popiart-node-canvas/.planning/phases/05-image-url-server/05-01-SUMMARY.md

phase	plan	subsystem	tags	requires	provides	affects	tech-stack	key-files	key-decisions	patterns-established	issues-created	duration	completed
05-image-url-server	1	api	[next.js api-routes image-serving in-memory-cache]	{phase 03-02} {provides Server-side provider execution pattern}] [{phase 02-03} {provides TTL-based caching pattern (adapted to no-TTL for explicit cleanup)}	[In-memory image store with explicit cleanup Image serving API endpoint (/api/images/[id]) uploadImageForUrl utility returning URL + ID for cleanup shouldUseImageUrl threshold detection (256KB)]	[05-02 generate-node provider-execution]	[{added [crypto.randomUUID]} {patterns [explicit-cleanup-vs-ttl request-scoped-resources]}]	[{created [src/lib/images/store.ts src/lib/images/index.ts src/app/api/images/[id]/route.ts]} {modified []}]	[No TTL for image store - callers responsible for cleanup after provider fetches Return both URL and ID from uploadImageForUrl to enable cleanup 256KB threshold matches Replicate recommendation for URL vs base64]	[Explicit cleanup pattern: store returns ID, caller deletes after use]	[]	3min	2026-01-09

Phase 5 Plan 01: Image Serving Endpoint Summary

In-memory image store with explicit cleanup, serving endpoint at /api/images/[id], and uploadImageForUrl utility returning URL+ID

Performance

• Duration: 3 min
• Started: 2026-01-09T09:41:34Z
• Completed: 2026-01-09T09:44:59Z
• Tasks: 3
• Files modified: 3

Accomplishments

• In-memory Map-based image store with storeImage/getImage/deleteImage/deleteImages
• API endpoint serving stored images with correct Content-Type and Cache-Control: no-store
• uploadImageForUrl utility returning { url, id } for cleanup after use
• shouldUseImageUrl threshold check for 256KB (Replicate's recommendation)

Task Commits

Each task was committed atomically:

1. Task 1: Create in-memory image store - 5cbff58 (feat)
2. Task 2: Create image serving API endpoint - 9e85f0b (feat)
3. Task 3: Create uploadImageForUrl utility - 49ad058 (feat)

Plan metadata: 5ebea8d (docs: complete plan)

Files Created/Modified

• src/lib/images/store.ts - Map-based store with storeImage, getImage, deleteImage, deleteImages
• src/app/api/images/[id]/route.ts - GET endpoint serving stored images with proper headers
• src/lib/images/index.ts - uploadImageForUrl and shouldUseImageUrl utilities, re-exports store

Decisions Made

• No TTL for image store - using explicit cleanup pattern instead (callers delete after provider fetches)
• Return both URL and ID from uploadImageForUrl to enable cleanup
• 256KB threshold for shouldUseImageUrl matches Replicate's documented recommendation

Deviations from Plan

Auto-fixed Issues

1. [Rule 3 - Blocking] Buffer to Uint8Array conversion in API route

• Found during: Task 2 (API endpoint implementation)
• Issue: NextResponse doesn't directly accept Buffer, needed Uint8Array
• Fix: Convert Buffer to Uint8Array in response
• Files modified: src/app/api/images/[id]/route.ts
• Verification: Build succeeds, TypeScript compiles
• Committed in: 9e85f0b (Task 2 commit)

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Total deviations: 1 auto-fixed (blocking), 0 deferred Impact on plan: Minor implementation detail, no scope change

Issues Encountered

None

Next Phase Readiness

• Image serving infrastructure complete and ready for integration
• Next plan (05-02) will integrate with generate node for URL-based providers
• No blockers

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Phase: 05-image-url-server Completed: 2026-01-09