zzstoatzz.io
interactive intro to open social
at-me.zzstoatzz.io
docs: add oauth authentication flow documentation
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docs/oauth.md
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docs/oauth.md
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# oauth
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at-me uses atproto oauth for authentication.
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## flow
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1. user enters handle on landing page
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2. app resolves handle → DID → authorization server via did document
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3. authorization server redirects to user's pds for consent
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4. user approves, receives redirect back with auth code
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5. app exchanges code for access token
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6. token stored in session, used for authenticated api calls
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## scopes
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```rust
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Scope::Known(KnownScope::Atproto),
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Scope::Unknown("repo:app.at-me.visit".to_string()),
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```
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the granular scope `repo:app.at-me.visit` limits write access to only guestbook records.
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## session management
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sessions use actix-web's cookie-based session middleware. authenticated agents cached in-memory by DID for performance (`AGENT_CACHE`).
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see `src/oauth.rs` for implementation.