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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 v2.1.248 ·

Error detail is withheld when a session's output leaves the machine

When your transcript leaves this machine, many error messages print redacted and log detail locally.

You'll notice New Features
JSON All of v2.1.248
You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
Error HandlingArea: what it touches
New FeaturesKind: in v2.1.248,
New FeaturesSection of the release
What

When the session's transcript or output persists off this machine, many error messages now print without their detail and log the real detail locally instead. Slash-command dispatch, config key=value writes, MCP add/enable/reconnect, shell substitution in prompt commands, bash spawn failures, heap dumps, restarts and background session start all gained a redacted variant.

Details
  • Redacted messages carry the phrase "detail withheld on this connection".
  • Config writes now classify their outcome as kind: "save-failure" or kind: "refusal" rather than one generic failure.
  • Skill and command names and arguments are run through a sanitizer before being echoed into <local-command-stdout> and warning text.
  • Which sessions count as persisting off-box is decided by a per-session predicate whose definition is minified in the bundle, so remote, desktop and cloud coverage is not readable from the build.
Evidence

detail withheld on this connection

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

See this entry in the whole of v2.1.248 →

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