@opentritium/dsh-codex-shim: Route-Aware Codex Environment Simulation for DSH

`@opentritium/dsh-codex-shim` is an MIT-licensed plugin for DeepSeek Harness (DSH), designed to enhance the tool-calling stability of Codex-compatible models such as the GPT-family within DSH. It leverages a routing-aware mechanism to emulate Codex-style prompts, tool vocabularies, results, and WebUI presentation for specified models, rather than functioning as a standalone Codex runtime. The plugin can be enabled in profile configurations, with fine-grained control over applicable models via `modelPatterns` and `modelOverrides`. Core features include registering shims for tools such as `exec_command` and `apply_patch`.