feat: add after_tool hook needed for tool result offloading#11843
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Related Issues
Proposed Changes:
Added an
after_toolhook point to theAgent. Hooks registered underafter_toolrun after tools execute, once their result messages are instate.data["messages"], and before the exit check and the next LLM call. Use it to rewrite the freshly produced tool-result messages, for example to offload, redact, truncate, or summarize results before the next LLM call sees them. It does not run on the plain-text exit step, where no tools run. Register itlike any other hook:
hooks={"after_tool": [my_hook]}.How did you test it?
New tests
Notes for the reviewer
First step towards adding tool result offloading as a feature.
Checklist
fix:,feat:,build:,chore:,ci:,docs:,style:,refactor:,perf:,test:and added!in case the PR includes breaking changes.