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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 v2.1.251 ·

What the confined mode changes across cloud, permissions and plugin loading

Confined mode also blocks cloud sessions and changes how MCP servers and hooks load.

Under the hood No documentation found Internal Changes
JSON All of v2.1.251
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
4Signal: worth watching, 1 to 5
Plugin EvalArea: what it touches
Internal ChangesKind: in v2.1.251,
What probably matters to youSection of the release
What

The same confined-evaluation flag also stops cloud and background session creation, restricts always-allow rules to command-line sources, alters file hard-link and settings-source checks, and changes how MCP servers and hooks are loaded.

Details
  • Cloud session refusal surfaces as the reason eval_confined.
  • The flag is written by Claude Code when spawning its own subprocess, not read from user config.
Evidence

eval_confined

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

Read from
Names in the bundleCLAUDE_CODE_EVAL_CONFINED
How sure we are
One source agreesOne thing we can check says the same as this entry.
The name it cites is new in this buildNew in this build: CLAUDE_CODE_EVAL_CONFINED

See this entry in the whole of v2.1.251 →

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