v2.1.219

claude

fri, jul 24, 2026, 4:11 pm utcoriginal release ↗

documentation 8 topics

+new 8

Added Claude Opus 5 (`claude-opus-5`), now the default Opus model — 1M context, fast mode at $10/$50 per Mtok
Added sandbox.network.strictAllowlist setting to deny non-allowlisted hosts for sandboxed commands without prompting
Added DirectoryAdded hook that fires after `/add-dir` or the SDK `register_repo_root` control request registers a new working directory mid-session
Added mcp_server_errors to the headless stream-json init event, listing `--mcp-config` entries skipped by config validation; terminal runs print a startup warning
Added the workflowSizeGuideline settings key so the advisory Dynamic workflow size guideline can be set from any settings file; the `/config` row is hidden while one does
Added nested subagent forwarding in stream-json: subagents spawned at depth-2+ now appear when `--forward-subagent-text` is set, keyed by their spawning Agent `tool_use` id
Added HTTP status and error text to `claude mcp list` and `/mcp` when a server fails to connect, and a warning for MCP config values with hidden leading or trailing whitespace
Added the current default workflow size to the running-workflow status line, with a pointer to `/config` for changing it

~changed 5

Changed dynamic workflows to default to a medium size guideline (aim for fewer than 15 agents); pick another size or unrestricted with Dynamic workflow size in `/config`
Changed managed MCP allowlist/denylist `${VAR}` entries to resolve from the startup environment and managed-settings env instead of settings-file env
Changed the /model picker to highlight only the newest model's name, so the highlight marks the new release rather than an arbitrary subset of the list
Updated the claude-api skill to default to Claude Opus 5, with a migration path from Opus 4.8
Subagents can now spawn nested subagents up to depth 3 by default (was 1); set CLAUDE_CODE_MAX_SUBAGENT_SPAWN_DEPTH=1 to disable nesting

−removed 1

↑improved 2

Improved the "Remote Control is only available via api.anthropic.com" error to name the specific setting that caused it
Improved claude --teleport to show which repo your current checkout points at when it doesn't match the session's repo

✓fixed 8

Fixed claude -p text output dropping the answer already produced when a turn dies on a mid-stream API error
Fixed the Fable model row showing "Requires usage credits" for plans that include it, when a stale cache had baked the label in
Fixed the /model picker showing the merged Opus row as plain "Opus" instead of "Opus (1M context)"
Fixed copy-on-select inside GNU screen printing base64 into the terminal instead of copying the selection
Fixed Remote Control clients keeping a stale fast-mode status after a model switch, reconnect, or failed org check
Fixed CLAUDE_CODE_GIT_BASH_PATH on Windows exiting or being used as bash when the path isn't a bash/sh binary; it's now ignored with a warning
Fixed Vim mode: pressing ← on an empty prompt now returns to the agent view from NORMAL mode, not just INSERT
Fixed screen-reader mode rewriting the entire input line on every keystroke instead of echoing only the typed character