internal/wgsync: x/crypto/ssh client with ssh.FixedHostKey pin (no insecure
fallback), forced-command exec, ok/applied response contract; Reconciler pushes
the FULL peer list on Trigger or 5-min tick (drift repair by construction).
internal/api/wg.go: PUT/GET /admin/wg/endpoint + POST/DELETE/GET /admin/wg/peers,
global-key-only, pubkey in body (base64 vs URL), sync ok|deferred|disabled.
main.go: WG_ENDPOINT_SSH_* env wiring, disabled-with-INFO when unconfigured.
Groups B/C/D tests incl. in-process SSH server; red-proofs b/c/d run + reverted.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PSK5g6qYLknKj8u3QAFEr6
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