Provider-agnostic building blocks for LLM apps. Keyless — point them at any endpoint.
Zero-dependency, provider-agnostic LLM chat client.
Typed prompt engineering — build, compose and version prompts.
Token estimator and cost calculator.
Extract and repair JSON from messy model output.
Isomorphic Server-Sent Events parser for token streams.
Define function-calling tools once, use them anywhere.
Retrieval, memory and evaluation — composable, and none of it phones home.
The glue for a retrieval-augmented pipeline.
Keyless embeddings client with provider presets.
In-memory vector store for search and RAG.
Tool-calling / ReAct agent loop.
Conversation memory for assistants.
Evaluate model output against your own checks.
Runner-agnostic primitives — drop them into Jest, Vitest, Node's test runner or your own.
Fluent assertions with readable failures.
Spies, stubs and mocks.
Deterministic typed test-data factories.
Stable snapshot testing.
Immutable date maths built on Intl — no 300 KB dependency tree.
Arithmetic, start/end of unit, formatting.
ISO-8601 durations as a real type.
IANA timezone toolkit via Intl.
Time ranges, iteration and business-day maths.
The pieces every product needs, without a vendor account behind each one.
Browser push notifications, VAPID included.
Turn any site into an installable PWA.
In-app toasts, framework-agnostic.
Keyless proof-of-work CAPTCHA.
GDPR-friendly cookie consent.
Dynamic Open Graph share cards.
Run them with npx — nothing to sign up for.
Scaffold a production-ready Next.js app.
Free local-business lead finder, no API key.
Structured data from any site.
Local-first RAG over a folder of documents.
Convert JSON/CSV to .xlsx and back.
Watch a page or selector and get alerted.
Everything below is public. Open it, clone it, install it — no account required.
Developer Platform
Package docs, guides, licences and the create-app generator — the reference for everything we publish.
developer.lacspace.com
Templates Hub
Production-ready starters you can clone, wired to the same packages our own products run on.
templates.lacspace.com
npm — @lacspace
Zero-dependency, isomorphic libraries. No API keys, no telemetry, dual ESM + CJS builds.
130+ packages published
GitHub — npm-packages
The monorepo behind the scope: source, tests and changelogs for every library we ship.
github.com/lacspace
Lacspace Wiki
The knowledge hub — company, vision, products and engineering practice, in the open.
Public repository
Main site
Products, case studies, guides and the company itself — including how to book a live demo.
lacspace.com
Frequently asked questions
Quick answers about this page in Lacspace One.
Are Lacspace packages open to use?
Yes — official @lacspace packages and libraries are published for developers to install and build with.
How do I install a package?
Each package page lists its install command and usage so you can add it to your project in seconds.