Borrowing it
Nothing to install: this file belongs to lgbarn/shipyard. 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/lgbarn/shipyard/main/AGENTS.mdgit clone --depth 1 https://github.com/lgbarn/shipyardWrote 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/lgbarn/shipyard/agents-md)<a href="https://agentmods.dev/instructions/lgbarn/shipyard/agents-md"><img src="https://agentmods.dev/badge/instructions/lgbarn/shipyard/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/lgbarn/shipyard/agents-md"><img src="https://agentmods.dev/badge/instructions/lgbarn/shipyard/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 | $0.01089 | $0.01089 |
| Opus 5.5 | $0.00436 | $0.00436 |
| Sonnet 5.5 | $0.00218 | $0.00218 |
| Haiku 4.5 | $0.00109 | $0.00109 |
Grade A, and why
shipyard 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 1mo 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 — 82 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Shipyard
Agent-driven plugin (v4.8.0) for structured project execution: idea → brainstorm → plan → build → ship.
Shipyard is authored as a Claude Code plugin (canonical source) and also ships a generated Codex plugin tree so Codex users can install it natively. The Claude Code artifacts are the single source of truth; the Codex tree is a build output (see "Codex support" below).
Commands
npm test # Full BATS test suite
npm run test:fast # Unit tests only (bats --filter-tags unit)
npm run test:ci # Parallel execution (4 jobs)
bash scripts/check-versions.sh # Verify version sync across files
bash scripts/build-codex.sh # Regenerate the Codex plugin tree from canonical artifacts
bash scripts/check-codex-sync.sh # Verify the committed Codex tree matches the generator
shellcheck --severity=warning scripts/*.sh hooks/*.sh test/run.sh
Architecture
commands/ Slash commands (markdown + YAML frontmatter) — Claude Code
skills/ Auto-activating skills (skills/<name>/SKILL.md) — shared with Codex
agents/ Specialized subagents (markdown + YAML frontmatter) — Claude Code
scripts/ State management, version checks, Codex generator, cleanup utilities
hooks/ Plugin lifecycle hooks (SessionStart, TeammateIdle, TaskCompleted, Stop) — Claude Code
test/ BATS test suite + test_helper.bash
docs/ Protocols, guides, state schema, context engineering
.claude-plugin/ Claude Code plugin metadata (plugin.json, marketplace.json) — canonical
plugins/ Generated Codex plugin tree (plugins/shipyard/.codex-plugin/, skills/)
.agents/ Generated Codex marketplace manifest (.agents/plugins/marketplace.json)
.husky/ Pre-commit: check-versions.sh && check-codex-sync.sh && npm test
Codex support
Codex artifacts are generated from the canonical Claude Code artifacts — never hand-edited.
scripts/build-codex.shtransforms.claude-plugin/plugin.json+skills/into the Codex tree underplugins/shipyard/and.agents/plugins/marketplace.json.scripts/check-codex-sync.shregenerates into a temp dir and diffs against the committed tree; any drift fails CI. This is what keeps the Codex tree from drifting by hand.- Codex install:
codex plugin marketplace add lgbarn/shipyard, then enable the plugin. - Codex support is best-effort, not parity: skills run natively, but parallel subagent dispatch and lifecycle hooks degrade (see the PRD and the "Using Shipyard with Codex" 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.
- 1mo ago First seen · 82 lines · 1,089 tokens per session scan A 5b8eaa74fe19
shipyard AGENTS.md is an instructions file published in the GitHub repository lgbarn/shipyard (65 stars, last pushed 7d ago), licensed MIT. It adds 1,089 tokens to every session, about $0.0044 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.
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).
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.