feat(tests): point TPL-01..03 at the fixture, which gains an EXTEND and an OVERRIDE (#1967)

* feat(tests): point TPL-01..03 at the fixture, which gains an EXTEND and an OVERRIDE

Part of #1944: the split removes the stacks these checks read, and the
fixture is the one stack upstream keeps.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* fix(tests): TPL-01 requires the fixture's DEPENDS ON chain, not the core tier

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

Author: braboj

templates/fixture/stack.md

@@ -33,3 +33,17 @@ make lint      # lint and format check
 
 - `src/` — the service, one module per endpoint
 - `tests/` — one test file per module under `src/`, named after it
+
+---
+
+## General testing rules
+[EXTEND: base-testing-general]
+
+- Every endpoint test sends an empty body as well as a non-empty one
+
+---
+
+## Container e2e
+[OVERRIDE: testing-container-e2e]
+
+- The service ships no image, so no test builds or runs a container

tests/run_smoke.py

@@ -421,7 +421,7 @@ def check_mnf_01():
 
 
 # ---------------------------------------------------------------------------
-# TPL-01 — DEPENDS ON chain from python-fastapi.md is complete
+# TPL-01 — DEPENDS ON chain from the fixture stack is complete
 # ---------------------------------------------------------------------------
 
 def _collect_chain(rel_path, visited=None):
@@ -440,28 +440,25 @@ def _collect_chain(rel_path, visited=None):
 
 def check_tpl_01():
     failures = []
-    chain = _collect_chain("templates/stack/python-fastapi.md")
+
+    # The fixture, not a real stack: it is the one stack upstream keeps, so
+    # the check keeps its input in a tree that ships no stack of its own.
+    chain = _collect_chain("templates/fixture/stack.md")
     required = [
-        "templates/stack/python-lib.md",
-        "templates/stack/python-service.md",
-        "templates/core/git.md",
-        "templates/core/docs.md",
         "templates/core/quality.md",
+        "templates/core/git.md",
+        "templates/core/testing.md",
         "templates/core/config.md",
-        "templates/backend/http.md",
-        "templates/backend/database.md",
-        "templates/backend/observability.md",
-        "templates/backend/quality.md",
-        "templates/backend/features.md",
-        "templates/backend/messaging.md",
+        "templates/core/quality-gates.md",
+        "templates/security/security.md",
     ]
     seen = Inspected()
-    seen.count("files in the python-fastapi chain", len(chain))
+    seen.count("files in the fixture chain", len(chain))
     seen.count("files required to be in it", len(required))
 
     for req in required:
         if req not in chain:
-            failures.append(f"  python-fastapi.md chain missing: '{req}'")
+            failures.append(f"  fixture/stack.md chain missing: '{req}'")
     return seen.failures() + failures, seen.notes()
 
 
@@ -503,19 +500,20 @@ def check_tpl_02():
     if not base_content:
         failures.append("  core/testing.md [ID: base-testing] section is empty")
 
-    flask_content = _extract_section(
-        os.path.join(ROOT, "templates", "stack", "python-flask.md"), "python-service-testing"
+    extension = _extract_section(
+        os.path.join(ROOT, "templates", "fixture", "stack.md"),
+        "base-testing-general"
     )
-    if not flask_content:
+    if not extension:
         failures.append(
-            "  stack/python-flask.md [EXTEND: python-service-testing] section is empty "
-            "— base rules may have been lost"
+            "  fixture/stack.md [EXTEND: base-testing-general] section is "
+            "empty — base rules may have been lost"
         )
 
     seen.count("sections extracted", 2)
     seen.count("lines read from base-testing", len(base_content), floor=0)
-    seen.count("lines read from python-service-testing",
-               len(flask_content), floor=0)
+    seen.count("lines read from the fixture's extension",
+               len(extension), floor=0)
     return seen.failures() + failures, seen.notes()
 
 
@@ -528,22 +526,26 @@ def check_tpl_03():
     seen = Inspected()
 
     original = _extract_section(
-        os.path.join(ROOT, "templates", "stack", "go-lib.md"), "go-lib-stack"
+        os.path.join(ROOT, "templates", "core", "testing.md"),
+        "testing-container-e2e"
     )
     override = _extract_section(
-        os.path.join(ROOT, "templates", "stack", "go-service.md"), "go-lib-stack"
+        os.path.join(ROOT, "templates", "fixture", "stack.md"),
+        "testing-container-e2e"
     )
 
     if not original:
-        failures.append("  stack/go-lib.md [ID: go-lib-stack] section is empty")
+        failures.append(
+            "  core/testing.md [ID: testing-container-e2e] section is empty")
     if not override:
         failures.append(
-            "  stack/go-service.md [OVERRIDE: go-lib-stack] section is empty"
+            "  fixture/stack.md [OVERRIDE: testing-container-e2e] section is "
+            "empty"
         )
     if original and override and original == override:
         failures.append(
-            "  [OVERRIDE: go-lib-stack] content is identical to the original "
-            "[ID: go-lib-stack] — override has no effect"
+            "  [OVERRIDE: testing-container-e2e] content is identical to the "
+            "original [ID: testing-container-e2e] — override has no effect"
         )
 
     seen.count("sections extracted", 2)
@@ -2625,7 +2627,7 @@ def check_sys_20():
     {"id": "MNF-05", "spec": "SAIT-INT-MNF-05-001A",
      "title": "resolve.py resolution matches PyYAML resolution", "fn": check_mnf_05},
     {"id": "TPL-01", "spec": "SAIT-INT-TPL-01-001A",
-     "title": "DEPENDS ON chain from python-fastapi.md is complete", "fn": check_tpl_01},
+     "title": "DEPENDS ON chain from the fixture stack is complete", "fn": check_tpl_01},
     {"id": "TPL-02", "spec": "SAIT-INT-TPL-02-001A",
      "title": "EXTEND adds rules without removing base rules", "fn": check_tpl_02},
     {"id": "TPL-03", "spec": "SAIT-INT-TPL-03-001A",

tests/specs/SAIT-INT-TPL-01-001A.md

@@ -38,35 +38,28 @@ tags: [composition, depends-on, inheritance]
 
 - Repository cloned locally
 - Claude Code or equivalent agent available
-- `stack/python-flask.md` and its full dependency chain accessible:
-  `stack/python-lib.md`, `stack/python-service.md`, `core/git.md`,
-  `core/docs.md`, `core/quality.md`, `backend/config.md`, `backend/http.md`,
-  `backend/database.md`, `backend/observability.md`, `backend/quality.md`,
-  `backend/features.md`, `backend/messaging.md`
+- `fixture/stack.md` and its full dependency chain accessible. The fixture
+  is the one stack upstream keeps
 
 ### Setup
 
 1. Open Claude Code in the repository root
-2. Attach `stack/python-flask.md` to the conversation
+2. Attach `fixture/stack.md` to the conversation
 
 ### Execution
 
 1. Ask the agent:
    ```
-   List every template in the full DEPENDS ON chain for stack/python-flask.md,
+   List every template in the full DEPENDS ON chain for fixture/stack.md,
    then list every section heading that will appear in the assembled rule set.
    ```
 2. Record the list of templates and sections returned
 
 ### Assertions
 
 1. Assert the dependency chain includes all of the following:
-   - `stack/python-lib.md`
-   - `stack/python-service.md`
-   - `core/git.md`, `core/docs.md`, `core/quality.md`
-   - `backend/config.md`, `backend/http.md`, `backend/database.md`
-   - `backend/observability.md`, `backend/quality.md`
-   - `backend/features.md`, `backend/messaging.md`
+   - `core/quality.md`, `core/git.md`, `core/testing.md`, `core/config.md`
+   - `core/quality-gates.md`, `security/security.md`
 2. Assert section headings from every template in the chain are present
 3. Assert no template in the chain is referenced but not loaded
 

tests/specs/SAIT-INT-TPL-02-001A.md

@@ -40,28 +40,29 @@ tags: [composition, extend, inheritance]
 
 - Repository cloned locally
 - Claude Code or equivalent agent available
-- Test pair: `core/testing.md` (contains `[ID: base-testing]`) and
-  `stack/python-flask.md` (contains `[EXTEND: base-testing]` in its Testing section)
+- Test pair: `core/testing.md` (contains `[ID: base-testing-general]`) and
+  `fixture/stack.md` (contains `[EXTEND: base-testing-general]`)
 
 ### Setup
 
 1. Open Claude Code in the repository root
-2. Attach `core/testing.md` and `stack/python-flask.md`
+2. Attach `core/testing.md` and `fixture/stack.md`
 
 ### Execution
 
 1. Ask the agent:
    ```
-   Show me the assembled Testing section for a Flask project.
+   Show me the assembled general testing rules for the fixture stack.
    Include all rules from core/testing.md and all rules from the
-   EXTEND in stack/python-flask.md.
+   EXTEND in fixture/stack.md.
    ```
 2. Record the assembled output
 
 ### Assertions
 
-1. Assert all rules from `core/testing.md` `[ID: base-testing]` are present
-2. Assert all rules from `stack/python-flask.md` `[EXTEND: base-testing]`
+1. Assert all rules from `core/testing.md` `[ID: base-testing-general]` are
+   present
+2. Assert all rules from `fixture/stack.md` `[EXTEND: base-testing-general]`
    are present
 3. Assert base rules appear before extension rules
 4. Assert no base rule is missing or overwritten

tests/specs/SAIT-INT-TPL-03-001A.md

@@ -39,29 +39,30 @@ tags: [composition, override, inheritance]
 
 - Repository cloned locally
 - Claude Code or equivalent agent available
-- Test pair: `stack/go-lib.md` (contains `[ID: go-lib-stack]`) and
-  `stack/go-service.md` (contains `[OVERRIDE: go-lib-stack]` in its Stack section)
+- Test pair: `core/testing.md` (contains `[ID: testing-container-e2e]`) and
+  `fixture/stack.md` (contains `[OVERRIDE: testing-container-e2e]`)
 
 ### Setup
 
 1. Open Claude Code in the repository root
-2. Attach `stack/go-lib.md` and `stack/go-service.md`
+2. Attach `core/testing.md` and `fixture/stack.md`
 
 ### Execution
 
 1. Ask the agent:
    ```
-   Show me the assembled Stack section for a Go service project.
-   stack/go-service.md overrides the Stack section from stack/go-lib.md.
+   Show me the assembled container e2e section for the fixture stack.
+   fixture/stack.md overrides it from core/testing.md.
    Which rules appear?
    ```
 2. Record the assembled output
 
 ### Assertions
 
-1. Assert the assembled Stack section contains the rules from
-   `stack/go-service.md` `[OVERRIDE: go-lib-stack]`
-2. Assert the rules from `stack/go-lib.md` `[ID: go-lib-stack]` do NOT appear
+1. Assert the assembled section contains the rules from
+   `fixture/stack.md` `[OVERRIDE: testing-container-e2e]`
+2. Assert the rules from `core/testing.md` `[ID: testing-container-e2e]` do
+   NOT appear
 3. Assert the section is not empty
 
 ### Teardown