mirror of
https://github.com/deepseek-ai/deepseek-harness
synced 2026-08-15 21:04:50 +00:00
d2fb352f3e
tsconfig.base.json adds noUncheckedIndexedAccess, exactOptionalPropertyTypes, noImplicitOverride, noFallthroughCasesInSwitch, noUnusedLocals, and noUnusedParameters on top of strict. Vendored packages opt out of the new flags locally (their tsconfigs are ours to regenerate; their source is not), keeping upstream-sync friendliness. Our code fixed accordingly: index accesses acknowledge undefined (assembler flush cursors, lastTurnNumber); optional properties are omitted instead of set-to-undefined (GenerateResult.usage, ToolDefinition.strict, GenerateOptions.system/tools, error payloads via an errorData helper); Session.onAppend is explicitly `(…) => void | undefined`; tests and examples updated for unused parameters and indexed access.
411 lines
15 KiB
TypeScript
411 lines
15 KiB
TypeScript
import { describe, expect, it } from 'vitest'
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import { Context } from 'cordis'
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import LlmService, { StreamChunk, ToolResultBlock } from '@deepseek-ai/dsh-llm'
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import SessionStore, { SessionEventType, 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 from '@deepseek-ai/dsh-agent'
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import AgentLoop, { LoopAgent } from '@deepseek-ai/dsh-agent-loop'
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import { MockAdapter, textResponse, toolCallResponse } from './mock-adapter.ts'
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async function harness(adapter: MockAdapter) {
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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)
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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: LoopAgent): 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: LoopAgent, 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('a1', { model: 'mock' })
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const order: string[] = []
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for (const name of ['agent/turn-start', 'agent/step-start', 'agent/step-end', 'agent/turn-end'] as const) {
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ctx.on(name, () => void order.push(name))
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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(['agent/turn-start', 'agent/step-start', 'agent/step-end', 'agent/turn-end'])
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const types = agent.session.events.map(e => e.type)
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// user message recorded before turn/start, assembled message + usage present
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expect(types[0]).toBe('user/message')
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expect(types[1]).toBe('turn/start')
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expect(types).toContain('assistant/message')
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expect(types).toContain('usage')
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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('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 as ToolResultBlock).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('passes assembled system prompt and tool schemas into the 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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ctx.systemPrompt.section({ name: 'persona', order: 0, text: 'You are a test agent.' })
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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('a1', { model: 'mock', systemPrompt: 'Agent-specific suffix.' })
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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 a test agent.\n\nAgent-specific suffix.')
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expect(request!.tools?.map(t => t.name)).toEqual(['noop'])
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})
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it('records raw chunks for replay and emits agent/stream-chunk', 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('a1', { model: 'mock' })
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const streamed: StreamChunk[] = []
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ctx.on('agent/stream-chunk', (_agent, _turn, _step, chunk) => void streamed.push(chunk))
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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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expect(streamed).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('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('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() appends context visible to the next request without starting 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('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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// no turn started
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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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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('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)
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const agent = ctx.agentLoop.create('a1', { model: 'mock' })
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let steps = 0
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ctx.on('agent/step-end', () => void steps++)
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ctx.on('agent/turn-continuation', async (_agent, _turn, _defaultDecision, next) => {
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if (steps < 3) return true
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return next()
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})
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send(agent, 'go')
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await waitForIdle(ctx, agent)
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expect(steps).toBe(3)
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expect(adapter.requests).toHaveLength(3)
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})
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it('agent/turn-continuation can veto continuation despite tool calls (budget-guard pattern)', async () => {
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const adapter = new MockAdapter([toolCallResponse('c1', 'echo', { text: 'x' })])
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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: '',
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parameters: { text: { type: 'string' } },
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async execute(args) {
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return [{ type: 'text', text: String(args.text) }]
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},
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}))
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const agent = ctx.agentLoop.create('a1', { model: 'mock' })
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ctx.on('agent/turn-continuation', async () => false as const)
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send(agent, 'go')
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await waitForIdle(ctx, agent)
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// only one model call despite the tool call requesting a follow-up
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expect(adapter.requests).toHaveLength(1)
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// tool still executed before the decision
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expect(agent.session.events.some(e => e.type === 'tool/result')).toBe(true)
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})
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it('agent/request waterfall can rewrite the request (model-switch pattern)', async () => {
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const adapter = new MockAdapter([textResponse('ok')])
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const ctx = await harness(adapter)
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ctx.llm.registerAdapter(['other-model'], adapter)
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const agent = ctx.agentLoop.create('a1', { model: 'mock' })
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ctx.on('agent/request', async (_agent, _turn, _step, options, next) => {
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options.model = 'other-model'
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return next()
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})
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send(agent, 'hi')
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await waitForIdle(ctx, agent)
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expect(adapter.requests[0]!.model).toBe('other-model')
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})
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it('abort() mid-stream ends the turn with reason aborted', async () => {
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const adapter = new MockAdapter(['hang'])
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const ctx = await harness(adapter)
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const agent = ctx.agentLoop.create('a1', { model: 'mock' })
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const reasons: TurnEndReason[] = []
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ctx.on('agent/turn-end', (_agent, _turn, reason) => void reasons.push(reason))
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send(agent, 'go')
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// wait until the stream is hanging, then abort
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await new Promise(r => setTimeout(r, 30))
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expect(agent.status).toBe('running')
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agent.abort('user interrupt')
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await waitForIdle(ctx, agent)
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expect(reasons).toEqual([{ kind: 'aborted', reason: 'user interrupt' }])
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})
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it('chains queued messages into consecutive turns', async () => {
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const adapter = new MockAdapter([textResponse('first'), textResponse('second')])
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const ctx = await harness(adapter)
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const agent = ctx.agentLoop.create('a1', { model: 'mock' })
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const turns: number[] = []
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ctx.on('agent/turn-start', (_agent, turn) => void turns.push(turn))
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// queue two messages while idle — first starts turn 1 immediately;
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// queue the second during turn 1 via a stream-chunk hook
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let queued = false
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ctx.on('agent/stream-chunk', () => {
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if (!queued) {
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queued = true
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send(agent, 'second message')
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}
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})
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send(agent, 'first message')
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await waitForIdle(ctx, agent)
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expect(turns).toEqual([1, 2])
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expect(adapter.requests).toHaveLength(2)
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})
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it('awaits session/flush at turn end (persistence checkpoint)', 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('a1', { model: 'mock' })
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let flushed = 0
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let flushedBeforeIdle = false
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ctx.on('session/flush', async (session) => {
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await new Promise(r => setTimeout(r, 10))
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flushed++
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flushedBeforeIdle = agent.status !== 'idle'
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void session
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})
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send(agent, 'hi')
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await waitForIdle(ctx, agent)
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expect(flushed).toBe(1)
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expect(flushedBeforeIdle).toBe(true)
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})
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it('errors from the model surface as agent/error and end the turn', async () => {
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const adapter = new MockAdapter([]) // script exhausted → throws
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const ctx = await harness(adapter)
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const agent = ctx.agentLoop.create('a1', { model: 'mock' })
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const errors: Error[] = []
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const reasons: TurnEndReason[] = []
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ctx.on('agent/error', (_agent, _turn, _step, error) => void errors.push(error))
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ctx.on('agent/turn-end', (_agent, _turn, reason) => void reasons.push(reason))
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send(agent, 'hi')
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await waitForIdle(ctx, agent)
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expect(errors).toHaveLength(1)
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expect(errors[0]!.message).toContain('script exhausted')
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expect(reasons[0]).toMatchObject({ kind: 'error' })
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expect(agent.session.events.some(e => e.type === 'error')).toBe(true)
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})
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it('disposing the loop fiber mid-turn stops the loop (HMR safety)', async () => {
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const adapter = new MockAdapter(['hang'])
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const ctx = await harness(adapter)
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let agent!: LoopAgent
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const fiber = await ctx.plugin(Object.assign((inner: Context) => {
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agent = inner.agentLoop.create('scoped', { model: 'mock' })
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}, { inject: ['agentLoop'] }))
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expect(ctx.agents.get('scoped')).toBe(agent)
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send(agent, 'go')
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await new Promise(r => setTimeout(r, 30))
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expect(agent.status).toBe('running')
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await fiber.dispose()
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await agent.done
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expect(agent.status).toBe('disposed')
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expect(ctx.agents.get('scoped')).toBeUndefined()
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expect(() => send(agent, 'too late')).toThrow('disposed')
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})
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it('replays a session log into an identical derived history', async () => {
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const adapter = new MockAdapter([
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toolCallResponse('c1', 'echo', { text: 'x' }),
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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: '',
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parameters: { text: { type: 'string' } },
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async execute(args) {
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return [{ type: 'text', text: String(args.text) }]
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},
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}))
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const agent = ctx.agentLoop.create('a1', { model: 'mock' })
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send(agent, 'run')
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await waitForIdle(ctx, agent)
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const replayed = ctx.sessions.create('replayed', [...agent.session.events])
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expect(replayed.deriveMessages()).toEqual(agent.session.deriveMessages())
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// event-by-event identity of types
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expect(replayed.events.map(e => e.type)).toEqual(
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agent.session.events.map(e => e.type as SessionEventType))
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})
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})
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