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+# LAC — Lo Audio Codec
+
+LAC is a lossless audio codec: integer-only, bit-exact, streaming-oriented.
+Designed for real-time voice (QUIC / MCU conferencing) and offline file
+compression. Compression is FLAC-class on speech (0.96-0.99× FLAC size)
+and within 5-7% of FLAC on music, while meeting realtime deadlines with
+hundreds of times' headroom on every platform tested (x86-64, aarch64,
+riscv64).
+
+## Install
+
+```toml
+# Cargo.toml
+[dependencies]
+lac = "0.1"
+```
+
+Rust 1.87+. `no_std` with `alloc`.
+
+## Minimal example
+
+```rust
+use lac::{encode_frame, decode_frame};
+
+let samples: Vec<i32> = /* signed integer PCM, |s| ≤ 2²³ − 1 */ Vec::new();
+let bytes = encode_frame(&samples);
+let recovered = decode_frame(&bytes)?;
+assert_eq!(recovered, samples);
+# Ok::<(), lac::DecodeError>(())
+```
+
+Full API reference at [docs.rs/lac](https://docs.rs/lac). Buffer-reusing
+(`encode_frame_into` / `decode_frame_into`), MCU fanout patterns, and
+packet-loss concealment strategies are all in the repository's README.
+
+## Wiki contents
+
+- **[Specification](Specification)** — the normative wire format. This is
+  the authority on byte layout, field semantics, and encoder/decoder
+  constraints. Second-team implementations should work from here.
+- **[Security Policy](Security-Policy)** — vulnerability reporting,
+  supported versions, disclosure timeline.
+
+## Project links
+
+- **Repository**: [git.lo.sh/lo/lac](https://git.lo.sh/lo/lac)
+- **Crate**: [crates.io/crates/lac](https://crates.io/crates/lac)
+- **API docs**: [docs.rs/lac](https://docs.rs/lac)
+- **License**: AGPL-3.0-only
+
+## Status
+
+Pre-1.0 (0.1.x). Wire format is stable — frames encoded by 0.1.0 will
+decode correctly on any future version with sync word `0x1ACC`. Public
+API may still change; all changes follow semver within the 0.x range.