Rename a resumed session's husk with an 'X ' prefix

README.md

@@ -62,6 +62,12 @@ runs `claude stop <old id>` after a successful resume. Without that the husk
 would be picked up again on a later tick and resumed into a *second* session
 working the same conversation — two agents racing on the same git worktree.
 
+A stopped husk is still listed, under the same name as the successor that
+replaced it, which is confusing to work next to. So the watchdog also prefixes
+it — `X rewrite larvitsmpp typescript esm` — by rewriting `name` in the husk's
+`state.json`, which is where `claude agents` reads it and which no command sets.
+`--superseded-prefix` changes it.
+
 ### Host headroom
 
 A resume starts a fresh process that reloads a whole conversation, so before
@@ -190,6 +196,7 @@ hardcoded. To make one permanent, add it to the crontab line.
 | `--max-swap-used-pct` | `WATCHDOG_MAX_SWAP_USED_PCT` | `50`         |
 | `--min-available-mb`  | `WATCHDOG_MIN_AVAILABLE_MB`  | `2048`       |
 | `--prompt`            | `WATCHDOG_PROMPT`            | see `--help` |
+| `--superseded-prefix` | `WATCHDOG_SUPERSEDED_PREFIX` | `X `         |
 | `--dry-run`           | —                            | off          |
 
 ## Files