The gauge was maintained by conditional inc on "this sessionId isn't
in the in-memory `docs` Map yet" and dec on "last client for the
sessionId left." Because `docs` caches entries indefinitely — even
after every client disconnects — a reconnect found the doc still
cached, skipped the inc, then decremented again on the next
disconnect. Every reconnect-after-last-disconnect leaked one
decrement. After a day of normal reload / wifi-blip / tab-hibernate
patterns the gauge hit -182.
Replace the transitions with a `set()` derived from the live `conns`
map: count distinct session ids with at least one open WebSocket.
Self-correcting, no drift possible.
Extract `countActiveSessions()` as a pure helper + unit tests
including a regression case that simulates repeated reconnect/
disconnect cycles on one session and asserts the count never goes
negative.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
plannerActiveSessions and plannerConnectedClients were registered
but never updated — they always reported 0. Now incremented on
WebSocket connect and decremented on close.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
The production server was sending raw Yjs updates but the client
(y-websocket's WebsocketProvider) expects the y-protocols sync protocol
with message type headers. This caused "Unexpected end of array" errors
on every connection.
Rewrite to match the Vite dev plugin: use y-protocols/sync for document
sync, y-protocols/awareness for presence, and lib0 for encoding.
Verified locally: server starts, WebSocket connects, sync messages
exchange correctly.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Node's --experimental-strip-types requires explicit .ts extensions on
relative imports. Add allowImportingTsExtensions to both app tsconfigs
and update server-side imports in planner and journal for consistency.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Yjs WebSocket server at /sync/:sessionId for real-time collaboration
- Session creation API (POST /api/sessions) with optional GPX initialization
- Session join page with Planner layout (header, map area, sidebar)
- In-memory session store (PostgreSQL persistence deferred to infra setup)
- Custom production server entry with WebSocket upgrade handling
- Vite path aliases (~/) for clean imports
- Fix tsconfig for apps: noEmit, exclude build dir
Tasks completed: 4.1, 4.3, 4.4, 4.5
Deferred: 4.2 (PostgreSQL), 4.6-4.8 (need client-side Yjs from Group 6)
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
