What it may solve
Patch-style file editing for DeepSeek Harness: one apply_patch tool accepting git/unified diff (default) and Codex apply_patch syntax (opt-in), with all-or-nothing application, read-before-write intent dance, sandbox-aware delete/move, and 0.1.2-rc.1 ~ 0.
Imported third-party catalog description; not a Registry verification conclusion.