feat(boulder-state): add worktree_path field to BoulderState

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/features/boulder-state/storage.ts

@@ -150,7 +150,8 @@ export function getPlanName(planPath: string): string {
 export function createBoulderState(
   planPath: string,
   sessionId: string,
-  agent?: string
+  agent?: string,
+  worktreePath?: string,
 ): BoulderState {
   return {
     active_plan: planPath,
@@ -158,5 +159,6 @@ export function createBoulderState(
     session_ids: [sessionId],
     plan_name: getPlanName(planPath),
     ...(agent !== undefined ? { agent } : {}),
+    ...(worktreePath !== undefined ? { worktree_path: worktreePath } : {}),
   }
 }

src/features/boulder-state/types.ts

@@ -16,6 +16,8 @@ export interface BoulderState {
   plan_name: string
   /** Agent type to use when resuming (e.g., 'atlas') */
   agent?: string
+  /** Absolute path to the git worktree root where work happens */
+  worktree_path?: string
 }
 
 export interface PlanProgress {