docs/fuzzing.md

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# Fuzzing

`cargo-fuzz` needs the nightly toolchain. Install it with `rustup toolchain install nightly`, then:

```shell
cargo install cargo-fuzz
cd fuzz
cargo +nightly fuzz run fuzz_parse_sql -- -max_total_time=600
```

There are two targets. `fuzz_parse_sql` parses the input with every dialect.
`fuzz_parse_roundtrip` additionally re-parses the SQL rendered by `Display` and fails when a
rendered statement no longer parses.

ClusterFuzzLite runs continuous fuzzing. Every pull request fuzzes for 10 minutes in
`code-change` mode, a daily batch job grows the shared corpus stored on the
`clusterfuzzlite` branch, and a daily prune compacts it.

Crashes land in `artifacts/<target>/` and replay with `cargo fuzz run <target> <crash-file>`.