What is spline-generate?

A code generator for adding a Spline scene, a 3D design made in Spline, to a React, Next.js, or plain JavaScript project. It creates the integration code from a Spline scene URL or ID.

Generating JavaScript or TypeScript components, variable bindings, event handlers, WebSocket connections, and optional lazy loading for Spline scenes.

It removes the need to manually connect the scene, its variables, events, and live connection to your application.

spline-generate — Command for Claude Code by lesleslie

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo

git clone --depth 1 https://github.com/lesleslie/spline-mcp

Made for: Claude Code.

Or install spline, the plugin that ships this one along with the rest of its 3 commands.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/commands/lesleslie/spline-mcp/spline-generate/github.svg)](https://agentmods.dev/commands/lesleslie/spline-mcp/spline-generate)

Your own site

<a href="https://agentmods.dev/commands/lesleslie/spline-mcp/spline-generate"><img src="https://agentmods.dev/badge/commands/lesleslie/spline-mcp/spline-generate/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/commands/lesleslie/spline-mcp/spline-generate"><img src="https://agentmods.dev/badge/commands/lesleslie/spline-mcp/spline-generate.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 24 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 612 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00024	$0.00612
Opus 5	$0.00012	$0.00306
Sonnet 5	$0.00005	$0.00122
Haiku 4.5	$0.00002	$0.00061

Measured 8d ago against content hash 4b642d1ce01b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

spline-generate scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

commands/spline-generate.md · 35 lines

What it actually says

/spline-generate

Generate a complete Spline 3D scene integration (component code + variable bindings + event handlers + WebSocket hookup) from a Spline scene URL or scene ID.

Usage

/spline-generate <scene-url-or-id> [--framework react|nextjs|vanilla] [--typescript] [--lazy-load] [--no-semicolons]

Arguments:

<scene-url-or-id>: full Spline export URL (https://prod.spline.design/<id>/scene.splinecode) or a bare scene ID. The scene must have been previously downloaded by mcp__spline__download_scene and live in the cache.
--framework react|nextjs|vanilla: optional target framework. Defaults to react.
--typescript: optional flag. Emit TypeScript instead of plain JavaScript. Defaults to on for React/Next.js.
--lazy-load: optional flag. Wrap the scene in React.lazy + <Suspense>. Defaults to on for React/Next.js.
--no-semicolons: optional flag. Emit code without trailing semicolons.

Workflow

Call mcp__spline__parse_scene_url on the input to extract the canonical scene ID (or accept it as-is if a bare ID was supplied).
Call mcp__spline__build_export_url to derive the export URL the server will use to fetch the cached scene.
Call mcp__spline__validate_scene on the resolved URL to confirm the .splinecode payload is well-formed before generation.
Call mcp__spline__generate_full_integration with the resolved URL and the chosen framework/options. This returns the full component, variable bindings, event handlers, and WebSocket hookup in one response.
If the user only wants a single snippet (e.g. just the runtime initialization block), call mcp__spline__generate_snippet instead of generate_full_integration.
Report the generated code and any next-step hints (e.g. which package to install, how to wire the WebSocket channel).

Example

/spline-generate https://prod.spline.design/6Wq1Q7YGyM-iab9i/scene.splinecode --framework react

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

8d ago First seen · 35 lines · 24 tokens per session scan A 4b642d1ce01b

Subscribe to this mod's changes

spline-generate is a command published in the GitHub repository lesleslie/spline-mcp (4 stars, last pushed 7d ago), licensed BSD-3-Clause. It adds 24 tokens to every session and 612 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Design and UX Frontend

seed-create-component

A command for creating a new SEED Design component, including its source specification, recipes, React implementation, documentation, examples, and optional headless layer.

daangn/seed-design · 12 tokens

sddesign

Full spec-driven pipeline — walks brief → tokens → shape (spec) → craft (build) → converge → ship in one guided run. Writes .ui-craft/spec.md. Run when starting a net-new surface from scratch.

educlopez/ui-craft · 46 tokens

craft

One-shot build pipeline for a complete surface from an outcome recipe — inputs (or defaults) → composition → theme → build order → acceptance bar. Use when the user asks for a whole surface ("build me a dashboard", "I need a landing page") and expects a shippable result, not component-level help.

educlopez/ui-craft · 64 tokens

spline-generate