diff --git a/.claude/.gitignore b/.claude/.gitignore
new file mode 100644
index 00000000..53ced0f0
--- /dev/null
+++ b/.claude/.gitignore
@@ -0,0 +1 @@
+/settings.local.json
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9afb6a79..d41d4980 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,21 +16,14 @@ jobs:
     name: Lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions-rs/toolchain@v1
+      - uses: actions/checkout@v6
+      - uses: dtolnay/rust-toolchain@stable
         with:
-          toolchain: stable
           components: rustfmt, clippy
       - name: Lint (clippy)
-        uses: actions-rs/cargo@v1
-        with:
-          command: clippy
-          args: --all-features --all-targets
+        run: cargo clippy --all-features --all-targets
       - name: Lint (rustfmt)
-        uses: actions-rs/cargo@v1
-        with:
-          command: xfmt
-          args: --check
+        run: cargo xfmt --check
       - name: Install cargo readme
         uses: baptiste0928/cargo-install@v1
         with:
@@ -48,26 +41,17 @@ jobs:
       matrix:
         rust-version: [1.56, stable]
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions-rs/toolchain@v1
+      - uses: actions/checkout@v6
+      - uses: dtolnay/rust-toolchain@master
         with:
           toolchain: ${{ matrix.rust-version }}
-      - uses: Swatinem/rust-cache@f8f67b7515e98e4ac991ccb5c11240861e0f712b
+      - uses: Swatinem/rust-cache@v2
       - uses: taiki-e/install-action@cargo-hack
       - uses: taiki-e/install-action@nextest
+      # Build all targets to ensure examples are built as well.
       - name: Build
-        uses: actions-rs/cargo@v1
-        with:
-          # Build all targets to ensure examples are built as well.
-          command: hack
-          args: --feature-powerset build --all-targets
+        run: cargo hack --feature-powerset build --all-targets
       - name: Test
-        uses: actions-rs/cargo@v1
-        with:
-          command: hack
-          args: --feature-powerset nextest run --all-targets
+        run: cargo hack --feature-powerset nextest run --all-targets
       - name: Run doctests
-        uses: actions-rs/cargo@v1
-        with:
-          command: hack
-          args: --feature-powerset test --doc
+        run: cargo hack --feature-powerset test --doc
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 0fb579a1..1bf8e822 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -10,19 +10,14 @@ jobs:
     name: Build and deploy documentation
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions-rs/toolchain@v1
-        with:
-          toolchain: stable
+      - uses: actions/checkout@v6
+      - uses: dtolnay/rust-toolchain@stable
       - name: Build
         env:
           # So that feature(doc_cfg) can be used.
           RUSTC_BOOTSTRAP: 1
           RUSTDOCFLAGS: --cfg doc_cfg
-        uses: actions-rs/cargo@v1
-        with:
-          command: doc
-          args: --all-features
+        run: cargo doc --all-features
       - name: Organize
         run: |
           mkdir target/gh-pages
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 744bd94a..73d457ce 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -1,6 +1,6 @@
 # adapted from https://github.com/taiki-e/cargo-hack/blob/main/.github/workflows/release.yml
 
-name: Publish releases to GitHub
+name: crates.io release
 on:
   push:
     tags:
@@ -9,19 +9,22 @@ on:
 jobs:
   create-release:
     if: github.repository_owner == 'sunshowers-code'
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
+    environment: release
+    permissions:
+      id-token: write     # Required for OIDC token exchange.
+      contents: write     # Required for creating releases.
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
+      - uses: rust-lang/crates-io-auth-action@v1
+        id: auth
       - name: Install Rust
-        uses: actions-rs/toolchain@v1
-        with:
-          toolchain: stable
-          override: true
+        uses: dtolnay/rust-toolchain@stable
       - run: cargo publish
         env:
-          CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}
+          CARGO_REGISTRY_TOKEN: ${{ steps.auth.outputs.token }}
       - uses: taiki-e/create-gh-release-action@v1
         with:
           changelog: CHANGELOG.md
diff --git a/.gitignore b/.gitignore
index 38db1195..ebdff5af 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,8 +1,3 @@
-# will have compiled files and executables
-/target/
-
-# These are backup files generated by rustfmt
+/target
 **/*.rs.bk
-
-# IntelliJ settings
 /.idea
diff --git a/Cargo.toml b/Cargo.toml
index 436dc70e..f5231ff2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -50,6 +50,12 @@ tokio1 = ["futures03", "tokio"]
 quickcheck1 = ["quickcheck", "rand"]
 proptest1 = ["proptest"]
 
+[lints.clippy]
+test_attr_in_doctest = "allow"
+
+[lints.rust]
+unexpected_cfgs = { level = "warn", check-cfg = ['cfg(doc_cfg)'] }
+
 [package.metadata.docs.rs]
 all-features = true
 rustdoc-args = ["--cfg", "doc_cfg"]