Document Feature

You just implemented or modified a feature. Now add or update its documentation across all relevant files.

What to do

1. Read the current help content at src/constants/helpContent.ts to understand the existing structure.
2. Determine where the feature belongs. The 13 existing categories are:
   • getting-started — First-time setup (accounts, sync, client ID)
   • reading-email — Thread view, reading pane, mark-as-read
   • composing — Compose, reply, undo send, schedule, signatures, templates, aliases, drafts
   • search-navigation — Search operators, command palette, keyboard shortcuts
   • organization — Labels, smart folders, filters, quick steps, star/pin/mute, archive/trash, multi-select, drag & drop
   • productivity — Snooze, follow-up reminders, split inbox, spam
   • ai-features — AI overview, summaries, smart replies, compose, Ask Inbox
   • newsletters — Newsletter bundles, unsubscribe
   • notifications-contacts — Notifications/VIP, contact sidebar
   • security — Phishing, auth badges, remote images, link confirmation
   • calendar — Google Calendar
   • appearance — Theme, accent colors, font/density, layout
   • accounts-system — Multi-account, system tray, global shortcut, pop-out windows
3. Add a new HelpCard to the appropriate category's cards array, or update an existing card if the feature enhances something already documented. Each card needs:

   {
     id: "kebab-case-unique-id",        // unique across ALL categories
     icon: SomeLucideIcon,              // import from lucide-react
     title: "Short user-facing title",  // what users see
     summary: "One-line summary shown when collapsed (~40-60 chars).",
     description: "Detailed explanation shown when the card is expanded. 3-5 sentences covering what it does, how it works, and practical details. Write from the USER's perspective, not a developer's.",
     tips?: [                           // optional but recommended
       { text: "How to use it or a useful detail" },
       { text: "Keyboard shortcut", shortcut: "key" },
     ],
     relatedSettingsTab?: "general",    // optional, must be a valid tab ID
   }

4. Valid relatedSettingsTab values: general, composing, labels, filters, smart-folders, quickSteps, contacts, accounts, sync, shortcuts, ai, subscriptions, developer
5. If adding a contextual tip (for ? tooltips in the UI), add an entry to the CONTEXTUAL_TIPS record:

   "tip-id": {
     title: "Short title",
     body: "One sentence explaining the setting or feature.",
     helpTopic: "category-id",  // must match a category ID
   }

6. Run the help content tests to validate your additions:

   npx vitest run src/constants/helpContent.test.ts

   The tests check: unique IDs, non-empty titles/descriptions, valid settings tab references, valid contextual tip topic references.
7. Run type-check to make sure icon imports are correct:

   npx tsc --noEmit

8. Update project docs if the feature affects them. Check each file and update as needed:
   • docs/architecture.md — Update if the feature adds new component groups, services, stores, database tables, or changes the project structure tree. Keep counts accurate (component groups, file counts, table counts).
   • docs/development.md — Update if test counts change or new development workflows are introduced.
   • docs/keyboard-shortcuts.md — Update if the feature adds or changes keyboard shortcuts.
   • CLAUDE.md — Update the relevant section (component organization, service layer, key gotchas, etc.) to reflect the new feature.

Writing guidelines

• Write from the user's perspective: "Snooze a thread to temporarily hide it" not "Sets the SNOOZED label via Gmail API"
• Keep descriptions to 2-3 sentences max
• Include keyboard shortcuts in tips when the feature has them
• Add a relatedSettingsTab link when the feature has configurable options
• Pick an icon that visually represents the feature (browse lucide-react icons)

Feature description

$ARGUMENTS