semi implemented and features implemented save checkpoint

docs/features/unchecked/taskrunner/taskpack-manifest-and-planning.md

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+# TaskPack Manifest and Planning
+
+## Module
+TaskRunner
+
+## Status
+IMPLEMENTED
+
+## Description
+Full task pack manifest system with loading, validation, planning, and plan hashing for deterministic execution verification.
+
+## Implementation Details
+- **Manifest model**: `src/TaskRunner/StellaOps.TaskRunner/StellaOps.TaskRunner.Core/TaskPacks/TaskPackManifest.cs` -- task pack manifest schema
+- **Manifest loader**: `src/TaskRunner/StellaOps.TaskRunner/StellaOps.TaskRunner.Core/TaskPacks/TaskPackManifestLoader.cs` -- loads manifests from filesystem/storage
+- **Manifest validator**: `src/TaskRunner/StellaOps.TaskRunner/StellaOps.TaskRunner.Core/TaskPacks/TaskPackManifestValidator.cs` -- validates manifest structure and constraints
+- **Planner**: `src/TaskRunner/StellaOps.TaskRunner/StellaOps.TaskRunner.Core/Planning/TaskPackPlanner.cs` -- creates execution plans from manifests
+- **Plan model**: `src/TaskRunner/StellaOps.TaskRunner/StellaOps.TaskRunner.Core/Planning/TaskPackPlan.cs` -- execution plan data model
+- **Plan hasher**: `src/TaskRunner/StellaOps.TaskRunner/StellaOps.TaskRunner.Core/Planning/TaskPackPlanHasher.cs` -- deterministic plan hashing for verification
+- **Plan insights**: `src/TaskRunner/StellaOps.TaskRunner/StellaOps.TaskRunner.Core/Planning/TaskPackPlanInsights.cs` -- planning insights and analysis
+- **Expressions**: `src/TaskRunner/StellaOps.TaskRunner/StellaOps.TaskRunner.Core/Expressions/TaskPackExpressions.cs` -- expression evaluation for manifest conditions
+- **Canonical JSON**: `src/TaskRunner/StellaOps.TaskRunner/StellaOps.TaskRunner.Core/Serialization/CanonicalJson.cs` -- deterministic JSON serialization for plan hashing
+- **Tests**: `src/TaskRunner/StellaOps.TaskRunner/StellaOps.TaskRunner.Tests/TaskPackPlannerTests.cs`, `TestManifests.cs`, `TestManifests.Egress.cs`
+- **Source**: Feature matrix scan
+
+## E2E Test Plan
+- [ ] Verify manifest loading from filesystem
+- [ ] Test manifest validation catches invalid structures
+- [ ] Verify planner creates correct execution plans from manifests
+- [ ] Test deterministic plan hashing produces consistent hashes
+- [ ] Verify expression evaluation in manifest conditions