Run workflow stages with finish_stage handoffs and lead signals

web/src/api.gen.ts

@@ -923,11 +923,7 @@ export interface components {
         Stage: {
             /** @description One line of 1 to 100 characters, unique within the workflow. */
             name: string;
-            /**
-             * @description Must be the vendor that runs model (gpt-* models run on Codex, every other model on Claude Code).
-             * @enum {string}
-             */
-            vendor: "claude" | "codex";
+            /** @description The stage agent's model, which also picks its vendor: gpt-* models run on Codex, every other model on Claude Code. */
             model: string;
             /** @description The stage agent's instructions. */
             prompt: string;
@@ -1076,6 +1072,8 @@ export interface components {
             forked_from?: string;
             /** @description With forked_from: the vendor's id of the last thing the fork keeps, a message for Claude Code, a turn for Codex. */
             forked_at?: string;
+            /** @description The stage (from 1) of the task's workflow this session runs; absent for a session outside a workflow. */
+            workflow_stage?: number;
         };
         SessionCreate: {
             prompt: string;