Release/3.9.0

[bao-byterover]

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Claude finished @bao-byterover's task in 2m 10s —— View job

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PR Review: Release/3.9.0

• Gather context and read changed files
• Analyze changes for correctness, security, and code quality
• Post inline comments (skipped — PR already merged)
• Provide overall summary with score

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Summary

A clean, minimal release PR that bumps the version to 3.9.0 and updates supporting documentation. Three files changed:

File	Change
package.json	Version 3.8.x → 3.9.0
CLAUDE.md	Added diff to the brv vc subcommand list
CHANGELOG.md	New [3.9.0] section (+3 Added, +2 Changed, +2 Fixed)

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Findings

nitpick — Commit message typo

The first commit message reads "Bump veversion to 3.9.0" (double ve). Should be "Bump version to 3.9.0". Minor cosmetic issue, no functional impact.

suggestion (non-blocking) — Missing release dates in CHANGELOG

All version headers omit the date. The Keep a Changelog spec recommends:

## [3.9.0] - 2026-04-27

This makes it easy to correlate a version to a point in time without digging through git tags. This pattern is absent across all entries (not just 3.9.0), so it's worth establishing the convention going forward.

nitpick — "Fixed" entry is arguably a "Changed"

CHANGELOG.md line 17:

Google default model updated to gemini-3-flash-preview (was gemini-3.1-flash-lite-preview).

Updating a default model is a behavioral change, not a bug fix — it belongs under ### Changed. Placing it under ### Fixed overstates the severity and could confuse users expecting a broken feature to now work.

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Security

No concerns. This PR contains only a version bump and documentation updates — no code changes.

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Overall Score: 4 / 5

Well-executed release PR. The CHANGELOG entries are clear, detailed, and user-friendly. The CLAUDE.md update is accurate (correctly documents the new brv vc diff command). The two minor improvements are the date omission in CHANGELOG (a project-wide convention to adopt) and the miscategorised "Fixed" entry.