The settings panel now shows a row called "Ultracode keyword trigger" (setting id workflowKeywordTriggerEnabled, on by default). It controls whether typing the word ultracode in a prompt automatically starts a workflow — Claude Code's mode for running a multi-step task across several coordinated agents. Related messages tell you when this happened: "Dynamic workflow requested for this turn" when the keyword triggered a workflow, and "Ultracode keyword ignored for this prompt" when it didn't.
Turning the setting off lets you type the word ultracode in a prompt without it starting a workflow.
This gives a name to a setting that already existed, and a way to type the trigger word for other reasons without it kicking off a workflow you didn't intend to run.
The entry above is what we published on the day. These lines were added later, as Anthropic's own pages caught up, and they sit beside the original rather than replacing it.
| [`workflowKeywordTriggerEnabled`](#workflowkeywordtriggerenabled) | Let the word `ultracode` in a prompt start a [workflow](/docs/en/workflows); set `false` to type it without starting one | Hooks and automation | Any file |settings-reference see the edit
| Concurrency | [`CLAUDE_CODE_MAX_CONCURRENT_SUBAGENTS`](/docs/en/env-vars) | `20` subagents running at once, counting every subagent Claude spawns with the Agent tool | Refuses to spawn another subagent, returning `Concurrent subagent lim…agent-sdk/subagents see the edit
* **Per-session overrides**: `/effort ultracode` turns ultracode on for one session without this key. The `--effort ultracode` flag also turns it on for one session and requires Claude Code v2.1.203 or latersettings-reference see the edit
A small documentation edit on All settings touched a line naming ultracode after this was published.