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Feature

You own the slice: contracts, implementation, tests, and handoff notes.

Prompt shape

• Goal: user outcome to enable
• Finish condition: acceptance criteria pass with required checks green
• Evidence: tests/checks run plus any contract or migration notes
• Constraints: docs/contracts before broad implementation; preserve unrelated behavior

Match

New user-facing behavior or capability with a clear outcome.

Steps

Copy these steps into the todo list word for word. Mark skips as skip: <reason>.

1. Restate outcome, evidence/assumptions, scope, non-goals, and acceptance criteria (user-before-feature, thinking-before-typing).
2. Inspect current behavior and name contract, data, permission, and failure impact.
3. Define or update the durable contract before clients (contracts-before-clients).
4. Implement the narrowest complete vertical slice with real failure states (smallest-complete-slice).
5. Verify success, validation, denial, and failure paths (prove-it-works, validate-every-boundary).
6. Report what shipped, verification, residual risk, and rollout/recovery notes.

Principles to cite by name

• user-before-feature
• thinking-before-typing
• contracts-before-clients
• smallest-complete-slice
• prove-it-works

Reply: outcome met, key files, verification evidence, and residual risk.