docs(06-03): complete custom model parameters plan

Tasks completed: 3/3
- Add schema endpoint and model schema fetching
- Add parameter UI component
- Pass parameters through generation pipeline

SUMMARY: .planning/phases/06-video-and-polish/06-03-SUMMARY.md

Resolved: ISS-001 - Generate nodes now adapt to model requirements

.planning/ISSUES.md

@@ -0,0 +1,18 @@
+# Issues
+
+Deferred enhancements and improvements discovered during development.
+
+## Open Issues
+
+(None currently)
+
+## Resolved Issues
+
+### ISS-001: Generate node should adapt to model requirements
+
+**Discovered:** 2026-01-09 during UAT for Phase 5
+**Resolved:** 2026-01-10 in Phase 06-03 (Custom model parameters)
+**Resolution:** Added /api/models/[modelId] endpoint to fetch model parameter schemas from Replicate and fal.ai. Created ModelParameters component that renders dynamic inputs based on schema. Parameters flow through to providers during generation.
+
+---
+*Last updated: 2026-01-10*

.planning/ROADMAP.md

@@ -86,7 +86,7 @@ Plans:
 Plans:
 - [x] 06-01: GenerateVideo node with video-capable model selector
 - [x] 06-02: Video playback in output node
-- [ ] 06-03: Custom model parameters from provider schemas
+- [x] 06-03: Custom model parameters from provider schemas
 - [ ] 06-04: Edge case handling and final polish
 
 ## Progress
@@ -101,4 +101,4 @@ Phases execute in numeric order: 1 → 2 → 3 → 4 → 5 → 6
 | 3. Generate Node Refactor | 3/3 | Complete | 2026-01-09 |
 | 4. Model Search Dialog | 2/2 | Complete | 2026-01-09 |
 | 5. Image URL Server | 2/2 | Complete | 2026-01-09 |
-| 6. Video & Polish | 2/4 | In progress | - |
+| 6. Video & Polish | 3/4 | In progress | - |

.planning/STATE.md

@@ -10,18 +10,18 @@ See: .planning/PROJECT.md (updated 2026-01-09)
 ## Current Position
 
 Phase: 6 of 6 (Video & Polish)
-Plan: 2 of 4 in current phase
+Plan: 3 of 4 in current phase
 Status: In progress
-Last activity: 2026-01-09 - Completed 06-02-PLAN.md (Video playback in output node)
+Last activity: 2026-01-10 - Completed 06-03-PLAN.md (Custom model parameters)
 
-Progress: [====================================================================================] 93% (14/15 plans)
+Progress: [======================================================================================] 100% (15/15 plans)
 
 ## Performance Metrics
 
 **Velocity:**
-- Total plans completed: 14
-- Average duration: 7.1 min
-- Total execution time: 1.65 hours
+- Total plans completed: 15
+- Average duration: 6.9 min
+- Total execution time: 1.73 hours
 
 **By Phase:**
 
@@ -32,11 +32,11 @@ Progress: [=====================================================================
 | 3. Generate Node Refactor | 3/3 | 13 min | 4.3 min |
 | 4. Model Search Dialog | 2/2 | 17 min | 8.5 min |
 | 5. Image URL Server | 2/2 | 5 min | 2.5 min |
-| 6. Video & Polish | 2/4 | 38 min | 19 min |
+| 6. Video & Polish | 3/4 | 43 min | 14.3 min |
 
 **Recent Trend:**
-- Last 5 plans: 15 min, 3 min, 2 min, 10 min, 28 min
-- Trend: increased (human verification checkpoint)
+- Last 5 plans: 3 min, 2 min, 10 min, 28 min, 5 min
+- Trend: returned to normal after human verification checkpoint
 
 ## Accumulated Context
 
@@ -73,10 +73,14 @@ Recent decisions affecting current work:
 - 256KB threshold for shouldUseImageUrl (Replicate recommendation)
 - Gemini excluded from video node (doesn't support video generation)
 - Large videos (>20MB) return URL instead of base64 to avoid memory issues
+- Fetch schema from provider API at model selection time with 10-min cache
+- Filter internal params, prioritize user-relevant ones (seed, steps, guidance)
+- Collapsible parameters section to keep node UI compact
 
 ### Deferred Issues
 
 - UAT-001: Provider icons should use real logos (minor, cosmetic)
+- ISS-001: Resolved - Generate nodes now adapt to model requirements via dynamic parameters
 
 ### Blockers/Concerns
 
@@ -84,7 +88,7 @@ Recent decisions affecting current work:
 
 ## Session Continuity
 
-Last session: 2026-01-09
-Stopped at: Completed 06-02-PLAN.md (Video playback in output node)
+Last session: 2026-01-10
+Stopped at: Completed 06-03-PLAN.md (Custom model parameters)
 Resume file: None
-Next action: Execute 06-03-PLAN.md (Custom model parameters)
+Next action: Execute 06-04-PLAN.md (Final polish and cleanup)

.planning/phases/06-video-and-polish/06-03-SUMMARY.md

@@ -0,0 +1,119 @@
+---
+phase: 06-video-and-polish
+plan: 03
+subsystem: api, ui
+tags: [openapi, parameters, replicate, fal, schema]
+
+# Dependency graph
+requires:
+  - phase: 06-02
+    provides: Video playback in output node
+provides:
+  - Model parameter schema fetching endpoint
+  - Dynamic parameter UI component
+  - Parameter passing through generation pipeline
+affects: [external-providers, generate-nodes]
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns:
+    - Schema fetching and caching for model parameters
+    - Dynamic UI generation from OpenAPI schema
+
+key-files:
+  created:
+    - src/app/api/models/[modelId]/route.ts
+    - src/components/nodes/ModelParameters.tsx
+  modified:
+    - src/lib/providers/types.ts
+    - src/types/index.ts
+    - src/components/nodes/GenerateImageNode.tsx
+    - src/components/nodes/GenerateVideoNode.tsx
+    - src/store/workflowStore.ts
+    - src/app/api/generate/route.ts
+
+key-decisions:
+  - "Fetch schema from provider API at model selection time"
+  - "Filter internal params, prioritize user-relevant ones (seed, steps, guidance)"
+  - "Collapsible parameters section to keep UI compact"
+  - "Skip array type parameters for now (complex)"
+
+patterns-established:
+  - "Schema endpoint: /api/models/[modelId]?provider=..."
+  - "10-minute cache TTL for schema data"
+
+issues-created: []
+
+# Metrics
+duration: 5min
+completed: 2026-01-10
+---
+
+# Phase 6 Plan 3: Custom Model Parameters Summary
+
+**Dynamic model parameters fetched from provider schemas, enabling seed, steps, guidance, and other model-specific inputs**
+
+## Performance
+
+- **Duration:** 5 min
+- **Started:** 2026-01-10T09:39:02Z
+- **Completed:** 2026-01-10T09:44:35Z
+- **Tasks:** 3
+- **Files modified:** 8
+
+## Accomplishments
+
+- Created /api/models/[modelId] endpoint for fetching model parameter schemas
+- Added ModelParameter interface to type system
+- Built reusable ModelParameters component with collapsible UI
+- Integrated parameters into Generate and GenerateVideo nodes
+- Parameters flow through workflowStore to API route to providers
+- Resolved ISS-001: Generate node now adapts to model requirements
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Add schema endpoint and model schema fetching** - `beb0af3` (feat)
+2. **Task 2: Add parameter UI component** - `1e60f18` (feat)
+3. **Task 3: Pass parameters through generation pipeline** - `e7ebee2` (feat)
+
+**Plan metadata:** (pending)
+
+## Files Created/Modified
+
+- `src/app/api/models/[modelId]/route.ts` - New endpoint for fetching model parameter schemas
+- `src/lib/providers/types.ts` - Added ModelParameter interface
+- `src/components/nodes/ModelParameters.tsx` - New collapsible parameter inputs component
+- `src/types/index.ts` - Added parameters field to NanoBananaNodeData and GenerateVideoNodeData
+- `src/components/nodes/GenerateImageNode.tsx` - Integrated ModelParameters component
+- `src/components/nodes/GenerateVideoNode.tsx` - Integrated ModelParameters component
+- `src/store/workflowStore.ts` - Include parameters in request payloads
+- `src/app/api/generate/route.ts` - Added logging for custom parameters
+
+## Decisions Made
+
+- Fetch schema from provider API when model is selected (not upfront)
+- Filter out internal parameters (webhook, sync_mode, etc.)
+- Prioritize common parameters (seed, steps, guidance_scale, negative_prompt)
+- Use 10-minute cache TTL for schema data (same as model lists)
+- Collapsible "Parameters" section to keep node UI compact
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+
+None
+
+## Next Phase Readiness
+
+- Model parameters feature complete
+- ISS-001 resolved
+- Ready for next plan (06-04)
+
+---
+*Phase: 06-video-and-polish*
+*Completed: 2026-01-10*