fix(core): restore session request headers (#43188)

packages/core/src/session/compaction.ts

@@ -202,6 +202,7 @@ export const make = (dependencies: Dependencies) => {
       .stream(
         LLM.request({
           model: input.model,
+          http: input.request.http,
           messages: [Message.user(summaryPrompt)],
           tools: [],
           generation: { maxTokens: summaryOutput },

packages/core/src/session/runner/llm.ts

@@ -204,6 +204,13 @@ const layer = Layer.effect(
       const promptCacheKey = /^ses_[0-9a-f]{64}$/.test(session.id) ? session.id.slice(4) : session.id
       const request = LLM.request({
         model,
+        http: {
+          headers: {
+            "x-session-affinity": session.id,
+            "X-Session-Id": session.id,
+            ...(session.parentID ? { "x-parent-session-id": session.parentID } : {}),
+          },
+        },
         providerOptions: { openai: { promptCacheKey } },
         system: [agent.info?.system, system.baseline]
           .filter((part): part is string => part !== undefined && part.length > 0)