Claude Bridge for s&box, NOW! With Codex

But the tools aren't the real story, the bridge ships a 🧠 brain. The plugins bundle sbox-cookbook: a code-grounded knowledge base mined from 51 real, shipped, open-source s&box games. The AI reaches for proven, shipped patterns, real inventories, economies, save systems, netcode, whole genre playbooks, instead of guessing.

🆕 NOW with Codex

The s&box Codex Bridge is a first-party distribution of the whole experience for OpenAI Codex: same 273 tools, same cookbook brain, same screenshot-verify workflow, generated from the Claude plugin by the same scripts, so the two can never drift.

codex plugin marketplace add LouSputthole/Sbox-Claude --ref codex-v2.2.0
codex plugin add sbox-codex-bridge@sboxskins

⚡ Start here: the one-command plugin

/plugin marketplace add LouSputthole/Sbox-Claude
/plugin install sbox-claude          (then restart Claude Code)

• 🧠 The brain: sbox-cookbook, the #1 reason to use this
• 🤖 A specialist game-dev agent: knows the workflow, the gotchas, when to reach for the cookbook
• 📸 The screenshot workflow skill: build → screenshot → verify → fix, so the AI is never building blind
• 🔌 Both MCP servers registered: the native editor endpoint + the optional lifeline, zero version drift
• 👋 Onboarding: first connect checks the bridge, detects your libraries, suggests a first move

🧠 The brain: build like a shipped game, not a guess

• 🎮 Genre playbooks: tycoon/idle, deathmatch, platformer, survival/horror, card-battler, gacha, social-hub, sandbox, vehicles, roleplay, more, each with the system stack, a build order, and how real games did it
• ⚙️ Game systems: inventory, economy, shops, saves, progression, loot tables, leaderboards, crafting, dialogue, round flow, waves, anti-cheat
• 🔩 Engine fundamentals: networking & authority, player controllers, Razor UI, physics & traces, lifecycle, world-gen, performance

It also carries the cross-cutting laws that bite every system: authority gating, host-authoritative money/health/score, request → apply → confirm RPCs, sanitize-and-clamp-on-load saves. The kind of thing you only learn by shipping.

💬 How it works

You: "Make a player controller with WASD, mouse look, double-jump, and a flashlight."
Claude: writes the script, wires the input, sets up the spotlight, then aims a camera, sees the PNG right in the tool result, and checks its own work.

You: "Build me an inventory with a hotbar."
Claude: opens the cookbook's inventory recipe, builds it host-authoritative like real games do, then runs networking_lint to confirm it actually replicates.

You: "Does my game actually work with two players?"
Claude: runs start_multiplayer_test: a REAL second game client boots, joins a private lobby, and plays in your session. (New in v2.2.0.)

🚀 What's new

• Rotation & vector args fixed everywhere: comma strings, arrays, and objects all parse on every creation, transform, camera, and placement path. The #1 paper cut of the native era is gone.
• Multiplayer test harness is LIVE: real sbox.exe clients in private hidden lobbies, truthful status tracking (dead clients report dead), full cleanup and rollback.
• NOW with Codex: first public s&box Codex Bridge (see top).

• 🎬 Gameplay recording: capture real play to .movie clips; record_playtest = a scripted test plus replayable footage of the run
• 🎥 Cutscenes without the dock: bake a shot list to a .movie in milliseconds; a true rolling-buffer killcam
• 🗣️ NPCs that speak: TTS dialogue with moving mouths driven by the live viseme stream, zero recorded VO
• 💥 Camera feel: shake / punch / tilt presets over the engine's new built-ins
• 💰 Economy & meta depth: audited ledgers, idle economies, tamper-evident saves, meta-progression, achievements, Elo, speedrun boards, map voting, utility-AI brains, water volumes, day-night sun

• Runs on s&box's own MCP server (port 7269, on by default), no Node.js on the main path
• 📸 Inline screenshots: the PNG arrives inside the tool result
• 🔎 Live tool discovery, permission-free reads (57 read-only tools), real error semantics
• ⏪ Scene checkpoints: the agent-side undo: snapshot, batch-edit, hate it, roll back
• 🚗 Vehicles toolset, real prefabs with GUID remap, dry-run batch ops

🛠️ What it can do (273 native tools · 28 toolsets)

• Scene & GameObjects: create, clone, transform, parent; hierarchy + selection; find by name/component/tag; one-call scene & project orientation
• Scene checkpoints ⏪, snapshot every root object, roll the whole scene back
• Batch ops: set/delete/add/reparent across many objects, each with dryRun: true preview
• Scripts: write / edit / hotload C#; one-shot scaffolds for controllers, NPC AI, managers, networked players
• Components: add/configure anything; typed properties; models, materials, prefab refs; call methods and editor buttons
• Multiplayer testing 🆕, boot real second clients into private lobbies; truthful status; plus the full networking codegen family (sync, RPCs, lobbies, host-migration)
• Vehicles 🚗, any rigidbody prop → raycast car with driver seat; arcade / drift / offroad / race presets; physgun-lite
• Physics: rigidbodies, colliders, joints, raycasts, overlap queries
• Lighting & atmosphere: lights, fog, post, skyboxes, probes, day-night sun, render-target cameras (CCTV/mirrors), one-call mood presets
• Characters: spawn, dress, pose Citizens; ragdolls; expressions; animgraph; LipSync, and full TTS dialogue with moving mouths
• Cinematics & recording 🎬, record gameplay to .movie and replay it; bake cutscenes from a shot list; killcams; camera shake presets; combat text, combo meters, nametags
• Terrain & world-gen: sculpt brushes, hills/trails/caves, forest painting, prop scatter, water volumes
• Navigation: bake navmesh, query paths
• UI & audio: Razor panels (screen + world), BuildHash auto-fixer; sound events + in-editor preview
• Inspection & validation 🔍, see what replicates, lint multiplayer footguns, validate scenes, scan broken references, lint C#/Razor before the compiler, diff saves. The AI verifies instead of hoping.
• Prefabs, real ones: full engine serialization, true re-instantiation with GUID remap
• Self-verify & diagnostics: inline screenshots (single, framed, or full orbit); camera bookmarks & visual baselines; console; restart_editor; the lifeline reads logs and compile errors even when the editor has crashed
• Debug & playtest: debug draw, slow-mo, perf counters; scripted in-frame playtests with pass/fail transcripts
• Docs & live API search: live reflection of the real loaded SDK + official docs search. A big reason the generated C# actually compiles.
• Publishing: validate, configure, thumbnails, package details

📦 Install

• A, Claude Code plugin (recommended): the one-command install at the top. Registers both servers + the brain + the agent + the workflow.
• B, Codex plugin: the two commands in the Codex section above.
• C, manual / any MCP client:

claude mcp add --transport http sbox http://127.0.0.1:7269/mcp

claude mcp add sbox-lifeline -- npx -y sbox-mcp-server@2 --lifeline

The native server dies with the editor; the lifeline answers "why did the editor crash" when nothing else can.

"Create a cube at 0, 0, 100." · "Make me a drivable car." · "Build me a host-authoritative currency system." (watch it reach for the cookbook) · "Test my game with a second player." (watch a real client boot and join)

🔒 Under the hood

• Loopback-only, 100% local: the server binds 127.0.0.1:7269; nothing leaves your machine
• 273 tools are [McpTool] methods the engine auto-discovers; hotload = live re-registration
• Play-mode-safe & path-safe: scene edits refused during play; file ops confined to your project
• Full picture: 286 total tools / 278 handlers: 273 native + 7 lifeline + 6 served by native built-ins

🧰 Full tool list

🩹 Troubleshooting

💡 Tips

• Use the plugin. The brain + agent + screenshot skill is most of the value, one command.
• checkpoint_scene before big batches: roll back if you hate it. Keep .scene files in Git.
• Ask for systems by name: "build me an inventory / a save system / an economy" routes to a proven recipe.
• Test multiplayer early: "boot a test client and check my sync" is one sentence now.

📜 License

🔗 Links

· Feedback: sboxskins@gmail.com

One addon, one command, zero ceremony. 273 native tools · 28 toolsets + a brain trained on real shipped games, for Claude, Codex, or any AI. Describe your game, the AI builds it. 🧀

💬 A note on the (early) reviews