deepseek-ai/deepseek-harness · error · Error

cordis-client-runner: window.__ModuleLoader__ is missing (bo

Error message

cordis-client-runner: window.__ModuleLoader__ is missing (booted outside the web shell?)

What it means

Error "cordis-client-runner: window.__ModuleLoader__ is missing (booted outside the web shell?)" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/extensions/cordis-client-runner/src/client/runtime.ts:374

    } catch (error) {
      styles.dispose()
      return { ok: false, cause: 'evaluate', ...errorDetails(error), error }
    }

    const pkg: DynamicCordisPackage = {
      pluginId: half.pluginId,
      packageId: half.packageId,
      pluginRunId: half.pluginRunId,
      name: half.name,
    }
    const surface = this.guardedSurface(pkg, half.agentId, plugin, ledger)
    const moduleId = moduleIdOf(half.pluginId)
    // Invalidate-then-register keeps re-loading legal: the module table throws
    // loudly on a duplicate factory registration.
    this.env.modules.invalidate(moduleId)
    const sink = (globalThis as ModuleLoaderSink).__ModuleLoader__
    if (sink === undefined) {
      throw new Error('cordis-client-runner: window.__ModuleLoader__ is missing (booted outside the web shell?)')
    }
    sink.load({ id: moduleId, factory: () => surface })

    const entryId = await this.env.loader.create({ name: moduleId })
    const fiber = this.env.loader.resolve(entryId).fiber
    if (fiber === undefined) {
      await this.teardown(half.pluginId, entryId, styles)
      return { ok: false, cause: 'module-import', message: 'module import failed (see the browser console)' }
    }
    try {
      await fiber.await()
    } catch (error) {
      await this.teardown(half.pluginId, entryId, styles)
      return { ok: false, cause: 'activate', ...errorDetails(error), error }
    }
    // Settled but not active = legal pending on an unsatisfied declaration. The
    // record is seated only now, so an error mirrored during `apply` cannot
    // claim the package is already live.

View on GitHub (pinned to b150a551b8)

When it happens

Trigger: Thrown at packages/extensions/cordis-client-runner/src/client/runtime.ts:374 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/c2d1f8d63c2e3809. Report an issue: GitHub.