feat(skills): enhance agent skills with additional tags and commands

- Added language_tags, library_tags, framework_tags, and domain_tags to agent skills.
- Introduced new commands: get_skill and get_guardrail for fetching specific skills and guardrails.
- Updated database schema and migration scripts to accommodate new fields.
- Enhanced skill listing functionality to support filtering by new tags.
- Improved error handling and response structures for skill-related operations.

migrations/020_generated_schema.sql

@@ -277,8 +277,12 @@ CREATE TABLE IF NOT EXISTS public.agent_skills (
   content text NOT NULL,
   created_at timestamptz NOT NULL DEFAULT now(),
   description text NOT NULL DEFAULT '',
+  domain_tags text[] NOT NULL DEFAULT '{}',
+  framework_tags text[] NOT NULL DEFAULT '{}',
   guid uuid NOT NULL DEFAULT gen_random_uuid(),
   id bigserial NOT NULL,
+  language_tags text[] NOT NULL DEFAULT '{}',
+  library_tags text[] NOT NULL DEFAULT '{}',
   name text NOT NULL,
   tags text[] NOT NULL DEFAULT '{}',
   updated_at timestamptz NOT NULL DEFAULT now()
@@ -1793,6 +1797,32 @@ BEGIN
 END;
 $$;
 
+DO $$
+BEGIN
+  IF NOT EXISTS (
+    SELECT 1 FROM information_schema.columns
+    WHERE table_schema = 'public'
+      AND table_name = 'agent_skills'
+      AND column_name = 'domain_tags'
+  ) THEN
+    ALTER TABLE public.agent_skills ADD COLUMN domain_tags text[] NOT NULL DEFAULT '{}';
+  END IF;
+END;
+$$;
+
+DO $$
+BEGIN
+  IF NOT EXISTS (
+    SELECT 1 FROM information_schema.columns
+    WHERE table_schema = 'public'
+      AND table_name = 'agent_skills'
+      AND column_name = 'framework_tags'
+  ) THEN
+    ALTER TABLE public.agent_skills ADD COLUMN framework_tags text[] NOT NULL DEFAULT '{}';
+  END IF;
+END;
+$$;
+
 DO $$
 BEGIN
   IF NOT EXISTS (
@@ -1819,6 +1849,32 @@ BEGIN
 END;
 $$;
 
+DO $$
+BEGIN
+  IF NOT EXISTS (
+    SELECT 1 FROM information_schema.columns
+    WHERE table_schema = 'public'
+      AND table_name = 'agent_skills'
+      AND column_name = 'language_tags'
+  ) THEN
+    ALTER TABLE public.agent_skills ADD COLUMN language_tags text[] NOT NULL DEFAULT '{}';
+  END IF;
+END;
+$$;
+
+DO $$
+BEGIN
+  IF NOT EXISTS (
+    SELECT 1 FROM information_schema.columns
+    WHERE table_schema = 'public'
+      AND table_name = 'agent_skills'
+      AND column_name = 'library_tags'
+  ) THEN
+    ALTER TABLE public.agent_skills ADD COLUMN library_tags text[] NOT NULL DEFAULT '{}';
+  END IF;
+END;
+$$;
+
 DO $$
 BEGIN
   IF NOT EXISTS (