gas-fakes: Skill for Claude Code

.agents/skills/gas-fakes-dev/SKILL.md

gas-fakes-dev is a skill for Claude Code, Codex from brucemcpherson/gas-fakes. It costs 0 tokens per session (7,711 once invoked), scanned A, original, MIT.

A development guide for gas-fakes, a Node.js project that imitates Google Apps Script so Apps Script code can run locally. It covers implementing mocked Google Apps Script classes and testing them with Google API integrations.

In plain words
What is it for?
It is for adding fake Google Apps Script functionality, writing verification tests, and integrating local Node.js code with Google APIs.
Why use it?
It lets developers test and develop Apps Script-related code outside Google's hosted environment. The guide also emphasizes checking the expected behavior of each emulated class or method.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

This is brucemcpherson/gas-fakes's own configuration. It tells Claude Code and Codex how to work on gas-fakes itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything gas-fakes configures →

Not installable: its command points at a path on the author’s own machine, so it runs nowhere else. The line is /Users/brucemcpherson/Documents/repos/gas-fakes/doccreation/gi-fake-all.json.

Reuse

Borrowing it

Nothing to install: this file belongs to brucemcpherson/gas-fakes. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/brucemcpherson/gas-fakes/main/.agents/skills/gas-fakes-dev/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/brucemcpherson/gas-fakes

Made for: Claude Code, Codex.

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.

agentmods badge for gas-fakes-dev

README.md
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Your own site
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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.

agentmods 80×15 button for gas-fakes-dev

Your own site · 80×15
<a href="https://agentmods.dev/skills/brucemcpherson/gas-fakes/gas-fakes-dev"><img src="https://agentmods.dev/badge/skills/brucemcpherson/gas-fakes/gas-fakes-dev.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 7,711 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 2 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00000 $0.07711
Opus 5 $0.00000 $0.03855
Sonnet 5 $0.00000 $0.01542
Haiku 4.5 $0.00000 $0.00771

Measured 10d ago against content hash 6d402d42c3e3, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

gas-fakes-dev scanned grade A with 2 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 10d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- **Network Call Safety**: All network-based commands (e.g., `curl`) MUST include an aggressive timeout (e.g., `--max-time 5` or `--connect-timeout 2`) to prevent processes from hanging and accruing costs in the event of

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

- **Retry Mechanism**: Always implement a retry loop (e.g., 5 retries with 5s delay) for `gcloud iam` commands that depend on recently created resources. A simple busy-wait or `execSync` to a sleep command can be used in
.agents/skills/gas-fakes-dev/SKILL.md · 260 lines

How it starts

The opening of the file, as written. The whole thing — 260 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Summary

This skill enables the agent to assist in the development of the gas-fakes project. The primary objective is to emulate Google Apps Script (GAS) behavior using Node.js and Google APIs, allowing Apps Script code to run in a local Node.js environment.

Usage

  • When you need to implement fake/mock functionality for GAS classes or methods.
  • When creating test scripts to verify the implemented functionalities.
  • When assisting a human developer with Node.js and Google APIs integration.

Workflow

0. Local Model Consultation (Hybrid Hierarchical Delegation)

Before drafting implementation plans, code, tests, refactoring, debugging, analyzing logs, or drafting documentation, Gemini (the Strategic Planner) must first gather all relevant file context, decompose the request into structured atomic sub-tasks, and call the local model (via the omlx:query_local_model tool with the prompt parameter) to generate precise code implementations, detailed tests, refactored components, bug fixes, or documentation updates.

1. Context and Specification Check

Before implementing, verify the specifications of the target Google Apps Script classes and methods. Ensure that the functionality you are about to build aligns with real GAS behavior.

2. Implementation & Focused Execution (CRITICAL DELEGATION GATE)

[!IMPORTANT] ZERO-TOLERANCE DELEGATION GATE You are FORBIDDEN from using write_file or replace to implement logic, write tests, perform refactoring, diagnose/fix debug errors, or draft documentation yourself. MANDATORY SEQUENCE:

  1. Gather context (Research).
  2. CALL omlx/query_local_model with a comprehensive prompt containing specific constraints.
  3. Review and synthesize the output.
  4. Apply changes to files (e.g., in src/, test/, etc.).

EXCEPTION: This mandate only applies if the local model is available and its use has not been explicitly forbidden by the user. If unavailable or forbidden, you may proceed with the tasks using your own weights, but you MUST document the reason in your update_topic.

You MUST explicitly state "Delegating logic generation/task to local Gemma model" in your update_topic summary when transitioning to execution.

Read the full file on GitHub · 260 lines

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.

  1. 10d ago First seen · 260 lines · 0 tokens per session scan A 6d402d42c3e3

Subscribe to this mod's changes

gas-fakes-dev is a skill published in the GitHub repository brucemcpherson/gas-fakes (79 stars, last pushed 3d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 7,711 tokens. A static security scan graded it A with 2 findings (makes network calls, runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-01.

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