add-invokta-capability

Add an Invokta Capability

Resolve the project root as three directories above this SKILL.md. Perform all relative reads and commands from that root; do not assume the caller's current working directory is the project.

Establish the contract

1. Read AGENTS.md, CUSTOMIZE.md, src/engine.ts, src/capabilities/template.ts, and test/engine.test.ts completely.
2. Define the stable capability ID, title, description, input, output, access, timeout, annotations, dependency failures, and observable errors.
3. Ask for an explicit decision before changing an existing ID, schema, access rule, or output contract.

Follow RED, GREEN, REFACTOR

1. Add an engine-level test that invokes the literal capability ID through engine.invoke and fails for the missing behavior.
2. Cover unauthenticated access and invalid input. Cover ownership, not-found, cancellation, or dependency failure when the capability can encounter it.
3. Implement the smallest capability and dependency boundary that passes.
4. Refactor only after the contract is executable.

Keep one engine boundary

• Define the action with defineCapability and Zod input/output schemas.
• Use access: "authenticated" for user or tenant data unless the user explicitly approves a public contract.
• Treat context.principal.id as the ownership boundary for per-user data.
• Inject repositories, providers, clocks, and tools through engine-owned factories or closures.
• Register the literal ID in src/engine.ts and invokta.mcp.json.
• Keep business logic out of src/direct.ts, src/cli.ts, src/mcp-stdio.ts, and src/mcp-http.ts.
• Never call a capability's run method directly.

Add persistence safely

• Start domain migrations after migrations/001_oauth.sql.
• Use 002_domain.sql for the first domain migration; inspect the existing migration list before choosing every later number.
• Make migrations transactional and safe to rerun.
• Add each migration filename to src/database/migrate.ts.
• Keep every per-user query constrained by the authenticated principal.
• Do not couple domain tables to oauth_artifacts; OAuth persistence is an authorization-server implementation detail.
• Extend the structure that exists in the project. Do not invent repository, domain, schema, or test files before confirming they are present or needed.