Claude Code 2.1.251 adds model-switch hooks and live subagent streaming
Claude Code 2.1.251 adds PreModelSwitch and PostModelSwitch hook events that block, confirm, or annotate a model switch, and live-streams a foreground subagent's tool calls and results to Remote Control clients. A spend-limit bar lands in /usage with per-session prompt-cache hit metrics in /cost, alongside security fixes for symlink-swapped file tools and plugin path traversal.
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GITHUB.COMClaude Code · Chronicle
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FAQWhat did Claude Code announce on AUG 28, 2026?
Claude Code 2.1.251 adds PreModelSwitch and PostModelSwitch hook events that block, confirm, or annotate a model switch, and live-streams a foreground subagent's tool calls and results to Remote Control clients. A spend-limit bar lands in /usage with per-session prompt-cache hit metrics in /cost, alongside security fixes for symlink-swapped file tools and plugin path traversal.
What is Claude Code?
Anthropic's terminal-native coding agent. It reads your codebase, edits files, runs tests, and turns issues into PRs with minimal hand-holding.
Where is the official source for this announcement?
It was published by Anthropic on AUG 28, 2026 via github.com, the company's official channel. AgentMaps cites the primary source for every charted signal.