docs: round 16 — final stale doc references sweep

KERNEL-IPC-CREDENTIAL, 05-KDE, RELIBC-IPC, AGENTS.md, wip/AGENTS
all updated: COMPREHENSIVE-OS-ASSESSMENT, QT6-PORT-STATUS,
RELIBC-COMPLETENESS replaced with CONSOLE-TO-KDE-DESKTOP-PLAN.md

local/docs/KERNEL-IPC-CREDENTIAL-PLAN.md

@@ -3,7 +3,7 @@
 **Date:** 2026-04-30
 **Scope:** Kernel architecture, IPC infrastructure, credential syscalls, process isolation
 **Implementation status:** Phases K1-K2, K4 ✅ complete. Phases K3, K5 deferred.
-**Status:** This document is the canonical kernel + IPC plan, extending `local/docs/COMPREHENSIVE-OS-ASSESSMENT.md`
+**Status:** This document is the canonical kernel + IPC plan, extending `local/docs/CONSOLE-TO-KDE-DESKTOP-PLAN.md`
 
 ## 1. Purpose
 
@@ -735,7 +735,7 @@ local/scripts/test-credential-syscalls-guest.sh   # In-guest checker
 
 ## 9. References
 
-- `local/docs/COMPREHENSIVE-OS-ASSESSMENT.md` — Canonical comprehensive plan
+- `local/docs/CONSOLE-TO-KDE-DESKTOP-PLAN.md` — Canonical comprehensive plan
 - `docs/01-REDOX-ARCHITECTURE.md` — Architecture reference
 - `local/docs/IRQ-AND-LOWLEVEL-CONTROLLERS-ENHANCEMENT-PLAN.md` — IRQ/PCI plan (sibling)
 - `local/docs/RELIBC-IPC-ASSESSMENT-AND-IMPROVEMENT-PLAN.md` — IPC surface plan (companion)

local/docs/RELIBC-IPC-ASSESSMENT-AND-IMPROVEMENT-PLAN.md

@@ -3,7 +3,7 @@
 ## Purpose
 
 This document is the IPC-focused companion to
-`local/docs/RELIBC-COMPLETENESS-AND-ENHANCEMENT-PLAN.md`.
+`local/docs/CONSOLE-TO-KDE-DESKTOP-PLAN.md`.
 
 Its job is to describe the current IPC-facing relibc surface honestly, especially where the active
 Red Bear build depends on recipe-applied compatibility layers rather than plain-source upstream