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Gemini CLI · understudy-ai | DecimalAI

ai mlby understudy-ai

Gemini CLI

understudy-ai/gemini

Source understudy-ai/understudy ↗License MIT

Gemini CLI for one-shot Q&A, summaries, and generation.

SkillScore100Maintained

Automatic

AI Engineer pack

Last verified 8/19/2026

What it changes

Passed 22 of 22 test cases with the skill, and 12 of 22 without it.

Without skill55%

With skill100%

Checks it passed that the model alone missed

Advises against using --yolo
Command uses gemini executable
Command uses gemini extensions

and 7 more in the full report

10 fixed12 passed either way0 still failing0 broke

Pass-rate lift: +45 pp
Tokens: -57%
Agent turns: 0%
Response time: -64%

Model gemini-3.6-flashMeasured 8/19/2026v122 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/understudy-ai-gemini/SKILL.md https://app.decimal.ai/s/understudy-ai-gemini/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add understudy-ai-gemini, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/understudy-ai-gemini/ and pins it in .decimal/skills.lock

decimalai skills add understudy-ai-gemini

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/understudy-ai-gemini/SKILL.md https://app.decimal.ai/s/understudy-ai-gemini/SKILL.md

Raw file: /s/understudy-ai-gemini/SKILL.md ↗ · machine-readable summary at /s/understudy-ai-gemini.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 10 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 10

Prompt

What is the CLI syntax to install a new extension named developer-tools in Gemini CLI?

What was checked, without and with the skill
Checked	Without skill	With skill
Command uses gemini extensions install developer-tools	Missed	Passed

case-16 · gemini-3.6-flash · 8/19/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md19 linessingle file

Gemini CLI

Use Gemini in one-shot mode with a positional prompt (avoid interactive mode).

Quick start

gemini "Answer this question..."
gemini --model <name> "Prompt..."
gemini --output-format json "Return JSON"

Extensions

List: gemini --list-extensions
Manage: gemini extensions <command>

Notes

If auth is required, run gemini once interactively and follow the login flow.
Avoid --yolo for safety.

Track record

Benchmark

22 / 22

test cases passed, vs 12 / 22 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

understudy-ai / understudy

skills/gemini/SKILL.md

View on GitHub ↗

License MITImported 8/3/2026Version v1

Other skills for the same job

Published skills whose descriptions closely match this one, with their headline benchmark lift.

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

Gemini CLI

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

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