FastMCP is a Python framework for building Model Context Protocol applications, which connect language models with tools and data through servers and clients. Developers use it to expose Python functions as tools, connect to local or remote MCP servers, and build interactive tool interfaces. The catalogue includes eight skills, three instructions, two rules, one setting, and one hook for FastMCP.
Borrowing it
Nothing to install: this file belongs to PrefectHQ/fastmcp. 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/PrefectHQ/fastmcp/main/.agents/skills/review-issue/SKILL.mdgit clone --depth 1 https://github.com/PrefectHQ/fastmcpWrote 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/prefecthq/fastmcp/review-issue)<a href="https://agentmods.dev/skills/prefecthq/fastmcp/review-issue"><img src="https://agentmods.dev/badge/skills/prefecthq/fastmcp/review-issue/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/prefecthq/fastmcp/review-issue"><img src="https://agentmods.dev/badge/skills/prefecthq/fastmcp/review-issue.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Snyk warn
- 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 | $0.00044 | $0.01598 |
| Opus 5.5 | $0.00018 | $0.00639 |
| Sonnet 5.5 | $0.00009 | $0.00320 |
| Haiku 4.5 | $0.00004 | $0.00160 |
Grade A, and why
review-issue 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 4d 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 — 78 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Review an incoming issue
This skill ends in a recommendation for the maintainer:
- Assign: the issue is valid, an external PR suits it, and a sound PR exists. Assign the author, which clears the gate, then review the code.
- Decline: close the open contribution, or leave a closed one closed, and explain why on the issue once authorized.
- Maintainer decision needed: only when investigation leaves a concrete choice that materially changes supported behavior or ongoing support scope. State the affected scenario, competing outcomes, why protocol/docs/history/prior decisions do not settle it, and a recommendation. Ordinary reviewer uncertainty or implementation preferences do not qualify. The unresolved choice alone is not a reason to decline or formally request changes.
Assignment commits us to reviewing the PR, not to merging it. A gate closure is administrative, so a closed PR gets the same bar as an open one.
How the gate works
require-issue-link.yml checks every external PR:
- It needs
Fixes/Closes/Resolves #N. PRs without a valid link are closed. - A linked PR stays open with a failing check until its author is assigned to that issue. Issues labeled
prs welcomewaive assignment but still need the link. - Assigning the author (
gh issue edit N --add-assignee <login>) re-runs the check and reopens a gate-closed PR. If that run fails, the gate misbehaved: investigate the run rather than re-assigning. - Maintainer PRs are exempt, and so are authors with the
trusted-contributorlabel. Reopening a PR by hand or removingmissing-issue-linkapplies a stickybypass-issue-check, so prefer assignment. marvin-dedupe-issues,auto-close-duplicates, andauto-close-needs-mrehave usually commented already. Read them as leads.
Procedure
-
Orient. Read the issue, its bot comments, and every PR that references it, in all states:
gh issue view N --repo PrefectHQ/fastmcp \ --json number,title,state,author,body,labels,assignees,comments gh pr list --repo PrefectHQ/fastmcp --state all --search "#N in:body" \ --json number,title,state,author,url,labels gh pr view <pr> --repo PrefectHQ/fastmcp --json title,body,labels,files,additions,deletions gh pr view <pr> --repo PrefectHQ/fastmcp --comments
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.
- 4d ago Changed 8f2b27ece37e
- 18d ago Changed · +2 lines 6ef9797f9ed1
- 1mo ago Changed · +1 lines 88ea46f6ba50
- 1mo ago Changed 7884f67ea183
- 1mo ago Changed bfa47508ad21
- 1mo ago Changed · -124 lines c184b1cf30d6
- 1mo ago Changed · +2 lines 572b454e8dc1
- 1mo ago Changed · +28 lines 16bfadb3e190
- 2mo ago First seen · 169 lines · 44 tokens per session scan A 040ac0709e10
review-issue is a skill published in the GitHub repository PrefectHQ/fastmcp (28,322 stars, last pushed today), licensed Apache-2.0. It adds 44 tokens to every session and 1,598 once invoked, about $0.0002 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.
review-issue compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| review-issuePrefectHQ/fastmcp | Skill | 28k | today | Apache-2.0 | A | 44 | Claude Code, Codex |
| first-readerShubhamsaboo/awesome-llm-apps | Skill | 144k | yesterday | Apache-2.0 | A | 174 | Claude Code, Codex |
| hugging-face-model-trainerpatchy631/ai-engineering-hub | Skill | 41k | 5d ago | MIT | A | 131 | Claude Code |
| hugging-face-datasetspatchy631/ai-engineering-hub | Skill | 41k | 5d ago | MIT | A | 49 | Claude Code |
| hugging-face-paper-publisherpatchy631/ai-engineering-hub | Skill | 41k | 5d ago | MIT | A | 42 | Claude Code |
| thinking-out-loudShubhamsaboo/awesome-llm-apps | Skill | 144k | yesterday | Apache-2.0 | A | 206 | Claude Code, Codex |
| create-tech-designhumanlayer/humanlayer | Skill | 13k | yesterday | Apache-2.0 | A | 16 | Claude Code, Codex |