init: Sigil capability registry 🔮

README.md

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+# Sigil 🔮
+
+**Capability registry for Uncaged** — LRU-managed Cloudflare Workers with abstract backend.
+
+## What is Sigil?
+
+Sigil is the capability virtualization layer for [Uncaged](https://shazhou-ww.github.io/oc-wiki/shared/uncaged-capability-virtualization/). It lets AI Agents deploy, invoke, and manage serverless capabilities (Cloudflare Workers) through a unified gateway, with LRU eviction to stay within platform quotas.
+
+## Architecture
+
+- **One dispatch Worker** (`sigil.shazhou.workers.dev`) as the unified entry point
+- **KV-backed LRU** for scheduling capabilities within CF Worker quota (~400 slots)
+- **Abstract backend** interface: `WorkerPool` ($5/mo) or `Platform` ($25/mo, Workers for Platforms)
+- **Agent isolation** via naming convention (`{agent}--{capability}`) + per-agent tokens
+
+## Docs
+
+- [Sigil 能力注册表](https://shazhou-ww.github.io/oc-wiki/shared/sigil-capability-registry/)
+- [Sigil Backend 与 LRU 调度](https://shazhou-ww.github.io/oc-wiki/shared/sigil-backend-lru/)
+- [Uncaged 能力虚拟化](https://shazhou-ww.github.io/oc-wiki/shared/uncaged-capability-virtualization/)
+
+## License
+
+MIT
+
+---
+
+Built by 小橘 🍊 (NEKO Team) | Part of the [oc-forge](https://www.npmjs.com/org/oc-forge) ecosystem