Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
EffortArea: what it touches
Internal ChangesKind: in v2.1.239,
Internal ChangesSection of the release
What
The session's effort setting is no longer compared as a bare string; it is wrapped and unwrapped through helpers everywhere it is set or checked, including the /model menu, the effort slash command, SDK effort messages and the effort permission layer. No change in behaviour.
Evidence
sessionEffort
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 sinceAnthropic's documentation has since written up /model, on All settings.Cap the [effort level](/docs/en/model-config#adjust-effort-level) a session can use, leaving lower levels available. Any higher level runs at the cap instead, including one from `/effort`, the `/model` picker, `--effort`, [`CLAUDE_CODE_EFF…settings-referencesee the edit
Added sinceA small documentation edit on Agent SDK reference - TypeScript touched a line naming /model 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/typescriptsee the edit
How sure we are
Two sources agreeTwo things we can check say the same as this entry.
Anthropic's documentation agreesA small documentation edit on Agent SDK reference - TypeScript touched a line naming /model after this was published.
Anthropic's release notes agreeFixed slash-command panels (e.g. /config, /model) in fullscreen mode covering the latest messages; the conversation now stays pinned above…
