Load constitution context in /speckit.implement to enforce governance during implementation (#2460)

* Initial plan

* fix implement command to load constitution context

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Co-authored-by: mnriem <15701806+mnriem@users.noreply.github.com>

* Potential fix for pull request finding

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: mnriem <15701806+mnriem@users.noreply.github.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

templates/commands/implement.md

@@ -88,6 +88,7 @@ You **MUST** consider the user input before proceeding (if not empty).
    - **IF EXISTS**: Read data-model.md for entities and relationships
    - **IF EXISTS**: Read contracts/ for API specifications and test requirements
    - **IF EXISTS**: Read research.md for technical decisions and constraints
+   - **IF EXISTS**: Read /memory/constitution.md for governance constraints
    - **IF EXISTS**: Read quickstart.md for integration scenarios
 
 4. **Project Setup Verification**:

tests/integrations/test_integration_generic.py

@@ -185,6 +185,16 @@ class TestGenericIntegration:
         )
         assert "__CONTEXT_FILE__" not in content
 
+    def test_implement_loads_constitution_context(self, tmp_path):
+        """The generated implement command should load constitution governance context."""
+        i = get_integration("generic")
+        m = IntegrationManifest("generic", tmp_path)
+        i.setup(tmp_path, m, parsed_options={"commands_dir": ".custom/cmds"})
+        implement_file = tmp_path / ".custom" / "cmds" / "speckit.implement.md"
+        assert implement_file.exists()
+        content = implement_file.read_text(encoding="utf-8")
+        assert ".specify/memory/constitution.md" in content
+
     # -- CLI --------------------------------------------------------------
 
     def test_cli_generic_without_commands_dir_fails(self, tmp_path):