diff --git a/.trellis/workspace/dingkang/journal-1.md b/.trellis/workspace/dingkang/journal-1.md
index 66ecf62..e2f6d5b 100644
--- a/.trellis/workspace/dingkang/journal-1.md
+++ b/.trellis/workspace/dingkang/journal-1.md
@@ -61,3 +61,22 @@ remain an identity transform for compiled geometry.
 ### Next Steps
 
 - Implement the six constraint kinds and invariant diagnostics (step 3).
+
+## Session 3: Direct-edit constraint solving
+
+**Date**: 2026-08-27
+**Task**: Continue `direct-edit-solver-api`, step 3
+**Git Commit**: `0eb404d`
+
+### Summary
+
+Activated all six constraint kinds, added transactional validation and blocking
+diagnostics, and wired road profiles and junction plans into geometry compilation.
+
+### Testing
+
+- [OK] npm test; npm run format:check; npm run test:client; npm run test:client:unit; npm run build
+
+### Next Steps
+
+- Implement exact/recheck/pending/conflicted/stale replay matching (step 4).