docs: document completion of release-management-optimization Stages 1-2

Updated workplan with comprehensive completion summary documenting
successful release of v0.10.0 following Standard Track (Stages 1-2).

**Completion Summary**:
- Stage 1: Critical Fixes ✅ (~45 min)
  - Fixed setuptools-scm configuration
  - Created v0.9.0 retroactive tag
  - Prepared CHANGELOG for v0.10.0

- Stage 2: CHANGELOG Schema ✅ (~90 min)
  - Created changelog-schema-v1.0.md (360 lines)
  - Implemented x-markitect extensions
  - Successfully validates project CHANGELOG.md
  - All semantic checks passing

**Release**: v0.10.0 (2026-01-06)
**Philosophy**: "The release that validates itself"
- Uses its own schema system to validate CHANGELOG.md
- Perfect showcase of schema evolution practical value

**Deferred Work**:
- Stage 3: Release capability enhancements (future)
- Stage 4: Schema system extensions (not needed)

Updated status from "Planning" to "Stages 1-2 Complete, v0.10.0 Released"

roadmap/260106-release-management-optimization/WORKPLAN.md

@@ -2,8 +2,8 @@
 
 **Topic**: 260106-release-management-optimization
 **Created**: 2026-01-06
-**Status**: Planning
-**Priority**: High (blocks v0.10.0 release)
+**Status**: Stages 1-2 Complete, v0.10.0 Released
+**Priority**: High (blocks v0.10.0 release) ✅ UNBLOCKED
 
 ---
 
@@ -585,12 +585,139 @@ def cli():
 
 ---
 
-## Next Steps
+## Completion Summary
 
-1. **Review this workplan** with user
-2. **Choose release strategy** (Fast/Standard/Full track)
-3. **Begin Stage 1** (critical fixes)
-4. **Proceed based on chosen track**
+**Completed**: 2026-01-06
+**Release**: v0.10.0
+**Track**: Standard (Stages 1-2)
+
+### Stage 1: Critical Fixes ✅
+
+**Duration**: ~45 minutes
+**Status**: COMPLETE
+
+#### Achievements:
+1. ✅ **Fixed setuptools-scm Configuration**
+   - Added `git_describe_command = "git describe --tags --long --match 'v*'"`
+   - Filters out non-version tags (e.g., "testdrive-jsui-migration-phase4-complete")
+   - Version detection now works: `markitect --version` → 0.10.0
+   - File: `pyproject.toml`
+   - Commit: 061ba88
+
+2. ✅ **Retroactively Created v0.9.0 Git Tag**
+   - Tagged commit b9c1b90 from 2025-11-14
+   - Maintains version history integrity
+   - CHANGELOG documented v0.9.0 but tag was missing
+   - Enables proper version progression to v0.10.0
+   - Commit: 061ba88
+
+3. ✅ **Prepared CHANGELOG.md for v0.10.0**
+   - Created [0.10.0] - 2026-01-06 section
+   - Moved Unreleased content to v0.10.0
+   - Documented version detection fixes
+   - Documented v0.9.0 retroactive tag
+   - Commit: 061ba88
+
+### Stage 2: CHANGELOG Schema ✅
+
+**Duration**: ~90 minutes
+**Status**: COMPLETE
+
+#### Achievements:
+1. ✅ **Created changelog-schema-v1.0.md**
+   - Comprehensive schema for Keep a Changelog format
+   - 360+ lines of schema definition and documentation
+   - File: `markitect/schemas/changelog-schema-v1.0.md`
+   - Commit: c4ee5cc
+
+2. ✅ **Implemented x-markitect Extensions**
+   - `x-markitect-sections`: 7 section classifications
+     - [Unreleased]: required
+     - Added/Changed/Deprecated/Removed/Fixed/Security: optional
+   - `x-markitect-content-control`: 6 content patterns
+     - Title validation, introduction patterns, version format
+     - Date format (ISO 8601), change types, reference links
+   - `x-markitect-validation-rules`: 4 custom rules
+     - Version format, date format, version ordering, unreleased position
+
+3. ✅ **Schema Ingestion and Testing**
+   - Ingested into schema catalog (Record ID: 12)
+   - Successfully validates project CHANGELOG.md
+   - All section requirements met (7 checked, 11 found)
+   - All content requirements met
+   - All semantic checks passing
+   - Command: `markitect validate CHANGELOG.md --schema changelog-schema-v1.0.md --semantic`
+
+4. ✅ **Documentation in CHANGELOG**
+   - Documented new schema in v0.10.0 Added section
+   - Philosophy: "The release that validates itself"
+   - Showcase of schema system practical application
+
+### Version Release ✅
+
+**Tag**: v0.10.0
+**Date**: 2026-01-06
+**Verification**: `markitect --version` → 0.10.0
+
+### Success Metrics
+
+**Stage 1 Criteria** (Required for Release):
+- ✅ `markitect --version` returns actual version (0.10.0, not "unknown")
+- ✅ v0.9.0 git tag exists
+- ✅ CHANGELOG.md has v0.10.0 section
+- ✅ v0.10.0 tagged and ready
+
+**Stage 2 Criteria** (Showcase Feature):
+- ✅ changelog-schema-v1.0.md created and ingested
+- ✅ CHANGELOG.md validates against schema
+- ✅ Schema demonstrates Keep a Changelog format validation
+- ✅ All semantic validation checks passing
+
+### Deferred Work
+
+**Stage 3** (Release Capability Enhancements):
+- ⭐ CHANGELOG validation in ReleaseManager
+- ⭐ Version-tag consistency checking
+- ⭐ Explicit `markitect version` command
+- **Status**: Deferred to future enhancement
+- **Reason**: v0.10.0 release unblocked, showcase feature complete
+
+**Stage 4** (Schema System Extensions):
+- 🎯 System call hooks (x-markitect-validation-hooks)
+- 🎯 Agent validation (x-markitect-validation-agents)
+- **Status**: Not needed for CHANGELOG validation
+- **Reason**: Pure schema validation sufficient
+
+### Files Created/Modified
+
+**Created**:
+- `markitect/schemas/changelog-schema-v1.0.md` (360 lines)
+
+**Modified**:
+- `pyproject.toml` (setuptools-scm configuration)
+- `CHANGELOG.md` (v0.10.0 section, changelog schema documentation)
+- `roadmap/260106-release-management-optimization/WORKPLAN.md` (this file)
+
+**Tags Created**:
+- `v0.9.0` (retroactive, commit b9c1b90)
+- `v0.10.0` (release, commit c4ee5cc+)
+
+### Commits
+
+1. `4e9117d` - plan: create release-management-optimization roadmap topic
+2. `061ba88` - fix: resolve version detection and prepare v0.10.0 release
+3. `c4ee5cc` - feat: add changelog schema for Keep a Changelog validation
+4. `v0.10.0` - Release tag created
+
+### Philosophy Achievement
+
+> "Use the tools we build to improve the tools we build."
+
+**Result**: v0.10.0 is "The release that validates itself"
+- ✅ Uses its own schema system to validate its CHANGELOG.md
+- ✅ Demonstrates schema evolution practical value
+- ✅ Real-world showcase of x-markitect extensions
+- ✅ Perfect example of dogfooding infrastructure
 
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