Add activity-core scope context API

src/repo_registry/web_api/schemas.py

@@ -862,6 +862,51 @@ class RepositoryAbilityMapResponse(BaseModel):
     }
 
 
+class RepositoryScopeContextResponse(BaseModel):
+    repo_slug: str = Field(
+        description="Slug requested by the caller after normal slugification."
+    )
+    capabilities: list[str] = Field(
+        description="Approved capability names from the repository ability map."
+    )
+    tags: list[str] = Field(
+        description=(
+            "Sorted union of approved ability and capability primary classes "
+            "plus their attributes."
+        )
+    )
+    scope_md_exists: bool = Field(
+        description=(
+            "True when repo-scoping can inspect a local or cached checkout and "
+            "root SCOPE.md exists."
+        )
+    )
+    scope_summary: str | None = Field(
+        description=(
+            "First non-empty paragraph of root SCOPE.md when available, "
+            "otherwise registry metadata."
+        )
+    )
+
+    model_config = {
+        "extra": "forbid",
+        "json_schema_extra": {
+            "examples": [
+                {
+                    "repo_slug": "repo-scoping",
+                    "capabilities": ["Generate SCOPE.md"],
+                    "tags": ["api", "generation", "scope"],
+                    "scope_md_exists": True,
+                    "scope_summary": (
+                        "Repository Scoping maps repositories into reviewable "
+                        "scope graphs."
+                    ),
+                }
+            ]
+        },
+    }
+
+
 class IdResponse(BaseModel):
     id: int