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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 v2.1.304 ·

Workflow scripts with an ambiguous slash are refused

A workflow script is not run if a '/' could mean either a pattern or division; the error says to end the statement with ';'

You'll notice Improvements
JSON All of v2.1.304
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
ImprovementsKind: in v2.1.304,
ImprovementsSection of the release

Unclear It is not known whether this check is switched on by default.

What

Claude Code now checks workflow scripts before running them. If a / could be read either as the start of a regular expression (a text pattern) or as a division, the script is not run. The error message tells you to end the statement with ;. This check sits behind a remotely controlled switch.

Why

Claude Code rewrites workflow scripts slightly before running them. This check stops a script from being misread after that rewrite and doing something you did not intend.

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 doubtIt is not known whether this check is switched on by default.

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