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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
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Claude Code v2.1.221 ·

Design tool: clearer refusal when a project write grant is missing in non-interactive sessions

Design tool now explains exactly how to get write access when running without an interactive session.

You'll notice No documentation found Improvements
JSON All of v2.1.221
You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
ArtifactsArea: what it touches
ImprovementsKind: in v2.1.221,
ImprovementsSection of the release
What

Calling write_files or create_support_js without an active project write grant in a non-interactive session now returns a specific error explaining the route forward.

Details
  • The message directs the caller to use finalize_plan with writes and to pass the plan_token.
  • It states that a durable grant must be approved from an interactive session.
  • Carries error code design_tool_needs_project_grant_non_interactive.
Evidence

design_tool_needs_project_grant_non_interactive

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

Read from
Names in the bundlefinalize_planplan_token

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