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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.248 ·

Four files are now flatly off-limits to writes

Four paths including host credentials and seed-admin can never be written, not even with approval.

You'll notice New Features
JSON All of v2.1.248
You'll noticeTier: how much it should matter to you
4Useful: my rating, 1 to 5
4Signal: worth watching, 1 to 5
PermissionsArea: what it touches
New FeaturesKind: in v2.1.248,
What probably matters to youSection of the release
What

Writing the host credentials file, writing to memory while memory is paused, writing anywhere under ~/.claude/seed-admin, and writing adopt.json are now unconditional refusals with fixed explanations. These are not prompts you can approve, and no classifier can approve them either.

Details
  • Each denial carries a fixed explanation naming why the file is harness-managed.
  • adopt.json is described as a handoff file the harness owns.
Evidence

adopt.json is the bg-fork handoff carrier and is managed by the harness; it cannot be written directly

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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