# Write-First Design

Use prose to resolve uncertain product decisions while changes are cheap. A clear user brief, existing decision document, or narrowly specified UI edit already provides direction; do not require another brief or approval step.

For substantial work with unclear intent, record the intended user outcome, proposed change, rationale, and useful non-goals. Keep this in the response or the project’s existing decision format unless a durable document helps the team.

A useful hypothesis is: “We believe [change] will produce [outcome] because [reason].” Adapt the wording to the decision; the outcome matters more than the template.

Explain meaningful design choices so a collaborator can evaluate them before investing in expensive implementation. Ask only about unresolved choices that would materially change the work. Otherwise state a reasonable assumption and continue within the authorized scope.

Keep the writer close to the builder. Update the rationale when implementation reveals a different tradeoff. Completion is the requested brief, or the implemented and verified change when implementation was requested.

## Source essays

- Write-first design
- Falling in love with the build
- Design for handshakes, not handovers