row(s) published process-global service(s) [${leaked.join(',

Error message

row(s) published process-global service(s) [${leaked.join(', ')}]; a preset service must sit behind an `isolate` realm or move to the host composition

What it means

Error "row(s) published process-global service(s) [${leaked.join(', ')}]; a preset service must sit behind an `isolate` realm or move to the host composition" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/preset/agent-presets/src/mount.ts:363

  if (agentCtx.baseUrl !== undefined) harnessBase.set(config, agentCtx.baseUrl)
  // Before the record this mount is about to add: standing mounts are one per
  // preset and live until whole-tree teardown, so pruning here only sweeps
  // records of torn-down runtimes (tests; an HMR reload of the roster).
  pruneDisposedMounts()
  const handle = agentCtx.plugin(PresetTree, config)
  try {
    await handle.await()
    const subtree = mounted.get(config)
    /* v8 ignore next -- the subclass constructor runs before `await()` settles for every mounted tree */
    if (subtree === undefined) throw new Error('mounted subtree did not publish its entry tree')
    const { tree, fiber } = subtree
    const unusable = inactiveRows(tree)
    if (unusable.length > 0) {
      throw new Error(`${String(unusable.length)} row(s) did not activate:\n${unusable.join('\n')}`)
    }
    const leaked = leakedServices(agentCtx, fiber)
    if (leaked.length > 0) {
      throw new Error(
        `row(s) published process-global service(s) [${leaked.join(', ')}]; `
        + 'a preset service must sit behind an `isolate` realm or move to the host composition',
      )
    }
    mounts.add({ presetId: preset.id, fiber, key: scopeOf(agentCtx) })
  } catch (error) {
    try {
      await handle.dispose()
    /* v8 ignore next 5 -- teardown of a subtree nothing else references has no
       observed failure mode; the guard exists so a teardown error cannot
       replace the mount diagnostic the caller needs. */
    } catch {
      // Swallows only this subtree's teardown failure. The mount error below is
      // the actionable one, and the discarded fiber is unreachable either way.
    }
    throw new PresetMountError(preset.id, `${mountDetail(error)} (${preset.path})`, { cause: error })
  }
}

View on GitHub (pinned to b150a551b8)

Solutions

Put the preset service behind an isolate realm, or move it to the host composition.

When it happens

Trigger: Thrown at packages/preset/agent-presets/src/mount.ts:363 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of deepseek-ai/deepseek-harness@b150a551b8 (2026-08-24). Data as JSON: /api/errors/2106903aeaf2bd1d. Report an issue: GitHub.