A guide to configuring Moon, a build and task tool for monorepos. A monorepo keeps multiple related projects in one repository, and Moon can define their tasks, toolchains, queries, and caches.

Use it to configure Moon 2.0 task files, project tags, task inheritance, language toolchains, project queries, and task caching.

It helps keep task configuration consistent across projects and avoids repeating setup. It also explains how to run selected or affected tasks and use cached results.

moon-guide — Skill for Claude Code by xonovex/platform

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 xonovex/platform --skill moon-guide

Clone the repo

git clone --depth 1 https://github.com/xonovex/platform

Made for: Claude Code.

Or install xonovex-platform, the plugin that ships this one along with the rest of its 4 skills.

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/xonovex/platform/moon-guide/github.svg)](https://agentmods.dev/skills/xonovex/platform/moon-guide)

Your own site

<a href="https://agentmods.dev/skills/xonovex/platform/moon-guide"><img src="https://agentmods.dev/badge/skills/xonovex/platform/moon-guide/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/xonovex/platform/moon-guide"><img src="https://agentmods.dev/badge/skills/xonovex/platform/moon-guide.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 60 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 798 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 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.

Model	Per session	Once invoked
Fable 5.1	$0.00060	$0.00798
Opus 5.5	$0.00024	$0.00319
Sonnet 5.5	$0.00012	$0.00160
Haiku 4.5	$0.00006	$0.00080

Measured 7d ago against content hash ed24c00da879, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

moon-guide 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 7d 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.

packages/runtime/plugin/plugin-platform/skills/moon-guide/SKILL.md · 49 lines

How it starts

The opening of the file, as written. The whole thing — 49 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Moon Build System Guidelines

Define reusable Moon tasks through tags, explicit dependencies, and declared cache inputs and outputs.

Requirements

Moon ≥ 2.0, Node.js for JavaScript/TypeScript projects.
Migration from v1: Run moon migrate v2 to automate configuration updates.

Essentials

Task configuration - Define in .moon/tasks/*.yml for auto-inheritance, see references/task-configuration.md, references/task-inheritance.md
Tags - Use for categorization, filtering, boundaries, inheritance, see references/tag-based-filtering.md
Execution - project:task, #tag:task, :task (all), --query, --affected
Querying - Query projects/tasks by tags, language, or query language, see references/query-language.md
Configuration - Projects use moon.yml, workspace uses .moon/workspace.yml
Toolchains - Moon manages language toolchains, configured in .moon/toolchains.yml (plural in v2)
Caching - Built-in task caching with output definitions, see references/task-configuration.md

Moon 2.0 Key Changes

command vs script - Use script: for shell features (pipes, redirects, chaining); command: for simple executables only
Shell by default - Tasks run in shell by default (bash on Unix, pwsh on Windows)
Deep merging - Configs merge sequentially (not shallow), fileGroups combine instead of replace
Renamed settings - platform → toolchains, type → layer, toolchain.yml → toolchains.yml
Env var syntax - $VAR substitutes empty string (not syntax fallback); use ${VAR:-default} for defaults

Gotchas

Task inheritance flows from .moon/tasks/*.yml (by tag/language) → project moon.yml: overriding requires the same task key in the project file
Implicit task dependencies via deps: are project-scoped: cross-project deps need <project>:<task> syntax
moon ci skips persistent server tasks (preset: 'server') and any task with options.runInCI: false, never gate CI-only checks behind a non-CI task
Project tags drive task inheritance; misspelling a tag silently disables the inherited tasks for that project

Read the full file on GitHub · 49 lines

Files

What ships with it

11 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.

7d ago Changed · +2 lines ed24c00da879
1mo ago First seen · 47 lines · 60 tokens per session scan A b398461b083b

Subscribe to this mod's changes

moon-guide is a skill published in the GitHub repository xonovex/platform (6 stars, last pushed 5d ago), licensed MIT. It adds 60 tokens to every session and 798 once invoked, about $0.0002 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 2026-09-08.

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