2.1.51 — Claude code - Product release notes & changelog tool

Added claude remote-control subcommand for external builds, enabling local environment serving for all users.
Updated plugin marketplace default git timeout from 30s to 120s and added CLAUDE_CODE_PLUGIN_GIT_TIMEOUT_MS to configure.
Added support for custom npm registries and specific version pinning when installing plugins from npm sources
BashTool now skips login shell (-l flag) by default when a shell snapshot is available, improving command execution performance. Previously this required setting CLAUDE_BASH_NO_LOGIN=true.
Fixed a security issue where statusLine and fileSuggestion hook commands could execute without workspace trust acceptance in interactive mode.
Tool results larger than 50K characters are now persisted to disk (previously 100K). This reduces context window usage and improves conversation longevity.
Fixed a bug where duplicate control_response messages (e.g. from WebSocket reconnects) could cause API 400 errors by pushing duplicate assistant messages into the conversation.
Added CLAUDE_CODE_ACCOUNT_UUID, CLAUDE_CODE_USER_EMAIL, and CLAUDE_CODE_ORGANIZATION_UUID environment variables for SDK callers to provide account info synchronously, eliminating a race condition where early telemetry events lacked account metadata.
Fixed slash command autocomplete crashing when a plugin’s SKILL.md description is a YAML array or other non-string type
The /model picker now shows human-readable labels (e.g., “Sonnet 4.5”) instead of raw model IDs for pinned model versions, with an upgrade hint when a newer version is available.
Managed settings can now be set via macOS plist or Windows Registry. Learn more at https://code.claude.com/docs/en/settings#settings-files