Claude Code v1.0.113

What: Fine-grained control over prompt caching for individual model families How to use:

# Disable caching for Haiku models only
export DISABLE_PROMPT_CACHING_HAIKU=true

# Disable caching for Sonnet models only
export DISABLE_PROMPT_CACHING_SONNET=true

# Disable caching for Opus models only
export DISABLE_PROMPT_CACHING_OPUS=true

# Or disable globally for all models (existing behavior)
export DISABLE_PROMPT_CACHING=true

Details:

• Allows optimization strategies per model tier (e.g., disable for cheaper Haiku, enable for expensive Opus)
• The global DISABLE_PROMPT_CACHING variable still works as before
• Enables cost and performance tuning based on your specific use cases
• Evidence: Sd(A) function at line 395280 replaces Pd() at line 394932 in v1.0.112

What: New v1 Sessions API endpoint alongside existing OAuth API Details:

• New endpoint: /v1/sessions/organizations/${orgUUID}/sessions via mzB() at line 412649
• Legacy endpoint: /api/oauth/organizations/${orgUUID}/code/sessions via dzB() at line 412690
• Currently defaults to legacy API (feature flag o45() at line 412718 returns false)
• Provides foundation for future migration to new API
• Evidence: Split from single function TzB() at line 412258 in v1.0.112

What: Background cache warming to maintain cache freshness during idle periods Details:

• Replays previous API requests after 4 minutes of idle time
• Sends minimal requests (max 10 tokens) to keep cache warm
• Reports telemetry via tengu_cache_warming_request event
• Currently disabled (enabled: false in ql5() configuration at line 437674)
• Configuration includes idle threshold (240s) and warmup intervals (300s)
• Evidence: Functions ql5() and Z0Q() at lines 437674 and 437683, not present in v1.0.112

What: All file writes and edits now automatically remove trailing whitespace from each line Details:

• Applies to Write tool operations (line 394194)
• Applies to Edit tool operations (line 386716)
• Preserves line endings while cleaning trailing spaces
• Ensures cleaner, more consistent code formatting
• Evidence: hC0() function at line 386524, not present in v1.0.112

What: Improved usage tracking with support for ephemeral cache tiers Details:

• Tracks ephemeral_1h_input_tokens and ephemeral_5m_input_tokens separately
• Properly merges cache creation statistics across streaming events
• Used when combining usage stats from multiple API responses
• Evidence: hYB() function at line 395825 with cache_creation object structure

What changed: OpenTelemetry headers from project/local settings now require workspace trust Why it matters: Prevents arbitrary code execution from untrusted project configurations Details:

• New function CZ1() at line 371858 detects if otelHeadersHelper comes from project/local settings
• Function ph2() at line 371865 checks workspace trust via mx(!0) before executing helpers
• Returns empty headers instead of executing untrusted code
• Part of broader security hardening effort
• Evidence: Replaces simpler bh2() at line 371852 in v1.0.112

What changed: Shell alias detection now preserves custom user configurations How it works:

• Only removes/replaces aliases pointing to the default Claude installation path
• Preserves custom aliases pointing to other locations
• Shows "Custom claude alias found" message when detected
• Displays "Keeping your existing alias configuration" to inform users

Details:

• Enhanced regex pattern allows flexible whitespace: /^\salias\s+claude\s=/ (line 377702)
• Function jk1() at line 377711 parses alias values and compares against default path
• Previous version V11() at line 377695 in v1.0.112 removed all claude aliases indiscriminately
• Evidence: Compares alias target against zv (default path) at line 377718

What changed: Session list now excludes sessions that start with API errors Details:

• Filters out sessions where firstPrompt starts with "API Error"
• Filters out sessions where summary starts with "API Error"
• Improves UI cleanliness by hiding failed/error sessions
• Evidence: YA1() function at lines 428269-428270, enhanced from QA1() at line 428139 in v1.0.112

What changed: Character-level validation replaced path-prefix checking Details:

• New NZ5() function at line 421329 validates command names contain only alphanumeric characters, colons, hyphens, and underscores
• Replaces previous logic that checked for /var, /tmp, /private path prefixes
• Provides more precise security validation
• Evidence: Used at line 421356 instead of path checks at line 421220 in v1.0.112

What changed: Telemetry initialization can be deferred based on workspace trust Details:

• New flag Fy0 at line 429230 tracks initialization state
• Initialization deferred when otelHeadersHelper is configured but trust not established
• Function NtB() at line 429241 allows manual initialization when conditions are met
• Prevents sensitive telemetry from initializing in untrusted workspaces
• Evidence: EtB variable at line 429231 with conditional logic, replacing direct initialization in VtB at line 429100 in v1.0.112

What changed: Expand/collapse hotkey changed from Ctrl+R to Ctrl+O Details:

• Affects transcript/prompt view toggle in interactive mode
• Shows in UI hints as "(ctrl+o to expand)" instead of "(ctrl+r to expand)"
• Note: Ctrl+R still used for error retry functionality (separate feature)
• Evidence: Variable F2B at line 372920 replaces B2B at line 372904 in v1.0.112

• New uzB() function at line 412641 extracts common authentication logic
• Consolidates access token and organization UUID retrieval
• Used by both dzB() and mzB() session fetching functions
• Improves code reusability and maintainability

• Functions now accept model parameter for per-model cache control
• gYB() at line 395982, dt6() at line 395373, ct6() at line 395400, lt6() at line 395849
• All call Sd(model) instead of Pd() for cache control decisions
• Enables the per-model caching feature described above

• Removed unused stream import (line 337903 in v1.0.112)
• Added PassThrough stream import as ip5 (line 441307)
• Added cwd import from node:process as ZNA (line 361192)
• Streamlines dependencies and improves code clarity