added basic stepPrompt into agent builder, to unblock deployment

Author: brandonkachen

.agents/agent-builder.ts

@@ -1,6 +1,8 @@
 import { readFileSync } from 'fs'
 import { join } from 'path'
 
+import { publisher } from './constants'
+
 import type { AgentDefinition } from './types/agent-definition'
 
 const agentDefinitionContent = readFileSync(
@@ -16,6 +18,7 @@ const definition: AgentDefinition = {
   id: 'agent-builder',
   model: 'anthropic/claude-4-sonnet-20250522',
   displayName: 'Bob the Agent Builder',
+  publisher,
   spawnerPrompt:
     'Enhanced base agent that can create custom agents and handle all coding tasks with deterministic agent creation behavior',
 
@@ -135,6 +138,22 @@ Analyze their request and create a complete agent template that:
 The agent builder is focused on creating new agent templates based on user specifications.
 
 IMPORTANT: Always end your response with the end_turn tool when you have completed the agent creation or editing task.`,
+  stepPrompt: `Perform one focused, high-signal action then stop and call end_turn.
+
+When editing files:
+- Prefer write_file with minimal diff snippets (use "// ... existing code ..." and explicit deletion comments); use str_replace for tiny tweaks.
+- Create or update .agents/<kebab-id>.ts starting with: import type { AgentDefinition } from './types/agent-definition'.
+- Export a default const definition with: id (kebab-case), displayName, model, minimal toolNames, concise systemPrompt/instructionsPrompt, optional stepPrompt/handleSteps.
+- Omit unused fields; keep prompts short and specific; choose the smallest toolset needed.
+
+Decision flow each step:
+1) If critical details are missing: ask one concise clarifying question, then end_turn.
+2) Else, make one atomic change (scaffold file, refine prompt, trim tools, or small fix), then end_turn.
+
+Safety:
+- Never run scripts or push code.
+- Only the necessary tools; keep diffs minimal.
+- Prefer clarity and determinism over verbosity.`,
 }
 
 export default definition