Borrowing it
Nothing to install: this file belongs to SchmiedmayerLab/heartwood. 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/SchmiedmayerLab/heartwood/main/AGENTS.mdgit clone --depth 1 https://github.com/SchmiedmayerLab/heartwoodWrote 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/schmiedmayerlab/heartwood/agents-md)<a href="https://agentmods.dev/instructions/schmiedmayerlab/heartwood/agents-md"><img src="https://agentmods.dev/badge/instructions/schmiedmayerlab/heartwood/agents-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 5.1 | $0.02122 | $0.02122 |
| Opus 5 | $0.01061 | $0.01061 |
| Sonnet 5 | $0.00424 | $0.00424 |
| Haiku 4.5 | $0.00212 | $0.00212 |
Grade A, and why
heartwood 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 8d 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 — 106 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS Instructions
Guidance for contributors working in this repository.
Purpose
This file is the repository orientation and rule set. It should point to the canonical docs instead of restating them.
When project direction changes, update the relevant architecture or operations page first, then update this file only if routing or durable working rules change.
Canonical Documentation
| Need | Source |
|---|---|
| Repository summary | README.md |
| Published documentation home and user journey | documentation/index.md |
| First-use installation, project, model, and interface flow | documentation/start/index.md |
| Workstation, Terra, Carina, and managed-environment selection | documentation/platforms/index.md |
| Installation routes | documentation/start/install.md |
Project boundary, persistence, and .heartwood/ layout |
documentation/start/project.md |
| Research-environment, hosted, compatible-service, and Heartwood-managed model workflows | documentation/models/index.md |
| Deployment responsibilities and platform extension contract | documentation/operate/index.md |
| Release support, compatibility, and deprecation policy | documentation/operate/support.md |
| Browser workflow | documentation/use/browser.md |
| Research specialist roles and boundaries | documentation/use/specialists.md |
| Command reference | documentation/reference/cli.md |
| Readiness states, stable diagnostics, and recovery steps | documentation/reference/troubleshooting.md |
| Qualified GPU runtime, model, and platform combinations | documentation/reference/gpu-compatibility.md |
| Product boundaries and durable technical rationale | documentation/architecture/index.md |
| Project, gateway, adapter, interface, and data-flow architecture | documentation/architecture/system.md |
| Security and controlled-data responsibilities | documentation/operate/security.md |
| Authoritative audit exports, signing, and retention | documentation/operate/audit-checkpoints.md |
| Audit integrity and session persistence | documentation/architecture/sessions-audit.md |
| Skill trust, distribution, activation, and interface contract | documentation/architecture/skills.md |
| Research Skill contribution, policy, and validation | documentation/contribute/skills.md |
| Testing layers and evidence language | documentation/architecture/testing.md |
| Python and web development workflow | documentation/contribute/development.md |
| Pull request description structure | Organization pull request template |
| Planned implementation, acceptance criteria, and delivery status | GitHub Issues and the Heartwood Project |
| Acronyms and specialized terms | documentation/reference/glossary.md |
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.
- 8d ago First seen · 106 lines · 2,122 tokens per session scan A 27c5bbdde738
heartwood AGENTS.md is an instructions file published in the GitHub repository SchmiedmayerLab/heartwood (11 stars, last pushed 6d ago), licensed MIT. It adds 2,122 tokens to every session, about $0.0106 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
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
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, applying the notice (cutover) and fallback chain (never fail the build).
spec-kit AGENTS.md
AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.
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.