dsh-2origin: Providing 2Origin State Projection, Semantic Diff, and Immutable Freeze for DeepSeek Harness

dsh-2origin is a third-party plugin for DeepSeek Harness (DSH), designed to use the task.origin.json state file as a verifiable evidence object, replacing chat logs as the basis for task handover. The plugin adheres to the "evidence-first" principle and provides three core features: state projection, semantic diff, and immutable freezing. First, the status command outputs a compact projection, counts, and hash consistency to confirm readability; second, the diff command performs a read-only semantic comparison of candidate JSON files, automatically excluding non-content fields such as version and time to eliminate false changes; finally, the freeze command creates a content-addressed immutable snapshot based on observed hashes, ensuring exclusive creation and read-back verification. The plugin offers both a CLI and a Codex plugin surface, along with