Add BDD test coverage for spec clarifications regarding:
- Application layer DI exception (container.py)
- ULID identifier scope (domain vs internal IDs)
- ACMS pipeline protocol contracts
- TUI component public interfaces

ISSUES CLOSED: #10451

@@ -0,0 +42,4 @@
+
+
+def _SRC_DIR():
+    return _repo_root() / "src" / "cleveragents"

@@ -0,0 +46,4 @@
+
+# The spec file path
+def _SPEC_PATH():
+    return _repo_root() / "docs" / "specification.md"

@@ -0,0 +281,4 @@
+@then(
+    "the {model} model should have a field typed as a ULID string",
+)
+def step_model_has_ulid_field(context):

@@ -0,0 +296,4 @@
+
+
+@then(
+    "the {model} model should have a parent_plan_id field typed as a nullable ULID",

@@ -0,0 +386,4 @@
+    ulid_count = len(re.findall(r"\bULID\b", spec_text))
+    assert ulid_count >= 10, (
+        f"Spec {spec_text.parent / 'specification.md'} contains only {ulid_count} ULID references. "
+        f"Domain entity ID clarification should have many more."

@@ -0,0 +625,4 @@
+@then(
+    "{model} should support InputMode enum values for mode-dependent symbol rendering",
+)
+def step_prompt_input_modes(context):

@@ -0,0 +640,4 @@
+@then(
+    "{model} should emit a {event_type} event on submission",
+)
+def step_prompt_input_emits_event(context):

@@ -0,0 +674,4 @@
+@then(
+    "{model} should have a {method} method for updating display text",
+)
+def step_widget_has_set_content_method(context):

@@ -0,0 +725,4 @@
+            break
+
+
+@given("the TUI app module imports widgets")

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+
+  @di_exception @layer_boundary
+  Scenario: container.py imports from domain models and infrastructure simultaneously
+    Given the file "src/cleveragents/application/container.py" is readable

@@ -0,0 +46,4 @@
+  @ulid_scope @spec_clarification_10451
+  Scenario: Domain entity Plan uses ULID for plan_id field
+    When I verify the domain model for "Plan" at cleveragents.domain.models.core.plan
+    Then the plan model should have a plan_id field typed as a ULID string (26 chars, Crockford alphabet)

@@ -0,0 +109,4 @@
+  @acms_protocol @per_stage_contract
+  Scenario: BudgetPacker enforces token budget limit (storage tier definition)
+    Given the ACMS pipeline modules are available
+    When I assemble with strategy "tiered" and budget 200 tokens from hot + warm tier fragments