DeepSeek Harness External Migration: Migrating Configurations and Session Histories from Codex, Claude Code, Qoder, and OpenCode into DSH

DeepSeek Harness External Migration is a plugin designed to migrate configuration signals and session histories from external agent tools such as Codex and Claude Code into DeepSeek Harness. To address the risks of manual migration, including inadvertent modification of source files, credential leakage, and automatic configuration application, the plugin adopts a secure three-step process of "Scan-Preview-Import." It provides three core tools: `scan`, which performs read-only inventory of the source; `preview`, which parses and previews the results; and `import`, which requires explicit confirmation before writing. The plugin does not modify source files, does not copy credentials, replaces MCP secrets with environment variable references, and generated configuration packages are exported solely for review without automatic application. Installation requires compatible versions and a specific Node.js environment, via `dsh pl