claude-code

Claude Code 2.1.121: Memory Fixes, MCP Retries, Fullscreen UX

Claude Code 2.1.121 fixes critical memory leaks in image processing and transcript handling, adds MCP auto-retry on startup errors, and improves fullscreen UX with scrollable dialogs and better URL handling.

TL;DR

Fixed unbounded memory growth when processing images and long transcripts — critical for extended sessions
MCP servers now auto-retry on transient startup errors instead of staying disconnected
Fullscreen mode improvements: scroll no longer jumps, dialogs are scrollable, URLs click correctly
Bash tool now survives directory deletion mid-session; `/usage` refreshes stale OAuth tokens automatically

New

alwaysLoad option for MCP servers — skip tool-search deferral and always expose all tools from a server
claude plugin prune — remove orphaned auto-installed plugin dependencies; `plugin uninstall --prune` cascades
Type-to-filter search at /skills — find skills in long lists without scrolling
PostToolUse hooks for all tools — replace tool output via `hookSpecificOutput.updatedToolOutput`, no longer MCP-only
Scrollable terminal dialogs — arrow keys, PgUp/PgDn, home/end, and mouse wheel work in fullscreen and non-fullscreen
Vertex AI mTLS support — X.509 certificate-based Workload Identity Federation for ADC
LSP diagnostic expansion — click/ctrl+o to expand diagnostic summaries with hint text
OpenTelemetry enhancements — added `stop_reason`, `gen_ai.response.finish_reasons`, and `user_system_prompt` to LLM spans
VSCode voice dictation language setting — respects `accessibility.voice.speechLanguage` when no Claude Code language configured
VSCode /context dialog — native token usage dialog replaces inline display

Fixed

Unbounded memory growth (multi-GB RSS) when processing many images in a session
/usage leaking up to ~2GB of memory on machines with large transcript histories
Memory leak when long-running tools fail to emit a clear progress event
Bash tool becoming permanently unusable when the directory Claude was started in is deleted or moved mid-session
--resume crashing on startup in external builds
--resume failing on large sessions when a transcript line was corrupted by unclean shutdown — corrupt line now skipped
thinking.type.enabled error when using Bedrock application inference profile ARNs
Microsoft 365 MCP OAuth failing with duplicate or unsupported prompt parameter
Scrollback duplication when pressing Ctrl+L or triggering redraw in non-fullscreen mode on tmux, GNOME Terminal, Windows Terminal, and Konsole
claude.ai MCP connectors silently disappearing on transient auth errors at startup
"Always allow" rules for built-in tools in remote sessions not surviving worker restarts
NO_PROXY not being respected for all HTTP clients in native build
Managed settings approval prompt exiting session even when accepted — now applies and continues
/usage returning "rate limited" after stale OAuth token — now refreshes automatically
Invalid legacy enum values in settings.json invalidating entire settings file
/usage dialog content clipped when no-flicker mode is off
/focus showing "Unknown command" when fullscreen renderer is off — now explains how to enable
Embedded grep/find/rg shell wrappers failing when running binary is deleted mid-session — now falls back to installed tools
Peak file descriptor usage during find in Bash tool on large directory trees