[temeteke]

Scope: DeepSeek Harness (dsh) only

• Add the dsh Feature using the official @deepseek-ai/dsh npm package.
• Persist ~/.dsh profiles, settings and sessions via writable host bind mount.
• Add install, persist, and version Feature options with Node LTS.
• Add standalone usage documentation, and the same PR-time validation workflow.

Excluded: Pi Coding Agent is delivered and tested separately in #4.

Verification

• CI runs shell/JSON syntax checks.
• Real Dev Container/npm installation, DSH profile boot and actual provider calls require integration checks before promoting from draft.
• DSH web mode is not exposed automatically; ports must be separately configured.

Integration

Publish the Feature first; then integrate via a separate dsh-only dcs PR.