What is loop-engineer?

A guided workflow for Gemini CLI, a command-line coding assistant, that asks three questions and coordinates several specialised agents until a goal is met.

Use it to run an autonomous team workflow for a defined engineering goal in Gemini CLI.

It divides a large task among agents for research, planning, execution, checking, auditing, and memory keeping.

loop-engineer — Skill for Claude Code by vibhasdutta

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add vibhasdutta/loop-engineer --skill gemini

Clone the repo

git clone --depth 1 https://github.com/vibhasdutta/loop-engineer

Made for: Claude Code.

Or install loop-engineer, the plugin that ships this one along with the rest of its 9 skills, 1 command, 15 agents, 1 MCP server.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/vibhasdutta/loop-engineer/gemini/github.svg)](https://agentmods.dev/skills/vibhasdutta/loop-engineer/gemini)

Your own site

<a href="https://agentmods.dev/skills/vibhasdutta/loop-engineer/gemini"><img src="https://agentmods.dev/badge/skills/vibhasdutta/loop-engineer/gemini/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/vibhasdutta/loop-engineer/gemini"><img src="https://agentmods.dev/badge/skills/vibhasdutta/loop-engineer/gemini.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 131 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 3,092 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin unknown No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00131	$0.03092
Opus 5.5	$0.00052	$0.01237
Sonnet 5.5	$0.00026	$0.00618
Haiku 4.5	$0.00013	$0.00309

Measured 1mo ago against content hash 17540c817bb0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

loop-engineer scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

platforms/gemini/SKILL.md · 219 lines

The source is not reproduced here

No licence file

Read it on GitHub

Files

What ships with it

44 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

1mo ago First seen · 219 lines · 131 tokens per session scan A 17540c817bb0

Subscribe to this mod's changes

loop-engineer is a skill published in the GitHub repository vibhasdutta/loop-engineer (3 stars, last pushed 3mo ago), with no licence file. It adds 131 tokens to every session and 3,092 once invoked, about $0.0005 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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