Maintainer sync: port reusable production learnings

Purpose

Keep this starter current as real SaaS iMessage channels expose new product, reliability, privacy, analytics, and Apple-client lessons.

Follow docs/MAINTAINER-SYNC.md. Never copy private transcripts, customer data, credentials, private URLs, proprietary prompts, or product-specific identifiers into this repository.

Current reusable roadmap

• #1 Immediate-value first conversation
• #2 Bounded tools and reversible writes
• #3 Consent-first proactive check-ins
• #4 Failure recovery and delivery reconciliation
• #5 Provider canary and physical iMessage QA
• #6 PostHog MCP Analytics dashboards and alerts
• #7 Exact handoffs and rich previews

Recurring review

• Port generic regression tests before fixes
• Review Eve, Vercel, Linq, PostHog, Next.js, and Workflow changes
• Review dependency/security alerts
• Verify simulator, deploy button, docs, and eval harness
• Triage community issues and discussions
• Update CHANGELOG.md and roadmap

The scheduled maintenance workflow leaves this issue as the single open reminder. Close it only after creating a successor or intentionally ending the sync process.