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 agentmods add skills/prefecthq/fastmcp/review-issuenpx skills add PrefectHQ/fastmcp --skill review-issuegit clone --depth 1 https://github.com/PrefectHQ/fastmcpWhat 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 | $0.00044 | $0.02400 |
| Opus 5 | $0.00022 | $0.01200 |
| Sonnet 5 | $0.00009 | $0.00480 |
| Haiku 4.5 | $0.00004 | $0.00240 |
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 yesterday.
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 — 169 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Triaging contributions under the issue-link gate
FastMCP auto-closes external PRs unless the author is assigned to a referenced issue (see require-issue-link.yml). The practical effect: contributors open an issue, open a PR, get auto-closed, and ask to be assigned. The maintainer almost never sees the PR directly — the issue is the decision point, and assigning the author is the single action that reopens their PR and sends it into review.
This skill turns "look at this issue" into one of two outcomes:
- Assign — the issue is valid, we want it fixed, an external PR is appropriate, and a sound PR already exists → assign the author (auto-reopens the PR) and queue it for code review.
- Decline — leave the issue/PR closed and explain why on the issue.
Be opinionated about declining. The gate moved spam from junk PRs to junk issues; this skill is worthless if it just rubber-stamps assignment. Assignment is a commitment to review and likely merge, not a courtesy.
How the gate works (the part that matters here)
- External PR is closed unless its body has
Fixes/Closes/Resolves #Nand the author is assigned to issue#N. - Assigning the author to the issue auto-reopens their closed PR and re-runs the check —
this is the lever you pull.
gh issue edit N --add-assignee <login>. The assignment fires arequire-issue-linkrun; expect it to pass. If it fails, the gate itself misbehaved (not the PR) — investigate the run, don't re-assign. - Maintainer-authored PRs are exempt. A
trusted-contributorlabel exempts a contributor up front. Reopening the PR or removing themissing-issue-linklabel applies a stickybypass-issue-check. - Sibling bots have usually already run on the issue:
marvin-triage-issue(investigates + recommends),marvin-dedupe-issues/auto-close-duplicates(dupes),auto-close-needs-mre(missing MRE). Read their comments before re-deriving anything.
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.
- yesterday First seen · 169 lines · 44 tokens per session scan A 040ac0709e10
review-issue is a skill published in the GitHub repository PrefectHQ/fastmcp (27,470 stars, last pushed today), licensed Apache-2.0. It adds 44 tokens to every session and 2,400 once invoked, about $0.0002 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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