Function applyMigration

src/commands/migrate.ts:355–396

(entries: MigrationEntry[])

 * Returns the new entries plus the entries that were skipped (with a reason).
 */
export function applyMigration(entries: MigrationEntry[]): MigrationResult {
  const filePath = path.join(getConfigDir(), "settings.json");
  const existing = readJson(filePath) ?? {};
  const servers = isPlainObject(existing.mcpServers)
    ? { ...(existing.mcpServers as Record<string, McpServerConfig>) }
    : {};

  const added: MigrationEntry[] = [];
  const skipped: { entry: MigrationEntry; reason: string }[] = [];

  for (const entry of entries) {
    if (entry.name in servers) {
      skipped.push({
        entry,
        reason: "already exists in ~/.orbcode/settings.json",
      });
      continue;
    }
    if (destinationHas(entry.name)) {
      // Race-safe double-check: the in-memory snapshot is the source of
      // truth at write time, so if it changed between our read and now
      // we still skip.
      skipped.push({
        entry,
        reason: "already exists in ~/.orbcode/settings.json",
      });
      continue;
    }
    servers[entry.name] = entry.config;
    added.push(entry);
  }

  if (added.length > 0) {
    existing.mcpServers = servers;
    fs.mkdirSync(path.dirname(filePath), { recursive: true });
    fs.writeFileSync(filePath, JSON.stringify(existing, null, "\t") + "\n", {
      mode: 0o600,
    });
  }

  return { added, skipped };
}