Claude Code v2.0.58

What: Resume sessions directly by providing a session ID or title as an argument to the /resume command, bypassing the interactive picker.

How to use:

# Resume by session ID
/resume abc123def

# Resume by exact title (when enabled)
/resume "My Project Session"

Details:

• Returns helpful error messages for "session not found" or "multiple matches" scenarios
• Falls back to interactive picker when no argument provided
• Evidence: u_3 at line 497346, YV9() at line 497237, BV0() at line 497245 in v2.0.58

What: When rejecting a file edit permission, you can now type feedback directly in the permission dialog instead of having to provide it separately.

How to use:

• When prompted for file edit permission, select "No"
• Type your feedback in the inline input field with placeholder "Type here to tell Claude what to do differently"
• Submit to reject with your feedback attached

Details:

• Only appears when the rejection feedback callback is provided
• Validates that feedback is not empty before allowing rejection
• Evidence: Jf2() at line 415495 with onRejectFeedbackChange parameter, Cf2() at line 415835 in v2.0.58

What: API key users can now specify custom beta headers to include in API requests via a new CLI option.

How to use:

claude --betas context-1m-2025-08-07

Details:

• Only available for API key authentication (not web/OAuth)
• Currently only context-1m-2025-08-07 is in the allowlist
• Invalid betas trigger warnings but don't fail execution
• Evidence: wn0() at line 67682, $n0 allowlist at line 67714, CLI option at line 526721 in v2.0.58

What: New experimental configuration option criticalSystemReminder_EXPERIMENTAL for including critical system reminders in the context.

Details:

• Returns content blocks of type critical_system_reminder
• Available through SDK configuration
• Evidence: WK5() at line 343450, case handler at line 470677 in v2.0.58

What: Preview a session's full conversation history before resuming it from the session picker.

How to use:

• In the session picker, press P to preview the selected session
• View the full message history
• Press Enter to resume or Esc to return to list

Details:

• Shows complete transcript with all messages
• Displays session metadata (date, message count, branch)
• Evidence: GV9() at line 496704, preview state at line 496957 in v2.0.58

What: Infrastructure for grouping related sessions (forks/branches with same session ID) in a collapsible tree structure.

Details:

• Currently disabled via feature flag (xg() returns false)
• Groups sessions by session ID with expand/collapse support
• Uses "▼" and "▶" indicators for group state
• Evidence: QV9() at line 496553, h_3() grouping at line 497146, xg() flag at line 513608 in v2.0.58

What: When one tool in a concurrent execution fails, sibling tools are now gracefully aborted with a clear "Sibling tool call errored" message instead of continuing independently.

Details:

• New hasErrored flag tracks error state across concurrent tools
• getAbortReason() distinguishes between user interruption and sibling errors
• Synthetic error messages clearly indicate why tools were aborted
• Evidence: Class y30 at line 411600, createSyntheticErrorMessage() at line 411636, getAbortReason() at line 411653 in v2.0.58

What: Guest passes now display as visual ASCII art cards instead of a simple list, with a cleaner layout showing remaining pass count.

Details:

• Available passes shown as full cards: ┌─────────┐ ) CC ✻ ┊( └─────────┘
• Redeemed passes shown dimmed with torn corner effect
• Header shows "Guest passes · N left" with count
• Simplified interaction: Enter copies link directly
• Evidence: TV9() at line 497932, card renderer at line 498017 in v2.0.58

What: The session memory template now includes a "Current State" section and improved error tracking.

Details:

• New "# Current State" section for tracking active work, pending tasks, and next steps
• "User Corrections / Mistakes" renamed to "# Errors & Corrections" with expanded scope
• Now captures both errors encountered and user corrections
• Evidence: Template at line 518364 in v2.0.58 vs line 517543 in v2.0.57

What: The resume session picker now supports renaming sessions and includes additional keyboard shortcuts.

Details:

• Press R to rename the selected session inline
• Press P to preview session (when enabled)
• Shows expand/collapse hints for grouped sessions
• Evidence: BSA() at line 496790, rename state at line 496939 in v2.0.58

What: Claude's background information now references Opus 4.5 as the most recent frontier model instead of Sonnet 4.5.

Details:

• Affects Claude's self-awareness when discussing model capabilities
• Evidence: Jy3 = "Claude Opus 4.5" at line 509270 in v2.0.58

What: On Windows, the managed settings path now checks C:\Program Files\ClaudeCode first before falling back to C:\ProgramData\ClaudeCode.

Details:

• Provides flexibility for enterprise deployments
• Evidence: gw function at line 511827 in v2.0.58

What: Fixed an edge case where time durations could display as "60s" or "60m" instead of properly rolling over to the next unit.

Details:

• Math.round() on 59.5+ seconds would produce 60, now properly rolls over
• Adds checks: if (G === 60) ((G = 0), B++) for seconds→minutes
• Adds checks: if (B === 60) ((B = 0), Q++) for minutes→hours
• Evidence: VE() at line 230586, rollover logic at lines 230595-230596 in v2.0.58