[andrebrait]

What

A Needs attention section above Workspaces lists the sessions that wait on the user, in the same host → workspace → session tree, rows and badges as Workspaces. It is hidden while empty, always alphabetical, and has no pin, reorder, sort, filter or add controls. Sessions stay in Workspaces too.

A session needs attention while either holds:

1. An open blocking dialog (ask, confirm, select, input, editor, open_url): tool permission prompts, and omp-web's own send_to_session/new_session confirmations. This uses the awaitingInput flag from feat(sidebar): mark sessions waiting for user input #461.
2. The agent asked for the user. ompweb's omp build (runner/) gives every top-level session a request_attention({ reason }) tool (an SDK customTools entry, loadMode: "essential"). It appends an omp-web-attention custom entry. The session list's tail scan reports it as SessionInfo.attention while no real user message and no further agent tool call follows it, and the client shows it only while the session is not running. It persists in the session file, so it survives idle reaping and restarts.

Design: docs/specs/2026-11-13-attention-sidebar-design.md.

Notes

• Linked hosts: a remote daemon's attention field passes through sessionEntry (lib/hosts/hub.ts); a malformed value drops only that field. Older daemons omit it, and older hubs strip it.
• The section is capped at 40% of the sidebar height and scrolls on its own.

Verification

• npx tsc --noEmit -p .; bun test --parallel components/SessionSidebar*.test.mjs lib/session-reader.test.mjs lib/hosts/hub.test.mjs lib/i18n.test.mjs (163 pass); runner bun test (29 pass, includes runner/test/attention.test.ts).
• Built UI checked in a headless browser with seeded sessions: section placement, only the marked session listed, a stale marker not listed, no pin control, independent collapse, unaffected by search, 40% cap with scrolling, light and dark themes.
• Before the rebase onto feat: run ompweb's own omp build over its own channel instead of RPC #473, the stock-omp version was checked against a real omp 18.18.8 (--tools, --no-tools, rpc-ui); the runner version is covered by the runner test but has not run against a live model.