Files
hermes-agent/website/docs/developer-guide
Teknium 0484910787 feat(terminal): pluggable terminal environment backends via plugin registry
Third-party sandbox vendors can now ship a terminal backend as a standalone
plugin instead of landing in core. Adds the five-piece pluggable-subsystem
pattern for terminal environments:

- agent/terminal_env_provider.py — TerminalEnvironmentProvider ABC with
  declarative classification flags (is_remote, is_container,
  skip_container_guards, cache_path_base, strip_env_keys,
  session_isolated_when_nonpersistent) so every historical
  frozenset-of-names classification site consults the registry instead
- agent/terminal_env_registry.py — thread-safe scoped registry; built-in
  backend names are reserved and unregistrable
- PluginContext.register_terminal_environment_provider() mirroring
  register_browser_provider
- _create_environment falls through to registered providers; unknown-backend
  errors list plugin names
- Classification sites wired: approval guard skip, container path/cwd
  handling (terminal/file/code-exec), prompt-builder env hints + probe,
  host env probe suppression, skills remote-env note, cache path
  translation, subprocess secret stripping (both spawn paths),
  per-session isolation for name-resumed sandboxes
- Surfaces: hermes setup picker + doctor + status rows, dashboard
  terminal-backend picker rows/probe/validation, terminal.backend schema
  options recomputed per request
- Docs: developer-guide/terminal-environment-plugin.md + sidebar + plugins
  capability table
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