DeepSeek published the v0.2.1-alpha.1 prerelease of DeepSeek Harness on October 3, 2026, adding a “Let Agent create a plugin” entry to plugin management. Selecting it carries the existing draft into Creator mode, and execution waits until the user submits the plugin-creation request. Plugin Management Changes Creator mode was already documented before this prerelease. The v0.1.6-alpha.2 notes, published September 17, 2026, describe a move away from Cordis dynamic definition and execution tools…