Features

Core features

Authentication and multi-tenancy

• Google sign-in via Better Auth
• One Corsair tenant per user — credentials encrypted with CORSAIR_KEK
• Onboarding flow connects Gmail and Google Calendar through chained OAuth

AI triage lanes

Inbound mail is classified into four lanes:

Classification runs on webhook events and during initial inbox backfill. Each thread gets a priority (high / medium / low) and optional scheduling intent (proposed times, attendees, duration).

Semantic search

Press / to search classified threads by meaning, not just keywords. Embeddings are stored in pgvector (768 dimensions). Results respect your selected AI provider.

Advanced Gmail search

Press Mod+Shift+F to query your full Gmail mailbox via Corsair's Gmail API integration — filter by sender, date range, lane, attachments, and free-text query.

Hero workflow — email to meeting

Press M on a thread to:

1. Extract scheduling intent from the thread (AI)
2. Show your calendar availability for proposed windows
3. Create a Google Calendar event with Meet link
4. Generate a confirmation reply draft

Reschedule with M again on a thread that already has a linked meeting. Cancel via the command palette.

Agent chat

An in-app agent uses typed workflow tools (send_email, create_calendar_invite, search_threads, etc.) plus Corsair discovery tools (list_operations, get_schema). Write actions require explicit user approval in the UI. run_script is not used in the in-app agent.

Example prompt:

Send a calendar invite to friend@corsair.dev at 9 AM next Thursday and draft a confirmation reply.

Keyboard UX

• Superhuman-style single-key navigation (J / K, E, R, M, S)
• Command palette at Mod+K
• Shortcut cheat sheet at ? (Shift+/)
• Context-aware gating — shortcuts disable when modals are open

Realtime updates

Gmail Pub/Sub push → Corsair webhook handler → classify + embed → Pusher broadcast to the browser. Falls back to 5-second polling if Pusher is not configured.

Send later and snooze

• Snooze threads with S — they reappear when the snooze expires
• Send later queues outbound mail with a 5-second undo window
• External cron hits /api/cron/process-due every minute to dispatch due sends and expire snoozes

Mobile and PWA

• Responsive layout with mobile tabs (Inbox / Thread / Calendar)
• Swipe gestures on thread list
• PWA manifest for add-to-home-screen on Android

Multi-provider AI

• OpenAI (gpt-5-nano) is the default chat model
• Gemini (gemini-2.5-flash) fallback on rate limits or quota errors
• Provider switcher in the UI; switching embedding provider triggers a background re-embed job

Bonus rubric checklist

Corsair SDK features used

• Gmail + Google Calendar plugins (embedded SDK, multi-tenant)
• Webhook-driven cache sync
• MCP adapter (list_operations, get_schema) + typed write tools with approval
• Gmail threads.list for advanced search