Record phases 2-3 done, phase 4 deferred

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017xn8nHw1tw1R6PtiY1eEtw

AGENTS.md

@@ -47,10 +47,13 @@ repo is in PLAN.md's "Backend layout" section.
 
 ## Status
 
-Phase 1 (Skeleton) done 2026-08-24 — the whole pipe works end-to-end
-against `EchoDriver`: TLS + token auth, SSE with transcript cursors
-surviving restarts, spawn/message/question/delete from the app. Next:
-phase 2 (Claude driver); phases are in PLAN.md.
+Phases 1–3 done 2026-08-24 (see PLAN.md's phase list for what each
+verified): the skeleton pipe, the full Claude driver (streaming, tools,
+permission + AskUserQuestion cards, steering, interrupt, `--resume`
+crash recovery, images both ways), and the usage screen. Phase 4
+(pi/llama.cpp) is deferred — not testable in this VM. Next: phase 5
+(SSH; needs a decision on how to test — no keys in `~/.ssh` here) and
+real-phone/WireGuard bring-up, which is operational rather than code.
 
 ## Checking your work