Claude Code Skills Marketplace is a collection and marketplace of skills, plugins, agents, and instructions that extend Claude Code with specialized development workflows. It is for developers who want to install existing workflows or create, validate, and package their own Claude Code skills.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add daymade/claude-code-skills --skill marketplace-health-checkgit clone --depth 1 https://github.com/daymade/claude-code-skillsWrote 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/skills/daymade/claude-code-skills/marketplace-health-check)<a href="https://agentmods.dev/skills/daymade/claude-code-skills/marketplace-health-check"><img src="https://agentmods.dev/badge/skills/daymade/claude-code-skills/marketplace-health-check/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/skills/daymade/claude-code-skills/marketplace-health-check"><img src="https://agentmods.dev/badge/skills/daymade/claude-code-skills/marketplace-health-check.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00113 | $0.01894 |
| Opus 5.5 | $0.00045 | $0.00758 |
| Sonnet 5.5 | $0.00023 | $0.00379 |
| Haiku 4.5 | $0.00011 | $0.00189 |
Grade A, and why
marketplace-health-check 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 24d 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 — 98 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Marketplace Health Check
Run a comprehensive, evidence-based health check of this Claude Code skills marketplace repo using a parallel fan-out Dynamic Workflow. Six independent inspectors cover, in parallel:
- Code & script safety — dangerous deletes, NO-FALLBACK secret leaks, hardcoded real paths, bare
except, injection, missing shebangs - Documentation / SSOT consistency — version coherence across marketplace.json / README×2 / CHANGELOG / git release, skill & plugin counts, broken references, derived-value drift
- Security / PII — keyword-free leaks gitleaks can't catch (real names, private domains), the
.security-scan-passedmarker gap, case-file audits - Open-PR triage — classify every PR (worth-merging / needs-changes / decline-as-promotion)
- Open-issue triage — real bugs vs skill-requests vs promotion, plus the broken-install-command bug class
- Marketplace-manifest integrity —
check_marketplace.sh+check_doc_skill_lists.py, orphans, suite registration
Then YOU verify the serious findings and report by priority. The bundled script (scripts/repo-health-check.workflow.js) is the proven, ready-to-run workflow; this file is how to run and interpret it.
Why a workflow — and why it MUST run inline
The six dimensions are independent, so fanning them out across six parallel agents is far faster than one agent sweeping serially, and each inspector stays focused on one concern with its own structured output.
This skill must run inline (no context: fork). It orchestrates parallel agents through the Workflow tool, and a forked subagent cannot spawn subagents or launch a workflow — running it forked would silently break the fan-out. The Workflow tool also requires explicit user opt-in; a user asking to "run the health check" IS that opt-in, so proceed.
How to run
Step 1 — Scout the current scale (one quick pass, shared by all six agents)
The workflow script takes an args object so all agents share one accurate snapshot instead of each re-discovering it. Gather:
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 24d ago Changed · -3 lines · -68 tokens per session 919dd876006c
- 1mo ago First seen · 101 lines · 181 tokens per session scan A bd792bae3be5
marketplace-health-check is a skill published in the GitHub repository daymade/claude-code-skills (1,473 stars, last pushed today), licensed MIT. It adds 113 tokens to every session and 1,894 once invoked, about $0.0005 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 2026-09-03.
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