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Sweep 08 Oct 2026 · 18:53Z Build v2.1.295 516 read Stable v2.1.286 Latest v2.1.295 Next v2.1.295 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.290 ·

Shell command parsing gains wildcard detection and a reworded nesting error

Claude Code's shell command parser can now spot wildcard patterns, and its error for deeply nested command substitutions is reworded

You'll notice Improvements
JSON All of v2.1.290
You'll noticeTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
PermissionsArea: what it touches
ImprovementsKind: in v2.1.290,
ImprovementsSection of the release

Unclear How the new wildcard check is used in permission decisions is not known.

What

Claude Code reads shell commands before running them so it can check permissions. Two things changed in that reading:

  • A new check spots wildcard patterns, such as *.txt. Plain words and numbers count as wildcards when they contain *, ? or [. Quoted strings and variable expansions do not. Any other part of a command is treated as possibly a wildcard.
  • A command substitution is a command written inside another command, such as $(...). When these are nested too deeply, the error now reads "command substitutions nested too deeply".
Why

These changes sit in the code that decides whether a shell command needs your permission, so those checks may become stricter.

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 doubtHow the new wildcard check is used in permission decisions is not known.

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