ai-boost/awesome-harness-engineering, a project described as: Awesome list for AI agent harness engineering: tools, patterns, evals, memory, MCP, permissions, observability, and orchestration.
vellis AGENTS.md
Instructions for volantlabs/vellis, covering agents.md, repository purpose, startup checks, installing vellis for a user and model-first component workflow.