zzstoatzz.io
atproto tools in zig
zat.dev
sdk
atproto
zig
add changelog for 0.1.0 release
documents new sync types, migration guide, and library overview.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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CHANGELOG.md
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CHANGELOG.md
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# changelog
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## 0.1.0
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first feature release. adds protocol-level enums for firehose consumption.
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### what's new
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**sync types** - enums from `com.atproto.sync.subscribeRepos` lexicon:
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- `CommitAction` - `.create`, `.update`, `.delete`
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- `EventKind` - `.commit`, `.sync`, `.identity`, `.account`, `.info`
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- `AccountStatus` - `.takendown`, `.suspended`, `.deleted`, `.deactivated`, `.desynchronized`, `.throttled`
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these integrate with zig's `std.json` for automatic parsing. define struct fields as enums instead of strings, and get exhaustive switch checking.
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### migration
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if you're currently doing string comparisons:
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```zig
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// before: string comparisons everywhere
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const TapRecord = struct {
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action: []const u8,
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collection: []const u8,
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// ...
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};
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if (mem.eql(u8, rec.action, "create") or mem.eql(u8, rec.action, "update")) {
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// handle upsert
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} else if (mem.eql(u8, rec.action, "delete")) {
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// handle delete
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}
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```
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switch to enum fields:
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```zig
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// after: type-safe enums
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const TapRecord = struct {
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action: zat.CommitAction, // parsed automatically by std.json
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collection: []const u8,
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// ...
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};
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switch (rec.action) {
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.create, .update => processUpsert(rec),
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.delete => processDelete(rec),
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}
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```
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the compiler enforces exhaustive handling - if AT Protocol adds a new action, your code won't compile until you handle it.
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**this is backwards compatible.** your existing code continues to work. adopt the new types when you're ready.
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### library overview
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zat provides zig primitives for AT Protocol:
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| feature | description |
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|---------|-------------|
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| string primitives | `Tid`, `Did`, `Handle`, `Nsid`, `Rkey`, `AtUri` - parsing and validation |
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| did resolution | resolve `did:plc` and `did:web` to documents |
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| handle resolution | resolve handles to DIDs via HTTP well-known |
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| xrpc client | call AT Protocol endpoints (queries and procedures) |
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| sync types | enums for firehose consumption |
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| json helpers | navigate nested json without verbose if-chains |
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| jwt verification | verify service auth tokens (ES256, ES256K) |
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| multibase/multicodec | decode public keys from DID documents |
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### install
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```bash
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zig fetch --save https://tangled.sh/zzstoatzz.io/zat/archive/main
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```
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```zig
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// build.zig
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const zat = b.dependency("zat", .{}).module("zat");
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exe.root_module.addImport("zat", zat);
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```
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## 0.0.2
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- xrpc client with gzip workaround for zig 0.15.x deflate bug
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- jwt parsing and verification
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## 0.0.1
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- initial release
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- string primitives (Tid, Did, Handle, Nsid, Rkey, AtUri)
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- did/handle resolution
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- json helpers