985 lines
42 KiB
TypeScript
985 lines
42 KiB
TypeScript
import { describe, expect, it } from 'vitest'
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import { Context } from 'cordis'
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import LlmService, { CallId, StreamChunk } from '@deepseek-ai/dsh-llm'
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import SessionStore, { SessionId, TurnEndReason } from '@deepseek-ai/dsh-session'
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import SystemPrompt from '@deepseek-ai/dsh-system-prompt'
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import ToolRegistry, { defineTool } from '@deepseek-ai/dsh-tools'
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import AgentRegistry, { AgentId } from '@deepseek-ai/dsh-agent'
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import AgentLoop, { ReactLoopAgent } from '@deepseek-ai/dsh-agent-loop'
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import { MockAdapter, maxTokensResponse, textResponse, toolCallResponse } from './mock-adapter.ts'
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async function harness(adapter: MockAdapter, persona = '') {
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const ctx = new Context()
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await ctx.plugin(LlmService)
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await ctx.plugin(SessionStore)
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await ctx.plugin(SystemPrompt, { persona })
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await ctx.plugin(ToolRegistry)
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await ctx.plugin(AgentRegistry)
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await ctx.plugin(AgentLoop, { agents: [] })
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ctx.llm.registerAdapter(['mock'], adapter)
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return ctx
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}
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/**
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* Wait for the agent's NEXT transition to idle. Always event-based: callers
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* invoke this right after send(), when the loop hasn't woken yet (status is
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* still 'idle' synchronously), so polling the current status would lie.
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*/
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function waitForIdle(ctx: Context, agent: ReactLoopAgent): Promise<void> {
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return new Promise((resolve) => {
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const dispose = ctx.on('agent/status', (subject, status) => {
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if (subject === agent && status === 'idle') {
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dispose()
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resolve()
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}
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})
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})
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}
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function send(agent: ReactLoopAgent, text: string) {
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agent.send([{ type: 'text', text }])
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}
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describe('agent loop', () => {
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it('runs a simple turn: queued message → model → idle, with ordered events', async () => {
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const adapter = new MockAdapter([textResponse('hello there')])
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const ctx = await harness(adapter)
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const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
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// All boundaries — turn and step — are durable session events on the
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// session/event feed (no agent/* mirror). Record them in fire order to
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// assert the full boundary nesting.
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const order: string[] = []
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ctx.on('session/event', (_session, event) => {
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if (event.type === 'turn/start' || event.type === 'step/start' || event.type === 'step/end' || event.type === 'turn/end') {
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order.push(event.type)
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}
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})
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send(agent, 'hi')
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await waitForIdle(ctx, agent)
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expect(order).toEqual(['turn/start', 'step/start', 'step/end', 'turn/end'])
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const types = agent.session.events.map(e => e.type)
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// turn/start opens the turn, THEN the queued user message is recorded inside
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// it (every event is turn-enclosed), then the assembled message (carrying the
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// step's usage).
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expect(types[0]).toBe('turn/start')
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expect(types[1]).toBe('user/message')
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expect(types).toContain('assistant/message')
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const assistantMessage = agent.session.events.find(e => e.type === 'assistant/message')
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expect(assistantMessage?.type === 'assistant/message' && assistantMessage.data.usage).toEqual({ inputTokens: 10, outputTokens: 'hello there'.length })
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expect(types.at(-1)).toBe('turn/end')
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// derived history: user + assistant
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const messages = agent.session.deriveMessages()
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expect(messages.map(m => m.role)).toEqual(['user', 'assistant'])
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expect(messages[1]!.content).toEqual([{ type: 'text', text: 'hello there' }])
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})
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it('round-trips tool calls: model requests tool → executes → result in next request', async () => {
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const adapter = new MockAdapter([
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toolCallResponse('c1', 'echo', { text: 'ping' }, 'calling echo'),
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textResponse('done'),
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])
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const ctx = await harness(adapter)
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ctx.tools.register(defineTool({
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name: 'echo',
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description: 'echo back',
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parameters: { text: { type: 'string' } },
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async execute(args) {
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return [{ type: 'text', text: `echo: ${args.text}` }]
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},
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}))
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const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
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send(agent, 'use the tool')
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await waitForIdle(ctx, agent)
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// two model calls happened (tool-call step, then final step)
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expect(adapter.requests).toHaveLength(2)
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// the second request's derived history contains the tool result
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const secondMessages = adapter.requests[1]!.messages
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const toolResultMessage = secondMessages.find(m =>
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m.content.some(b => b.type === 'tool-result'))
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expect(toolResultMessage).toBeDefined()
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const block = toolResultMessage!.content.find(b => b.type === 'tool-result')!
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expect(block).toMatchObject({ toolCallId: 'c1', isError: false })
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expect((block).content).toEqual([{ type: 'text', text: 'echo: ping' }])
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// session log records call + result
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const types = agent.session.events.map(e => e.type)
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expect(types).toContain('tool/call')
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expect(types).toContain('tool/result')
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})
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it('threads a tool-attached meta (execute object return) onto the tool/result event', async () => {
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const adapter = new MockAdapter([
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toolCallResponse('c1', 'writer', { path: 'a.txt' }, 'writing'),
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textResponse('done'),
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])
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const ctx = await harness(adapter)
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// A tool that returns the { content, meta } object form: the loop must
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// persist `meta` on the tool/result event so a UI reproduces the card on replay.
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ctx.tools.register(defineTool({
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name: 'writer',
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description: 'writes a file',
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parameters: { path: { type: 'string' } },
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async execute() {
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return { content: [{ type: 'text', text: 'ok' }], meta: { diffs: [{ path: 'a.txt', oldText: null, newText: 'x' }] } }
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},
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}))
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const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
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send(agent, 'use the tool')
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await waitForIdle(ctx, agent)
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const toolResult = agent.session.events.find(e => e.type === 'tool/result')
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expect(toolResult?.type === 'tool/result' && toolResult.data.meta)
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.toEqual({ diffs: [{ path: 'a.txt', oldText: null, newText: 'x' }] })
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})
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it('renders harness identity, then the persona, then tool guidance — with {{variables}} resolved', async () => {
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const adapter = new MockAdapter([textResponse('ok')])
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// The persona is a TEMPLATE: {{model}} is the loop-registered variable
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// projecting this agent's configured model, so the model knows its own name.
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const ctx = await harness(adapter, 'You are a test agent on {{model}}.')
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ctx.systemPrompt.section({ name: 'tool:noop', order: 100, text: 'Use the noop tool wisely.' })
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ctx.tools.register(defineTool({
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name: 'noop',
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description: 'does nothing',
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parameters: {},
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async execute() {
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return []
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},
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}))
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const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
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send(agent, 'hi')
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await waitForIdle(ctx, agent)
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const request = adapter.requests[0]
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expect(request!.system).toBe('You are an AI agent powered by the DeepSeek Harness SDK.\n\nYou are a test agent on mock.\n\nUse the noop tool wisely.')
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expect(request!.tools?.map(t => t.name)).toEqual(['noop'])
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})
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it('resolves {{cwd}} from the agent session workspace (factory create with meta.cwd)', async () => {
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const adapter = new MockAdapter([textResponse('ok')])
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const ctx = await harness(adapter, 'Working in {{cwd}}.')
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const handle = await ctx.agents.create({
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agentId: AgentId('a-cwd'),
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sessionId: SessionId('s-cwd'),
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meta: { cwd: '/work/space' },
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agentOptions: { model: 'mock' },
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})
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const agent = handle.agent as ReactLoopAgent
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send(agent, 'hi')
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await waitForIdle(ctx, agent)
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expect(adapter.requests[0]!.system).toBe('You are an AI agent powered by the DeepSeek Harness SDK.\n\nWorking in /work/space.')
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})
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it('contains a strict-variable render failure: the turn errors, the loop keeps serving turns', async () => {
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// A missing cwd variable must fail one turn without preventing a later valid turn.
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const adapter = new MockAdapter([textResponse('ok after rescue')])
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const ctx = await harness(adapter, 'In {{cwd}}.')
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const errors: Error[] = []
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ctx.on('agent/error', (_agent, _turn, _step, error) => void errors.push(error))
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const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
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send(agent, 'hi')
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await waitForIdle(ctx, agent)
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expect(adapter.requests).toHaveLength(0) // the request was never sent
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expect(errors.some(e => e.message.includes('no value for this assembly'))).toBe(true)
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const turnEnd = agent.session.events.find(e => e.type === 'turn/end')
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expect(turnEnd?.type === 'turn/end' && turnEnd.data.reason.kind).toBe('error')
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// The loop survived: a waterfall listener rescues {{cwd}} and the SAME
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// agent completes a real model turn.
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ctx.on('system-prompt/assemble', async (assembly, _context, next) => {
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assembly.variables['cwd'] = '/rescued'
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return next()
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})
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send(agent, 'again')
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await waitForIdle(ctx, agent)
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expect(adapter.requests).toHaveLength(1)
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expect(adapter.requests[0]!.system).toBe('You are an AI agent powered by the DeepSeek Harness SDK.\n\nIn /rescued.')
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const turnEnds = agent.session.events.filter(e => e.type === 'turn/end')
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expect(turnEnds).toHaveLength(2)
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expect(turnEnds[1]?.type === 'turn/end' && turnEnds[1].data.reason.kind).toBe('completed')
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})
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it('supports the model-via-agent/request path with a {{model}} persona: the supplier states it via the assemble waterfall', async () => {
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// AgentOptions.model unset: the model arrives in the agent/request
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// waterfall (the loop's documented fallback — see runStep's no-model
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// error). {{model}} renders BEFORE that waterfall, so the SAME plugin
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// states the fact early on system-prompt/assemble — the owner of a
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// late-bound fact owns stating it wherever it is claimed.
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const adapter = new MockAdapter([textResponse('ok')])
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const ctx = await harness(adapter, 'You run on {{model}}.')
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ctx.on('system-prompt/assemble', async (assembly, _context, next) => {
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assembly.variables['model'] = 'mock'
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return next()
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})
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ctx.on('agent/request', async (_agent, _turn, _step, config, _next) => {
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return { ...config, model: 'mock' }
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})
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const agent = ctx.agentLoop.create(AgentId('a-late-model'), {})
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send(agent, 'hi')
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await waitForIdle(ctx, agent)
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expect(adapter.requests).toHaveLength(1)
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expect(adapter.requests[0]!.model).toBe('mock')
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expect(adapter.requests[0]!.system).toBe('You are an AI agent powered by the DeepSeek Harness SDK.\n\nYou run on mock.')
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})
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it.each([
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['BigInt', { n: 1n }],
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['Map', new Map([['key', 'value']])],
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['class instance', new (class ResultMeta { x = 1 })()],
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])('normalizes non-JSON tool meta (%s) before the durable result commit', async (_kind, meta) => {
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const adapter = new MockAdapter([
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toolCallResponse('bad-meta-call', 'bad-meta', {}, 'calling'),
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textResponse('recovered'),
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])
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const ctx = await harness(adapter)
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ctx.tools.register(defineTool({
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name: 'bad-meta',
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description: 'returns invalid durable metadata',
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parameters: {},
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execute: () => Promise.resolve({ content: [{ type: 'text' as const, text: 'apparent success' }], meta }),
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}))
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const agent = ctx.agentLoop.create(AgentId('bad-meta-agent'), { model: 'mock' })
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send(agent, 'use the tool')
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await waitForIdle(ctx, agent)
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const result = agent.session.events.find(event => event.type === 'tool/result')
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expect(result?.type).toBe('tool/result')
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if (result?.type === 'tool/result') {
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expect(result.data.callId).toBe('bad-meta-call')
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expect(result.data.isError).toBe(true)
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expect(result.data.meta).toBeUndefined()
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expect(result.data.content).toEqual([{
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type: 'text',
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text: 'Error: tools/execute must return a losslessly JSON-serializable ToolExecutionResult',
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}])
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}
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// The normalized failure was durably logged and fed back to the model; the
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// turn continued normally instead of failing after an apparent success.
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expect(adapter.requests).toHaveLength(2)
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expect(JSON.stringify(adapter.requests[1]!.messages)).toContain('losslessly JSON-serializable')
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})
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it('omits the system field when a system-prompt/assemble veto empties the assembly', async () => {
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// The documented escape valve: a deployment that must drop the harness
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// openers short-circuits the assemble waterfall; the request then carries
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// NO system field at all (not an empty string).
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const adapter = new MockAdapter([textResponse('ok')])
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const ctx = await harness(adapter)
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ctx.on('system-prompt/assemble', async () => ({ sections: [], tools: [], variables: {} }))
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const agent = ctx.agentLoop.create(AgentId('a-no-system'), { model: 'mock' })
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send(agent, 'hi')
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await waitForIdle(ctx, agent)
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expect(adapter.requests).toHaveLength(1)
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expect('system' in adapter.requests[0]!).toBe(false)
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})
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it('records raw chunks for replay as assistant/chunk session events', async () => {
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const adapter = new MockAdapter([textResponse('abc')])
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const ctx = await harness(adapter)
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const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
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send(agent, 'hi')
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await waitForIdle(ctx, agent)
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const chunkEvents = agent.session.events.filter(e => e.type === 'assistant/chunk')
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// textResponse('abc') = block-start + 3 deltas + block-end + usage + finish = 7
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expect(chunkEvents).toHaveLength(7)
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// replay: chunk events alone re-assemble to the recorded assistant message
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const deltaText = chunkEvents
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.flatMap(e => e.type === 'assistant/chunk' ? [e.data.chunk] : [])
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.filter((c: StreamChunk): c is Extract<StreamChunk, { type: 'text-delta' }> => c.type === 'text-delta')
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.map(c => c.text)
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.join('')
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expect(deltaText).toBe('abc')
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})
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it('injects steering between steps and continues the turn', async () => {
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const adapter = new MockAdapter([
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toolCallResponse('c1', 'slow', {}),
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textResponse('addressed the steering'),
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])
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const ctx = await harness(adapter)
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const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
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ctx.tools.register(defineTool({
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name: 'slow',
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description: '',
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parameters: {},
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async execute() {
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// steer while the turn is running (during tool execution)
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agent.steer([{ type: 'text', text: 'change of plans' }])
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return [{ type: 'text', text: 'tool done' }]
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},
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}))
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send(agent, 'start')
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await waitForIdle(ctx, agent)
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const types = agent.session.events.map(e => e.type)
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expect(types).toContain('steering/message')
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// steering recorded before the second step's request derived its history
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const steeringSeq = agent.session.events.find(e => e.type === 'steering/message')!.seq
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const secondStepStart = agent.session.events.filter(e => e.type === 'step/start')[1]
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expect(secondStepStart).toBeDefined()
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expect(steeringSeq).toBeLessThan(secondStepStart!.seq)
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// the second model request saw the steering content
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const secondRequest = adapter.requests[1]
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const flat = JSON.stringify(secondRequest!.messages)
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expect(flat).toContain('change of plans')
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})
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it('steering while idle behaves like send (starts a turn)', async () => {
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const adapter = new MockAdapter([textResponse('ok')])
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const ctx = await harness(adapter)
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const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
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agent.steer([{ type: 'text', text: 'hello' }])
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await waitForIdle(ctx, agent)
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expect(agent.session.events.some(e => e.type === 'user/message')).toBe(true)
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})
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it('inject() while idle wraps context in a one-shot turn, visible to the next request', async () => {
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const adapter = new MockAdapter([textResponse('ok')])
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const ctx = await harness(adapter)
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const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
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agent.inject([{ type: 'text', text: 'file changed: a.ts' }], { source: { kind: 'plugin', plugin: 'watcher' } })
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// The idle inject records a self-contained turn (turn/start → context/message
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// → turn/end) so the event stays turn-enclosed, but does NOT run the model.
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await new Promise(r => setTimeout(r, 20))
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expect(agent.status).toBe('idle')
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expect(adapter.requests).toHaveLength(0)
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const injectedTurn = agent.session.events.filter(e => e.type === 'turn/start')
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expect(injectedTurn).toHaveLength(1)
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const it0 = injectedTurn[0]!
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expect(it0.type === 'turn/start' && it0.data.trigger.kind).toBe('injection')
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expect(agent.session.events.at(-1)!.type).toBe('turn/end') // turn-enclosed
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send(agent, 'go')
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await waitForIdle(ctx, agent)
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const flat = JSON.stringify(adapter.requests[0]!.messages)
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expect(flat).toContain('file changed: a.ts')
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expect(flat).toContain('<context source=\\"plugin\\">')
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})
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it('inject() while running appends into the open turn (no extra synthetic turn)', async () => {
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const adapter = new MockAdapter([
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toolCallResponse('c1', 'noticer', {}, 'calling'),
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textResponse('done'),
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])
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const ctx = await harness(adapter)
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const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
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// A tool that injects mid-execution: at this point the agent is running, so
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// inject must append the context/message into the ALREADY-open turn rather
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// than wrap it in its own one-shot turn.
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ctx.tools.register(defineTool({
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name: 'noticer',
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description: 'injects a notice',
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parameters: {},
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async execute() {
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agent.inject([{ type: 'text', text: 'mid-turn notice' }], { source: { kind: 'plugin', plugin: 'x' } })
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return [{ type: 'text', text: 'ok' }]
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},
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}))
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send(agent, 'go')
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await waitForIdle(ctx, agent)
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// Exactly ONE turn ran (no synthetic injection turn), and the mid-turn
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// context/message sits inside it.
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const turnStarts = agent.session.events.filter(e => e.type === 'turn/start')
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expect(turnStarts).toHaveLength(1)
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const ts0 = turnStarts[0]!
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expect(ts0.type === 'turn/start' && ts0.data.trigger.kind).toBe('message')
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expect(agent.session.events.some(e => e.type === 'context/message')).toBe(true)
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})
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it('agent/turn-continuation can force-continue (/loop pattern) and force-stop', async () => {
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// force-continue: model never calls tools, but a plugin forces 3 steps
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const adapter = new MockAdapter([
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textResponse('step 1'),
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textResponse('step 2'),
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textResponse('step 3'),
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])
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const ctx = await harness(adapter)
|
|
const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
|
|
|
|
let steps = 0
|
|
ctx.on('session/event', (_session, event) => { if (event.type === 'step/end') steps++ })
|
|
ctx.on('agent/turn-continuation', async (_agent, _turn, _defaultDecision, next) => {
|
|
if (steps < 3) return { action: 'continue' as const }
|
|
return next()
|
|
})
|
|
|
|
send(agent, 'go')
|
|
await waitForIdle(ctx, agent)
|
|
expect(steps).toBe(3)
|
|
expect(adapter.requests).toHaveLength(3)
|
|
})
|
|
|
|
it('agent/turn-continuation can veto continuation despite tool calls (budget-guard pattern)', async () => {
|
|
const adapter = new MockAdapter([toolCallResponse('c1', 'echo', { text: 'x' })])
|
|
const ctx = await harness(adapter)
|
|
ctx.tools.register(defineTool({
|
|
name: 'echo',
|
|
description: '',
|
|
parameters: { text: { type: 'string' } },
|
|
async execute(args) {
|
|
return [{ type: 'text', text: String(args.text) }]
|
|
},
|
|
}))
|
|
const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
|
|
|
|
ctx.on('agent/turn-continuation', async () => ({ action: 'stop' }) as const)
|
|
|
|
send(agent, 'go')
|
|
await waitForIdle(ctx, agent)
|
|
// only one model call despite the tool call requesting a follow-up
|
|
expect(adapter.requests).toHaveLength(1)
|
|
// tool still executed before the decision
|
|
expect(agent.session.events.some(e => e.type === 'tool/result')).toBe(true)
|
|
})
|
|
|
|
it('agent/request waterfall switches models by returning a replacement config; the switch is logged', async () => {
|
|
const adapter = new MockAdapter([textResponse('ok')])
|
|
const ctx = await harness(adapter)
|
|
ctx.llm.registerAdapter(['other-model'], adapter)
|
|
const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
|
|
|
|
ctx.on('agent/request', async (_agent, _turn, _step, config, _next) => {
|
|
// The seed is frozen — config is not a mutable per-call knob; a switch
|
|
// is proposed by returning a replacement, and the loop logs it.
|
|
expect(Object.isFrozen(config)).toBe(true)
|
|
expect(() => { (config as { model: string }).model = 'other-model' }).toThrow(TypeError)
|
|
return { ...config, model: 'other-model' }
|
|
})
|
|
|
|
send(agent, 'hi')
|
|
await waitForIdle(ctx, agent)
|
|
expect(adapter.requests[0]!.model).toBe('other-model')
|
|
// The header event records what the request ACTUALLY used — the switch is
|
|
// a reconstructable fact, not silent drift.
|
|
const headerEvent = agent.session.events.find(e => e.type === 'request/header')
|
|
expect(headerEvent?.type === 'request/header' && headerEvent.data.header.config.model).toBe('other-model')
|
|
})
|
|
|
|
it('agent/pre-step fires once per step before the step is opened', async () => {
|
|
// Two steps (a tool call, then a final text turn) → two model calls → two
|
|
// pre-step fires, each carrying the assembled full system prompt, BEFORE
|
|
// the step is opened and its request is derived (the request the adapter
|
|
// sees reflects any surface state at fire time).
|
|
const adapter = new MockAdapter([
|
|
toolCallResponse('c1', 'echo', {}, 'calling echo'),
|
|
textResponse('done'),
|
|
])
|
|
const ctx = await harness(adapter)
|
|
ctx.tools.register(defineTool({
|
|
name: 'echo', description: 'echo', parameters: {},
|
|
async execute() { return [{ type: 'text', text: 'echoed' }] },
|
|
}))
|
|
const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
|
|
|
|
const fires: { turn: number; step: number; fullSystemPrompt: string }[] = []
|
|
ctx.on('agent/pre-step', (subject, turn, step, fullSystemPrompt) => {
|
|
if (subject === agent) fires.push({ turn, step, fullSystemPrompt })
|
|
})
|
|
|
|
send(agent, 'go')
|
|
await waitForIdle(ctx, agent)
|
|
|
|
// One fire per step, in order, each with the assembled system prompt
|
|
// (here just the loop's own harness-identity section — no persona set).
|
|
const HARNESS = 'You are an AI agent powered by the DeepSeek Harness SDK.'
|
|
expect(fires).toEqual([
|
|
{ turn: 1, step: 1, fullSystemPrompt: HARNESS },
|
|
{ turn: 1, step: 2, fullSystemPrompt: HARNESS },
|
|
])
|
|
})
|
|
|
|
it('agent/pre-step fires BEFORE the step it precedes opens (events land outside the step)', async () => {
|
|
// A listener appending a surface node in pre-step lands it before step/start in the log —
|
|
// proving the seam fires outside the step.
|
|
const adapter = new MockAdapter([textResponse('ok')])
|
|
const ctx = await harness(adapter)
|
|
const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
|
|
|
|
let injected = false
|
|
ctx.on('agent/pre-step', (subject) => {
|
|
if (subject === agent && !injected) {
|
|
injected = true
|
|
subject.session.append('context/message', {
|
|
content: [{ type: 'text', text: 'INJECTED-IN-PRE-STEP' }],
|
|
source: { kind: 'plugin', plugin: 'test' },
|
|
}, { surfaceOp: 'append' })
|
|
}
|
|
})
|
|
|
|
send(agent, 'go')
|
|
await waitForIdle(ctx, agent)
|
|
|
|
// The adapter's request includes the node injected during pre-step (derive
|
|
// reflects it).
|
|
const text = JSON.stringify(adapter.requests[0]!.messages)
|
|
expect(text).toContain('INJECTED-IN-PRE-STEP')
|
|
|
|
// And the injected event sits BEFORE the first step/start in the log —
|
|
// the seam fired outside the step.
|
|
const events = agent.session.events
|
|
const injectedSeq = events.find(e => e.type === 'context/message')!.seq
|
|
const firstStepStartSeq = events.find(e => e.type === 'step/start')!.seq
|
|
expect(injectedSeq).toBeLessThan(firstStepStartSeq)
|
|
})
|
|
|
|
it('a throwing agent/pre-step listener ends the turn (error), not the loop', async () => {
|
|
// The seam fires before step/start, so a throw escapes to runTurn's outer catch: the
|
|
// not-yet-open step closes as a no-op, the failure surfaces via agent/error, and the turn
|
|
// ends `error` (recorded on the durable turn/end).
|
|
const adapter = new MockAdapter([textResponse('second turn ok')])
|
|
const ctx = await harness(adapter)
|
|
const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
|
|
|
|
let throwOnce = true
|
|
ctx.on('agent/pre-step', () => {
|
|
if (throwOnce) { throwOnce = false; throw new Error('boom in pre-step') }
|
|
})
|
|
|
|
const errors: Error[] = []
|
|
ctx.on('agent/error', (_a, _t, _s, error) => void errors.push(error))
|
|
|
|
send(agent, 'first')
|
|
await waitForIdle(ctx, agent)
|
|
// The first turn failed at step 1 (no model call happened), surfaced via
|
|
// agent/error, with the durable failure on turn/end.reason.
|
|
expect(errors).toHaveLength(1)
|
|
expect(errors[0]!.message).toContain('boom in pre-step')
|
|
expect(adapter.requests.length).toBe(0)
|
|
const firstTurnEnd = agent.session.events.find(e => e.type === 'turn/end')
|
|
expect(firstTurnEnd?.type === 'turn/end' && firstTurnEnd.data.reason).toMatchObject({ kind: 'error', step: 1 })
|
|
// The step opened-and-closed count stays balanced even though it never ran.
|
|
const types = agent.session.events.map(e => e.type)
|
|
expect(types.filter(t => t === 'step/start').length).toBe(types.filter(t => t === 'step/end').length)
|
|
|
|
// The loop survived: a second prompt runs a normal completed turn.
|
|
send(agent, 'second')
|
|
await waitForIdle(ctx, agent)
|
|
expect(adapter.requests.length).toBe(1)
|
|
const lastTurnEnd = agent.session.events.findLast(e => e.type === 'turn/end')
|
|
expect(lastTurnEnd?.type === 'turn/end' && lastTurnEnd.data.reason).toEqual({ kind: 'completed' })
|
|
})
|
|
|
|
it('cancel() mid-stream ends the turn with reason aborted', async () => {
|
|
const adapter = new MockAdapter(['hang'])
|
|
const ctx = await harness(adapter)
|
|
const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
|
|
|
|
const reasons: TurnEndReason[] = []
|
|
ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) })
|
|
|
|
send(agent, 'go')
|
|
// wait until the stream is hanging, then cancel
|
|
await new Promise(r => setTimeout(r, 30))
|
|
expect(agent.status).toBe('running')
|
|
agent.cancel('user interrupt')
|
|
await waitForIdle(ctx, agent)
|
|
|
|
expect(reasons).toEqual([{ kind: 'aborted', reason: 'user interrupt' }])
|
|
})
|
|
|
|
it('surfaces max-tokens as the turn-end reason when the last step is cut off', async () => {
|
|
// A single step that ends with a max-tokens finish (no tool calls): the
|
|
// turn stops by default and ends max-tokens, not completed.
|
|
const adapter = new MockAdapter([maxTokensResponse('truncat')])
|
|
const ctx = await harness(adapter)
|
|
const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
|
|
|
|
const reasons: TurnEndReason[] = []
|
|
ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) })
|
|
|
|
send(agent, 'go')
|
|
await waitForIdle(ctx, agent)
|
|
|
|
expect(adapter.requests).toHaveLength(1)
|
|
expect(reasons).toEqual([{ kind: 'max-tokens' }])
|
|
// and the reason is recorded in the log's turn/end event
|
|
const turnEnd = agent.session.events.findLast(e => e.type === 'turn/end')
|
|
expect(turnEnd!.data.reason).toEqual({ kind: 'max-tokens' })
|
|
})
|
|
|
|
it('a max-tokens step earlier in a turn still surfaces as max-tokens after a later completed step', async () => {
|
|
// Step 1 is cut off (max-tokens, no tool calls → would stop by default), so continuation
|
|
// must be FORCED to reach step 2 which finishes normally (stop).
|
|
const adapter = new MockAdapter([
|
|
maxTokensResponse('first half'),
|
|
textResponse('second half'),
|
|
])
|
|
const ctx = await harness(adapter)
|
|
const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
|
|
|
|
let steps = 0
|
|
ctx.on('session/event', (_session, event) => { if (event.type === 'step/end') steps++ })
|
|
// Force exactly one continuation (step 1 → step 2), then defer to default
|
|
// (step 2 is a plain stop with no tool calls → stops).
|
|
ctx.on('agent/turn-continuation', async (_agent, _turn, _defaultDecision, next) => {
|
|
if (steps < 2) return { action: 'continue' as const }
|
|
return next()
|
|
})
|
|
|
|
const reasons: TurnEndReason[] = []
|
|
ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) })
|
|
|
|
send(agent, 'go')
|
|
await waitForIdle(ctx, agent)
|
|
|
|
expect(steps).toBe(2)
|
|
expect(adapter.requests).toHaveLength(2)
|
|
expect(adapter.requests[1]!.messages).toEqual([
|
|
{ role: 'user', content: [{ type: 'text', text: 'go' }] },
|
|
{ role: 'assistant', content: [{ type: 'text', text: 'first half' }] },
|
|
])
|
|
expect(reasons).toEqual([{ kind: 'max-tokens' }])
|
|
})
|
|
|
|
it('a completed step after no max-tokens keeps the turn completed (max-tokens does not leak across turns)', async () => {
|
|
// Two consecutive turns: turn 1 is cut off (max-tokens), turn 2 is a clean
|
|
// stop. The per-turn reason must be independent — turn 2 ends completed.
|
|
const adapter = new MockAdapter([maxTokensResponse('cut'), textResponse('clean')])
|
|
const ctx = await harness(adapter)
|
|
const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
|
|
|
|
const reasons: TurnEndReason[] = []
|
|
ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) })
|
|
|
|
send(agent, 'first')
|
|
await waitForIdle(ctx, agent)
|
|
send(agent, 'second')
|
|
await waitForIdle(ctx, agent)
|
|
|
|
expect(reasons).toEqual([{ kind: 'max-tokens' }, { kind: 'completed' }])
|
|
})
|
|
|
|
it('does not dispatch tool calls from a max-tokens-truncated step', async () => {
|
|
const callId = CallId('c1')
|
|
const adapter = new MockAdapter([[
|
|
{ type: 'block-start', index: 0, blockType: 'tool-call' },
|
|
{ type: 'tool-call-delta', index: 0, id: callId, name: 'echo', argumentsDelta: '{"text":"x"}' },
|
|
{ type: 'block-end', index: 0, block: { type: 'tool-call', id: callId, name: 'echo', arguments: '{"text":"x"}' } },
|
|
{ type: 'usage', usage: { inputTokens: 10, outputTokens: 5 } },
|
|
{ type: 'finish', reason: { kind: 'max-tokens' } },
|
|
]])
|
|
const ctx = await harness(adapter)
|
|
let executions = 0
|
|
ctx.tools.register(defineTool({
|
|
name: 'echo',
|
|
description: '',
|
|
parameters: { text: { type: 'string' } },
|
|
async execute() {
|
|
executions += 1
|
|
return [{ type: 'text', text: 'should not run' }]
|
|
},
|
|
}))
|
|
const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
|
|
|
|
const reasons: TurnEndReason[] = []
|
|
ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) })
|
|
|
|
send(agent, 'go')
|
|
await waitForIdle(ctx, agent)
|
|
|
|
expect(executions).toBe(0)
|
|
expect(agent.session.events.some(e => e.type === 'tool/call')).toBe(false)
|
|
expect(agent.session.deriveMessages()).toEqual([{ role: 'user', content: [{ type: 'text', text: 'go' }] }])
|
|
expect(reasons).toEqual([{ kind: 'max-tokens' }])
|
|
// No-data-loss: a max-tokens step whose only content was a dropped tool call has EMPTY
|
|
// assistant content, but its usage must still be represented.
|
|
const assistantMessage = agent.session.events.find(e => e.type === 'assistant/message')
|
|
expect(assistantMessage?.type === 'assistant/message' && assistantMessage.data).toEqual({
|
|
turn: 1, step: 1, content: [], usage: { inputTokens: 10, outputTokens: 5 },
|
|
})
|
|
})
|
|
|
|
it('appends no assistant/message for a max-tokens step with empty content and no usage', async () => {
|
|
// A max-tokens step truncated to a dropped tool call AND with no usage chunk has nothing to
|
|
// record: empty content and no accounting → no assistant/message (the empty-content host
|
|
// exists only to carry usage).
|
|
const callId = CallId('c1')
|
|
const adapter = new MockAdapter([[
|
|
{ type: 'block-start', index: 0, blockType: 'tool-call' },
|
|
{ type: 'tool-call-delta', index: 0, id: callId, name: 'echo', argumentsDelta: '{"text":"x"}' },
|
|
{ type: 'block-end', index: 0, block: { type: 'tool-call', id: callId, name: 'echo', arguments: '{"text":"x"}' } },
|
|
{ type: 'finish', reason: { kind: 'max-tokens' } },
|
|
]])
|
|
const ctx = await harness(adapter)
|
|
ctx.tools.register(defineTool({
|
|
name: 'echo',
|
|
description: '',
|
|
parameters: { text: { type: 'string' } },
|
|
async execute() { return [{ type: 'text', text: 'should not run' }] },
|
|
}))
|
|
const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
|
|
|
|
const reasons: TurnEndReason[] = []
|
|
ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) })
|
|
|
|
send(agent, 'go')
|
|
await waitForIdle(ctx, agent)
|
|
|
|
expect(reasons).toEqual([{ kind: 'max-tokens' }])
|
|
expect(agent.session.events.some(e => e.type === 'assistant/message')).toBe(false)
|
|
expect(agent.session.deriveMessages()).toEqual([{ role: 'user', content: [{ type: 'text', text: 'go' }] }])
|
|
})
|
|
|
|
it('appends no assistant/message for a normal stop finish with empty content and no usage', async () => {
|
|
// A clean `stop` finish that streamed nothing assembled (no blocks) and
|
|
// carried no usage chunk has nothing to record: the content-or-usage guard
|
|
// on the normal step path suppresses a pure trace-only empty assistant/message.
|
|
const adapter = new MockAdapter([[{ type: 'finish', reason: { kind: 'stop' } }]])
|
|
const ctx = await harness(adapter)
|
|
const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
|
|
|
|
const reasons: TurnEndReason[] = []
|
|
ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) })
|
|
|
|
send(agent, 'go')
|
|
await waitForIdle(ctx, agent)
|
|
|
|
expect(reasons).toEqual([{ kind: 'completed' }])
|
|
expect(agent.session.events.some(e => e.type === 'assistant/message')).toBe(false)
|
|
expect(agent.session.deriveMessages()).toEqual([{ role: 'user', content: [{ type: 'text', text: 'go' }] }])
|
|
})
|
|
|
|
it('keeps safe max-tokens assistant content while dropping truncated tool calls', async () => {
|
|
const callId = CallId('c1')
|
|
const adapter = new MockAdapter([[
|
|
{ type: 'block-start', index: 0, blockType: 'text' },
|
|
{ type: 'text-delta', index: 0, text: 'partial text' },
|
|
{ type: 'block-end', index: 0, block: { type: 'text', text: 'partial text' } },
|
|
{ type: 'block-start', index: 1, blockType: 'tool-call' },
|
|
{ type: 'tool-call-delta', index: 1, id: callId, name: 'echo', argumentsDelta: '{"text"' },
|
|
{ type: 'finish', reason: { kind: 'max-tokens' } },
|
|
]])
|
|
const ctx = await harness(adapter)
|
|
let stepResults = 0
|
|
ctx.on('agent/step-result', async (_agent, _turn, _step, message, next) => {
|
|
stepResults += 1
|
|
expect(message.content).toEqual([{ type: 'text', text: 'partial text' }])
|
|
return next()
|
|
})
|
|
const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
|
|
|
|
send(agent, 'go')
|
|
await waitForIdle(ctx, agent)
|
|
|
|
expect(stepResults).toBe(1)
|
|
expect(agent.session.events.some(e => e.type === 'tool/call')).toBe(false)
|
|
expect(agent.session.deriveMessages()).toEqual([
|
|
{ role: 'user', content: [{ type: 'text', text: 'go' }] },
|
|
{ role: 'assistant', content: [{ type: 'text', text: 'partial text' }] },
|
|
])
|
|
})
|
|
|
|
it('stops the turn when a step/end session-event listener failure has recorded an error', async () => {
|
|
const adapter = new MockAdapter([
|
|
toolCallResponse('c1', 'echo', { text: 'x' }),
|
|
textResponse('should not run'),
|
|
])
|
|
const ctx = await harness(adapter)
|
|
ctx.tools.register(defineTool({
|
|
name: 'echo',
|
|
description: '',
|
|
parameters: { text: { type: 'string' } },
|
|
async execute(args) {
|
|
return [{ type: 'text', text: String(args.text) }]
|
|
},
|
|
}))
|
|
const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
|
|
let threw = false
|
|
// A throwing step/end session-event listener is the surviving boundary-listener
|
|
// failure path (step boundaries have no agent/* mirror): closeStep contains it
|
|
// and surfaces it as a turn error rather than stranding the turn open.
|
|
ctx.on('session/event', (_session, event) => {
|
|
if (event.type === 'step/end' && !threw) { threw = true; throw new Error('bad step/end listener') }
|
|
})
|
|
|
|
send(agent, 'go')
|
|
await waitForIdle(ctx, agent)
|
|
|
|
expect(adapter.requests).toHaveLength(1)
|
|
const turnEnd = agent.session.events.findLast(e => e.type === 'turn/end')
|
|
expect(turnEnd?.type === 'turn/end' && turnEnd.data.reason.kind).toBe('error')
|
|
})
|
|
|
|
it('chains queued messages into consecutive turns', async () => {
|
|
const adapter = new MockAdapter([textResponse('first'), textResponse('second')])
|
|
const ctx = await harness(adapter)
|
|
const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
|
|
|
|
const turns: number[] = []
|
|
ctx.on('session/event', (_s, event) => { if (event.type === 'turn/start') turns.push(event.data.turn) })
|
|
|
|
// queue two messages while idle — first starts turn 1 immediately;
|
|
// queue the second during turn 1 when the first assistant chunk streams
|
|
let queued = false
|
|
ctx.on('session/event', (_s, event) => {
|
|
if (event.type === 'assistant/chunk' && !queued) {
|
|
queued = true
|
|
send(agent, 'second message')
|
|
}
|
|
})
|
|
|
|
send(agent, 'first message')
|
|
await waitForIdle(ctx, agent)
|
|
|
|
expect(turns).toEqual([1, 2])
|
|
expect(adapter.requests).toHaveLength(2)
|
|
})
|
|
|
|
it('awaits session/flush at turn end (persistence checkpoint)', async () => {
|
|
const adapter = new MockAdapter([textResponse('ok')])
|
|
const ctx = await harness(adapter)
|
|
const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
|
|
|
|
let flushed = 0
|
|
let flushedBeforeIdle = false
|
|
ctx.on('session/flush', async (session) => {
|
|
await new Promise(r => setTimeout(r, 10))
|
|
flushed++
|
|
flushedBeforeIdle = agent.status !== 'idle'
|
|
void session
|
|
})
|
|
|
|
send(agent, 'hi')
|
|
await waitForIdle(ctx, agent)
|
|
expect(flushed).toBe(1)
|
|
expect(flushedBeforeIdle).toBe(true)
|
|
})
|
|
|
|
it('errors from the model surface as agent/error and end the turn', async () => {
|
|
const adapter = new MockAdapter([]) // script exhausted → throws
|
|
const ctx = await harness(adapter)
|
|
const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
|
|
|
|
const errors: Error[] = []
|
|
const reasons: TurnEndReason[] = []
|
|
ctx.on('agent/error', (_agent, _turn, _step, error) => void errors.push(error))
|
|
ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) })
|
|
|
|
send(agent, 'hi')
|
|
await waitForIdle(ctx, agent)
|
|
|
|
expect(errors).toHaveLength(1)
|
|
expect(errors[0]!.message).toContain('script exhausted')
|
|
expect(reasons[0]).toMatchObject({ kind: 'error' })
|
|
// The durable failure lives entirely on turn/end.reason (with the failing
|
|
// step), not a standalone error event.
|
|
const turnEnd = agent.session.events.find(e => e.type === 'turn/end')
|
|
expect(turnEnd?.type === 'turn/end' && turnEnd.data.reason).toMatchObject({ kind: 'error', step: 1 })
|
|
})
|
|
|
|
it('disposing the loop fiber mid-turn stops the loop (HMR safety)', async () => {
|
|
const adapter = new MockAdapter(['hang'])
|
|
const ctx = await harness(adapter)
|
|
|
|
let agent!: ReactLoopAgent
|
|
const fiber = await ctx.plugin(Object.assign((inner: Context) => {
|
|
agent = inner.agentLoop.create(AgentId('scoped'), { model: 'mock' })
|
|
}, { inject: ['agentLoop'] }))
|
|
|
|
expect(ctx.agents.get(AgentId('scoped'))).toBe(agent)
|
|
send(agent, 'go')
|
|
await new Promise(r => setTimeout(r, 30))
|
|
expect(agent.status).toBe('running')
|
|
|
|
await fiber.dispose()
|
|
await agent.done
|
|
|
|
expect(agent.status).toBe('disposed')
|
|
expect(ctx.agents.get(AgentId('scoped'))).toBeUndefined()
|
|
expect(() => { send(agent, 'too late') }).toThrow('disposed')
|
|
})
|
|
|
|
it('creates agents from config on startup', async () => {
|
|
const adapter = new MockAdapter([textResponse('from config')])
|
|
const ctx = new Context()
|
|
await ctx.plugin(LlmService)
|
|
await ctx.plugin(SessionStore)
|
|
await ctx.plugin(SystemPrompt)
|
|
await ctx.plugin(ToolRegistry)
|
|
await ctx.plugin(AgentRegistry)
|
|
await ctx.plugin(AgentLoop, {
|
|
agents: [{ id: AgentId('config-agent'), model: 'mock' }],
|
|
})
|
|
ctx.llm.registerAdapter(['mock'], adapter)
|
|
|
|
const agent = ctx.agents.get(AgentId('config-agent'))! as ReactLoopAgent
|
|
expect(agent).toBeDefined()
|
|
expect(agent.id).toBe('config-agent')
|
|
expect(agent.options.model).toBe('mock')
|
|
|
|
// the agent is alive: send triggers a turn
|
|
send(agent, 'hi')
|
|
await waitForIdle(ctx, agent)
|
|
expect(adapter.requests).toHaveLength(1)
|
|
})
|
|
|
|
it('attaches config agent cwd to the fresh session header', async () => {
|
|
const ctx = new Context()
|
|
await ctx.plugin(LlmService)
|
|
await ctx.plugin(SessionStore)
|
|
await ctx.plugin(SystemPrompt)
|
|
await ctx.plugin(ToolRegistry)
|
|
await ctx.plugin(AgentRegistry)
|
|
await ctx.plugin(AgentLoop, {
|
|
agents: [{ id: AgentId('config-agent'), model: 'mock', cwd: '/work/project' }],
|
|
})
|
|
|
|
const agent = ctx.agents.get(AgentId('config-agent'))! as ReactLoopAgent
|
|
expect(agent.session.header.cwd).toBe('/work/project')
|
|
})
|
|
|
|
it('replays a session log into an identical derived history', async () => {
|
|
const adapter = new MockAdapter([
|
|
toolCallResponse('c1', 'echo', { text: 'x' }),
|
|
textResponse('done'),
|
|
])
|
|
const ctx = await harness(adapter)
|
|
ctx.tools.register(defineTool({
|
|
name: 'echo',
|
|
description: '',
|
|
parameters: { text: { type: 'string' } },
|
|
async execute(args) {
|
|
return [{ type: 'text', text: String(args.text) }]
|
|
},
|
|
}))
|
|
const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' })
|
|
send(agent, 'run')
|
|
await waitForIdle(ctx, agent)
|
|
|
|
const replayed = ctx.sessions.create(SessionId('replayed'), { seed: [...agent.session.events] })
|
|
expect(replayed.deriveMessages()).toEqual(agent.session.deriveMessages())
|
|
// event-by-event identity of types
|
|
expect(replayed.events.map(e => e.type)).toEqual(
|
|
agent.session.events.map(e => e.type))
|
|
})
|
|
})
|