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/tim-mccrimmon/structured-context-spec/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.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 | $0.01997 | $0.01997 |
| Opus 5 | $0.00999 | $0.00999 |
| Sonnet 5 | $0.00399 | $0.00399 |
| Haiku 4.5 | $0.00200 | $0.00200 |
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 5d 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 — 192 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: 0.3
License: Apache 2.0
Website: https://structuredcontext.dev
Registry/product: SCP (separate repo: SCP-2)
Repository Structure
structured-context-spec/
├── spec/0.3/ # The specification documents (source of truth)
│ ├── overview.md # Top-level spec overview
│ ├── core-model.md # SCDs, bundles, tiers
│ ├── bundle-format.md # Bundle manifest format
│ ├── meta-tier.md # Meta tier specification
│ ├── standards-tier.md # Standards tier specification
│ ├── 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
├── 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.
- 5d 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 2mo ago), licensed Apache-2.0. It adds 1,997 tokens to every session, about $0.0100 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
ContextLattice AGENTS.md
Instructions for sheawinkler/ContextLattice, covering agent instructions, start, work loop, hooks and host lifecycle safety.
ai-context-kit AGENTS.md
AGENTS.md instructions for MSiccDev/ai-context-kit, covering ai context kit agent guide, purpose, source of truth and precedence, repository map and scope and precedence for agents.md files.
memory-journal-mcp copilot-instructions.md
Copilot instructions for neverinfamous/memory-journal-mcp, covering memory journal mcp — copilot code review context, project overview, session context, tooling standards and coding standards.
aictx AGENTS.md
Instructions for oldskultxo/aictx, covering agents instructions for aictx and ai context engine.
aictx aictx.instructions.md
Instructions for oldskultxo/aictx: Apply these instructions to repository work. Prefer AICTX MCP tools when available; fall back to AICTX CLI commands otherwise. They intentionally duplicate the minimal AICTX lifecycle because Copilot support varies by surface.
mex CLAUDE.md
Claude Code instructions for mex-memory/mex, a project described as: Persistent project memory for AI coding agents. Structured scaffold + drift detection CLI.