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xarmian
7ef4506cfa
When the browser tab lost focus and regained it, 5 independent onTabResume callbacks all fired simultaneously, flooding the server with redundant requests. This replaces that pattern with a 4-layer sync architecture: 1. Replay buffer — per-workspace ring buffer stores recent events with monotonic IDs. On SSE reconnect, missed events are replayed via Last-Event-ID so the client is already caught up. 2. Last-Event-ID support — SSE handler reads the header, replays from buffer, or sends sync_required if the gap is too large. 3. Incremental sync — new /changes?since=<ms> endpoint returns only modified/deleted items since a timestamp, including archived items for view consistency. 4. Centralized sync coordinator — single decision tree replaces 5 scattered callbacks. Short absences skip sync entirely, SSE-covered gaps need no API calls, and full refresh is a last resort. Key robustness details: - Global event IDs via Redis INCR for multi-instance safety - Server-time cursors to avoid client clock skew - Safe cursor management (only advances on confirmed sync) - 9 new tests for replay buffer and event ID behavior Fixes BUG-26.
Pad Web UI
SvelteKit 2 + Svelte 5 frontend for Pad, compiled to static files and embedded into the Go binary.
Development
npm install
npm run dev # Dev server at localhost:5173 (proxies API to localhost:7777)
npm run build # Production build to build/
npm run check # Type checking with svelte-check
When developing, run the Go backend separately with make dev from the project root.
Building for Production
Do not build in isolation. Always use make build from the project root — this builds the web frontend, then compiles the Go binary with the build output embedded via //go:embed.
Stack
- Svelte 5 with runes (
$state,$derived,$effect) - SvelteKit 2 with
adapter-static(SPA mode) - Tiptap block editor with markdown round-trip
- svelte-dnd-action for drag-and-drop in board/list views
- SSE for real-time updates
- TypeScript throughout
Structure
src/
routes/ SvelteKit pages
+layout.svelte App shell (sidebar + main)
+page.svelte Landing/redirect
[workspace]/
+page.svelte Dashboard (collections, phases, activity)
+layout.svelte SSE connection per workspace
[collection]/
+page.svelte Collection view (board/list)
[collection]/[item]/
+page.svelte Item detail + editor
conventions/ Purpose-built conventions page
playbooks/ Purpose-built playbooks page
settings/ Workspace settings
lib/
api/client.ts HTTP API client
components/
layout/ Sidebar, navigation
editor/ Tiptap editor, raw markdown editor
fields/ FieldEditor, relation picker
items/ ItemCard, ItemDetail
collections/ BoardView, ListView
common/ StatusBadge, badges, modals
search/ CommandPalette
activity/ ActivityFeed
stores/ Svelte 5 reactive stores
workspace.svelte.ts Workspace state
collections.svelte.ts Collection + item state
ui.svelte.ts Sidebar, mobile state
types/index.ts TypeScript types and constants
app.css Global styles and design tokens