diff --git a/CHANGELOG.md b/CHANGELOG.md
index 92044262..da9645eb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,46 @@ Format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
 ## [Unreleased]
 
+## [1.28.0] - 2026-03-22
+
+### Added
+- **Workstream namespacing** — Parallel milestone work via `/gsd:workstreams`
+- **Multi-project workspace commands** — Manage multiple GSD projects from a single root
+- **`/gsd:forensics` command** — Post-mortem workflow investigation
+- **`/gsd:milestone-summary` command** — Post-build onboarding for completed milestones
+- **`workflow.skip_discuss` setting** — Bypass discuss-phase in autonomous mode
+- **`workflow.discuss_mode` assumptions config** — Control discuss-phase behavior
+- **UI-phase recommendation** — Automatically surfaced for UI-heavy phases
+- **CLAUDE.md compliance** — Added as plan-checker Dimension 10
+- **Data-flow tracing, environment audit, and behavioral spot-checks** in verification
+- **Multi-runtime selection** in interactive installer
+- **Text mode support** for plan-phase workflow
+- **"Follow the Indirection" debugging technique** in gsd-debugger
+- **`--reviews` flag** for `gsd:plan-phase`
+- **Temp file reaper** — Prevents unbounded /tmp accumulation
+
+### Changed
+- Test matrix optimized from 9 containers down to 4
+- Copilot skill/agent counts computed dynamically from source dirs
+- Wave-specific execution support in execute-phase
+
+### Fixed
+- Windows 8.3 short path failures in worktree tests
+- Worktree isolation enforced for code-writing agents
+- Linked worktrees respect `.planning/` before resolving to main repo
+- Path traversal prevention via workstream name sanitization
+- Strategy branch created before first commit (not at execute-phase)
+- `ProviderModelNotFoundError` on non-Claude runtimes
+- `$HOME` used instead of `~` in installed shell command paths
+- Subdirectory CWD preserved in monorepo worktrees
+- Stale hook detection checking wrong directory path
+- STATE.md frontmatter status preserved when body Status field missing
+- Pipe truncation fix using `fs.writeSync` for stdout
+- Verification gate before writing PROJECT.md in new-milestone
+- Removed `jq` as undocumented hard dependency
+- Discuss-phase no longer ignores workflow instructions
+- Gemini CLI uses `BeforeTool` hook event instead of `PreToolUse`
+
 ## [1.27.0] - 2026-03-20
 
 ### Added
@@ -1625,7 +1665,8 @@ Format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 - YOLO mode for autonomous execution
 - Interactive mode with checkpoints
 
-[Unreleased]: https://github.com/glittercowboy/get-shit-done/compare/v1.27.0...HEAD
+[Unreleased]: https://github.com/glittercowboy/get-shit-done/compare/v1.28.0...HEAD
+[1.28.0]: https://github.com/glittercowboy/get-shit-done/releases/tag/v1.28.0
 [1.27.0]: https://github.com/glittercowboy/get-shit-done/releases/tag/v1.27.0
 [1.26.0]: https://github.com/glittercowboy/get-shit-done/releases/tag/v1.26.0
 [1.25.0]: https://github.com/glittercowboy/get-shit-done/releases/tag/v1.25.0