Borrowing it
Nothing to install: this file belongs to JosiahSiegel/claude-plugin-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/JosiahSiegel/claude-plugin-marketplace/main/CLAUDE.mdgit clone --depth 1 https://github.com/JosiahSiegel/claude-plugin-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/josiahsiegel/claude-plugin-marketplace/claude-md)<a href="https://agentmods.dev/instructions/josiahsiegel/claude-plugin-marketplace/claude-md"><img src="https://agentmods.dev/badge/instructions/josiahsiegel/claude-plugin-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/josiahsiegel/claude-plugin-marketplace/claude-md"><img src="https://agentmods.dev/badge/instructions/josiahsiegel/claude-plugin-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 | $0.00602 | $0.00602 |
| Opus 5 | $0.00301 | $0.00301 |
| Sonnet 5 | $0.00120 | $0.00120 |
| Haiku 4.5 | $0.00060 | $0.00060 |
Grade A, and why
claude-plugin-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 11d 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 — 72 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Claude Code Marketplace - AI Agent Instructions
Critical: Version Management
NEVER manually edit plugin versions. Always use the version management script:
# Bump a single plugin after making changes
python3 scripts/version_ops.py -b patch -p <plugin-name>
# Bump ALL plugins
python3 scripts/version_ops.py -b patch --all
# Validate versions are in sync
python3 scripts/version_ops.py --validate
# Sync versions if they get out of sync
python3 scripts/version_ops.py --sync
The script maintains consistency between:
.claude-plugin/marketplace.json(central registry)plugins/<name>/.claude-plugin/plugin.json(individual configs)
For keyword metadata, plugins/<name>/.claude-plugin/plugin.json is the source of truth. Marketplace keywords are mirrors for discovery and should be validated or synchronized with:
python3 scripts/version_ops.py --validate --metadata keywords
python3 scripts/version_ops.py --sync --metadata keywords
Version bump types:
patch- Bug fixes, docs, minor tweaksminor- New features, skills, agentsmajor- Breaking changes
See scripts/CLAUDE.md for complete documentation.
Intentional deviation from official Claude Code guidance
Official Claude Code docs recommend setting version in plugin.json OR in the marketplace entry — not both. This repo intentionally sets it in both locations and enforces byte-identical sync via scripts/version_ops.py. The duplication is acceptable because: (1) sync is mechanical, never manual; (2) an explicit version in each marketplace entry makes plugin discovery and changelog inspection easier without cloning every plugin source. The rule is absolute: never hand-edit versions — always use version_ops.py.
Agent Model Configuration
All agents should use model: inherit to adopt the parent session's model:
---
name: my-agent
model: inherit # Inherits from parent session (opus/sonnet/haiku)
---
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.
- 11d ago First seen · 72 lines · 602 tokens per session scan A 8a42b3102a60
claude-plugin-marketplace CLAUDE.md is an instructions file published in the GitHub repository JosiahSiegel/claude-plugin-marketplace (54 stars, last pushed 2mo ago), licensed MIT. It adds 602 tokens to every session, about $0.0030 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 2026-08-30.
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