iMessage agent on Convex (Sendblue)

A production-extracted playbook. The references/ directory ships the real code: sendblue-adapter.ts (provider adapter), schema.ts (the four channel tables), webhook-and-brain.ts (HTTP route + enqueue + the brain action with its load-bearing ordering), links.ts (account linking), agent-setup.md (@convex-dev/agent + OpenRouter wiring), testing.md (simulated-webhook fixtures + checklist). Table/function names throughout are a recommended shape, not requirements. (Provenance: extracted from hypersocialinc/savethis, a private repo — this skill is self-contained; don't chase the pointer.)

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