Effect 4.0, the TypeScript library for building AI agents and asynchronous programs, has been declared stable, with the project publishing release notes and a v3-to-v4 migration guide. The final relea…
Effect, the TypeScript library for building AI-era applications, shipped a runtime performance pass in issue 137 of its "This Week in Effect" newsletter, eliminating wasted work across Schema compilat…
Effect's Module of the Week post details RcMap, a data structure in the Effect TypeScript library that combines a keyed map with reference counting to share and automatically clean up resources such a…
Effect, the TypeScript library for building synchronous and asynchronous programs, published its weekly community update, This Week in Effect - 136, detailing continued release-candidate hardening plu…
Effect's PersistedQueue module was named Module of the Week for its ability to persist background jobs across API and worker restarts, using a lock acquired via `take` that other workers cannot claim …
Effect-TS, a TypeScript library built around typed errors and declarative effect handling, is being positioned as a strong fit for AI agent development, according to a first-person argument that cites…
Effect shipped a breaking API rename in its v4 release candidate, changing `Schema.transformOrFail` to `Schema.transformEffect`, as part of a week of release-candidate hardening that also declared `Re…
Kit Langton of Anomaly used AI agents to submit 207 pull requests to the Effect TypeScript library on September 2, after being told not to send 100 a day, maxing out GitHub runner quotas. The flood, e…
Effect, the TypeScript library for the AI era, released its weekly update detailing a hardening effort with approximately 130 commits focused on correctness fixes across modules, plus performance opti…
Effect v4 reached its Release Candidate on August 12, 2026, with the core package now having zero external dependencies, according to the Effect team's August update. The update highlights a native Po…
Effect, the TypeScript library for the AI era, released updates to its v4 Release Candidate, achieving zero external dependencies in the core package and introducing a native PostgreSQL protocol clien…
Effect, the TypeScript library for the AI era, released version 4 release candidate updates this week, adding new APIs such as Match.fn selector matchers and RPC HTTP stream backpressure, improving tr…
Effect v4 has officially moved to Release Candidate status, marking the final stretch before stable release, with the API surface presumed stable and focus shifted to correctness, reliability, and doc…
Effect, the TypeScript library for the AI era, released its weekly update highlighting v4 beta improvements including Schema refinements, MCP conformance fixes, SQL D1 batch support, and HTTP tracing …
Effect v4 beta's July 2026 updates moved development to the canonical Effect-TS/effect repository, added native Deno support, a new Graph module, and overhauled Schedule and Cron APIs. The beta also i…
Effect, the TypeScript library for the AI era, released a landmark week of updates for its v4 beta, including full native Deno support, security hardening, fiber runtime fixes, and the public launch o…
The Effect team recommends vendoring the Effect source code into a project using git subtrees to improve coding agent performance, as agents learn more effectively from real library code than from doc…
Effect v4 Beta entered its first full week on the canonical Effect-TS/effect repository, with a thorough Cron hardening pass, fiber runtime fixes, new core APIs, and continued AI and HTTP improvements…
Effect v4 Beta has moved to the canonical Effect-TS/effect repository, with the main branch now officially Effect v4 while v3 lives on the v3 branch. The effect-smol repository has been archived and i…
Effect v4 Beta entered July with correctness fixes, URL API refinements, and AI documentation expansion, including Schema and Predicate introductions. The update also fixed HttpApi security middleware…