From d5e83fefdaaa8991354b25aa72afcb484e2a9137 Mon Sep 17 00:00:00 2001 From: Dax Raad Date: Tue, 18 Aug 2026 11:38:11 -0400 Subject: [PATCH] fix(core): reuse prompt cache for forks --- packages/core/src/session/model-request.ts | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/packages/core/src/session/model-request.ts b/packages/core/src/session/model-request.ts index f744983afe..5d8254740d 100644 --- a/packages/core/src/session/model-request.ts +++ b/packages/core/src/session/model-request.ts @@ -231,7 +231,8 @@ export const layer = Layer.effect( http: { headers: SessionModelHeaders.make(session, app), }, - promptCacheKey: SessionPromptCacheKey.make(session.id), + // TODO: Persist cache lineage so nested forks reuse the root session's cache key. + promptCacheKey: SessionPromptCacheKey.make(session.fork?.sessionID ?? session.id), system: context.system, messages: boundImages(unsupportedParts(context.messages, resolved.capabilities)), tools: Array.from(hooked, ([name, tool]) => ({ ...tool, name })),