JavaScript promises are made to be broken. Speculations are cancellable promises.

Eleventy plugin to add speculation rules to your build process

SSR page middleware for @youneed/ssr: inject the Speculation Rules API <script> (prefetch/prerender) from a page's declared rules.

A webpack plugin to add speculation rules to the bundling process.

> [σκέψις](https://www.perseus.tufts.edu/hopper/text?doc=Perseus:text:1999.04.0057:entry=ske/yis): viewing, perception by the senses. Examination, speculation, consideration.

Pi extension that enforces read-before-edit, post-edit review reminders, and speculation verification on every assistant turn. Runtime-agnostic — runs under upstream pi (@earendil-works/pi-coding-agent) and OMP (@oh-my-pi/pi-coding-agent).

Speculation API component for react.

## Go to [https://github.com/uNetworking/uWebSockets.js](https://github.com/uNetworking/uWebSockets.js).

The Speculation Rules API is designed to improve performance for future navigations. It targets document URLs rather than specific resource files, and so makes sense for multi-page applications (MPAs) rather than single-page applications (SPAs).

Execution layer that hides LLM tail latency with hedging, speculation, prefetch, and cancellation.

Make your site's pages instant in 1 minute — modernized fork of instant.page with TypeScript, Speculation Rules API, and PointerEvent

OZC — Trust infrastructure for agent-generated information. On-chain (Base) shared ledger; no authority, no speculation.

Pendle MCP — fixed yield, YT speculation, PT loop, Boros funding for AI agents (Claude / Cursor)

Faster subsequent page-loads by prefetching in-viewport links during idle time

A game of speculation using bitcoin and the lightning network

Adaptive prefetching — learns which pages to prefetch using Bayesian Thompson Sampling + Speculation Rules API

AI-native bash interpreter in TypeScript — a sandboxed, in-process POSIX shell engine for AI agents, with 110+ builtins, WASM Python/JS/SQLite runtimes, fork-speculation, an MCP server, and an agent terminal bridge.

June — the agent-native React framework. Contract layer (pure, host-free).

Angular library for the Speculation Rules API - Enable prefetching and prerendering for faster page navigations

Intent-aware prefetching. Predicts where the cursor is headed — proximity + trajectory — and prefetches (or prerenders via the Speculation Rules API) the link a beat before the click. Zero-config, ~4KB, framework-agnostic.