Claude Code v2.1.306

Claude Code v2.1.306 is a small fix release: claude -p no longer reports "Not logged in" inside cloud sessions started without the session's environment variables, and sessions with many MCP tools no longer see real API errors replaced by "prompt is too long".

Visit Claude Code ↗Repository ↗Release notes ↗

PaidProprietary (© Anthropic PBC; use subject to Anthropic's Commercial Terms)TypeScript (repo)★ 152,678 (as of 2026-10-21)by Anthropic

Why it matters

A two-fix patch for Anthropic's terminal coding agent. It matters to people who script Claude Code in cloud sessions or connect a lot of MCP servers, where these bugs caused confusing errors and wasted compaction.

What's new

Fixed claude -p (headless mode) reporting "Not logged in" inside cloud sessions when it was started without the session's environment variables.
Fixed real API errors being replaced by a misleading "prompt is too long" message in sessions with many MCP tools.
The same fix stops an unneeded context compaction that those sessions were triggering.

Taken from the project's own release notes. Claims about speed or accuracy are the maker's unless stated otherwise.

Try it if: You run claude -p in cloud sessions or load many MCP servers and kept hitting login or prompt-length errors.

Quick facts

Pricing	Requires a Claude account or Anthropic API access (plan details not checked)not verified
Free or paid	Paid
License	Proprietary (© Anthropic PBC; use subject to Anthropic's Commercial Terms)
Language	TypeScript (repo)
Platform	macOS, Linux, Windows; terminal, IDE, desktop
GitHub stars	★ 152,678 (as of 2026-10-21)
Maker	Anthropic

Related ranking

See how established tools compare in Best AI Coding Tools for Developers. New releases aren't scored until we review them against the rubric.

What we couldn't verify

quick_facts.pricing

Checked 2026-10-21 from the release notes's own pages. Prices and star counts change, so confirm on the official site. Listing here is not a ranking or an endorsement.