logfire client for zig
update readme with instrumentation helpers and batch export
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README.md
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README.md
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## Features
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- **Spans** - timing and tracing with attributes, automatic parent-child linking
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- **Instrumentation helpers** - `httpSpan()` and `sqlSpan()` for common patterns
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- **Async batched export** - BatchSpanProcessor exports every 500ms (matches Python/Rust)
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- **Logging** - trace, debug, info, warn, err (console output)
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- **OTLP Export** - HTTP/protobuf via otel-zig to Logfire or any OTLP-compatible backend
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- **Zero Config** - reads token and endpoint from environment
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// add attributes after creation
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span.setAttribute("result_count", @as(i64, 42));
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// record errors (sets error status + adds exception event)
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span.recordError(error.ConnectionFailed);
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// instrumentation helpers for common patterns
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const http_span = logfire.httpSpan("GET", "/api/users", .{});
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defer http_span.end();
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// creates span named "HTTP GET /api/users" with http.request.method and url.path attrs
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const db_span = logfire.sqlSpan("SELECT * FROM users WHERE id = ?", "postgresql");
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defer db_span.end();
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// creates span with truncated SQL name and db.system attribute
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// logging (console output only for now)
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logfire.trace("detailed trace", .{});
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logfire.debug("debug info", .{});
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- [x] Spans with attributes
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- [x] Parent-child span linking (thread-local context)
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- [x] Error recording (`span.recordError()`)
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- [x] OTLP HTTP/protobuf export
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- [x] Async batched export (500ms interval, matches Python/Rust)
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- [x] Environment-based configuration
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- [x] Instrumentation helpers (`httpSpan`, `sqlSpan`)
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- [x] Cross-platform (macOS + Linux)
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- [ ] Structured logging export (console only, OTLP TODO)
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- [ ] Metrics (API stubs, implementation TODO)