Follow Discord
Sweep 22 Sep 2026 · 17:19Z Build v2.1.280 501 read Stable v2.1.267 Latest v2.1.280 Next v2.1.280 Feeds RSS JSON llms.txt Unofficial
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.

TierYou'll noticehow much it should matter to you
Useful2my rating, 1 to 5
Signal2worth watching, 1 to 5
AreaWorkflowswhat it touches
KindBug Fixesin v2.1.257,
You'll notice

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

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.

Read from
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 →

Feedback