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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 ·

Failed shell commands can now come back to Claude with an extra note

When a Bash command fails, Claude may now get an extra note under some conditions, added to the error output it already received

Under the hood Internal Changes
JSON All of v2.1.304
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
Bash ToolArea: what it touches
Internal ChangesKind: in v2.1.304,
Internal ChangesSection of the release

Unclear What the extra note says and when it is added is not shown.

What

When a command run by the Bash tool (the tool Claude uses to run terminal commands) fails, Claude Code adds notes to the command's error output before Claude sees it. It can now add a second note under some conditions, separated from the first by a blank line. Before, only one note was added.

Why

Claude may get an extra hint after some failed commands, which can change how it responds to the failure.

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 doubtWhat the extra note says and when it is added is not shown.

See this entry in the whole of v2.1.304 →

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