feat(guardrails): add llm shield pii redaction and rehydration guardrail

litellm/proxy/guardrails/guardrail_hooks/llm_shield_proxy/__init__.py

@@ -0,0 +1,33 @@
+from typing import TYPE_CHECKING, Final
+
+from litellm.types.guardrails import SupportedGuardrailIntegrations
+
+from .llm_shield_proxy import LLMShieldProxyGuardrail
+
+if TYPE_CHECKING:
+    from litellm.types.guardrails import Guardrail, LitellmParams
+
+
+def initialize_guardrail(litellm_params: "LitellmParams", guardrail: "Guardrail") -> LLMShieldProxyGuardrail:
+    import litellm
+
+    _llm_shield_guardrail_callback: Final = LLMShieldProxyGuardrail(
+        api_key=litellm_params.api_key,
+        api_base=litellm_params.api_base,
+        guardrail_name=guardrail.get("guardrail_name", ""),
+        event_hook=litellm_params.mode,
+        default_on=litellm_params.default_on,
+    )
+
+    litellm.logging_callback_manager.add_litellm_callback(_llm_shield_guardrail_callback)
+    return _llm_shield_guardrail_callback
+
+
+guardrail_initializer_registry: Final = {
+    SupportedGuardrailIntegrations.LLM_SHIELD_PROXY.value: initialize_guardrail,
+}
+
+
+guardrail_class_registry: Final = {
+    SupportedGuardrailIntegrations.LLM_SHIELD_PROXY.value: LLMShieldProxyGuardrail,
+}

litellm/proxy/guardrails/guardrail_hooks/llm_shield_proxy/example_config.yaml

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+model_list:
+  - model_name: gpt-4o
+    litellm_params:
+      model: openai/gpt-4o
+      api_key: os.environ/OPENAI_API_KEY
+
+guardrails:
+  - guardrail_name: "llm_shield_proxy"
+    litellm_params:
+      guardrail: llm_shield_proxy
+      mode: ["pre_call", "post_call"]
+      default_on: true
+      api_base: "http://localhost:8000"
+      api_key: os.environ/LLM_SHIELD_PROXY_API_KEY