bodies.md: uplink to studio caste-index.md

Adds a cross-ref entry pointing at the new caste-renaming working-doc
in the closed studio repo. The §The body-caste gradient tier-names
(Deva/Asura/Manusya/Tiryak/Preta) will eventually be replaced via
in-fiction coinage tracked in caste-index.md and its per-caste split-outs.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

identity-and-personhood/bodies.md

@@ -637,6 +637,7 @@ Connects to the existing key-move in [`../architecture-index.md`](../architectur
 | `studio.nimmerworld.eachpath.local/bodies/base/robot/README.md` *(closed studio repo)* | Tech-spec scaffold for the robot base mesh (chassis-only, frame-as-mesh discipline; serves slum-tiryak + preta-overseer tiers; joint-design carries the visible-mechanism tier-language) |
 | `studio.nimmerworld.eachpath.local/bodies/base/imperial/README.md` *(closed studio repo)* | Tech-spec scaffold for the imperial base mesh (skin-over-skeleton with hidden mods; serves asura-priest + deva-pinnacle tiers; deva is no-visible-joints absolute upper limit) |
 | `studio.nimmerworld.eachpath.local/bodies/base/human/README.md` *(closed studio repo)* | Tech-spec scaffold for the human base mesh (trait-grown body that manifests in the in-between dimension during clasp-pair encounters; the truth-register body distinct from chassis) |
+| `studio.nimmerworld.eachpath.local/imperial-cult/caste-index.md` *(closed studio repo)* | Caste-renaming working-doc — the current Deva/Asura/Manusya/Tiryak/Preta vocabulary borrows from a living religious tradition (Hindu/Buddhist rebirth-wheel) and is incompatible with nimmerworld's otherwise self-generated coinage discipline; the rename-pass will eventually replace §The body-caste gradient's tier-names with in-fiction coinage that sits alongside the Hellenic trait-palette and imperial-tongue alphabet |
 
 ## Open questions