Shipped.
Daily · Wednesday, May 27, 2026

Claude Code ships twice in 24 hours, the TypeScript SDK clears two versions, and Anthropic holds its first partner broadcast.

Lead

v2.1.152 landed at 01:30 UTC and makes three changes worth tracking. /code-review --fix now applies review findings to the working tree directly after the review runs. /simplify becomes an alias for it. That is a workflow compression. The second change: a new MessageDisplay hook event lets teams intercept and transform assistant message text before it renders. The third: Auto mode drops its opt-in consent requirement. The friction gate is gone by default. github.com/anthropics/claude-code/releases

v2.1.153 followed at 00:52 UTC on the 28th, still inside the window. Status line commands now receive COLUMNS and LINES environment variables for terminal-aware output sizing. macOS background agents surface in Privacy and Security as "Claude Code" with persistent permissions. claude agents autocomplete picks up native slash commands and bundled skills. /model saves the selection as the default unless you press s to scope it to the current session only.


Release Log
Code
2026-05-27, 01:30 UTC
Claude Code v2.1.152
CODE
/code-review --fix applies review findings to the working tree. /simplify aliases to it. Skills and commands can declare disallowed-tools in frontmatter to remove tools while active. /reload-skills added. SessionStart hooks can return reloadSkills: true or set session title via hookSpecificOutput.sessionTitle. New MessageDisplay hook event for transforming assistant message text pre-render. pluginSuggestionMarketplaces managed setting for allowlisting plugin sources. Auto mode no longer requires opt-in consent. Vim mode: / in NORMAL opens reverse history search. /usage breakdown includes large session files. Thinking summaries render as markdown, capped at 10 lines (Ctrl+O for full).
2026-05-28, 00:52 UTC
Claude Code v2.1.153
CODE
Adds skipLfs option to github/git plugin marketplace sources. Status line commands receive COLUMNS and LINES env vars for terminal-aware sizing. claude agents autocomplete now suggests native slash commands and bundled skills. PR column shows PR #N (single) or N PRs (multiple). claude doctor shows results of last update attempt; shows a one-time notice when npm global install cannot auto-update. MCP servers and connectors auth notifications combined into a single message. macOS: background agents appear as "Claude Code" in Privacy and Security with persistent permissions. /model saves selection as default (press s for current session only). Bug fixes: MCP server reconnect-looping, custom API gateway OAuth credential handling, subagent MCP strict-config and bare-mode compliance, Windows PowerShell installer false success, memory usage on resume with many stored sessions, CLI exit in stream-json mode with closed stdin, malformed file:// links.
SDK
2026-05-26, 23:19 UTC 
TypeScript SDK v0.98.1
SDK-TS
Preserves directory prefix in skills.versions.create uploads. Swaps to Trusted Publishing. Renames managed-agents private-sandbox-worker example to self-hosted-sandbox-worker.
2026-05-27, 01:04 UTC
TypeScript SDK v0.99.0
SDK-TS
Adds support for custom file size caps. Fixes streaming: stop_details now carried through message_delta accumulation.
News
2026-05-27, 8:30 AM
The First Broadcast
NEWS
Anthropic's inaugural partner webinar. Covered May product news, CCAF certification updates, and introduced Anthropic Partner Academy, a new training experience for partners with the Claude Partner Certification launching alongside it. Global replay scheduled May 28 at 11:00 AM SGT.

Quiet on the Wire

No model release in the window. No API documentation update (docs.anthropic.com returned 403 throughout this sweep). No research publication. Python SDK last updated May 22, v0.104.1. No Claude Apps update detected. No system prompt update detected.

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