Borrowing it
Nothing to install: this file belongs to TimboGP/timbogp-marketplace. 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/TimboGP/timbogp-marketplace/main/AGENTS.mdgit clone --depth 1 https://github.com/TimboGP/timbogp-marketplaceWrote 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/timbogp/timbogp-marketplace/agents-md)<a href="https://agentmods.dev/instructions/timbogp/timbogp-marketplace/agents-md"><img src="https://agentmods.dev/badge/instructions/timbogp/timbogp-marketplace/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/timbogp/timbogp-marketplace/agents-md"><img src="https://agentmods.dev/badge/instructions/timbogp/timbogp-marketplace/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 | $0.02993 | $0.02993 |
| Opus 5 | $0.01496 | $0.01496 |
| Sonnet 5 | $0.00599 | $0.00599 |
| Haiku 4.5 | $0.00299 | $0.00299 |
Grade A, and why
timbogp-marketplace 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 12d 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 — 132 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md — timbogp marketplace
This repository is the timbogp marketplace: a curated catalog of Claude Code plugins (also published for Codex). It currently hosts three plugins, which are independent of each other — the marketplace is just the shared distribution channel and the place their dev tooling lives.
| Plugin | Directory | What it is |
|---|---|---|
agentic-study-environment |
plugin/agentic-study-environment/ |
A coding-agent learning harness — structured tutor sessions over user-supplied source materials, with swappable domain overlays. |
ux-design |
plugin/ux-design/ |
A UX/UI toolkit — scored usability + accessibility audits, UX metrics, and stack-adaptive scaffolding (skills, commands, an agent, and zero-dependency CLI tools). |
lean-coach |
plugin/lean-coach/ |
A Lean business-development coach — guide a venture through Ash Maurya's Running Lean (Lean Canvas, riskiest-assumption testing, customer interviews, experiments, product/market fit) and role-play the customer, investor, devil's-advocate, business-partner, and mentor you test it with. |
Each plugin is independently versioned and self-documenting; work on one rarely touches the other. When working inside a plugin, read that plugin's README.md (and its docs/) first — they carry the operational detail this file intentionally does not duplicate.
The two catalogs
The marketplace is published in two manifest formats that must stay in sync — when you add, rename, or re-version a plugin, update both:
.claude-plugin/marketplace.json— the Claude Code catalog (lists all three plugins)..agents/plugins/marketplace.json— the Codex catalog (lists all three plugins).
Each plugin additionally carries its own manifests: <plugin>/.claude-plugin/plugin.json (Claude) and <plugin>/.codex-plugin/plugin.json (Codex, with an interface block). A plugin's version and description must match across its own two manifests and the catalog entries.
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.
- 12d ago First seen · 132 lines · 2,993 tokens per session scan A 9f2b7010ad44
timbogp-marketplace AGENTS.md is an instructions file published in the GitHub repository TimboGP/timbogp-marketplace (3 stars, last pushed 2mo ago), licensed MIT. It adds 2,993 tokens to every session, about $0.0150 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 2026-08-31.
Other instructions, from other repositories
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.
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.
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).
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 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).