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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.239 ·

Session effort becomes a tagged value

Effort is stored as a tagged object, and the effort setting is cleared when no specific level applies.

Under the hood Internal Changes
JSON All of v2.1.239
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 now an object with a kind rather than a bare string. Metadata reports an effort level only when the kind is a level, and the --effort setting is cleared for any other kind.

Details
  • Permission-mode transitions build their metadata through a rule-based helper.
  • When the notifier reports worker permission-mode recording as enabled, transitions additionally record the worker's permission mode as internal metadata.
Evidence

worker_permission_mode

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Read from
Names in the bundle--effort
Since it was published

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 --effort, on Model configuration. In those cases `--effort ultracode` starts the session with ultracode off, at the highest effort level the model and any cap allow, up to `xhigh`. model-config see the edit
Added since A small documentation edit on CLI reference touched a line naming --effort after this was published. | `--effort` | Set the [effort level](/docs/en/model-config#adjust-effort-level) for the current session. Options: `low`, `medium`, `high`, `xhigh`, `max`, or `ultracode`. Available levels depend on the model. `ultracode` requests `xhigh` … cli-reference see the edit
How sure we are
One source agreesOne thing we can check says the same as this entry.
Anthropic's documentation agreesA small documentation edit on CLI reference touched a line naming --effort after this was published.

See this entry in the whole of v2.1.239 →

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