feat(eap): Implement gen_ai attribute transformations

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 **Features**:
 
+- Transform deprecated `gen_ai.request.messages`, `gen_ai.response.text`, and `gen_ai.response.tool_calls` attributes into their normalized replacements (`gen_ai.input.messages` and `gen_ai.output.messages`). ([#6201](https://github.com/getsentry/relay/pull/6201))
 - Infer span descriptions via `sentry-conventions`. ([#6093](https://github.com/getsentry/relay/pull/6093))
 - Raises the size limit for the flags context to 64KiB. ([#6137](https://github.com/getsentry/relay/pull/6137))
 - Add segment_names field to Replay events. ([#6134](https://github.com/getsentry/relay/pull/6134))

relay-conventions/build/attributes.rs

@@ -40,6 +40,12 @@ pub enum DeprecationStatus {
     Backfill,
     /// Only write the replacement name.
     Normalize,
+    /// Move the value to the replacement name and apply a value transformation.
+    ///
+    /// For write behavior purposes, this produces `CurrentName` — the generic attribute
+    /// renaming logic leaves these attributes alone. Dedicated transformation code handles
+    /// the full move-and-reshape.
+    Transform,
 }
 
 /// Information about an attribute's deprecation.
@@ -126,6 +132,11 @@ fn format_write_behavior(deprecation: Option<&Deprecation>) -> String {
         DeprecationStatus::Normalize => {
             format!("WriteBehavior::NewName({name})")
         }
+        DeprecationStatus::Transform => {
+            // Transformations are handled by dedicated code, not by the generic
+            // attribute renaming logic. Leave the attribute at its current name.
+            "WriteBehavior::CurrentName".to_owned()
+        }
     }
 }
 

relay-event-normalization/src/eap/ai.rs

@@ -5,6 +5,7 @@ use relay_event_schema::protocol::Attributes;
 use relay_protocol::Annotated;
 
 use crate::ModelMetadata;
+use crate::eap::gen_ai_transform;
 use crate::span::ai;
 use crate::statsd::{Counters, map_origin_to_integration, platform_tag};
 
@@ -34,6 +35,7 @@ pub fn normalize_ai(
         return;
     }
 
+    gen_ai_transform::transform_gen_ai(attributes);
     normalize_model(attributes);
     normalize_ai_type(attributes);
     normalize_total_tokens(attributes);