prometheas-labs Moon v2 — Project Configuration
Reference for moon.yml project configuration files.
Project Metadata
$schema: 'https://moonrepo.dev/schemas/project.json'
layer: application # application | library | tool | automation | configuration | scaffolding
language: typescript # typescript | javascript | php | python | rust | go | bash
stack: frontend # frontend | backend | systems | infrastructure | data
Key v2 change: type: was renamed to layer:.
File Groups
Named file pattern collections referenced by tasks via @group(name).
fileGroups:
sources:
- 'src/**/*.ts'
- '!src/**/*.test.ts'
configs:
- 'package.json'
- 'tsconfig.json'
Use @group(sources) in task inputs — not bare sources or @globs().
Tasks
command vs script
| Use | When |
|---|---|
command: |
Single executable, no shell features. Supports inheritance merging. |
script: |
Pipes, redirects, chaining (&&, ||, ;). No inheritance merging. |
tasks:
lint:
command: 'eslint src/'
inputs: ['@group(sources)', '@group(configs)']
options:
cache: true
runInCI: affected
build:
script: 'rm -rf dist && tsc --build'
inputs: ['@group(sources)']
outputs: ['dist/']
deps: ['~:codegen']
Task Fields
| Field | Purpose |
|---|---|
command / script |
What to run |
inputs |
Files that determine if task needs re-running |
outputs |
Files/directories produced (enables caching) |
deps |
Tasks to run first: 'project:task' or '~:task' (same project) |
env |
Environment variables: { NODE_ENV: 'production' } |
options |
Execution modifiers (see below) |
preset |
server (long-running) or utility (interactive, no cache) |
Common Options
| Option | Default | Purpose |
|---|---|---|
cache |
true |
Enable output caching |
runInCI |
affected |
When to run in CI: always, affected, false, only, skip |
persistent |
false |
Long-running process (dev servers) |
shell |
true |
Execute within shell |
retryCount |
0 |
Retry on failure |
outputStyle |
— | buffer, buffer-only-failure, stream, hash, none |
runFromWorkspaceRoot |
false |
Run from monorepo root instead of project |
Pitfalls
| Mistake | Fix |
|---|---|
type: application |
Use layer: application (v2 rename) |
command: 'a && b' |
Use script: for shell features |
inputs: ['sources'] |
Use inputs: ['@group(sources)'] |
Missing outputs on cacheable task |
Define outputs or caching has no effect |
platform: node |
Use toolchains field or omit (auto-detected) |