Borrowing it
Nothing to install: this file belongs to grcengineering/companion. 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/grcengineering/companion/main/AGENTS.mdgit clone --depth 1 https://github.com/grcengineering/companionWrote 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/grcengineering/companion/agents-md)<a href="https://agentmods.dev/instructions/grcengineering/companion/agents-md"><img src="https://agentmods.dev/badge/instructions/grcengineering/companion/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/grcengineering/companion/agents-md"><img src="https://agentmods.dev/badge/instructions/grcengineering/companion/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 | $0.00322 | $0.00322 |
| Opus 5.5 | $0.00129 | $0.00129 |
| Sonnet 5.5 | $0.00064 | $0.00064 |
| Haiku 4.5 | $0.00032 | $0.00032 |
Grade A, and why
companion 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 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
Agent Instructions
This repo is The GRC Companion.
Canonical Source Order
Treat these as source of truth:
brain/- identity, voice, learning method, primitives.skills/- learning skill contracts.commands/- portable learning-only command contracts.profile/- learner-owned profile schema and examples.knowledge/- citation-grounded corpus.demos/- behavioural examples and transcripts.scripts/- generated context and adapter outputs.docs/- GitHub Pages static landing page.dist/adapters/- generated adapter bundles.
If a generated surface conflicts with canonical source, update canonical source and rerun the build scripts.
Build Loop
Run this after structural changes:
scripts/build-knowledge-index
scripts/sync-skill-manifests
scripts/build-card-pages
scripts/build-adapters
scripts/verify-structure
scripts/run-evals
Boundary
The companion is learning-only.
Do not add skills or commands that:
- assess real vendors
- prep live audits
- author production policies
- run controls
- score a user's programme maturity
- process sensitive evidence as if this were an operational GRC system
If a feature seems useful but operational, move it out of this repo or convert it into a fictional practice scenario.
Adapter Rule
Adapters must be generated from canonical files. Do not hand-edit adapter bundles unless you are fixing the generator and regenerating.
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 · 52 lines · 322 tokens per session scan A 756f4ecd0b6b
companion AGENTS.md is an instructions file published in the GitHub repository grcengineering/companion (35 stars, last pushed 6mo ago), licensed MIT. It adds 322 tokens to every session, about $0.0013 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.
companion AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| companion AGENTS.mdgrcengineering/companion | Instructions file | 35 | 6mo ago | MIT | A | 322 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 9,719 | GitHub Copilot |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 5,516 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | today | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | today | MIT | A | 4,680 | Codex, OpenCode |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 3,093 | GitHub Copilot |
| vscode model-prompts.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 2,022 | GitHub Copilot |