[Release] anthropics/claude-code v2.1.94: v2.1.94

Claude Code v2.1.94 introduces Amazon Bedrock support via Mantle, increases default effort levels for API users, and adds enhanced Slack integration with compact channel headers. The release includes significant bug fixes for rate-limiting handling, macOS login issues, plugin skill invocation naming, and terminal rendering problems across multiple platforms including VSCode.

Key Points

• •Enable Amazon Bedrock integration by setting `CLAUDE_CODE_USE_MANTLE=1` environment variable
• •Default effort level changed to 'high' for API-key, Bedrock, Vertex, Foundry, Team, and Enterprise users — adjust with `/effort` command
• •Plugin skills now use frontmatter `name` field for stable invocation names instead of directory basename
• •Fixed critical 429 rate-limit bug where agents appeared stuck; errors now surface immediately instead of silent waiting
• •Resolved macOS Console login failures with locked keychain — errors now surfaced with `claude doctor` diagnostics
• •Fixed plugin skill hooks defined in YAML frontmatter being silently ignored
• •Improved Slack MCP integration with compact `Slacked #channel` headers featuring clickable channel links
• •Fixed terminal rendering issues including scrollback duplication, multiline prompt indentation, and alt-screen ghost lines
• •Enhanced `--resume` functionality to directly resume sessions from other worktrees without printing cd commands
• •Fixed UTF-8 corruption in stream-json input/output when chunk boundaries split multibyte characters (CJK text)

Workflow Diagram

Concepts

Artifacts (4)

CLAUDE_CODE_USE_MANTLE=1

"skills": ["./"]
# Uses frontmatter 'name' field for invocation instead of directory basename

/effort high
/effort medium
/effort low

---
name: my-skill
keep-coding-instructions: true
---
# Skill implementation