diff --git a/.github/workflows/build-test.yml b/.github/workflows/build-test.yml
index 19e82519f..cf02ecac6 100644
--- a/.github/workflows/build-test.yml
+++ b/.github/workflows/build-test.yml
@@ -288,7 +288,7 @@ jobs:
         uses: dtolnay/rust-toolchain
         with:
             components: rustfmt, clippy
-      
+
       - name: fmt
         run: |
             cargo fmt --all -- --files-with-diff --check
@@ -302,7 +302,7 @@ jobs:
       - uses: dtolnay/rust-toolchain
         with:
           components: clippy
-        
+
       - name: workspace
         run: |
             cargo clippy --workspace --all-features -- -Dwarnings
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 000000000..344d98626
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,52 @@
+# See https://pre-commit.com for more information
+# See https://pre-commit.com/hooks.html for more hooks
+repos:
+-   repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v3.2.0
+    hooks:
+    -   id: trailing-whitespace
+    -   id: check-yaml
+    -   id: check-added-large-files
+-   repo: local
+    hooks:
+      - id: fmt
+        name: fmt
+        description: run cargo fmt on the workspace
+        entry: cargo fmt --all -- --color always
+        language: system
+        pass_filenames: false
+      - id: clippy
+        name: clippy
+        description: run cargo clippy on the workspace
+        stages: [pre-push]
+        entry: cargo clippy --workspace --all-features -- -Dwarnings
+        language: system
+        pass_filenames: false
+      - id: build
+        name: build
+        description: run cargo build on the workspace
+        stages: [pre-push]
+        entry: cargo build --all-features --workspace
+        language: system
+        pass_filenames: false
+      - id: benchmarks
+        name: build benchmarks
+        description: run cargo bench on the workspace
+        stages: [pre-push]
+        entry: cargo bench --no-run --workspace
+        language: system
+        pass_filenames: false
+      - id: tests
+        name: run tests
+        description: run cargo test on the workspace
+        stages: [pre-push]
+        entry: cargo test --workspace
+        language: system
+        pass_filenames: false
+      - id: wheel
+        name: build wheel
+        description: run maturin develop on the wheel
+        stages: [pre-push]
+        entry: sh -c "cd wheel && maturin develop"
+        language: system
+        pass_filenames: false
diff --git a/README.md b/README.md
index 4484bc5be..70e2ece6f 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,102 @@
 This cargo workspace contains code useful for working with the Chia network.
 
-It contains a rust crate `chia` (here), a python wheel api `chia_rs` (in `wheel`), and web assembly (in `wasm`).
+# Tests
+
+To run tests:
+
+```
+cargo test --all
+```
+
+Some slow tests are only enabled in optimized builds, so it may also be a good
+idea to run the tests in release mode:
+
+```
+cargo test --all --release
+```
+
+You may need a python virtual environment activated for the tests to link.
+This seems to be caused by the pyo3 dependency in the `wheel`.
+
+# Benchmarks
+
+To run benchmarks for a specific crate:
+
+```
+cargo bench -- --save-baseline before
+<make change>
+cargo bench -- --save-baseline after
+critcmp after before
+```
+
+You can also run all the benchmarks by including `--workspace` on the command
+line.
+
+# pre-commit
+
+This repository has a pre-commit configuration, which is hooked into git by
+running:
+
+```
+pre-commit install --hook-type pre-commit --hook-type pre-push
+```
+
+It runs `cargo fmt` on all crates on every commit, and runs clippy and builds on
+push.
+
+To run all checks explicitly (without pushing), run:
+
+```
+pre-commit run --all --hook-stage pre-push
+```
+
+# python bindings
+
+The `wheel` crate is a single python wheel that exports the functionality of
+all crates in the repository.
+
+It's built with `maturin`. You need to have activated a python virtual
+environment for the build to work.
+
+```
+pip install maturin
+cd wheel
+maturin develop
+```
+
+Once built, the python tests can be run, from the root of the repository. Note
+that the tests require that `chia-blockchain` and `blspy` wheels are installed.
+
+```
+pytest tests
+```
+
+# Fuzzers
+
+Fuzzers can't be run or listed for the whole workspace, but only for individual
+crates. There is a tool to generate a fuzzing corpus from a blockchain database.
+It's run like this:
+
+```
+cd chia-tools
+cargo run --release --bin gen-corpus -- --help
+```
+
+The following crates have fuzzers:
+
+* chia-bls
+* chia-protocol
+* chia-wallet
+* clvm-utils
+* chia (the root crate)
+
+To list and run fuzzers:
+
+```
+cargo fuzz list
+```
+
+```
+cargo fuzz run <name-of-fuzzer>
+```
 
diff --git a/src/gen/test_generators.rs b/src/gen/test_generators.rs
index f42c5b00e..2a3986c5f 100644
--- a/src/gen/test_generators.rs
+++ b/src/gen/test_generators.rs
@@ -6,7 +6,6 @@ use chia_protocol::{Bytes, Bytes48};
 use clvmr::allocator::NodePtr;
 use clvmr::Allocator;
 use std::iter::zip;
-use std::string::String;
 use text_diff::diff;
 use text_diff::Difference;