Builds on memosr's sink-level opt-in gate (#29249). Enabling a
non-bundled plugin now surfaces the privileged allow_tool_override
decision at `hermes plugins enable` time instead of leaving the
operator to discover the config key after a runtime rejection.
- `hermes plugins enable <name>` prompts for non-bundled plugins:
'Allow this plugin to replace built-in tools?' Default is deny
(blank Enter / non-interactive stdin / EOF all fail closed).
- --allow-tool-override / --no-allow-tool-override flags for
non-interactive and scripted use (and a future desktop checkbox).
- Bundled plugins are trusted: never prompted, no entry written.
- Writes plugins.entries.<key>.allow_tool_override, the same key the
sink gate reads (manifest.key == discovery key), so consent and
enforcement compose end to end.
#41076 makes `hermes plugins list` discover nested category plugins (e.g.
observability/nemo_relay). This adds the missing enable/disable mutation path
so those plugins can actually be toggled, and fixes two incomplete-update
breakages on the #41076 base.
Before: `hermes plugins enable nemo_relay` -> "Plugin 'nemo_relay' is not
installed or bundled." (exit 1), because cmd_enable/cmd_disable went through
_plugin_exists(), which only checked top-level plugins/<name>/.
Changes:
- Add _resolve_plugin_key(): resolve a bare manifest/leaf name OR a full
path-derived key (observability/nemo_relay) to the canonical key the runtime
loader gates on, reusing #41076's _discover_all_plugins(). A bare leaf name
ambiguous across two categories resolves to None rather than silently picking
one.
- cmd_enable/cmd_disable resolve first, persist the canonical key, and drop any
stale legacy bare-name alias so the enabled/disabled lists can't drift into a
contradictory state. _plugin_exists delegates to the same resolver.
- Fix#41076 base breakages: _discover_all_plugins now returns 6-tuples, but
web_server._merged_plugins_hub() still unpacked 5 (ValueError on the
dashboard plugins-hub endpoint) and several test_plugins_cmd_list.py fixtures
were still 5-tuples. Both updated; the hub status check is now key-aware.
Verified e2e on the real CLI + runtime loader (isolated HERMES_HOME):
`hermes plugins enable nemo_relay` writes observability/nemo_relay to
config.yaml and the loader then loads it (enabled=True, error=None); a stale
bare-name alias is cleared on disable; the dashboard _merged_plugins_hub() runs
without crashing. Adds resolution + enable/disable tests; full
tests/hermes_cli/test_plugins_cmd* + web_server plugin tests green.
Follow-up to #41076 (#41066). Branched from that PR's head.
