TypeScript Evaluation

When you need to test a TypeScript snippet before persisting it as a managed skill, use bash directly.

Workflow

1. Write the snippet to a temp file

bash command="mkdir -p /tmp/vellum-eval && cat > /tmp/vellum-eval/snippet.ts << 'SNIPPET_EOF'
<your code here>
SNIPPET_EOF"

2. Run it with bun

bash command="bun run /tmp/vellum-eval/snippet.ts" timeout_seconds=10

3. For function-based testing

If the snippet exports a default or run function, write a runner script:

bash command="cat > /tmp/vellum-eval/runner.ts << 'RUNNER_EOF'
import * as mod from './snippet.ts';
const fn = (mod as any).default ?? (mod as any).run;
const input = {}; // mock input
const result = await fn(input);
console.log(JSON.stringify(result, null, 2));
RUNNER_EOF"

Then run the runner:

bash command="bun run /tmp/vellum-eval/runner.ts" timeout_seconds=10

4. Clean up

bash command="rm -rf /tmp/vellum-eval/"

Guidelines

• Iteration limit: Max 3 attempts before asking the user for guidance.
• After successful test: Persist with scaffold_managed_skill only after explicit user consent.
• Timeout: Use timeout_seconds=10 (or up to 20 for complex snippets).
• Error handling: Read stdout/stderr from the bash output to diagnose failures.
• Never persist or delete skills without explicit user confirmation.