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.opencode/skills/deploy/references/platforms/flyio.md

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+# Fly.io
+
+## CLI
+```bash
+# Install (macOS/Linux)
+curl -L https://fly.io/install.sh | sh
+# Install (Windows)
+pwsh -Command "iwr https://fly.io/install.ps1 -useb | iex"
+
+fly auth login
+fly launch       # first time — generates fly.toml
+fly deploy       # deploy
+```
+
+## Config: fly.toml
+```toml
+app = "my-app"
+primary_region = "sjc"
+
+[build]
+
+[http_service]
+  internal_port = 3000
+  force_https = true
+  auto_stop_machines = "stop"
+  auto_start_machines = true
+  min_machines_running = 0
+
+[[vm]]
+  memory = "256mb"
+  cpu_kind = "shared"
+  cpus = 1
+```
+
+## Detection
+- `fly.toml` in project root
+
+## Free Tier
+- No persistent free tier for new accounts
+- One-time trial credit only
+- Legacy Hobby: 3x shared VMs + 3GB volume
+
+## Cost Optimize
+- `auto_stop_machines = "stop"` + `min_machines_running = 0`
+- Avoids idle charges for dev/staging
+
+## Rollback
+```bash
+fly releases
+fly deploy --image registry.fly.io/my-app:PREVIOUS_VERSION
+```
+
+## Best For
+Dockerized apps, globally distributed apps, Elixir/Phoenix, managed Postgres