docs(memory): document session-start memory and config defaults

docs/plans/state.json

@@ -104,6 +104,28 @@
       ],
       "test_status": "planning/docs update only; no runtime code changes"
     },
+    "pi_personal_assistant_memory": {
+      "status": "completed",
+      "date": "2026-02-25",
+      "updated": "2026-02-25",
+      "commit": "a76bc94b4dc246440d7ee99c87cf4012c451d418",
+      "summary": "Two-tier personal assistant memory: working memory (user/working, TTL-based) written on compaction, injected at session start; unified user/* namespace across channels; parameterized compaction prompt; memory extraction routed to user/facts; proactive session greeting option.",
+      "files_modified": [
+        "src/config/schema.ts",
+        "src/memory/workingMemory.ts",
+        "src/memory/workingMemory.test.ts",
+        "src/backends/native/prompts.ts",
+        "src/context/compaction.ts",
+        "src/backends/native/orchestrator.ts",
+        "src/backends/native/orchestrator.test.ts",
+        "src/daemon/routing.ts",
+        "docs/architecture/AGENT_DIAGRAM.md",
+        "docs/architecture/GATEWAY_SESSIONS_AND_QUEUE.md",
+        "docs/api/PROTOCOL.md",
+        "docs/plans/state.json"
+      ],
+      "test_status": "pnpm test:run + pnpm typecheck passing"
+    },
     "pi-embedded-manual-runtime-mode-control": {
       "status": "completed",
       "date": "2026-02-24",
@@ -6765,7 +6787,7 @@
     }
   },
   "overall_progress": {
-    "total_test_count": 2022,
+    "total_test_count": 2524,
     "all_tests_passing": true,
     "p0_completion": "3/3 (100%)",
     "p1_completion": "4/4 (100%)",