diff --git a/packages/opencode/src/session/system.ts b/packages/opencode/src/session/system.ts
index 4dc227656..7d7603b22 100644
--- a/packages/opencode/src/session/system.ts
+++ b/packages/opencode/src/session/system.ts
@@ -55,8 +55,13 @@ export namespace SystemPrompt {
     const config = await Config.get()
     const found = []
     for (const item of CUSTOM_FILES) {
-      const matches = await Filesystem.findUp(item, cwd, root)
-      found.push(...matches.map((x) => Bun.file(x).text()))
+      // Search upward from current directory
+      const upMatches = await Filesystem.findUp(item, cwd, root)
+      found.push(...upMatches.map((x) => Bun.file(x).text()))
+      
+      // Search downward from current directory (limited depth to avoid performance issues)
+      const downMatches = await Filesystem.findDown(item, cwd, 3)
+      found.push(...downMatches.map((x) => Bun.file(x).text()))
     }
     found.push(
       Bun.file(path.join(Global.Path.config, "AGENTS.md"))
diff --git a/packages/opencode/src/util/filesystem.ts b/packages/opencode/src/util/filesystem.ts
index d5149cf39..4fe069b59 100644
--- a/packages/opencode/src/util/filesystem.ts
+++ b/packages/opencode/src/util/filesystem.ts
@@ -64,4 +64,25 @@ export namespace Filesystem {
     }
     return result
   }
+
+  export async function findDown(target: string, start: string, maxDepth: number = 3) {
+    const result = []
+    const glob = new Bun.Glob(`**/${target}`)
+    try {
+      for await (const match of glob.scan({
+        cwd: start,
+        onlyFiles: true,
+        dot: true,
+      })) {
+        const fullPath = join(start, match)
+        const depth = match.split('/').length - 1
+        if (depth <= maxDepth) {
+          result.push(fullPath)
+        }
+      }
+    } catch {
+      // Skip if glob fails
+    }
+    return result
+  }
 }