[E29-S01-T02] Duplicate checksum returns existing record #303

New Issue

2026-08-27T08:05:12Z

kpcto commented

2026-08-27 08:05:12 +00:00

Parent story: [E29-S01] Upload endpoint and validation (#112)

Intent

De-duplicate uploads by checksum so identical bytes reuse the existing media record.

Acceptance criteria

Compute SHA-256 on ingest for every accepted upload
Return the existing media record when the checksum matches a stored duplicate instead of storing again

Explicitly out of scope

Size and MIME rejection is covered by E29-S01-T01
Safe object key generation is covered by E29-S01-T03

Test plan

Upload identical bytes twice and assert one record with the matching checksum is returned

Rollback note

Revert the de-duplication lookup; existing records are unchanged

Owning stream

platform

Risk quadrant

agent-full

> Parent story: [E29-S01] Upload endpoint and validation (#112) ## Intent De-duplicate uploads by checksum so identical bytes reuse the existing media record. ## Acceptance criteria - Compute SHA-256 on ingest for every accepted upload - Return the existing media record when the checksum matches a stored duplicate instead of storing again ## Explicitly out of scope - Size and MIME rejection is covered by E29-S01-T01 - Safe object key generation is covered by E29-S01-T03 ## Test plan - Upload identical bytes twice and assert one record with the matching checksum is returned ## Rollback note - Revert the de-duplication lookup; existing records are unchanged ### Owning stream platform ### Risk quadrant agent-full

kpcto added this to the Sprint M milestone 2026-08-27 08:05:12 +00:00

kpcto added the

labels 2026-08-27 08:05:12 +00:00

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