Status: ready-for-agent

# 22 — DOC: MEMORY.md + project-status alpha-hardening index

## What to build

Update persistent memory files so agents and humans find the alpha-hardening feature without stale handoff paths.

## Acceptance criteria

- [ ] `.claude/memory/MEMORY.md` — index entry for alpha-hardening (`.scratch/alpha-hardening/`, ADRs 0016–0019, issue count)
- [ ] `.claude/memory/project-status.md` — brief alpha-hardening section: planning complete, Bucket 1 blockers next, link README
- [ ] Cross-link `.scratch/alpha-hardening/handoff.md` from README (not temp path)

## ADR links

- [ADR-0016](../../docs/adr/0016-alpha-scope-and-known-limitations.md)

## Blocked by

None — parallel with other Bucket 3 doc issues