feat(update): auto-install and update skills during hotdata update

[eddietejeda]

Summary

• After hotdata update swaps the binary, it now downloads and installs the matching skills tarball for the new version
• Uses the target version URL (not CURRENT_VERSION) since the old binary is still running at call time
• Skills are installed even if never previously set up — a fresh upgrade leaves the user with both a new binary and up-to-date agent skills
• Failures print a yellow warning without rolling back the binary update
• Skips silently when skills are managed by a skills agent

Implementation

Refactored download_and_extract() into a download_and_extract_from_url(url) helper so existing and new versioned paths share one implementation. Added pub fn install_for_version(version) to skill.rs, called from run_update() in update.rs after perform_update() succeeds.

Test plan

• Run hotdata update when a newer version exists — binary updates, then skill download and success message appear
• Run hotdata update when skills were never installed — skills are installed as part of the upgrade
• Simulate skills tarball 404 — binary update succeeds, warning printed, no crash
• Run when managed by a skills agent — skills step skipped silently
• Run hotdata update when already up to date — no skill download triggered

Generated with Claude Code

[sentry]

Codecov Report

❌ Patch coverage is 0% with 20 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/skill.rs	0.00%	19 Missing ⚠️
src/update.rs	0.00%	1 Missing ⚠️

📢 Thoughts on this report? Let us know!