What
monitors and workflows are now recognised plugin subdirectories, and a plugin's monitor list is checked for duplicate names, with an error you will see rather than a silent skip.
Evidence
Monitor names must be unique within a plugin
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
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 since
Anthropic's documentation has since written up monitors, on Claude Code changelog.
* Fixed plugins silently skipping a default monitors file or root SKILL.md that could not be checkedchangelog see the edit
Confirmed since
Anthropic's documentation has since written up workflows, on Model configuration.
* [Workflows are turned off](/docs/en/workflows#turn-workflows-off)model-config see the edit
Added since
A small documentation edit on Agent SDK reference - TypeScript touched a line naming workflows after this was published.
`effortLevel` accepts an [effort level](/docs/en/model-config#adjust-effort-level) name. It also accepts `"ultracode"`, which requests `xhigh` effort with [ultracode](/docs/en/workflows#let-claude-decide-with-ultracode) on. `applyFlagSetti…agent-sdk/typescript see the edit
One source agreesOne thing we can check says the same as this entry.
Anthropic's documentation agrees
A small documentation edit on Agent SDK reference - TypeScript touched a line naming workflows after this was published.