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summer-assets is a skill from the Summer skill library: a guide your AI agent reads when the task matches, so it builds the good version on the first try. Make game assets with Summer, no Summer Engine: find, generate and download 3D models, images, audio and video for any engine or app.

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When your agent uses it

  • Starting a session that has the Summer assets profile (generation tools, no engine tools)
  • The person wants assets for their own engine or web app, not a game built in Summer Engine
  • An asset skill ends with Summer Engine steps that this session cannot run

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Install

summer setup installs every skill for your agent. To add only this one:
Swap claude-code for your agent, such as codex or cursor. See Skills for every option.

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The skill

Use this skill when the session has the Summer assets profile: the generation and asset library tools are there, the Summer Engine tools are not (no summer_get_project_context, summer_add_node, summer_play or summer_screenshot). The person wants files for their own engine or web app. You deliver files, not scenes. A call written area.action({...}) is one operation: use the tool summer_area_action when your client lists it, else summer_call({ op: "area.action", input: {...} }). summer_search finds any operation and its exact input.

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What this session has

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The loop

  1. Ask what the asset is for, once, in one message: the engine or app, the file format, the size or scale, the style, how many.
  2. Reuse first. assets.search({ scope: "mine" }), then assets.search({ query, scope: "all" }). Generate only when nothing fits.
  3. Read the asset’s skill: sound effect sound-effect, music music-track, ambience ambient-bed, voice voice-line, image or style concept-art, UI ui-graphics, texture tileable-texture, sprites sprite-sheet or pixel-art, sky skybox-panorama, 3D prop prop-model, character character-model, creature or plant organic-model, vehicle vehicle-model, modular kit environment-kit, animation generate-motion, video trailer-shot. Follow it up to the point where the asset exists. Its Without Summer Engine section says where to stop: skip every step that imports the asset into a project or adds nodes to a scene.
  4. Confirm before you spend. Generation uses the person’s Summer credits. dryRun: true on the generate call returns the estimate (credits, balance, enough) and makes nothing. Say what you will make and how many versions, and wait for a yes.
  5. Generate, then wait. 3D, video and animation answer at once with { status: "running", job }: call jobs.wait until finished is true. Never continue on a running job.
  6. Use the returned id. assets.get with the asset id the finished job’s result holds. Do not search by name right after a generation.
  7. Check it. Look at the preview image or thumbnail you received. For audio, the person listens. Describe only what you actually received.
  8. Hand it over. Pass out with the folder the person named (or a file path): on the generate call, on jobs.wait for 3D, video and animation, or on assets.get for an asset you already have. The file is saved there and the answer gives localPath. Without out, a file made in a game project lands in its asset folder (Godot assets/, Unity Assets/Summer, Unreal Content/Summer, three.js public/assets). Tell the person the path and format. Connected only to Summer’s hosted server, there is no out: download downloadUrl from assets.get with your own shell.

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Formats

Each asset is a normal file in the person’s Summer library: GLB for 3D models, PNG, JPG or WebP for images, MP3 or WAV for audio, MP4 for video. GLB is Y up. Generated models are not at real-world size: give the person the target size (a door about 2 m, a person about 1.7 m). Tell them if their engine needs a conversion step, and let them choose the tool for it.

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Done means

  • The job finished without an error.
  • You saw the preview, or the person heard the sound.
  • The file is where the person asked, and you told them the path and format.

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Pitfalls

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From a shell

No Summer MCP tools in this session? Run each one as a command; when summer --version is missing or below 4.0, use npx -y summer-engine@latest in place of summer. Fields are flags in kebab-case (--scene-path res://main.tscn) or one --input '<json>', and summer ops describe <op> prints the exact input. The summer-cli skill has the rest.
  • asset-strategy: Route any ‘I need a [thing]’ asset request to the right skill: 2D, 3D, audio, video, VFX or animation.
  • sound-effect: Make sound effects (swings, hits, whooshes, reloads, UI): three versions to pick from, then wire them.
  • prop-model: Generate one static 3D prop (sword, barrel, chest, lantern, statue): one object, no rig, a MeshInstance3D.
  • concept-art: Explore art direction with 3-4 rough concept variants of a character, environment or prop.
Source: library/skills/summer-assets/SKILL.md, rendered from summer-engine@4.3.0 on npm.