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Agents tracked: 479 Releases (7d): 721 Agent status: all upSince last limit reset: Claude 39d · Codex 1d Updated Nov 1, 2026
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AI changelog: what's new each month

Every stable AI release summarised by month: the highlights, new features, improvements, fixes and anything you need to act on. 1 month covered; the current month updates daily.

October 2026

80 releases: 1.0.0 → 1.0.1

October brought the stable 1.0.0 release with significant API cleanup, plus new capabilities for building durable agent harnesses and integrating with Neon's AI Gateway.

Action needed
  • All deprecated exports, options, fields, and type aliases from 0.x have been removed; use replacements that shipped in 0.x.
  • addToolApprovalResponse() removed from ChatClient and chat hooks; use resolveInterrupt() instead.
  • Old wire formats removed: CUSTOM approval-requested and tool-input-available events, [DONE] SSE line, forwardedProps data copy, and pre-binding interrupt descriptors.
  • toolName alias removed from TOOLCALLSTART chunks; use toolCallName instead.

Highlights

  • TanStack AI reached 1.0.0, removing all deprecated APIs from the 0.x series.
  • New @tanstack/ai-harness package for building multi-turn agent conversations with session management.
  • New @tanstack/ai-harness-cli for running harnesses from the terminal with multiple interaction modes.
  • New @tanstack/ai-neon integration for Neon AI Gateway with automatic model routing.
  • ThreadId is now required across all chat and generation APIs for better session tracking.

New

  • @tanstack/ai-harness package with defineHarness() for agent configuration and createHarnessHost() for session management.
  • Session-based API with methods for sending prompts, steering turns, resolving interrupts, and managing message history.
  • Host observation API to read threads without active sessions, accessing events, transcripts, snapshots, and usage data.
  • @tanstack/ai-harness-cli with line mode, prompt mode, and HTTP serve mode for different use cases.
  • @tanstack/ai-neon for Neon AI Gateway integration with automatic routing based on model type.
  • CredentialStore support in createHarnessHost for durable user credential management.
  • Session lifecycle configuration with idle timeout and maximum open session limits.
  • Media handling in sessions with getMedia() and mediaUrl() methods for accessing generated content.

Improved

  • UI type exports from @tanstack/ai-octane/ui are now strictly typed with render children constraints.
  • Tool properties now properly type part.input and part.output in ToolProps.
  • Connection adapters receive run context with threadId as their fourth argument.
  • Wire format simplified by removing CUSTOM approval events and [DONE] SSE lines.
  • Interrupt resolution now uses unified resolveInterrupt() API across all contexts.
  • Session protocol over HTTP with bearer token authentication and signed media URLs.
  • CLI support for signal handling with graceful turn cancellation on SIGINT or SIGTERM.

Summaries are written automatically from the official release notes (full changelog ↗); check the original notes before relying on a detail. AI: pricing, features and alternatives · All changelogs