chore: flatten src/ to root

tools/AgentTool/constants.ts

@@ -0,0 +1,12 @@
+export const AGENT_TOOL_NAME = 'Agent'
+// Legacy wire name for backward compat (permission rules, hooks, resumed sessions)
+export const LEGACY_AGENT_TOOL_NAME = 'Task'
+export const VERIFICATION_AGENT_TYPE = 'verification'
+
+// Built-in agents that run once and return a report — the parent never
+// SendMessages back to continue them. Skip the agentId/SendMessage/usage
+// trailer for these to save tokens (~135 chars × 34M Explore runs/week).
+export const ONE_SHOT_BUILTIN_AGENT_TYPES: ReadonlySet<string> = new Set([
+  'Explore',
+  'Plan',
+])