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Claude Code v2.1.257 ·

Workflow tool rejects control/invisible characters in name and scriptPath

The Workflow tool rejects a name or scriptPath containing control or invisible formatting characters.

You'll notice Bug Fixes
JSON All of v2.1.257
You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
WorkflowsArea: what it touches
Bug FixesKind: in v2.1.257,
Bug FixesSection of the release

The Workflow tool's name and scriptPath inputs are now validated against a normalization check and rejected if they contain control or invisible formatting characters.

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Names in the bundlescriptPath
Since it was published

The entry above is what we published on the day. These lines were added later, as Anthropic's own pages caught up, and they sit beside the original rather than replacing it.

Confirmed since Anthropic's documentation has since written up scriptPath, on Agent SDK reference - TypeScript. | `scriptPath` | `string` | Path to the persisted workflow script for this run. Edit it and pass back as `scriptPath` to rerun without resending the script | agent-sdk/typescript see the edit
How sure we are
One source agreesOne thing we can check says the same as this entry.
Anthropic's documentation agreesAnthropic's documentation has since written up scriptPath, on Agent SDK reference - TypeScript.

See this entry in the whole of v2.1.257 →

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