Extended thinking gains a new display: "omitted" option that skips streaming thinking tokens for faster time-to-first-text-token, while preserving the signature for multi-turn continuity
Claude Code 2.1.77 fixes a critical security bug where PreToolUse hooks returning "allow" could bypass deny permission rules, including enterprise managed settings
Fast mode pricing is now flat at $30/$150 MTok across the full 1M token context window (removing the previous tiered <200K / >200K pricing)
Session quality surveys now appear for Bedrock, Vertex, and Foundry users by default (previously they were off for third-party providers)
The PermissionRequest hook can now auto-approve specific permission dialogs programmatically, documented with a new example in the hooks guide
Fixed "Always Allow" on compound bash commands (e.g. cd src && npm test) saving a single rule for the full string instead of per-subcommand, leading to dead rules and repeated permission prompts
Fixed --resume silently truncating recent conversation history due to a race between memory-extraction writes and the main transcript
Fixed Write tool silently converting line endings when overwriting CRLF files or creating files in CRLF directories
Fixed auto-updater starting overlapping binary downloads when the slash-command overlay repeatedly opened and closed, accumulating tens of gigabytes of memory
Fixed memory growth in long-running sessions from progress messages surviving compaction
Fixed cost and token usage not being tracked when the API falls back to non-streaming mode
Fixed CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS not stripping beta tool-schema fields, causing proxy gateways to reject requests
Fixed Bash tool reporting errors for successful commands when the system temp directory path contains spaces
Fixed Claude Desktop sessions incorrectly using the terminal CLI's configured API key instead of OAuth
Fixed git-subdir plugins at different subdirectories of the same monorepo commit colliding in the plugin cache
Fixed a race condition where stale-worktree cleanup could delete an agent worktree just resumed from a previous crash
Fixed input deadlock when opening /mcp or similar dialogs while the agent is running
Fixed IDE integration not auto-connecting when Claude Code is launched inside tmux or screen
Fixed iTerm2 session crash when selecting text inside tmux over SSH
Fixed clipboard copy silently failing in tmux sessions
Updated /reload-plugins description: now reports counts for each reloaded component and flags any load errors, rather than just reporting what was loaded. [line 48] [Source]
Session quality surveys now appear by default for Bedrock, Vertex, and Foundry users (previously they were off for third-party providers). [line 71] [Source]
feedbackSurveyRate setting can now be used to control survey frequency instead of disabling entirely; surveys are also disabled when DISABLE_TELEMETRY or CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC is set. [line 20] [Source]
After installing a plugin, you must now run /reload-plugins to activate it (previously commands were described as immediately available). [line 167] [Source]
/reload-plugins now shows counts for reloaded commands, skills, agents, hooks, plugin MCP servers, and plugin LSP servers. [line 382] [Source]
New CLAUDECODE environment variable: set to 1 in shell environments spawned by Claude Code (Bash tool, tmux sessions), useful to detect when a script is running inside Claude Code. [line 23] [Source]
New CLAUDE_CODE_SKIP_FAST_MODE_NETWORK_ERRORS variable: allows fast mode when the organization status check fails due to a network error (useful for corporate proxies). [line 62] [Source]
Fast mode pricing is now flat at $30/$150 MTok across the full 1M token context window — the previous tiered <200K / >200K pricing distinction has been removed. [line 40] [Source]
New example: "Auto-approve specific permission prompts" showing how to use the PermissionRequest hook to automatically answer permission dialogs (e.g., auto-approving ExitPlanMode) without user interaction, including how to set a specific permission mode via updatedPermissions. [lines 326-384] [Source]
Hook file changes are now picked up automatically by the file watcher — no longer require a session restart or /hooks review to take effect. [line 644] [Source]
The permission_suggestions output field now uses addRules format (with toolName, ruleContent, behavior, destination) instead of the old toolAlwaysAllow format. [line 1076] [Source]
New "Permission update entries" section documenting all entry types for updatedPermissions and permission_suggestions: addRules, replaceRules, removeRules, setMode, addDirectories, removeDirectories, with their fields and destination options (session, localSettings, projectSettings, userSettings). [lines 1118-1147] [Source]
New MCP servers added: Mixpanel (analytics), Krisp (meeting transcripts/notes), and Craft (notes/second brain). [lines 429, 652, 726]
Plugin MCP server lifecycle clarified: run /reload-plugins to connect or disconnect MCP servers when enabling/disabling plugins mid-session. [line 973] [Source]
feedbackSurveyRate description updated: setting to 0 suppresses surveys entirely; noted as useful for Bedrock/Vertex/Foundry where the default sample rate does not apply. [line 189] [Source]
Plugin subagents do not support hooks, mcpServers, or permissionMode frontmatter fields for security reasons — these fields are ignored when loading agents from a plugin. Workaround: copy the agent file into .claude/agents/ or ~/.claude/agents/. [line 201] [Source]
New "Controlling thinking display" section: the display field on thinking configuration accepts "summarized" (default) or "omitted" (empty thinking field, signature preserved for multi-turn). Also documents pricing for display: "omitted" (billed the same, zero visible tokens). [lines 184-215] [Source]
Disabled thinking can now also be specified as {type: "disabled"} in addition to omitting the parameter. [line 130] [Source]
New "Controlling thinking display" section: introduces display: "omitted" to skip streaming thinking tokens for lower latency, with full code examples for curl and notes on SDK support. [lines 106-190] [Source]
Streaming event documentation updated: content_block_start for thinking blocks now includes a signature field; when display: "omitted", only a signature_delta is emitted with no thinking_delta events. [lines 250, 284-305]
Pricing section expanded with display: "omitted" breakdown: billed tokens are the same as summarized, but zero thinking tokens appear in the response. [lines 614-632] [Source]
Best practices updated to recommend display: "omitted" for latency-sensitive applications that don't display thinking content. [line 641] [Source]
Clarified that large PDFs can fail even when using the Files API (not just when sending inline), and suggested downsampling embedded images as a mitigation. [line 26] [Source]
Added "Monthly Spend Limit" column to the tier requirements table, showing the maximum spend per calendar month at each tier ($100/$500/$1,000/$200,000/no limit). [line 33] [Source]
Added note that requests with many large images can fail before reaching the 600-image count limit even when using the Files API; recommends downsampling before uploading. [line 23] [Source]