A setup generator for the shared infrastructure of Flutter apps, including themes, navigation, services, error types, constants, and state providers. Flutter is a toolkit for building apps from one codebase.

Creating a Flutter app's theme and router, connecting storage or Supabase, setting up network access, defining errors, and configuring bottom navigation.

It prepares the app-wide foundations that individual features depend on, before authentication or other features are added.

core — Skill by launch52-ai

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.

agentmods

npx agentmods add skills/launch52-ai/flutter-template/core

Any agent

npx skills add launch52-ai/flutter-template --skill core

Clone the repo

git clone --depth 1 https://github.com/launch52-ai/flutter-template

Made for: Claude Code, Codex.

Per session 52 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,378 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. Scan, not verified.

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	$0.00052	$0.01378
Opus 5	$0.00026	$0.00689
Sonnet 5	$0.00010	$0.00276
Haiku 4.5	$0.00005	$0.00138

Measured yesterday against content hash e7b3d778b365, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

core 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 yesterday.

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.

.claude/skills/core/SKILL.md · 159 lines

How it starts

The opening of the file, as written. The whole thing — 159 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Core - Infrastructure Generation

Generates the core infrastructure that all features depend on.

When to Use This Skill

After /init completes
Before adding any features or /auth
Setting up app-wide infrastructure
User asks to "generate core", "create infrastructure", or "setup theme/router"

What This Skill Creates

lib/app.dart - Root app widget with MaterialApp.router
lib/core/theme/ - AppColors, AppTypography, AppTheme
lib/core/router/ - GoRouter configuration
lib/core/services/ - SecureStorage, SharedPrefs, Supabase, iOS network permission
lib/core/errors/ - Typed failures and exceptions
lib/core/constants/ - App constants, legal URLs, storage keys, debug flags
lib/core/network/ - Dio client (if custom API)
lib/core/navigation/ - StatefulShellRoute (if bottom nav)
lib/core/providers.dart - Core Riverpod providers

Workflow

Phase 1: Gather Requirements

Use AskUserQuestion to confirm settings from /init:

Primary Color (hex, from /init or ask)
Theme Mode (light/dark/both)
Use Supabase? (from /init)
Use Custom API? (from /init)
Bottom Navigation? (yes/no - determines shell creation)
Privacy Policy URL? (can be placeholder, required before release)
Terms of Service URL? (can be placeholder, required before release)

Phase 2: Create Directory Structure

mkdir -p lib/core/{constants,errors,network,router,navigation,services,theme,utils,widgets}
mkdir -p lib/features

Phase 3: Generate Files

Copy from reference/ directories and customize:

Category	Files	Notes
`theme/`	app_colors, app_typography, app_theme	Customize primary color
`services/`	secure_storage, shared_prefs, ios_network_permission	Always
`services/`	supabase_service	If Supabase = yes
`network/`	dio_client	If Custom API = yes
`router/`	app_router	Customize routes
`navigation/`	main_shell	If bottom nav = yes
`errors/`	failures, exceptions	Always
`constants/`	app_constants, legal_constants, storage_keys, debug_constants	Always
`utils/`	legal_utils	Always
root	providers.dart	Customize based on services

Read the full file on GitHub · 159 lines

Files

What ships with it

23 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.

yesterday First seen · 159 lines · 52 tokens per session scan A e7b3d778b365

Subscribe to this mod's changes

core is a skill published in the GitHub repository launch52-ai/flutter-template (2 stars, last pushed 6mo ago), licensed MIT. It adds 52 tokens to every session and 1,378 once invoked, about $0.0003 per session on Opus 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.

Databases Planning Security boilerplate claude claude-code flutter template

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