weitao
/
popiart-node-canvas
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
210 Commits
28 Branches
0 Tags
1.2 GiB
 
 
Tree: be2387e1e8
Branches Tags
${ item.name }
Create tag ${ searchTerm }
Create branch ${ searchTerm }
from 'be2387e1e8'
${ noResults }
popiart-node-canvas/.planning/phases/13-fix-duplicate-generations/13-01-SUMMARY.md

2.8 KiB
Raw Blame History

phase plan subsystem tags requires provides affects tech-stack key-files key-decisions patterns-established issues-created duration completed
13-fix-duplicate-generations 1 api [deduplication md5 file-storage] {phase 06-video-and-polish} {provides save-generation API for images and videos} [Content-based deduplication for generations folder Hash-prefixed filenames for O(1) duplicate lookup isDuplicate response field for caller awareness] [] [{added []} {patterns [content-hash-deduplication hash-prefixed-filenames]}] [{created []} {modified [src/app/api/save-generation/route.ts]}] [MD5 for content hashing - fast for binary data, collision resistance not critical for dedup Hash prefix in filename - enables O(1) duplicate check without reading file contents] [Content deduplication via hash prefix in filename] [] 1min 2026-01-12

Phase 13 Plan 01: Add Content Deduplication Summary

MD5 content hashing prevents duplicate files in generations folder with hash-prefixed filenames for O(1) lookup

Performance

  • Duration: 1 min
  • Started: 2026-01-12T10:03:51Z
  • Completed: 2026-01-12T10:04:52Z
  • Tasks: 2
  • Files modified: 1

Accomplishments

  • Added MD5 content hashing to save-generation API
  • Implemented duplicate detection by hash prefix lookup
  • Changed filename format to {hash}_{prompt}.{ext} for fast dedup checks
  • Added isDuplicate boolean to API response for caller awareness
  • Added deduplication event logging for observability

Task Commits

Each task was committed atomically:

  1. Task 1 & 2: Content hashing and duplicate detection - 0e496bc (feat)

Plan metadata: (this commit)

Note: Tasks 1 and 2 were completed together as the implementation naturally combined both concerns.

Files Created/Modified

  • src/app/api/save-generation/route.ts - Added crypto import, hash computation, duplicate check, hash-prefixed filenames, isDuplicate response field

Decisions Made

  • MD5 over SHA256: MD5 is faster for binary data and collision resistance is not critical for local file deduplication (worst case is a rare false duplicate, not a security issue)
  • Hash in filename: Enables O(1) duplicate lookup via files.find(f => f.startsWith(hash)) instead of reading/hashing all existing files

Deviations from Plan

None - plan executed exactly as written.

Issues Encountered

None

Next Phase Readiness

  • Phase 13 complete (single plan phase)
  • Deduplication active for all new generations
  • Existing files in generations folder (without hash prefix) will not be deduplicated against, but new files will deduplicate against each other
  • Ready for Phase 14: Fix Drag-Connect Node Creation Bugs

Phase: 13-fix-duplicate-generations Completed: 2026-01-12