Write the decision record for direct-to-storage document upload
The team is choosing whether large document bytes should pass through the API or go directly to controlled object storage.
- Focused work estimate
- 2h + prerequisites
- Priority in the scenario
- Medium
- Engineering practice
- Architecture decisions · Storage contracts
Estimated field mix
- System design50%
- Storage systems30%
- Security20%
Field percentages are editorial estimates of the ticket's engineering focus. They total 100%; they are not measured time, proficiency scores, or ownership evidence.
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Project context
A fictional procurement portal extracts metadata from uploaded documents. Product wants a responsive upload flow; security wants parser failures isolated from customer-facing processes.
Setup prerequisites
- Create synthetic upload metadata and a fake processing provider.
- Treat diagrams as proposals; implement only local contract probes.
Preceding work
Complete these dependencies, or supply their agreed outputs before taking this ticket.
Acceptance criteria
- Compare bandwidth, authorization and retry responsibilities.
- Specify capability scope, expiry and finalization checks.
- Name conditions that would justify revisiting the choice.
Implementation constraints
- Use a provider-neutral capability contract and hypothetical costs.
Verification to include
- Trace a successful capability upload and verified finalization.
- Trace expired capability and changed-object cases without accepting an unverified document.
Deliverables
- Upload architecture decision record
Rollout and recovery
Review the decision with a local capability fixture; defer provider rollout until its checks exist.
Value of the work
For the engineer: Practice boundary decisions backed by executable consistency and failure checks.
For the team: Review architecture tradeoffs with explicit assumptions before infrastructure commitment.
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.