diff --git a/server.py b/server.py
index e98d8aa..fdab249 100644
--- a/server.py
+++ b/server.py
@@ -932,6 +932,12 @@ LEAN_TOOL_NAMES = frozenset(
         "pid_symbol_insert",
         "pid_line_draw",
         "pid_graph",
+        # Styles (track E) — a lean client *uses* a style far more often than
+        # it authors one; drawing_apply_standard authors the whole set in one
+        # call when it must.
+        "dimstyle_set_current",
+        "textstyle_set_current",
+        "drawing_apply_standard",
     }
 )
 
diff --git a/tests/data/discovery_golden.py b/tests/data/discovery_golden.py
index 3ed8b4c..fb20aaa 100644
--- a/tests/data/discovery_golden.py
+++ b/tests/data/discovery_golden.py
@@ -1,6 +1,6 @@
 """Golden query set for tool discovery: English in, one right tool out.
 
-Sixty-six cases (51 tuning + 15 holdout) split into a **tuning** set and a
+Seventy-one cases (56 tuning + 15 holdout) split into a **tuning** set and a
 **holdout** set. The split is
 the point of the file. Ranking work is measured against
 :data:`TUNING_CASES` only; :data:`HOLDOUT_CASES` were written at the same time,
@@ -143,6 +143,18 @@ TUNING_CASES: tuple[GoldenCase, ...] = (
         "counting",
         risk="read",
     ),
+    # Styles (track E). DIMSTYLE / STYLE / MLEADERSTYLE are umbrella commands
+    # shared by their list/create/modify/set-current tools, so the one command
+    # case uses the command unique to a single tool and the rest are phrased.
+    GoldenCase("DDIM", "dimstyle_create", "command"),
+    GoldenCase("make ISO-25 the current dimension style", "dimstyle_set_current", "paraphrase"),
+    GoldenCase(
+        "set the drawing up to the ISO drafting standard in one go",
+        "drawing_apply_standard",
+        "paraphrase",
+    ),
+    GoldenCase("create a text style that uses the isocp font", "textstyle_create", "paraphrase"),
+    GoldenCase("which dimension styles are defined", "dimstyle_list", "counting", risk="read"),
 )
 
 
diff --git a/tests/test_styles.py b/tests/test_styles.py
index c4995cc..1c91e5b 100644
--- a/tests/test_styles.py
+++ b/tests/test_styles.py
@@ -1716,3 +1716,20 @@ async def test_com_apply_standard_creates_both_styles_and_sets_units(com_backend
     assert ("ActiveTextStyle", "ISOCP") in document.calls
     assert document.ActiveDimStyle.Name == "ISO-25"
     assert document.variables["DIMDSEP"] == "," and document.variables["INSUNITS"] == 4
+
+
+# ── profile decision ────────────────────────────────────────────────────────
+
+
+async def test_lean_carries_the_two_set_current_tools_and_apply_standard_only():
+    import server
+
+    lean = server.LEAN_TOOL_NAMES
+    assert {"dimstyle_set_current", "textstyle_set_current", "drawing_apply_standard"} <= lean
+    assert not (STYLE_TOOLS - {"dimstyle_set_current", "textstyle_set_current"}) & lean, (
+        "authoring and listing styles is full-profile work"
+    )
+    claimed = set().union(*server.PACK_TOOL_NAMES.values())
+    assert not claimed & (STYLE_TOOLS | {"drawing_apply_standard"}), (
+        "styles are core: no pack may claim them"
+    )