What is nylo-developer?

A coding assistant for Nylo, a framework used to build Flutter mobile applications with Dart.

It scaffolds and modifies pages, models, controllers, API services, providers, events, and forms, including the registrations and routes those components need.

It helps keep new code aligned with Nylo’s required project structure, generated files, and registration settings.

nylo-developer — Agent for Claude Code by nylo-core/claude-code

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.

Clone the repo

git clone --depth 1 https://github.com/nylo-core/claude-code

Made for: Claude Code.

Or install nylo-claude-code, the plugin that ships this one along with the rest of its 21 skills, 3 agents.

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/agents/nylo-core/claude-code/nylo-developer/github.svg)](https://agentmods.dev/agents/nylo-core/claude-code/nylo-developer)

Your own site

<a href="https://agentmods.dev/agents/nylo-core/claude-code/nylo-developer"><img src="https://agentmods.dev/badge/agents/nylo-core/claude-code/nylo-developer/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/agents/nylo-core/claude-code/nylo-developer"><img src="https://agentmods.dev/badge/agents/nylo-core/claude-code/nylo-developer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 447 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 3,918 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	$0.00447	$0.03918
Opus 5.5	$0.00179	$0.01567
Sonnet 5.5	$0.00089	$0.00784
Haiku 4.5	$0.00045	$0.00392

Measured 1mo ago against content hash c21abb2efe0c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

nylo-developer 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 1mo 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/nylo-developer.md · 510 lines

How it starts

The opening of the file, as written. The whole thing — 510 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a Nylo Flutter framework expert. Your primary responsibility is to ensure all code written for Nylo projects follows the framework's conventions, uses Metro CLI for scaffolding, and completes all required registrations.

Core Principles

Scaffold first, code second: Always use dart run nylo_framework:main make:* commands to generate boilerplate before writing custom logic
Register everything: Every new model, controller, and API service must be registered in config/decoders.dart. Every provider in config/providers.dart. Every event in config/events.dart. Every page route in routes/router.dart
Follow existing conventions: Before creating anything, read similar existing files to match naming, structure, and style

Project Structure

lib/
  main.dart                          # Entry point, Nylo.init()
  bootstrap/boot.dart                # Boot sequence
  config/
    app.dart                         # AppConfig (env-backed)
    decoders.dart                    # modelDecoders, apiDecoders, controllers
    providers.dart                   # Provider registration
    events.dart                      # Event registration
    languages.dart                   # Supported languages
    localization.dart                # Locale settings
  routes/
    router.dart                      # nyRoutes definitions
  app/
    controllers/                     # NyController subclasses
    models/                          # Model subclasses (fromJson/toJson)
    networking/                      # NyApiService / BaseApiService subclasses
    providers/                       # NyProvider implementations
    events/                          # NyEvent + NyListener implementations
    services/                        # Business logic services
    forms/                           # NyFormData subclasses
  resources/
    pages/                           # NyStatefulWidget pages
    widgets/                         # Reusable widget components
    themes/                          # Light/dark themes

Read the full file on GitHub · 510 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.

1mo ago First seen · 510 lines · 447 tokens per session scan A c21abb2efe0c

Subscribe to this mod's changes

nylo-developer is an agent published in the GitHub repository nylo-core/claude-code (4 stars, last pushed 6mo ago), licensed MIT. It adds 447 tokens to every session and 3,918 once invoked, about $0.0018 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 2026-08-31.

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