Borrowing it
Nothing to install: this file belongs to marcusrbrown/systematic. 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/marcusrbrown/systematic/main/AGENTS.mdgit clone --depth 1 https://github.com/marcusrbrown/systematicWrote 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/marcusrbrown/systematic/agents-md)<a href="https://agentmods.dev/instructions/marcusrbrown/systematic/agents-md"><img src="https://agentmods.dev/badge/instructions/marcusrbrown/systematic/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/marcusrbrown/systematic/agents-md"><img src="https://agentmods.dev/badge/instructions/marcusrbrown/systematic/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 | $0.02490 | $0.02490 |
| Opus 5.5 | $0.00996 | $0.00996 |
| Sonnet 5.5 | $0.00498 | $0.00498 |
| Haiku 4.5 | $0.00249 | $0.00249 |
Grade A, and why
systematic 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 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 — 100 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md - Coding Agent Guidelines for Systematic
Generated: 2026-05-01 | Commit: 2e9453a | Branch: main
Overview
Systematic is a plugin providing compound-engineering loops (brainstorm, plan, work, review) for OpenCode, Pi, and Claude Code. It ships as an npm package with two distinct parts: TypeScript source (src/) for plugin logic and bundled Markdown assets (skills/, agents/) for content. Full architectural detail lives in ARCHITECTURE.md; directory layout and where to add new code lives in STRUCTURE.md. This file covers contributor conventions, commands, and anti-patterns.
For Architecture Questions
| Question | Go to |
|---|---|
| How does the plugin work? | ARCHITECTURE.md |
| Which plugin hooks are registered? | ARCHITECTURE.md |
| What invariants must hold? | ARCHITECTURE.md |
| What is the config priority order? | ARCHITECTURE.md |
| Where do I put new code? | STRUCTURE.md |
| What does each directory contain? | STRUCTURE.md |
| What are the naming conventions? | STRUCTURE.md |
| What harnesses and compatibility evidence are verified? | HARNESSES.md |
| How do I run, hold, or recover a release? | RELEASING.md |
| What conventions apply to my code? | This file (Conventions section below) |
| What patterns should I follow? | This file (Conventions + Anti-Patterns below) |
Before implementing features or diagnosing failures, search docs/solutions/ for related past solutions by frontmatter metadata and reuse verified patterns where they still apply.
Commands
bun install # Install deps
bun run build # Build to dist/
bun run typecheck # Type check (strict)
bun run typecheck:scripts # Type check scripts + docs scripts too (required in CI)
bun run typecheck:all # Type check tests + scripts too (required CI gate: tests + scripts + docs scripts)
bun run lint # Biome linter
bun test tests/unit # Unit tests
bun test tests/integration # Integration tests
bun test # All tests
bun test --filter "pattern" # Filter tests
bun run docs:dev # Local docs site
bun run docs:build # Build docs (generates reference + builds Starlight)
bun run docs:generate # Sync reference content from bundled assets
bun run docs:verify # Run docs build the same way CI does (use before approving docs-framework dep bumps)
bun run registry:build # Build OCX registry
bun run registry:drift # Check registry source drift vs generated assets
bun run registry:validate # Validate registry without building
bun run registry:generate # Regenerate registry/registry.jsonc
bun run pi-personas:generate # Regenerate the Pi persona fixtures
bun run pi-personas:drift # Check the Pi persona fixtures (write-free)
bun run config-reference:generate # Regenerate the field reference in configuration.mdx
bun run config-reference:drift # Check that field reference (write-free)
bun run surfaces:affected # List the generated surfaces your changes touch (--run: regenerate them, then check)
bun run surfaces:regen # Regenerate every committed generated surface
bun run surfaces:drift # Check every surface and name each failure (CI runs this)
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 · +1 lines · +136 tokens per session 1a2547435f51
- 8d ago Changed · +1 lines · +53 tokens per session 62e6180fc2a1
- 9d ago Changed · -2 lines · +167 tokens per session b4ee46a92eaa
- 11d ago Changed · +9 lines · +442 tokens per session 8d5d1fe1b970
- 14d ago Changed · +53 tokens per session 6b802702147d
- 24d ago Changed · +1 lines · +28 tokens per session 73980c0de1a4
- 1mo ago Changed · +15 tokens per session 7168584e9ff3
- 2mo ago Changed · -1 tokens per session f7eac7bb51d5
- 2mo ago Changed · +4 lines · +75 tokens per session 408496537f31
- 2mo ago First seen · 86 lines · 1,522 tokens per session scan A 5940767d991c
systematic AGENTS.md is an instructions file published in the GitHub repository marcusrbrown/systematic (28 stars, last pushed today), licensed MIT. It adds 2,490 tokens to every session, about $0.0100 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.
systematic AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| systematic AGENTS.mdmarcusrbrown/systematic | Instructions file | 28 | today | MIT | A | 2,490 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | 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 | yesterday | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |