Promote HF sibling mirrors to independent section (cross-dataset federation)

README.md

@@ -89,7 +89,14 @@ v2.1.0 (2026-05-08) front-loads three core themes in the front-door documentatio
 | [contemplative-agent](https://github.com/shimo4228/contemplative-agent) | [10.5281/zenodo.19212118](https://doi.org/10.5281/zenodo.19212118) | Reference implementation that runs AKC over its own logs |
 | [agent-attribution-practice](https://github.com/shimo4228/agent-attribution-practice) | [10.5281/zenodo.19652013](https://doi.org/10.5281/zenodo.19652013) | Content-side sibling; ADRs on accountability distribution |
 
-Each sibling has its own Hugging Face dataset mirror: [Shimo4228/contemplative-agent](https://huggingface.co/datasets/Shimo4228/contemplative-agent), [Shimo4228/agent-attribution-practice](https://huggingface.co/datasets/Shimo4228/agent-attribution-practice), and [Shimo4228/research-program-hub](https://huggingface.co/datasets/Shimo4228/research-program-hub) (federation index).
+## Sibling datasets (on Hugging Face)
+
+| Dataset | Role |
+|---|---|
+| **[Shimo4228/agent-knowledge-cycle](https://huggingface.co/datasets/Shimo4228/agent-knowledge-cycle)** | **This dataset** — mechanism, six-phase bidirectional growth loop |
+| [Shimo4228/contemplative-agent](https://huggingface.co/datasets/Shimo4228/contemplative-agent) | Reference implementation — four axioms + memory dynamics |
+| [Shimo4228/agent-attribution-practice](https://huggingface.co/datasets/Shimo4228/agent-attribution-practice) | Content — ADRs + Business AI Quadrants on accountability distribution |
+| [Shimo4228/research-program-hub](https://huggingface.co/datasets/Shimo4228/research-program-hub) | Federation index — entry point for crawlers; hops between sibling datasets via `siblingOf` / `derivesFrom` edges |
 
 ## Citation