diff --git a/.planning/config.json b/.planning/config.json
index b1c95a9..570c45c 100644
--- a/.planning/config.json
+++ b/.planning/config.json
@@ -1,5 +1,5 @@
 {
-  "model_profile": "balanced",
+  "model_profile": "budget",
   "commit_docs": true,
   "parallelization": true,
   "search_gitignored": false,
diff --git a/.planning/phases/01-matrix-qa-polish/01-02-PLAN.md b/.planning/phases/01-matrix-qa-polish/01-02-PLAN.md
index 1f5e277..d924add 100644
--- a/.planning/phases/01-matrix-qa-polish/01-02-PLAN.md
+++ b/.planning/phases/01-matrix-qa-polish/01-02-PLAN.md
@@ -13,7 +13,7 @@ must_haves:
   truths:
     - "!new creates a room and adds it to the user's Space via room_put_state"
     - "!new without space_id returns an error message (not a crash)"
-    - "!archive removes room from Space via room_put_state with empty content"
+    - "!archive archives the chat via chat_mgr.archive; Space child removal (room_put_state) deferred to Phase 2 — requires reverse room_id lookup not available"
     - "!rename calls client.room_set_name if client available"
     - "RoomCreateError is handled gracefully with user-facing message"
   artifacts:
diff --git a/.planning/phases/01-matrix-qa-polish/01-03-PLAN.md b/.planning/phases/01-matrix-qa-polish/01-03-PLAN.md
index 479fb2a..949e4e4 100644
--- a/.planning/phases/01-matrix-qa-polish/01-03-PLAN.md
+++ b/.planning/phases/01-matrix-qa-polish/01-03-PLAN.md
@@ -3,7 +3,7 @@ phase: 01-matrix-qa-polish
 plan: 03
 type: execute
 wave: 2
-depends_on: ["01-01"]
+depends_on: ["01-01", "01-02"]
 files_modified:
   - adapter/matrix/bot.py
   - adapter/matrix/reactions.py
diff --git a/.planning/phases/01-matrix-qa-polish/01-04-PLAN.md b/.planning/phases/01-matrix-qa-polish/01-04-PLAN.md
index e30dbda..969beb3 100644
--- a/.planning/phases/01-matrix-qa-polish/01-04-PLAN.md
+++ b/.planning/phases/01-matrix-qa-polish/01-04-PLAN.md
@@ -524,8 +524,8 @@ async def test_mat05_new_chat_without_space_id_returns_error():
     client.room_create.assert_not_awaited()
 
 
-async def test_mat10_archive_calls_chat_mgr():
-    """MAT-10: !archive archives via chat_mgr."""
+async def test_mat10_archive_calls_chat_mgr_archive():
+    """MAT-10: !archive archives chat via chat_mgr.archive (Space removal deferred)."""
     platform, store, chat_mgr, auth_mgr, settings_mgr = await _setup()
 
     handler = make_handle_archive(None, store)
diff --git a/.planning/phases/01-matrix-qa-polish/01-VALIDATION.md b/.planning/phases/01-matrix-qa-polish/01-VALIDATION.md
index 8df7613..7f94024 100644
--- a/.planning/phases/01-matrix-qa-polish/01-VALIDATION.md
+++ b/.planning/phases/01-matrix-qa-polish/01-VALIDATION.md
@@ -47,7 +47,7 @@ created: 2026-04-02
 | MAT-07 | 03 | 1 | OutgoingUI does NOT send m.reaction | unit | `pytest tests/adapter/matrix/test_send_outgoing.py -x -q` | ⬜ pending |
 | MAT-08 | 03 | 1 | pending_confirm store roundtrip | unit | `pytest tests/adapter/matrix/test_store.py -x -q` | ⬜ pending |
 | MAT-09 | 03 | 2 | !yes/!no reads pending_confirm | unit | `pytest tests/adapter/matrix/test_confirm.py -x -q` | ⬜ pending |
-| MAT-10 | 02 | 2 | !archive calls room_put_state empty | unit | `pytest tests/adapter/matrix/test_chat_space.py -x -q` | ⬜ pending |
+| MAT-10 | 02 | 2 | !archive archives chat via chat_mgr.archive (Space removal deferred) | unit | `pytest tests/adapter/matrix/test_chat_space.py -x -q` | ⬜ pending |
 | MAT-11 | 04 | 2 | !settings returns dashboard | unit | `pytest tests/adapter/matrix/test_dispatcher.py -x -q` | ⬜ pending |
 | MAT-12 | 02 | 1 | RoomCreateError → user message | unit | `pytest tests/adapter/matrix/test_chat_space.py -x -q` | ⬜ pending |