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Agent skill

Kmp Starter Core Rules

by DevAtrii in DevAtrii/Kmp-Starter-Template

Non-negotiable rules for building on the KMP Starter Template — priority order, Golden Rule, terminology, state vs UI-state boundaries, visibility, demo removal, snackbars, and UI weight.

MITAuto-check passedDevelopment

Install Kmp Starter Core Rules

skills CLI
$ npx skills add DevAtrii/Kmp-Starter-Template --skill kmp-starter-core-rules -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install DevAtrii/Kmp-Starter-Template kmp-starter-core-rules --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/DevAtrii/Kmp-Starter-Template.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/kmp-starter/core-rules .claude/skills/kmp-starter-core-rules && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
kmp-starter-core-rules
GitHub stars
167
Token cost
~574 tokens
SKILL.md length
256 words
Files
1
Skills in repo
23
Repo updated
First seen
Licence
MIT

At a glance

Non-negotiable rules for building on the KMP Starter Template — priority order, Golden Rule, terminology, state vs UI-state boundaries, visibility, demo removal, snackbars, and UI weight.

  • Works in 6 steps: Starter Template documentation (live… → Existing project structure → Existing feature implementations → …
  • Tasks that involve Project scaffolding
  • SKILL.md covers Priority order (Starter always…, Golden Rule, Terminology (Starter wins over… and State guidelines, plus 4 more sections
  • Reaches starter.atherio.dev

What it does

Kmp Starter Core Rules is an agent skill from DevAtrii/Kmp-Starter-Template. Non-negotiable rules for building on the KMP Starter Template — priority order, Golden Rule, terminology, state vs UI-state boundaries, visibility, demo removal, snackbars, and UI weight. Read before writing any code.

Its SKILL.md is about 570 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Development, covering Project scaffolding. The repository describes itself as: Starter template is a multi-module KMP boilerplate for Android & iOS with clean architecture and high-quality code. It handles basics like remote config, in-app purchases, and… The licence is MIT.

When your agent uses it

  • Tasks that involve Project scaffolding

Example prompts

  • “/kmp-starter-core-rules”

Workflow steps

6 steps, taken from the first numbered list in SKILL.md.

  1. Starter Template documentation (live site https://starter.atherio.dev)
  2. Existing project structure
  3. Existing feature implementations
  4. Existing core modules (features/core/*)
  5. General KMP / Compose best practices
  6. General Android best practices

What it can do on your machine

Read from SKILL.md and the folder at commit a8f7b27. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Hosts in commands or code, which the agent is likely to contact:

    • starter.atherio.dev

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Kmp Starter Core Rules loads about 574 tokens when it runs. Until then it costs about 60 tokens; SKILL.md has 256 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~60
When it runs · the whole SKILL.md, loaded when a task matches
~574

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from DevAtrii/Kmp-Starter-Template at commit a8f7b27, republished under its MIT licence (© DevAtrii). 256 words, ~574 tokens.

Download SKILL.mdSave it as .claude/skills/kmp-starter-core-rules/SKILL.md (or your agent's skills folder).
name
kmp-starter-core-rules
description
Non-negotiable rules for building on the KMP Starter Template — priority order, Golden Rule, terminology, state vs UI-state boundaries, visibility, demo removal, snackbars, and UI weight. Read before writing any code.
author
DevAtrii
license
MIT

Core Rules

Priority order (Starter always wins)

  1. Starter Template documentation (live site https://starter.atherio.dev)
  2. Existing project structure
  3. Existing feature implementations
  4. Existing core modules (features/core/*)
  5. General KMP / Compose best practices
  6. General Android best practices

When these conflict, the higher item wins. Prefer consistency over creativity.

Golden Rule

Before creating any new utility, helper, manager, abstraction, base class, datastore, file manager, navigation system, platform API, wrapper, or common component — search the Starter Template first. Reuse → extend → configure. Never duplicate.

Terminology (Starter wins over other frameworks)

Other frameworks call itRename to
IntentAction
EffectEvent
MutationAction
UseCaseLogic

Use Action for UI → ViewModel, Event for ViewModel → UI, Logic for use cases. Keep this naming everywhere.

State guidelines

State holds application data, not transient UI state.

Store in State: user, files, notes, selected image bytes, loading, filters, repository data, search query, pagination.

Never store in State: dialog visibility, snackbar visibility, bottom-sheet visibility, dropdown expanded state, animation states, focus states. These live inside Composables.

Visibility

Mark anything not required outside a module internal. Only expose the public API other modules need.

Snackbars

Do not show a snackbar for every successful action. If the UI already communicates the result, skip it. Snackbars are for errors, important feedback, and undo actions.

UI weight

Keep Composables lightweight — render state, send actions, observe events. Heavy work belongs in ViewModels or Logics.

Remove demo content (only)

Remove Starter demo content: Welcome Screen, Starter File Manager demo, sample placeholder screens, unused demo resources. Keep the infrastructure; remove only demo content.

© DevAtrii, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in .agents/skills/kmp-starter/core-rules of DevAtrii/Kmp-Starter-Template.

Open the folder on GitHubat commit a8f7b27

Compare with similar skills

Kmp Starter Core Rules next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Kmp Starter Core Rules compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Kmp Starter Core Rules this skillDevAtrii/Kmp-Starter-Template167—~574Automated safety check: PassMIT
Trellis Spec Bootstarpanjiemo/SunnyBeach1787 repos~740Automated safety check: PassApache-2.0
Design Firstgetsentry/sentry-react-native1.8k—~1.6kAutomated safety check: PassMIT
Frb Code Generationfzyzcjy/flutter_rust_bridge5.4k—~1.5kAutomated safety check: PassMIT
Project Scaffoldingaiskillstore/marketplace430—~2kAutomated safety check: PassNone
Rustc Basicsmohitmishra786/low-level-dev-skills253—~1.5kAutomated safety check: PassMIT

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Categories

Questions about Kmp Starter Core Rules

What does Kmp Starter Core Rules do?

Non-negotiable rules for building on the KMP Starter Template — priority order, Golden Rule, terminology, state vs UI-state boundaries, visibility, demo removal, snackbars, and UI weight. Kmp Starter Core Rules is an agent skill from DevAtrii/Kmp-Starter-Template. Non-negotiable rules for building on the KMP Starter Template — priority order, Golden Rule, terminology, state vs UI-state boundaries, visibility, demo removal, snackbars, and UI weight.

When should I use Kmp Starter Core Rules?

Kmp Starter Core Rules fits situations like: tasks that involve Project scaffolding.

How do I install Kmp Starter Core Rules in Claude Code?

Run `npx skills add DevAtrii/Kmp-Starter-Template --skill kmp-starter-core-rules -a claude-code`. Or copy the skill folder (.agents/skills/kmp-starter/core-rules in DevAtrii/Kmp-Starter-Template) into .claude/skills/kmp-starter-core-rules in your project. Claude Code loads it when a task matches its description.

How do I install Kmp Starter Core Rules in Codex?

Run `npx skills add DevAtrii/Kmp-Starter-Template --skill kmp-starter-core-rules -a codex`. Or copy the skill folder (.agents/skills/kmp-starter/core-rules in DevAtrii/Kmp-Starter-Template) into .agents/skills/kmp-starter-core-rules in your project. Codex loads it when a task matches its description.

Can I use Kmp Starter Core Rules in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add DevAtrii/Kmp-Starter-Template --skill kmp-starter-core-rules -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/kmp-starter-core-rules, .gemini/skills/kmp-starter-core-rules, .github/skills/kmp-starter-core-rules and .opencode/skills/kmp-starter-core-rules in your project.

What does Kmp Starter Core Rules need to run?

SKILL.md names no scripts, command-line tools or credentials: Kmp Starter Core Rules is instructions for the agent only.

Does Kmp Starter Core Rules access the network?

SKILL.md names 1 domain. In commands or code: starter.atherio.dev; the agent is likely to contact it when it follows the instructions. This is read from the text; nothing was executed.

Is Kmp Starter Core Rules safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Kmp Starter Core Rules use?

Kmp Starter Core Rules is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Kmp Starter Core Rules use?

About 574 tokens (SKILL.md is roughly 2.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Kmp Starter Core Rules?

Skills that share tags, products or a category with Kmp Starter Core Rules: Trellis Spec Bootstarp (anjiemo/SunnyBeach, 178 stars), Design First (getsentry/sentry-react-native, 1.8k stars), Frb Code Generation (fzyzcjy/flutter_rust_bridge, 5.4k stars) and Project Scaffolding (aiskillstore/marketplace, 430 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Kmp Starter Core Rules?

DevAtrii (a GitHub user) maintains it in DevAtrii/Kmp-Starter-Template, which has 167 GitHub stars. The repository holds 23 skills in this directory. The repository was last updated on September 1, 2026.

Source: DevAtrii/Kmp-Starter-Template on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.