Bug: CLI crashes on startup due to semver parsing of changelog dates

Description

Claude Code CLI crashes on startup with Invalid Version error when the changelog cache contains version headers with dates in parentheses.

Error

ERROR  Invalid Version: 2.1.0 (2026-01-07)

file:///.../@anthropic-ai/claude-code/cli.js:869:8900

- iT (file:///.../cli.js:869:8900)
- SJ8 (file:///.../cli.js:869:14028)
- Object.dJ8 (file:///.../cli.js:869:14584)
-  (file:///.../cli.js:3091:4240)
    at Array.sort (<anonymous>)
- de2 (file:///.../cli.js:3091:4224)

Root Cause

The file ~/.claude/cache/changelog.md contains version headers in the format:

## 2.1.0 (2026-01-07)

The CLI's semver parser expects strict semver format (2.1.0) but receives 2.1.0 (2026-01-07) which includes the release date. This causes the parser to fail during version comparison/sorting.

Workaround

Strip date suffixes from version headers:

sed -i '' 's/## \([0-9]*\.[0-9]*\.[0-9]*\) ([^)]*)/## \1/g' ~/.claude/cache/changelog.md

Suggested Fix

When parsing changelog versions, strip or ignore the date portion in parentheses before passing to semver parser:

// Before parsing
const versionMatch = line.match(/^## (\d+\.\d+\.\d+)/);
const version = versionMatch ? versionMatch[1] : null;

Environment

• Node.js: v22.16.0
• OS: macOS (Darwin)
• Claude Code: 2.1.0