tweak: adjust order of system prompt instructions: Global, Project, Skills (#24974)

packages/opencode/src/session/prompt.ts

@@ -1445,7 +1445,7 @@ NOTE: At any point in time through this workflow you should feel free to ask the
               instruction.system().pipe(Effect.orDie),
               MessageV2.toModelMessagesEffect(msgs, model),
             ])
-            const system = [...env, ...(skills ? [skills] : []), ...instructions]
+            const system = [...env, ...instructions, ...(skills ? [skills] : [])]
             const format = lastUser.format ?? { type: "text" as const }
             if (format.type === "json_schema") system.push(STRUCTURED_OUTPUT_SYSTEM_PROMPT)
             const result = yield* handle.process({