TypeScript SDK for building Smooth Extension Protocol (SEP) extensions: `defineExtension`, `defineTool`, a stdio JSON-RPC transport, an in-process test host, and a conformance runner. Extensions are subprocesses speaking JSON-RPC 2.0 ndjson to any SEP hos

Public SDK contract for 360crewing marketplace extensions: defineExtension, hooks, slot types.

The conciv extension authoring contract: defineExtension/defineTool plus the SolidJS runtime context and typed useSlot/useContext hooks.

TypeScript SDK for building Excalibur programmatic extensions: defineExtension, ExtensionContext and the contribution interfaces

Type declarations and defineExtension for Backfill extensions

Agent-native, GitHub-shaped forge — typed authoring package for per-repo extensions (defineExtension + Zod).

This package contains Headless helpers and functionality for Lexical.

The platform composition surface. Ships the extension seam (`defineExtension`) that extension packs import, plus concrete deployer-injected backends such as the fs-backed `BlobStore` (tenant-bound by construction and path-jailed; the neutral `BlobStore` i

Core utilities for formspec

Author-facing SDK for OXP extensions. Stable surface for `host` API, defineExtension(), and typed manifests. Works in VS Code webviews, Piye Workers, and `oxp dev`.

Build-time compiler for Lexical: tree-shaking annotations and inlining for the side-effect-free factories

Public frontend SDK for GEA extensions.

TypeScript authoring SDK for building runtime extensions for theway, a terminal-first local AI agent runtime.

The frozen extension surface of @vyuhlabs/dxkit: the declarative descriptor language (HTTP-flow and model-schema construct families), grammar-shape access types, the versioned extension wire schemas (contract.v1, inventory.v1, findings.v1, export.v1), and

Jupyter UI for Lexical

Oh My Tool extension SDK

Budgeted JavaScript interpreter with explicit host capabilities and resumable execution

Write extensions for the Ham2K Logger: typed hook contracts and the host API

Core utilities for formspec

Build MV3 browser extensions (Chrome, Firefox, Safari) the Stacks way — manifest, content/background scripts, DNR rules, packaging, Safari container app, all config-driven.