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Sweep 25 Sep 2026 · 19:33Z Build v2.1.283 504 read Stable v2.1.274 Latest v2.1.283 Next v2.1.283 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.281 ·

Internal builds refused bypassPermissions outside a sandbox when claiming a session

Internal builds can no longer take over a session that uses bypassPermissions outside a sandbox

Under the hood Internal Changes
JSON All of v2.1.281
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
PermissionsArea: what it touches
Internal ChangesKind: in v2.1.281,
Internal ChangesSection of the release
What

Claiming a session means taking over a session that was started somewhere else. If one of the permission modes in play for that session is bypassPermissions, the claim now fails when bypassPermissionsDeniedToInternalBuild() returns true. bypassPermissions is the mode that skips permission prompts.

The error is permission_mode_not_claimable, with the message "Bypass permissions mode is not available to internal builds outside a sandbox". It tells you to start the session cold, meaning start it fresh instead of taking it over.

Why

If you see this error, the way forward is to start a new session rather than hand the existing one over.

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtThe finding does not say which builds count as internal or when that check returns true.

See this entry in the whole of v2.1.281 →

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