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Sweep 10 Nov 2026 · 02:18Z Build v2.1.322 539 read Stable v2.1.311 Latest v2.1.322 Next v2.1.322 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.281 ·

Self-hosted runner filters child env vars and classifies spawn errors

The self-hosted runner now drops invalid environment variable names for sessions and reports failed starts as a startError

Under the hood Internal Changes
JSON All of v2.1.281
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
Self-Hosted RunnerArea: what it touches
Internal ChangesKind: in v2.1.281,
Internal ChangesSection of the release
What

The self-hosted runner is the program that launches Claude Code sessions on a machine you host. Environment variables are named settings handed to a program when it starts. The runner now builds each session's variables by merging three sources: its own, those sent by the server, and enforced ones.

  • Names that are empty or contain = or a NUL character are skipped and logged.
  • CLAUDE_CODE_BRIDGE_PROMPT_SHA256 and CLAUDE_CODE_BRIDGE_MCP_CARRIER are cleared for the session.
  • A session that fails to start straight away, or starts without a process id, now comes back as a classified startError instead of raising an error.
Why

Invalid names are left out with a log line explaining which one, and a failed start is reported as a labelled result that can be handled.

See this entry in the whole of v2.1.281 →

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