Borrowing it
Nothing to install: this file belongs to tim-mccrimmon/structured-context-spec. 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/tim-mccrimmon/structured-context-spec/main/CLAUDE.mdgit clone --depth 1 https://github.com/tim-mccrimmon/structured-context-specWrote 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/tim-mccrimmon/structured-context-spec/claude-md)<a href="https://agentmods.dev/instructions/tim-mccrimmon/structured-context-spec/claude-md"><img src="https://agentmods.dev/badge/instructions/tim-mccrimmon/structured-context-spec/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/tim-mccrimmon/structured-context-spec/claude-md"><img src="https://agentmods.dev/badge/instructions/tim-mccrimmon/structured-context-spec/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 | $0.02486 | $0.02486 |
| Opus 5.5 | $0.00994 | $0.00994 |
| Sonnet 5.5 | $0.00497 | $0.00497 |
| Haiku 4.5 | $0.00249 | $0.00249 |
Grade A, and why
structured-context-spec 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 today.
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 — 211 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
Structured Context Specification (SCS) — Project Context
What This Project Is
The open-source SCS specification — a community-governed standard for structuring, versioning, and delivering context to AI agents.
This is the spec repo, not the product. SCS defines the format (SCDs, bundles, tiers, relationships). SCP (Supervisory Control Plane) is the commercial runtime product built on top of SCS — it lives in a separate private repo.
Current spec version: 0.6.0 (draft, branch 0.6-dev)
License: Apache 2.0
Website: https://structuredcontext.dev
Registry/product: SCP (separate repo: SCP-2)
Repository Structure
structured-context-spec/
├── spec/0.6/ # The specification documents (source of truth)
│ ├── overview.md # Top-level spec overview
│ ├── core-model.md # SCDs, bundles, tiers
│ ├── bundle-format.md # Bundle manifest format
│ ├── citations.md # std: standard citations
│ ├── runtime-artifact.md # Compiled runtime artifact format
│ ├── meta-tier.md # Meta tier specification
│ ├── standards-tier.md # Deprecated in 0.6.0 (replaced by citations)
│ ├── project-tier.md # Project tier specification
│ ├── terminology.md # Canonical definitions
│ └── governance-and-compliance.md
├── rfcs/ # Requests for Comments (spec changes)
│ ├── README.md # RFC process guide
│ └── 0000-template.md # Template for new RFCs
├── meta/ # The published meta bundle (bundle:meta:0.6.0), read-only
├── schema/ # JSON Schema validation files
├── templates/ # Starter templates
│ ├── bundles/ # Bundle manifest templates
│ └── scd/ # SCD templates by tier
├── examples/ # Reference implementations
├── plugins/ # Editor/tool integrations
│ ├── scs-vibe/ # Cursor/Windsurf plugin
│ └── scs-team/ # Claude Code multi-agent plugin
├── tools/ # CLI and validator tools
│ ├── cli/ # scs CLI
│ └── scd-validator/ # YAML structure validator
├── dog-food/ # SCS documenting itself with SCS
│ └── SCS-MED-CONTEXT/ # Bundles + SCDs for SCS's own context
├── context/ # Additional spec context documents
├── docs/ # Non-spec documentation
└── CONTRIBUTING.md # Contribution guide
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.
- today Changed · +12 lines · +318 tokens per session dc0aa9587b2f
- 22d ago Changed · +7 lines · +171 tokens per session 7ed8aa58ecdd
- 1mo ago First seen · 192 lines · 1,997 tokens per session scan A 4e61a2aae4c3
structured-context-spec CLAUDE.md is an instructions file published in the GitHub repository tim-mccrimmon/structured-context-spec (19 stars, last pushed today), licensed Apache-2.0. It adds 2,486 tokens to every session, about $0.0099 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 2026-08-30.
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).
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.