Router Agent Skill

Master Router — Game-Development Skill Dispatcher

The entry point for game-development work. It fingerprints the project to pick one engine,

classifies the task from the request, names the minimal set of specialized skills, and tells

you to read them before acting. It dispatches and composes — it does not re-teach engine APIs.

When to use

• Use at the start of any game-development request — building or debugging a game, level,

player, enemy, shader, UI, save system, multiplayer, input, audio, AI, dialogue, or procedural

content — to decide which skill(s) to load.

• Use when the user names an engine or genre, says "make a game", or asks "which skill should I

use?".

When *not* to use: once the right skill is loaded and the task is squarely inside it, work

from that skill — don't re-run the router every turn. Re-route only when the task pivots to a

new engine or concern (router step 6).

Routing algorithm

• Detect engine — project fingerprint → at most one engine skill set (or "unknown"). §1.
• Classify task — phrasing → discipline(s) + at most one genre + workflow(s). §2.
• Resolve — the minimal set: engine skill(s) + discipline(s) + genre + workflow(s). §3.
• Read (disclosure) — open only the chosen SKILL.md bodies; references/ only on demand. §4.
• Compose — order: engine fundamentals → discipline concept → genre glue → workflow. §5.
• Fallback — engine unknown or no skill fits → ask or default to Godot; state any gap. §6.

1. Engine detection (project fingerprint)

Scan for the highest-confidence signal; choose exactly one engine. Stop at the first match.

| # | Engine | Primary signal | Skill set root |

|:-:|--------|----------------|----------------|

| 1 | Godot | project.godot | skills/godot/ |

| 2 | Unreal | *.uproject | skills/unreal/ |

| 3 | Unity | Assets/ and ProjectSettings/ProjectVersion.txt | skills/unity/ |

| 4 | Bevy | Cargo.toml with a bevy dependency | skills/other-engines/bevy-ecs/ |

| 5 | Phaser | package.json dep phaser | skills/web-engines/phaser-* |

| 6 | PixiJS | package.json dep pixi.js | skills/web-engines/pixijs-rendering/ |

| 7 | three.js | package.json dep three | skills/web-engines/threejs-* |

| 8 | LÖVE | conf.lua / main.lua calling love.* | skills/other-engines/love2d-core/ |

| 9 | pygame | *.py with import pygame | skills/other-engines/pygame-core/ |

| 10 | Roblox | *.rbxl(x) / *.project.json (Rojo) | skills/other-engines/roblox-* |

For secondary signals, the Godot-C#/Unity/Bevy and multi-web disambiguation rules, monorepos,

and plain-text engine mentions, read references/engine-detection.md.

2. Task classification (phrasing → category)

After the engine, read the request for task signals (three additive categories):

• disciplines (cross-engine concepts): game-ai, procedural-gen, dialogue-systems,

save-systems, audio-design, shader-programming, physics-tuning, level-design,

input-systems, game-feel, camera-systems, game-ui-ux, performance-optimization.

Triggered by concept words ("pathfinding", "save slots", "fragment shader", "screen shake",

"camera follow", "HUD/menu", "optimize/low FPS").

• genres (whole-game templates): platformer, roguelike, rpg, fps-shooter,

tower-defense, card-game, visual-novel, survival-crafting, puzzle. Triggered by genre

words ("make a roguelike", "deckbuilder").

• workflows (process/shipping): game-jam, prototype-fast, steam-publish,

itch-publish. Triggered by process words ("publish on Steam", "vertical slice").

File signals sharpen this: *.yarn/*.ink → dialogue-systems/visual-novel; steam_appid.txt

→ steam-publish; *.inputactions → unity-input-system.

3. Routing table (task → category → skill)

3a. Engine skills — read the one matching the detected engine + sub-task

• Godot (skills/godot/): language godot-gdscript / godot-csharp; structure

godot-nodes-scenes, godot-signals-groups; 2D godot-2d-movement, godot-tilemap; 3D

godot-3d-essentials; physics godot-physics; UI godot-ui-control; animation

godot-animation; shaders godot-shaders; data godot-resources; audio godot-audio;

netcode godot-multiplayer; ship godot-export.

• Unity (skills/unity/): scripting unity-csharp-scripting; input unity-input-system;

physics unity-physics; animation unity-animation; data unity-scriptableobjects; 2D

unity-tilemap-2d; AI nav unity-navmesh; ship unity-build-pipeline.

• Unreal (skills/unreal/): visual scripting unreal-blueprints; C++ gameplay

unreal-cpp-gameplay; input unreal-enhanced-input; AI unreal-behavior-trees; VFX

unreal-niagara; ship unreal-packaging.

• Web (skills/web-engines/): phaser-core, phaser-arcade-physics; pixijs-rendering;

threejs-scene-setup, threejs-gltf-loading, threejs-materials-lighting.

• Other (skills/other-engines/): bevy-ecs, pygame-core, love2d-core, roblox-luau,

roblox-datastores.

3b. Disciplines — load with the engine skill (concept ↔ engine API)

| Concept (says:) | Discipline skill | Pairs with (engine API) |

|-------------------|------------------|-------------------------|

| enemy AI, behavior tree, pathfinding, steering | game-ai | unity-navmesh / unreal-behavior-trees / Godot nav |

| procedural, noise, seed, dungeon generator | procedural-gen | engine tilemap/grid skill |

| dialogue, Yarn, Ink, conversation tree | dialogue-systems | engine UI skill |

| save/load, slots, persistence | save-systems | roblox-datastores / engine IO |

| adaptive music, mixer, ducking, SFX | audio-design | godot-audio / Unity AudioMixer |

| shader, fragment, dissolve/outline | shader-programming | godot-shaders / engine material |

| jitter, tunneling, fixed timestep | physics-tuning | godot-physics / unity-physics |

| whitebox, blockout, tile layout, pacing | level-design | godot-tilemap / unity-tilemap-2d |

| rebind, gamepad, input buffering | input-systems | unity-input-system / unreal-enhanced-input / Godot InputMap |

| screen shake, hit-stop, juice, squash & stretch, "make it punchy" | game-feel | engine animation/tween + camera-systems (shake) |

| camera follow, deadzone, look-ahead, orbit, first-person | camera-systems | godot-2d-movement / godot-3d-essentials / Cinemachine |

| HUD, menu, UI layout, scaling, safe area, focus nav | game-ui-ux | godot-ui-control / Unity UI (UGUI/UI Toolkit) |

| low FPS, optimize, draw calls, GC spike, pooling, profiler | performance-optimization | engine profiler + physics-tuning |

3c. Genres — compose engine + disciplines (bind * to the detected engine)

| Genre (says:) | composes |

|-----------------|----------|

| platformer, jump, double jump | godot-2d-movement (or engine physics) + godot-tilemap/unity-tilemap-2d + level-design + camera-systems + game-feel |

| roguelike, procedural dungeon, permadeath | procedural-gen + godot-tilemap/unity-tilemap-2d + game-ai + save-systems + game-feel |

| RPG, stats, inventory, quests | godot-resources/unity-scriptableobjects + dialogue-systems + save-systems + game-ui-ux |

| FPS, first-person, hitscan | godot-3d-essentials/unreal-cpp-gameplay + input-systems + game-ai + camera-systems + game-feel |

| tower defense, waves, lanes | game-ai + engine movement + level-design + game-ui-ux |

| card game, deckbuilder, TCG | godot-resources/unity-scriptableobjects + game-ui-ux (+ engine UI) |

| visual novel, branching story | dialogue-systems + save-systems + game-ui-ux |

| survival, crafting, gathering | save-systems + godot-resources/unity-scriptableobjects + procedural-gen + game-ui-ux |

| puzzle, match-3, grid logic | godot-tilemap/unity-tilemap-2d + level-design + game-feel |

3d. Workflows — engine-independent process & shipping

game-jam (jam, 48-hour, Ludum Dare/GMTK) · prototype-fast (vertical slice, MVP, greybox) ·

steam-publish (Steam, Steamworks, depot; steam_appid.txt) · itch-publish (itch.io, butler;

.itch.toml).

For the exhaustive per-skill trigger list and every engine binding, read

references/routing-table.md.

4. Read protocol (progressive disclosure)

• Preloaded: only each skill's name + description are in context. Decide from those plus

the fingerprint — do not pre-read bodies.

• On selection: read the body of each chosen skills/<category>/<name>/SKILL.md — and

only those. Never bulk-load a whole category.

• On demand: read a skill's bundled references/ files only when the subtask needs that

depth (the skill body says when).

• Re-route on pivot: if the task changes (movement → saving), select and read the newly

relevant skill instead of keeping everything loaded.

Announce what you load and why, e.g.: *"Detected Godot (project.godot). Loading

godot-2d-movement for the controller and platformer for jump feel; will open the platformer

skill's feel-tuning.md reference if you want coyote-time/buffering."*

5. Composition rules

• One engine set, additive concepts. Exactly one engine skill set; add the disciplines the

task needs and usually at most one genre. Workflows attach independently.

• Order: engine fundamentals → discipline concept → genre orchestration → workflow.
• Ownership on overlap: the engine skill owns API/syntax; the discipline skill owns

the portable concept/algorithm and defers to the engine skill for code; the genre skill owns

structure/glue and links out instead of re-teaching a primitive.

• Hand-offs: when a genre's composes names a slot like *-2d-movement, bind it to the

detected engine. If that engine lacks the exact skill, see §6 and references/routing-table.md

("Binding gaps").

6. Unknown-engine & no-skill fallback

Engine unknown (no fingerprint, no engine named):

• Check the request for a plain-text engine name ("in Unity", "using Phaser"). If found, adopt it.
• If the task is a pure concept/genre/workflow question, route straight to the engine-agnostic

discipline/genre/workflow skill — no engine needed ("what's a good save format?" → save-systems).

• Only if engine choice actually blocks the answer, ask one targeted question ("Which engine —

Godot, Unity, Unreal, or a web/other engine?"). If the user has no preference and one is needed,

default to Godot (the most fully covered engine here) and say so.

• Never invent an engine or load an engine skill on a guess.

Engine known but no skill covers the subtask: load the closest engine skill plus the relevant

discipline and state the gap plainly (e.g. "no dedicated Unity 2D-movement skill; using

unity-csharp-scripting + unity-physics"). Never fabricate a skill name.

Conflicting/multiple genres: pick the dominant genre from the phrasing; mention the secondary

and offer to load it if the user confirms.

Worked examples

| Request | Detected engine | Skills loaded (in order) |

|---------|-----------------|--------------------------|

| "add a double jump to my Godot player" | Godot (project.godot) | godot-2d-movement → platformer |

| "make an inventory for my Unity RPG" | Unity (Assets/+ProjectSettings/) | unity-scriptableobjects → rpg → save-systems |

| "procedural dungeon roguelike in Godot" | Godot | godot-tilemap → procedural-gen → roguelike |

| "branching dialogue from a .yarn file" | (none required) | dialogue-systems (+ engine UI skill if an engine is detected) |

| "how do I design save slots with migration?" | (none) | save-systems only |

| "publish my game on itch with butler" | (any/none) | itch-publish only |

| "I want to make a game but don't know what to use" | unknown → ask, default Godot | router asks once; then e.g. godot-nodes-scenes |

| "make hits feel punchy in my Godot game" | Godot (project.godot) | game-feel (+ camera-systems for shake) |

| "the camera should follow my player smoothly" | (detected engine) | camera-systems (+ engine movement skill) |

| "my Unity game drops to 30 FPS, optimize it" | Unity (Assets/+ProjectSettings/) | performance-optimization (profile first) → engine skill |

References

• Full engine fingerprints, secondary signals, and disambiguation: references/engine-detection.md.
• Exhaustive per-skill trigger words, engine bindings, and binding gaps: references/routing-table.md.