dsh-smarter-edit

The DSH native edit protocol forces the model to reconstruct exact source strings it has already read, then ship both old and new code through structured JSON arguments. A correct code change can be rejected because old_string differs from the file by a single tab or line ending, triggering retries or a fallback to Bash. Exact-string matching plus JSON escaping burns tokens that should go toward the actual code change.

Smarter Edit replaces the native edit, write, and str_replace_editor tools with a Codex-compatible freeform apply_patch. The model wraps changes in a Begin Patch / End Patch block and expresses edits as diff hunks with minimal context, avoiding the need to reproduce the full unchanged block. The plugin supports multiple ordered hunks, add, update, move, and delete operations, failure-atomic preflight and rollback, and native DSH diff rendering. Unloading it restores the original tool set.

Built for developers who edit code frequently inside DeepSeek Harness and are frustrated by exact-match failures, invisible-character mismatches, and fragile multiline replacement. The project is pre-1.0, targets the DSH 0.1.x range, and works across desktop, web, and headless Profiles.