merge: lane/daemon — velox-nmhost, systemd units, velox(1) man page

docs/agents/AGENT-DAEMON.md

@@ -43,7 +43,11 @@ Read `contracts/`, `core/include/`, `docs/`. Never write in `core/`, `gui/`, or
    output. Build this early: it is how you test the daemon before the GUI exists.
 9. **`velox-nmhost`** — 4-byte-length-prefixed stdio ⇄ Unix socket pump. **Under 300 lines,
    zero business logic**, and it must exit cleanly when Firefox closes the pipe. Install
-   manifests to all four locations listed in `docs/05` §4.
+   manifests to the three real locations in `docs/05` §4 / `docs/adr/0003` — not four:
+   spike S1 found `~/snap/firefox/common/.mozilla/native-messaging-hosts/` (the intuitive
+   "inside the snap" path) is not actually read by snap Firefox, and corrected `docs/05` §4
+   down from its original four-location list. `packaging/nativehost/README.md` has the
+   current table.
 
 ## Definition of done (M1)
 - Passes the full conformance suite as a server, over **both** transports.