docs: close modern runtime slice K1

docs/plans/2026-07-26-modern-runtime-slice-k.md

@@ -1,6 +1,6 @@
 # Modern runtime Slice K — Linux headless and multi-session host
 
-**Status:** K0 COMPLETE; K1 ACTIVE 2026-07-27
+**Status:** K0–K1 COMPLETE; K2 ACTIVE 2026-07-27
 **Parent:** `2026-07-24-modern-runtime-architecture.md`, Slice K
 **Authorization:** the user approved Slices F–L on 2026-07-24
 **Purpose:** run efficient automated clients on Linux without a display, GPU,
@@ -235,6 +235,22 @@ configuration validation without a graphical/audio/native-window dependency.
 
 ### K1 — portable config, credentials, and single-session CLI
 
+**Complete at `f8cb840f`.** The strict versioned configuration, XDG/Windows
+path owner, redacted environment/stdin/owner-only-file credentials, typed
+direct Runtime command route, canonical presentation-free inbound entity and
+portal route, production single-session host, deterministic exit codes,
+Ctrl+C/SIGTERM cancellation, and retryable teardown transaction are live.
+The explicit `lifecycle-smoke` policy proves connect, enter, inbound state,
+chat, lifestone recall, portal completion/LoginComplete, graceful stop,
+reconnect, second-generation materialization, and terminal convergence.
+
+Windows and Linux/WSL both passed that sequence against the same local ACE
+server. ACE retains its account/session index for roughly two seconds after
+confirming CharacterLogOff, so K1 gives the retiring production connection a
+one-time 2.5-second quiescence suffix before replacement. This is not a
+steady-state scheduler sleep; K2 replaces it with an absolute-deadline
+scheduler transition.
+
 - Implement portable paths and versioned strict config.
 - Implement redacted credential providers.
 - Compose one `GameRuntime`, one `LiveSessionHost`, one command adapter, one