diff --git a/.github/workflows/audit-check.yml b/.github/workflows/audit-check.yml
index 2dc757c..88b318b 100644
--- a/.github/workflows/audit-check.yml
+++ b/.github/workflows/audit-check.yml
@@ -6,7 +6,7 @@ on:
 
 jobs:
   audit-check:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     permissions:
       checks: write
       issues: write
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 40d9ac8..24db34c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,16 +5,13 @@ on:
   workflow_dispatch:
 
 env:
+  CARGO_TERM_COLOR: always
   CI: 1
 
 jobs:
   clippy:
-    name: Clippy validation${{ matrix.all-features && ' with all features' || '' }}
-    strategy:
-      fail-fast: false
-      matrix:
-        all-features: [ false ]
-    runs-on: ubuntu-latest
+    name: Clippy validation
+    runs-on: ubuntu-24.04
     steps:
       - name: Checkout code
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
@@ -27,20 +24,21 @@ jobs:
           cache: false
 
       - name: Rust Cache
-        uses: Swatinem/rust-cache@f0deed1e0edfc6a9be95417288c0e1099b1eeec3 # v2.7.7
+        uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2.7.8
         with:
-          prefix-key: v1-rust
-          key: all-features-${{ matrix.all-features }}
+          prefix-key: v2-rust
           cache-on-failure: true
 
       - name: Run clippy
         uses: clechasseur/rs-clippy-check@23f6dcf86d7e4e0d98b000bba0bb81ac587c44aa # v4.0.2
         with:
-          args: --workspace --all-targets ${{ matrix.all-features && '--all-features' || '' }} -- -D warnings
+          args: --workspace --all-targets --feature-powerset -- -D warnings
+          tool: cargo-hack
+          cache-key: v1-clippy
 
   fmt:
     name: Rustfmt check
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - name: Checkout code
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
@@ -58,18 +56,14 @@ jobs:
           args: --all
 
   build:
-    name: Build for Rust ${{ matrix.toolchain }}${{ matrix.experimental && ' (experimental)' || '' }} on ${{ matrix.os }}${{ matrix.ignore-lock && ' without Cargo.lock' || '' }}${{ matrix.all-features && ' with all features' || '' }}
+    name: Build for Rust ${{ matrix.toolchain }}${{ matrix.experimental && ' (experimental)' || '' }} on ${{ matrix.os }}${{ matrix.ignore-lock && ' without Cargo.lock' || '' }}
     strategy:
       fail-fast: false
       matrix:
-        toolchain: [ 1.75.0, stable ]
-        os: [ ubuntu ]
+        toolchain: [ 1.81.0, stable ]
+        os: [ ubuntu-24.04 ]
         ignore-lock: [ false ]
-        all-features: [ false ]
-        include:
-          - experimental: false
-    runs-on: ${{ matrix.os }}-latest
-    continue-on-error: ${{ matrix.experimental }}
+    runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout code
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
@@ -85,22 +79,21 @@ jobs:
           cache: false
 
       - name: Rust Cache
-        if: ${{ !matrix.experimental }}
-        uses: Swatinem/rust-cache@f0deed1e0edfc6a9be95417288c0e1099b1eeec3 # v2.7.7
+        uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2.7.8
         with:
-          prefix-key: v2-rust
-          key: ignore-lock-${{ matrix.ignore-lock }}-all-features-${{ matrix.all-features }}
+          prefix-key: v3-rust
+          key: ignore-lock-${{ matrix.ignore-lock }}
           cache-on-failure: true
 
-      - name: Install just
-        uses: taiki-e/install-action@3c8fc6eaa5fcff049bb133c1f540c6c2287a191f # v2.49.10
+      - name: Install required tools
+        uses: taiki-e/install-action@f1390fd0d8205ae79e5e57b1d1e300dceeb4163e # v2.49.44
         with:
-          tool: just
+          tool: just,cargo-hack
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Run checks
-        run: just all_features=${{ matrix.all-features }} check
+      - name: Run checks on feature powerset
+        run: just check-powerset
 
       - name: Run tests
-        run: just all_features=${{ matrix.all-features }} test
+        run: just test
diff --git a/.gitignore b/.gitignore
index 710a684..7c50b35 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,9 +8,6 @@ target*/
 # These are backup files generated by rustfmt
 **/*.rs.bk
 
-# Files that exist while we run `cargo minimal-versions`/`cargo msrv`
-*.msrv-prep*.bak
-
 # MSVC Windows builds of rustc generate these, which store debugging information
 *.pdb
 
@@ -21,10 +18,15 @@ target*/
 # docker-compose.override.yml is meant to be local-only
 docker-compose.override.yml
 
-# Profiling files generated by cargo-tarpaulin
+# Profiling files generated by cargo-tarpaulin and cargo-llvm-cov
 *.profraw
 cobertura.xml
 tarpaulin-report.*
+cov.json
+codecov.json
+
+# Local environment overrides
+.env
 
 # aocf input cache
 .aocf/cache
diff --git a/Cargo.lock b/Cargo.lock
index 014db5e..aae83ab 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -67,19 +67,20 @@ dependencies = [
 
 [[package]]
 name = "anstyle-wincon"
-version = "3.0.6"
+version = "3.0.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2109dbce0e72be3ec00bed26e6a7479ca384ad226efdd66db8fa2e3a38c83125"
+checksum = "ca3534e77181a9cc07539ad51f2141fe32f6c3ffd4df76db8ad92346b003ae4e"
 dependencies = [
  "anstyle",
+ "once_cell",
  "windows-sys 0.59.0",
 ]
 
 [[package]]
 name = "anyhow"
-version = "1.0.96"
+version = "1.0.97"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6b964d184e89d9b6b67dd2715bc8e74cf3107fb2b529990c90cf517326150bf4"
+checksum = "dcfed56ad506cb2c684a14971b8861fdc3baaaae314b9e5f9bb532cbe3ba7a4f"
 
 [[package]]
 name = "aocf"
@@ -117,7 +118,7 @@ version = "0.1.0"
 dependencies = [
  "aoclp",
  "bit-vec",
- "clap 4.5.31",
+ "clap 4.5.35",
  "itertools",
  "paste",
  "primes",
@@ -176,15 +177,15 @@ checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
 [[package]]
 name = "bitflags"
-version = "2.6.0"
+version = "2.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b048fb63fd8b5923fc5aa7b340d8e156aec7ec02f0c78fa8a6ddc2613f6f71de"
+checksum = "5c8214115b7bf84099f1309324e63141d4c5d7cc26862f97a0a857dbefe165bd"
 
 [[package]]
 name = "cc"
-version = "1.2.5"
+version = "1.2.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c31a0499c1dc64f458ad13872de75c0eb7e3fdb0e67964610c914b034fc5956e"
+checksum = "525046617d8376e3db1deffb079e91cef90a89fc3ca5c185bbf8c9ecdd15cd5c"
 dependencies = [
  "shlex",
 ]
@@ -214,19 +215,19 @@ dependencies = [
 
 [[package]]
 name = "clap"
-version = "4.5.31"
+version = "4.5.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "027bb0d98429ae334a8698531da7077bdf906419543a35a55c2cb1b66437d767"
+checksum = "d8aa86934b44c19c50f87cc2790e19f54f7a67aedb64101c2e1a2e5ecfb73944"
 dependencies = [
  "clap_builder",
- "clap_derive 4.5.28",
+ "clap_derive 4.5.32",
 ]
 
 [[package]]
 name = "clap_builder"
-version = "4.5.31"
+version = "4.5.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5589e0cba072e0f3d23791efac0fd8627b49c829c196a492e88168e6a669d863"
+checksum = "2414dbb2dd0695280da6ea9261e327479e9d37b0630f6b53ba2a11c60c679fd9"
 dependencies = [
  "anstream",
  "anstyle",
@@ -249,14 +250,14 @@ dependencies = [
 
 [[package]]
 name = "clap_derive"
-version = "4.5.28"
+version = "4.5.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bf4ced95c6f4a675af3da73304b9ac4ed991640c36374e4b46795c49e17cf1ed"
+checksum = "09176aae279615badda0765c0c0b3f6ed53f4709118af73cf4655d85d1530cd7"
 dependencies = [
  "heck 0.5.0",
  "proc-macro2",
  "quote",
- "syn 2.0.91",
+ "syn 2.0.100",
 ]
 
 [[package]]
@@ -286,7 +287,7 @@ dependencies = [
 name = "codingquest_clp_solutions"
 version = "0.1.0"
 dependencies = [
- "clap 4.5.31",
+ "clap 4.5.35",
  "codingquest_clp",
  "itertools",
 ]
@@ -314,20 +315,20 @@ checksum = "97369cbbc041bc366949bc74d34658d6cda5621039731c6310521892a3a20ae0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.91",
+ "syn 2.0.100",
 ]
 
 [[package]]
 name = "either"
-version = "1.13.0"
+version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "60b1af1c220855b6ceac025d3f6ecdd2b7c4894bfe9cd9bda4fbb4bc7c0d4cf0"
+checksum = "48c757948c5ede0e46177b7add2e67155f70e33c07fea8284df6576da70b3719"
 
 [[package]]
 name = "errno"
-version = "0.3.10"
+version = "0.3.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "33d852cb9b869c2a9b3df2f71a3074817f01e1844f839a144f5fcef059a4eb5d"
+checksum = "976dd42dc7e85965fe702eb8164f21f450704bdde31faefd6471dba214cb594e"
 dependencies = [
  "libc",
  "windows-sys 0.59.0",
@@ -363,9 +364,9 @@ checksum = "37909eebbb50d72f9059c3b6d82c0463f2ff062c9e95845c43a6c9c0355411be"
 
 [[package]]
 name = "flate2"
-version = "1.0.35"
+version = "1.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c936bfdafb507ebbf50b8074c54fa31c5be9a1e7e5f467dd659697041407d07c"
+checksum = "7ced92e76e966ca2fd84c8f7aa01a4aea65b0eb6648d72f7c8f3e2764a67fece"
 dependencies = [
  "crc32fast",
  "miniz_oxide",
@@ -388,7 +389,19 @@ checksum = "c4567c8db10ae91089c99af84c68c38da3ec2f087c3f82960bcdbf3656b6f4d7"
 dependencies = [
  "cfg-if",
  "libc",
- "wasi",
+ "wasi 0.11.0+wasi-snapshot-preview1",
+]
+
+[[package]]
+name = "getrandom"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73fea8450eea4bac3940448fb7ae50d91f034f941199fcd9d909a5a07aa455f0"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "r-efi",
+ "wasi 0.14.2+wasi-0.2.4",
 ]
 
 [[package]]
@@ -465,9 +478,9 @@ dependencies = [
 
 [[package]]
 name = "icu_locid_transform_data"
-version = "1.5.0"
+version = "1.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fdc8ff3388f852bede6b579ad4e978ab004f139284d7b28715f773507b946f6e"
+checksum = "7515e6d781098bf9f7205ab3fc7e9709d34554ae0b21ddbcb5febfa4bc7df11d"
 
 [[package]]
 name = "icu_normalizer"
@@ -489,9 +502,9 @@ dependencies = [
 
 [[package]]
 name = "icu_normalizer_data"
-version = "1.5.0"
+version = "1.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f8cafbf7aa791e9b22bec55a167906f9e1215fd475cd22adfcf660e03e989516"
+checksum = "c5e8338228bdc8ab83303f16b797e177953730f601a96c25d10cb3ab0daa0cb7"
 
 [[package]]
 name = "icu_properties"
@@ -510,9 +523,9 @@ dependencies = [
 
 [[package]]
 name = "icu_properties_data"
-version = "1.5.0"
+version = "1.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "67a8effbc3dd3e4ba1afa8ad918d5684b8868b3b26500753effea8d2eed19569"
+checksum = "85fb8799753b75aee8d2a21d7c14d9f38921b54b3dbda10f5a3c7a7b82dba5e2"
 
 [[package]]
 name = "icu_provider"
@@ -539,7 +552,7 @@ checksum = "1ec89e9337638ecdc08744df490b221a7399bf8d164eb52a665454e60e075ad6"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.91",
+ "syn 2.0.100",
 ]
 
 [[package]]
@@ -590,33 +603,33 @@ dependencies = [
 
 [[package]]
 name = "itoa"
-version = "1.0.14"
+version = "1.0.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d75a2a4b1b190afb6f5425f10f6a8f959d2ea0b9c2b1d79553551850539e4674"
+checksum = "4a5f13b858c8d314ee3e8f639011f7ccefe71f97f96e50151fb991f267928e2c"
 
 [[package]]
 name = "libc"
-version = "0.2.169"
+version = "0.2.171"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b5aba8db14291edd000dfcc4d620c7ebfb122c613afb886ca8803fa4e128a20a"
+checksum = "c19937216e9d3aa9956d9bb8dfc0b0c8beb6058fc4f7a4dc4d850edf86a237d6"
 
 [[package]]
 name = "linux-raw-sys"
-version = "0.4.14"
+version = "0.9.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "78b3ae25bc7c8c38cec158d1f2757ee79e9b3740fbc7ccf0e59e4b08d793fa89"
+checksum = "fe7db12097d22ec582439daf8618b8fdd1a7bef6270e9af3b1ebcd30893cf413"
 
 [[package]]
 name = "litemap"
-version = "0.7.4"
+version = "0.7.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4ee93343901ab17bd981295f2cf0026d4ad018c7c31ba84549a4ddbb47a45104"
+checksum = "23fb14cb19457329c82206317a5663005a4d404783dc74f4252769b0d5f42856"
 
 [[package]]
 name = "log"
-version = "0.4.22"
+version = "0.4.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a7a70ba024b9dc04c27ea2f0c0548feb474ec5c54bba33a7f72f873a39d07b24"
+checksum = "13dc2df351e3202783a1fe0d44375f7295ffb4049267b0f3018346dc122a1d94"
 
 [[package]]
 name = "memchr"
@@ -626,9 +639,9 @@ checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
 
 [[package]]
 name = "miniz_oxide"
-version = "0.8.2"
+version = "0.8.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4ffbe83022cedc1d264172192511ae958937694cd57ce297164951b8b3568394"
+checksum = "3be647b768db090acb35d5ec5db2b0e1f1de11133ca123b9eacf5137868f892a"
 dependencies = [
  "adler2",
 ]
@@ -717,9 +730,9 @@ dependencies = [
 
 [[package]]
 name = "once_cell"
-version = "1.20.2"
+version = "1.21.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1261fe7e33c73b354eab43b1273a57c8f967d0391e80353e51f764ac02cf6775"
+checksum = "42f5e15c9953c5e4ccceeb2e7382a716482c34515315f7b03532b8b4e8393d2d"
 
 [[package]]
 name = "os_str_bytes"
@@ -771,22 +784,28 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.92"
+version = "1.0.94"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "37d3544b3f2748c54e147655edb5025752e2303145b5aefb3c3ea2c78b973bb0"
+checksum = "a31971752e70b8b2686d7e46ec17fb38dad4051d94024c88df49b667caea9c84"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.37"
+version = "1.0.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b5b9d34b8991d19d98081b46eacdd8eb58c6f2b201139f7c5f643cc155a633af"
+checksum = "1885c039570dc00dcb4ff087a89e185fd56bae234ddc7f056a945bf36467248d"
 dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "r-efi"
+version = "5.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "74765f6d916ee2faa39bc8e68e4f3ed8949b48cccdac59983d287a7cb71ce9c5"
+
 [[package]]
 name = "regex"
 version = "1.11.1"
@@ -818,15 +837,14 @@ checksum = "2b15c43186be67a4fd63bee50d0303afffcef381492ebe2c5d87f324e1b8815c"
 
 [[package]]
 name = "ring"
-version = "0.17.8"
+version = "0.17.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c17fa4cb658e3583423e915b9f3acc01cceaee1860e33d59ebae66adc3a2dc0d"
+checksum = "a4689e6c2294d81e88dc6261c768b63bc4fcdb852be6d1352498b114f61383b7"
 dependencies = [
  "cc",
  "cfg-if",
- "getrandom",
+ "getrandom 0.2.15",
  "libc",
- "spin",
  "untrusted",
  "windows-sys 0.52.0",
 ]
@@ -839,11 +857,11 @@ checksum = "719b953e2095829ee67db738b3bfa9fa368c94900df327b3f07fe6e794d2fe1f"
 
 [[package]]
 name = "rustix"
-version = "0.38.42"
+version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f93dc38ecbab2eb790ff964bb77fa94faf256fd3e73285fd7ba0903b76bedb85"
+checksum = "d97817398dd4bb2e6da002002db259209759911da105da92bec29ccb12cf58bf"
 dependencies = [
- "bitflags 2.6.0",
+ "bitflags 2.9.0",
  "errno",
  "libc",
  "linux-raw-sys",
@@ -852,9 +870,9 @@ dependencies = [
 
 [[package]]
 name = "rustls"
-version = "0.23.20"
+version = "0.23.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5065c3f250cbd332cd894be57c40fa52387247659b14a2d6041d121547903b1b"
+checksum = "822ee9188ac4ec04a2f0531e55d035fb2de73f18b41a63c70c2712503b6fb13c"
 dependencies = [
  "log",
  "once_cell",
@@ -867,15 +885,15 @@ dependencies = [
 
 [[package]]
 name = "rustls-pki-types"
-version = "1.10.1"
+version = "1.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d2bf47e6ff922db3825eb750c4e2ff784c6ff8fb9e13046ef6a1d1c5401b0b37"
+checksum = "917ce264624a4b4db1c364dcc35bfca9ded014d0a958cd47ad3e960e988ea51c"
 
 [[package]]
 name = "rustls-webpki"
-version = "0.102.8"
+version = "0.103.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "64ca1bc8749bd4cf37b5ce386cc146580777b4e8572c7b97baf22c83f444bee9"
+checksum = "fef8b8769aaccf73098557a87cd1816b4f9c7c16811c9c77142aa695c16f2c03"
 dependencies = [
  "ring",
  "rustls-pki-types",
@@ -884,41 +902,41 @@ dependencies = [
 
 [[package]]
 name = "rustversion"
-version = "1.0.18"
+version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0e819f2bc632f285be6d7cd36e25940d45b2391dd6d9b939e79de557f7014248"
+checksum = "eded382c5f5f786b989652c49544c4877d9f015cc22e145a5ea8ea66c2921cd2"
 
 [[package]]
 name = "ryu"
-version = "1.0.18"
+version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
+checksum = "28d3b2b1366ec20994f1fd18c3c594f05c5dd4bc44d8bb0c1c632c8d6829481f"
 
 [[package]]
 name = "serde"
-version = "1.0.216"
+version = "1.0.219"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0b9781016e935a97e8beecf0c933758c97a5520d32930e460142b4cd80c6338e"
+checksum = "5f0e2c6ed6606019b4e29e69dbaba95b11854410e5347d525002456dbbb786b6"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.216"
+version = "1.0.219"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "46f859dbbf73865c6627ed570e78961cd3ac92407a2d117204c49232485da55e"
+checksum = "5b0276cf7f2c73365f7157c8123c21cd9a50fbbd844757af28ca1f5925fc2a00"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.91",
+ "syn 2.0.100",
 ]
 
 [[package]]
 name = "serde_json"
-version = "1.0.134"
+version = "1.0.140"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d00f4175c42ee48b15416f6193a959ba3a0d67fc699a0db9ad12df9f83991c7d"
+checksum = "20068b6e96dc6c9bd23e01df8827e6c7e1f2fddd43c21810382803c136b99373"
 dependencies = [
  "itoa",
  "memchr",
@@ -934,15 +952,9 @@ checksum = "0fda2ff0d084019ba4d7c6f371c95d8fd75ce3524c3cb8fb653a3023f6323e64"
 
 [[package]]
 name = "smallvec"
-version = "1.13.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3c5e1a9a646d36c3599cd173a41282daf47c44583ad367b8e6837255952e5c67"
-
-[[package]]
-name = "spin"
-version = "0.9.8"
+version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6980e8d7511241f8acf4aebddbb1ff938df5eebe98691418c4468d0b72a96a67"
+checksum = "8917285742e9f3e1683f0a9c4e6b57960b7314d0b08d30d1ecd426713ee2eee9"
 
 [[package]]
 name = "stable_deref_trait"
@@ -981,7 +993,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "rustversion",
- "syn 2.0.91",
+ "syn 2.0.100",
 ]
 
 [[package]]
@@ -1003,9 +1015,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.91"
+version = "2.0.100"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d53cbcb5a243bd33b7858b1d7f4aca2153490815872d86d955d6ea29f743c035"
+checksum = "b09a44accad81e1ba1cd74a32461ba89dee89095ba17b32f5d03683b1b1fc2a0"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1032,17 +1044,17 @@ checksum = "c8af7666ab7b6390ab78131fb5b0fce11d6b7a6951602017c35fa82800708971"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.91",
+ "syn 2.0.100",
 ]
 
 [[package]]
 name = "tempfile"
-version = "3.14.0"
+version = "3.19.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "28cce251fcbc87fac86a866eeb0d6c2d536fc16d06f184bb61aeae11aa4cee0c"
+checksum = "7437ac7763b9b123ccf33c338a5cc1bac6f69b45a136c19bdd8a65e3916435bf"
 dependencies = [
- "cfg-if",
  "fastrand",
+ "getrandom 0.3.2",
  "once_cell",
  "rustix",
  "windows-sys 0.59.0",
@@ -1059,9 +1071,9 @@ dependencies = [
 
 [[package]]
 name = "textwrap"
-version = "0.16.1"
+version = "0.16.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23d434d3f8967a09480fb04132ebe0a3e088c173e6d0ee7897abbdf4eab0f8b9"
+checksum = "c13547615a44dc9c452a8a534638acdf07120d4b6847c8178705da06306a3057"
 
 [[package]]
 name = "tinystr"
@@ -1075,9 +1087,9 @@ dependencies = [
 
 [[package]]
 name = "unicode-ident"
-version = "1.0.14"
+version = "1.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "adb9e6ca4f869e1180728b7950e35922a7fc6397f7b641499e8f3ef06e50dc83"
+checksum = "5a5f39404a5da50712a4c1eecf25e90dd62b613502b7e925fd4e4d19b5c96512"
 
 [[package]]
 name = "unicode-xid"
@@ -1148,11 +1160,20 @@ version = "0.11.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
 
+[[package]]
+name = "wasi"
+version = "0.14.2+wasi-0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9683f9a5a998d873c0d21fcbe3c083009670149a8fab228644b8bd36b2c48cb3"
+dependencies = [
+ "wit-bindgen-rt",
+]
+
 [[package]]
 name = "webpki-roots"
-version = "0.26.7"
+version = "0.26.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5d642ff16b7e79272ae451b7322067cdc17cadf68c23264be9d94a32319efe7e"
+checksum = "2210b291f7ea53617fbafcc4939f10914214ec15aace5ba62293a668f322c5c9"
 dependencies = [
  "rustls-pki-types",
 ]
@@ -1270,6 +1291,15 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
 
+[[package]]
+name = "wit-bindgen-rt"
+version = "0.39.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6f42320e61fe2cfd34354ecb597f86f413484a798ba44a8ca1165c58d42da6c1"
+dependencies = [
+ "bitflags 2.9.0",
+]
+
 [[package]]
 name = "write16"
 version = "1.0.0"
@@ -1302,28 +1332,28 @@ checksum = "2380878cad4ac9aac1e2435f3eb4020e8374b5f13c296cb75b4620ff8e229154"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.91",
+ "syn 2.0.100",
  "synstructure 0.13.1",
 ]
 
 [[package]]
 name = "zerofrom"
-version = "0.1.5"
+version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cff3ee08c995dee1859d998dea82f7374f2826091dd9cd47def953cae446cd2e"
+checksum = "50cc42e0333e05660c3587f3bf9d0478688e15d870fab3346451ce7f8c9fbea5"
 dependencies = [
  "zerofrom-derive",
 ]
 
 [[package]]
 name = "zerofrom-derive"
-version = "0.1.5"
+version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "595eed982f7d355beb85837f651fa22e90b3c044842dc7f2c2842c086f295808"
+checksum = "d71e5d6e06ab090c67b5e44993ec16b72dcbaabc526db883a360057678b48502"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.91",
+ "syn 2.0.100",
  "synstructure 0.13.1",
 ]
 
@@ -1352,5 +1382,5 @@ checksum = "6eafa6dfb17584ea3e2bd6e76e0cc15ad7af12b09abdd1ca55961bed9b1063c6"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.91",
+ "syn 2.0.100",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 8ed7b9d..47e7ca7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,10 +4,10 @@ members = ["aoclp", "aoclp_solutions", "codingquest_clp", "codingquest_clp_solut
 default-members = ["aoclp_solutions"]
 
 [workspace.dependencies]
-anyhow = "1.0.96"
+anyhow = "1.0.97"
 aocf = "0.1.21"
 bit-vec = "0.8.0"
-clap = { version = "4.5.31", features = ["derive"] }
+clap = { version = "4.5.35", features = ["derive"] }
 itertools = "0.14.0"
 num = "0.4.3"
 paste = "1.0.15"
diff --git a/LICENSE b/LICENSE
index 62ec544..f706171 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2024 Charles Lechasseur
+Copyright (c) 2024-2025 Charles Lechasseur
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/aoclp/src/looping.rs b/aoclp/src/looping.rs
index 319a87c..daccc2d 100644
--- a/aoclp/src/looping.rs
+++ b/aoclp/src/looping.rs
@@ -93,7 +93,7 @@ where
         self.len()
     }
 
-    fn last(self) -> Option<Self::Item>
+    fn last(mut self) -> Option<Self::Item>
     where
         Self: Sized,
     {
@@ -105,7 +105,7 @@ where
         self.cycle
             .into_iter()
             .nth(last_pos_in_cycle)
-            .or_else(|| self.prefix.last())
+            .or_else(|| self.prefix.next_back())
     }
 
     fn nth(&mut self, n: usize) -> Option<Self::Item> {
diff --git a/aoclp_solutions/Cargo.toml b/aoclp_solutions/Cargo.toml
index 78bb36e..2670a88 100644
--- a/aoclp_solutions/Cargo.toml
+++ b/aoclp_solutions/Cargo.toml
@@ -2,7 +2,7 @@
 name = "aoclp_solutions"
 version = "0.1.0"
 edition = "2021"
-rust-version = "1.75.0"
+rust-version = "1.81.0"
 
 [dependencies]
 aoclp = { path = "../aoclp" }
diff --git a/aoclp_solutions/README.md b/aoclp_solutions/README.md
index 12ef362..e1e9d13 100644
--- a/aoclp_solutions/README.md
+++ b/aoclp_solutions/README.md
@@ -4,7 +4,7 @@ My solutions to [Advent of Code](https://adventofcode.com/) puzzles in Rust 🦀
 
 ## Requirements
 
-* [Rust](https://www.rust-lang.org/) 1.75.0 or later
+* [Rust](https://www.rust-lang.org/) 1.81.0 or later
 * [aocf](https://crates.io/crates/aocf) CLI
 
 ## Setting your session cookie
diff --git a/codingquest_clp_solutions/Cargo.toml b/codingquest_clp_solutions/Cargo.toml
index 79da08f..c3193f9 100644
--- a/codingquest_clp_solutions/Cargo.toml
+++ b/codingquest_clp_solutions/Cargo.toml
@@ -2,7 +2,7 @@
 name = "codingquest_clp_solutions"
 version = "0.1.0"
 edition = "2021"
-rust-version = "1.75.0"
+rust-version = "1.81.0"
 
 [dependencies]
 clap = { workspace = true, features = ["derive"] }
diff --git a/codingquest_clp_solutions/README.md b/codingquest_clp_solutions/README.md
index 2b0e0f9..5420b83 100644
--- a/codingquest_clp_solutions/README.md
+++ b/codingquest_clp_solutions/README.md
@@ -4,7 +4,7 @@ My solutions to [Coding Quest](https://codingquest.io/) puzzles in Rust 🦀
 
 ## Requirements
 
-* [Rust](https://www.rust-lang.org/) 1.75.0 or later
+* [Rust](https://www.rust-lang.org/) 1.81.0 or later
 
 ## Saving problem input data
 
diff --git a/justfile b/justfile
index 5400f42..9fe799e 100644
--- a/justfile
+++ b/justfile
@@ -4,9 +4,14 @@ toolchain := ""
 tool := "cargo"
 
 cargo := tool + (if toolchain != "" { " +" + toolchain } else { "" })
+cargo_nightly := cargo + " +nightly"
+cargo_hack := cargo + " hack"
+cargo_tarpaulin := cargo + " tarpaulin"
+cargo_llvm_cov := cargo_nightly + " llvm-cov"
 
 all_features := "true"
 all_features_flag := if all_features == "true" { "--all-features" } else { "" }
+feature_powerset_flag := if all_features == "true" { "--feature-powerset" } else { "" }
 
 all_targets := "true"
 all_targets_flag := if all_targets == "true" { "--all-targets" } else { "" }
@@ -20,58 +25,81 @@ target_tuple_flag := if target_tuple != "" { "--target " + target_tuple } else {
 release := "false"
 release_flag := if release == "true" { "--release" } else { "" }
 
-cargo_tarpaulin := tool + " tarpaulin"
+workspace := "true"
+package := ""
+workspace_flag := if workspace != "true" { "" } else if package != "" { "" } else { "--workspace" }
+all_flag := if workspace_flag == "" { "" } else { "--all" }
+package_flag := if package != "" { "--package " + package } else { workspace_flag }
+package_all_flag := if package != "" { "--package " + package } else { all_flag }
+package_only_flag := if package != "" { "--package " + package } else { "" }
+
+warnings_as_errors := "true"
+clippy_flags := if warnings_as_errors == "true" { "-- -D warnings" } else { "" }
+
+force_prep := "false"
+force_prep_flag := if force_prep == "true" { "--force" } else { "" }
+
+just := "just all_features=" + all_features + " all_targets=" + all_targets + " message_format=" + message_format + " target_tuple=" + target_tuple + " release=" + release + " workspace=" + workspace + " package=" + package + " warnings_as_errors=" + warnings_as_errors + " force_prep=" + force_prep
+
+skip_test_reqs_value := "running"
 
 [private]
 default:
     @just --list
 
-# Run main executable
-run *extra_args:
-    {{cargo}} run {{all_features_flag}} {{target_tuple_flag}} {{release_flag}} {{ if extra_args != '' { '-- ' + extra_args } else { '' } }}
+@_before-test:
+@_after-test:
+@_check-test-reqs:
+    echo '{{ skip_test_reqs_value }}'
 
-_run_solutions bin_name *extra_args:
-    {{cargo}} run --package {{bin_name}} {{all_features_flag}} {{target_tuple_flag}} {{release_flag}} {{ if extra_args != '' { '-- ' + extra_args } else { '' } }}
+@_run-tests *cmd:
+    {{ if env('CI', '') != '' { cmd } else if `just _check-test-reqs` == skip_test_reqs_value { cmd } else { just + " _run-with-test-reqs " + cmd } }}
 
-# Run AoC solutions executable
-@aoc *extra_args:
-    just _run_solutions aoclp_solutions {{extra_args}}
+_run-with-test-reqs *cmd: _before-test && _after-test
+    {{cmd}}
 
-# Run CodingQuest.io solutions executable
-@cq *extra_args:
-    just _run_solutions codingquest_clp_solutions {{extra_args}}
+# Run an executable
+run bin_name="" *extra_args: (_run-it "--bin" bin_name extra_args)
+
+# Run an example
+teach example_name *extra_args: (_run-it "--example" example_name extra_args)
 
-# Run clippy and rustfmt on workspace files
+_run-it run_param run_param_value *extra_args:
+    {{cargo}} run {{package_only_flag}} {{all_features_flag}} {{target_tuple_flag}} {{release_flag}} {{ if run_param_value != '' { run_param + ' ' + run_param_value } else { '' } }} {{ if extra_args != '' { '-- ' + extra_args } else { '' } }}
+
+# Run `cargo hack clippy` for the feature powerset and rustfmt
 tidy: clippy fmt
 
-# Run clippy on workspace files
-clippy:
-    {{cargo}} clippy --workspace {{all_targets_flag}} {{all_features_flag}} {{target_tuple_flag}} -- -D warnings
+# Run `cargo hack clippy` for the feature powerset
+clippy *extra_args:
+    {{cargo_hack}} clippy {{package_flag}} {{all_targets_flag}} {{feature_powerset_flag}} {{message_format_flag}} {{target_tuple_flag}} {{extra_args}} {{clippy_flags}}
 
-# Run rustfmt on workspace files
-fmt:
-    cargo +nightly fmt --all
+# Run rustfmt
+fmt *extra_args:
+    {{cargo_nightly}} fmt {{package_all_flag}} {{message_format_flag}} {{extra_args}}
 
-# Run `cargo check` on workspace
+# Run `cargo check`
 check *extra_args:
-    {{cargo}} check --workspace {{all_targets_flag}} {{all_features_flag}} {{message_format_flag}} {{target_tuple_flag}} {{release_flag}} {{extra_args}}
+    {{cargo}} check {{package_flag}} {{all_targets_flag}} {{all_features_flag}} {{message_format_flag}} {{target_tuple_flag}} {{release_flag}} {{extra_args}}
+
+# Run `cargo hack check` for the feature powerset
+check-powerset *extra_args:
+    {{cargo_hack}} check {{package_flag}} --no-dev-deps --lib --bins {{feature_powerset_flag}} {{message_format_flag}} {{target_tuple_flag}} {{release_flag}} {{extra_args}}
 
-# Run `cargo build` on workspace
+# Run `cargo build`
 build *extra_args:
-    {{cargo}} build --workspace {{all_targets_flag}} {{all_features_flag}} {{message_format_flag}} {{target_tuple_flag}} {{release_flag}} {{extra_args}}
+    {{cargo}} build {{package_flag}} {{all_targets_flag}} {{all_features_flag}} {{message_format_flag}} {{target_tuple_flag}} {{release_flag}} {{extra_args}}
 
-# Run `cargo test` on workspace
-test *extra_args:
-    {{cargo}} test --workspace {{all_features_flag}} {{message_format_flag}} {{target_tuple_flag}} {{release_flag}} {{extra_args}}
+# Run `cargo test`
+@test *extra_args: (_run-tests cargo "test" package_flag all_features_flag message_format_flag target_tuple_flag release_flag extra_args)
 
 # Run `cargo update` to update dependencies in Cargo.lock
 update *extra_args:
     {{cargo}} update {{extra_args}}
 
 # Run `cargo tarpaulin` to produce code coverage
-@tarpaulin *extra_args:
-    @{{cargo_tarpaulin}} --target-dir target-tarpaulin {{extra_args}}
-    {{ if env('CI', '') == '' { `just _open-tarpaulin` } else { ` ` } }}
+@tarpaulin *extra_args: (_run-tests cargo_tarpaulin "--target-dir target/tarpaulin-target" extra_args)
+    {{ if env('CI', '') == '' { "just _open-tarpaulin" } else { "" } }}
 
 [unix]
 @_open-tarpaulin:
@@ -81,54 +109,58 @@ update *extra_args:
 @_open-tarpaulin:
     ./tarpaulin-report.html
 
+# Run `cargo llvm-cov` to produce code coverage
+@llvm-cov *extra_args: (_run-tests cargo_llvm_cov "--codecov --output-path codecov.json" package_flag all_targets_flag all_features_flag target_tuple_flag extra_args)
+    {{cargo_llvm_cov}} report --html {{ if env('CI', '') == '' { '--open' } else { '' } }}
+
 # Generate documentation with rustdoc
 doc: _doc
 
 _doc $RUSTDOCFLAGS="-D warnings":
-    {{cargo}} doc {{ if env('CI', '') != '' { '--no-deps' } else { '--open' } }} --workspace {{all_features_flag}} {{message_format_flag}}
+    {{cargo}} doc {{ if env('CI', '') != '' { '--no-deps' } else { '--open' } }} {{package_flag}} {{all_features_flag}} {{message_format_flag}}
 
 # Check doc coverage with Nightly rustdoc
 doc-coverage: _doc-coverage
 
 _doc-coverage $RUSTDOCFLAGS="-Z unstable-options --show-coverage":
-    cargo +nightly doc --no-deps --workspace {{all_features_flag}} {{message_format_flag}}
+    {{cargo_nightly}} doc --no-deps {{package_flag}} {{all_features_flag}} {{message_format_flag}}
 
 [private]
 minimize:
-    {{cargo}} hack --remove-dev-deps --workspace
-    cargo +nightly update -Z minimal-versions
+    {{cargo_hack}} --remove-dev-deps {{package_flag}}
+    {{cargo_nightly}} update -Z minimal-versions
 
-# Run `cargo minimal-versions check` on workspace
-check-minimal: prep _check-minimal-only && (_rimraf "target-minimal") unprep
+# Run `cargo minimal-versions check`
+check-minimal: prep _check-minimal-only && unprep
 
-_check-minimal-only: (_rimraf "target-minimal")
-    {{cargo}} minimal-versions check --target-dir target-minimal --workspace --lib --bins {{all_features_flag}} {{message_format_flag}}
+_check-minimal-only: (_rimraf "target/check-minimal-target")
+    {{cargo}} minimal-versions check --target-dir target/check-minimal-target {{package_flag}} --lib --bins {{all_features_flag}} {{message_format_flag}}
 
 # Run `cargo msrv` with `cargo minimal-versions check`
-msrv-minimal: (prep "--manifest-backup-suffix .msrv-prep.outer.bak") && (_rimraf "target-minimal") (unprep "--manifest-backup-suffix .msrv-prep.outer.bak")
-    {{cargo}} msrv find -- just all_features="{{all_features}}" message_format="{{message_format}}" target_tuple="{{target_tuple}}" _check-minimal-only
+msrv-minimal: (prep "--manifest-backup-suffix .msrv-prep.outer.bak") && (unprep "--manifest-backup-suffix .msrv-prep.outer.bak")
+    {{cargo}} msrv find -- {{just}} _check-minimal-only
 
 # Run `cargo msrv` with `cargo check`
-msrv *extra_args: (prep "--manifest-backup-suffix .msrv-prep.outer.bak --no-merge-pinned-dependencies") && (_rimraf "target-msrv") (unprep "--manifest-backup-suffix .msrv-prep.outer.bak")
-    {{cargo}} msrv find -- just all_features="{{all_features}}" all_targets="{{all_targets}}" message_format="{{message_format}}" target_tuple="{{target_tuple}}" _msrv-check {{extra_args}}
+msrv *extra_args: (prep "--manifest-backup-suffix .msrv-prep.outer.bak --no-merge-pinned-dependencies") && (unprep "--manifest-backup-suffix .msrv-prep.outer.bak")
+    {{cargo}} msrv find -- {{just}} _msrv-check {{extra_args}}
 
-_msrv-check *extra_args: (_rimraf "target-msrv")
-    just all_features="{{all_features}}" all_targets="{{all_targets}}" message_format="{{message_format}}" target_tuple="{{target_tuple}}" check --target-dir target-msrv {{extra_args}}
+_msrv-check *extra_args: (_rimraf "target/msrv-target") (check "--target-dir target/msrv-target" extra_args)
 
-# Perform `cargo publish` dry-run
+# Perform `cargo publish` dry-run on a package
 test-package *extra_args:
-    {{cargo}} publish --dry-run {{extra_args}}
+    {{cargo}} publish {{package_flag}} --dry-run {{extra_args}}
 
-# Run `cargo msrv-prep` on workspace
+# Run `cargo msrv-prep`
 prep *extra_args:
-    {{cargo}} msrv-prep --workspace {{extra_args}}
+    {{cargo}} msrv-prep {{package_flag}} --backup-root-manifest {{force_prep_flag}} {{extra_args}}
 
-# Run `cargo msrv-unprep` on workspace
+# Run `cargo msrv-unprep`
 unprep *extra_args:
-    {{cargo}} msrv-unprep --workspace {{extra_args}}
+    {{cargo}} msrv-unprep {{package_flag}} --backup-root-manifest {{extra_args}}
 
 # ----- Utilities -----
 
+# Removes a directory (like `rm -rf`)
 @_rimraf target_dir:
     {{ if path_exists(target_dir) == "true" { "just _rimraf-it '" + target_dir + "'" } else { "" } }}
 
@@ -139,3 +171,18 @@ unprep *extra_args:
 [windows]
 @_rimraf-it target_dir:
     Remove-Item "{{target_dir}}" -Recurse
+
+# Prints state of docker container to stdout
+@_check-container-state name:
+    docker container ls --filter "name={{name}}" --format "{{{{.State}}"
+
+# ----- Project-specific recipes -----
+
+_run_solutions bin_name *extra_args:
+    {{cargo}} run --package {{bin_name}} {{all_features_flag}} {{target_tuple_flag}} {{release_flag}} {{ if extra_args != '' { '-- ' + extra_args } else { '' } }}
+
+# Run AoC solutions executable
+aoc *extra_args: (_run_solutions "aoclp_solutions" extra_args)
+
+# Run CodingQuest.io solutions executable
+cq *extra_args: (_run_solutions "codingquest_clp_solutions" extra_args)