Updated today
by SummerEngine
summer
The game engine for AI agents. Give your AI superpowers for game dev + A skills framework that just works + easy install and setup ☀️
76 GitHub stars (76)
+8 in 15 days
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- 30 skills (30 skills found in its SKILL.md files)
- 6 forks (6 forks)
- Today last update (Last updated today)
Install
Skills CLI
npx skills add SummerEngine/summer
Asks which skills and agents to install. Just one: npx skills add SummerEngine/summer --skill 3d-lighting — add -g for every project.
Claude Code
git clone https://github.com/SummerEngine/summercp -r "summer/library/skills/3d-lighting" ~/.claude/skills/
Copies the 3d-lighting skill into ~/.claude/skills/ for every project (use .claude/skills/ for one project). Repeat for the other skills listed below.
Plugin
/plugin marketplace add SummerEngine/summer
Run inside Claude Code if the repository ships a plugin marketplace, then pick plugins from /plugin.
Skills can run code on your machine — read the SKILL.md first.
What it does
In the author's own words, from each skill's SKILL.md — showing the first 30 of 112 files.
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3d-lighting
Set up 3D scene lighting — DirectionalLight3D vs Omni vs Spot, WorldEnvironment, sky, shadow tuning, ambient — per current Summer conventions.
library/skills/3d-lighting/SKILL.md on GitHub (opens in a new tab) -
adaptive-music
Wire music stems to game state — combat/explore/boss/tension crossfades on a shared bus, paired with a state machine and AudioBus structure.
library/skills/adaptive-music/SKILL.md on GitHub (opens in a new tab) -
agent-playtesting
Playtest by driving the LIVE game — deterministic launch, frame-stamped probes before/after each action, exact frame steps, scripted or recorded input.
library/skills/agent-playtesting/SKILL.md on GitHub (opens in a new tab) -
ambient-bed
Generate a long looping location ambience — forest, dungeon, city, spaceship, cave — a looping AudioStreamPlayer on the Ambient bus with a seamless loop.
library/skills/ambient-bed/SKILL.md on GitHub (opens in a new tab) -
animated-loop
Generate a short seamlessly-looping video clip — splash background, animated logo backdrop, idle title-screen footage — wired as a looping VideoStreamPlayer.
library/skills/animated-loop/SKILL.md on GitHub (opens in a new tab) -
animation-tree
Design and wire AnimationTree state machines and blend trees so clips respond to gameplay — locomotion blends, attack interrupts, hit reactions.
library/skills/animation-tree/SKILL.md on GitHub (opens in a new tab) -
art-direction
Define the game's visual style — references, palette, mood, lighting plan, post-processing, do/don't list — output as an art bible at .summer/art-bible.md.
library/skills/art-direction/SKILL.md on GitHub (opens in a new tab) -
asset-strategy
Route any 'I need a [thing]' asset request to the right specialist skill — disambiguates 2D / 3D / audio / video / VFX / animation pipelines.
library/skills/asset-strategy/SKILL.md on GitHub (opens in a new tab) -
audio-direction
Define the game's sonic identity — music style, instruments, SFX vocabulary, dynamic music plan — output as an audio bible at .summer/audio-bible.md.
library/skills/audio-direction/SKILL.md on GitHub (opens in a new tab) -
auto-fire-targeting
Design or fix auto-fire weapon targeting (survivors, top-down ARPG, tower defense) — the pending-damage pattern that prevents over-commit and overkill.
library/skills/auto-fire-targeting/SKILL.md on GitHub (opens in a new tab) -
brainstorm-game
Turn a vague idea into a buildable plan — genre, scope, core loop, mechanics, art direction — written as a 1-page brief to .summer/GameSoul.md.
library/skills/brainstorm-game/SKILL.md on GitHub (opens in a new tab) -
brainstorming
Explore user intent, requirements, and design before implementation — must run before any creative work: features, components, mechanics, behavior.
library/skills/brainstorming/SKILL.md on GitHub (opens in a new tab) -
browse-templates
List available Summer Engine project templates, present the choices, and create a project from the chosen one via summer create.
library/skills/browse-templates/SKILL.md on GitHub (opens in a new tab) -
celeste-momentum-platforming
Celeste-style 2D precision platformer movement — momentum running, coyote time, variable jumps, dash, wall jump/slide, climb stamina, pixel corner correction.
library/skills/celeste-momentum-platforming/SKILL.md on GitHub (opens in a new tab) -
character-animation-wiring
Wire a rigged, animated character end to end — inspect real clips and bones, locomotion state machine, method-track events, poses, blend shapes, root motion.
library/skills/character-animation-wiring/SKILL.md on GitHub (opens in a new tab) -
character-model
Generate a rigged humanoid — player, NPC, enemy, boss — via T-pose reference, user-gated preview, and Meshy auto-rig, wired as CharacterBody3D or Node3D.
library/skills/character-model/SKILL.md on GitHub (opens in a new tab) -
character-portrait
Generate a single polished character bust for dialogue UI, character select, lore cards, or codex entries. One character, locked composition, VN-style.
library/skills/character-portrait/SKILL.md on GitHub (opens in a new tab) -
cinematic-cutscene
Generate a non-interactive cutscene — reference-locked look, a 5-10s image-to-video shot, optional TTS dialogue — wired as a fading VideoStreamPlayer.
library/skills/cinematic-cutscene/SKILL.md on GitHub (opens in a new tab) -
concept-art
Explore art direction with 3-4 rough concept variants of a character, environment, or prop to pick a vibe before committing to a final asset.
library/skills/concept-art/SKILL.md on GitHub (opens in a new tab) -
create-asset-sheet
Generate a pack of 2D game assets from one prompt — tile sheet, UI kit, character pack, or biome set — sliced, classified, and saved as one pack ArtAsset.
library/skills/create-asset-sheet/SKILL.md on GitHub (opens in a new tab) -
debug
Disciplined bug/crash/error loop for Summer projects — script errors, console, debugger, hypothesis, fix, verify — before making code or scene changes.
library/skills/debug/SKILL.md on GitHub (opens in a new tab) -
debugging-game-feel
Debug features that work but feel wrong — floaty jumps, mushy combat, sluggish camera — subjective bugs living in tuning, timing, and feedback layers.
library/skills/debugging-game-feel/SKILL.md on GitHub (opens in a new tab) -
design-level
Design a single level — layout, pacing, encounters, secrets, reward gating — outputs a level design doc and a node-tree skeleton for summer_create_scene.
library/skills/design-level/SKILL.md on GitHub (opens in a new tab) -
design-mechanic
Design one game mechanic in detail — input, response, feedback, failure modes, depth, tunables — outputs a design doc, node-graph sketch, GDScript stub.
library/skills/design-mechanic/SKILL.md on GitHub (opens in a new tab) -
design-npc
Design enemy/NPC/boss/companion behavior — perception, personality, intent, action state machine, telegraphs — outputs a GDScript stub plus node tree.
library/skills/design-npc/SKILL.md on GitHub (opens in a new tab) -
diagnosing-perf-regressions
Find why frame rate, frame time, or load time got worse since a known-good state — regression hunting, not general performance tuning.
library/skills/diagnosing-perf-regressions/SKILL.md on GitHub (opens in a new tab) -
dispatching-parallel-agents
Work 2+ independent tasks in parallel when they share no state and have no sequential dependencies.
library/skills/dispatching-parallel-agents/SKILL.md on GitHub (opens in a new tab) -
driving-the-editor-ui
Drive the editor UI by name: invoke actions, clear blocking dialogs, switch the main screen, read a dock — and route scene work to the scene tools instead.
library/skills/driving-the-editor-ui/SKILL.md on GitHub (opens in a new tab) -
environment-kit
Generate a modular environment kit — wall pieces, floor tiles, pillars, doors, arches, corners — snap-together meshes sharing one visual style.
library/skills/environment-kit/SKILL.md on GitHub (opens in a new tab) -
export-and-ship
Assess and prepare a game export: inventory installed templates and targets, validate release assets and config, produce supported builds after approval.
library/skills/export-and-ship/SKILL.md on GitHub (opens in a new tab)
No skill matches that filter.
Review before you install
A skill is a set of instructions and scripts your agent will follow, and it can run code on your machine. Read the SKILL.md and any scripts first — this listing is not a security review.