thomashoneyman · Oct 15, 2026 · Oct 15, 2026 · Oct 15, 2026 · Oct 15, 2026 · Oct 15, 2026
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
@@ -6,30 +6,29 @@ on:
   pull_request:
     branches: [master]
 
+permissions:
+  contents: read
+
 jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-
-      - uses: purescript-contrib/setup-purescript@main
-        with:
-          purescript: "unstable"
-
-      - uses: actions/setup-node@v2
+      - uses: actions/checkout@v6
+      - uses: actions/setup-node@v6
         with:
-          node-version: "14.x"
+          node-version: "24"
 
       - name: Install dependencies
-        run: |
-          npm install -g bower
-          npm install
-          bower install --production
+        run: npm install
 
       - name: Build source
-        run: npm run-script build
+        run: npm run build
 
       - name: Run tests
-        run: |
-          bower install
-          npm run-script test --if-present
+        run: npm test
+
+      - name: Run benchmarks
+        run: npm run bench
+
+      - name: Check formatting
+        run: npm run format:check
diff --git a/.gitignore b/.gitignore
@@ -1,7 +1,9 @@
 /.*
 !/.gitignore
 !/.github/
+!/.tidyrc.json
 /bower_components/
 /node_modules/
 /output/
-package-lock.json
+/package-lock.json
+/spago.lock
diff --git a/.tidyrc.json b/.tidyrc.json
@@ -0,0 +1,10 @@
+{
+  "importSort": "ide",
+  "importWrap": "source",
+  "indent": 2,
+  "operatorsFile": null,
+  "ribbon": 1,
+  "typeArrowPlacement": "first",
+  "unicode": "never",
+  "width": null
+}
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -12,9 +12,17 @@ Bugfixes:
 
 Other improvements:
 
+## [v7.0.1](https://github.com/purescript/purescript-lists/releases/tag/v7.0.1) - 2026-10-17
+
+Other improvements:
+
+- Migrate from Bower/Pulp to Spago and update CI (#223 by @thomashoneyman).
+- Explicitly use `join` for `concat` (#212).
+
 ## [v7.0.0](https://github.com/purescript/purescript-lists/releases/tag/v7.0.0) - 2022-04-27
 
 Breaking changes:
+
 - Update project and deps to PureScript v0.15.0 (#203 by @JordanMartinez)
 - Drop deprecated `MonadZero` instance (#205 by @JordanMartinez)
 - Drop deprecated `group'` and `mapWithIndex` (#206 by @JordanMartinez)
@@ -31,40 +39,46 @@ Other improvements:
 Breaking changes:
 
 New features:
+
 - Added `cons` for `Lazy.NonEmptyList` (#143 by @matthewleon)
 
 Bugfixes:
 
 Other improvements:
+
 - Fix ad-hoc usage of case expression (#202 by @JordanMartinez)
 
 ## [v6.0.1](https://github.com/purescript/purescript-lists/releases/tag/v6.0.1) - 2021-04-19
 
 Other improvements:
+
 - Fixed warnings revealed by v0.14.1 PS release (#198 by @JordanMartinez)
 
 ## [v6.0.0](https://github.com/purescript/purescript-lists/releases/tag/v6.0.0) - 2021-02-26
 
 Breaking changes:
+
 - Converted `nub`/`nubBy` to use ordering, rather than equality (#179)
 - Renamed `scanrLazy` to `scanlLazy` and fixed parameter ordering (#161)
 - Renamed `group'` to `groupAll` (#182)
 - Changed `Alt ZipList` to satisfy distributivity (#150)
 - Updated the `Show` instances for (non empty) lazy lists (#181)
 
 New features:
+
 - Added `nubEq`/`nubByEq` (#179)
 - Added `groupAllBy` (#182)
 - Added `Eq1` and `Ord1` instances to `NonEmptyList` and `LazyNonEmptyList` (#188)
 
 Bugfixes:
 
 Other improvements:
+
 - Fixed Lazy List docs where original list is returned instead of Nothing (#169)
 - Migrated to GitHub Actions (#177)
 - Changed `foldM` type signature to more closely match `foldl` (#165)
 - Improved `foldr` performance on large lists (#180)
-- Generated changelog and add PR template (#187) 
+- Generated changelog and add PR template (#187)
 
 ## [v5.4.1](https://github.com/purescript/purescript-lists/releases/tag/v5.4.1) - 2019-05-06
 
@@ -308,6 +322,7 @@ Make `Apply` and `Bind` instances for `ListT` consistent. (@puffnfresh)
 ## [v0.6.0](https://github.com/purescript/purescript-lists/releases/tag/v0.6.0) - 2015-02-21
 
 **This release requires PureScript v0.6.8 or later**
+
 - Updated dependencies
 
 ## [v0.5.0](https://github.com/purescript/purescript-lists/releases/tag/v0.5.0) - 2015-01-10
@@ -320,44 +335,28 @@ Remove `scanl`, bump `foldable` dependency.
 
 ## [v0.3.9](https://github.com/purescript/purescript-lists/releases/tag/v0.3.9) - 2014-12-13
 
-
-
 ## [v0.3.8](https://github.com/purescript/purescript-lists/releases/tag/v0.3.8) - 2014-12-09
 
 Bump `unfoldable` dependency.
 
 ## [v0.3.7](https://github.com/purescript/purescript-lists/releases/tag/v0.3.7) - 2014-11-26
 
-
-
 ## [v0.3.5](https://github.com/purescript/purescript-lists/releases/tag/v0.3.5) - 2014-11-18
 
 Fixes for compiler version 0.6.1
 
 ## [v0.3.4](https://github.com/purescript/purescript-lists/releases/tag/v0.3.4) - 2014-11-14
 
-
-
 ## [v0.3.3](https://github.com/purescript/purescript-lists/releases/tag/v0.3.3) - 2014-11-08
 
-
-
 ## [v0.3.2](https://github.com/purescript/purescript-lists/releases/tag/v0.3.2) - 2014-10-29
 
-
-
 ## [v0.3.1](https://github.com/purescript/purescript-lists/releases/tag/v0.3.1) - 2014-10-06
 
-
-
 ## [v0.3.0](https://github.com/purescript/purescript-lists/releases/tag/v0.3.0) - 2014-10-01
 
 - `ListT` by @jdegoes
 
 ## [v0.2.0](https://github.com/purescript/purescript-lists/releases/tag/v0.2.0) - 2014-08-13
 
-
-
 ## [v0.0.1](https://github.com/purescript/purescript-lists/releases/tag/v0.0.1) - 2014-07-07
-
-
diff --git a/LICENSE-GHC.md b/LICENSE-GHC.md
@@ -7,15 +7,15 @@ Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met:
 
 - Redistributions of source code must retain the above copyright notice,
-this list of conditions and the following disclaimer.
+  this list of conditions and the following disclaimer.
 
 - Redistributions in binary form must reproduce the above copyright notice,
-this list of conditions and the following disclaimer in the documentation
-and/or other materials provided with the distribution.
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
 
 - Neither name of the University nor the names of its contributors may be
-used to endorse or promote products derived from this software without
-specific prior written permission.
+  used to endorse or promote products derived from this software without
+  specific prior written permission.
 
 THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY COURT OF THE UNIVERSITY OF
 GLASGOW AND THE CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
@@ -29,4 +29,3 @@ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 DAMAGE.
-
diff --git a/bench/spago.yaml b/bench/spago.yaml
@@ -0,0 +1,14 @@
+package:
+  name: lists-bench
+  build:
+    strict: true
+    pedanticPackages: true
+  dependencies:
+    - console: ">=6.0.0 <7.0.0"
+    - effect: ">=4.0.0 <5.0.0"
+    - foldable-traversable: ">=6.0.0 <7.0.0"
+    - integers: ">=6.0.0 <7.0.0"
+    - lists: "*"
+    - maybe: ">=6.0.0 <7.0.0"
+    - minibench: ">=4.0.0 <5.0.0"
+    - prelude: ">=6.0.0 <7.0.0"
diff --git a/bench/Bench/Data/List.purs → bench/src/Bench/Data/List.purs b/bench/Bench/Data/List.purs → bench/src/Bench/Data/List.purs
@@ -1,9 +1,10 @@
 module Bench.Data.List where
 
 import Prelude
+
 import Data.Foldable (maximum)
 import Data.Int (pow)
-import Data.List (List(..), take, range, foldr, length)
+import Data.List (List(..), foldr, length, range, take)
 import Data.Maybe (fromMaybe)
 import Data.Traversable (traverse_)
 import Effect (Effect)

diff --git a/bench/Main.purs → bench/src/Main.purs b/bench/Main.purs → bench/src/Main.purs
@@ -1,10 +1,10 @@
 module Bench.Main where
 
 import Prelude
-import Effect (Effect)
-import Effect.Console (log)
 
 import Bench.Data.List (benchList)
+import Effect (Effect)
+import Effect.Console (log)
 
 main :: Effect Unit
 main = do

diff --git a/bower.json b/bower.json
diff --git a/package.json b/package.json
@@ -1,16 +1,18 @@
 {
   "private": true,
   "scripts": {
-    "clean": "rimraf output && rimraf .pulp-cache",
-    "build": "pulp build -- --censor-lib --strict",
-    "test": "pulp test",
-    "bench:build": "purs compile 'bench/**/*.purs' 'src/**/*.purs' 'bower_components/*/src/**/*.purs'",
-    "bench:run": "node --expose-gc -e 'require(\"./output/Bench.Main/index.js\").main()'",
-    "bench": "npm run bench:build && npm run bench:run"
+    "build": "spago build",
+    "test": "spago test -p lists",
+    "bench:build": "spago build -p lists-bench",
+    "bench:run": "node --expose-gc --input-type=module -e 'import { main } from \"./output/Bench.Main/index.js\"; main()'",
+    "bench": "npm run bench:build && npm run bench:run",
+    "format": "purs-tidy format-in-place src test bench/src && oxfmt --write .",
+    "format:check": "purs-tidy check src test bench/src && oxfmt --check ."
   },
   "devDependencies": {
-    "pulp": "16.0.0-0",
-    "purescript-psa": "^0.8.2",
-    "rimraf": "^3.0.2"
+    "oxfmt": "^0.73.0",
+    "purescript": "^0.15.16",
+    "purs-tidy": "^0.11.1",
+    "spago": "^1.0.5"
   }
 }
diff --git a/spago.yaml b/spago.yaml
@@ -0,0 +1,35 @@
+package:
+  name: lists
+  description: Strict and lazy linked lists with helper functions and type class instances
+  build:
+    strict: true
+    pedanticPackages: true
+  publish:
+    version: 7.0.1
+    license: BSD-3-Clause
+    location:
+      githubOwner: purescript
+      githubRepo: purescript-lists
+  dependencies:
+    - bifunctors: ">=6.0.0 <7.0.0"
+    - control: ">=6.0.0 <7.0.0"
+    - foldable-traversable: ">=6.0.0 <7.0.0"
+    - lazy: ">=6.0.0 <7.0.0"
+    - maybe: ">=6.0.0 <7.0.0"
+    - newtype: ">=5.0.0 <6.0.0"
+    - nonempty: ">=7.0.0 <8.0.0"
+    - partial: ">=4.0.0 <5.0.0"
+    - prelude: ">=6.0.0 <7.0.0"
+    - tailrec: ">=6.0.0 <7.0.0"
+    - tuples: ">=7.0.0 <8.0.0"
+    - unfoldable: ">=6.0.0 <7.0.0"
+  test:
+    main: Test.Main
+    strict: true
+    pedanticPackages: true
+    dependencies:
+      - arrays: ">=7.0.0 <8.0.0"
+      - assert: ">=6.0.0 <7.0.0"
+      - console: ">=6.0.0 <7.0.0"
+      - effect: ">=4.0.0 <5.0.0"
+workspace: {}