diff --git a/docs/04-api-contracts.md b/docs/04-api-contracts.md
index deccc5b..4cad933 100644
--- a/docs/04-api-contracts.md
+++ b/docs/04-api-contracts.md
@@ -36,8 +36,10 @@ update_live_notes(input: { meetingId: MeetingId; markdown: string }): void
 set_segment_note(input: { meetingId: MeetingId; anchorMs: number; text: string }): void
 
 // ---- Hardware ----
-hardware_status(): { backends: BackendInfo[]; active: BackendId; modelSize: string; estRtf: number }
+hardware_status(): { backends: BackendInfo[]; active: BackendId; modelSize: string; estRtf: number }  // re-detects fresh each call — backs the Settings ▸ Hardware "Refresh" button
 set_preferred_backend(input: { backend: BackendId | "auto" }): void
+// Launch-at-login (NFR-RES-4). Writes/removes a per-user OS Run entry (no admin) and persists auto_start. Opt-in, off by default.
+set_auto_start(input: { enabled: boolean }): void
 
 // ---- Transcription / models ----
 // language (T8.7, M4.2): omitted reuses the meeting's current language rather than resetting it.