Borrowing it
Nothing to install: this file belongs to gf-labs/gfl-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/gf-labs/gfl-marketplace/main/CLAUDE.mdgit clone --depth 1 https://github.com/gf-labs/gfl-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/gf-labs/gfl-marketplace/claude-md)<a href="https://agentmods.dev/instructions/gf-labs/gfl-marketplace/claude-md"><img src="https://agentmods.dev/badge/instructions/gf-labs/gfl-marketplace/claude-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/gf-labs/gfl-marketplace/claude-md"><img src="https://agentmods.dev/badge/instructions/gf-labs/gfl-marketplace/claude-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 | $0.00900 | $0.00900 |
| Opus 5 | $0.00450 | $0.00450 |
| Sonnet 5 | $0.00180 | $0.00180 |
| Haiku 4.5 | $0.00090 | $0.00090 |
Grade A, and why
gfl-marketplace CLAUDE.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 — 85 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
What this is
gfl-marketplace is a standalone Claude Code plugin marketplace for Greenfield Labs.
It is a pure manifest — no plugin code lives here. It catalogs two plugins:
ramp— adaptive learning mode, knowledge graphs, spaced repetitiontools— session lifecycle management (orient, checkpoint, archive, health checks)
Plugin sources are GitHub HTTPS URL references. On /plugin install, the plugin system
clones those repos into its local cache.
How local development works
Two ways to register this marketplace (the github source is canonical — it's what end
users get; see "Settings.json registration" below):
githubsource — Claude Code fetchesmarketplace.jsonfrom GitHub. Push manifest changes before they take effect. This is how the catalog is meant to be consumed.directorysource (optional, local dev) — point Claude Code at this repo on disk and it readsmarketplace.jsonfrom disk every session, so manifest edits are live with no push.
Plugin code changes use --plugin-dir. For active development of ramp or tools, bypass
the marketplace entirely and load the plugin live from its local repo:
claude --plugin-dir path/to/ramp # develop ramp live
claude --plugin-dir path/to/claude-toolbox # develop tools live
No install, no cache rebuild, no push. Changes are live immediately.
When using the installed (cached) version, Claude Code caches by plugin version. To pick up code changes from GitHub:
- Bump version in the plugin's
.claude-plugin/plugin.json - Push to GitHub
- Reinstall:
/plugin install ramp@gfl-marketplace
/reload-plugins reloads active plugins but only picks up minor in-session changes — it won't
pull new code from GitHub. For most plugin changes, prefer --plugin-dir during development.
Settings.json registration
"extraKnownMarketplaces": {
"gfl-marketplace": {
"source": {
"source": "github",
"repo": "gf-labs/gfl-marketplace"
}
}
}
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 · 85 lines · 900 tokens per session scan A 81582e11af01
gfl-marketplace CLAUDE.md is an instructions file published in the GitHub repository gf-labs/gfl-marketplace (2 stars, last pushed 1mo ago), licensed MIT. It adds 900 tokens to every session, about $0.0045 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).