diff --git a/.changeset/slow-moose-smoke.md b/.changeset/slow-moose-smoke.md
new file mode 100644
index 000000000..f5da14c51
--- /dev/null
+++ b/.changeset/slow-moose-smoke.md
@@ -0,0 +1,5 @@
+---
+'skuba': minor
+---
+
+lint: Add coverage to .prettierignore
diff --git a/.changeset/ten-pets-hug.md b/.changeset/ten-pets-hug.md
new file mode 100644
index 000000000..6c03962f2
--- /dev/null
+++ b/.changeset/ten-pets-hug.md
@@ -0,0 +1,8 @@
+---
+'skuba': minor
+---
+
+lint: Swap out `detect-package-manager` for manual lockfile detection
+
+`detect-package-manager` has been removed, in lieu of using `find-up` to detect the closest
+`pnpm-lock.yaml` or `yarn.lock` to infer the package manager.
diff --git a/.gitignore b/.gitignore
index 694bdef66..67646fed7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -27,3 +27,6 @@ yarn-error.log
 /template/**/pnpm-lock.yaml
 /template/**/yarn.lock
 /packages/**/*/lib*
+
+# otherwise changesets break:
+/packages/**/.npmrc
diff --git a/.prettierignore b/.prettierignore
index 1b5cb4b78..7a4b98cdb 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -5,6 +5,7 @@
 gantry*.yaml
 gantry*.yml
 pnpm-lock.yaml
+coverage
 # end managed by skuba
 
 /integration/base/
diff --git a/package.json b/package.json
index 4f23fef11..7d3f1a2e5 100644
--- a/package.json
+++ b/package.json
@@ -77,7 +77,6 @@
     "@types/node": ">=18.12",
     "chalk": "^4.1.0",
     "concurrently": "^8.0.0",
-    "detect-package-manager": "^3.0.1",
     "dotenv": "^16.0.0",
     "ejs": "^3.1.6",
     "enquirer": "^2.3.6",
@@ -86,6 +85,7 @@
     "eslint-config-skuba": "workspace:*",
     "execa": "^5.0.0",
     "fast-glob": "^3.3.2",
+    "find-up": "^5.0.0",
     "fs-extra": "^11.0.0",
     "function-arguments": "^1.0.9",
     "get-port": "^5.1.1",
diff --git a/packages/eslint-config-skuba/.prettierignore b/packages/eslint-config-skuba/.prettierignore
index e0ff288a5..80acfad52 100644
--- a/packages/eslint-config-skuba/.prettierignore
+++ b/packages/eslint-config-skuba/.prettierignore
@@ -5,4 +5,5 @@
 gantry*.yaml
 gantry*.yml
 pnpm-lock.yaml
+coverage
 # end managed by skuba
diff --git a/packages/skuba-dive/.dockerignore b/packages/skuba-dive/.dockerignore
index 0c55662e6..d428ab05d 100644
--- a/packages/skuba-dive/.dockerignore
+++ b/packages/skuba-dive/.dockerignore
@@ -15,9 +15,3 @@ node_modules*/
 npm-debug.log
 yarn-error.log
 # end managed by skuba
-
-# Ignore .npmrc. This is no longer managed by skuba as pnpm projects use a managed .npmrc.
-# IMPORTANT: if migrating to pnpm, remove this line and add an .npmrc IN THE SAME COMMIT.
-# You can use `skuba format` to generate the file or otherwise commit an empty file.
-# Doing so will conflict with a local .npmrc and make it more difficult to unintentionally commit auth secrets.
-.npmrc
diff --git a/packages/skuba-dive/.gitignore b/packages/skuba-dive/.gitignore
index 36b21a145..b77afb5f3 100644
--- a/packages/skuba-dive/.gitignore
+++ b/packages/skuba-dive/.gitignore
@@ -21,9 +21,3 @@ npm-debug.log
 package-lock.json
 yarn-error.log
 # end managed by skuba
-
-# Ignore .npmrc. This is no longer managed by skuba as pnpm projects use a managed .npmrc.
-# IMPORTANT: if migrating to pnpm, remove this line and add an .npmrc IN THE SAME COMMIT.
-# You can use `skuba format` to generate the file or otherwise commit an empty file.
-# Doing so will conflict with a local .npmrc and make it more difficult to unintentionally commit auth secrets.
-.npmrc
diff --git a/packages/skuba-dive/.prettierignore b/packages/skuba-dive/.prettierignore
index e0ff288a5..80acfad52 100644
--- a/packages/skuba-dive/.prettierignore
+++ b/packages/skuba-dive/.prettierignore
@@ -5,4 +5,5 @@
 gantry*.yaml
 gantry*.yml
 pnpm-lock.yaml
+coverage
 # end managed by skuba
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index c3de966f2..37977b876 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -38,9 +38,6 @@ importers:
       concurrently:
         specifier: ^8.0.0
         version: 8.2.2
-      detect-package-manager:
-        specifier: ^3.0.1
-        version: 3.0.1
       dotenv:
         specifier: ^16.0.0
         version: 16.4.5
@@ -65,6 +62,9 @@ importers:
       fast-glob:
         specifier: ^3.3.2
         version: 3.3.2
+      find-up:
+        specifier: ^5.0.0
+        version: 5.0.0
       fs-extra:
         specifier: ^11.0.0
         version: 11.2.0
@@ -88,10 +88,10 @@ importers:
         version: 1.25.7
       jest:
         specifier: ^29.0.1
-        version: 29.7.0(@types/node@20.12.6)(ts-node@10.9.2)
+        version: 29.7.0(@types/node@20.12.6)(ts-node@10.9.2(@types/node@20.12.6)(typescript@5.4.4))
       jest-watch-typeahead:
         specifier: ^2.1.1
-        version: 2.2.2(jest@29.7.0)
+        version: 2.2.2(jest@29.7.0(@types/node@20.12.6)(ts-node@10.9.2(@types/node@20.12.6)(typescript@5.4.4)))
       libnpmsearch:
         specifier: ^7.0.0
         version: 7.0.2
@@ -142,7 +142,7 @@ importers:
         version: 2.2.0
       ts-jest:
         specifier: ^29.1.0
-        version: 29.1.2(@babel/core@7.24.4)(@jest/types@29.6.3)(esbuild@0.20.2)(jest@29.7.0)(typescript@5.4.4)
+        version: 29.1.2(@babel/core@7.24.4)(@jest/types@29.6.3)(babel-jest@29.7.0(@babel/core@7.24.4))(esbuild@0.20.2)(jest@29.7.0(@types/node@20.12.6)(ts-node@10.9.2(@types/node@20.12.6)(typescript@5.4.4)))(typescript@5.4.4)
       ts-node:
         specifier: ^10.9.2
         version: 10.9.2(@types/node@20.12.6)(typescript@5.4.4)
@@ -170,7 +170,7 @@ importers:
         version: 2.27.1
       '@changesets/get-github-info':
         specifier: 0.6.0
-        version: 0.6.0
+        version: 0.6.0(encoding@0.1.13)
       '@jest/reporters':
         specifier: 29.7.0
         version: 29.7.0
@@ -254,16 +254,16 @@ importers:
         version: 8.56.7
       '@typescript-eslint/eslint-plugin':
         specifier: ^7.2.0
-        version: 7.6.0(@typescript-eslint/parser@7.6.0)(eslint@8.57.0)(typescript@5.3.3)
+        version: 7.6.0(@typescript-eslint/parser@7.6.0(eslint@8.57.0)(typescript@5.3.3))(eslint@8.57.0)(typescript@5.3.3)
       '@typescript-eslint/parser':
         specifier: ^7.2.0
         version: 7.6.0(eslint@8.57.0)(typescript@5.3.3)
       eslint-config-seek:
         specifier: ^13.0.0
-        version: 13.0.0(eslint@8.57.0)(jest@29.7.0)(typescript@5.3.3)
+        version: 13.0.0(eslint@8.57.0)(jest@29.7.0(@types/node@20.12.6)(ts-node@10.9.2(@types/node@20.12.6)(typescript@5.4.4)))(typescript@5.3.3)
       eslint-plugin-jest:
         specifier: ^27.9.0
-        version: 27.9.0(@typescript-eslint/eslint-plugin@7.6.0)(eslint@8.57.0)(jest@29.7.0)(typescript@5.3.3)
+        version: 27.9.0(@typescript-eslint/eslint-plugin@7.6.0(@typescript-eslint/parser@7.6.0(eslint@8.57.0)(typescript@5.3.3))(eslint@8.57.0)(typescript@5.3.3))(eslint@8.57.0)(jest@29.7.0(@types/node@20.12.6)(ts-node@10.9.2(@types/node@20.12.6)(typescript@5.4.4)))(typescript@5.3.3)
       eslint-plugin-tsdoc:
         specifier: ^0.2.14
         version: 0.2.17
@@ -2059,10 +2059,6 @@ packages:
     resolution: {integrity: sha512-qE3Veg1YXzGHQhlA6jzebZN2qVf6NX+A7m7qlhCGG30dJixrAQhYOsJjsnBjJkCSmuOPpCk30145fr8FV0bzog==}
     engines: {node: ^12.20.0 || ^14.13.1 || >=16.0.0}
 
-  detect-package-manager@3.0.1:
-    resolution: {integrity: sha512-qoHDH6+lMcpJPAScE7+5CYj91W0mxZNXTwZPrCqi1KMk+x+AoQScQ2V1QyqTln1rHU5Haq5fikvOGHv+leKD8A==}
-    engines: {node: '>=12'}
-
   devlop@1.1.0:
     resolution: {integrity: sha512-RWmIqhcFf1lRYBvNmr7qTNuyCt/7/ns2jbpp1+PalgE/rDQcBT0fioSMUpJ93irlUhC5hrg4cYqe6U+0ImW0rA==}
 
@@ -5808,10 +5804,10 @@ snapshots:
       fs-extra: 7.0.1
       semver: 7.6.0
 
-  '@changesets/get-github-info@0.6.0':
+  '@changesets/get-github-info@0.6.0(encoding@0.1.13)':
     dependencies:
       dataloader: 1.4.0
-      node-fetch: 2.7.0
+      node-fetch: 2.7.0(encoding@0.1.13)
     transitivePeerDependencies:
       - encoding
 
@@ -6047,7 +6043,7 @@ snapshots:
       jest-util: 29.7.0
       slash: 3.0.0
 
-  '@jest/core@29.7.0(ts-node@10.9.2)':
+  '@jest/core@29.7.0(ts-node@10.9.2(@types/node@20.12.6)(typescript@5.4.4))':
     dependencies:
       '@jest/console': 29.7.0
       '@jest/reporters': 29.7.0
@@ -6061,7 +6057,7 @@ snapshots:
       exit: 0.1.2
       graceful-fs: 4.2.11
       jest-changed-files: 29.7.0
-      jest-config: 29.7.0(@types/node@20.12.6)(ts-node@10.9.2)
+      jest-config: 29.7.0(@types/node@20.12.6)(ts-node@10.9.2(@types/node@20.12.6)(typescript@5.4.4))
       jest-haste-map: 29.7.0
       jest-message-util: 29.7.0
       jest-regex-util: 29.6.3
@@ -6433,7 +6429,7 @@ snapshots:
       '@pnpm/network.ca-file': 1.0.2
       config-chain: 1.1.13
 
-  '@semantic-release/commit-analyzer@11.1.0(semantic-release@22.0.12)':
+  '@semantic-release/commit-analyzer@11.1.0(semantic-release@22.0.12(typescript@5.4.4))':
     dependencies:
       conventional-changelog-angular: 7.0.0
       conventional-commits-filter: 4.0.0
@@ -6448,7 +6444,7 @@ snapshots:
 
   '@semantic-release/error@4.0.0': {}
 
-  '@semantic-release/github@9.2.6(semantic-release@22.0.12)':
+  '@semantic-release/github@9.2.6(semantic-release@22.0.12(typescript@5.4.4))':
     dependencies:
       '@octokit/core': 5.2.0
       '@octokit/plugin-paginate-rest': 9.2.1(@octokit/core@5.2.0)
@@ -6470,7 +6466,7 @@ snapshots:
     transitivePeerDependencies:
       - supports-color
 
-  '@semantic-release/npm@11.0.3(semantic-release@22.0.12)':
+  '@semantic-release/npm@11.0.3(semantic-release@22.0.12(typescript@5.4.4))':
     dependencies:
       '@semantic-release/error': 4.0.0
       aggregate-error: 5.0.0
@@ -6487,7 +6483,7 @@ snapshots:
       semver: 7.6.0
       tempy: 3.1.0
 
-  '@semantic-release/release-notes-generator@12.1.0(semantic-release@22.0.12)':
+  '@semantic-release/release-notes-generator@12.1.0(semantic-release@22.0.12(typescript@5.4.4))':
     dependencies:
       conventional-changelog-angular: 7.0.0
       conventional-changelog-writer: 7.0.1
@@ -6780,7 +6776,7 @@ snapshots:
     dependencies:
       '@types/yargs-parser': 21.0.3
 
-  '@typescript-eslint/eslint-plugin@7.6.0(@typescript-eslint/parser@7.6.0)(eslint@8.57.0)(typescript@5.3.3)':
+  '@typescript-eslint/eslint-plugin@7.6.0(@typescript-eslint/parser@7.6.0(eslint@8.57.0)(typescript@5.3.3))(eslint@8.57.0)(typescript@5.3.3)':
     dependencies:
       '@eslint-community/regexpp': 4.10.0
       '@typescript-eslint/parser': 7.6.0(eslint@8.57.0)(typescript@5.3.3)
@@ -6795,6 +6791,7 @@ snapshots:
       natural-compare: 1.4.0
       semver: 7.6.0
       ts-api-utils: 1.3.0(typescript@5.3.3)
+    optionalDependencies:
       typescript: 5.3.3
     transitivePeerDependencies:
       - supports-color
@@ -6807,6 +6804,7 @@ snapshots:
       '@typescript-eslint/visitor-keys': 7.6.0
       debug: 4.3.4
       eslint: 8.57.0
+    optionalDependencies:
       typescript: 5.3.3
     transitivePeerDependencies:
       - supports-color
@@ -6828,6 +6826,7 @@ snapshots:
       debug: 4.3.4
       eslint: 8.57.0
       ts-api-utils: 1.3.0(typescript@5.3.3)
+    optionalDependencies:
       typescript: 5.3.3
     transitivePeerDependencies:
       - supports-color
@@ -6845,6 +6844,7 @@ snapshots:
       is-glob: 4.0.3
       semver: 7.6.0
       tsutils: 3.21.0(typescript@5.3.3)
+    optionalDependencies:
       typescript: 5.3.3
     transitivePeerDependencies:
       - supports-color
@@ -6859,6 +6859,7 @@ snapshots:
       minimatch: 9.0.4
       semver: 7.6.0
       ts-api-utils: 1.3.0(typescript@5.3.3)
+    optionalDependencies:
       typescript: 5.3.3
     transitivePeerDependencies:
       - supports-color
@@ -6947,11 +6948,11 @@ snapshots:
       indent-string: 5.0.0
 
   ajv-formats@2.1.1(ajv@8.12.0):
-    dependencies:
+    optionalDependencies:
       ajv: 8.12.0
 
   ajv-formats@3.0.1(ajv@8.12.0):
-    dependencies:
+    optionalDependencies:
       ajv: 8.12.0
 
   ajv@6.12.6:
@@ -7468,17 +7469,18 @@ snapshots:
       js-yaml: 4.1.0
       parse-json: 5.2.0
       path-type: 4.0.0
+    optionalDependencies:
       typescript: 5.4.4
 
   crc-32@1.2.2: {}
 
-  create-jest@29.7.0(@types/node@20.12.6)(ts-node@10.9.2):
+  create-jest@29.7.0(@types/node@20.12.6)(ts-node@10.9.2(@types/node@20.12.6)(typescript@5.4.4)):
     dependencies:
       '@jest/types': 29.6.3
       chalk: 4.1.2
       exit: 0.1.2
       graceful-fs: 4.2.11
-      jest-config: 29.7.0(@types/node@20.12.6)(ts-node@10.9.2)
+      jest-config: 29.7.0(@types/node@20.12.6)(ts-node@10.9.2(@types/node@20.12.6)(typescript@5.4.4))
       jest-util: 29.7.0
       prompts: 2.4.2
     transitivePeerDependencies:
@@ -7617,10 +7619,6 @@ snapshots:
 
   detect-newline@4.0.1: {}
 
-  detect-package-manager@3.0.1:
-    dependencies:
-      execa: 5.1.1
-
   devlop@1.1.0:
     dependencies:
       dequal: 2.0.3
@@ -7851,19 +7849,19 @@ snapshots:
     dependencies:
       eslint: 8.57.0
 
-  eslint-config-seek@13.0.0(eslint@8.57.0)(jest@29.7.0)(typescript@5.3.3):
+  eslint-config-seek@13.0.0(eslint@8.57.0)(jest@29.7.0(@types/node@20.12.6)(ts-node@10.9.2(@types/node@20.12.6)(typescript@5.4.4)))(typescript@5.3.3):
     dependencies:
       '@babel/core': 7.24.4
       '@babel/eslint-parser': 7.24.1(@babel/core@7.24.4)(eslint@8.57.0)
       '@babel/preset-react': 7.24.1(@babel/core@7.24.4)
       '@finsit/eslint-plugin-cypress': 3.1.1(eslint@8.57.0)
-      '@typescript-eslint/eslint-plugin': 7.6.0(@typescript-eslint/parser@7.6.0)(eslint@8.57.0)(typescript@5.3.3)
+      '@typescript-eslint/eslint-plugin': 7.6.0(@typescript-eslint/parser@7.6.0(eslint@8.57.0)(typescript@5.3.3))(eslint@8.57.0)(typescript@5.3.3)
       '@typescript-eslint/parser': 7.6.0(eslint@8.57.0)(typescript@5.3.3)
       eslint: 8.57.0
       eslint-config-prettier: 8.10.0(eslint@8.57.0)
-      eslint-import-resolver-typescript: 3.5.5(@typescript-eslint/parser@7.6.0)(eslint-plugin-import@2.29.1)(eslint@8.57.0)
-      eslint-plugin-import: 2.29.1(@typescript-eslint/parser@7.6.0)(eslint-import-resolver-typescript@3.5.5)(eslint@8.57.0)
-      eslint-plugin-jest: 27.9.0(@typescript-eslint/eslint-plugin@7.6.0)(eslint@8.57.0)(jest@29.7.0)(typescript@5.3.3)
+      eslint-import-resolver-typescript: 3.5.5(@typescript-eslint/parser@7.6.0(eslint@8.57.0)(typescript@5.3.3))(eslint-plugin-import@2.29.1)(eslint@8.57.0)
+      eslint-plugin-import: 2.29.1(@typescript-eslint/parser@7.6.0(eslint@8.57.0)(typescript@5.3.3))(eslint-import-resolver-typescript@3.5.5)(eslint@8.57.0)
+      eslint-plugin-jest: 27.9.0(@typescript-eslint/eslint-plugin@7.6.0(@typescript-eslint/parser@7.6.0(eslint@8.57.0)(typescript@5.3.3))(eslint@8.57.0)(typescript@5.3.3))(eslint@8.57.0)(jest@29.7.0(@types/node@20.12.6)(ts-node@10.9.2(@types/node@20.12.6)(typescript@5.4.4)))(typescript@5.3.3)
       eslint-plugin-react: 7.34.1(eslint@8.57.0)
       eslint-plugin-react-hooks: 4.6.0(eslint@8.57.0)
       eslint-plugin-rulesdir: 0.2.2
@@ -7883,13 +7881,13 @@ snapshots:
     transitivePeerDependencies:
       - supports-color
 
-  eslint-import-resolver-typescript@3.5.5(@typescript-eslint/parser@7.6.0)(eslint-plugin-import@2.29.1)(eslint@8.57.0):
+  eslint-import-resolver-typescript@3.5.5(@typescript-eslint/parser@7.6.0(eslint@8.57.0)(typescript@5.3.3))(eslint-plugin-import@2.29.1)(eslint@8.57.0):
     dependencies:
       debug: 4.3.4
       enhanced-resolve: 5.15.0
       eslint: 8.57.0
-      eslint-module-utils: 2.8.1(@typescript-eslint/parser@7.6.0)(eslint-import-resolver-node@0.3.9)(eslint-import-resolver-typescript@3.5.5)(eslint@8.57.0)
-      eslint-plugin-import: 2.29.1(@typescript-eslint/parser@7.6.0)(eslint-import-resolver-typescript@3.5.5)(eslint@8.57.0)
+      eslint-module-utils: 2.8.1(@typescript-eslint/parser@7.6.0(eslint@8.57.0)(typescript@5.3.3))(eslint-import-resolver-node@0.3.9)(eslint-import-resolver-typescript@3.5.5(@typescript-eslint/parser@7.6.0(eslint@8.57.0)(typescript@5.3.3))(eslint-plugin-import@2.29.1)(eslint@8.57.0))(eslint@8.57.0)
+      eslint-plugin-import: 2.29.1(@typescript-eslint/parser@7.6.0(eslint@8.57.0)(typescript@5.3.3))(eslint-import-resolver-typescript@3.5.5)(eslint@8.57.0)
       get-tsconfig: 4.7.3
       globby: 13.2.2
       is-core-module: 2.13.1
@@ -7901,19 +7899,19 @@ snapshots:
       - eslint-import-resolver-webpack
       - supports-color
 
-  eslint-module-utils@2.8.1(@typescript-eslint/parser@7.6.0)(eslint-import-resolver-node@0.3.9)(eslint-import-resolver-typescript@3.5.5)(eslint@8.57.0):
+  eslint-module-utils@2.8.1(@typescript-eslint/parser@7.6.0(eslint@8.57.0)(typescript@5.3.3))(eslint-import-resolver-node@0.3.9)(eslint-import-resolver-typescript@3.5.5(@typescript-eslint/parser@7.6.0(eslint@8.57.0)(typescript@5.3.3))(eslint-plugin-import@2.29.1)(eslint@8.57.0))(eslint@8.57.0):
     dependencies:
-      '@typescript-eslint/parser': 7.6.0(eslint@8.57.0)(typescript@5.3.3)
       debug: 3.2.7
+    optionalDependencies:
+      '@typescript-eslint/parser': 7.6.0(eslint@8.57.0)(typescript@5.3.3)
       eslint: 8.57.0
       eslint-import-resolver-node: 0.3.9
-      eslint-import-resolver-typescript: 3.5.5(@typescript-eslint/parser@7.6.0)(eslint-plugin-import@2.29.1)(eslint@8.57.0)
+      eslint-import-resolver-typescript: 3.5.5(@typescript-eslint/parser@7.6.0(eslint@8.57.0)(typescript@5.3.3))(eslint-plugin-import@2.29.1)(eslint@8.57.0)
     transitivePeerDependencies:
       - supports-color
 
-  eslint-plugin-import@2.29.1(@typescript-eslint/parser@7.6.0)(eslint-import-resolver-typescript@3.5.5)(eslint@8.57.0):
+  eslint-plugin-import@2.29.1(@typescript-eslint/parser@7.6.0(eslint@8.57.0)(typescript@5.3.3))(eslint-import-resolver-typescript@3.5.5)(eslint@8.57.0):
     dependencies:
-      '@typescript-eslint/parser': 7.6.0(eslint@8.57.0)(typescript@5.3.3)
       array-includes: 3.1.8
       array.prototype.findlastindex: 1.2.5
       array.prototype.flat: 1.3.2
@@ -7922,7 +7920,7 @@ snapshots:
       doctrine: 2.1.0
       eslint: 8.57.0
       eslint-import-resolver-node: 0.3.9
-      eslint-module-utils: 2.8.1(@typescript-eslint/parser@7.6.0)(eslint-import-resolver-node@0.3.9)(eslint-import-resolver-typescript@3.5.5)(eslint@8.57.0)
+      eslint-module-utils: 2.8.1(@typescript-eslint/parser@7.6.0(eslint@8.57.0)(typescript@5.3.3))(eslint-import-resolver-node@0.3.9)(eslint-import-resolver-typescript@3.5.5(@typescript-eslint/parser@7.6.0(eslint@8.57.0)(typescript@5.3.3))(eslint-plugin-import@2.29.1)(eslint@8.57.0))(eslint@8.57.0)
       hasown: 2.0.2
       is-core-module: 2.13.1
       is-glob: 4.0.3
@@ -7932,17 +7930,20 @@ snapshots:
       object.values: 1.2.0
       semver: 6.3.1
       tsconfig-paths: 3.15.0
+    optionalDependencies:
+      '@typescript-eslint/parser': 7.6.0(eslint@8.57.0)(typescript@5.3.3)
     transitivePeerDependencies:
       - eslint-import-resolver-typescript
       - eslint-import-resolver-webpack
       - supports-color
 
-  eslint-plugin-jest@27.9.0(@typescript-eslint/eslint-plugin@7.6.0)(eslint@8.57.0)(jest@29.7.0)(typescript@5.3.3):
+  eslint-plugin-jest@27.9.0(@typescript-eslint/eslint-plugin@7.6.0(@typescript-eslint/parser@7.6.0(eslint@8.57.0)(typescript@5.3.3))(eslint@8.57.0)(typescript@5.3.3))(eslint@8.57.0)(jest@29.7.0(@types/node@20.12.6)(ts-node@10.9.2(@types/node@20.12.6)(typescript@5.4.4)))(typescript@5.3.3):
     dependencies:
-      '@typescript-eslint/eslint-plugin': 7.6.0(@typescript-eslint/parser@7.6.0)(eslint@8.57.0)(typescript@5.3.3)
       '@typescript-eslint/utils': 5.62.0(eslint@8.57.0)(typescript@5.3.3)
       eslint: 8.57.0
-      jest: 29.7.0(@types/node@20.12.6)(ts-node@10.9.2)
+    optionalDependencies:
+      '@typescript-eslint/eslint-plugin': 7.6.0(@typescript-eslint/parser@7.6.0(eslint@8.57.0)(typescript@5.3.3))(eslint@8.57.0)(typescript@5.3.3)
+      jest: 29.7.0(@types/node@20.12.6)(ts-node@10.9.2(@types/node@20.12.6)(typescript@5.4.4))
     transitivePeerDependencies:
       - supports-color
       - typescript
@@ -8926,16 +8927,16 @@ snapshots:
       - babel-plugin-macros
       - supports-color
 
-  jest-cli@29.7.0(@types/node@20.12.6)(ts-node@10.9.2):
+  jest-cli@29.7.0(@types/node@20.12.6)(ts-node@10.9.2(@types/node@20.12.6)(typescript@5.4.4)):
     dependencies:
-      '@jest/core': 29.7.0(ts-node@10.9.2)
+      '@jest/core': 29.7.0(ts-node@10.9.2(@types/node@20.12.6)(typescript@5.4.4))
       '@jest/test-result': 29.7.0
       '@jest/types': 29.6.3
       chalk: 4.1.2
-      create-jest: 29.7.0(@types/node@20.12.6)(ts-node@10.9.2)
+      create-jest: 29.7.0(@types/node@20.12.6)(ts-node@10.9.2(@types/node@20.12.6)(typescript@5.4.4))
       exit: 0.1.2
       import-local: 3.1.0
-      jest-config: 29.7.0(@types/node@20.12.6)(ts-node@10.9.2)
+      jest-config: 29.7.0(@types/node@20.12.6)(ts-node@10.9.2(@types/node@20.12.6)(typescript@5.4.4))
       jest-util: 29.7.0
       jest-validate: 29.7.0
       yargs: 17.7.2
@@ -8945,12 +8946,11 @@ snapshots:
       - supports-color
       - ts-node
 
-  jest-config@29.7.0(@types/node@20.12.6)(ts-node@10.9.2):
+  jest-config@29.7.0(@types/node@20.12.6)(ts-node@10.9.2(@types/node@20.12.6)(typescript@5.4.4)):
     dependencies:
       '@babel/core': 7.24.4
       '@jest/test-sequencer': 29.7.0
       '@jest/types': 29.6.3
-      '@types/node': 20.12.6
       babel-jest: 29.7.0(@babel/core@7.24.4)
       chalk: 4.1.2
       ci-info: 3.9.0
@@ -8970,6 +8970,8 @@ snapshots:
       pretty-format: 29.7.0
       slash: 3.0.0
       strip-json-comments: 3.1.1
+    optionalDependencies:
+      '@types/node': 20.12.6
       ts-node: 10.9.2(@types/node@20.12.6)(typescript@5.4.4)
     transitivePeerDependencies:
       - babel-plugin-macros
@@ -9052,7 +9054,7 @@ snapshots:
       jest-util: 29.7.0
 
   jest-pnp-resolver@1.2.3(jest-resolve@29.7.0):
-    dependencies:
+    optionalDependencies:
       jest-resolve: 29.7.0
 
   jest-regex-util@29.6.3: {}
@@ -9172,11 +9174,11 @@ snapshots:
       leven: 3.1.0
       pretty-format: 29.7.0
 
-  jest-watch-typeahead@2.2.2(jest@29.7.0):
+  jest-watch-typeahead@2.2.2(jest@29.7.0(@types/node@20.12.6)(ts-node@10.9.2(@types/node@20.12.6)(typescript@5.4.4))):
     dependencies:
       ansi-escapes: 6.2.1
       chalk: 5.3.0
-      jest: 29.7.0(@types/node@20.12.6)(ts-node@10.9.2)
+      jest: 29.7.0(@types/node@20.12.6)(ts-node@10.9.2(@types/node@20.12.6)(typescript@5.4.4))
       jest-regex-util: 29.6.3
       jest-watcher: 29.7.0
       slash: 5.1.0
@@ -9201,12 +9203,12 @@ snapshots:
       merge-stream: 2.0.0
       supports-color: 8.1.1
 
-  jest@29.7.0(@types/node@20.12.6)(ts-node@10.9.2):
+  jest@29.7.0(@types/node@20.12.6)(ts-node@10.9.2(@types/node@20.12.6)(typescript@5.4.4)):
     dependencies:
-      '@jest/core': 29.7.0(ts-node@10.9.2)
+      '@jest/core': 29.7.0(ts-node@10.9.2(@types/node@20.12.6)(typescript@5.4.4))
       '@jest/types': 29.6.3
       import-local: 3.1.0
-      jest-cli: 29.7.0(@types/node@20.12.6)(ts-node@10.9.2)
+      jest-cli: 29.7.0(@types/node@20.12.6)(ts-node@10.9.2(@types/node@20.12.6)(typescript@5.4.4))
     transitivePeerDependencies:
       - '@types/node'
       - babel-plugin-macros
@@ -9994,9 +9996,11 @@ snapshots:
       emojilib: 2.4.0
       skin-tone: 2.0.0
 
-  node-fetch@2.7.0:
+  node-fetch@2.7.0(encoding@0.1.13):
     dependencies:
       whatwg-url: 5.0.0
+    optionalDependencies:
+      encoding: 0.1.13
 
   node-int64@0.4.0: {}
 
@@ -10307,9 +10311,10 @@ snapshots:
 
   prettier-plugin-packagejson@2.4.14(prettier@3.2.5):
     dependencies:
-      prettier: 3.2.5
       sort-package-json: 2.10.0
       synckit: 0.9.0
+    optionalDependencies:
+      prettier: 3.2.5
 
   prettier@2.8.8: {}
 
@@ -10791,11 +10796,11 @@ snapshots:
 
   semantic-release@22.0.12(typescript@5.4.4):
     dependencies:
-      '@semantic-release/commit-analyzer': 11.1.0(semantic-release@22.0.12)
+      '@semantic-release/commit-analyzer': 11.1.0(semantic-release@22.0.12(typescript@5.4.4))
       '@semantic-release/error': 4.0.0
-      '@semantic-release/github': 9.2.6(semantic-release@22.0.12)
-      '@semantic-release/npm': 11.0.3(semantic-release@22.0.12)
-      '@semantic-release/release-notes-generator': 12.1.0(semantic-release@22.0.12)
+      '@semantic-release/github': 9.2.6(semantic-release@22.0.12(typescript@5.4.4))
+      '@semantic-release/npm': 11.0.3(semantic-release@22.0.12(typescript@5.4.4))
+      '@semantic-release/release-notes-generator': 12.1.0(semantic-release@22.0.12(typescript@5.4.4))
       aggregate-error: 5.0.0
       cosmiconfig: 8.3.6(typescript@5.4.4)
       debug: 4.3.4
@@ -11296,14 +11301,11 @@ snapshots:
 
   ts-dedent@2.2.0: {}
 
-  ts-jest@29.1.2(@babel/core@7.24.4)(@jest/types@29.6.3)(esbuild@0.20.2)(jest@29.7.0)(typescript@5.4.4):
+  ts-jest@29.1.2(@babel/core@7.24.4)(@jest/types@29.6.3)(babel-jest@29.7.0(@babel/core@7.24.4))(esbuild@0.20.2)(jest@29.7.0(@types/node@20.12.6)(ts-node@10.9.2(@types/node@20.12.6)(typescript@5.4.4)))(typescript@5.4.4):
     dependencies:
-      '@babel/core': 7.24.4
-      '@jest/types': 29.6.3
       bs-logger: 0.2.6
-      esbuild: 0.20.2
       fast-json-stable-stringify: 2.1.0
-      jest: 29.7.0(@types/node@20.12.6)(ts-node@10.9.2)
+      jest: 29.7.0(@types/node@20.12.6)(ts-node@10.9.2(@types/node@20.12.6)(typescript@5.4.4))
       jest-util: 29.7.0
       json5: 2.2.3
       lodash.memoize: 4.1.2
@@ -11311,6 +11313,11 @@ snapshots:
       semver: 7.6.0
       typescript: 5.4.4
       yargs-parser: 21.1.1
+    optionalDependencies:
+      '@babel/core': 7.24.4
+      '@jest/types': 29.6.3
+      babel-jest: 29.7.0(@babel/core@7.24.4)
+      esbuild: 0.20.2
 
   ts-node-dev@2.0.0(@types/node@20.12.6)(typescript@5.4.4):
     dependencies:
diff --git a/src/cli/__snapshots__/format.int.test.ts.snap b/src/cli/__snapshots__/format.int.test.ts.snap
index c8d152272..2354b913b 100644
--- a/src/cli/__snapshots__/format.int.test.ts.snap
+++ b/src/cli/__snapshots__/format.int.test.ts.snap
@@ -22,6 +22,7 @@ skuba update complete.
 Refreshed .eslintignore. refresh-config-files
 Refreshed .gitignore. refresh-config-files
 Refreshed .prettierignore. refresh-config-files
+Refreshed .npmrc. refresh-config-files
 Refreshed .dockerignore. refresh-config-files
 Processed skuba lints in <random>s.
 
@@ -94,6 +95,7 @@ skuba update complete.
 Refreshed .eslintignore. refresh-config-files
 Refreshed .gitignore. refresh-config-files
 Refreshed .prettierignore. refresh-config-files
+Refreshed .npmrc. refresh-config-files
 Refreshed .dockerignore. refresh-config-files
 Processed skuba lints in <random>s.
 
@@ -108,7 +110,7 @@ Prettier
 Initialising Prettier...
 Detected project root: <random>
 Discovering files...
-Discovered 10 files.
+Discovered 11 files.
 Formatting files...
 .dockerignore
   parser: -
@@ -116,6 +118,8 @@ Formatting files...
   parser: -
 .gitignore
   parser: -
+.npmrc
+  parser: -
 .prettierignore
   parser: -
 b.md
@@ -161,6 +165,7 @@ skuba update complete.
 Refreshed .eslintignore. refresh-config-files
 Refreshed .gitignore. refresh-config-files
 Refreshed .prettierignore. refresh-config-files
+Refreshed .npmrc. refresh-config-files
 Refreshed .dockerignore. refresh-config-files
 Processed skuba lints in <random>s.
 
@@ -199,6 +204,7 @@ skuba update complete.
 Refreshed .eslintignore. refresh-config-files
 Refreshed .gitignore. refresh-config-files
 Refreshed .prettierignore. refresh-config-files
+Refreshed .npmrc. refresh-config-files
 Processed skuba lints in <random>s.
 
 ESLint
diff --git a/src/cli/__snapshots__/lint.int.test.ts.snap b/src/cli/__snapshots__/lint.int.test.ts.snap
index dbd0f70a6..e0bcabae7 100644
--- a/src/cli/__snapshots__/lint.int.test.ts.snap
+++ b/src/cli/__snapshots__/lint.int.test.ts.snap
@@ -27,7 +27,7 @@ tsc      │ tsc --noEmit exited with code 0
 skuba    │ Processed skuba lints in <random>s.
 ESLint, Prettier found issues that require triage.
 
-Try running yarn skuba format to fix them.
+Try running pnpm exec skuba format to fix them.
 "
 `;
 
@@ -72,11 +72,11 @@ ESLint   │ Processed 2 files in <random>s.
 Prettier │ Processed 6 files in <random>s.
 tsc      │ TSFILE: <random>/lib/tsconfig.tsbuildinfo
 tsc      │ tsc --noEmit exited with code 0
-skuba    │ skuba has patches to apply. Run yarn skuba format to run them. skuba-patches
+skuba    │ skuba has patches to apply. Run pnpm exec skuba format to run them. skuba-patches
 skuba    │ Processed skuba lints in <random>s.
 skuba found issues that require triage.
 
-Try running yarn skuba format to fix them.
+Try running pnpm exec skuba format to fix them.
 "
 `;
 
@@ -90,7 +90,7 @@ Options: { context: 'skuba-lint', scopeContextToStep: true, style: 'error' }
 **skuba**
 
 \`\`\`term
-<random>/package.json skuba has patches to apply. Run yarn skuba format to run them.
+<random>/package.json skuba has patches to apply. Run pnpm exec skuba format to run them.
 \`\`\`
 ",
 ]
@@ -106,7 +106,7 @@ ESLint   │ ○ d.js
 Prettier │ Initialising Prettier...
 Prettier │ Detected project root: <random>
 Prettier │ Discovering files...
-Prettier │ Discovered 10 files.
+Prettier │ Discovered 11 files.
 Prettier │ Linting files...
 Prettier │ .dockerignore
 Prettier │   parser: -
@@ -114,6 +114,8 @@ Prettier │ .eslintignore
 Prettier │   parser: -
 Prettier │ .gitignore
 Prettier │   parser: -
+Prettier │ .npmrc
+Prettier │   parser: -
 Prettier │ .prettierignore
 Prettier │   parser: -
 Prettier │ b.md
@@ -204,7 +206,7 @@ tsc      │ tsc --noEmit exited with code 2
 skuba    │ Processed skuba lints in <random>s.
 ESLint, Prettier, tsc found issues that require triage.
 
-Try running yarn skuba format to fix them.
+Try running pnpm exec skuba format to fix them.
 "
 `;
 
diff --git a/src/cli/configure/analysis/__snapshots__/project.test.ts.snap b/src/cli/configure/analysis/__snapshots__/project.test.ts.snap
index 0e1fe4e3a..d8d2d395f 100644
--- a/src/cli/configure/analysis/__snapshots__/project.test.ts.snap
+++ b/src/cli/configure/analysis/__snapshots__/project.test.ts.snap
@@ -91,6 +91,7 @@ yarn-error.log
 gantry*.yaml
 gantry*.yml
 pnpm-lock.yaml
+coverage
 # end managed by skuba
 ",
     "operation": "A",
diff --git a/src/utils/packageManager.test.ts b/src/utils/packageManager.test.ts
index 4ca626b2e..7964de71f 100644
--- a/src/utils/packageManager.test.ts
+++ b/src/utils/packageManager.test.ts
@@ -1,6 +1,6 @@
-const detect = jest.fn();
+const findUp = jest.fn();
 
-jest.mock('detect-package-manager', () => ({ detect }));
+jest.mock('find-up', () => findUp);
 
 import { detectPackageManager } from './packageManager';
 
@@ -16,7 +16,54 @@ afterEach(stdoutMock.mockReset);
 
 describe('detectPackageManager', () => {
   it('detects pnpm', async () => {
-    detect.mockResolvedValue('pnpm');
+    findUp.mockImplementation((file: string) =>
+      Promise.resolve(
+        file === 'pnpm-lock.yaml' ? '/root/pnpm-lock.yaml' : undefined,
+      ),
+    );
+
+    await expect(detectPackageManager()).resolves.toMatchInlineSnapshot(`
+      {
+        "command": "pnpm",
+        "exec": "pnpm exec",
+        "install": "pnpm install",
+        "runSilent": "pnpm --silent run",
+        "update": "pnpm update",
+      }
+    `);
+
+    expect(stdout()).toBe('');
+  });
+
+  it('preferences yarn on confusing project setups with sibling lockfiles', async () => {
+    findUp.mockImplementation((file: string) =>
+      Promise.resolve(
+        file === 'pnpm-lock.yaml' ? '/root/pnpm-lock.yaml' : '/root/yarn.lock',
+      ),
+    );
+
+    await expect(detectPackageManager()).resolves.toMatchInlineSnapshot(`
+      {
+        "command": "yarn",
+        "exec": "yarn",
+        "install": "yarn install",
+        "runSilent": "yarn -s",
+        "update": "yarn upgrade",
+      }
+    `);
+
+    expect(stdout()).toBe('');
+  });
+
+  it('preferences the closest lockfile if at different levels', async () => {
+    findUp.mockImplementation((file: string) =>
+      Promise.resolve(
+        file === 'pnpm-lock.yaml'
+          ? '/root/a/b/c/pnpm-lock.yaml'
+          : '/root/yarn.lock',
+      ),
+    );
+
     await expect(detectPackageManager()).resolves.toMatchInlineSnapshot(`
       {
         "command": "pnpm",
@@ -31,7 +78,9 @@ describe('detectPackageManager', () => {
   });
 
   it('detects yarn', async () => {
-    detect.mockResolvedValue('yarn');
+    findUp.mockImplementation((file: string) =>
+      Promise.resolve(file === 'yarn.lock' ? '/root/yarn.lock' : undefined),
+    );
 
     await expect(detectPackageManager()).resolves.toMatchInlineSnapshot(`
       {
@@ -47,7 +96,7 @@ describe('detectPackageManager', () => {
   });
 
   it('defaults on unrecognised package manager', async () => {
-    detect.mockResolvedValue('npm');
+    findUp.mockResolvedValue(undefined);
 
     await expect(detectPackageManager()).resolves.toMatchInlineSnapshot(`
       {
@@ -62,7 +111,7 @@ describe('detectPackageManager', () => {
     expect(stdout()).toBe(
       [
         'Failed to detect package manager; defaulting to yarn.',
-        'Expected pnpm|yarn, received npm',
+        'No package manager lockfile found.',
       ].join('\n'),
     );
   });
@@ -70,7 +119,7 @@ describe('detectPackageManager', () => {
   it('defaults on detection failure', async () => {
     const message = 'Badness!';
 
-    detect.mockRejectedValue(new Error(message));
+    findUp.mockRejectedValue(new Error(message));
 
     await expect(detectPackageManager()).resolves.toMatchInlineSnapshot(`
       {
diff --git a/src/utils/packageManager.ts b/src/utils/packageManager.ts
index 7ce8d3cff..991223ccd 100644
--- a/src/utils/packageManager.ts
+++ b/src/utils/packageManager.ts
@@ -1,6 +1,6 @@
-import { detect } from 'detect-package-manager';
+import findUp from 'find-up';
 import isInstalledGlobally from 'is-installed-globally';
-import { ZodError, z } from 'zod';
+import { z } from 'zod';
 
 import { log } from './logging';
 
@@ -39,11 +39,17 @@ export const detectPackageManager = async (
 ): Promise<PackageManagerConfig> => {
   let packageManager: PackageManager = DEFAULT_PACKAGE_MANAGER;
 
-  let raw: string | undefined;
   try {
-    raw = await detect({ cwd, includeGlobalBun: false });
+    const [yarnDepth, pnpmDepth] = await Promise.all([
+      findDepth('yarn.lock', cwd),
+      findDepth('pnpm-lock.yaml', cwd),
+    ]);
 
-    packageManager = packageManagerSchema.parse(raw);
+    if (yarnDepth === undefined && pnpmDepth === undefined) {
+      throw new Error('No package manager lockfile found.');
+    }
+
+    packageManager = (pnpmDepth ?? -1) > (yarnDepth ?? -1) ? 'pnpm' : 'yarn';
   } catch (err) {
     log.warn(
       `Failed to detect package manager; defaulting to ${log.bold(
@@ -53,11 +59,6 @@ export const detectPackageManager = async (
     log.subtle(
       (() => {
         switch (true) {
-          case err instanceof ZodError:
-            return `Expected ${Object.keys(PACKAGE_MANAGERS).join(
-              '|',
-            )}, received ${raw}`;
-
           case err instanceof Error:
             return err.message;
 
@@ -71,6 +72,11 @@ export const detectPackageManager = async (
   return configForPackageManager(packageManager);
 };
 
+const findDepth = async (filename: string, cwd?: string) => {
+  const path = await findUp(filename, { cwd });
+  return path ? path.split('/').length : undefined;
+};
+
 export type PackageManager = z.infer<typeof packageManagerSchema>;
 
 export const packageManagerSchema = z
diff --git a/template/base/_.prettierignore b/template/base/_.prettierignore
index e0ff288a5..80acfad52 100644
--- a/template/base/_.prettierignore
+++ b/template/base/_.prettierignore
@@ -5,4 +5,5 @@
 gantry*.yaml
 gantry*.yml
 pnpm-lock.yaml
+coverage
 # end managed by skuba