feat(tasks): background task runtime, generic task_* control tools, bash/subagent producers

One shared ctx.tasks registry (branded <kind>-N ids, owner-fenced
read/kill/wait/list, attachSurface misconfiguration fence, reported-flag
notice dedup, atomic register) + dsh-tool-tasks (task_output/task_list/
task_kill, completion-notice injection, background prompt habit).
Producers opt in via their own enableRunInBackground config: bash
(stream kind; seam slimmed to resolve/run/start returning a BashProcess
handle, bash_output/bash_kill deleted) and subagent (final-output kind;
done settles after run.dispose()). Owner disposal drains tasks through
the new awaited ctx.agents.onCleanup seam in the loop's disposal chain.
Both RFCs moved to implemented/; docs, catalogs, snapshots re-pinned.
This commit is contained in:
Yichen Jiang
2026-07-09 21:22:54 +08:00
parent e7e382f9d1
commit 184e164091
83 files changed
+3909 -1627

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@@ -7,15 +7,17 @@ import SystemPrompt from '@deepseek-ai/dsh-system-prompt'
import ToolRegistry from '@deepseek-ai/dsh-tools'
import AgentRegistry, { AgentId } from '@deepseek-ai/dsh-agent'
import AgentLoop, { ReactLoopAgent } from '@deepseek-ai/dsh-agent-loop'
import TaskService from '@deepseek-ai/dsh-tasks'
import * as ToolTasks from '@deepseek-ai/dsh-tool-tasks'
import { LocalBashExecutor } from '@deepseek-ai/dsh-bash-local'
import { BashTaskId } from '@deepseek-ai/dsh-bash'
import * as ToolBash from '@deepseek-ai/dsh-tool-bash'
import { MockAdapter, textResponse, toolCallResponse } from '../../../core/agent-loop/tests/mock-adapter.ts'
/**
* Full-loop integration: a scripted mock model drives the REAL bash tool
* through the agent loop, exercising the same seams a live model would
* (tool/call + tool/result session events, agent.inject notifications).
* (tool/call + tool/result session events, the generic `ctx.tasks` runtime,
* agent.inject completion notices).
*/
async function harness(adapter: MockAdapter) {
const ctx = new Context()
@@ -25,6 +27,8 @@ async function harness(adapter: MockAdapter) {
await ctx.plugin(ToolRegistry)
await ctx.plugin(AgentRegistry)
await ctx.plugin(AgentLoop, { agents: [] })
await ctx.plugin(TaskService)
await ctx.plugin(ToolTasks)
await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000 })
await ctx.plugin(ToolBash)
ctx.llm.registerAdapter(['mock'], adapter)
@@ -67,6 +71,16 @@ function resultText(event: SessionEvent): string {
.join('')
}
/** Poll until `predicate` holds (background settlement races turn end). */
async function pollUntil(predicate: () => boolean, timeoutMs = 5_000): Promise<void> {
const deadline = Date.now() + timeoutMs
while (Date.now() < deadline) {
if (predicate()) return
await new Promise(resolve => setTimeout(resolve, 20))
}
throw new Error(`condition not met within ${timeoutMs}ms`)
}
describe('bash tool through the agent loop', () => {
it('foreground: model calls bash, sees the result, replies', async () => {
const adapter = new MockAdapter([
@@ -116,53 +130,41 @@ describe('bash tool through the agent loop', () => {
expect(resultText(toolResult)).toContain('[exit code: 9]')
})
it('background: start → poll → completion notice lands as context/message', async () => {
it('background: start ack → completion notice as context/message → task_output collects it', async () => {
// The task id is deterministic (a fresh TaskService counts per kind from 1),
// so the script can name `bash-1` without threading a generated id.
const adapter = new MockAdapter([
toolCallResponse('call-1', 'bash', { command: 'echo bg-ok', description: 'test command', run_in_background: true }),
toolCallResponse('call-2', 'bash_output', {}, undefined),
textResponse('Started it in the background.'),
toolCallResponse('call-2', 'task_output', { task_id: 'bash-1' }),
textResponse('Background task finished.'),
])
// The second tool call needs the REAL task id from the first result;
// a tools/pre-execute listener rewrites the scripted arguments. (This uses
// the low-level capability to mutate `exec` before dispatch — the
// unadvertised mechanism behind a future first-class input-rewrite decision;
// here it is a test shim to thread the generated id, not a product feature.)
let taskId = ''
const ctx = await harness(adapter)
const agent = ctx.agentLoop.create(AgentId('it-bg'), { model: 'mock' })
// Intercept the first tool result to capture the generated task id, then
// rewrite the second scripted call's arguments to use it.
ctx.on('session/event', (_session, event) => {
if (event.type === 'tool/result' && taskId === '') {
const match = /task (bash-\d+)/.exec(resultText(event))
if (match) taskId = match[1]!
}
})
ctx.on('tools/pre-execute', async (exec, next) => {
if (exec.name === 'bash_output') {
exec.arguments = { task_id: taskId }
}
return next()
})
agent.send([{ type: 'text', text: 'run echo bg-ok in the background' }])
await waitForIdle(ctx, agent)
// Wait for the background task itself (completion may race turn end).
const task = ctx.bash.get(BashTaskId(taskId))
if (!task) throw new Error(`task ${taskId} not registered`)
await task.done
const firstResult = findEvent(events(agent), 'tool/result')
expect(firstResult.data.isError).toBe(false)
expect(resultText(firstResult)).toBe('started background task bash-1')
const log = events(agent)
const firstResult = findEvent(log, 'tool/result')
expect(resultText(firstResult)).toBe(`started background task ${taskId}`)
const notice = findEvent(log, 'context/message')
// The task settles on its own; the tool-tasks notice listener injects a
// durable context/message into the owning agent's session (settlement may
// race turn end, so poll for it).
await pollUntil(() => events(agent).some(event => event.type === 'context/message'))
const notice = findEvent(events(agent), 'context/message')
expect(notice.data.content.some(
block => block.type === 'text' && block.text.includes(`background bash task ${taskId} finished`),
block => block.type === 'text' && block.text.includes('background task bash-1 (bash: echo bg-ok) finished'),
)).toBe(true)
expect(notice.data.source).toEqual({ kind: 'plugin', plugin: 'tool-bash' })
expect(notice.data.source).toEqual({ kind: 'plugin', plugin: 'tool-tasks' })
// The next turn collects the output through the generic task tool.
agent.send([{ type: 'text', text: 'collect it' }])
await waitForIdle(ctx, agent)
const readResult = findEvent(events(agent), 'tool/result', 'last')
expect(readResult.data.isError).toBe(false)
expect(resultText(readResult)).toContain('bg-ok')
expect(resultText(readResult)).toContain('[status: completed, exit code: 0]')
})
})
+281 -434
View File
@@ -1,21 +1,24 @@
import { mkdtempSync } from 'node:fs'
import { tmpdir } from 'node:os'
import { join } from 'node:path'
import { describe, expect, it, vi } from 'vitest'
import { describe, expect, it } from 'vitest'
import { Context } from 'cordis'
import { CallId } from '@deepseek-ai/dsh-llm'
import { BashExecutor, BashTaskId } from '@deepseek-ai/dsh-bash'
import type { BashExecRequest, BashExecSpec, BashRunResult, BashTask, BashTaskRead, OwnerToken } from '@deepseek-ai/dsh-bash'
import { BashExecutor } from '@deepseek-ai/dsh-bash'
import type { BashExecRequest, BashExecSpec, BashProcess, BashProcessRead, BashRunResult } from '@deepseek-ai/dsh-bash'
import SystemPrompt from '@deepseek-ai/dsh-system-prompt'
import ToolRegistry from '@deepseek-ai/dsh-tools'
import AgentRegistry from '@deepseek-ai/dsh-agent'
import type { Agent } from '@deepseek-ai/dsh-agent'
import TaskService from '@deepseek-ai/dsh-tasks'
import * as ToolTasks from '@deepseek-ai/dsh-tool-tasks'
import { LocalBashExecutor } from '@deepseek-ai/dsh-bash-local'
import * as ToolBash from '@deepseek-ai/dsh-tool-bash'
import { renderResult } from '@deepseek-ai/dsh-tool-bash'
import { processOutcome, renderProcessRead, renderResult } from '@deepseek-ai/dsh-tool-bash'
const spillDir = mkdtempSync(join(tmpdir(), 'dsh-tool-bash-spec-'))
/** Foreground-only harness: no task runtime (backgrounding fails loud here). */
async function setup() {
const ctx = new Context()
await ctx.plugin(SystemPrompt)
@@ -27,39 +30,36 @@ async function setup() {
return ctx
}
/** Full harness: the generic task runtime + its control surface, then the bash tool. */
async function setupWithTasks() {
const ctx = new Context()
await ctx.plugin(SystemPrompt)
await ctx.plugin(ToolRegistry)
await ctx.plugin(AgentRegistry)
await ctx.plugin(TaskService)
await ctx.plugin(ToolTasks)
await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000, graceMs: 200 })
;(ctx.bash as LocalBashExecutor).internals = { spillDir }
await ctx.plugin(ToolBash)
return ctx
}
/**
* Build a fake {@link Agent} whose session token is `sessionId`, REGISTER it in
* `ctx.agents` (the completion-notice path finds the owning agent by scanning
* the registry for a matching `session.header.id`), and return it. The returned
* agent is also passed to `execute` as `exec.agent` so it owns the spawned task.
* The registration disposer is tracked so {@link unregisterFakeAgents} can drop
* it (simulating the owning session disconnecting before a task completes).
* Build a fake {@link Agent} whose session token is `sessionId` and REGISTER it
* in `ctx.agents` (an owned task registration attaches the awaited owner
* cleanup via `ctx.agents.onCleanup`, which requires a live registered agent).
* The agent id is deliberately DIFFERENT from the session token so a
* wrong-field match fails the test.
*/
const fakeAgentDisposers = new Map<Context, (() => void)[]>()
function registerFakeAgent(ctx: Context, sessionId: string, inject: (...args: unknown[]) => void): Agent {
// The registry KEY (agent.id) is deliberately DIFFERENT from the session
// token (session.header.id) — a config agent has `agentId !== sessionId`. The
// owner token IS the session id, so the notice path must find the agent by
// `session.header.id`, NOT the registry key. Using distinct values here makes
// the test fail if a regression matched on the wrong field (a same-value fake
// would pass either way — the "hits the line but not the scenario" trap).
const agent = { id: `agent-${sessionId}`, inject, session: { header: { version: 0, id: sessionId, createdAt: 0 } } } as unknown as Agent
const dispose = ctx.agents.register(agent)
const list = fakeAgentDisposers.get(ctx) ?? []
list.push(dispose)
fakeAgentDisposers.set(ctx, list)
function registerFakeAgent(ctx: Context, sessionId: string): Agent {
const agent = { id: `agent-${sessionId}`, inject: () => {}, session: { header: { version: 0, id: sessionId, createdAt: 0 } } } as unknown as Agent
ctx.agents.register(agent)
return agent
}
/** Unregister every fake agent in this ctx (simulate the owning session disconnecting). */
function unregisterFakeAgents(ctx: Context): void {
for (const dispose of fakeAgentDisposers.get(ctx) ?? []) dispose()
fakeAgentDisposers.delete(ctx)
}
let callCounter = 0
function call(ctx: Context, name: string, args: unknown) {
return ctx.tools.execute({ callId: CallId(`call-${++callCounter}`), name, arguments: args })
function call(ctx: Context, name: string, args: unknown, agent?: Agent) {
return ctx.tools.execute({ callId: CallId(`call-${++callCounter}`), name, arguments: args, ...agent ? { agent } : {} })
}
function text(result: { content: { type: string; text?: string }[] }): string {
@@ -83,56 +83,6 @@ async function callUntilText(
throw new Error(`${name} output did not include ${JSON.stringify(expected)}; last text was ${JSON.stringify(last !== undefined ? text(last) : '')}`)
}
class LossyReadBashExecutor extends BashExecutor {
private readonly task: BashTask = {
id: BashTaskId('bash-lossy'),
command: 'fake',
status: 'running',
exitCode: null,
signal: null,
done: Promise.resolve(),
}
resolve(request: BashExecRequest): BashExecSpec {
return {
command: request.command,
workdir: request.workdir ?? process.cwd(),
timeoutMs: request.timeoutMs ?? 0,
...request.signal ? { signal: request.signal } : {},
owner: request.owner,
}
}
run(): Promise<BashRunResult> {
return Promise.reject(new Error('not used'))
}
start(): BashTask {
return this.task
}
get(id: BashTaskId): BashTask | undefined {
return id === this.task.id ? this.task : undefined
}
ownerOf(): OwnerToken | undefined {
return undefined
}
list(): BashTask[] {
return [this.task]
}
readOutput(id: BashTaskId): BashTaskRead {
if (id !== this.task.id) throw new Error(`unknown bash task "${id}"`)
return { task: this.task, delta: 'tail', lossy: true }
}
kill(): boolean {
return false
}
}
describe('bash tool', () => {
it('returns stdout for a successful command', async () => {
const ctx = await setup()
@@ -205,7 +155,7 @@ describe('bash tool', () => {
expect(text(result)).toMatch(/ENOENT/)
})
it('surfaces aborts as isError', async () => {
it('surfaces foreground aborts as isError', async () => {
const ctx = await setup()
const controller = new AbortController()
const pending = ctx.tools.execute({
@@ -220,7 +170,7 @@ describe('bash tool', () => {
expect(text(result)).toMatch(/aborted/)
})
// Type and required-key violations are now rejected by the harness
// Type and required-key violations are rejected by the harness
// (defineTool validates against the SchemaSpec — the arg-validation RFC) before execute.
it.each([
[{}, /missing required property "command"/],
@@ -250,15 +200,18 @@ describe('bash tool', () => {
expect(text(result)).toMatch(pattern)
})
it('registers all three schemas in the system prompt assembly', async () => {
it('registers the bash schema with run_in_background exposed by default', async () => {
const ctx = await setup()
const names = ctx.tools.schemas().map(schema => schema.name)
expect(names).toEqual(['bash', 'bash_output', 'bash_kill'])
const bashSchema = ctx.tools.schemas()[0]!
const schemas = ctx.tools.schemas()
expect(schemas.map(schema => schema.name)).toEqual(['bash'])
const bashSchema = schemas[0]!
expect(bashSchema.parameters).toMatchObject({
type: 'object',
required: ['command', 'description'],
})
expect(Object.keys(bashSchema.parameters.properties as Record<string, unknown>))
.toContain('run_in_background')
expect(bashSchema.description).toContain('task_output')
})
it('contributes the exit-code habit as its prompt section (guidance the descriptions cannot carry)', async () => {
@@ -275,7 +228,7 @@ describe('bash tool', () => {
await ctx.plugin(ToolRegistry)
await ctx.plugin(LocalBashExecutor, {})
const fiber = await ctx.plugin(ToolBash)
expect(ctx.tools.schemas()).toHaveLength(3)
expect(ctx.tools.schemas()).toHaveLength(1)
expect((await ctx.systemPrompt.assemble()).sections.map(s => s.name)).toEqual(['harness:identity', 'deployment:persona', 'tool:bash'])
await fiber.dispose()
expect(ctx.tools.schemas()).toHaveLength(0)
@@ -292,348 +245,274 @@ describe('bash tool', () => {
expect(ctx.tools.schemas()).toHaveLength(0)
await ctx.plugin(LocalBashExecutor, {})
await new Promise(resolve => setTimeout(resolve, 0))
expect(ctx.tools.schemas()).toHaveLength(3)
})
})
describe('background tools', () => {
it('bash with run_in_background returns a task id immediately', async () => {
const ctx = await setup()
const result = await call(ctx, 'bash', { command: 'sleep 0.2; echo bg-done', description: 'test command', run_in_background: true })
expect(result.isError).toBe(false)
expect(text(result)).toMatch(/^started background task bash-\d+$/)
expect(ctx.tools.schemas()).toHaveLength(1)
})
it('bash_output polls incrementally and reports status', async () => {
const ctx = await setup()
const started = await call(ctx, 'bash', { command: 'echo first; sleep 1; echo second', description: 'test command', run_in_background: true })
const id = BashTaskId(/task (bash-\d+)/.exec(text(started))![1]!)
const first = await callUntilText(ctx, 'bash_output', { task_id: id }, 'first')
expect(text(first)).toContain('first')
expect(text(first)).toContain('[status: running]')
await ctx.bash.get(id)!.done
const second = await call(ctx, 'bash_output', { task_id: id })
expect(text(second)).toContain('second')
expect(text(second)).not.toContain('first')
expect(text(second)).toContain('[status: completed, exit code: 0]')
const third = await call(ctx, 'bash_output', { task_id: id })
expect(text(third)).toContain('(no new output)')
})
it('bash_output flags lossy reads with spill paths', async () => {
it('applies the built-in background default when apply() receives a bare config', async () => {
// Bypasses the schemastery defaults on purpose: apply() must stand on its
// own `?? true` fallback when embedded programmatically without the schema.
const ctx = new Context()
await ctx.plugin(SystemPrompt)
await ctx.plugin(ToolRegistry)
await ctx.plugin(LocalBashExecutor, { maxOutputBytes: 100, graceMs: 200 })
;(ctx.bash as LocalBashExecutor).internals = { spillDir }
await ctx.plugin(ToolBash)
const started = await call(ctx, 'bash', { command: 'for i in $(seq 1 200); do printf "line-%04d\\n" $i; done', description: 'test command', run_in_background: true })
const id = BashTaskId(/task (bash-\d+)/.exec(text(started))![1]!)
await ctx.bash.get(id)!.done
const read = await call(ctx, 'bash_output', { task_id: id })
expect(text(read)).toContain('[some output was dropped from memory; full output: ')
})
it('bash_output reports unavailable when a lossy read has no safe spill path', async () => {
const ctx = new Context()
await ctx.plugin(SystemPrompt)
await ctx.plugin(ToolRegistry)
await ctx.plugin(LossyReadBashExecutor)
await ctx.plugin(ToolBash)
const read = await call(ctx, 'bash_output', { task_id: 'bash-lossy' })
expect(text(read)).toBe('tail\n[some output was dropped from memory; full output: (unavailable)]\n[status: running]')
})
it('bash_kill stops a running task; repeat reports already-finished', async () => {
const ctx = await setup()
const started = await call(ctx, 'bash', { command: 'sleep 60', description: 'test command', run_in_background: true })
const id = BashTaskId(/task (bash-\d+)/.exec(text(started))![1]!)
const killed = await call(ctx, 'bash_kill', { task_id: id })
expect(text(killed)).toBe(`killed background task ${id}`)
await ctx.bash.get(id)!.done
const again = await call(ctx, 'bash_kill', { task_id: id })
expect(text(again)).toBe(`task ${id} had already finished`)
const status = await call(ctx, 'bash_output', { task_id: id })
expect(text(status)).toContain('[status: killed by SIGTERM]')
})
it('unknown task ids are isError for both tools', async () => {
const ctx = await setup()
const read = await call(ctx, 'bash_output', { task_id: 'bash-999' })
expect(read.isError).toBe(true)
expect(text(read)).toMatch(/unknown bash task/)
const kill = await call(ctx, 'bash_kill', { task_id: 'bash-999' })
expect(kill.isError).toBe(true)
})
it.each([
['bash_output', {}, /missing required property "task_id"/],
['bash_output', { task_id: 9 }, /"task_id" must be a string/],
['bash_kill', { task_id: '' }, /invalid task_id/],
])('%s rejects invalid task_id %j', async (tool, args, pattern) => {
const ctx = await setup()
const result = await call(ctx, tool, args)
expect(result.isError).toBe(true)
expect(text(result)).toMatch(pattern)
})
it('injects a completion notice into the owning agent (found via the registry by session token)', async () => {
const ctx = await setup()
const inject = vi.fn()
// The notice path looks the agent up in ctx.agents by its session token, so
// the agent must be REGISTERED (not merely passed to execute). Mount a
// registry and register a fake whose session.header.id IS the owner token.
const agent = registerFakeAgent(ctx, 'bg', inject)
const started = await ctx.tools.execute({
callId: CallId('call-bg'),
name: 'bash',
arguments: { command: 'true', description: 'test command', run_in_background: true },
agent,
})
const id = BashTaskId(/task (bash-\d+)/.exec(text(started))![1]!)
await ctx.bash.get(id)!.done
expect(inject).toHaveBeenCalledTimes(1)
const [content, options] = inject.mock.calls[0] as [
{ type: string; text: string }[],
{ source: { kind: string; plugin: string } },
]
expect(content[0]!.text).toContain(`background bash task ${id} finished`)
expect(content[0]!.text).toContain('bash_output')
expect(options.source).toEqual({ kind: 'plugin', plugin: 'tool-bash' })
})
it('swallows ONLY the disposed-agent inject error', async () => {
const ctx = await setup()
const agent = registerFakeAgent(ctx, 'bg', () => { throw new Error('agent "x" is disposed') })
const started = await ctx.tools.execute({
callId: CallId('call-bg2'),
name: 'bash',
arguments: { command: 'true', description: 'test command', run_in_background: true },
agent,
})
const id = BashTaskId(/task (bash-\d+)/.exec(text(started))![1]!)
await expect(ctx.bash.get(id)!.done).resolves.toBeUndefined()
})
it('rethrows a non-disposed inject failure (not blindly swallowed)', async () => {
const ctx = await setup()
// A real bug in inject (not the benign disposed race) must surface — the
// base-class notifier contains it (logs, does not reject task.done), but
// the listener itself must have thrown rather than silently eaten it.
const errorSpy = vi.spyOn(console, 'error').mockImplementation(() => undefined)
try {
const agent = registerFakeAgent(ctx, 'bg', () => { throw new Error('unexpected inject bug') })
const started = await ctx.tools.execute({
callId: CallId('call-bg3'),
name: 'bash',
arguments: { command: 'true', description: 'test command', run_in_background: true },
agent,
})
const id = BashTaskId(/task (bash-\d+)/.exec(text(started))![1]!)
await ctx.bash.get(id)!.done
// notifyTaskDone caught and logged the rethrown error.
expect(errorSpy).toHaveBeenCalled()
const logged = errorSpy.mock.calls.flat().some(arg => arg instanceof Error && arg.message === 'unexpected inject bug')
expect(logged).toBe(true)
} finally {
errorSpy.mockRestore()
}
})
it('drops the notice cleanly when the owning agent is gone from the registry by completion', async () => {
// A bash task (owned by the host-scoped bash-local fiber) can OUTLIVE its
// per-session agent — e.g. the ACP session disconnects and its AgentHandle
// disposes while the background task is still running. The owner token is
// still on the task, but no live agent carries it anymore, so the registry
// lookup finds nothing and the notice is dropped (no throw).
const ctx = await setup()
const inject = vi.fn()
const agent = registerFakeAgent(ctx, 'bg', inject)
const started = await ctx.tools.execute({
callId: CallId('call-bg4'),
name: 'bash',
arguments: { command: 'true', description: 'test command', run_in_background: true },
agent,
})
const id = BashTaskId(/task (bash-\d+)/.exec(text(started))![1]!)
// Unregister the agent BEFORE the task completes (simulate disconnect).
unregisterFakeAgents(ctx)
await expect(ctx.bash.get(id)!.done).resolves.toBeUndefined()
expect(inject).not.toHaveBeenCalled()
})
it('does not notify when no agent owned the task', async () => {
const ctx = await setup()
const started = await call(ctx, 'bash', { command: 'true', description: 'test command', run_in_background: true })
const id = BashTaskId(/task (bash-\d+)/.exec(text(started))![1]!)
await expect(ctx.bash.get(id)!.done).resolves.toBeUndefined()
await ctx.plugin(LocalBashExecutor, {})
ToolBash.apply(ctx, {})
const schema = ctx.tools.schemas()[0]!
expect(Object.keys(schema.parameters.properties as Record<string, unknown>))
.toContain('run_in_background')
})
})
describe('background task ownership (cross-session isolation)', () => {
/** Run a tool on behalf of a specific agent (sets exec.agent). */
function callAs(ctx: Context, agent: import('@deepseek-ai/dsh-agent').Agent | undefined, name: string, args: unknown) {
return ctx.tools.execute({ callId: CallId(`own-${++callCounter}`), name, arguments: args, ...agent ? { agent } : {} })
}
// Ownership is by TOKEN (session.header.id), NOT agent object identity — so
// each agent needs a DISTINCT session id, else every fake yields the same
// token and the isolation tests pass for the wrong reason (all tasks owned by
// the same token). The impl reads `session.header.id`, so the fakes MUST carry
// it.
const fakeAgent = (sessionId: string) =>
({ inject: () => undefined, session: { header: { version: 0, id: sessionId, createdAt: 0 } } }) as unknown as import('@deepseek-ai/dsh-agent').Agent
describe('background execution through the task runtime', () => {
it('run_in_background acks with the task id, readable through the REAL task_output tool', async () => {
const ctx = await setupWithTasks()
const started = await call(ctx, 'bash', { command: 'echo bg-ok', description: 'test command', run_in_background: true })
expect(started.isError).toBe(false)
expect(text(started)).toBe('started background task bash-1')
it('rejects bash_output/bash_kill for a task owned by a DIFFERENT session token', async () => {
const ctx = await setup()
const a = fakeAgent('sess-a')
const b = fakeAgent('sess-b')
// Agent A starts a long-running background task.
const started = await callAs(ctx, a, 'bash', { command: 'sleep 60', description: 'bg', run_in_background: true })
const id = BashTaskId(/task (bash-\d+)/.exec(text(started))![1]!)
// Agent B (a different session token) cannot read or kill A's task.
const readByB = await callAs(ctx, b, 'bash_output', { task_id: id })
expect(readByB.isError).toBe(true)
expect(text(readByB)).toMatch(/belongs to another session/)
const killByB = await callAs(ctx, b, 'bash_kill', { task_id: id })
expect(killByB.isError).toBe(true)
expect(text(killByB)).toMatch(/belongs to another session/)
// The task is still running (B's kill did nothing) — A can still kill it.
const killByA = await callAs(ctx, a, 'bash_kill', { task_id: id })
expect(killByA.isError).toBe(false)
expect(text(killByA)).toBe(`killed background task ${id}`)
const read = await callUntilText(ctx, 'task_output', { task_id: 'bash-1' }, 'bg-ok')
expect(text(read)).toContain('bg-ok')
// A later read reports the terminal outcome in the generic status line.
const final = await callUntilText(ctx, 'task_output', { task_id: 'bash-1' }, '[status: completed, exit code: 0]')
expect(final.isError).toBe(false)
})
it('a DIFFERENT Agent object with the SAME session token may access the task (ownership is by token, not object identity)', async () => {
// Ownership fences by session.header.id, NOT Agent object identity. Two
// distinct Agent objects sharing one session token (e.g. an agent re-created
// on the same session) are the SAME owner.
const ctx = await setup()
const a1 = fakeAgent('sess-shared')
const a2 = fakeAgent('sess-shared') // distinct object, same token
const started = await callAs(ctx, a1, 'bash', { command: 'sleep 60', description: 'bg', run_in_background: true })
const id = BashTaskId(/task (bash-\d+)/.exec(text(started))![1]!)
const readByA2 = await callAs(ctx, a2, 'bash_output', { task_id: id })
expect(readByA2.isError).toBe(false)
await callAs(ctx, a1, 'bash_kill', { task_id: id }) // cleanup
it('a running background task is killable through the REAL task_kill tool', async () => {
const ctx = await setupWithTasks()
await call(ctx, 'bash', { command: 'sleep 60', description: 'test command', run_in_background: true })
const killed = await call(ctx, 'task_kill', { task_id: 'bash-1' })
expect(text(killed)).toBe('requested cancellation of task bash-1')
// The cancel reached the process handle; the task settles as killed with
// the signal detail mapped by processOutcome.
const final = await call(ctx, 'task_output', { task_id: 'bash-1', wait: true })
expect(text(final)).toContain('[status: killed, signal: SIGTERM]')
})
it('the no-agent (non-loop) caller cannot access an owned task', async () => {
const ctx = await setup()
const a = fakeAgent('sess-a')
const started = await callAs(ctx, a, 'bash', { command: 'sleep 60', description: 'bg', run_in_background: true })
const id = BashTaskId(/task (bash-\d+)/.exec(text(started))![1]!)
// A call with no exec.agent has no token → cannot prove ownership of an owned task.
const read = await callAs(ctx, undefined, 'bash_output', { task_id: id })
expect(read.isError).toBe(true)
expect(text(read)).toMatch(/belongs to another session/)
await callAs(ctx, a, 'bash_kill', { task_id: id }) // cleanup
})
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.
const ctx = await setupWithTasks()
const agent = registerFakeAgent(ctx, 'sess-owner')
const started = await call(ctx, 'bash', { command: 'sleep 60', description: 'test command', run_in_background: true }, agent)
expect(text(started)).toBe('started background task bash-1')
it('an UNOWNED task (started with no agent) is accessible to anyone', async () => {
const ctx = await setup()
// Started by a non-loop caller (no exec.agent) → no owner token recorded.
const started = await callAs(ctx, undefined, 'bash', { command: 'sleep 60', description: 'bg', run_in_background: true })
const id = BashTaskId(/task (bash-\d+)/.exec(text(started))![1]!)
// Any agent (and the no-agent caller) may read/kill it.
const read = await callAs(ctx, fakeAgent('sess-x'), 'bash_output', { task_id: id })
expect(read.isError).toBe(false)
const killed = await callAs(ctx, undefined, 'bash_kill', { task_id: id })
const anon = await call(ctx, 'task_output', { task_id: 'bash-1' })
expect(anon.isError).toBe(true)
expect(text(anon)).toMatch(/belongs to another session/)
const killed = await call(ctx, 'task_kill', { task_id: 'bash-1' }, agent)
expect(killed.isError).toBe(false)
await call(ctx, 'task_output', { task_id: 'bash-1', wait: true }, agent) // await settlement — no orphan
})
it('the owner can still access its task AFTER it completes (owner token persists on the task)', async () => {
const ctx = await setup()
const a = fakeAgent('sess-a')
const b = fakeAgent('sess-b')
const started = await callAs(ctx, a, 'bash', { command: 'echo done', description: 'bg', run_in_background: true })
const id = BashTaskId(/task (bash-\d+)/.exec(text(started))![1]!)
await ctx.bash.get(id)!.done
// Completion does NOT clear ownership: B is still rejected, A still allowed.
const readByB = await callAs(ctx, b, 'bash_output', { task_id: id })
expect(readByB.isError).toBe(true)
expect(text(readByB)).toMatch(/belongs to another session/)
const readByA = await callAs(ctx, a, 'bash_output', { task_id: id })
expect(readByA.isError).toBe(false)
it('fails loud when the task runtime is not loaded', async () => {
const ctx = await setup() // no TaskService / ToolTasks
const result = await call(ctx, 'bash', { command: 'sleep 60', description: 'test command', run_in_background: true })
expect(result.isError).toBe(true)
expect(text(result)).toContain('background tasks unavailable: load @deepseek-ai/dsh-tasks and @deepseek-ai/dsh-tool-tasks')
})
it('ownership SURVIVES an independent tool-bash HMR reload (token lives on the executor)', async () => {
// The owner token lives on the TASK inside the executor (dsh-bash fiber), NOT
// in a tool-bash plugin-local map. So reloading ONLY tool-bash (executor +
// task survive) preserves ownership. This is the regression guard: a
// plugin-local map would make B accessible after reload, and this test would
// catch it.
it('a pre-aborted call refuses to start: isError, no process spawned', async () => {
class CountingStartExecutor extends BashExecutor {
starts = 0
resolve(request: BashExecRequest): BashExecSpec {
return { command: request.command, workdir: request.workdir ?? '/x', timeoutMs: request.timeoutMs ?? 0 }
}
run(): Promise<BashRunResult> { return Promise.reject(new Error('unused')) }
start(spec: BashExecSpec): BashProcess {
this.starts += 1
return {
command: spec.command,
status: 'completed',
exitCode: 0,
signal: null,
done: Promise.resolve(),
readOutput: () => ({ delta: '', lossy: false }),
kill: () => false,
}
}
}
const ctx = new Context()
await ctx.plugin(SystemPrompt)
await ctx.plugin(ToolRegistry)
await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000, graceMs: 200 })
;(ctx.bash as LocalBashExecutor).internals = { spillDir }
const fiber = await ctx.plugin(ToolBash)
const a = fakeAgent('sess-a')
const b = fakeAgent('sess-b')
const started = await callAs(ctx, a, 'bash', { command: 'sleep 60', description: 'bg', run_in_background: true })
const id = BashTaskId(/task (bash-\d+)/.exec(text(started))![1]!)
// Before reload: B is rejected (A owns it).
expect((await callAs(ctx, b, 'bash_output', { task_id: id })).isError).toBe(true)
// Reload ONLY tool-bash; the executor and its running task (with its owner
// token) survive.
await fiber.dispose()
await ctx.plugin(AgentRegistry)
await ctx.plugin(TaskService)
await ctx.plugin(ToolTasks)
await ctx.plugin(CountingStartExecutor)
await ctx.plugin(ToolBash)
expect(ctx.bash.get(id)?.status).toBe('running')
expect(ctx.bash.ownerOf(id)).toBe('sess-a')
// After reload, ownership is INTACT → B is STILL rejected.
expect((await callAs(ctx, b, 'bash_output', { task_id: id })).isError).toBe(true)
await callAs(ctx, a, 'bash_kill', { task_id: id }) // cleanup
const controller = new AbortController()
controller.abort()
const result = await ctx.tools.execute({
callId: CallId('call-pre-aborted'),
name: 'bash',
arguments: { command: 'sleep 60', description: 'test command', run_in_background: true },
signal: controller.signal,
})
expect(result.isError).toBe(true)
expect(text(result)).toContain('command aborted')
expect((ctx.bash as CountingStartExecutor).starts).toBe(0)
})
it('a failed registration kills the just-started process (no orphan without an id)', async () => {
class LeakProbeExecutor extends BashExecutor {
kills = 0
resolve(request: BashExecRequest): BashExecSpec {
return { command: request.command, workdir: request.workdir ?? '/x', timeoutMs: request.timeoutMs ?? 0 }
}
run(): Promise<BashRunResult> { return Promise.reject(new Error('unused')) }
start(spec: BashExecSpec): BashProcess {
let close!: () => void
const done = new Promise<void>((res) => { close = res })
const proc: BashProcess = {
command: spec.command,
status: 'running',
exitCode: null,
signal: null,
done,
readOutput: () => ({ delta: '', lossy: false }),
kill: () => {
this.kills += 1
proc.status = 'killed'
close()
return true
},
}
return proc
}
}
// TaskService WITHOUT any control surface: register() throws AFTER the
// process already started — the producer must kill and await it.
const ctx = new Context()
await ctx.plugin(SystemPrompt)
await ctx.plugin(ToolRegistry)
await ctx.plugin(AgentRegistry)
await ctx.plugin(TaskService)
await ctx.plugin(LeakProbeExecutor)
await ctx.plugin(ToolBash)
const result = await call(ctx, 'bash', { command: 'sleep 60', description: 'test command', run_in_background: true })
expect(result.isError).toBe(true)
expect(text(result)).toContain('no control surface is attached')
// The call resolved only after the kill landed (the catch awaits done).
expect((ctx.bash as LeakProbeExecutor).kills).toBe(1)
})
it('enableRunInBackground: false removes the parameter and flips the description', async () => {
const ctx = new Context()
await ctx.plugin(SystemPrompt)
await ctx.plugin(ToolRegistry)
await ctx.plugin(LocalBashExecutor, {})
await ctx.plugin(ToolBash, { enableRunInBackground: false })
const schema = ctx.tools.schemas().find(s => s.name === 'bash')!
expect(Object.keys(schema.parameters.properties as Record<string, unknown>))
.toEqual(['command', 'description', 'timeoutMs', 'workdir'])
expect(schema.description).toContain('Background execution is not available')
expect(schema.description).not.toContain('run_in_background')
// The registry-held definition agrees (schema and capability never disagree).
const parameters = ctx.tools.get('bash')!.parameters as { properties: Record<string, unknown> }
expect('run_in_background' in parameters.properties).toBe(false)
})
})
describe('renderProcessRead', () => {
const base: BashProcessRead = { delta: 'out\n', lossy: false }
it('returns the delta verbatim for a lossless read', () => {
expect(renderProcessRead(base)).toBe('out\n')
expect(renderProcessRead({ delta: '', lossy: false })).toBe('')
})
it('appends the loss notice with the available spill paths', () => {
expect(renderProcessRead({ ...base, lossy: true, stdoutSpillPath: '/spill/out.log' }))
.toBe('out\n[some output was dropped from memory; full output: /spill/out.log]')
expect(renderProcessRead({ ...base, lossy: true, stdoutSpillPath: '/spill/out.log', stderrSpillPath: '/spill/err.log' }))
.toBe('out\n[some output was dropped from memory; full output: /spill/out.log, /spill/err.log]')
})
it('reports (unavailable) when a lossy read has no safe spill path', () => {
expect(renderProcessRead({ ...base, lossy: true }))
.toBe('out\n[some output was dropped from memory; full output: (unavailable)]')
})
it('an empty lossy delta is the notice alone', () => {
expect(renderProcessRead({ delta: '', lossy: true, stderrSpillPath: '/spill/err.log' }))
.toBe('[some output was dropped from memory; full output: /spill/err.log]')
})
it('inserts the separating newline only when the delta lacks one', () => {
expect(renderProcessRead({ delta: 'tail', lossy: true }))
.toBe('tail\n[some output was dropped from memory; full output: (unavailable)]')
expect(renderProcessRead({ delta: 'tail\n', lossy: true }))
.toBe('tail\n[some output was dropped from memory; full output: (unavailable)]')
})
})
describe('processOutcome', () => {
function settled(over: Partial<BashProcess>): BashProcess {
return {
command: 'x',
status: 'completed',
exitCode: 0,
signal: null,
done: Promise.resolve(),
readOutput: () => ({ delta: '', lossy: false }),
kill: () => false,
...over,
}
}
it('maps a signal-killed process to killed with the signal detail', () => {
expect(processOutcome(settled({ status: 'killed', signal: 'SIGTERM' })))
.toEqual({ status: 'killed', detail: 'signal: SIGTERM' })
})
it('maps a killed process without a recorded signal (kill raced exit / spawn failure)', () => {
expect(processOutcome(settled({ status: 'killed', exitCode: null })))
.toEqual({ status: 'killed', detail: 'killed before exit' })
})
it('maps a completed process to its exit code', () => {
expect(processOutcome(settled({ exitCode: 3 })))
.toEqual({ status: 'completed', detail: 'exit code: 3' })
})
it('defensively reads a null exit code as 0 (handle shapes from other executors)', () => {
expect(processOutcome(settled({ exitCode: null })))
.toEqual({ status: 'completed', detail: 'exit code: 0' })
})
})
describe('session-cwd routing (per-session workdir)', () => {
function callAs(ctx: Context, agent: import('@deepseek-ai/dsh-agent').Agent | undefined, args: unknown) {
return ctx.tools.execute({ callId: CallId(`cwd-${++callCounter}`), name: 'bash', arguments: args, ...agent ? { agent } : {} })
}
// An agent whose session header carries a cwd (what session/new records).
const agentInCwd = (cwd: string) =>
({ inject: () => undefined, session: { header: { version: 0, id: 'c', createdAt: 0, cwd } } }) as unknown as import('@deepseek-ai/dsh-agent').Agent
({ inject: () => undefined, session: { header: { version: 0, id: 'c', createdAt: 0, cwd } } }) as unknown as Agent
it('defaults bash to the agent\'s session cwd (not the server launch dir)', async () => {
const ctx = await setup()
const result = await callAs(ctx, agentInCwd('/tmp'), { command: 'pwd', description: 'pwd' })
const result = await call(ctx, 'bash', { command: 'pwd', description: 'pwd' }, agentInCwd('/tmp'))
expect(text(result).trim()).toMatch(/\/tmp$/)
})
it('an explicit absolute workdir overrides the session cwd', async () => {
const ctx = await setup()
const result = await callAs(ctx, agentInCwd('/'), { command: 'pwd', description: 'pwd', workdir: '/tmp' })
const result = await call(ctx, 'bash', { command: 'pwd', description: 'pwd', workdir: '/tmp' }, agentInCwd('/'))
expect(text(result).trim()).toMatch(/\/tmp$/)
})
it('a relative workdir is resolved against the session cwd', async () => {
const ctx = await setup()
// session cwd /usr + relative 'bin' → /usr/bin
const result = await callAs(ctx, agentInCwd('/usr'), { command: 'pwd', description: 'pwd', workdir: 'bin' })
const result = await call(ctx, 'bash', { command: 'pwd', description: 'pwd', workdir: 'bin' }, agentInCwd('/usr'))
expect(text(result).trim()).toMatch(/\/usr\/bin$/)
})
it('two sessions with different cwds each run bash in their own dir', async () => {
const ctx = await setup()
const inUsr = await callAs(ctx, agentInCwd('/usr'), { command: 'pwd', description: 'pwd' })
const inTmp = await callAs(ctx, agentInCwd('/tmp'), { command: 'pwd', description: 'pwd' })
const inUsr = await call(ctx, 'bash', { command: 'pwd', description: 'pwd' }, agentInCwd('/usr'))
const inTmp = await call(ctx, 'bash', { command: 'pwd', description: 'pwd' }, agentInCwd('/tmp'))
expect(text(inUsr).trim()).toMatch(/\/usr$/)
expect(text(inTmp).trim()).toMatch(/\/tmp$/)
})
@@ -697,35 +576,6 @@ describe('renderResult', () => {
})
})
describe('status lines', () => {
it('reports kills without a recorded signal (executor raced process exit)', async () => {
const ctx = await setup()
const started = await call(ctx, 'bash', { command: 'sleep 60', description: 'test command', run_in_background: true })
const id = BashTaskId(/task (bash-\d+)/.exec(text(started))![1]!)
const task = ctx.bash.get(id)!
await call(ctx, 'bash_kill', { task_id: id })
await task.done
// Simulate the variant where the close event carried no signal.
task.signal = null
const read = await call(ctx, 'bash_output', { task_id: id })
expect(text(read)).toContain('[status: killed]')
})
it('reports completed tasks with a null exit code as exit 0', async () => {
const ctx = await setup()
const started = await call(ctx, 'bash', { command: 'true', description: 'test command', run_in_background: true })
const id = BashTaskId(/task (bash-\d+)/.exec(text(started))![1]!)
const task = ctx.bash.get(id)!
await task.done
// Defensive: completed tasks always carry an exit code in practice; the
// ?? 0 fallback covers task shapes from other executor implementations.
task.exitCode = null
const read = await call(ctx, 'bash_output', { task_id: id })
expect(text(read)).toContain('[status: completed, exit code: 0]')
})
})
describe('tool-owned UI presentation (presentCall / presentResult)', () => {
it('bash presentCall: a foreground run is a terminal card (command title, description, workdir → cwd absolute or relative)', async () => {
const ctx = await setup()
@@ -851,14 +701,6 @@ describe('tool-owned UI presentation (presentCall / presentResult)', () => {
})).toBeUndefined()
})
it('bash_output / bash_kill presentCall: a readable task-scoped title, task id as rawInput', async () => {
const ctx = await setup()
expect(ctx.tools.get('bash_output')!.presentCall!({ task_id: 'bash-3' }))
.toEqual({ card: 'generic', title: 'Read output from background task bash-3', kind: 'execute', rawInput: 'bash-3' })
expect(ctx.tools.get('bash_kill')!.presentCall!({ task_id: 'bash-3' }))
.toEqual({ card: 'generic', title: 'Kill background task bash-3', kind: 'execute', rawInput: 'bash-3' })
})
it('presentCall validates softly: malformed args (missing required description) return undefined, never throw', async () => {
const ctx = await setup()
// defineTool wraps presentCall to soft-validate against the schema and fall
@@ -879,8 +721,8 @@ describe('the model-facing bash tool builds its request from named args only (no
* future refactor that blindly forwards `...args` — which would silently thread
* model input into the post-scrub `env` merge — NOT to defend a trust boundary
* (the credential scrub in dsh-bash-local is the security control; see the
* bash-stdin-env RFC). Foreground `run()` returns a canned result; `start()` is
* unused here.
* bash-stdin-env RFC). Foreground `run()` returns a canned result; `start()`
* hands back an already-settled fake handle so the task registration completes.
*/
class RecordingBashExecutor extends BashExecutor {
readonly requests: BashExecRequest[] = []
@@ -893,7 +735,6 @@ describe('the model-facing bash tool builds its request from named args only (no
...request.signal ? { signal: request.signal } : {},
...request.stdin !== undefined ? { stdin: request.stdin } : {},
...request.env !== undefined ? { env: request.env } : {},
owner: request.owner,
}
}
run(): Promise<BashRunResult> {
@@ -902,12 +743,17 @@ describe('the model-facing bash tool builds its request from named args only (no
stdout: { text: 'ok', truncated: false }, stderr: { text: '', truncated: false },
})
}
start(): BashTask { throw new Error('unused') }
get(): BashTask | undefined { return undefined }
ownerOf(): OwnerToken | undefined { return undefined }
list(): BashTask[] { return [] }
readOutput(): BashTaskRead { throw new Error('unused') }
kill(): boolean { return false }
start(spec: BashExecSpec): BashProcess {
return {
command: spec.command,
status: 'completed',
exitCode: 0,
signal: null,
done: Promise.resolve(),
readOutput: () => ({ delta: '', lossy: false }),
kill: () => false,
}
}
}
async function setupRecording() {
@@ -915,6 +761,8 @@ describe('the model-facing bash tool builds its request from named args only (no
await ctx.plugin(SystemPrompt)
await ctx.plugin(ToolRegistry)
await ctx.plugin(AgentRegistry)
await ctx.plugin(TaskService)
await ctx.plugin(ToolTasks)
await ctx.plugin(RecordingBashExecutor)
await ctx.plugin(ToolBash)
return { ctx, bash: ctx.bash as RecordingBashExecutor }
@@ -947,9 +795,7 @@ describe('the model-facing bash tool builds its request from named args only (no
it('a background bash call likewise carries no env/stdin', async () => {
const { ctx, bash } = await setupRecording()
// start() throws in this recorder, but resolve() runs first and records the
// request — which is all this no-forward assertion needs.
await ctx.tools.execute({
const result = await ctx.tools.execute({
callId: CallId('no-forward-2'),
name: 'bash',
arguments: {
@@ -960,13 +806,14 @@ describe('the model-facing bash tool builds its request from named args only (no
stdin: 'x',
},
})
// The call really went down the background path (the recorder sees the real
// request the consumer built, so the absent env/stdin below is a real
// negative, not a recorder that drops everything).
expect(text(result)).toBe('started background task bash-1')
expect(bash.requests).toHaveLength(1)
const request = bash.requests[0]!
expect(request.command).toBe('sleep 1')
expect('env' in request).toBe(false)
expect('stdin' in request).toBe(false)
// The owner token IS set on a background call (the isolation fence) — proving
// the recorder sees the real request the consumer built, so the absent
// env/stdin above is a real negative, not a recorder that drops everything.
expect('owner' in request).toBe(true)
})
})