Grok CLI 0.2.51 - what changed

What's new

[changed] grok mcp add now accepts positional arguments after -- (e.g. grok mcp add filesystem -- npx ...), supports --scope project, and adds repeatable -e/--env and -H/--header flags.
[new] New /code-review slash command ships with the CLI and is always available.
[changed] Mermaid flowcharts now render subgraph blocks as titled frames with correct internal and cross-boundary edges.
[changed] Mermaid class diagrams now render as proper UML boxes with attributes, methods, and inheritance arrows.
[changed] Permission prompts now accept a double-click on an option to submit it.
[fix] Plan-mode exit reminders no longer appear after the model has already begun implementing the plan.
[fix] Expanded thinking blocks in scrollback remain expanded once the agent finishes them.
[fix] grok update no longer downloads the same binary twice under concurrent updater or leader-check runs.
[fix] Background task IDs after /compact are now shown verbatim.
[fix] Typing / while scrollback is focused now focuses the prompt and opens the slash-command dropdown.
[fix] Dashboard empty state is now a single hint line; dispatch and peek placeholders appear only when unfocused.
[fix] Memory leaks that could grow the CLI to tens of gigabytes over long sessions with many tool calls have been fixed.
[fix] Login on SSH or headless machines now reports when the browser cannot be opened and shows the manual URL.
[fix] Git clone failures on Windows when installing marketplace plugins into ~/.grok have been fixed.
[changed] Large code blocks inside lists no longer cause multi-second UI stalls while streaming.

Under the hood

Shell completions for bash, zsh, fish, elvish, and PowerShell were updated to cover the new mcp add and mcp remove flags and argument forms.
Documentation for MCP server configuration was revised to describe the new command syntax, project scope, and header/env handling.

Upgrade notes

Existing grok mcp add invocations that relied on the old --command/--args/--env style must be updated to the new positional form. Project-scoped MCP entries are now supported via --scope project.

What's new

[changed] grok mcp add now accepts positional arguments after -- (e.g. grok mcp add filesystem -- npx ...), supports --scope project, and adds repeatable -e/--env and -H/--header flags.

[new] New /code-review slash command ships with the CLI and is always available.

[changed] Mermaid flowcharts now render subgraph blocks as titled frames with correct internal and cross-boundary edges.

[changed] Mermaid class diagrams now render as proper UML boxes with attributes, methods, and inheritance arrows.

[changed] Permission prompts now accept a double-click on an option to submit it.

[fix] Plan-mode exit reminders no longer appear after the model has already begun implementing the plan.

[fix] Expanded thinking blocks in scrollback remain expanded once the agent finishes them.

[fix] grok update no longer downloads the same binary twice under concurrent updater or leader-check runs.

[fix] Background task IDs after /compact are now shown verbatim.

[fix] Typing / while scrollback is focused now focuses the prompt and opens the slash-command dropdown.

[fix] Dashboard empty state is now a single hint line; dispatch and peek placeholders appear only when unfocused.

[fix] Memory leaks that could grow the CLI to tens of gigabytes over long sessions with many tool calls have been fixed.

[fix] Login on SSH or headless machines now reports when the browser cannot be opened and shows the manual URL.

[fix] Git clone failures on Windows when installing marketplace plugins into ~/.grok have been fixed.

[changed] Large code blocks inside lists no longer cause multi-second UI stalls while streaming.