Claude Code v2.1.105 / Changelog

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9 entries

New Featuresopen

Enter Existing Worktrees #

What

The EnterWorktree tool now accepts a path parameter to switch into an existing linked worktree instead of always creating a new one.

Usage

/worktree          # create a new worktree (existing behavior)
# or, via the model:
EnterWorktree(path: "/path/to/existing-worktree")

Details

The path must be a registered worktree of the current repo (shown by git worktree list)
Mutually exclusive with the name parameter — specify one or the other
A safety check prevents removing worktrees that were entered (not created) by EnterWorktree
The exit flow returns you to the original working directory
New UI messages: "Entering worktree", "Cleaning up worktree (no pending changes)…", "This session entered an existing worktree"

Evidence

Worktree path parameter (search for "Path to an existing worktree") and enter-existing safety check (search for "enteredExisting")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

v2.1.203 EnterWorktree: Multi-Repo Workspace Support

/doctor Diagnostics with Auto-Fix #

What

The /doctor command has been rewritten as a comprehensive diagnostic dashboard with a new keybinding to auto-fix detected issues.

Usage

/doctor            # open diagnostics screen
f                  # press f to ask Claude to fix the reported issues

Details

Displays installation info, ripgrep status, update channel, auto-update permissions
Aggregates warnings from multiple sources: CLAUDE.md context usage, agent parse errors, plugin errors, keybinding issues, MCP server health, unreachable permission rules, invalid settings, version locks
New tree-view UI with severity-colored messages and suggested fixes
"f to fix with Claude" sends the diagnostics output to a prompt: "Help me fix the issues reported by /doctor below"
Read-only checks run without confirmation; destructive fixes require explicit user approval

Evidence

Doctor command context (search for "doctor:fix") and fix prompt (search for "Help me fix the issues")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Plugin Monitors (Background Watch Scripts)#

What

Plugins can now define persistent background monitors that stream events into the conversation as <task_notification> events.

Details

Define monitors in a monitors/monitors.json file at the plugin root, or inline via the monitors field in plugin.json
Each monitor has: id (unique within plugin), description, command (shell command), and an armTrigger
Arm triggers control when monitors start:
"always" — arms at session start and on plugin reload
"on-skill-invoke:<skill>" — arms the first time a specific skill is dispatched
Each stdout line from the monitor command becomes a notification; stderr goes to an output file
Monitor IDs are deduped to prevent duplicate spawns on reload
Session-scoped: monitors stop when the session ends

Evidence

Monitor schema (search for "monitors.json") and arm triggers (search for "on-skill-invoke")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

/btw Fork to Full Session #

What

After receiving a /btw side-question response, press f to fork it into a full independent conversation session.

Usage

/btw what's the syntax for Python decorators?
# ... response appears ...
# Press f to fork into a new session with this context
# Press Esc to dismiss as before

Details

New keybinding: f to fork shown in the /btw footer when a response is available
Forks the /btw context into a new session via branchAndResume
Shows "Forking into a new session…" status while the fork is in progress
Previous /btw questions in the session are now shown as a collapsed history: "(+N earlier /btw)"

Evidence

Fork keybinding (search for "f to fork") and fork status (search for "Forking into a new session")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Text Selection Keybindings #

What

Six new keybinding actions for extending text selections in the input editor.

Details

selection:extendUp — shift+up
selection:extendDown — shift+down
selection:extendLeft — shift+left
selection:extendRight — shift+right
selection:extendLineStart — shift+home
selection:extendLineEnd — shift+end
These are customizable via ~/.claude/keybindings.json

Evidence

Selection keybindings (search for "selection:extendDown")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Multi-Repository Checkout Support #

What

Two new environment variables let you configure Claude Code for multi-repo development workflows.

Usage

export CLAUDE_CODE_REPO_CHECKOUTS='{"frontend": "/home/user/frontend", "backend": "/home/user/backend"}'
export CLAUDE_CODE_BASE_REFS='{"frontend": "origin/main", "backend": "origin/develop"}'
claude

Details

CLAUDE_CODE_REPO_CHECKOUTS — JSON map of name-to-path entries for repository checkouts. Claude Code tracks branches across all configured repos.
CLAUDE_CODE_BASE_REFS — JSON map specifying the base git ref for each checkout (used for diff comparisons and bundle generation).
Both values are cached per session with singleton initialization.

Evidence

Repo checkouts env var (search for "CLAUDE_CODE_REPO_CHECKOUTS") and base refs (search for "CLAUDE_CODE_BASE_REFS")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Skill Listing Configuration #

What

New settings to control how skills are presented to Claude in the system prompt, giving users fine-grained control over context usage.

Details

skillListingMaxDescChars (default: 1536) — Per-skill description character cap. Descriptions longer than this are truncated.
skillListingBudgetFraction (default: 0.01 = 1%) — Fraction of the context window reserved for the skill listing. When the listing exceeds this, descriptions are shortened to fit.
skillOverrides — Per-skill visibility override keyed by skill name. Values:
"on" — full listing (default)
"name-only" — listed without description
"user-invocable-only" — hidden from the model but still available via /name
"off" — hidden from both model and user
These settings can be configured at policy, flag, project, user, and local settings levels.

Evidence

Skill listing settings (search for "skillListingMaxDescChars") and overrides (search for "skillOverrides")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Custom Subagent Status Lines #

What

Plugins can now define a custom status line command that generates per-subagent status displayed in the agent panel.

Details

Configure via the subagentStatusLine field in plugin settings (allowlisted alongside agent)
The command receives task metadata as JSON on stdin and should emit JSON lines on stdout
Displays custom status per-teammate in the agent panel UI

Evidence

Subagent status line (search for "subagentStatusLine")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Plugin Dependency Installation #

What

Plugins can now declare dependencies on other marketplace plugins that are automatically installed.

Details

Controlled via allowedDependencyMarketplaces in marketplace configuration
Only the root marketplace's allowlist applies — no transitive trust
Shows installation progress: "Installing plugin dependencies: [name]"
Reports success, failure, or warnings per dependency
Skips yarn/pnpm lockfiles (not supported; only bun and npm)

Evidence

Dependency installation (search for "Installing plugin dependencies")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

14 entries

Improvementsopen

/proactive Alias for /loop #

The /loop command now has /proactive as an alias, making the autonomous loop feature more discoverable.

Evidence

Alias definition (search for "proactive" near aliases)

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

v2.1.108 /rewind Gains undo Alias

Git Credential Redaction #

Git remote URLs containing credentials are now automatically redacted in logs and debug output, preventing accidental exposure of authentication tokens.

Evidence

Credential redaction (search for "redactGitRemoteCredentials")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

v2.1.75 Credential Redaction in Git Clone Logs

Plugin Path Traversal Protection #

Plugins can no longer use .. path segments to reference files outside their plugin directory. This is enforced for:

Plugin file resolution (plugin.json paths)
Marketplace name validation
Package references

Evidence

Path traversal checks (search for "path-traversal")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Conversation compaction now respects a PreCompact hook. If the hook blocks, compaction is skipped with the message "Compaction blocked by PreCompact hook." This gives users control over when context compression occurs.

Evidence

Hook integration (search for "Compaction blocked by PreCompact hook")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

v0.2.60 Conversation Compaction

Improved Tool Call Error Handling #

When the model's tool call cannot be parsed, a clearer error message is now returned: "The model's tool call could not be parsed (retry also failed). Your tool call was malformed and could not be parsed. Please retry."

Evidence

Error message (search for "model's tool call could not be parsed")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Ultrareview Billing Overhaul #

Ultrareview billing now uses a server-driven preflight check that returns proceed, blocked, or confirm states, replacing the old client-side quota check. The blocked state shows an actionable message; the confirm state shows a dialog with billing details (e.g., "This review bills as usage (~$10)").

Evidence

Preflight endpoint (search for "/v1/ultrareview/preflight")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Worktree UI Polish #

"Entering worktree" and "Cleaning up worktree (no pending changes)…" replace the old "Creating worktree…" and "Exiting worktree…" messages
Background tasks are now shown in the worktree exit dialog
"Switched to worktree" message is now context-aware (no longer appends "on branch" unconditionally)

Evidence

Worktree messages (search for "Entering worktree" and "Cleaning up worktree")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Tmux Focus-Events Diagnostic #

The /doctor output now detects when tmux focus-events is off and shows a suggestion: "add 'set -g focus-events on' to ~/.tmux.conf and reattach for focus tracking."

Evidence

Tmux diagnostic (search for "tmux focus-events off")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Model Deprecation Warnings #

A new warning system notifies users when their configured model is approaching or past its retirement date, including the deprecation date and a suggestion to switch.

Evidence

Deprecation warning generator (search for "was retired on")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

Improved MCP Large Output Handling #

The MCP tool result processor now provides format-specific guidance for large outputs. For JSON files, it suggests using jq for targeted queries. For text files, it suggests grep. For analysis tasks, it recommends using the Task tool to process the file in an isolated subagent context.

Evidence

Format-specific guidance (search for "first probe the structure")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Hyperlink Detection Improvements #

Terminal hyperlink support detection is improved with broader terminal emulator recognition, including checks for TERM_PROGRAM, LC_TERMINAL, and Kitty terminal detection.

Evidence

Hyperlink detection (search for "supportsHyperlink")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

Event Loop Stall Detection #

A new internal diagnostic detects event loop stalls (blocked main thread) and logs them with memory statistics. This helps diagnose performance issues and detect sleep/wake transitions.

Evidence

Stall detector (search for "event-loop-stall")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Managed Agents Documentation #

Comprehensive documentation has been embedded for the Managed Agents API, covering:

cURL/HTTP endpoint reference
Python and TypeScript SDK examples
Core concepts (agent lifecycle, sessions, environments)
Event streaming and session steering
Tools and skills configuration
Interactive onboarding script

Evidence

Managed Agents docs (search for "Managed Agents")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

Skills Dialog Rewrite #

The skills dialog has been completely rewritten with:

Toggle states per skill: on / name-only / user-invocable-only / off
Source and override indicator (policy, flag, author)
Improved keyboard navigation with scroll windowing

Evidence

Skills dialog toggle states (search for "user-invocable-only")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

1 entry

Bug Fixesopen

#

Fixed worktree safety: prevents removing worktrees that were entered (not created) via EnterWorktree, avoiding accidental deletion of shared worktrees (search for "enteredExisting")
Fixed stream handling for socket writes by deferring stream.end() until the write buffer is fully drained, preventing truncated output (search for "endAfterDrain")
Added defensive null check for prePlanMode property to prevent crashes when the property is undefined (search for "prePlanMode")
Fixed array last-element access using .at(-1) instead of manual indexing, preventing potential off-by-one errors
Added type safety check for non-Array inputs to token counting function, returning 0 instead of throwing (search for "Array.isArray")
Fixed async cleanup race condition in caffeinate (sleep prevention) by capturing the reference before try-finally blocks
Added optional chaining for querier.onResponse() to prevent null reference crashes
Fixed UNC path permission checks to allow certain whitelisted UNC paths that pass security validation

7 entries

Removalsopen

Think Back / Year in Review #

The Think Back feature ("Your 2025 Claude Code Year in Review" ASCII animation) has been completely removed — all plugin detection, animation generation, player scripts, and associated slash commands are gone.

Evidence

Removed strings (search for "thinkback" returns 0 results in new version)

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

v2.0.66 Think-back/Year in Review Feature

Proactive Auto-Enable Setting #

The proactive.autoEnable setting (which controlled whether autonomous background operation was auto-activated at launch) has been removed. The /proactive alias for /loop replaces the previous configuration approach.

Evidence

Setting removed (search for "autoEnable" near proactive in old file only)

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

v2.1.92 Autonomous Proactive Auto-Activation [In Development]

Time-Based Microcompaction #

The time-based microcompaction system (tengu_time_based_microcompact, tengu_slate_heron) — which cleared old tool results when a time gap was detected — has been completely removed.

Evidence

Removed telemetry event and feature flag (search for "TIME-BASED MC" or "tengu_slate_heron")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Session Memory Compaction #

The tengu_sm_compact session memory compaction system, which automatically truncated conversation history using a token-counting approach, has been removed. It is replaced by the new reactive compaction system (see In Development section).

Evidence

Removed orchestrator (search for "tengu_sm_compact" returns 0 results in new version)

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Plugin Enable CLI Command #

The claude plugin enable CLI command has been removed. Plugin management is now handled through the /plugin slash command.

Evidence

Removed function G$A (search for "Enabling plugin" returns 0 results in new version)

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

v2.1.75 Skill/Prompt Aliases

Plugin Validate and Update Marketplace CLI Commands #

The claude plugin validate and claude plugin update-marketplace CLI commands have been removed.

Evidence

Removed functions H$A and W$A (search for "Installing marketplace" returns 0 results in new version)

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

MCP Tool Classification Lists #

The large static classification lists (500+ MCP tool names categorized as "search" or "read") have been removed. The classification likely uses a different approach now.

Evidence

Removed sets fVz and TVz (search for "slack_search_public" returns 0 results in new version)

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

5 entries

In Developmentopen

#

Features with infrastructure added but not yet enabled. These are shipped "dark" and may become available in future versions.

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

Reactive Compaction [Gradual Rollout]#

Feature flag

tengu_cobalt_raccoon On for this account, and not off by default

The flag server returned on for the one account this site reads, and nothing in this release compiles it off by default. The compiled default is shown below, and says which it is when we cannot read one: a fifth of gates compile in a string or a number rather than on or off, and most published releases have no gate table behind them at all. No client can see what the server returns for your account.

This account: on · anonymous baseline: on · compiled default in v2.1.105: no gate table built for this version

These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.

Read once, for one account on one subscription tier, against v2.1.105. It isn't a statement about your account. What a flag value here can and cannot tell you

What

A new conversation compaction system that automatically summarizes older messages when the prompt exceeds context limits, using binary search to find the optimal compaction boundary.

Status

Feature-flagged behind tengu_cobalt_raccoon (default: false). Disabled in non-interactive mode.

Details

Replaces the removed tengu_sm_compact system with a more sophisticated approach
Uses binary search to determine how many message groups to preserve vs. summarize
Sends older messages to a model fork for summarization
Includes retry logic (strips media on size errors), empty-response detection, and PreCompact hook support
Extensive telemetry: trigger, success, duration, pre/post token counts, group counts
When enabled, triggers automatically during conversation turns when token limits are approached

Evidence

Feature gate (search for "tengu_cobalt_raccoon") returns !1 (false) as default

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Session Recap (Away Summary) [Gradual Rollout]#

What

When you return to a session after being away for 5+ minutes, Claude generates a brief recap of where things left off.

Status

Feature-flagged behind tengu_sedge_lantern (default: false). Can be force-enabled with CLAUDE_CODE_ENABLE_AWAY_SUMMARY=1.

Details

Tracks focus/blur events to detect when the user steps away
On return, generates a recap: "under 40 words, 1-2 plain sentences, no markdown. Lead with the overall goal and current task, then the one next action."
Toggleable in /config via awaySummaryEnabled setting (when the flag is on)
Recap can be cancelled, and shows "No recap available" if generation fails
A /recap command is also available to manually trigger a recap
SDK event: memory_recall emitted when memories are surfaced

Orphaned Tip: ⚠️ Users who get the flag enabled may see "(disable recaps in /config)" — but the feature doesn't work unless the flag is active.

Evidence

Feature gate (search for "tengu_sedge_lantern") and env override (search for "CLAUDE_CODE_ENABLE_AWAY_SUMMARY")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

v2.1.101 Away Summary [In Development]

Memory Rating Survey [In Development]#

Feature flag

tengu_dunwich_bell Off in both readings

The flag server returned off for the account this site reads and for the anonymous baseline. A reading of off cannot rule out a rollout these two readings sit outside of.

This account: off · anonymous baseline: off · compiled default in v2.1.105: no gate table built for this version

These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.

Read once, for one account on one subscription tier, against v2.1.105. It isn't a statement about your account. What a flag value here can and cannot tell you

What

A "Did this help? (optional)" prompt allowing users to rate recalled memories as good or bad.

Status

Stubbed — the gate function H_5() always returns !1 (false). The UI components (rating buttons with thumbs up/down hover states) are fully built but unreachable.

Details

Rating buttons component exists with [Good]/[Bad] options
Keyboard shortcuts (+ and - keys) are wired up for rating
The infrastructure includes both memory-specific and general feedback survey paths
General feedback survey is also gated behind tengu_dunwich_bell (default: false)

Evidence

Stubbed gate (search for "Did this help?") and gate function returning !1

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Prompt Cache Break Detection [In Development]#

What

Internal diagnostic that detects when the prompt cache is invalidated between API calls, identifying the cause (system prompt change, tool schema change, model change, TTL expiry).

Status

Active internally for telemetry only (tengu_prompt_cache_break event). Not user-visible.

Details

Snapshots system prompt, tools, and model between requests
When a cache break is detected, classifies the cause: system prompt changed, tools changed, model changed, betas changed, possible 5min or 1h TTL expiry, or unknown
Logs [PROMPT CACHE BREAK] with cause details
Helps Anthropic optimize prompt caching behavior

Evidence

Cache break detection (search for "PROMPT CACHE BREAK" and "tengu_prompt_cache_break")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Claude Code v2.1.105

New Featuresopen

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Improvementsopen

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Bug Fixesopen

Removalsopen

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In Developmentopen

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Anthropic’s official release notes