tomevault-io Gemini Review
Use Gemini CLI to get a second opinion. No model selection step — Gemini CLI handles that automatically. All execution goes through review.js.
Locating review.js
Find the script with:
printf '%s\n' ~/.claude/plugins/cache/second-opinion-skill/second-opinion-skill/*/bin/review.js 2>/dev/null | sort -V | tail -1
Store the result as REVIEW_SCRIPT. Do not call gemini directly.
Determining what to review
Pass the appropriate flag to review.js (it handles fetching and embeds diff/file content inline before the prompt):
| What to review | Flag |
|---|---|
| Unstaged changes | --diff=unstaged |
| Staged changes | --diff=staged |
| Last commit | --diff=last-commit |
| Branch vs main | --diff=branch |
| Custom range | --diff="HEAD~3..HEAD" |
| Specific file | --file=<absolute-path> |
| General question | (no flag) |
Running
"$REVIEW_SCRIPT" --engine=gemini --cwd=<repo-path> [--diff=<spec>|--file=<path>] "<review template>"
No model selector needed — Gemini CLI picks automatically. Always use bare --engine=gemini (no :model suffix).
Composing the prompt
For the full guidance on how to compose the prompt — when to embed the user's ongoing task / context (Tier A), when to fall back to default templates (Tier B), and when to use --no-embed for very large diffs (Tier C) — read the second-opinion skill. The default templates live there too.
Safety toggle
By default review.js applies this engine's read-only / sandbox / plan-mode flags. Pass --unrestricted only when the engine genuinely needs to edit files or run commands; review.js will drop the safety flags and log a stderr warning.
Output envelope
review.js wraps every prompt with <<<SECOND_OPINION_START>>> / <<<SECOND_OPINION_END>>> markers and asks the engine to emit its real answer between them. After reading the log file, extract the text between the markers — that is the clean payload, free of reasoning traces and tool noise. Pass --no-wrap to disable.
Capturing output
When review.js runs from an agent harness (non-TTY stdout), engine output is not streamed to stdout. It's written to a temp file, and stdout receives only a banner with the log path. After the command exits, use the Read tool on the path shown after LOG FILE: to get the full Gemini review. Don't pipe to | tail -N / | head -N — the engine output isn't on stdout in this mode. Pass --log=<path> for a known location; pass --log=- to restore tee-to-stdout behavior.
Presenting results
Show Gemini's full response under a ## Gemini's Take heading. Don't filter or summarize — let the raw review speak. If Gemini raises issues that need fixing, address them and note what changed.
Source: srwbsw/second-opinion-skill — distributed by TomeVault.