Borrowing it
Nothing to install: this file belongs to systemfsoftware/constitution. 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/systemfsoftware/constitution/main/AGENTS.mdgit clone --depth 1 https://github.com/systemfsoftware/constitutionWrote 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/systemfsoftware/constitution/agents-md)<a href="https://agentmods.dev/instructions/systemfsoftware/constitution/agents-md"><img src="https://agentmods.dev/badge/instructions/systemfsoftware/constitution/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/systemfsoftware/constitution/agents-md"><img src="https://agentmods.dev/badge/instructions/systemfsoftware/constitution/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 | $0.01845 | $0.01845 |
| Opus 5.5 | $0.00738 | $0.00738 |
| Sonnet 5.5 | $0.00369 | $0.00369 |
| Haiku 4.5 | $0.00185 | $0.00185 |
Grade A, and why
constitution 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 20d 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 — 127 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md — Constitution Repository
Single source of truth for the supreme design law of System F Software. Consumer repos vendor via git subtree + symlink. This repo has no production code, no test suite, and no build step — it is two documents plus governance tooling (corpus validation, commit validation): CONSTITUTION.md, the maker's law, resident in every agent's context, every law, always; and ENFORCEMENT.md, the instrument owner's doctrine, never loaded into the maker's context.
@CONSTITUTION.md
Startup Workflow
Before making changes:
- Read this file completely.
- Confirm the active task with the user or the agent's task list.
- Review recent commits with
git log --oneline -5. - Ensure current branch is not
main— feature branches only. If on main, create one.
Working Rules
- One task at a time. Finish before starting the next.
- Conventional commits required. The commit-msg hook enforces
type(scope): description. Rungit committhrough the hook — do not bypass with--no-verify. - Verification required. Run the verification commands before claiming done.
- Stay in scope. Don't modify files unrelated to the task. Scope reduction requires explicit user approval.
- Leave clean state. The next session must run verification immediately.
Amending the Constitution
Corpus
CONSTITUTION.md(Resident): the entire maker corpus — a one-line preamble and the laws in four sections (Model the domain, Shape the code, Prove it, Finish) — loaded in every session. There is no retrieved half and no on-demand trigger: law that is not in the window is not law. Residency delivers obligation, not enforcement; the machinery of judgment lives outside the maker's reach.ENFORCEMENT.md(Non-resident): the instrument owner's doctrine — gate design, instrument-change discipline, enrollment law. Read by whoever builds or changes a gate, never@-imported into a maker's context. Consumer repos route to it from the leaves that own enforcement surfaces (lint plugins, guard scripts, CI workflows, rules directories, advisor rosters): one line — "You are editing an enforcement instrument. Read the vendoredENFORCEMENT.mdbefore this lands." A routing line added anywhere else is the defect: the maker must not meet instrument doctrine while doing graded work.docs/solutions/: past problems and their fixes, organized by category with YAML frontmatter (module,tags,problem_type);CONCEPTS.mdat repo root holds shared domain vocabulary.
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.
- 20d ago Changed · +4 lines · +335 tokens per session 6aee1f8e7562
- 1mo ago Changed · +1 lines · +47 tokens per session edbabda33662
- 1mo ago Changed · +1 lines · +191 tokens per session 648104562bfa
- 1mo ago Changed · -1 lines · -35 tokens per session 8e240b9002e5
- 2mo ago First seen · 122 lines · 1,307 tokens per session scan A 44a302f3105b
constitution AGENTS.md is an instructions file published in the GitHub repository systemfsoftware/constitution (3 stars, last pushed 10d ago), licensed Apache-2.0. It adds 1,845 tokens to every session, about $0.0074 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.