What probably matters to youSection of the release
Unclear What effect setting omitClaudeMd has, beyond its name, is not stated.
What
The set of recognized configuration keys for launching subagents or skills has gained a new option, omitClaudeMd, alongside existing options like initialPrompt, memory, background, isolation, and observer. It's also now accepted as an optional field in the schema used for launching agents/tasks.
Why
An omitClaudeMd option implies subagents can now be launched without the project's CLAUDE.md file (a file of project-specific instructions for Claude) being included in their context, giving more control over what a spawned agent sees.
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.
Confirmed sinceAnthropic's documentation has since written up omitClaudeMd, on Explore the .claude directory.| `agents/*.md` | `name`, `description`, `tools`, `disallowedTools`, `model`, `permissionMode`, `maxTurns`, `skills`, `mcpServers`, `hooks`, `memory`, `background`, `effort`, `isolation`, `color`, `initialPrompt`, `omitClaudeMd`, `experime…claude-directorysee the edit
Added sinceA small documentation edit on Create custom subagents touched a line naming omitClaudeMd after this was published.* **CLAUDE.md files**: every level of the [CLAUDE.md hierarchy](/docs/en/memory#how-claude-md-files-load) the main conversation loads, including `~/.claude/CLAUDE.md`, project rules, `CLAUDE.local.md`, managed policy files, and any [`AGENT…sub-agentssee the edit
How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtWhat effect setting omitClaudeMd has, beyond its name, is not stated.
Anthropic's documentation agreesA small documentation edit on Create custom subagents touched a line naming omitClaudeMd after this was published.
Anthropic's release notes agreeAdded omitClaudeMd to agent frontmatter and --agents JSON, letting custom and plugin subagents run without user, project and local CLAUDE.md…
