refactor: rename shared package to core (#24309)

2 files changed, 0 insertions, 815 deletions

diff --git a/packages/shared/test/util/effect-flock.test.ts b/packages/shared/test/util/effect-flock.test.ts
deleted file mode 100644
index bd71e4f02..000000000
--- a/packages/shared/test/util/effect-flock.test.ts
+++ /dev/null
@@ -1,389 +0,0 @@
-import { describe, expect } from "bun:test"
-import { spawn } from "child_process"
-import fs from "fs/promises"
-import path from "path"
-import os from "os"
-import { Cause, Effect, Exit, Layer } from "effect"
-import { testEffect } from "../lib/effect"
-import { AppFileSystem } from "@opencode-ai/shared/filesystem"
-import { EffectFlock } from "@opencode-ai/shared/util/effect-flock"
-import { Global } from "@opencode-ai/shared/global"
-import { Hash } from "@opencode-ai/shared/util/hash"
-
-function lock(dir: string, key: string) {
-  return path.join(dir, Hash.fast(key) + ".lock")
-}
-
-function sleep(ms: number) {
-  return new Promise<void>((resolve) => setTimeout(resolve, ms))
-}
-
-async function exists(file: string) {
-  return fs
-    .stat(file)
-    .then(() => true)
-    .catch(() => false)
-}
-
-async function readJson<T>(p: string): Promise<T> {
-  return JSON.parse(await fs.readFile(p, "utf8"))
-}
-
-// ---------------------------------------------------------------------------
-// Worker subprocess helpers
-// ---------------------------------------------------------------------------
-
-type Msg = {
-  key: string
-  dir: string
-  holdMs?: number
-  ready?: string
-  active?: string
-  done?: string
-}
-
-const root = path.join(import.meta.dir, "../..")
-const worker = path.join(import.meta.dir, "../fixture/effect-flock-worker.ts")
-
-function run(msg: Msg) {
-  return new Promise<{ code: number; stdout: Buffer; stderr: Buffer }>((resolve) => {
-    const proc = spawn(process.execPath, [worker, JSON.stringify(msg)], { cwd: root })
-    const stdout: Buffer[] = []
-    const stderr: Buffer[] = []
-    proc.stdout?.on("data", (data) => stdout.push(Buffer.from(data)))
-    proc.stderr?.on("data", (data) => stderr.push(Buffer.from(data)))
-    proc.on("close", (code) => {
-      resolve({ code: code ?? 1, stdout: Buffer.concat(stdout), stderr: Buffer.concat(stderr) })
-    })
-  })
-}
-
-function spawnWorker(msg: Msg) {
-  return spawn(process.execPath, [worker, JSON.stringify(msg)], {
-    cwd: root,
-    stdio: ["ignore", "pipe", "pipe"],
-  })
-}
-
-function stopWorker(proc: ReturnType<typeof spawnWorker>) {
-  if (proc.exitCode !== null || proc.signalCode !== null) return Promise.resolve()
-  if (process.platform !== "win32" || !proc.pid) {
-    proc.kill()
-    return Promise.resolve()
-  }
-  return new Promise<void>((resolve) => {
-    const killProc = spawn("taskkill", ["/pid", String(proc.pid), "/T", "/F"])
-    killProc.on("close", () => {
-      proc.kill()
-      resolve()
-    })
-  })
-}
-
-async function waitForFile(file: string, timeout = 3_000) {
-  const stop = Date.now() + timeout
-  while (Date.now() < stop) {
-    if (await exists(file)) return
-    await sleep(20)
-  }
-  throw new Error(`Timed out waiting for file: ${file}`)
-}
-
-// ---------------------------------------------------------------------------
-// Test layer
-// ---------------------------------------------------------------------------
-
-const testGlobal = Layer.succeed(
-  Global.Service,
-  Global.Service.of({
-    home: os.homedir(),
-    data: os.tmpdir(),
-    cache: os.tmpdir(),
-    config: os.tmpdir(),
-    state: os.tmpdir(),
-    bin: os.tmpdir(),
-    log: os.tmpdir(),
-  }),
-)
-
-const testLayer = EffectFlock.layer.pipe(Layer.provide(testGlobal), Layer.provide(AppFileSystem.defaultLayer))
-
-// ---------------------------------------------------------------------------
-// Tests
-// ---------------------------------------------------------------------------
-
-describe("util.effect-flock", () => {
-  const it = testEffect(testLayer)
-
-  it.live(
-    "acquire and release via scoped Effect",
-    Effect.gen(function* () {
-      const flock = yield* EffectFlock.Service
-      const tmp = yield* Effect.promise(() => fs.mkdtemp(path.join(os.tmpdir(), "eflock-test-")))
-      const dir = path.join(tmp, "locks")
-      const lockDir = lock(dir, "eflock:acquire")
-
-      yield* Effect.scoped(flock.acquire("eflock:acquire", dir))
-
-      expect(yield* Effect.promise(() => exists(lockDir))).toBe(false)
-      yield* Effect.promise(() => fs.rm(tmp, { recursive: true, force: true }))
-    }),
-  )
-
-  it.live(
-    "withLock data-first",
-    Effect.gen(function* () {
-      const flock = yield* EffectFlock.Service
-      const tmp = yield* Effect.promise(() => fs.mkdtemp(path.join(os.tmpdir(), "eflock-test-")))
-      const dir = path.join(tmp, "locks")
-
-      let hit = false
-      yield* flock.withLock(
-        Effect.sync(() => {
-          hit = true
-        }),
-        "eflock:df",
-        dir,
-      )
-      expect(hit).toBe(true)
-      yield* Effect.promise(() => fs.rm(tmp, { recursive: true, force: true }))
-    }),
-  )
-
-  it.live(
-    "withLock pipeable",
-    Effect.gen(function* () {
-      const flock = yield* EffectFlock.Service
-      const tmp = yield* Effect.promise(() => fs.mkdtemp(path.join(os.tmpdir(), "eflock-test-")))
-      const dir = path.join(tmp, "locks")
-
-      let hit = false
-      yield* Effect.sync(() => {
-        hit = true
-      }).pipe(flock.withLock("eflock:pipe", dir))
-      expect(hit).toBe(true)
-      yield* Effect.promise(() => fs.rm(tmp, { recursive: true, force: true }))
-    }),
-  )
-
-  it.live(
-    "writes owner metadata",
-    Effect.gen(function* () {
-      const flock = yield* EffectFlock.Service
-      const tmp = yield* Effect.promise(() => fs.mkdtemp(path.join(os.tmpdir(), "eflock-test-")))
-      const dir = path.join(tmp, "locks")
-      const key = "eflock:meta"
-      const file = path.join(lock(dir, key), "meta.json")
-
-      yield* Effect.scoped(
-        Effect.gen(function* () {
-          yield* flock.acquire(key, dir)
-          const json = yield* Effect.promise(() =>
-            readJson<{ token?: unknown; pid?: unknown; hostname?: unknown; createdAt?: unknown }>(file),
-          )
-          expect(typeof json.token).toBe("string")
-          expect(typeof json.pid).toBe("number")
-          expect(typeof json.hostname).toBe("string")
-          expect(typeof json.createdAt).toBe("string")
-        }),
-      )
-      yield* Effect.promise(() => fs.rm(tmp, { recursive: true, force: true }))
-    }),
-  )
-
-  it.live(
-    "breaks stale lock dirs",
-    Effect.gen(function* () {
-      const flock = yield* EffectFlock.Service
-      const tmp = yield* Effect.promise(() => fs.mkdtemp(path.join(os.tmpdir(), "eflock-test-")))
-      const dir = path.join(tmp, "locks")
-      const key = "eflock:stale"
-      const lockDir = lock(dir, key)
-
-      yield* Effect.promise(async () => {
-        await fs.mkdir(lockDir, { recursive: true })
-        const old = new Date(Date.now() - 120_000)
-        await fs.utimes(lockDir, old, old)
-      })
-
-      let hit = false
-      yield* flock.withLock(
-        Effect.sync(() => {
-          hit = true
-        }),
-        key,
-        dir,
-      )
-      expect(hit).toBe(true)
-      yield* Effect.promise(() => fs.rm(tmp, { recursive: true, force: true }))
-    }),
-  )
-
-  it.live(
-    "recovers from stale breaker",
-    Effect.gen(function* () {
-      const flock = yield* EffectFlock.Service
-      const tmp = yield* Effect.promise(() => fs.mkdtemp(path.join(os.tmpdir(), "eflock-test-")))
-      const dir = path.join(tmp, "locks")
-      const key = "eflock:stale-breaker"
-      const lockDir = lock(dir, key)
-      const breaker = lockDir + ".breaker"
-
-      yield* Effect.promise(async () => {
-        await fs.mkdir(lockDir, { recursive: true })
-        await fs.mkdir(breaker)
-        const old = new Date(Date.now() - 120_000)
-        await fs.utimes(lockDir, old, old)
-        await fs.utimes(breaker, old, old)
-      })
-
-      let hit = false
-      yield* flock.withLock(
-        Effect.sync(() => {
-          hit = true
-        }),
-        key,
-        dir,
-      )
-      expect(hit).toBe(true)
-      expect(yield* Effect.promise(() => exists(breaker))).toBe(false)
-      yield* Effect.promise(() => fs.rm(tmp, { recursive: true, force: true }))
-    }),
-  )
-
-  it.live(
-    "detects compromise when lock dir removed",
-    Effect.gen(function* () {
-      const flock = yield* EffectFlock.Service
-      const tmp = yield* Effect.promise(() => fs.mkdtemp(path.join(os.tmpdir(), "eflock-test-")))
-      const dir = path.join(tmp, "locks")
-      const key = "eflock:compromised"
-      const lockDir = lock(dir, key)
-
-      const result = yield* flock
-        .withLock(
-          Effect.promise(() => fs.rm(lockDir, { recursive: true, force: true })),
-          key,
-          dir,
-        )
-        .pipe(Effect.exit)
-
-      expect(Exit.isFailure(result)).toBe(true)
-      expect(Exit.isFailure(result) ? Cause.pretty(result.cause) : "").toContain("missing")
-      yield* Effect.promise(() => fs.rm(tmp, { recursive: true, force: true }))
-    }),
-  )
-
-  it.live(
-    "detects token mismatch",
-    Effect.gen(function* () {
-      const flock = yield* EffectFlock.Service
-      const tmp = yield* Effect.promise(() => fs.mkdtemp(path.join(os.tmpdir(), "eflock-test-")))
-      const dir = path.join(tmp, "locks")
-      const key = "eflock:token"
-      const lockDir = lock(dir, key)
-      const meta = path.join(lockDir, "meta.json")
-
-      const result = yield* flock
-        .withLock(
-          Effect.promise(async () => {
-            const json = await readJson<{ token?: string }>(meta)
-            json.token = "tampered"
-            await fs.writeFile(meta, JSON.stringify(json, null, 2))
-          }),
-          key,
-          dir,
-        )
-        .pipe(Effect.exit)
-
-      expect(Exit.isFailure(result)).toBe(true)
-      expect(Exit.isFailure(result) ? Cause.pretty(result.cause) : "").toContain("token mismatch")
-      expect(yield* Effect.promise(() => exists(lockDir))).toBe(true)
-      yield* Effect.promise(() => fs.rm(tmp, { recursive: true, force: true }))
-    }),
-  )
-
-  it.live(
-    "fails on unwritable lock roots",
-    Effect.gen(function* () {
-      if (process.platform === "win32") return
-      const flock = yield* EffectFlock.Service
-      const tmp = yield* Effect.promise(() => fs.mkdtemp(path.join(os.tmpdir(), "eflock-test-")))
-      const dir = path.join(tmp, "locks")
-
-      yield* Effect.promise(async () => {
-        await fs.mkdir(dir, { recursive: true })
-        await fs.chmod(dir, 0o500)
-      })
-
-      const result = yield* flock.withLock(Effect.void, "eflock:perm", dir).pipe(Effect.exit)
-      // oxlint-disable-next-line no-base-to-string -- Exit has a useful toString for test assertions
-      expect(String(result)).toContain("PermissionDenied")
-      yield* Effect.promise(() => fs.chmod(dir, 0o700).then(() => fs.rm(tmp, { recursive: true, force: true })))
-    }),
-  )
-
-  it.live(
-    "enforces mutual exclusion under process contention",
-    () =>
-      Effect.promise(async () => {
-        const tmp = await fs.mkdtemp(path.join(os.tmpdir(), "eflock-stress-"))
-        const dir = path.join(tmp, "locks")
-        const done = path.join(tmp, "done.log")
-        const active = path.join(tmp, "active")
-        const n = 16
-
-        try {
-          const out = await Promise.all(
-            Array.from({ length: n }, () => run({ key: "eflock:stress", dir, done, active, holdMs: 30 })),
-          )
-
-          expect(out.map((x) => x.code)).toEqual(Array.from({ length: n }, () => 0))
-          expect(out.map((x) => x.stderr.toString()).filter(Boolean)).toEqual([])
-
-          const lines = (await fs.readFile(done, "utf8"))
-            .split("\n")
-            .map((x) => x.trim())
-            .filter(Boolean)
-          expect(lines.length).toBe(n)
-        } finally {
-          await fs.rm(tmp, { recursive: true, force: true })
-        }
-      }),
-    60_000,
-  )
-
-  it.live(
-    "recovers after a crashed lock owner",
-    () =>
-      Effect.promise(async () => {
-        const tmp = await fs.mkdtemp(path.join(os.tmpdir(), "eflock-crash-"))
-        const dir = path.join(tmp, "locks")
-        const ready = path.join(tmp, "ready")
-
-        const proc = spawnWorker({ key: "eflock:crash", dir, ready, holdMs: 120_000 })
-
-        try {
-          await waitForFile(ready, 5_000)
-          await stopWorker(proc)
-          await new Promise((resolve) => proc.on("close", resolve))
-
-          // Backdate lock files so they're past STALE_MS (60s)
-          const lockDir = lock(dir, "eflock:crash")
-          const old = new Date(Date.now() - 120_000)
-          await fs.utimes(lockDir, old, old).catch(() => {})
-          await fs.utimes(path.join(lockDir, "heartbeat"), old, old).catch(() => {})
-          await fs.utimes(path.join(lockDir, "meta.json"), old, old).catch(() => {})
-
-          const done = path.join(tmp, "done.log")
-          const result = await run({ key: "eflock:crash", dir, done, holdMs: 10 })
-          expect(result.code).toBe(0)
-          expect(result.stderr.toString()).toBe("")
-        } finally {
-          await stopWorker(proc).catch(() => {})
-          await fs.rm(tmp, { recursive: true, force: true })
-        }
-      }),
-    30_000,
-  )
-})
diff --git a/packages/shared/test/util/flock.test.ts b/packages/shared/test/util/flock.test.ts
deleted file mode 100644
index f1053dfd2..000000000
--- a/packages/shared/test/util/flock.test.ts
+++ /dev/null
@@ -1,426 +0,0 @@
-import { describe, expect, test } from "bun:test"
-import fs from "fs/promises"
-import { spawn } from "child_process"
-import path from "path"
-import os from "os"
-import { Flock } from "@opencode-ai/shared/util/flock"
-import { Hash } from "@opencode-ai/shared/util/hash"
-
-type Msg = {
-  key: string
-  dir: string
-  staleMs?: number
-  timeoutMs?: number
-  baseDelayMs?: number
-  maxDelayMs?: number
-  holdMs?: number
-  ready?: string
-  active?: string
-  done?: string
-}
-
-const root = path.join(import.meta.dir, "../..")
-const worker = path.join(import.meta.dir, "../fixture/flock-worker.ts")
-
-async function tmpdir() {
-  const dir = await fs.mkdtemp(path.join(os.tmpdir(), "flock-test-"))
-  return {
-    path: dir,
-    async [Symbol.asyncDispose]() {
-      await fs.rm(dir, { recursive: true, force: true })
-    },
-  }
-}
-
-function lock(dir: string, key: string) {
-  return path.join(dir, Hash.fast(key) + ".lock")
-}
-
-function sleep(ms: number) {
-  return new Promise<void>((resolve) => {
-    setTimeout(resolve, ms)
-  })
-}
-
-async function exists(file: string) {
-  return fs
-    .stat(file)
-    .then(() => true)
-    .catch(() => false)
-}
-
-async function wait(file: string, timeout = 3_000) {
-  const stop = Date.now() + timeout
-  while (Date.now() < stop) {
-    if (await exists(file)) return
-    await sleep(20)
-  }
-
-  throw new Error(`Timed out waiting for file: ${file}`)
-}
-
-function run(msg: Msg) {
-  return new Promise<{ code: number; stdout: Buffer; stderr: Buffer }>((resolve) => {
-    const proc = spawn(process.execPath, [worker, JSON.stringify(msg)], {
-      cwd: root,
-    })
-
-    const stdout: Buffer[] = []
-    const stderr: Buffer[] = []
-
-    proc.stdout?.on("data", (data) => stdout.push(Buffer.from(data)))
-    proc.stderr?.on("data", (data) => stderr.push(Buffer.from(data)))
-
-    proc.on("close", (code) => {
-      resolve({
-        code: code ?? 1,
-        stdout: Buffer.concat(stdout),
-        stderr: Buffer.concat(stderr),
-      })
-    })
-  })
-}
-
-function spawnWorker(msg: Msg) {
-  return spawn(process.execPath, [worker, JSON.stringify(msg)], {
-    cwd: root,
-    stdio: ["ignore", "pipe", "pipe"],
-  })
-}
-
-function stopWorker(proc: ReturnType<typeof spawnWorker>) {
-  if (proc.exitCode !== null || proc.signalCode !== null) return Promise.resolve()
-
-  if (process.platform !== "win32" || !proc.pid) {
-    proc.kill()
-    return Promise.resolve()
-  }
-
-  return new Promise<void>((resolve) => {
-    const killProc = spawn("taskkill", ["/pid", String(proc.pid), "/T", "/F"])
-    killProc.on("close", () => {
-      proc.kill()
-      resolve()
-    })
-  })
-}
-
-async function readJson<T>(p: string): Promise<T> {
-  return JSON.parse(await fs.readFile(p, "utf8"))
-}
-
-describe("util.flock", () => {
-  test("enforces mutual exclusion under process contention", async () => {
-    await using tmp = await tmpdir()
-    const dir = path.join(tmp.path, "locks")
-    const done = path.join(tmp.path, "done.log")
-    const active = path.join(tmp.path, "active")
-    const key = "flock:stress"
-    const n = 16
-
-    const out = await Promise.all(
-      Array.from({ length: n }, () =>
-        run({
-          key,
-          dir,
-          done,
-          active,
-          holdMs: 30,
-          staleMs: 1_000,
-          timeoutMs: 15_000,
-        }),
-      ),
-    )
-
-    expect(out.map((x) => x.code)).toEqual(Array.from({ length: n }, () => 0))
-    expect(out.map((x) => x.stderr.toString()).filter(Boolean)).toEqual([])
-
-    const lines = (await fs.readFile(done, "utf8"))
-      .split("\n")
-      .map((x) => x.trim())
-      .filter(Boolean)
-    expect(lines.length).toBe(n)
-  }, 20_000)
-
-  test("times out while waiting when lock is still healthy", async () => {
-    await using tmp = await tmpdir()
-    const dir = path.join(tmp.path, "locks")
-    const key = "flock:timeout"
-    const ready = path.join(tmp.path, "ready")
-    const proc = spawnWorker({
-      key,
-      dir,
-      ready,
-      holdMs: 20_000,
-      staleMs: 10_000,
-      timeoutMs: 30_000,
-    })
-
-    try {
-      await wait(ready, 5_000)
-      const seen: string[] = []
-      const err = await Flock.withLock(key, async () => {}, {
-        dir,
-        staleMs: 10_000,
-        timeoutMs: 1_000,
-        onWait: (tick) => {
-          seen.push(tick.key)
-        },
-      }).catch((err) => err)
-
-      expect(err).toBeInstanceOf(Error)
-      if (!(err instanceof Error)) throw err
-      expect(err.message).toContain("Timed out waiting for lock")
-      expect(seen.length).toBeGreaterThan(0)
-      expect(seen.every((x) => x === key)).toBe(true)
-    } finally {
-      await stopWorker(proc).catch(() => undefined)
-      await new Promise((resolve) => proc.on("close", resolve))
-    }
-  }, 15_000)
-
-  test("recovers after a crashed lock owner", async () => {
-    await using tmp = await tmpdir()
-    const dir = path.join(tmp.path, "locks")
-    const key = "flock:crash"
-    const ready = path.join(tmp.path, "ready")
-    const proc = spawnWorker({
-      key,
-      dir,
-      ready,
-      holdMs: 20_000,
-      staleMs: 500,
-      timeoutMs: 30_000,
-    })
-
-    await wait(ready, 5_000)
-    await stopWorker(proc)
-    await new Promise((resolve) => proc.on("close", resolve))
-
-    let hit = false
-    await Flock.withLock(
-      key,
-      async () => {
-        hit = true
-      },
-      {
-        dir,
-        staleMs: 500,
-        timeoutMs: 8_000,
-      },
-    )
-
-    expect(hit).toBe(true)
-  }, 20_000)
-
-  test("breaks stale lock dirs when heartbeat is missing", async () => {
-    await using tmp = await tmpdir()
-    const dir = path.join(tmp.path, "locks")
-    const key = "flock:missing-heartbeat"
-    const lockDir = lock(dir, key)
-
-    await fs.mkdir(lockDir, { recursive: true })
-    const old = new Date(Date.now() - 2_000)
-    await fs.utimes(lockDir, old, old)
-
-    let hit = false
-    await Flock.withLock(
-      key,
-      async () => {
-        hit = true
-      },
-      {
-        dir,
-        staleMs: 200,
-        timeoutMs: 3_000,
-      },
-    )
-
-    expect(hit).toBe(true)
-  })
-
-  test("recovers when a stale breaker claim was left behind", async () => {
-    await using tmp = await tmpdir()
-    const dir = path.join(tmp.path, "locks")
-    const key = "flock:stale-breaker"
-    const lockDir = lock(dir, key)
-    const breaker = lockDir + ".breaker"
-
-    await fs.mkdir(lockDir, { recursive: true })
-    await fs.mkdir(breaker)
-
-    const old = new Date(Date.now() - 2_000)
-    await fs.utimes(lockDir, old, old)
-    await fs.utimes(breaker, old, old)
-
-    let hit = false
-    await Flock.withLock(
-      key,
-      async () => {
-        hit = true
-      },
-      {
-        dir,
-        staleMs: 200,
-        timeoutMs: 3_000,
-      },
-    )
-
-    expect(hit).toBe(true)
-    expect(await exists(breaker)).toBe(false)
-  })
-
-  test("fails clearly if lock dir is removed while held", async () => {
-    await using tmp = await tmpdir()
-    const dir = path.join(tmp.path, "locks")
-    const key = "flock:compromised"
-    const lockDir = lock(dir, key)
-
-    const err = await Flock.withLock(
-      key,
-      async () => {
-        await fs.rm(lockDir, {
-          recursive: true,
-          force: true,
-        })
-      },
-      {
-        dir,
-        staleMs: 1_000,
-        timeoutMs: 3_000,
-      },
-    ).catch((err) => err)
-
-    expect(err).toBeInstanceOf(Error)
-    if (!(err instanceof Error)) throw err
-    expect(err.message).toContain("compromised")
-
-    let hit = false
-    await Flock.withLock(
-      key,
-      async () => {
-        hit = true
-      },
-      {
-        dir,
-        staleMs: 200,
-        timeoutMs: 3_000,
-      },
-    )
-    expect(hit).toBe(true)
-  })
-
-  test("writes owner metadata while lock is held", async () => {
-    await using tmp = await tmpdir()
-    const dir = path.join(tmp.path, "locks")
-    const key = "flock:meta"
-    const file = path.join(lock(dir, key), "meta.json")
-
-    await Flock.withLock(
-      key,
-      async () => {
-        const json = await readJson<{
-          token?: unknown
-          pid?: unknown
-          hostname?: unknown
-          createdAt?: unknown
-        }>(file)
-
-        expect(typeof json.token).toBe("string")
-        expect(typeof json.pid).toBe("number")
-        expect(typeof json.hostname).toBe("string")
-        expect(typeof json.createdAt).toBe("string")
-      },
-      {
-        dir,
-        staleMs: 1_000,
-        timeoutMs: 3_000,
-      },
-    )
-  })
-
-  test("supports acquire with await using", async () => {
-    await using tmp = await tmpdir()
-    const dir = path.join(tmp.path, "locks")
-    const key = "flock:acquire"
-    const lockDir = lock(dir, key)
-
-    {
-      await using _ = await Flock.acquire(key, {
-        dir,
-        staleMs: 1_000,
-        timeoutMs: 3_000,
-      })
-      expect(await exists(lockDir)).toBe(true)
-    }
-
-    expect(await exists(lockDir)).toBe(false)
-  })
-
-  test("refuses token mismatch release and recovers from stale", async () => {
-    await using tmp = await tmpdir()
-    const dir = path.join(tmp.path, "locks")
-    const key = "flock:token"
-    const lockDir = lock(dir, key)
-    const meta = path.join(lockDir, "meta.json")
-
-    const err = await Flock.withLock(
-      key,
-      async () => {
-        const json = await readJson<{ token?: string }>(meta)
-        json.token = "tampered"
-        await fs.writeFile(meta, JSON.stringify(json, null, 2))
-      },
-      {
-        dir,
-        staleMs: 500,
-        timeoutMs: 3_000,
-      },
-    ).catch((err) => err)
-
-    expect(err).toBeInstanceOf(Error)
-    if (!(err instanceof Error)) throw err
-    expect(err.message).toContain("token mismatch")
-    expect(await exists(lockDir)).toBe(true)
-
-    let hit = false
-    await Flock.withLock(
-      key,
-      async () => {
-        hit = true
-      },
-      {
-        dir,
-        staleMs: 500,
-        timeoutMs: 6_000,
-      },
-    )
-    expect(hit).toBe(true)
-  })
-
-  test("fails clearly on unwritable lock roots", async () => {
-    if (process.platform === "win32") return
-
-    await using tmp = await tmpdir()
-    const dir = path.join(tmp.path, "locks")
-    const key = "flock:perm"
-
-    await fs.mkdir(dir, { recursive: true })
-    await fs.chmod(dir, 0o500)
-
-    try {
-      const err = await Flock.withLock(key, async () => {}, {
-        dir,
-        staleMs: 100,
-        timeoutMs: 500,
-      }).catch((err) => err)
-
-      expect(err).toBeInstanceOf(Error)
-      if (!(err instanceof Error)) throw err
-      const text = err.message
-      expect(text.includes("EACCES") || text.includes("EPERM")).toBe(true)
-    } finally {
-      await fs.chmod(dir, 0o700)
-    }
-  })
-})