popiart-node-canvas/.planning/phases/02-model-discovery/02-03-SUMMARY.md

phase	plan	subsystem	tags	requires	provides	affects	tech-stack	key-files	key-decisions	patterns-established	issues-created	duration	completed
02-model-discovery	3	api	[caching unified-api model-discovery providers]	{phase 02-01} {provides Replicate provider implementation}] [{phase 02-02} {provides fal.ai provider implementation}	[In-memory model caching with TTL Unified /api/models endpoint for all providers Multi-provider helper functions (listAllModels, searchAllModels) Cache utilities (getCachedModels, setCachedModels, invalidateCache)]	[model-browser generate-node phase-3]	[{added []} {patterns [in-memory caching with TTL unified API aggregation partial failure handling]}]	[{created [src/lib/providers/cache.ts src/app/api/models/route.ts]} {modified [src/lib/providers/index.ts]}]	[10-minute default cache TTL (configurable per call) Cache key format: {provider}:models or {provider}:search:{query} Unified API uses header-based auth (X-Replicate-Key, X-Fal-Key) fal.ai always included in unified response (works without key) Partial failures return successful providers with errors array]	[Cache utilities exported from @/lib/providers for reuse Unified API endpoint pattern at /api/models Multi-provider aggregation with Promise.allSettled]	[]	5min	2026-01-09

Phase 02-03: Model Caching and Unified API Summary

In-memory caching layer and unified /api/models endpoint aggregating Replicate and fal.ai models

Performance

• Duration: 5 min
• Started: 2026-01-09
• Completed: 2026-01-09
• Tasks: 3
• Files created: 2
• Files modified: 1

Accomplishments

• Created in-memory cache utility with 10-minute TTL for model lists
• Built unified /api/models endpoint aggregating all configured providers
• Added cache utilities export from provider index
• Implemented listAllModels and searchAllModels helper functions
• Partial failure handling - returns models from successful providers with errors array

Task Commits

Each task was committed atomically:

1. Task 1: Create model caching utility - 83ef0b4 (feat)
2. Task 2: Create unified models API endpoint - 421620c (feat)
3. Task 3: Add provider module exports - 91a5449 (feat)

Files Created/Modified

• src/lib/providers/cache.ts - In-memory cache with get/set/invalidate and TTL support
• src/app/api/models/route.ts - Unified API aggregating Replicate and fal.ai models
• src/lib/providers/index.ts - Added cache exports and multi-provider helper functions

API Reference

GET /api/models

Query Parameters:

• provider: Optional, filter to "replicate" or "fal"
• search: Optional, search query
• refresh: Optional, set to "true" to bypass cache

Headers:

• X-Replicate-Key: Replicate API key
• X-Fal-Key: fal.ai API key (optional)

Response:

{
  "success": true,
  "models": [...],
  "cached": false,
  "providers": {
    "replicate": { "success": true, "count": 50, "cached": false },
    "fal": { "success": true, "count": 100, "cached": true }
  },
  "errors": []
}

Decisions Made

• Cache uses simple in-memory Map (no LRU, no persistence)
• Default TTL is 10 minutes - balance between freshness and API quota
• Cache key includes search query for separate caching of search results
• fal.ai always included in unified results (works without API key)
• Unified API returns sorted models (by provider, then name)

Deviations from Plan

None - plan executed exactly as written.

Issues Encountered

None.

Phase 2 Complete

This plan completes Phase 2: Model Discovery. All three plans are now done:

1. 02-01: Replicate provider with model fetching
2. 02-02: fal.ai provider with model fetching
3. 02-03: Model caching and unified API

The model discovery infrastructure is ready for Phase 3: Generate Node Refactor.

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Phase: 02-model-discovery Completed: 2026-01-09