Refactor app context system to use Zod schemas and sync access pattern

🤖 Generated with opencode
Co-Authored-By: opencode <noreply@opencode.ai>

packages/opencode/src/session/context.ts

@@ -0,0 +1,29 @@
+import { App } from "../app/app"
+import path from "path"
+
+export namespace SessionContext {
+  const FILES = [
+    "AGENTS.md",
+    "CLAUDE.md",
+    "CONTEXT.md", // deprecated
+  ]
+  export async function find() {
+    const { cwd, root } = App.info().path
+    let current = cwd
+    const found = []
+    while (true) {
+      for (const item of FILES) {
+        const file = Bun.file(path.join(current, item))
+        if (await file.exists()) {
+          found.push(file.text())
+        }
+      }
+
+      if (current === root) break
+      const parent = path.dirname(current)
+      if (parent === current) break
+      current = parent
+    }
+    return Promise.all(found).then((parts) => parts.join("\n\n"))
+  }
+}