Add skill enable controls and data factory SQL skill

src/bundled_skills.py

@@ -20,6 +20,11 @@ if TYPE_CHECKING:
     from .agent_runtime import LocalCodingAgent
 
 
+ALWAYS_ENABLED_HIDDEN_SKILL_NAMES = frozenset(
+    {'update-config', 'verify', 'simplify', 'debug'}
+)
+
+
 @dataclass(frozen=True)
 class BundledSkill:
     """A bundled skill definition."""
@@ -265,6 +270,7 @@ def find_bundled_skill(name: str, cwd: Path | str | None = None) -> BundledSkill
 def format_skills_for_system_prompt(
     max_chars: int = 8000,
     cwd: Path | str | None = None,
+    enabled_skill_names: tuple[str, ...] | set[str] | None = None,
 ) -> str:
     """Format bundled skills for inclusion in system-reminder messages.
 
@@ -272,10 +278,17 @@ def format_skills_for_system_prompt(
     """
     lines = ['Available skills (invoke via Skill tool):']
     char_count = len(lines[0])
+    enabled_names = (
+        {name.strip().lower() for name in enabled_skill_names if name.strip()}
+        if enabled_skill_names is not None
+        else None
+    )
 
     for skill in get_bundled_skills(cwd):
         if not skill.user_invocable:
             continue
+        if enabled_names is not None and skill.name.lower() not in enabled_names:
+            continue
         entry = f'- {skill.name}: {skill.description}'
         if skill.when_to_use:
             entry += f' When to use: {skill.when_to_use}'