feat(atlassian): implement milestone M2 - jira command surface

skills/atlassian/shared/scripts/src/files.ts

@@ -0,0 +1,13 @@
+import { readFile } from "node:fs/promises";
+import path from "node:path";
+
+export async function readWorkspaceFile(filePath: string, cwd: string) {
+  const resolved = path.resolve(cwd, filePath);
+  const relative = path.relative(cwd, resolved);
+
+  if (relative.startsWith("..") || path.isAbsolute(relative)) {
+    throw new Error(`--body-file must stay within the active workspace: ${filePath}`);
+  }
+
+  return readFile(resolved, "utf8");
+}