It's born

[ncode]

Summary

Introduces the initial implementation of a pure-Zig YAML 1.2.2 library, followed by a series of performance improvements on the scanner, parser, and loader hot paths.

• Library bring-up (63fca09 it's born): full scanner / parser / composer / loader / emitter, typed-value API, structured diagnostics with byte offset + 1-based line/column, configurable schemas (failsafe / JSON / core), duplicate-key and unknown-tag policies, and safety limits across the pipeline. Vendors yaml/yaml-test-suite pinned at data-2022-01-17 and wires it into the build with zero skips enforced.
• Performance work (commits 19febaf → 151bb06):
  • 19febaf / 1063458 – initial load-path improvements
  • 7918403 – parser flow hot-path optimizations
  • b1dde13 – fuse parser limit checks into a single guard
  • ad53127 – parser & loader hot-path optimizations
  • 151bb06 – follow-up perf wins after profiling
• Docs (10b1024, e1e3d37): README updates covering status, install, quick-start, schema/limit configuration, and conformance reporting.

Requires Zig 0.16.0+ (enforced at build time).

Notable properties

• Caller-allocated, leak-free; every owning type has deinit and allocation failure is propagated.
• Memory-safe on malformed input: no panics, no unreachable, no UB — limits return error.Unsupported with a diagnostic.
• Build refuses to accept new entries in tests/conformance/skips.zig against the pinned suite.