Vibe Coding
Claude Code 2.1.281 fixes resume paths that re-sent altered history and broke the prompt cache
2.1.280 fixed two cache busters. 2.1.281 goes after resume. Resumed sessions no longer re-send earlier turns in a changed form (parallel tool calls, MCP inputs while a server reconnects, interrupted tool-search results), which had caused the API to drop prior reasoning. The prompt cache now survives a restart during a pending permission prompt, and an MCP server disconnecting with tool search off. Proxy and gateway users get fixes for streams that close cleanly but were silently truncated, and for tool calls that ran twice on duplicated stream events. If you run long headless or SDK sessions behind a gateway, this release should cut repeat cache writes.
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