# B3 — Wizard completion ordering

## Problem

The wizard printed the success summary / `Mosaic is ready.` during `finalizeStage`, before the gateway configuration stage had completed its daemon health check. If the gateway health gate later failed, the user could see a success claim followed by a gateway failure.

## Diagnosis

`finalizeStage` handled both mutation work and terminal success messaging. Wizard paths then ran `gatewayConfigStage` and `gatewayBootstrapStage` afterward:

1. finalize writes config, links runtime assets, syncs skills, runs doctor;
2. finalize prints `Installation Summary` + `Mosaic is ready.`;
3. gateway config starts/waits for daemon health;
4. gateway bootstrap runs.

The summary needed to be deferred until after the gateway readiness gates.

## Fix

- `finalizeStage` now returns a `showSummary()` callback and supports `deferSummary`.
- Wizard/quick-start paths call finalize with `deferSummary: true`.
- `showSummary()` is called only after gateway config reports ready and bootstrap completes, or immediately when the caller explicitly skips gateway setup.
- If gateway health/config reports not ready, the wizard returns/aborts without printing the success summary.
- Folded in adjacent runtime install hint fix for Pi: `curl -fsSL https://pi.dev/install.sh | sh`.

## Verification

- Added unified-wizard coverage for summary-after-health and no-summary-on-health-failure.
- Targeted: `pnpm --filter @mosaicstack/mosaic test -- unified-wizard finalize-skills`
- `pnpm format:check`
- `pnpm typecheck`
- `pnpm lint`
- `pnpm build`
- `pnpm test`
- Codex code review: approve.
- Codex security review: one low finding on the requested Pi `curl | sh` install hint; no security finding in the wizard completion-ordering change.