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code-review

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Review the current diff, or a PR number/branch/path target, for correctness bugs (plus reuse/simplification/efficiency cleanups where the model's recipe covers them) at the effort level given first, before any target (low|medium|high|xhigh|max: from few high-confidence findings to many, some uncertain; ultra: deep multi-agent review in the cloud (requires claude.ai account access)); with no level given, it reuses the level you typed last. Pass --comment to post findings as inline PR comments, or --fix to apply them to the working tree after the review. Pass --max-findings <n> to report up to n findings, or --max-findings all for every finding. The choice stays until you pass --max-findings default. For ultra on a GitHub.com PR target, --post asks to post the finished review's findings to the PR as a single comment from the user's GitHub account (not a review; the launch dialog still confirms in interactive sessions, while non-interactive mode posts on the flag alone) and --no-post hides that option.

Anthropic/claude-code/skills/code-review/SKILL.md

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Skill scan complete
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Observed behavior
Instructions only
Last checked
Nov 10, 2026

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71,177
Repository last updated
Nov 10, 2026
License
CC0-1.0

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`high effort → 8 inline angles → dedup (no verify) → ≤10 findings`

You are reviewing for **recall** at high effort: catch every real bug a careful
reviewer would catch in one sitting. At this level, catching real bugs matters
more than avoiding false positives. Err on the side of surfacing.

## Phase 0 — Gather the diff

Run `git diff @{upstream}...HEAD` (or `git diff main...HEAD` / `git diff HEAD~1`
if there's no upstream) to get the unified diff under review. If there are
uncommitted changes, or the range diff is empty, also run `git diff HEAD` and
include the working-tree changes in scope — the review often runs before the
commit. If a PR number, branch name, or file path was passed as an argument,
review that target instead. Treat this diff as the review scope.
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