export function coderPrompt({ threadId }: { threadId: string }): string {
  return `Read the workflow thread to get the planner's design and any tester feedback: \`nerve thread ${threadId}\`
Read the nerve-dev skill for workflow file structure and conventions: \`cat node_modules/@uncaged/nerve-skills/nerve-dev/SKILL.md\`
Also look at existing workflows in the \`workflows/\` directory for patterns.

Implement the workflow the planner designed. If there is tester feedback in the thread, fix the issues it identified.

Required files for each workflow:
- \`workflows/<name>/index.ts\` — WorkflowDefinition default export
- \`workflows/<name>/package.json\` — with esbuild build script
- \`workflows/<name>/tsconfig.json\` — TypeScript config
- Update \`nerve.yaml\` with \`workflows.<name>\`

Rules:
- Keep the WorkflowDefinition<WorkflowMeta> pattern
- No dynamic import()
- Use types (not interfaces)
- Include retry-aware moderator routing
- Write compile-ready TypeScript

After creating all files, run inside the workflow directory:
\`\`\`
pnpm install --no-cache && pnpm build
\`\`\`

End your response with a JSON block:
\`\`\`json
{ "done": true }
\`\`\`
if build succeeded, or:
\`\`\`json
{ "done": false }
\`\`\`
if there were errors.`;
}