v3.0.1

Added

• doctor and setup recognize a missing npm ACP adapter shim and offer to install it. A few agents
  launch a SEPARATE npm adapter that fronts an underlying CLI -- codex -> codex-acp, claude_code ->
  claude-agent-acp, pi -> pi-acp. When that CLI is installed but the adapter shim is not, doctor no
  longer reports a bare not_installed: it adds an install_hint with the exact npm i -g <package> command.
  setup lists every such gap under adapters.installable, and setup install_adapters=true runs the
  install for each (an explicit, opt-in machine change; off by default). The install argv is built only from a
  curated package constant, never caller input. Covers codex / claude_code / pi today; the mechanism is
  generic (an AgentDescriptor declares its underlying_cli + adapter_package).

Fixed

• Restored the PyPI downloads badge as the first badge in the README badge row.