Repeated output from background SessionStart hooks is no longer added twice
Background SessionStart hook output is skipped when Claude already has the same text from an earlier run, so the conversation is not padded with duplicates
You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
HooksArea: what it touches
Bug FixesKind: in v2.1.295,
Bug FixesSection of the release
What
A hook is a command or script you configure to run automatically at a set moment. A SessionStart hook runs when a session (one continuous conversation with Claude Code) begins or resumes. Some hooks run asynchronously, which means in the background without holding up the session, and their output is added to the conversation once it arrives.
Before, every response from such a background hook was added to the conversation. Now Claude Code drops a background SessionStart response when Claude already has the same text from an earlier SessionStart run. Output that is added now also records which command produced it and which plugin it came from. A plugin is an add-on package that extends Claude Code.
Why
If you resume a session or a SessionStart hook runs more than once, Claude no longer receives the same context again and again, and the conversation stays shorter.
