Publish harness and TUI open-source

initial sync from the monorepo

crates/codegen/xai-grok-shell/changelogs/0.2.51.md

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+# 0.2.51
+
+## Breaking Changes
+
+- **`grok mcp add`** now accepts positional arguments (e.g. `grok mcp add filesystem -- npx ...`), supports --scope project, and adds -e/-H flags for env/headers.
+
+## Features
+
+- **Mermaid flowcharts** now render subgraph blocks as titled frames with correct internal and cross-boundary edges.
+- **Class diagrams** in Mermaid now render as proper UML boxes with attributes, methods and inheritance arrows instead of raw source.
+- **Permission prompts** now accept a double-click on an option to submit it, matching the existing Enter and number-key shortcuts.
+- **New /code-review slash command** now ships with the CLI and is always available.
+
+## Bug Fixes
+
+- **Plan mode exit reminders** no longer appear after the model has already started implementing the plan.
+- **Expanded thinking blocks** in scrollback now remain expanded when the agent finishes them.
+- **`grok update`** no longer downloads the same binary twice when multiple updaters or leader checks run concurrently.
+- **Background task IDs** after /compact are now shown verbatim so the model can reference them correctly in later tool calls.
+- **Typing /** while scrollback is focused now focuses the prompt and opens the slash-command dropdown.
+- **Dashboard empty state** is now a single hint line; dispatch and peek placeholders appear only when unfocused.
+- **Fixed memory leaks** that could cause the CLI to use tens of gigabytes during long sessions with many tool calls.
+- **Login on SSH or headless machines** now tells you when the browser cannot be opened automatically and shows the URL to visit manually.
+- **Fixed git clone failures** on Windows when the CLI tries to clone marketplace plugins into ~/.grok.
+
+## Performance
+
+- **Large code blocks** inside lists no longer cause multi-second UI stalls while streaming responses.
+