chore: initialize qiming workspace repository

qimingcode/packages/opencode/test/lib/llm-server.ts

@@ -0,0 +1,771 @@
+import { NodeHttpServer, NodeHttpServerRequest } from "@effect/platform-node"
+import * as Http from "node:http"
+import { Deferred, Effect, Layer, Context, Stream } from "effect"
+import * as HttpServer from "effect/unstable/http/HttpServer"
+import { HttpRouter, HttpServerRequest, HttpServerResponse } from "effect/unstable/http"
+
+export type Usage = { input: number; output: number }
+
+type Line = Record<string, unknown>
+
+type Flow =
+  | { type: "text"; text: string }
+  | { type: "reason"; text: string }
+  | { type: "tool-start"; id: string; name: string }
+  | { type: "tool-args"; text: string }
+  | { type: "usage"; usage: Usage }
+
+type Hit = {
+  url: URL
+  body: Record<string, unknown>
+}
+
+type Match = (hit: Hit) => boolean
+
+type Queue = {
+  item: Item
+  match?: Match
+}
+
+type Wait = {
+  count: number
+  ready: Deferred.Deferred<void>
+}
+
+type Sse = {
+  type: "sse"
+  head: unknown[]
+  tail: unknown[]
+  wait?: PromiseLike<unknown>
+  hang?: boolean
+  error?: unknown
+  reset?: boolean
+}
+
+type HttpError = {
+  type: "http-error"
+  status: number
+  body: unknown
+}
+
+export type Item = Sse | HttpError
+
+const done = Symbol("done")
+
+function line(input: unknown) {
+  if (input === done) return "data: [DONE]\n\n"
+  return `data: ${JSON.stringify(input)}\n\n`
+}
+
+function tokens(input?: Usage) {
+  if (!input) return
+  return {
+    prompt_tokens: input.input,
+    completion_tokens: input.output,
+    total_tokens: input.input + input.output,
+  }
+}
+
+function chunk(input: { delta?: Record<string, unknown>; finish?: string; usage?: Usage }) {
+  return {
+    id: "chatcmpl-test",
+    object: "chat.completion.chunk",
+    choices: [
+      {
+        delta: input.delta ?? {},
+        ...(input.finish ? { finish_reason: input.finish } : {}),
+      },
+    ],
+    ...(input.usage ? { usage: tokens(input.usage) } : {}),
+  } satisfies Line
+}
+
+function role() {
+  return chunk({ delta: { role: "assistant" } })
+}
+
+function textLine(value: string) {
+  return chunk({ delta: { content: value } })
+}
+
+function reasonLine(value: string) {
+  return chunk({ delta: { reasoning_content: value } })
+}
+
+function finishLine(reason: string, usage?: Usage) {
+  return chunk({ finish: reason, usage })
+}
+
+function toolStartLine(id: string, name: string) {
+  return chunk({
+    delta: {
+      tool_calls: [
+        {
+          index: 0,
+          id,
+          type: "function",
+          function: {
+            name,
+            arguments: "",
+          },
+        },
+      ],
+    },
+  })
+}
+
+function toolArgsLine(value: string) {
+  return chunk({
+    delta: {
+      tool_calls: [
+        {
+          index: 0,
+          function: {
+            arguments: value,
+          },
+        },
+      ],
+    },
+  })
+}
+
+function bytes(input: Iterable<unknown>) {
+  return Stream.fromIterable([...input].map(line)).pipe(Stream.encodeText)
+}
+
+function responseCreated(model: string) {
+  return {
+    type: "response.created",
+    sequence_number: 1,
+    response: {
+      id: "resp_test",
+      created_at: Math.floor(Date.now() / 1000),
+      model,
+      service_tier: null,
+    },
+  }
+}
+
+function responseCompleted(input: { seq: number; usage?: Usage }) {
+  return {
+    type: "response.completed",
+    sequence_number: input.seq,
+    response: {
+      incomplete_details: null,
+      service_tier: null,
+      usage: {
+        input_tokens: input.usage?.input ?? 0,
+        input_tokens_details: { cached_tokens: null },
+        output_tokens: input.usage?.output ?? 0,
+        output_tokens_details: { reasoning_tokens: null },
+      },
+    },
+  }
+}
+
+function responseMessage(id: string, seq: number) {
+  return {
+    type: "response.output_item.added",
+    sequence_number: seq,
+    output_index: 0,
+    item: { type: "message", id },
+  }
+}
+
+function responseText(id: string, text: string, seq: number) {
+  return {
+    type: "response.output_text.delta",
+    sequence_number: seq,
+    item_id: id,
+    delta: text,
+    logprobs: null,
+  }
+}
+
+function responseMessageDone(id: string, seq: number) {
+  return {
+    type: "response.output_item.done",
+    sequence_number: seq,
+    output_index: 0,
+    item: { type: "message", id },
+  }
+}
+
+function responseReason(id: string, seq: number) {
+  return {
+    type: "response.output_item.added",
+    sequence_number: seq,
+    output_index: 0,
+    item: { type: "reasoning", id, encrypted_content: null },
+  }
+}
+
+function responseReasonPart(id: string, seq: number) {
+  return {
+    type: "response.reasoning_summary_part.added",
+    sequence_number: seq,
+    item_id: id,
+    summary_index: 0,
+  }
+}
+
+function responseReasonText(id: string, text: string, seq: number) {
+  return {
+    type: "response.reasoning_summary_text.delta",
+    sequence_number: seq,
+    item_id: id,
+    summary_index: 0,
+    delta: text,
+  }
+}
+
+function responseReasonDone(id: string, seq: number) {
+  return {
+    type: "response.output_item.done",
+    sequence_number: seq,
+    output_index: 0,
+    item: { type: "reasoning", id, encrypted_content: null },
+  }
+}
+
+function responseTool(id: string, item: string, name: string, seq: number) {
+  return {
+    type: "response.output_item.added",
+    sequence_number: seq,
+    output_index: 0,
+    item: {
+      type: "function_call",
+      id: item,
+      call_id: id,
+      name,
+      arguments: "",
+      status: "in_progress",
+    },
+  }
+}
+
+function responseToolArgs(id: string, text: string, seq: number) {
+  return {
+    type: "response.function_call_arguments.delta",
+    sequence_number: seq,
+    output_index: 0,
+    item_id: id,
+    delta: text,
+  }
+}
+
+function responseToolArgsDone(id: string, args: string, seq: number) {
+  return {
+    type: "response.function_call_arguments.done",
+    sequence_number: seq,
+    output_index: 0,
+    item_id: id,
+    arguments: args,
+  }
+}
+
+function responseToolDone(tool: { id: string; item: string; name: string; args: string }, seq: number) {
+  return {
+    type: "response.output_item.done",
+    sequence_number: seq,
+    output_index: 0,
+    item: {
+      type: "function_call",
+      id: tool.item,
+      call_id: tool.id,
+      name: tool.name,
+      arguments: tool.args,
+      status: "completed",
+    },
+  }
+}
+
+function choices(part: unknown) {
+  if (!part || typeof part !== "object") return
+  if (!("choices" in part) || !Array.isArray(part.choices)) return
+  const choice = part.choices[0]
+  if (!choice || typeof choice !== "object") return
+  return choice
+}
+
+function flow(item: Sse) {
+  const out: Flow[] = []
+  for (const part of [...item.head, ...item.tail]) {
+    const choice = choices(part)
+    const delta =
+      choice && "delta" in choice && choice.delta && typeof choice.delta === "object" ? choice.delta : undefined
+
+    if (delta && "content" in delta && typeof delta.content === "string") {
+      out.push({ type: "text", text: delta.content })
+    }
+
+    if (delta && "reasoning_content" in delta && typeof delta.reasoning_content === "string") {
+      out.push({ type: "reason", text: delta.reasoning_content })
+    }
+
+    if (delta && "tool_calls" in delta && Array.isArray(delta.tool_calls)) {
+      for (const tool of delta.tool_calls) {
+        if (!tool || typeof tool !== "object") continue
+        const fn = "function" in tool && tool.function && typeof tool.function === "object" ? tool.function : undefined
+        if ("id" in tool && typeof tool.id === "string" && fn && "name" in fn && typeof fn.name === "string") {
+          out.push({ type: "tool-start", id: tool.id, name: fn.name })
+        }
+        if (fn && "arguments" in fn && typeof fn.arguments === "string" && fn.arguments) {
+          out.push({ type: "tool-args", text: fn.arguments })
+        }
+      }
+    }
+
+    if (part && typeof part === "object" && "usage" in part && part.usage && typeof part.usage === "object") {
+      const raw = part.usage as Record<string, unknown>
+      if (typeof raw.prompt_tokens === "number" && typeof raw.completion_tokens === "number") {
+        out.push({
+          type: "usage",
+          usage: { input: raw.prompt_tokens, output: raw.completion_tokens },
+        })
+      }
+    }
+  }
+  return out
+}
+
+function responses(item: Sse, model: string) {
+  let seq = 1
+  let msg: string | undefined
+  let reason: string | undefined
+  let hasMsg = false
+  let hasReason = false
+  let call:
+    | {
+        id: string
+        item: string
+        name: string
+        args: string
+      }
+    | undefined
+  let usage: Usage | undefined
+  const lines: unknown[] = [responseCreated(model)]
+
+  for (const part of flow(item)) {
+    if (part.type === "text") {
+      msg ??= "msg_1"
+      if (!hasMsg) {
+        hasMsg = true
+        seq += 1
+        lines.push(responseMessage(msg, seq))
+      }
+      seq += 1
+      lines.push(responseText(msg, part.text, seq))
+      continue
+    }
+
+    if (part.type === "reason") {
+      reason ||= "rs_1"
+      if (!hasReason) {
+        hasReason = true
+        seq += 1
+        lines.push(responseReason(reason, seq))
+        seq += 1
+        lines.push(responseReasonPart(reason, seq))
+      }
+      seq += 1
+      lines.push(responseReasonText(reason, part.text, seq))
+      continue
+    }
+
+    if (part.type === "tool-start") {
+      call ||= { id: part.id, item: "fc_1", name: part.name, args: "" }
+      seq += 1
+      lines.push(responseTool(call.id, call.item, call.name, seq))
+      continue
+    }
+
+    if (part.type === "tool-args") {
+      if (!call) continue
+      call.args += part.text
+      seq += 1
+      lines.push(responseToolArgs(call.item, part.text, seq))
+      continue
+    }
+
+    usage = part.usage
+  }
+
+  if (msg) {
+    seq += 1
+    lines.push(responseMessageDone(msg, seq))
+  }
+  if (reason) {
+    seq += 1
+    lines.push(responseReasonDone(reason, seq))
+  }
+  if (call && !item.hang && !item.error) {
+    seq += 1
+    lines.push(responseToolArgsDone(call.item, call.args, seq))
+    seq += 1
+    lines.push(responseToolDone(call, seq))
+  }
+  if (!item.hang && !item.error) lines.push(responseCompleted({ seq: seq + 1, usage }))
+  return { ...item, head: lines, tail: [] } satisfies Sse
+}
+
+function modelFrom(body: unknown) {
+  if (!body || typeof body !== "object") return "test-model"
+  if (!("model" in body) || typeof body.model !== "string") return "test-model"
+  return body.model
+}
+
+function send(item: Sse) {
+  const head = bytes(item.head)
+  const tail = bytes([...item.tail, ...(item.hang || item.error ? [] : [done])])
+  const empty = Stream.fromIterable<Uint8Array>([])
+  const wait = item.wait
+  const body: Stream.Stream<Uint8Array, unknown> = wait
+    ? Stream.concat(head, Stream.fromEffect(Effect.promise(() => wait)).pipe(Stream.flatMap(() => tail)))
+    : Stream.concat(head, tail)
+  let end: Stream.Stream<Uint8Array, unknown> = empty
+  if (item.error) end = Stream.concat(empty, Stream.fail(item.error))
+  else if (item.hang) end = Stream.concat(empty, Stream.never)
+
+  return HttpServerResponse.stream(Stream.concat(body, end), { contentType: "text/event-stream" })
+}
+
+const reset = Effect.fn("TestLLMServer.reset")(function* (item: Sse) {
+  const req = yield* HttpServerRequest.HttpServerRequest
+  const res = NodeHttpServerRequest.toServerResponse(req)
+  yield* Effect.sync(() => {
+    res.writeHead(200, { "content-type": "text/event-stream" })
+    for (const part of item.head) res.write(line(part))
+    for (const part of item.tail) res.write(line(part))
+    res.destroy(new Error("connection reset"))
+  })
+  return yield* Effect.never
+})
+
+function fail(item: HttpError) {
+  return HttpServerResponse.text(JSON.stringify(item.body), {
+    status: item.status,
+    contentType: "application/json",
+  })
+}
+
+export class Reply {
+  #head: unknown[] = [role()]
+  #tail: unknown[] = []
+  #usage: Usage | undefined
+  #finish: string | undefined
+  #wait: PromiseLike<unknown> | undefined
+  #hang = false
+  #error: unknown
+  #reset = false
+  #seq = 0
+
+  #id() {
+    this.#seq += 1
+    return `call_${this.#seq}`
+  }
+
+  text(value: string) {
+    this.#tail = [...this.#tail, textLine(value)]
+    return this
+  }
+
+  reason(value: string) {
+    this.#tail = [...this.#tail, reasonLine(value)]
+    return this
+  }
+
+  usage(value: Usage) {
+    this.#usage = value
+    return this
+  }
+
+  wait(value: PromiseLike<unknown>) {
+    this.#wait = value
+    return this
+  }
+
+  stop() {
+    this.#finish = "stop"
+    this.#hang = false
+    this.#error = undefined
+    this.#reset = false
+    return this
+  }
+
+  toolCalls() {
+    this.#finish = "tool_calls"
+    this.#hang = false
+    this.#error = undefined
+    this.#reset = false
+    return this
+  }
+
+  tool(name: string, input: unknown) {
+    const id = this.#id()
+    const args = JSON.stringify(input)
+    this.#tail = [...this.#tail, toolStartLine(id, name), toolArgsLine(args)]
+    return this.toolCalls()
+  }
+
+  pendingTool(name: string, input: unknown) {
+    const id = this.#id()
+    const args = JSON.stringify(input)
+    const size = Math.max(1, Math.floor(args.length / 2))
+    this.#tail = [...this.#tail, toolStartLine(id, name), toolArgsLine(args.slice(0, size))]
+    return this
+  }
+
+  hang() {
+    this.#finish = undefined
+    this.#hang = true
+    this.#error = undefined
+    this.#reset = false
+    return this
+  }
+
+  streamError(error: unknown = "boom") {
+    this.#finish = undefined
+    this.#hang = false
+    this.#error = error
+    this.#reset = false
+    return this
+  }
+
+  reset() {
+    this.#finish = undefined
+    this.#hang = false
+    this.#error = undefined
+    this.#reset = true
+    return this
+  }
+
+  item(): Item {
+    return {
+      type: "sse",
+      head: this.#head,
+      tail: this.#finish ? [...this.#tail, finishLine(this.#finish, this.#usage)] : this.#tail,
+      wait: this.#wait,
+      hang: this.#hang,
+      error: this.#error,
+      reset: this.#reset,
+    }
+  }
+}
+
+export function reply() {
+  return new Reply()
+}
+
+export function httpError(status: number, body: unknown): Item {
+  return {
+    type: "http-error",
+    status,
+    body,
+  }
+}
+
+export function raw(input: {
+  chunks?: unknown[]
+  head?: unknown[]
+  tail?: unknown[]
+  wait?: PromiseLike<unknown>
+  hang?: boolean
+  error?: unknown
+  reset?: boolean
+}): Item {
+  return {
+    type: "sse",
+    head: input.head ?? input.chunks ?? [],
+    tail: input.tail ?? [],
+    wait: input.wait,
+    hang: input.hang,
+    error: input.error,
+    reset: input.reset,
+  }
+}
+
+function item(input: Item | Reply) {
+  return input instanceof Reply ? input.item() : input
+}
+
+function hit(url: string, body: unknown) {
+  return {
+    url: new URL(url, "http://localhost"),
+    body: body && typeof body === "object" ? (body as Record<string, unknown>) : {},
+  } satisfies Hit
+}
+
+function isTitleRequest(body: unknown): boolean {
+  if (!body || typeof body !== "object") return false
+  return JSON.stringify(body).includes("Generate a title for this conversation")
+}
+
+namespace TestLLMServer {
+  export interface Service {
+    readonly url: string
+    readonly push: (...input: (Item | Reply)[]) => Effect.Effect<void>
+    readonly pushMatch: (match: Match, ...input: (Item | Reply)[]) => Effect.Effect<void>
+    readonly textMatch: (match: Match, value: string, opts?: { usage?: Usage }) => Effect.Effect<void>
+    readonly toolMatch: (match: Match, name: string, input: unknown) => Effect.Effect<void>
+    readonly text: (value: string, opts?: { usage?: Usage }) => Effect.Effect<void>
+    readonly tool: (name: string, input: unknown) => Effect.Effect<void>
+    readonly toolHang: (name: string, input: unknown) => Effect.Effect<void>
+    readonly reason: (value: string, opts?: { text?: string; usage?: Usage }) => Effect.Effect<void>
+    readonly fail: (message?: unknown) => Effect.Effect<void>
+    readonly error: (status: number, body: unknown) => Effect.Effect<void>
+    readonly hang: Effect.Effect<void>
+    readonly hold: (value: string, wait: PromiseLike<unknown>) => Effect.Effect<void>
+    readonly reset: Effect.Effect<void>
+    readonly hits: Effect.Effect<Hit[]>
+    readonly calls: Effect.Effect<number>
+    readonly wait: (count: number) => Effect.Effect<void>
+    readonly inputs: Effect.Effect<Record<string, unknown>[]>
+    readonly pending: Effect.Effect<number>
+    readonly misses: Effect.Effect<Hit[]>
+  }
+}
+
+export class TestLLMServer extends Context.Service<TestLLMServer, TestLLMServer.Service>()("@test/LLMServer") {
+  static readonly layer = Layer.effect(
+    TestLLMServer,
+    Effect.gen(function* () {
+      const server = yield* HttpServer.HttpServer
+      const router = yield* HttpRouter.HttpRouter
+
+      let hits: Hit[] = []
+      let list: Queue[] = []
+      let waits: Wait[] = []
+      let misses: Hit[] = []
+
+      const queue = (...input: (Item | Reply)[]) => {
+        list = [...list, ...input.map((value) => ({ item: item(value) }))]
+      }
+
+      const queueMatch = (match: Match, ...input: (Item | Reply)[]) => {
+        list = [...list, ...input.map((value) => ({ item: item(value), match }))]
+      }
+
+      const notify = Effect.fnUntraced(function* () {
+        const ready = waits.filter((item) => hits.length >= item.count)
+        if (!ready.length) return
+        waits = waits.filter((item) => hits.length < item.count)
+        yield* Effect.forEach(ready, (item) => Deferred.succeed(item.ready, void 0))
+      })
+
+      const pull = (hit: Hit) => {
+        const index = list.findIndex((entry) => !entry.match || entry.match(hit))
+        if (index === -1) return
+        const first = list[index]
+        list = [...list.slice(0, index), ...list.slice(index + 1)]
+        return first.item
+      }
+
+      const handle = Effect.fn("TestLLMServer.handle")(function* (mode: "chat" | "responses") {
+        const req = yield* HttpServerRequest.HttpServerRequest
+        const body = yield* req.json.pipe(Effect.orElseSucceed(() => ({})))
+        const current = hit(req.originalUrl, body)
+        if (isTitleRequest(body)) {
+          hits = [...hits, current]
+          yield* notify()
+          const auto: Sse = { type: "sse", head: [role()], tail: [textLine("E2E Title"), finishLine("stop")] }
+          if (mode === "responses") return send(responses(auto, modelFrom(body)))
+          return send(auto)
+        }
+        const next = pull(current)
+        if (!next) {
+          hits = [...hits, current]
+          yield* notify()
+          const auto: Sse = { type: "sse", head: [role()], tail: [textLine("ok"), finishLine("stop")] }
+          if (mode === "responses") return send(responses(auto, modelFrom(body)))
+          return send(auto)
+        }
+        hits = [...hits, current]
+        yield* notify()
+        if (next.type !== "sse") return fail(next)
+        if (mode === "responses") return send(responses(next, modelFrom(body)))
+        if (next.reset) {
+          yield* reset(next)
+          return HttpServerResponse.empty()
+        }
+        return send(next)
+      })
+
+      yield* router.add("POST", "/v1/chat/completions", handle("chat"))
+      yield* router.add("POST", "/v1/responses", handle("responses"))
+
+      yield* server.serve(router.asHttpEffect())
+
+      return TestLLMServer.of({
+        url:
+          server.address._tag === "TcpAddress"
+            ? `http://127.0.0.1:${server.address.port}/v1`
+            : `unix://${server.address.path}/v1`,
+        push: Effect.fn("TestLLMServer.push")(function* (...input: (Item | Reply)[]) {
+          queue(...input)
+        }),
+        pushMatch: Effect.fn("TestLLMServer.pushMatch")(function* (match: Match, ...input: (Item | Reply)[]) {
+          queueMatch(match, ...input)
+        }),
+        textMatch: Effect.fn("TestLLMServer.textMatch")(function* (
+          match: Match,
+          value: string,
+          opts?: { usage?: Usage },
+        ) {
+          const out = reply().text(value)
+          if (opts?.usage) out.usage(opts.usage)
+          queueMatch(match, out.stop().item())
+        }),
+        toolMatch: Effect.fn("TestLLMServer.toolMatch")(function* (match: Match, name: string, input: unknown) {
+          queueMatch(match, reply().tool(name, input).item())
+        }),
+        text: Effect.fn("TestLLMServer.text")(function* (value: string, opts?: { usage?: Usage }) {
+          const out = reply().text(value)
+          if (opts?.usage) out.usage(opts.usage)
+          queue(out.stop().item())
+        }),
+        tool: Effect.fn("TestLLMServer.tool")(function* (name: string, input: unknown) {
+          queue(reply().tool(name, input).item())
+        }),
+        toolHang: Effect.fn("TestLLMServer.toolHang")(function* (name: string, input: unknown) {
+          queue(reply().pendingTool(name, input).hang().item())
+        }),
+        reason: Effect.fn("TestLLMServer.reason")(function* (value: string, opts?: { text?: string; usage?: Usage }) {
+          const out = reply().reason(value)
+          if (opts?.text) out.text(opts.text)
+          if (opts?.usage) out.usage(opts.usage)
+          queue(out.stop().item())
+        }),
+        fail: Effect.fn("TestLLMServer.fail")(function* (message: unknown = "boom") {
+          queue(reply().streamError(message).item())
+        }),
+        error: Effect.fn("TestLLMServer.error")(function* (status: number, body: unknown) {
+          queue(httpError(status, body))
+        }),
+        hang: Effect.gen(function* () {
+          queue(reply().hang().item())
+        }).pipe(Effect.withSpan("TestLLMServer.hang")),
+        hold: Effect.fn("TestLLMServer.hold")(function* (value: string, wait: PromiseLike<unknown>) {
+          queue(reply().wait(wait).text(value).stop().item())
+        }),
+        reset: Effect.sync(() => {
+          hits = []
+          list = []
+          waits = []
+          misses = []
+        }),
+        hits: Effect.sync(() => [...hits]),
+        calls: Effect.sync(() => hits.length),
+        wait: Effect.fn("TestLLMServer.wait")(function* (count: number) {
+          if (hits.length >= count) return
+          const ready = yield* Deferred.make<void>()
+          waits = [...waits, { count, ready }]
+          yield* Deferred.await(ready)
+        }),
+        inputs: Effect.sync(() => hits.map((hit) => hit.body)),
+        pending: Effect.sync(() => list.length),
+        misses: Effect.sync(() => [...misses]),
+      })
+    }),
+  ).pipe(Layer.provide(HttpRouter.layer), Layer.provide(NodeHttpServer.layer(() => Http.createServer(), { port: 0 })))
+}