diff --git a/Sources/forge-cli/Main.swift b/Sources/forge-cli/Main.swift
index ecf35ad..4a67e04 100644
--- a/Sources/forge-cli/Main.swift
+++ b/Sources/forge-cli/Main.swift
@@ -1 +1,115 @@
-@main struct ForgeCLI { static func main() { print("forge") } }
+import ArgumentParser
+import Foundation
+import ForgeCamera
+import ForgeCameraARRI
+import ForgeGrade
+import ForgeColor
+import ForgeSim
+
+@main
+struct Forge: AsyncParsableCommand {
+    static let configuration = CommandConfiguration(
+        commandName: "forge",
+        abstract: "On-set live grading: push looks to cameras over IP.",
+        subcommands: [Push.self, Status.self, Sim.self])
+}
+
+struct CameraOptions: ParsableArguments {
+    @Option(name: .long, help: "Camera IP/host")
+    var host: String
+
+    @Option(name: .long, help: "Camera port")
+    var port: Int
+
+    @Option(name: .long, help: "Driver: arri")
+    var driver: String = "arri"
+
+    func makeDriver() throws -> any CameraDriver {
+        switch driver {
+        case "arri":
+            return ArriDriver(host: host, port: port)
+        default:
+            throw ValidationError("unknown driver '\(driver)' (supported: arri)")
+        }
+    }
+}
+
+struct Push: AsyncParsableCommand {
+    static let configuration = CommandConfiguration(abstract: "Flatten a grade stack and push to camera.")
+
+    @OptionGroup var camera: CameraOptions
+
+    @Option(name: .long, help: "Grade snapshot JSON file")
+    var look: String
+
+    @Option(name: .long, help: "LUT lattice size")
+    var lattice: Int = 33
+
+    @Flag(name: .long, help: "Keep leading CDL native (camera trim), bake remainder")
+    var splitCdl = false
+
+    func run() async throws {
+        let data = try Data(contentsOf: URL(fileURLWithPath: look))
+        let stack = try GradeSnapshot.decode(data)
+        let driver = try camera.makeDriver()
+
+        let flattened = Flattener.flatten(
+            stack: stack,
+            latticeSize: lattice,
+            splitLeadingCDL: splitCdl && driver.capabilities.supportsNativeCDL)
+
+        try await driver.connect()
+        try await driver.push(look: flattened)
+        await driver.disconnect()
+        print("pushed: lattice=\(lattice) cdl=\(flattened.cdl != nil ? "native" : "baked") -> \(camera.host):\(camera.port)")
+    }
+}
+
+struct Status: AsyncParsableCommand {
+    static let configuration = CommandConfiguration(abstract: "Print camera connection/rec state and metadata.")
+
+    @OptionGroup var camera: CameraOptions
+
+    func run() async throws {
+        let driver = try camera.makeDriver()
+        var iterator = driver.state.makeAsyncIterator()
+        try await driver.connect()
+
+        // First polled state carries metadata.
+        var reported = false
+        for _ in 0..<10 {
+            guard let s = await iterator.next() else { break }
+            if let md = s.metadata {
+                print("connection: \(s.connection.rawValue)")
+                print("recording: \(s.isRecording)")
+                print("clip: \(s.clipName ?? "-")")
+                print("ei: \(md.exposureIndex.map(String.init) ?? "-")  wb: \(md.whiteBalance.map(String.init) ?? "-")  tint: \(md.tint.map(String.init) ?? "-")")
+                print("fps: \(md.fps.map { String($0) } ?? "-")  tc: \(md.timecode ?? "-")")
+                reported = true
+                break
+            }
+        }
+        if !reported {
+            print("connection: connected (no metadata yet)")
+        }
+        await driver.disconnect()
+    }
+}
+
+struct Sim: AsyncParsableCommand {
+    static let configuration = CommandConfiguration(abstract: "Run an ARRI-style camera simulator.")
+
+    @Option(name: .long, help: "Listen port")
+    var port: Int = 8035
+
+    func run() async throws {
+        let sim = ArriSimulator()
+        try await sim.start(port: port)
+        let bound = await sim.boundPort ?? port
+        print("arri sim listening on 127.0.0.1:\(bound)")
+        // Run until killed.
+        while true {
+            try await Task.sleep(for: .seconds(3600))
+        }
+    }
+}