This is an independent DeepSeek Harness plugin; it is not an official Google
or DeepSeek release. Harness² is Google Research's Apache-2.0 project:
https://github.com/google-research/harness2

The Python bridge imports the separately installed upstream implementation at
revision 1cfe254e8d25b15f37048c3730134686abe60335. It does not vendor the upstream
optimizer or invoke its unrestricted OpenCode/Codex executor. The host supplies
model callbacks and explicit, isolated execution adapters.