- CI: add a 'test' job running the unit suite via config/vitest.ci.config.ts. Excludes browser (Playwright/chromium) and perf tests (timing-flaky), like the existing test/mobile suite. Safe in CI: TmuxManager no-ops shell commands under VITEST (test/setup.ts).
- Add scripts/check-frontend-syntax.mjs (node --check on src/web/public/*.js), wired into the lint job — catches a class of frontend SyntaxError that passes lint today (lint globs only TS).
- Add test/security-regression.test.ts (wired Host/Origin guard, self-update CSRF, CSP/security headers, text/plain raw body, WS anti-CSWSH) + test/sse-registry-parity.test.ts (backend<->frontend SSE registry parity).
- Green pre-existing test debt surfaced by the new gate: stale 'Session not found' asserts -> 'not found' substring; drop tests for removed helpers (isError now internal; createSuccessResponse deleted); file-stream-manager: mock realpathSync + fix stale /tmp assertion; sse-subscription-filter: lifecycle events broadcast to all clients (only terminal stream filtered); session.test.ts: mkdir /tmp/test; skip one interactive-respawn test needing a real PTY (covered by respawn-controller.test.ts).
- Full non-mobile suite verified green locally (2680 passed, 12 skipped).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
1. Session-scoped SSE subscriptions: server filters events by session ID,
clients can subscribe via ?sessions=id1,id2 (backwards-compatible)
2. Lazy xterm.js for subagent windows: terminals created on restore,
disposed on minimize — saves ~3.75MB DOM at 50 agents
3. Targeted badge updates: badge count changes update the <span> directly
instead of rebuilding the entire session tab sidebar (O(1) vs O(n))
4. Conditional SSE padding: 8KB Cloudflare padding only on session:terminal
and session:needsRefresh, not every event (~70% bandwidth reduction)
5. Canvas renderer on mobile: skip WebGL addon on mobile devices to reduce
GPU pressure and prevent context loss on weaker mobile GPUs
All 5 implemented in parallel via isolated git worktrees, merged conflict-free.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
