The desktop /agent slash path runs before the normal query loop, so the old implementation waited for the forked command to finish and only surfaced the final local-command stdout. Emit foreground slash-agent task events from /agent, drain SDK events while QueryEngine waits for pre-query slash processing, and allow those current-turn events through the WebSocket pre-send mute gate.
Constraint: /agent is a forked slash command that does not produce ordinary assistant deltas until its final stdout is synthesized.
Rejected: Frontend-only loading state | would not expose real forked-agent progress or tool/tool-result updates.
Confidence: high
Scope-risk: moderate
Directive: Keep slash_agent task events scoped to /agent; ordinary slash command stdout and /goal event handling should remain on the existing local-command paths.
Tested: bun test src/QueryEngine.test.ts src/utils/processUserInput/processSlashCommand.test.ts src/server/__tests__/ws-memory-events.test.ts
Tested: cd desktop && bun run test -- --run src/stores/chatStore.test.ts src/components/chat/MessageList.test.tsx
Not-tested: bun run check:server is blocked by expired quarantine review entries: server:cron-scheduler, server:providers-real, server:tasks, server:e2e:business-flow, server:e2e:full-flow
Desktop users need a direct way to pick an installed Agent from slash completion while preserving the existing command and skill namespace. Add /agent <agent> <prompt> as the single execution surface and render active agents as namespaced completion rows.
Constraint: Existing slash command names and ordering must remain authoritative.
Rejected: Register each Agent as a top-level /<agent> command | would collide with built-in commands, skills, and future custom commands.
Confidence: high
Scope-risk: moderate
Tested: bun run verify
