dev-specialisms:fly-deploy

dev-specialisms:fly-deploy is a skill for Claude Code from aaronbassett/agent-foundry. It costs 103 tokens per session (3,210 once invoked), scanned A, original, MIT.

A deployment guide for putting JavaScript, Rust, Python, or Docker-based applications on Fly.io, a hosting platform for running applications on remote servers. It also covers related databases, storage, secrets, domains, and deployment automation.

In plain words
What is it for?
Use it to deploy new or existing applications, configure databases and storage, manage secrets and domains, create preview environments, set up GitHub Actions, and troubleshoot deployments.
Why use it?
It gives you a defined path through the setup work and common deployment or runtime problems involved in putting an application online.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the dev-specialisms plugin — 3 skills, 1 plugin shipped together

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/aaronbassett/agent-foundry/fly-deploy
Any agent
npx skills add aaronbassett/agent-foundry --skill fly-deploy
Clone the repo
git clone --depth 1 https://github.com/aaronbassett/agent-foundry

Made for: Claude Code.

Or install dev-specialisms, the plugin that ships this one along with the rest of its 3 skills, 1 plugin.

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 dev-specialisms:fly-deploy

README.md
[![agentmods](https://agentmods.dev/badge/skills/aaronbassett/agent-foundry/fly-deploy.svg)](https://agentmods.dev/skills/aaronbassett/agent-foundry/fly-deploy)
Your own site
<a href="https://agentmods.dev/skills/aaronbassett/agent-foundry/fly-deploy"><img src="https://agentmods.dev/badge/skills/aaronbassett/agent-foundry/fly-deploy.svg" alt="Measured on agentmods" height="20"></a>
Per session 103 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,210 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 5.1 $0.00103 $0.03210
Opus 5 $0.00051 $0.01605
Sonnet 5 $0.00021 $0.00642
Haiku 4.5 $0.00010 $0.00321

Measured 5d ago against content hash 8f331b820bfa, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

dev-specialisms:fly-deploy scanned grade A with 1 finding 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 5d ago.

The scan reads SKILL.md. This mod also ships 3 executable files (scripts/init_postgres.sh, scripts/setup_review_apps.sh, scripts/setup_tigris.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

fly ssh console -C "curl http://localhost:8080/health"
plugins/dev-specialisms/skills/fly-deploy/SKILL.md · 499 lines

How it starts

The opening of the file, as written. The whole thing — 499 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Fly.io Deployment

Quick MVP deployment to fly.io with support for multiple languages, databases, GitHub integration, and production-ready configurations.

When to Use This Skill

Use this skill when you need to:

  • Deploy a new application to fly.io quickly
  • Migrate existing applications to fly.io
  • Set up databases (Managed Postgres, SQLite with volumes, or Tigris object storage)
  • Configure secrets and environment variables
  • Add custom domains with SSL certificates
  • Set up GitHub Actions for continuous deployment
  • Create PR review apps (preview environments)
  • Troubleshoot deployment or runtime issues
  • Optimize fly.io configurations for cost and performance

Quick Start

New Application

# From your app directory
fly launch

# Follow interactive prompts:
# - Choose app name
# - Select region
# - Configure resources
# - Deploy immediately or create config only

Existing Application

# Deploy app with existing fly.toml
fly deploy

# Build on fly.io servers (recommended for CI/CD)
fly deploy --remote-only

Workflow Decision Tree

1. Choose Your Starting Point

New App (No fly.toml) → See: Deploying New Applications

Existing fly.io App → See: Deploying Existing Applications

Migrating from Another Platform → See: references/deployment-workflow.md + Language-specific guides

2. Choose Your Language/Framework

Navigate to the appropriate language guide:

JavaScript/Node.js:

Python:

Read the full file on GitHub · 499 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. 5d ago First seen · 499 lines · 103 tokens per session scan A 8f331b820bfa

Subscribe to this mod's changes

dev-specialisms:fly-deploy is a skill published in the GitHub repository aaronbassett/agent-foundry (4 stars, last pushed 20d ago), licensed MIT. It adds 103 tokens to every session and 3,210 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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