fix line-length lint in ops.md

agents/ops.md

@@ -36,11 +36,13 @@ is the #1 failure mode:
   - `nbapi summary` → counts, billable CPU-seconds, NAR output size.
   - `nbapi usage --from YYYY-MM-DD --to YYYY-MM-DD` → billable CPU over a range.
   - `nbapi builds --limit N` → recent builds (id, status, drv path, timing).
-  - `nbapi build <id>` → single build detail including `status_message` (the failure reason).
+  - `nbapi build <id>` → single build detail including `status_message`
+    (the failure reason).
 - **`nbshell '<cmd>' ['<cmd>' …]`** — run admin-shell commands in one session,
   output cleaned. Useful commands: `usage`, `settings <SETTING> --show`,
   `settings substituters --add <url>`, `ssh-keys`, `tokens`, `builds`,
-  `builds log <id>` (full build output). (`exit` is NOT valid — the session ends on its own.)
+  `builds log <id>` (full build output — the only way to see remote logs).
+  (`exit` is NOT valid — the session ends on its own.)
 - **`nb-substituters <list|add-cache|add-key|remove|remove-key|reset>`** — a
   guarded front end for cache settings that catches the path-style-URL mistake
   (see below) before it reaches the shell.
@@ -83,6 +85,7 @@ The full log lives on nixbuild's side. To retrieve it:
    output, failing test, or missing dependency.
 
 Example flow:
+
 ```bash
 nbapi builds --limit 5                 # find the failed build id
 nbapi build <id>                       # check status_message first