deepseek-ai/deepseek-harness · error

AclSandbox read-only does not accept write SIDs

Error message

AclSandbox read-only does not accept write SIDs

What it means

Error "AclSandbox read-only does not accept write SIDs" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/sandbox/sandbox-windows-acl/src/index.ts:203

      if (!existsSync(absolute) || !statSync(absolute).isDirectory()) {
        throw new Error(`AclSandbox writable dir does not exist or is not a directory: ${absolute}`)
      }
      return absolute
    })
    this.tempDirOption = options.tempDir
    this.writeSid = options.writeSid
    this.tempWriteSid = options.tempWriteSid
    if (this.mode === 'workspace-write' && this.writeSid === undefined) {
      throw new Error('AclSandbox workspace-write requires a write SID — derive it from the workspace via workspaceWriteSid()')
    }
    if (this.mode === 'workspace-write' && this.tempDirOption === undefined) {
      throw new Error('AclSandbox workspace-write requires an explicit private temp directory or null')
    }
    if (this.mode === 'read-only' && this.tempDirOption !== undefined && this.tempDirOption !== null) {
      throw new Error('AclSandbox read-only does not accept a temp directory')
    }
    if (this.mode === 'read-only' && (this.writeSid !== undefined || this.tempWriteSid !== undefined)) {
      throw new Error('AclSandbox read-only does not accept write SIDs')
    }
    if (this.mode === 'workspace-write' && this.tempDirOption !== null && this.tempWriteSid === undefined) {
      throw new Error('AclSandbox workspace-write with temp requires a temp write SID — derive it via tempWriteSid()')
    }
    if (this.tempDirOption === null && this.tempWriteSid !== undefined) {
      throw new Error('AclSandbox temp write SID requires a temp directory')
    }
    if (this.writeSid !== undefined && this.tempWriteSid === this.writeSid) {
      throw new Error('AclSandbox workspace and temp write SIDs must be distinct')
    }
  }

  /** Resolved temp directory (available after init; null when temp grants are disabled). */
  get tempDir(): string | null | undefined {
    return this.tempDirResolved
  }

  /** Create the restricted token and apply the capability-SID grants. Idempotent-unsafe: once per instance. */

View on GitHub (pinned to b150a551b8)

Solutions

1. Remove the write SIDs from the options; read-only sandboxes grant no write access.

When it happens

Trigger: Thrown at packages/sandbox/sandbox-windows-acl/src/index.ts:203 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/7403af6cb15767ea. Report an issue: GitHub.