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

PLAN.md

@@ -408,9 +408,13 @@ window just fills.
    Attachments/files were re-homed under `/sessions/:id/…` (table above)
    so their lifecycle is the session directory's — delete stays the
    complete path out.
-3. **Usage screen.**
+3. **Usage screen** — *done 2026-08-24.* The undocumented endpoint's
+   `limits[]` array parsed defensively into labeled window bars; cached
+   behind the ≥180 s minimum with no background polling.
 4. **llama.cpp** — LlamaServerManager (local), PiDriver, model change,
-   compaction controls.
+   compaction controls. *Deferred (2026-08-24): pi/llama-server aren't set
+   up in this VM, so this phase isn't testable here — Claude first; the
+   driver seam is ready when it is.*
 5. **SSH** — host config, remote spawn for both kinds, remote llama-server
    with port forward, attachment shipping.
 6. **Polish** — reconnect edges, notification when a session awaits an answer