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Addresses 3 open code-scanning alerts: - CodeQL go/incomplete-url-scheme-check (high): crawler's denylist only covered mailto:/javascript: — data:, vbscript:, tel:, file:, blob: could slip through. Replaced with an http(s)-only allow-list on the parsed URL scheme (case-insensitive). Added table-driven tests. - SonarCloud go:S2612 (x2): hookinstaller wrote config with 0o644 and hook scripts with 0o755 — both world-readable. Tightened to 0o600 / 0o700 since these files live in the user's own ~/.claude dir and only the owner needs access. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
- FuzzResolveURL — found and fixed a second edge case in resolveURL: non-http(s) base URLs could escape the scheme allow-list via ResolveReference. Added belt-and-braces scheme check on the resolved URL. 1.76M executions clean at 30s/target. - FuzzChunker — exercises text splitter on UTF-8 edges, zero bytes, CRLF, large inputs, and random (size, overlap) pairs. - .github/workflows/fuzz.yml — runs each target for 30s on every PR + main push. Scorecard's Fuzzing check detects Go native fuzz targets. Not a replacement for continuous fuzzing; see OSS-Fuzz tier-2 for that. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Summary
Adds native Go fuzzing at the `FuzzXxx` level — Tier 1 of the OSS-Fuzz roadmap. Scorecard's Fuzzing check detects these targets.
Depends on #19 for the initial `resolveURL` scheme allow-list. Once #19 merges this PR collapses to just the fuzz additions + belt-and-braces delta.
Follow-up (tier 2)
Register with google/oss-fuzz for continuous fuzzing — separate PR, ~1 week review turnaround.
Test plan