fix(bash): classify signal-terminated background processes

packages/bash/bash-local/src/index.ts

@@ -175,10 +175,12 @@ export class LocalBashExecutor extends BashExecutor {
       exitCode: null,
       signal: null,
       done: running.done.then((outcome) => {
-        // Abort-killed processes report as killed, not completed. Background
-        // runs forward only the upstream signal (no timeout), so its aborted
-        // state is the authoritative "was this cancelled" signal.
-        if (proc.status === 'running') proc.status = spec.signal?.aborted === true ? 'killed' : 'completed'
+        // Caller-aborted and signal-terminated processes report as killed, not
+        // completed. The signal check also covers commands that terminate
+        // themselves without aborting the upstream signal.
+        if (proc.status === 'running') {
+          proc.status = spec.signal?.aborted === true || outcome.signal !== null ? 'killed' : 'completed'
+        }
         proc.exitCode = outcome.exitCode
         proc.signal = outcome.signal
         this.live.delete(proc)

packages/bash/bash-local/tests/executor.spec.ts

@@ -249,6 +249,15 @@ describe('LocalBashExecutor.start (background process handles)', () => {
     expect(proc.signal).toBe('SIGTERM')
   })
 
+  it('a self-signal exit settles the handle as killed, not completed', async () => {
+    const { bash } = await setup()
+    const proc = bash.start(bash.resolve({ command: 'kill -TERM $$' }))
+    await proc.done
+    expect(proc.status).toBe('killed')
+    expect(proc.exitCode).toBeNull()
+    expect(proc.signal).toBe('SIGTERM')
+  })
+
   it('a background spawn failure settles as killed with the error readable on stderr', async () => {
     const { bash } = await setup()
     const proc = bash.start(bash.resolve({ command: 'true', workdir: '/nonexistent-dsh' }))

packages/bash/tool-bash/tests/tools.spec.ts

@@ -288,6 +288,14 @@ describe('background execution through the task runtime', () => {
     expect(text(final)).toContain('[status: killed, signal: SIGTERM]')
   })
 
+  it('a self-signal background exit is reported as killed through the REAL task_output tool', async () => {
+    const ctx = await setupWithTasks()
+    await call(ctx, 'bash', { command: 'kill -TERM $$', description: 'test command', run_in_background: true })
+
+    const final = await call(ctx, 'task_output', { task_id: 'bash-1', wait: true })
+    expect(text(final)).toContain('[status: killed, signal: SIGTERM]')
+  })
+
   it('a background task started by an agent is registered with that agent as owner', async () => {
     // The fence SEMANTICS are pinned in dsh-tasks; this only pins that
     // tool-bash forwards exec.agent as the registration's owner.