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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

Claude Code v2.1.309 ·

Failed background commands now show both their output and their error messages

When a background command fails, Claude Code now reads its saved output and shows it together with any error messages

You'll notice Bug Fixes
JSON All of v2.1.309
You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
Background TasksArea: what it touches
Bug FixesKind: in v2.1.309,
Bug FixesSection of the release
What

A background command keeps running while you and Claude carry on. Some send their normal output (stdout) to a file. Before, if such a command failed, Claude Code read that file only when the command printed no error messages (stderr).

Now, when the command fails, Claude Code always reads the file. If there are error messages too, it combines the two.

Why

When a background command fails, you and Claude see what it printed as well as what went wrong, instead of only the error messages.

See this entry in the whole of v2.1.309 →

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