Coding & agents New
Claude Code 2.1.300 fixes lost resumed context and tightens hook validation
Published:
Anthropic published Claude Code v2.1.300 at 20:24 CEST on October 14, after the previous edition. Its release notes describe fixes for headless and Agent SDK sessions losing recent messages or compaction summaries when resuming after interrupted, retried or output-limited replies.
The release also validates updatedInput returned by PreToolUse and PermissionRequest hooks: unknown keys are dropped, and input rejected by the tool denies the call. Local session transcripts now also record each API request's system prompt, tools and parameters, increasing the information present in a transcript a user chooses to share.
Other additions include separate five-minute and one-hour cache-write token counts in OpenTelemetry, GenAI trace attributes, and the /advisor feature on Claude Platform on AWS. An advisor does not run until selected.
Caveat. These are the maintainer's release claims, not independent regression-test results. This issue reports the software release; it does not claim a new Claude model or install the update.
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