Vertical Slicing

Break a plan into thin, vertical slices that each deliver a complete path through all layers (schema, API/backend, UI, tests). Each slice is independently demoable and verifiable.

Process

1. Gather context

Work from whatever is already available:

• If the user passes a file path → read the spec
• If the user passes a GitHub issue number → fetch with gh issue view <number>
• If neither → work from conversation context

Also read relevant domain documentation:

• docs/CONTEXT_MAP.md for cross-context awareness
• docs/contexts/<name>/CONTEXT.md for the relevant context's invariants and contracts

2. Explore the codebase (if not already done)