feat: initial pitch

README.md

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+# Solid Gate
+
+> Your Solid pod, with an API surface you define.
+
+## What is this?
+
+[Solid](https://solidproject.org/) is great for storing your personal RDF data in a pod you control. The problem: every app that wants to read your data needs to speak LDP, understand your specific vocabularies, and parse RDF. Almost none do.
+
+Solid Gate is the adapter layer. Define a mapping template once, and your pod data is exposed as whatever format a consuming app actually wants — RSS, iCal, JSON, a REST endpoint, anything.
+
+Think of it as [SPARQL-Anything](https://sparql-anything.cc/) in reverse: SPARQL-Anything lets you query arbitrary formats *as if* they were RDF. Solid Gate lets you serve your RDF *as if* it were any arbitrary format.
+
+## How it works
+
+1. **Authenticate** — grant Solid Gate read access to your pod via Solid OIDC
+2. **Deploy a template** — pick one from the library or write your own
+3. **Get a stable URL** — your transformed data is cached and served at a permanent endpoint
+4. **Stays fresh** — [Solid Notifications](https://solid.github.io/notifications/protocol) trigger recomputation when your pod data changes; stale cache is served in between
+
+```
+Your Solid Pod  →  Solid Gate  →  stable URL (RSS / iCal / JSON / ...)
+                       ↑
+             mapping template
+            (yours or community)
+```
+
+## Example use cases
+
+- **Bookmarks → RSS** — publish a "what I'm reading" feed from your pod bookmarks
+- **Events → iCal** — expose your RDF event data to any calendar app
+- **Contacts → vCard** — bridge your pod contacts to legacy address book apps
+- **Any RDF → REST API** — give legacy apps a familiar interface to your pod data
+
+## Deployment
+
+### Self-hosted
+
+Coming soon.
+
+### Hosted
+
+Coming soon. Authenticate with your Solid identity, deploy a template, done.
+
+## Status
+
+Early design phase. Part of the [Aleph Garden](https://aph.gdn) personal semantic web project.
+
+## Related
+
+- [Solid Project](https://solidproject.org/)
+- [SPARQL-Anything](https://sparql-anything.cc/) — the spiritual mirror of this project