feat: add canonical typed tool outputs

packages/workflow/tool-workflow/tests/tool-workflow.spec.ts

@@ -79,8 +79,10 @@ describe('dsh-tool-workflow', () => {
     engine.settle({ value: { findings: [1, 2] }, stopReason: 'completed', agentsStarted: 7 })
     const result = await pending
     expect(result.isError).toBe(false)
+    if (result.isError) throw new Error('expected workflow success')
+    expect(result.value).toEqual({ runId: 'run-1', agentsStarted: 7, result: { findings: [1, 2] } })
     const rendered = (result.content[0] as { text: string }).text
-    expect(rendered).toContain('workflow "stub-flow" completed (7 agents)')
+    expect(rendered).toContain('workflow "audit" completed (7 agents)')
     expect(rendered).toContain('"findings"')
     expect(engine.disposed).toBe(1)
   })
@@ -151,7 +153,7 @@ describe('dsh-tool-workflow', () => {
     const { ctx, parent } = await setup()
     const result = await execute(ctx, {}, { agent: parent })
     expect(result.isError).toBe(true)
-    expect(result.error?.code).toBe('INVALID_ARGS')
+    expect(result.error?.info?.code).toBe('INVALID_ARGS')
   })
 
   it('cancels the run when exec.signal is ALREADY aborted at call time', async () => {
@@ -169,7 +171,10 @@ describe('dsh-tool-workflow', () => {
     const pending = execute(ctx, { script: SCRIPT, meta: META }, { agent: parent })
     await vi.waitFor(() => { expect(engine.requests.length).toBe(1) })
     engine.settle({ value: { blob: 'x'.repeat(500) }, stopReason: 'completed', agentsStarted: 1 })
-    const rendered = ((await pending).content[0] as { text: string }).text
+    const result = await pending
+    if (result.isError) throw new Error('expected workflow success')
+    expect(result.value).toEqual({ runId: 'run-1', agentsStarted: 1, result: { blob: 'x'.repeat(500) } })
+    const rendered = (result.content[0] as { text: string }).text
     expect(rendered).toContain('[truncated:')
     expect(rendered.length).toBeLessThan(400)
   })