fix: avoid stale system prompt instance context

Author: kitlangton

packages/opencode/src/session/system.ts

@@ -1,6 +1,6 @@
 import { Context, Effect, Layer } from "effect"
 
-import { InstanceState } from "@/effect"
+import { Instance } from "../project/instance"
 
 import PROMPT_ANTHROPIC from "./prompt/anthropic.txt"
 import PROMPT_DEFAULT from "./prompt/default.txt"
@@ -43,18 +43,18 @@ export const layer = Layer.effect(
   Service,
   Effect.gen(function* () {
     const skill = yield* Skill.Service
-    const ctx = yield* InstanceState.context
 
     return Service.of({
       environment(model) {
+        const project = Instance.project
         return [
           [
             `You are powered by the model named ${model.api.id}. The exact model ID is ${model.providerID}/${model.api.id}`,
             `Here is some useful information about the environment you are running in:`,
             `<env>`,
-            `  Working directory: ${ctx.directory}`,
-            `  Workspace root folder: ${ctx.worktree}`,
-            `  Is directory a git repo: ${ctx.project.vcs === "git" ? "yes" : "no"}`,
+            `  Working directory: ${Instance.directory}`,
+            `  Workspace root folder: ${Instance.worktree}`,
+            `  Is directory a git repo: ${project.vcs === "git" ? "yes" : "no"}`,
             `  Platform: ${process.platform}`,
             `  Today's date: ${new Date().toDateString()}`,
             `</env>`,