Bind multipart upload sessions to organization and object identity
A session ID can currently be reused against a different object. Require its original scope on every part operation.
- Focused work estimate
- 2h + prerequisites
- Priority in the scenario
- High
- Engineering practice
- Authorization · Identity
Estimated field mix
- Security60%
- Storage systems40%
Field percentages are editorial estimates of the ticket's engineering focus. They total 100%; they are not measured time, proficiency scores, or ownership evidence.
Review it, then add it to your workspace.
The board opens an editable draft; nothing is saved until you confirm it. Sign-in and workspace permissions apply, and Demo boards remain ephemeral.
Project context
Fictional document archive Fern stores synthetic byte objects. Use a local S3-compatible adapter or deterministic in-memory provider; no cloud credentials are needed.
Setup prerequisites
- Generate small deterministic byte fixtures.
- Implement local multipart provider responses including timeout and missing parts.
Preceding work
Complete these dependencies, or supply their agreed outputs before taking this ticket.
Acceptance criteria
- Matching owner uploads
- Foreign organization is denied
- Changed object identity is rejected
Implementation constraints
- Enforce scope in the repository/provider boundary.
Verification to include
- Upload own part
- Reuse session against foreign object
Deliverables
- Scoped session adapter and denial cases
Rollout and recovery
Pause multipart writes if scope is uncertain.
Value of the work
For the engineer: Practice object lifecycle, retry semantics and integrity verification.
For the team: Inspect whether uploads avoid corruption, orphan cost and tenant crossover.
Evidence boundaries
Outcome Evidence: Tests, patches, and runbooks are requested deliverables. They become Outcome Evidence only through a qualified Mission and immutable Evidence IDs.
Ownership Evidence: Independent adaptation must be observed under a declared verification policy and cite immutable Evidence IDs. Completing a planning ticket establishes no Ownership Evidence.