Verify

How to run (transparent)

1. Take the absolute Base directory for this skill from the Skill tool

(the folder that contains this skill's SKILL.md and run.mjs).

1. Set SKILL_BASE to that path. Do not invent versioned cache paths.
2. Always invoke the companion only through this skill's runner:

SKILL_BASE=''
# Required for completion notifications (plugin/references/execution-context.md):
export GROK_COMPANION_EXECUTION_CONTEXT=foreground   # or background
node "$SKILL_BASE/run.mjs"  [args...]

run.mjs finds the plugin install from its own location and runs scripts/grok-companion.mjs. No CLAUDE_PLUGIN_ROOT / PLUGIN_ROOT required.

If the host already exported CLAUDE_PLUGIN_ROOT or PLUGIN_ROOT, you may call node "$CLAUDE_PLUGIN_ROOT/scripts/grok-companion.mjs" instead; prefer "$SKILL_BASE/run.mjs" whenever the Skill tool loaded this skill.

Return companion stdout verbatim. Never put free-text in --task "..."; use --task-file - with a single-quoted heredoc.

Run a Grok verify through the hardened wrapper and relay its result envelope. verify inspects and tests a change in an EXISTING worktree (typically one a prior code run produced), has no source-editing tools, and always ends with a machine-readable pass / fail / inconclusive verdict plus evidence.

Raw slash-command arguments: $ARGUMENTS

Required wrapper flags (copy exactly, substitute only placeholder values):

• --worktree is required.
• Exactly one of --task or --task-file is required.
• Preserve the user's arguments exactly. Do not strip, add, or reorder flags.

Do not invent a flag that is not in the argument-hint.

• Shell-injection safety for --task : the task is free text you must NEVER

place in a shell-evaluated position. $(...)/backticks inside a double-quoted --task "..." run locally BEFORE the wrapper validates them. When the arguments carry a --task , deliver that text on STDIN with --task-file - and a SINGLE-QUOTED heredoc so the shell passes it byte-for-byte; the companion stages it into a temp file for the wrapper.

• Shell-injection safety for flag VALUES (--worktree, a --task-file ,

--model, --timeout, --max-turns, and EVERY other value you substitute from $ARGUMENTS): wrap each substituted value in SINGLE quotes, for example --worktree ''. Single quotes stop the shell from evaluating $(...)/backticks, so a hostile value reaches the companion as one literal argv token and the wrapper validates it (worktree path resolution + escape guards). An unquoted OR double-quoted value would be command-substituted locally BEFORE the wrapper ever sees it -- the same injection class as an unsafe --task "...".

NO web access:

• verify NEVER accepts --web - independent verification stays hermetic by

design. If the user asks for --web on a verify run, do NOT add it; explain that verify is hermetic and offer reason --web or review --web instead.

Run it as one Bash call and relay the result. When the arguments carry a --task , route that text through STDIN so it is never shell-evaluated:

export GROK_COMPANION_EXECUTION_CONTEXT=foreground
node "$SKILL_BASE/run.mjs" verify --worktree '' [other non-task flags from $ARGUMENTS, each substituted value single-quoted] --task-file - 
GROK_TASK

When the arguments already use --task-file , drop the heredoc and pass every flag as single-quoted argv tokens:

export GROK_COMPANION_EXECUTION_CONTEXT=foreground
node "$SKILL_BASE/run.mjs" verify --worktree '' --task-file '' [other non-task flags from $ARGUMENTS, each substituted value single-quoted]

• Return the command stdout envelope VERBATIM. Do not paraphrase, summarize, or

add commentary before or after it. Preserve the exit status. The verdict lives in the envelope's verifier.verdict; do not restate it as your own conclusion in place of the raw envelope.

If the companion prints an actionable "could not locate the Grok wrapper" message instead of an envelope, tell the user to run /grok:setup.

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: sfourdrinier
• Source: sfourdrinier/grok-skills
• License: MIT

Install and usage instructions live in the source repository linked above.