diff --git a/hermes_cli/setup.py b/hermes_cli/setup.py
index 9c3c7c1dcd3..7cdbeabe8e9 100644
--- a/hermes_cli/setup.py
+++ b/hermes_cli/setup.py
@@ -3054,6 +3054,12 @@ def _blank_slate_minimal_toolsets(config: dict):
                 continue  # platform composites — not user-facing toolsets
             if isinstance(tdef, dict) and tdef.get("includes"):
                 continue  # composite groupings, not leaf toolsets
+            if isinstance(tdef, dict) and tdef.get("posture"):
+                continue  # posture toolsets (e.g. coding) are session-level
+                # selections made by agent/coding_context.py — not permanent
+                # user-facing disables. Adding them here causes model_tools
+                # to subtract their tools (terminal, read_file, …) from the
+                # minimal Blank Slate surface (#57315).
             all_keys.add(k)
 
         disabled = sorted(all_keys - keep)
diff --git a/tests/hermes_cli/test_setup_blank_slate.py b/tests/hermes_cli/test_setup_blank_slate.py
index a62cf9a2250..b4afd3e138e 100644
--- a/tests/hermes_cli/test_setup_blank_slate.py
+++ b/tests/hermes_cli/test_setup_blank_slate.py
@@ -34,6 +34,17 @@ class TestBlankSlateMinimalToolsets:
         # The recovered non-configurable toolset that used to leak is suppressed.
         assert "kanban" in disabled
 
+    def test_disabled_toolsets_excludes_posture_toolsets(self):
+        """Posture toolsets (e.g. coding) are session-level selections made by
+        agent/coding_context.py — not permanent user-facing disables.  Including
+        them in disabled_toolsets causes model_tools to subtract their tools
+        (terminal, read_file, …) from the minimal Blank Slate surface (#57315).
+        """
+        cfg = {}
+        _blank_slate_minimal_toolsets(cfg)
+        disabled = set(cfg["agent"]["disabled_toolsets"])
+        assert "coding" not in disabled
+
     def test_resolver_yields_exactly_file_and_terminal(self):
         from hermes_cli.tools_config import _get_platform_tools
         cfg = {}
@@ -59,6 +70,30 @@ class TestBlankSlateMinimalToolsets:
         assert names == ["patch", "process", "read_file", "search_files",
                          "terminal", "write_file"]
 
+    def test_tool_schema_survives_disabled_toolsets_from_config(self):
+        """Regression: disabled_toolsets must not erase the minimal Blank Slate
+        surface when passed to model_tools.  Before the fix, posture toolsets
+        like ``coding`` in disabled_toolsets caused model_tools to subtract
+        terminal, read_file, write_file, etc. (#57315).
+        """
+        import model_tools
+        from hermes_cli.tools_config import _get_platform_tools
+        cfg = {}
+        _blank_slate_minimal_toolsets(cfg)
+        _blank_slate_minimize_config(cfg)
+        enabled = sorted(_get_platform_tools(cfg, "cli"))
+        disabled = cfg.get("agent", {}).get("disabled_toolsets") or []
+        defs = model_tools.get_tool_definitions(
+            enabled_toolsets=enabled,
+            disabled_toolsets=disabled,
+            quiet_mode=True,
+        )
+        names = sorted(
+            {(d.get("function") or {}).get("name") or d.get("name") for d in defs}
+        )
+        assert names == ["patch", "process", "read_file", "search_files",
+                         "terminal", "write_file"]
+
 
 class TestBlankSlateMinimizeConfig:
     def test_optional_features_turned_off(self):