Release d hard freeze proxies

.github/workflows/ci.yml

@@ -35,7 +35,7 @@ jobs:
         working-directory: packages/tempo
 
   test-parse-prefilter:
-    name: Test with parsePrefilter enabled
+    name: Test with parse.preFilter enabled
     runs-on: ubuntu-latest
     timeout-minutes: 30
     if: github.ref == 'refs/heads/release-c-layout-order-planner' || github.event.pull_request.base.ref == 'main'
@@ -49,7 +49,7 @@ jobs:
       - name: Install monorepo dependencies
         run: npm ci
         working-directory: ${{ github.workspace }}
-      - name: Run all tests with parsePrefilter
+      - name: Run all tests with parse.preFilter
         run: npm test
         working-directory: packages/tempo
         env:

CHANGELOG.md

@@ -7,6 +7,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [2.8.0] - 2026-04-30
+
+### Changed
+- **Release D: Immutability System Refined**: Continued improvements to the immutability system. The project evaluated mutation-throwing Proxies for all immutable objects, but reverted to using `Object.freeze` for stability and compatibility. See plan for architectural details.
+
+### Migration
+- All objects remain frozen with `Object.freeze`. No mutation-throwing Proxies are used for core objects. Identity checks (`===`) behave as before.
+
 ## [2.7.0] - 2026-04-27
 
 ### Added