chore: bump version and changelog (v0.4.4)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -1,5 +1,16 @@
 # Changelog
 
+## 0.4.4 — 2026-03-16
+
+- **New releases detected in under an hour, not half a day.** The update check cache was set to 12 hours, which meant you could be stuck on an old version all day while new releases dropped. Now "you're up to date" expires after 60 minutes, so you'll see upgrades within the hour. "Upgrade available" still nags for 12 hours (that's the point).
+- **`/gstack-upgrade` always checks for real.** Running `/gstack-upgrade` directly now bypasses the cache and does a fresh check against GitHub. No more "you're already on the latest" when you're not.
+
+### For contributors
+
+- Split `last-update-check` cache TTL: 60 min for `UP_TO_DATE`, 720 min for `UPGRADE_AVAILABLE`.
+- Added `--force` flag to `bin/gstack-update-check` (deletes cache file before checking).
+- 3 new tests: `--force` busts UP_TO_DATE cache, `--force` busts UPGRADE_AVAILABLE cache, 60-min TTL boundary test with `utimesSync`.
+
 ## 0.4.3 — 2026-03-16
 
 - **New `/document-release` skill.** Run it after `/ship` but before merging — it reads every doc file in your project, cross-references the diff, and updates README, ARCHITECTURE, CONTRIBUTING, CHANGELOG, and TODOS to match what you actually shipped. Risky changes get surfaced as questions; everything else is automatic.

VERSION

@@ -1 +1 @@
-0.4.3
+0.4.4