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Claude Code v2.1.116 — 67% faster /resume, safer sandbox, plugin wins
What's new in Claude Code v2.1.116
Performance, security, and developer-UX wins. /resume is up to 67% faster on 40MB+ sessions, MCP startup defers template listing until the first @-mention, /doctor works mid-response, and sandbox auto-allow stops bypassing the dangerous-path safety check. Plus /terminal-setup tuning for fullscreen editor scroll, /reload-plugins auto-installing missing dependencies, the Bash tool surfacing GitHub rate-limit hints, and agent hooks firing under main-thread --agent.
67% faster /resume on large sessions
Why: Users with 40MB+ session files waited noticeable seconds for /resume to load, especially when sessions accumulated many dead-fork entries over time.
What: Makes /resume up to 67% faster on 40MB+ sessions and handles dead-fork-heavy sessions more efficiently during load.
How: Automatic — upgrade to v2.1.116 and run /resume as usual; no config changes needed.
Faster MCP startup, lazy template listing
Why: Sessions with many stdio MCP servers paid a long startup penalty as each server exhaustively listed its resource templates up front.
What: Defers resources/templates/list to the first @-mention, cutting MCP startup time when multiple stdio servers are configured.
How: Automatic on upgrade — the first @-mention in a session triggers template fetches lazily.
/terminal-setup now tunes editor fullscreen scroll
Why: Fullscreen mode in VS Code, Cursor, and Windsurf terminals felt jerky because the editor's built-in scroll sensitivity overrode Claude Code's own.
What: /terminal-setup now configures the editor's terminal scroll sensitivity for smoother fullscreen scrolling across VS Code, Cursor, and Windsurf.
How: Run /terminal-setup once inside each editor; it writes the scroll-sensitivity settings into the editor config for you.
/doctor now works mid-response
Why: You couldn't open /doctor to diagnose a stuck or pathological turn — the slash command was blocked until the current turn finished.
What: Lets /doctor be invoked while Claude is still responding, without waiting for the turn to complete.
How: Type /doctor at any time, even during a running turn; no flags or extra config needed.
/reload-plugins auto-installs missing dependencies
Why: Plugin reloads and background auto-updates would fail or stall when a plugin referenced a dependency from a marketplace you hadn't yet added.
What: /reload-plugins and background plugin auto-update now auto-install missing plugin dependencies from marketplaces you've already added.
How: Run /reload-plugins — missing deps now resolve automatically from known marketplaces; no manual install step needed.
Bash tool surfaces GitHub API rate-limit hints
Why: Agents running gh commands against GitHub would blindly retry on rate-limit, wasting turns and sometimes triggering stricter secondary limits.
What: Bash tool now surfaces a hint when gh commands hit GitHub's API rate limit, so agents can back off instead of retrying.
How: Automatic — agents see the rate-limit hint in tool output and can choose to pause or switch strategies.
Agent hooks: frontmatter now fires under --agent
Why: Agent-level hooks: frontmatter only fired for subagent invocations, leaving main-thread --agent runs without any pre/post hook coverage.
What: Fires the agent's hooks: frontmatter when the agent runs as a main-thread agent via --agent, not only as a subagent.
How: Add hooks: to your agent frontmatter; it now activates under claude --agent as well as subagent launches.
Sandbox auto-allow no longer bypasses dangerous-path safety
Why: A permissive sandbox auto-allow rule could bypass the existing dangerous-path safety check, letting rm hit /, $HOME, or critical system directories.
What: Prevents sandbox auto-allow from bypassing the dangerous-path safety check for rm/rmdir targeting /, $HOME, or other critical system directories.
How: Automatic — existing sandbox config still works; the dangerous-path check now always runs before auto-allowing destructive commands.
Hosts: Alex Chen & Sarah Kim · Generated from the official Claude Code CHANGELOG.
Full changelog: github.com/anthropics/claude-code/CHANGELOG.md
Claude Code docs: code.claude.com/docs
- (00:00) - 67% faster /resume on large sessions
View all episodes
By AndreiWhat's new in Claude Code v2.1.116
Performance, security, and developer-UX wins. /resume is up to 67% faster on 40MB+ sessions, MCP startup defers template listing until the first @-mention, /doctor works mid-response, and sandbox auto-allow stops bypassing the dangerous-path safety check. Plus /terminal-setup tuning for fullscreen editor scroll, /reload-plugins auto-installing missing dependencies, the Bash tool surfacing GitHub rate-limit hints, and agent hooks firing under main-thread --agent.
67% faster /resume on large sessions
Why: Users with 40MB+ session files waited noticeable seconds for /resume to load, especially when sessions accumulated many dead-fork entries over time.
What: Makes /resume up to 67% faster on 40MB+ sessions and handles dead-fork-heavy sessions more efficiently during load.
How: Automatic — upgrade to v2.1.116 and run /resume as usual; no config changes needed.
Faster MCP startup, lazy template listing
Why: Sessions with many stdio MCP servers paid a long startup penalty as each server exhaustively listed its resource templates up front.
What: Defers resources/templates/list to the first @-mention, cutting MCP startup time when multiple stdio servers are configured.
How: Automatic on upgrade — the first @-mention in a session triggers template fetches lazily.
/terminal-setup now tunes editor fullscreen scroll
Why: Fullscreen mode in VS Code, Cursor, and Windsurf terminals felt jerky because the editor's built-in scroll sensitivity overrode Claude Code's own.
What: /terminal-setup now configures the editor's terminal scroll sensitivity for smoother fullscreen scrolling across VS Code, Cursor, and Windsurf.
How: Run /terminal-setup once inside each editor; it writes the scroll-sensitivity settings into the editor config for you.
/doctor now works mid-response
Why: You couldn't open /doctor to diagnose a stuck or pathological turn — the slash command was blocked until the current turn finished.
What: Lets /doctor be invoked while Claude is still responding, without waiting for the turn to complete.
How: Type /doctor at any time, even during a running turn; no flags or extra config needed.
/reload-plugins auto-installs missing dependencies
Why: Plugin reloads and background auto-updates would fail or stall when a plugin referenced a dependency from a marketplace you hadn't yet added.
What: /reload-plugins and background plugin auto-update now auto-install missing plugin dependencies from marketplaces you've already added.
How: Run /reload-plugins — missing deps now resolve automatically from known marketplaces; no manual install step needed.
Bash tool surfaces GitHub API rate-limit hints
Why: Agents running gh commands against GitHub would blindly retry on rate-limit, wasting turns and sometimes triggering stricter secondary limits.
What: Bash tool now surfaces a hint when gh commands hit GitHub's API rate limit, so agents can back off instead of retrying.
How: Automatic — agents see the rate-limit hint in tool output and can choose to pause or switch strategies.
Agent hooks: frontmatter now fires under --agent
Why: Agent-level hooks: frontmatter only fired for subagent invocations, leaving main-thread --agent runs without any pre/post hook coverage.
What: Fires the agent's hooks: frontmatter when the agent runs as a main-thread agent via --agent, not only as a subagent.
How: Add hooks: to your agent frontmatter; it now activates under claude --agent as well as subagent launches.
Sandbox auto-allow no longer bypasses dangerous-path safety
Why: A permissive sandbox auto-allow rule could bypass the existing dangerous-path safety check, letting rm hit /, $HOME, or critical system directories.
What: Prevents sandbox auto-allow from bypassing the dangerous-path safety check for rm/rmdir targeting /, $HOME, or other critical system directories.
How: Automatic — existing sandbox config still works; the dangerous-path check now always runs before auto-allowing destructive commands.
Hosts: Alex Chen & Sarah Kim · Generated from the official Claude Code CHANGELOG.
Full changelog: github.com/anthropics/claude-code/CHANGELOG.md
Claude Code docs: code.claude.com/docs
- (00:00) - 67% faster /resume on large sessions