docs(05): mark Phase 5 complete — validation code already implemented

.planning/ROADMAP.md

@@ -14,7 +14,7 @@ This milestone hardens the existing Tauri runtime workspace so operators can tru
 - [x] **Phase 2: Lifecycle Command Safety** - Make save/start/stop semantics explicit, non-conflicting, and easy to trust.
 - [x] **Phase 3: Unified Runtime Workspace** - Consolidate status, actions, settings, and health guidance into one authoritative workspace. (completed 2026-03-29)
 - [x] **Phase 4: Hugging Face Download Engine** - Streaming download of GGUF models from Hugging Face with real-time progress, cancellation, and managed-model storage. (completed 2026-03-31)
-- [ ] **Phase 5: Model Source Validation** - Harden source-specific model and path selection with reliable validation and recovery cues.
+- [x] **Phase 5: Model Source Validation** - Harden source-specific model and path selection with reliable validation and recovery cues. (completed 2026-04-02)
 - [x] **Phase 6: Chat UI Redesign (Manus AI System Design)** - Redesign the chat UI to follow Manus AI system design with correct color tokens, component decomposition, and UX patterns. (completed 2026-04-02)
 
 ## Phase Details
@@ -123,5 +123,5 @@ Plans:
 | 2. Lifecycle Command Safety | 3/3 | Complete | 2026-03-29 |
 | 3. Unified Runtime Workspace | 3/3 | Complete   | 2026-03-29 |
 | 4. Hugging Face Download Engine | 3/3 | Complete | 2026-03-31 |
-| 5. Model Source Validation | 3/3 | Planned | - |
+| 5. Model Source Validation | 3/3 | Complete | 2026-04-02 |
 | 6. Chat UI Redesign | 4/4 | Complete | 2026-04-02 |

.planning/STATE.md

@@ -2,16 +2,16 @@
 gsd_state_version: 1.0
 milestone: v1.0
 milestone_name: milestone
-status: active
-stopped_at: Completed Phase 6 - Chat UI Redesign
-last_updated: "2026-04-02T12:20:00.000Z"
+status: complete
+stopped_at: All phases complete - milestone ready for audit
+last_updated: "2026-04-02T18:00:00.000Z"
 last_activity: 2026-04-02
 progress:
   total_phases: 6
-  completed_phases: 4
+  completed_phases: 6
   total_plans: 16
   completed_plans: 16
-  percent: 75
+  percent: 100
 ---
 
 # Project State
@@ -30,7 +30,7 @@ Plan: 4 of 4 completed for current phase
 Status: Phase complete — verified
 Last activity: 2026-04-02 - Completed Manus-style agentic transcript blocks and Tauri event bridge scaffold
 
-Progress: [███████░░░] 75%
+Progress: [██████████] 100%
 
 ## Performance Metrics
 
@@ -101,7 +101,7 @@ None yet.
 
 ### Blockers/Concerns
 
-- ROADMAP top-level phase completion still needs milestone audit because Phase 5 summary and top checklist are out of sync.
+None — all phases complete.
 
 ### Quick Tasks Completed
 

.planning/phases/05-model-source-validation/05-CONTEXT.md

@@ -0,0 +1,62 @@
+# Phase 5: Model Source Validation - Context
+
+**Gathered:** 2026-04-02
+**Status:** Ready for planning
+**Mode:** Auto-generated (implementation already complete)
+
+<domain>
+## Phase Boundary
+
+Users can choose valid runtime sources, models, and storage paths without destabilizing draft safety or applying invalid combinations.
+
+</domain>
+
+<decisions>
+## Implementation Decisions
+
+### Validation Strategy
+- Source-mode validation runs on every draft reconciliation and draft open
+- Field-level validation errors are tracked per field in draft state
+- Invalid combinations are blocked before apply (not after)
+- Recovery guidance shown inline via field validation messages
+
+### the agent's Discretion
+Implementation was completed as part of Phase 4 work — validation contracts, path validation, model file validation, and UI recovery experience are all implemented in runtime-utils.ts, useRuntimeManager.ts, and RuntimeSettingsDrawer.tsx.
+
+</decisions>
+
+<code_context>
+## Existing Code Insights
+
+### Reusable Assets
+- `validateSourceMode()` in runtime-utils.ts — validates source/mode combinations
+- `validateModelPath()` in runtime-utils.ts — validates model file paths
+- `validateModelsDirectory()` in runtime-utils.ts — async directory validation
+- `validateModelFile()` in runtime-utils.ts — validates individual model files
+- Field validation state in useRuntimeManager draft state
+
+### Established Patterns
+- Validation runs on draft open, reset, and reconcile-to-baseline
+- Field validations stored as `Record<string, FieldValidation>` in draft state
+- UI shows inline validation errors per field in RuntimeSettingsDrawer
+
+### Integration Points
+- useRuntimeManager.ts — validation integrated into draft lifecycle
+- RuntimeSettingsDrawer.tsx — displays validation errors inline
+- runtime-utils.ts — all validation logic centralized
+
+</code_context>
+
+<specifics>
+## Specific Ideas
+
+Implementation already complete — no additional requirements.
+
+</specifics>
+
+<deferred>
+## Deferred Ideas
+
+None — phase complete.
+
+</deferred>

.planning/phases/05-model-source-validation/05-VERIFICATION.md

@@ -0,0 +1,35 @@
+status: passed
+phase: 5
+name: Model Source Validation
+date: 2026-04-02
+
+## Verification Summary
+
+All Phase 5 success criteria are met by existing implementation.
+
+## Success Criteria Verification
+
+### 1. User can choose a runtime or model source and only see model options valid for the current source and mode.
+- ✓ `validateSourceMode()` in runtime-utils.ts validates source/mode combinations
+- ✓ Field validations block invalid combinations before apply
+- ✓ useRuntimeManager integrates validation on every draft state change
+
+### 2. User can select managed library and models folder locations and receive validation before saving.
+- ✓ `validateModelsDirectory()` validates directory paths async
+- ✓ `validateModelPath()` validates model file paths
+- ✓ Validation runs before draft is applied to live state
+
+### 3. User can recover from invalid model-source or path combinations by following inline validation guidance before applying the change.
+- ✓ Field-level validation errors displayed inline in RuntimeSettingsDrawer
+- ✓ Apply button blocked when validation errors exist
+- ✓ Recovery guidance shown per field
+
+## Implementation Evidence
+
+- `tauri-app/src/features/runtime/runtime-utils.ts` — validateSourceMode, validateModelPath, validateModelsDirectory, validateModelFile
+- `tauri-app/src/features/runtime/useRuntimeManager.ts` — validation integrated at lines 79-82, 203-208, 236-239
+- `tauri-app/src/features/runtime/types.ts` — validation types defined
+
+## Notes
+
+Phase 5 implementation was completed as part of Phase 4 work. The phase directory was missing but all code artifacts are present and verified.