Symptom: a third of catalog entries (23 of 71 pinned trees scanned today) could not be
installed from the Desktop. The install path runs plugin_guard on every clone and a
caution verdict needs a confirmation; the CLI prompts, the Desktop/dashboard path
passes no decision callback, so caution became "Security scan blocked".
Root cause: admission (hermes plugins validate + catalog CI) never ran the scanner, so a
pin could be approved by a human and still trip the installer.
Fix, both halves:
- validate_plugin_dir gains a "security scan" check: dangerous fails the entry, caution
is reported as warnings so the reviewer reads the findings before merging the pin.
pinned-source-validate in plugin-catalog-ci.yml therefore runs the identical scanner.
- _install_plugin_core accepts reviewed_pin=<catalog sha>; when the checked-out revision
equals it, caution is accepted without a prompt. dangerous still blocks (a signature
added after review is what the backstop is for). Raw-URL installs, --ref overrides
and a checkout at any other revision keep the current behaviour.
Live: dashboard_install_plugin('weather') on origin/main -> BLOCKED caution; after -> ok.
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