Borrowing it
Nothing to install: this file belongs to niawjunior/opencontext. 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/niawjunior/opencontext/main/CLAUDE.mdgit clone --depth 1 https://github.com/niawjunior/opencontextWrote 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/niawjunior/opencontext/claude-md)<a href="https://agentmods.dev/instructions/niawjunior/opencontext/claude-md"><img src="https://agentmods.dev/badge/instructions/niawjunior/opencontext/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/niawjunior/opencontext/claude-md"><img src="https://agentmods.dev/badge/instructions/niawjunior/opencontext/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 | $0.00278 | $0.00278 |
| Opus 5.5 | $0.00111 | $0.00111 |
| Sonnet 5.5 | $0.00056 | $0.00056 |
| Haiku 4.5 | $0.00028 | $0.00028 |
Grade A, and why
opencontext 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 2mo 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
@AGENTS.md
Project Context (Open Context) — IMPORTANT
This project uses Open Context for AI context management.
REQUIRED: Update context after code changes
After you finish writing or modifying code, you MUST update the relevant module context:
- Call
resolve_projectto get the project ID - Call
list_modulesto find which module(s) you changed - Call
update_module_contextwith the updated context markdown for each affected module
This keeps the project documentation in sync. The context goes through a review flow — the developer will see a diff and approve/reject your update in the Open Context app.
How to access context
Use the MCP tools available to you:
resolve_project— auto-detect this project from your cwdget_project_context— get the full context documentlist_modules— see all modules and their coverage statusget_module_context— get detailed context for a specific modulesearch_context— search across all context
What triggers context updates
- AI (you): Use
update_module_contextMCP tool after code changes (goes through approval) - Git hook: Auto-marks affected modules as stale on push
- Manual: Developer clicks "Sync" on any module in Open Context
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.
- 2mo ago First seen · 30 lines · 278 tokens per session scan A ce4f1bd6d710
opencontext CLAUDE.md is an instructions file published in the GitHub repository niawjunior/opencontext (0 stars, last pushed 7mo ago), licensed MIT. It adds 278 tokens to every session, about $0.0011 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.