feat: new ContextFilterPlugin #759
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Introduces a new `ContextFilterPlugin` in Java, which is designed to reduce the size of the LLM context by filtering out older turns. Here's a breakdown: * **`ContextFilterPlugin.java`**: This new plugin extends `BasePlugin` and implements logic in its `beforeModelCallback` method. It trims the `LlmRequest` contents to retain only a specified number of the most recent "model" turns and their preceding "user" turns. A key aspect is the `adjustSplitIndexToAvoidOrphanedFunctionResponses` method, which ensures that any `FunctionResponse` included in the filtered context has its corresponding `FunctionCall` also present, preventing invalid inputs to the LLM. * **`ContextFilterPluginTest.java`**: This file contains unit tests for `ContextFilterPlugin`, verifying its behavior for both scenarios where context filtering is not needed and where it successfully reduces the `LlmRequest` contents based on the configured number of invocations to keep. PiperOrigin-RevId: 859380380
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feat: new ContextFilterPlugin
Introduces a new
ContextFilterPluginin Java, which is designed to reduce the size of the LLM context by filtering out older turns.Here's a breakdown:
ContextFilterPlugin.java: This new plugin extendsBasePluginand implements logic in itsbeforeModelCallbackmethod. It trims theLlmRequestcontents to retain only a specified number of the most recent "model" turns and their preceding "user" turns. A key aspect is theadjustSplitIndexToAvoidOrphanedFunctionResponsesmethod, which ensures that anyFunctionResponseincluded in the filtered context has its correspondingFunctionCallalso present, preventing invalid inputs to the LLM.ContextFilterPluginTest.java: This file contains unit tests forContextFilterPlugin, verifying its behavior for both scenarios where context filtering is not needed and where it successfully reduces theLlmRequestcontents based on the configured number of invocations to keep.