Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
AgentsArea: what it touches
Internal ChangesKind: in v2.1.307,
Internal ChangesSection of the release
Unclear What the marker changes in how Claude Code handles piped input is not known.
What
When you pipe input into Claude Code in stream-json format, a format where each message is a line of JSON, Claude Code now attaches a hidden marker to that input.
Why
Another part of Claude Code likely uses the marker to recognise this kind of input.
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 marker changes in how Claude Code handles piped input is not known.
