Run fixed Zopu worktrees with Pi

packages/backend/convex/workExecutionAgent.ts

@@ -81,7 +81,7 @@ export const cancelAttempt = internalAction({
   handler: async (_ctx, args) => {
     // The workspace key remains the URL path segment (workspace identity),
     // while the body carries the attemptId so the runtime can target the
-    // codex session `codex-${attemptId}` for cancellation.
+    // matching Pi ACP session for cancellation.
     await fetch(
       `${backendUrl()}/internal/work-attempts/${encodeURIComponent(args.workspaceKey)}/cancel`,
       {

packages/backend/convex/workExecutionWorkflow.ts

@@ -430,7 +430,7 @@ export const completeAttempt = internalMutation({
       kind: "diff",
       metadataJson: JSON.stringify({ changedFiles: args.result.changedFiles }),
       organizationId: work.organizationId,
-      producer: "agentos-codex",
+      producer: "agentos-pi",
       projectId: work.projectId,
       provenanceJson: JSON.stringify({
         baseRevision: args.result.baseRevision,