resonance-engineering-mobile

resonance-engineering-mobile is a skill for Claude Code, Codex from manusco/resonance. It costs 64 tokens per session (1,095 once invoked), scanned A, original, MIT.

A mobile-app architecture guide for React Native and Flutter, covering apps that work without an internet connection, respond naturally to touch, and meet Apple and Google store rules.

In plain words
What is it for?
Use it to plan local data storage and syncing, improve animations with spring motion, check offline behavior, and prepare an app-store compliance checklist.
Why use it?
It helps avoid apps that depend on a network, feel stiff when touched, or fail store checks. It also addresses mobile limits such as battery use and one-handed operation.

Skill for Claude CodeCodex

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/manusco/resonance/mobile
Any agent
npx skills add manusco/resonance --skill mobile
Clone the repo
git clone --depth 1 https://github.com/manusco/resonance

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 resonance-engineering-mobile

README.md
[![agentmods](https://agentmods.dev/badge/skills/manusco/resonance/mobile.svg)](https://agentmods.dev/skills/manusco/resonance/mobile)
Your own site
<a href="https://agentmods.dev/skills/manusco/resonance/mobile"><img src="https://agentmods.dev/badge/skills/manusco/resonance/mobile.svg" alt="Measured on agentmods" height="20"></a>
Per session 64 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,095 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.

ModelPer sessionOnce invoked
Fable 5 $0.00064 $0.01095
Opus 5 $0.00032 $0.00548
Sonnet 5 $0.00013 $0.00219
Haiku 4.5 $0.00006 $0.00110

Measured 4d ago against content hash 4452f4cef20b, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

resonance-engineering-mobile 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 4d 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.

.agents/skills/engineering/mobile/SKILL.md · 73 lines

How it starts

The opening of the file, as written. The whole thing — 73 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/resonance-engineering-mobile: build apps that feel physical and work without internet

Role: guardian of the handheld experience. Input: A mobile app concept, screen spec, or animation complaint. Output: A local-first DB schema, sync strategy, spring animation config, or store compliance checklist. Definition of Done: App opens in < 200ms to interactive UI. Frame rate is 60fps (120fps on ProMotion). Primary actions are reachable with one thumb. App does not crash or show a spinner when entering Airplane Mode.

Mobile is not small web. It is a touch-based, battery-constrained, network-hostile environment. Treat the network as a "nice-to-have" feature, not a dependency. A touch is a physical impulse. It demands a physical response.

Jobs to Be Done

Job Trigger Output
Architecture New mobile app Local-First DB schema (SQLite/WatermelonDB) + sync strategy
Animation "It feels stiff" Spring configurations replacing all linear tweens
Compliance Store submission Passed Apple/Google guideline checklist
Offline Audit "It breaks without internet" Offline-first implementation plan

Out of Scope

  • Web responsive design (delegate to resonance-engineering-frontend).

Core Principles

  1. Offline-First: Read/Write to local DB first. Background sync later. The UI never blocks on network requests.
  2. Touch Physics: Use springs, not linear tweens. Digital objects have mass and friction. Tap = Scale down (0.95). Swipe = Velocity decay. Modal = Drag-to-dismiss.
  3. Thumb Zone: Primary actions must be reachable with one hand. The bottom 40% of the screen is the safe zone.

Cognitive Frameworks

Offline-First Architecture

Every screen reads from the local DB. Mutations write to local first, queue a background sync, and resolve conflicts with a deterministic strategy (last-write-wins, server-wins, or merge). The user never waits for a network response to see UI.

Read the full file on GitHub · 73 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. 4d ago First seen · 73 lines · 64 tokens per session scan A 4452f4cef20b

Subscribe to this mod's changes

resonance-engineering-mobile is a skill published in the GitHub repository manusco/resonance (37 stars, last pushed 2d ago), licensed MIT. It adds 64 tokens to every session and 1,095 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 2026-08-30.

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