Starfie1d1272/dsh-v4-anchor: DeepSeek V4 Standard First Request Anchoring and Promotion Recovery

`Starfie1d1272/dsh-v4-anchor` is an RL anchoring patch for the DeepSeek Harness Standard plugin, specifically designed for the DeepSeek V4 model. Its core functionality is to constrain the session to a minimized RL-shaped surface (containing only `bash/pwsh` and `str_replace_editor`) before the first persistent `tool/call`, temporarily removing runtime contexts, the Skill Catalog, and `AGENTS.md` injection. Once the model completes its first tool call, the plugin automatically restores full Standard capabilities, including the original prompt, the full tool directory, and skills.