fix(bin): point seeded remote secondmate charter at its host-local steering inbox

bin/fm-remote-home-seed.sh

@@ -22,6 +22,7 @@
 #
 # Known provisioning failure rolls the registry back. SSH status 255 preserves
 # the route and any newly scaffolded brief because completion is unknown and a same-route rerun converges.
+# The remote charter copy replaces the parent's local parent-channel and steering-inbox paths with the remote home paths the route actually uses.
 set -eu
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
@@ -147,11 +148,18 @@ REG_EXISTED=0
 [ -f "$REG" ] && { cp "$REG" "$TMP/registry.before"; REG_EXISTED=1; }
 
 # Keep the parent charter as its durable source, but publish a remote copy whose
-# status path is the remote append-only relay log rather than a local Mac path.
+# parent-channel and steering-inbox paths are remote-home paths rather than local
+# parent-home paths. The steering-inbox path below has to stay the exact inbox
+# bin/fm-remote-secondmate-control.sh's cmd_send writes records into and rings
+# the doorbell for (its CONTROL_STATE); a charter naming any other path leaves
+# the mate reading an inbox nothing delivers to.
 PARENT_STATUS="$STATE/$ID.status"
 REMOTE_STATUS="$REMOTE_HOME/state/parent-replies.status"
+PARENT_INBOX="$STATE/$ID.inbox"
+REMOTE_INBOX="$REMOTE_HOME/state/parent-route/$ID.inbox"
 while IFS= read -r line || [ -n "$line" ]; do
-  printf '%s\n' "${line//"$PARENT_STATUS"/"$REMOTE_STATUS"}"
+  line=${line//"$PARENT_STATUS"/"$REMOTE_STATUS"}
+  printf '%s\n' "${line//"$PARENT_INBOX"/"$REMOTE_INBOX"}"
 done < "$BRIEF" > "$TMP/charter.remote"
 
 PROJECTS_CSV=

docs/remote-secondmates.md

@@ -179,7 +179,8 @@ FM_HOME=<primary-home> bin/fm-send.sh fm-<id> '<request>'
 ```
 
 The [`fm-send.sh` header](../bin/fm-send.sh) owns the exact delivery-status contract.
-A routed request is delivered as a durable record in the remote home's steering inbox plus a best-effort doorbell, never by typing the payload into the pane; exit 0 means the record durably exists.
+A routed request is delivered as a durable record in the remote home's `state/parent-route/<id>.inbox` steering inbox plus a best-effort doorbell, never by typing the payload into the pane; exit 0 means the record durably exists.
+The seeded remote charter names that same host-local inbox, so the mate acts on the record the doorbell rang for instead of an unreachable inbox path in the parent's home; re-running `fm-remote-home-seed.sh` republishes that charter into an existing home.
 Every remote transport attempt is bounded by `FM_SEND_REMOTE_BUDGET`; that header owns the setting's default and validation contract.
 An unconfirmed SSH transport (exit 255) is retried identically once, while a budget expiry is not retried because completion is unknown; either outcome preserves this ordinary reply-bearing request's pending-reply expectation for the record that may have landed.
 If delivery remains unconfirmed, only the exact `FM_PENDING_REPLY_EXISTING_CORR=<id>` resend command printed by `fm-send` is safe to run later because it preserves the request body and lets the remote enqueue deduplicate onto the same record; a plain rerun mints a different correlation and is not idempotent.

tests/fm-remote-secondmate-lifecycle-e2e.test.sh

@@ -659,6 +659,23 @@ assert_present "$REMOTE_HOME/.fm-secondmate-home" "remote provisioning did not p
 assert_present "$REMOTE_HOME/projects/alpha/.git" "remote provisioning did not clone the project on that host"
 assert_grep "$REMOTE_HOME/state/parent-replies.status" "$REMOTE_HOME/data/charter.md" "remote charter did not use its append-only reply log"
 assert_no_grep "$PARENT/state/ios.status" "$REMOTE_HOME/data/charter.md" "remote charter retained the inaccessible local status path"
+assert_grep "$REMOTE_HOME/state/parent-route/ios.inbox" "$REMOTE_HOME/data/charter.md" "remote charter did not use its host-local steering inbox"
+assert_no_grep "$PARENT/state/ios.inbox" "$REMOTE_HOME/data/charter.md" "remote charter retained the inaccessible local steering inbox"
+# A home seeded before the charter carried its host-local steering inbox is
+# corrected by reseeding the same route, not by patching the home.
+remote_inbox_line=$(grep -F "$REMOTE_HOME/state/parent-route/ios.inbox" "$REMOTE_HOME/data/charter.md" | head -n 1)
+old_inbox_line=${remote_inbox_line//"$REMOTE_HOME/state/parent-route/ios.inbox"/"$PARENT/state/ios.inbox"}
+while IFS= read -r line || [ -n "$line" ]; do
+  printf '%s\n' "${line//"$REMOTE_HOME/state/parent-route/ios.inbox"/"$PARENT/state/ios.inbox"}"
+done < "$REMOTE_HOME/data/charter.md" > "$TMP_ROOT/charter.old-seed"
+cp "$TMP_ROOT/charter.old-seed" "$REMOTE_HOME/data/charter.md"
+assert_grep "$old_inbox_line" "$REMOTE_HOME/data/charter.md" "the old-seed fixture did not restore the parent steering inbox"
+FM_SECONDMATE_CHARTER='Own iOS delivery on the build Mac.' \
+  FM_SECONDMATE_SCOPE='iOS implementation and Xcode validation' \
+  remote_env "$ROOT/bin/fm-remote-home-seed.sh" ios remote-mac "$REMOTE_ROOT" "$REMOTE_HOME" alpha >/dev/null \
+  || fail "reseeding the existing remote route failed"
+assert_grep "$remote_inbox_line" "$REMOTE_HOME/data/charter.md" "reseeding did not republish the host-local steering inbox"
+assert_no_grep "$PARENT/state/ios.inbox" "$REMOTE_HOME/data/charter.md" "reseeding kept the old charter's inaccessible steering inbox"
 if FM_SECONDMATE_CHARTER='Own iOS delivery on the build Mac.' \
   FM_SECONDMATE_SCOPE='iOS implementation and Xcode validation' \
   remote_env "$ROOT/bin/fm-remote-home-seed.sh" ios remote-mac "$REMOTE_ROOT" "$TMP_ROOT/other-home" alpha \