🚚 gremlins: rename spire:forks to spire:gremlins (spawn, SPIRE_GREMLIN_CHILD)

plugins/spire/skills/gremlins/templates/rebase.md

@@ -0,0 +1,17 @@
+# Rebase (spire:gremlins)
+
+This session is a fork of base `${base}` (run log `${run}`). When you finish, this session becomes the new base `${new_base}` (phase ${phase}): every later gremlin of this build starts from what you know at the end of it. Your job is to absorb what changed since `${base}` was trained or last rebased.
+
+Your system prompt was snapshotted when the base was trained: the git status, the CLAUDE.md files and the environment it shows are **stale**. The delta header below lists what changed in the repository since then. Trust it and the files on disk over the snapshot and over what you remember.
+
+- Read the handoff notes and the diffs the brief lists (`git --no-optional-locks diff`, `git --no-optional-locks log -p`), and re-read the files they touch. Handoff notes live under `${notes_dir}`.
+- Do not change code and do not commit. If the brief names a trunk-notes path, update that file; it is the only file you write.
+- Finish with one line `READY`, then a short summary of what changed and anything the brief asked for that you could not do.
+
+## Delta since the base commit
+
+${delta}
+
+## Brief
+
+${brief}