diff --git a/.changeset/bun-1-4-2-runtime.md b/.changeset/bun-1-4-2-runtime.md
new file mode 100644
index 000000000..3b3bbf48d
--- /dev/null
+++ b/.changeset/bun-1-4-2-runtime.md
@@ -0,0 +1,5 @@
+---
+"hunkdiff": patch
+---
+
+Upgrade the bundled Bun runtime to 1.4.2 for lower memory use and runtime fixes.
diff --git a/.github/workflows/benchmarks.yml b/.github/workflows/benchmarks.yml
index 0b2ddb129..8f3f3f5e6 100644
--- a/.github/workflows/benchmarks.yml
+++ b/.github/workflows/benchmarks.yml
@@ -29,7 +29,7 @@ jobs:
       - name: Set up Bun
         uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
         with:
-          bun-version: 1.3.14
+          bun-version: 1.4.2
 
       - name: Install dependencies
         run: bun install --frozen-lockfile
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index eabc5cf5d..9b7a3a389 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -41,7 +41,7 @@ jobs:
       - name: Set up Bun
         uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
         with:
-          bun-version: 1.3.14
+          bun-version: 1.4.2
 
       - name: Set up Node
         uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
@@ -104,7 +104,7 @@ jobs:
       - name: Set up Bun
         uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
         with:
-          bun-version: 1.3.14
+          bun-version: 1.4.2
 
       - name: Install dependencies
         run: bun install --frozen-lockfile
@@ -129,7 +129,7 @@ jobs:
       - name: Set up Bun
         uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
         with:
-          bun-version: 1.3.14
+          bun-version: 1.4.2
 
       - name: Set up Node
         uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
@@ -182,7 +182,7 @@ jobs:
       - name: Set up Bun
         uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
         with:
-          bun-version: 1.3.14
+          bun-version: 1.4.2
 
       - name: Set up Node
         uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
@@ -218,7 +218,7 @@ jobs:
       - name: Set up Bun
         uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
         with:
-          bun-version: 1.3.14
+          bun-version: 1.4.2
 
       - name: Install dependencies
         run: bun install --frozen-lockfile
diff --git a/.github/workflows/install-vm.yml b/.github/workflows/install-vm.yml
index 5625ec850..5b2ff8e42 100644
--- a/.github/workflows/install-vm.yml
+++ b/.github/workflows/install-vm.yml
@@ -31,7 +31,7 @@ jobs:
       - name: Set up Bun
         uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
         with:
-          bun-version: 1.3.14
+          bun-version: 1.4.2
 
       - name: Install ordinary development dependencies
         run: bun install --frozen-lockfile
diff --git a/.github/workflows/pr-ci.yml b/.github/workflows/pr-ci.yml
index 86b125a71..d665bb595 100644
--- a/.github/workflows/pr-ci.yml
+++ b/.github/workflows/pr-ci.yml
@@ -41,7 +41,7 @@ jobs:
       - name: Set up Bun
         uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
         with:
-          bun-version: 1.3.14
+          bun-version: 1.4.2
 
       - name: Verify release-note changeset
         env:
@@ -64,7 +64,7 @@ jobs:
       - name: Set up Bun
         uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
         with:
-          bun-version: 1.3.14
+          bun-version: 1.4.2
 
       - name: Set up Node
         uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
@@ -117,7 +117,7 @@ jobs:
       - name: Set up Bun
         uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
         with:
-          bun-version: 1.3.14
+          bun-version: 1.4.2
 
       - name: Install dependencies
         run: bun install --frozen-lockfile
@@ -142,7 +142,7 @@ jobs:
       - name: Set up Bun
         uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
         with:
-          bun-version: 1.3.14
+          bun-version: 1.4.2
 
       - name: Set up Node
         uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
diff --git a/.github/workflows/release-prebuilt-npm.yml b/.github/workflows/release-prebuilt-npm.yml
index 0dc76a89c..67681d104 100644
--- a/.github/workflows/release-prebuilt-npm.yml
+++ b/.github/workflows/release-prebuilt-npm.yml
@@ -48,7 +48,7 @@ jobs:
       - name: Set up Bun
         uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
         with:
-          bun-version: 1.3.14
+          bun-version: 1.4.2
 
       - name: Resolve npm dist-tag and GitHub latest status
         id: resolve
@@ -87,7 +87,7 @@ jobs:
       - name: Set up Bun
         uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
         with:
-          bun-version: 1.3.14
+          bun-version: 1.4.2
 
       - name: Install dependencies
         run: bun install --frozen-lockfile
@@ -155,7 +155,7 @@ jobs:
       - name: Set up Bun
         uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
         with:
-          bun-version: 1.3.14
+          bun-version: 1.4.2
 
       - name: Install dependencies
         run: bun install --frozen-lockfile
@@ -195,7 +195,7 @@ jobs:
       - name: Set up Bun
         uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
         with:
-          bun-version: 1.3.14
+          bun-version: 1.4.2
 
       - name: Set up Node
         uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
@@ -255,7 +255,7 @@ jobs:
       - name: Set up Bun
         uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
         with:
-          bun-version: 1.3.14
+          bun-version: 1.4.2
 
       - name: Set up Node
         uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
@@ -302,7 +302,7 @@ jobs:
       - name: Set up Bun
         uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
         with:
-          bun-version: 1.3.14
+          bun-version: 1.4.2
 
       - name: Download platform artifacts
         uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
diff --git a/.github/workflows/website.yml b/.github/workflows/website.yml
index 139ee2836..680e88f13 100644
--- a/.github/workflows/website.yml
+++ b/.github/workflows/website.yml
@@ -24,7 +24,7 @@ jobs:
       - name: Set up Bun
         uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
         with:
-          bun-version: 1.3.14
+          bun-version: 1.4.2
 
       - name: Install repository dependencies
         run: bun install --frozen-lockfile
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 84b7d8c4f..41094acba 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -71,7 +71,7 @@ Keep the change focused on one user problem. Before adding another helper, state
 
 Requirements:
 
-- Bun 1.3.14+
+- Bun 1.4.2+
 - Node.js 22+ for npm package verification and release tasks
 - Git
 - macOS, Linux, or Windows
diff --git a/bun.lock b/bun.lock
index 333ce24c8..8293d3e78 100644
--- a/bun.lock
+++ b/bun.lock
@@ -5,7 +5,7 @@
     "": {
       "name": "hunk",
       "dependencies": {
-        "bun": "^1.3.14",
+        "bun": "^1.4.2",
         "chokidar": "^4.0.3",
         "commander": "^14.0.3",
         "diff": "^8.0.3",
@@ -24,7 +24,7 @@
         "@opentui/react": "^0.5.6",
         "@pierre/diffs": "1.3.5",
         "@shikijs/themes": "3.23.0",
-        "@types/bun": "1.3.14",
+        "@types/bun": "1.4.1",
         "@types/react": "^19.2.14",
         "@types/ws": "^8.18.1",
         "dependency-cruiser": "18.2.0",
@@ -34,7 +34,7 @@
         "oxfmt": "^0.41.0",
         "oxlint": "^1.56.0",
         "react": "^19.2.4",
-        "simple-git-hooks": "^2.13.1",
+        "simple-git-hooks": "^2.14.0",
         "tuistory": "^0.11.0",
         "typescript": "^5.9.3",
       },
@@ -135,37 +135,29 @@
 
     "@opentui/react": ["@opentui/react@0.5.6", "", { "dependencies": { "@opentui/core": "0.5.6", "react-reconciler": "^0.33.0" }, "peerDependencies": { "react": ">=19.2.0", "react-devtools-core": "^7.0.1", "ws": "^8.18.0" } }, "sha512-dMQTlcD1zlDTQC8r9rZKlHD7CORkY2M5D7tqhgoccoOK9p6q05FqrdRCTYHu1+VZYafqIV0k2IpMY2e34sngiQ=="],
 
-    "@oven/bun-darwin-aarch64": ["@oven/bun-darwin-aarch64@1.3.14", "", { "os": "darwin", "cpu": "arm64" }, "sha512-Omj20SuiHBOUjUBIyqtkNjSUIjOtEOJwmbix/ZyFH4BaQ6OZTaaRWIR4TjHVz0yadHgli6lLTiAh1uarnvD49A=="],
+    "@oven/bun-darwin-aarch64": ["@oven/bun-darwin-aarch64@1.4.2", "", { "os": "darwin", "cpu": "arm64" }, "sha512-MXdZkP1featqxZ+/VTXWG1BVjM4OGBehVY2Q88EeUj/7L0UMeCGItmyPYTN+wxvlGJ6F66JEtzsw+GvQWewnag=="],
 
-    "@oven/bun-darwin-x64": ["@oven/bun-darwin-x64@1.3.14", "", { "os": "darwin", "cpu": "x64" }, "sha512-FFj3QdU/OhlDyZOJ8CWfN5eWLpRlT4qjZg7lMQi7jA6GuoY5ajlO1zWLP/MuHYRSbXQUvV52RejNi8DVnAp13w=="],
+    "@oven/bun-darwin-x64": ["@oven/bun-darwin-x64@1.4.2", "", { "os": "darwin", "cpu": "x64" }, "sha512-gZTxZuLjkUhAWjTETu3tw0WhsEdNkJ64daj60ybhPf835a2yollV3yTkK9JozvzKPx4TRFzLSl8C+U525pxVbw=="],
 
-    "@oven/bun-darwin-x64-baseline": ["@oven/bun-darwin-x64-baseline@1.3.14", "", { "os": "darwin", "cpu": "x64" }, "sha512-OSfsTZstc898HHElhU4NccaBGOSSDn5VfahiVTnidZ9B/+wb7WTyfZJaBeJcfjwJ9H2W9uTh2TGtl3UfcXgV9g=="],
+    "@oven/bun-freebsd-aarch64": ["@oven/bun-freebsd-aarch64@1.4.2", "", { "os": "freebsd", "cpu": "arm64" }, "sha512-SMNItMw1Z8QeeQVKnw8jA7xQNkeXdP+OPgin4Wi/QTx/B8RHHLnuZfqmFy7NtVeT2NF0kKYppW4WWd2CCYZjhQ=="],
 
-    "@oven/bun-freebsd-aarch64": ["@oven/bun-freebsd-aarch64@1.3.14", "", { "os": "freebsd", "cpu": "arm64" }, "sha512-LIKrXaFxAHybVO5Pf+9XP2FHUj/5APvXTUKk9dqHm5iFz4oH+W24cmhjkJirNujh9hKeTyrpWSe3no9JZKowIw=="],
+    "@oven/bun-freebsd-x64": ["@oven/bun-freebsd-x64@1.4.2", "", { "os": "freebsd", "cpu": "x64" }, "sha512-THbPKXhO54N0DpFRKZNDZpQ7dpbX0bWASuARckAUS9wRtFIHsiY+uULXJvxJGo2YD1YewvXQ4G8Fj7XT5oBCiw=="],
 
-    "@oven/bun-freebsd-x64": ["@oven/bun-freebsd-x64@1.3.14", "", { "os": "freebsd", "cpu": "x64" }, "sha512-uwD+fGUH1ADpIF3B1U2jWzzb20QwRLZfj5QZ28GUCGrAJ/nTmWrD6YYGsblCY1wuhldRez3lU40AyuvSCyLYmw=="],
+    "@oven/bun-linux-aarch64": ["@oven/bun-linux-aarch64@1.4.2", "", { "os": "linux", "cpu": "arm64" }, "sha512-3BBP9ovJ2RGHFH6Ae1CAtxNtG1+YY6GD6rmYbsUosoAk9+OEl6zeDQ/k4fBkc6dYOJCtWnx8hUxzNzQATSmvYQ=="],
 
-    "@oven/bun-linux-aarch64": ["@oven/bun-linux-aarch64@1.3.14", "", { "os": "linux", "cpu": "arm64" }, "sha512-X5SsPZHs+iYO8R/efIcRtc7gT2Q2DgPfliCxEkx4cXBumwkw0c/EsHMNwH3EgGpCDaZ7IYVPhpCG/xBOQHEwZw=="],
+    "@oven/bun-linux-aarch64-android": ["@oven/bun-linux-aarch64-android@1.4.2", "", { "os": "android", "cpu": "arm64" }, "sha512-3mZKO2rhsNgbAUtAHC1UKUlF2zTxFraDZT/Elv8wzyH0fJL9h+Iv3TgB9lO63w89PRn3eFe+NRA1bhVgikKNPQ=="],
 
-    "@oven/bun-linux-aarch64-android": ["@oven/bun-linux-aarch64-android@1.3.14", "", { "os": "android", "cpu": "arm64" }, "sha512-y4kq5b85lsrmFb9Xvi4w9mA5IEFJkLMrSmYn06q24KjL9rUWDWO3VFZEtteZxUN5+ec3Zm5S8OnJw1umaCbVjA=="],
+    "@oven/bun-linux-aarch64-musl": ["@oven/bun-linux-aarch64-musl@1.4.2", "", { "os": "linux", "cpu": "arm64" }, "sha512-+Sm6y+lSiSFBOtXmnekp5Q6n1tUKlyv71FCPWBc61Cgb14T5eBs8SN/nh4MUCOKzONkI3O+as3MGUgikS4aCBQ=="],
 
-    "@oven/bun-linux-aarch64-musl": ["@oven/bun-linux-aarch64-musl@1.3.14", "", { "os": "linux", "cpu": "arm64" }, "sha512-jmqOA92Cd1NL/1XBd4bFkJLxQ86K0RW7ohxS2qzzAvuitO4JiIxjjTeCspoU44zCozH72HpfZfUE2On31OjnWA=="],
+    "@oven/bun-linux-x64": ["@oven/bun-linux-x64@1.4.2", "", { "os": "linux", "cpu": "x64" }, "sha512-9/E/UXOTpSo3YsV5g+FhtTd/qTpiWoKuxS12cqtuYA1ssu9fRAoPQnipFgGyck3tWO63iUdxBiygq+kELFawng=="],
 
-    "@oven/bun-linux-x64": ["@oven/bun-linux-x64@1.3.14", "", { "os": "linux", "cpu": "x64" }, "sha512-7OVTAKvwfPmSbIV1HpdOoVVx5VRc427GuPPne93N6vk4eQBPId9nXmZDh9/zGaKPdbVjVtQSZafWQoUjx38Utw=="],
+    "@oven/bun-linux-x64-android": ["@oven/bun-linux-x64-android@1.4.2", "", { "os": "android", "cpu": "x64" }, "sha512-6HC5tzcC79113n2IHCTJMWv+HsQImv4ZFEK2XpYLxY6HbT8tM4cUM2Zv1bHZBQsS3jv/zYBamDJ1UX7If0d5tw=="],
 
-    "@oven/bun-linux-x64-android": ["@oven/bun-linux-x64-android@1.3.14", "", { "os": "android", "cpu": "x64" }, "sha512-qe9e1d+3VAEU7nAA2ol9Jvmy/o99PVMSgZhHn7Q/9O3YcDrfEqyQ8zm4zoe5qTEo8HZH0dN03Le0Ys2eQPs7eg=="],
+    "@oven/bun-linux-x64-musl": ["@oven/bun-linux-x64-musl@1.4.2", "", { "os": "linux", "cpu": "x64" }, "sha512-vVTKUg1bnPhRP/Hp73jIVoFh2vPFNYEqYX0ERKfZBOQEEHitNAeukZzzuUDZS0SoDCIpuWUGSpd/CDMbjdR+Uw=="],
 
-    "@oven/bun-linux-x64-baseline": ["@oven/bun-linux-x64-baseline@1.3.14", "", { "os": "linux", "cpu": "x64" }, "sha512-q/8EdOC0yUE8FPeoOVq8/Pw5I9/tJaYmUfO/uDUAREx8IUnOJH1RJ5A3BjFqre8pvJoiZA9AovPJq5FnNNjSxA=="],
+    "@oven/bun-windows-aarch64": ["@oven/bun-windows-aarch64@1.4.2", "", { "os": "win32", "cpu": "arm64" }, "sha512-8EJ1ST7339WJE3poPW5nBgVW/lWf9HBz4W27ZUNhburKmcBLOByPyE6DP9fHD8FQGm5c+ilUN2hX1mrW0jxq9Q=="],
 
-    "@oven/bun-linux-x64-musl": ["@oven/bun-linux-x64-musl@1.3.14", "", { "os": "linux", "cpu": "x64" }, "sha512-GBCB/k/sIqcr06eTNgg7g46qiUv35Jasx4XiccJ/n7RGqrE4RWUD/XJBbWFprVPjvqd59+QtSnS99XGqvftHfg=="],
-
-    "@oven/bun-linux-x64-musl-baseline": ["@oven/bun-linux-x64-musl-baseline@1.3.14", "", { "os": "linux", "cpu": "x64" }, "sha512-n6iE71G4lQE4XkrZhQQcL5YUlxDbnq6nqV7zeQi33PMsLT/0kYE+RvHOtBWZ3w0wMdXZfINmp63hIb9ijUBGtw=="],
-
-    "@oven/bun-windows-aarch64": ["@oven/bun-windows-aarch64@1.3.14", "", { "os": "win32", "cpu": "arm64" }, "sha512-T7s3x/BsVKQObGU6QDkZeI6wKynzqGbBH1yI77jrrj5siElclxr3DQrDIk8CV4G5/SJq2HHq4kpLyYY2DKCSmA=="],
-
-    "@oven/bun-windows-x64": ["@oven/bun-windows-x64@1.3.14", "", { "os": "win32", "cpu": "x64" }, "sha512-mUFWL3BoYkNpjd8e9PqROiFF/1Xeotq20mABJsiQH62jM1g5zqWh4khw1RZ6bX8Q8fWvlPaxG1PjofkmjUi3vg=="],
-
-    "@oven/bun-windows-x64-baseline": ["@oven/bun-windows-x64-baseline@1.3.14", "", { "os": "win32", "cpu": "x64" }, "sha512-uIjLUC1S9DWgICzuoMba7vurBJnBruE4S5CxnvmZkdqWVXRzx1Rgu636HoH+k0qeaQCFh3jeG3JQ1y6fRHv0sw=="],
+    "@oven/bun-windows-x64": ["@oven/bun-windows-x64@1.4.2", "", { "os": "win32", "cpu": "x64" }, "sha512-+bN6OuVld/9diT/RLSXSW7JE6CvNE3gL9XsAEjULi1nUsXd6DNO6GuA9jNdNb3r8PdJFnYHr5aypNV1Oj3Rd9g=="],
 
     "@oxc-parser/binding-android-arm-eabi": ["@oxc-parser/binding-android-arm-eabi@0.142.0", "", { "os": "android", "cpu": "arm" }, "sha512-ZiRGDutGsv1G6bL/ozy/koC0Sv39T1DqyoC4KD1DOy9ZoACm1O5UWhEK2c02Qdk+4lfLVkvFa/mQ0fm/4h1BtQ=="],
 
@@ -353,7 +345,7 @@
 
     "@tybys/wasm-util": ["@tybys/wasm-util@0.10.3", "", { "dependencies": { "tslib": "^2.4.0" } }, "sha512-F3fo1MYrRJYL3zER0OUOmkutjr1Vp23m7OsSgp7nq4SP6OqX6C/56XFIPAl5bt3zaBRjmW7SGz3u/6LwFpYcOg=="],
 
-    "@types/bun": ["@types/bun@1.3.14", "", { "dependencies": { "bun-types": "1.3.14" } }, "sha512-h1hFqFVcvAvD9j9K7ZW7vd82aSA+rTdznZa+5bwvCwqSB1jmmfLcbIWhOLx1/+boy/xmjgCs/OMUL8hRJSmnPw=="],
+    "@types/bun": ["@types/bun@1.4.1", "", { "dependencies": { "bun-types": "1.4.1" } }, "sha512-0AVGiTXGajf1rgKom3N+c5L7CBxuoyyv1i44M0nX4UDK0G/fnRAMiri93nHuVPIb429KKtAgj7HatVmmOjeQLA=="],
 
     "@types/hast": ["@types/hast@3.0.4", "", { "dependencies": { "@types/unist": "*" } }, "sha512-WPs+bbQw5aCj+x6laNGWLH3wviHtoCv/P3+otBhbOhJgG8qtpdAMlTCxLtsTWA7LH1Oh/bFCHsBn0TPS5m30EQ=="],
 
@@ -385,11 +377,11 @@
 
     "ansi-styles": ["ansi-styles@4.3.0", "", { "dependencies": { "color-convert": "^2.0.1" } }, "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg=="],
 
-    "bun": ["bun@1.3.14", "", { "optionalDependencies": { "@oven/bun-darwin-aarch64": "1.3.14", "@oven/bun-darwin-x64": "1.3.14", "@oven/bun-darwin-x64-baseline": "1.3.14", "@oven/bun-freebsd-aarch64": "1.3.14", "@oven/bun-freebsd-x64": "1.3.14", "@oven/bun-linux-aarch64": "1.3.14", "@oven/bun-linux-aarch64-android": "1.3.14", "@oven/bun-linux-aarch64-musl": "1.3.14", "@oven/bun-linux-x64": "1.3.14", "@oven/bun-linux-x64-android": "1.3.14", "@oven/bun-linux-x64-baseline": "1.3.14", "@oven/bun-linux-x64-musl": "1.3.14", "@oven/bun-linux-x64-musl-baseline": "1.3.14", "@oven/bun-windows-aarch64": "1.3.14", "@oven/bun-windows-x64": "1.3.14", "@oven/bun-windows-x64-baseline": "1.3.14" }, "os": [ "!aix", "!sunos", "!openbsd", ], "cpu": [ "x64", "arm64", ], "bin": { "bun": "bin/bun.exe", "bunx": "bin/bunx.exe" } }, "sha512-aB6GVd42x1Y5ie1K16SF+oLGtgSkwX9hgoDdIW88pjvfTccU8F1vfpoOt34QLv0dZ1v3XimtaxPlZUG81Gx9Zg=="],
+    "bun": ["bun@1.4.2", "", { "optionalDependencies": { "@oven/bun-darwin-aarch64": "1.4.2", "@oven/bun-darwin-x64": "1.4.2", "@oven/bun-freebsd-aarch64": "1.4.2", "@oven/bun-freebsd-x64": "1.4.2", "@oven/bun-linux-aarch64": "1.4.2", "@oven/bun-linux-aarch64-android": "1.4.2", "@oven/bun-linux-aarch64-musl": "1.4.2", "@oven/bun-linux-x64": "1.4.2", "@oven/bun-linux-x64-android": "1.4.2", "@oven/bun-linux-x64-musl": "1.4.2", "@oven/bun-windows-aarch64": "1.4.2", "@oven/bun-windows-x64": "1.4.2" }, "os": [ "!aix", "!sunos", "!openbsd", ], "cpu": [ "x64", "arm64", ], "bin": { "bun": "bin/bun.exe", "bunx": "bin/bunx.exe" } }, "sha512-TrSXo6HJfIEaczpb3kjX82I2pL47vK1QUNmHRCUdz9IzaOwa9lzOXSWwu2l18YHE3sNfGRapVLd4nNm+22vVVA=="],
 
     "bun-ffi-structs": ["bun-ffi-structs@0.3.1", "", { "peerDependencies": { "typescript": "^5" } }, "sha512-3gM7PpVWLyrwxWjcilSiGuhWanhZivvo6l0u573NziPH6f/gwk6McbaYgn7oJWov6pKGRTDbrg94W5DcJsKTtQ=="],
 
-    "bun-types": ["bun-types@1.3.14", "", { "dependencies": { "@types/node": "*" } }, "sha512-4N0ig0fEomHt5R0KCFWjovxow98rIoRwKolrYdCcknNwMekCXRnWEUvgu5soYV8QXtVsrUD8B95MBOZGPvr6KQ=="],
+    "bun-types": ["bun-types@1.4.1", "", { "dependencies": { "@types/node": "*" } }, "sha512-loKuVrAFZKfEv+JvWkHRS9GW5IqLuLRjVXN9p+vZvBN86O5hf/pBZQ5hSoyipsrMmWObZBDvWnlmKvjKTM0PdA=="],
 
     "ccount": ["ccount@2.0.1", "", {}, "sha512-eyrF0jiFpY+3drT6383f1qhkbGsLSifNAjA61IUjZjmLCWjItY6LB9ft9YhoDgwfmclB2zhu51Lc7+95b8NRAg=="],
 
@@ -633,7 +625,7 @@
 
     "signal-exit": ["signal-exit@4.1.0", "", {}, "sha512-bzyZ1e88w9O1iNJbKnOlvYTrWPDl46O1bG0D3XInv+9tkPrxrN8jUUTiFlDkkmKWgn1M6CfIA13SuGqOa9Korw=="],
 
-    "simple-git-hooks": ["simple-git-hooks@2.13.1", "", { "bin": { "simple-git-hooks": "cli.js" } }, "sha512-WszCLXwT4h2k1ufIXAgsbiTOazqqevFCIncOuUBZJ91DdvWcC5+OFkluWRQPrcuSYd8fjq+o2y1QfWqYMoAToQ=="],
+    "simple-git-hooks": ["simple-git-hooks@2.14.0", "", { "bin": { "simple-git-hooks": "cli.js" } }, "sha512-kkTORPAuxQz2g1QUuN0J8yGWT28tjGBfPOdJ4xT7Vbeu30veKUZQIoID2qGgCDAakaQn59UeZJJ4cFGB8PVP2A=="],
 
     "sisteransi": ["sisteransi@1.0.5", "", {}, "sha512-bLGGlR1QxBcynn2d5YmDX4MGjlZvy2MRBDRNHLJ8VI6l6+9FUiyTFNJ0IveOSP0bcXgVDPRcfGqA0pjaqUpfVg=="],
 
diff --git a/bunfig.toml b/bunfig.toml
index 36eede24a..02b8e6eab 100644
--- a/bunfig.toml
+++ b/bunfig.toml
@@ -1,3 +1,8 @@
 [install]
 # Only install packages published at least 7 days ago.
 minimumReleaseAge = 604800
+
+# Bun 1.4 defaults workspaces to the isolated linker, which nests packages under
+# node_modules/.bun/<name>@<version>/node_modules/<name>. simple-git-hooks resolves its
+# own package.json one directory too high in that layout, so preserve Hunk's hoisted layout.
+linker = "hoisted"
diff --git a/nix/bun.lock.nix b/nix/bun.lock.nix
index 7d5849c2c..35fa53654 100644
--- a/nix/bun.lock.nix
+++ b/nix/bun.lock.nix
@@ -142,69 +142,53 @@
     url = "https://registry.npmjs.org/@opentui/react/-/react-0.5.6.tgz";
     hash = "sha512-dMQTlcD1zlDTQC8r9rZKlHD7CORkY2M5D7tqhgoccoOK9p6q05FqrdRCTYHu1+VZYafqIV0k2IpMY2e34sngiQ==";
   };
-  "@oven/bun-darwin-aarch64@1.3.14" = fetchurl {
-    url = "https://registry.npmjs.org/@oven/bun-darwin-aarch64/-/bun-darwin-aarch64-1.3.14.tgz";
-    hash = "sha512-Omj20SuiHBOUjUBIyqtkNjSUIjOtEOJwmbix/ZyFH4BaQ6OZTaaRWIR4TjHVz0yadHgli6lLTiAh1uarnvD49A==";
+  "@oven/bun-darwin-aarch64@1.4.2" = fetchurl {
+    url = "https://registry.npmjs.org/@oven/bun-darwin-aarch64/-/bun-darwin-aarch64-1.4.2.tgz";
+    hash = "sha512-MXdZkP1featqxZ+/VTXWG1BVjM4OGBehVY2Q88EeUj/7L0UMeCGItmyPYTN+wxvlGJ6F66JEtzsw+GvQWewnag==";
   };
-  "@oven/bun-darwin-x64-baseline@1.3.14" = fetchurl {
-    url = "https://registry.npmjs.org/@oven/bun-darwin-x64-baseline/-/bun-darwin-x64-baseline-1.3.14.tgz";
-    hash = "sha512-OSfsTZstc898HHElhU4NccaBGOSSDn5VfahiVTnidZ9B/+wb7WTyfZJaBeJcfjwJ9H2W9uTh2TGtl3UfcXgV9g==";
+  "@oven/bun-darwin-x64@1.4.2" = fetchurl {
+    url = "https://registry.npmjs.org/@oven/bun-darwin-x64/-/bun-darwin-x64-1.4.2.tgz";
+    hash = "sha512-gZTxZuLjkUhAWjTETu3tw0WhsEdNkJ64daj60ybhPf835a2yollV3yTkK9JozvzKPx4TRFzLSl8C+U525pxVbw==";
   };
-  "@oven/bun-darwin-x64@1.3.14" = fetchurl {
-    url = "https://registry.npmjs.org/@oven/bun-darwin-x64/-/bun-darwin-x64-1.3.14.tgz";
-    hash = "sha512-FFj3QdU/OhlDyZOJ8CWfN5eWLpRlT4qjZg7lMQi7jA6GuoY5ajlO1zWLP/MuHYRSbXQUvV52RejNi8DVnAp13w==";
+  "@oven/bun-freebsd-aarch64@1.4.2" = fetchurl {
+    url = "https://registry.npmjs.org/@oven/bun-freebsd-aarch64/-/bun-freebsd-aarch64-1.4.2.tgz";
+    hash = "sha512-SMNItMw1Z8QeeQVKnw8jA7xQNkeXdP+OPgin4Wi/QTx/B8RHHLnuZfqmFy7NtVeT2NF0kKYppW4WWd2CCYZjhQ==";
   };
-  "@oven/bun-freebsd-aarch64@1.3.14" = fetchurl {
-    url = "https://registry.npmjs.org/@oven/bun-freebsd-aarch64/-/bun-freebsd-aarch64-1.3.14.tgz";
-    hash = "sha512-LIKrXaFxAHybVO5Pf+9XP2FHUj/5APvXTUKk9dqHm5iFz4oH+W24cmhjkJirNujh9hKeTyrpWSe3no9JZKowIw==";
+  "@oven/bun-freebsd-x64@1.4.2" = fetchurl {
+    url = "https://registry.npmjs.org/@oven/bun-freebsd-x64/-/bun-freebsd-x64-1.4.2.tgz";
+    hash = "sha512-THbPKXhO54N0DpFRKZNDZpQ7dpbX0bWASuARckAUS9wRtFIHsiY+uULXJvxJGo2YD1YewvXQ4G8Fj7XT5oBCiw==";
   };
-  "@oven/bun-freebsd-x64@1.3.14" = fetchurl {
-    url = "https://registry.npmjs.org/@oven/bun-freebsd-x64/-/bun-freebsd-x64-1.3.14.tgz";
-    hash = "sha512-uwD+fGUH1ADpIF3B1U2jWzzb20QwRLZfj5QZ28GUCGrAJ/nTmWrD6YYGsblCY1wuhldRez3lU40AyuvSCyLYmw==";
+  "@oven/bun-linux-aarch64-android@1.4.2" = fetchurl {
+    url = "https://registry.npmjs.org/@oven/bun-linux-aarch64-android/-/bun-linux-aarch64-android-1.4.2.tgz";
+    hash = "sha512-3mZKO2rhsNgbAUtAHC1UKUlF2zTxFraDZT/Elv8wzyH0fJL9h+Iv3TgB9lO63w89PRn3eFe+NRA1bhVgikKNPQ==";
   };
-  "@oven/bun-linux-aarch64-android@1.3.14" = fetchurl {
-    url = "https://registry.npmjs.org/@oven/bun-linux-aarch64-android/-/bun-linux-aarch64-android-1.3.14.tgz";
-    hash = "sha512-y4kq5b85lsrmFb9Xvi4w9mA5IEFJkLMrSmYn06q24KjL9rUWDWO3VFZEtteZxUN5+ec3Zm5S8OnJw1umaCbVjA==";
+  "@oven/bun-linux-aarch64-musl@1.4.2" = fetchurl {
+    url = "https://registry.npmjs.org/@oven/bun-linux-aarch64-musl/-/bun-linux-aarch64-musl-1.4.2.tgz";
+    hash = "sha512-+Sm6y+lSiSFBOtXmnekp5Q6n1tUKlyv71FCPWBc61Cgb14T5eBs8SN/nh4MUCOKzONkI3O+as3MGUgikS4aCBQ==";
   };
-  "@oven/bun-linux-aarch64-musl@1.3.14" = fetchurl {
-    url = "https://registry.npmjs.org/@oven/bun-linux-aarch64-musl/-/bun-linux-aarch64-musl-1.3.14.tgz";
-    hash = "sha512-jmqOA92Cd1NL/1XBd4bFkJLxQ86K0RW7ohxS2qzzAvuitO4JiIxjjTeCspoU44zCozH72HpfZfUE2On31OjnWA==";
+  "@oven/bun-linux-aarch64@1.4.2" = fetchurl {
+    url = "https://registry.npmjs.org/@oven/bun-linux-aarch64/-/bun-linux-aarch64-1.4.2.tgz";
+    hash = "sha512-3BBP9ovJ2RGHFH6Ae1CAtxNtG1+YY6GD6rmYbsUosoAk9+OEl6zeDQ/k4fBkc6dYOJCtWnx8hUxzNzQATSmvYQ==";
   };
-  "@oven/bun-linux-aarch64@1.3.14" = fetchurl {
-    url = "https://registry.npmjs.org/@oven/bun-linux-aarch64/-/bun-linux-aarch64-1.3.14.tgz";
-    hash = "sha512-X5SsPZHs+iYO8R/efIcRtc7gT2Q2DgPfliCxEkx4cXBumwkw0c/EsHMNwH3EgGpCDaZ7IYVPhpCG/xBOQHEwZw==";
+  "@oven/bun-linux-x64-android@1.4.2" = fetchurl {
+    url = "https://registry.npmjs.org/@oven/bun-linux-x64-android/-/bun-linux-x64-android-1.4.2.tgz";
+    hash = "sha512-6HC5tzcC79113n2IHCTJMWv+HsQImv4ZFEK2XpYLxY6HbT8tM4cUM2Zv1bHZBQsS3jv/zYBamDJ1UX7If0d5tw==";
   };
-  "@oven/bun-linux-x64-android@1.3.14" = fetchurl {
-    url = "https://registry.npmjs.org/@oven/bun-linux-x64-android/-/bun-linux-x64-android-1.3.14.tgz";
-    hash = "sha512-qe9e1d+3VAEU7nAA2ol9Jvmy/o99PVMSgZhHn7Q/9O3YcDrfEqyQ8zm4zoe5qTEo8HZH0dN03Le0Ys2eQPs7eg==";
+  "@oven/bun-linux-x64-musl@1.4.2" = fetchurl {
+    url = "https://registry.npmjs.org/@oven/bun-linux-x64-musl/-/bun-linux-x64-musl-1.4.2.tgz";
+    hash = "sha512-vVTKUg1bnPhRP/Hp73jIVoFh2vPFNYEqYX0ERKfZBOQEEHitNAeukZzzuUDZS0SoDCIpuWUGSpd/CDMbjdR+Uw==";
   };
-  "@oven/bun-linux-x64-baseline@1.3.14" = fetchurl {
-    url = "https://registry.npmjs.org/@oven/bun-linux-x64-baseline/-/bun-linux-x64-baseline-1.3.14.tgz";
-    hash = "sha512-q/8EdOC0yUE8FPeoOVq8/Pw5I9/tJaYmUfO/uDUAREx8IUnOJH1RJ5A3BjFqre8pvJoiZA9AovPJq5FnNNjSxA==";
+  "@oven/bun-linux-x64@1.4.2" = fetchurl {
+    url = "https://registry.npmjs.org/@oven/bun-linux-x64/-/bun-linux-x64-1.4.2.tgz";
+    hash = "sha512-9/E/UXOTpSo3YsV5g+FhtTd/qTpiWoKuxS12cqtuYA1ssu9fRAoPQnipFgGyck3tWO63iUdxBiygq+kELFawng==";
   };
-  "@oven/bun-linux-x64-musl-baseline@1.3.14" = fetchurl {
-    url = "https://registry.npmjs.org/@oven/bun-linux-x64-musl-baseline/-/bun-linux-x64-musl-baseline-1.3.14.tgz";
-    hash = "sha512-n6iE71G4lQE4XkrZhQQcL5YUlxDbnq6nqV7zeQi33PMsLT/0kYE+RvHOtBWZ3w0wMdXZfINmp63hIb9ijUBGtw==";
+  "@oven/bun-windows-aarch64@1.4.2" = fetchurl {
+    url = "https://registry.npmjs.org/@oven/bun-windows-aarch64/-/bun-windows-aarch64-1.4.2.tgz";
+    hash = "sha512-8EJ1ST7339WJE3poPW5nBgVW/lWf9HBz4W27ZUNhburKmcBLOByPyE6DP9fHD8FQGm5c+ilUN2hX1mrW0jxq9Q==";
   };
-  "@oven/bun-linux-x64-musl@1.3.14" = fetchurl {
-    url = "https://registry.npmjs.org/@oven/bun-linux-x64-musl/-/bun-linux-x64-musl-1.3.14.tgz";
-    hash = "sha512-GBCB/k/sIqcr06eTNgg7g46qiUv35Jasx4XiccJ/n7RGqrE4RWUD/XJBbWFprVPjvqd59+QtSnS99XGqvftHfg==";
-  };
-  "@oven/bun-linux-x64@1.3.14" = fetchurl {
-    url = "https://registry.npmjs.org/@oven/bun-linux-x64/-/bun-linux-x64-1.3.14.tgz";
-    hash = "sha512-7OVTAKvwfPmSbIV1HpdOoVVx5VRc427GuPPne93N6vk4eQBPId9nXmZDh9/zGaKPdbVjVtQSZafWQoUjx38Utw==";
-  };
-  "@oven/bun-windows-aarch64@1.3.14" = fetchurl {
-    url = "https://registry.npmjs.org/@oven/bun-windows-aarch64/-/bun-windows-aarch64-1.3.14.tgz";
-    hash = "sha512-T7s3x/BsVKQObGU6QDkZeI6wKynzqGbBH1yI77jrrj5siElclxr3DQrDIk8CV4G5/SJq2HHq4kpLyYY2DKCSmA==";
-  };
-  "@oven/bun-windows-x64-baseline@1.3.14" = fetchurl {
-    url = "https://registry.npmjs.org/@oven/bun-windows-x64-baseline/-/bun-windows-x64-baseline-1.3.14.tgz";
-    hash = "sha512-uIjLUC1S9DWgICzuoMba7vurBJnBruE4S5CxnvmZkdqWVXRzx1Rgu636HoH+k0qeaQCFh3jeG3JQ1y6fRHv0sw==";
-  };
-  "@oven/bun-windows-x64@1.3.14" = fetchurl {
-    url = "https://registry.npmjs.org/@oven/bun-windows-x64/-/bun-windows-x64-1.3.14.tgz";
-    hash = "sha512-mUFWL3BoYkNpjd8e9PqROiFF/1Xeotq20mABJsiQH62jM1g5zqWh4khw1RZ6bX8Q8fWvlPaxG1PjofkmjUi3vg==";
+  "@oven/bun-windows-x64@1.4.2" = fetchurl {
+    url = "https://registry.npmjs.org/@oven/bun-windows-x64/-/bun-windows-x64-1.4.2.tgz";
+    hash = "sha512-+bN6OuVld/9diT/RLSXSW7JE6CvNE3gL9XsAEjULi1nUsXd6DNO6GuA9jNdNb3r8PdJFnYHr5aypNV1Oj3Rd9g==";
   };
   "@oxc-parser/binding-android-arm-eabi@0.142.0" = fetchurl {
     url = "https://registry.npmjs.org/@oxc-parser/binding-android-arm-eabi/-/binding-android-arm-eabi-0.142.0.tgz";
@@ -578,9 +562,9 @@
     url = "https://registry.npmjs.org/@tybys/wasm-util/-/wasm-util-0.10.3.tgz";
     hash = "sha512-F3fo1MYrRJYL3zER0OUOmkutjr1Vp23m7OsSgp7nq4SP6OqX6C/56XFIPAl5bt3zaBRjmW7SGz3u/6LwFpYcOg==";
   };
-  "@types/bun@1.3.14" = fetchurl {
-    url = "https://registry.npmjs.org/@types/bun/-/bun-1.3.14.tgz";
-    hash = "sha512-h1hFqFVcvAvD9j9K7ZW7vd82aSA+rTdznZa+5bwvCwqSB1jmmfLcbIWhOLx1/+boy/xmjgCs/OMUL8hRJSmnPw==";
+  "@types/bun@1.4.1" = fetchurl {
+    url = "https://registry.npmjs.org/@types/bun/-/bun-1.4.1.tgz";
+    hash = "sha512-0AVGiTXGajf1rgKom3N+c5L7CBxuoyyv1i44M0nX4UDK0G/fnRAMiri93nHuVPIb429KKtAgj7HatVmmOjeQLA==";
   };
   "@types/hast@3.0.4" = fetchurl {
     url = "https://registry.npmjs.org/@types/hast/-/hast-3.0.4.tgz";
@@ -654,13 +638,13 @@
     url = "https://registry.npmjs.org/bun-ffi-structs/-/bun-ffi-structs-0.3.1.tgz";
     hash = "sha512-3gM7PpVWLyrwxWjcilSiGuhWanhZivvo6l0u573NziPH6f/gwk6McbaYgn7oJWov6pKGRTDbrg94W5DcJsKTtQ==";
   };
-  "bun-types@1.3.14" = fetchurl {
-    url = "https://registry.npmjs.org/bun-types/-/bun-types-1.3.14.tgz";
-    hash = "sha512-4N0ig0fEomHt5R0KCFWjovxow98rIoRwKolrYdCcknNwMekCXRnWEUvgu5soYV8QXtVsrUD8B95MBOZGPvr6KQ==";
+  "bun-types@1.4.1" = fetchurl {
+    url = "https://registry.npmjs.org/bun-types/-/bun-types-1.4.1.tgz";
+    hash = "sha512-loKuVrAFZKfEv+JvWkHRS9GW5IqLuLRjVXN9p+vZvBN86O5hf/pBZQ5hSoyipsrMmWObZBDvWnlmKvjKTM0PdA==";
   };
-  "bun@1.3.14" = fetchurl {
-    url = "https://registry.npmjs.org/bun/-/bun-1.3.14.tgz";
-    hash = "sha512-aB6GVd42x1Y5ie1K16SF+oLGtgSkwX9hgoDdIW88pjvfTccU8F1vfpoOt34QLv0dZ1v3XimtaxPlZUG81Gx9Zg==";
+  "bun@1.4.2" = fetchurl {
+    url = "https://registry.npmjs.org/bun/-/bun-1.4.2.tgz";
+    hash = "sha512-TrSXo6HJfIEaczpb3kjX82I2pL47vK1QUNmHRCUdz9IzaOwa9lzOXSWwu2l18YHE3sNfGRapVLd4nNm+22vVVA==";
   };
   "ccount@2.0.1" = fetchurl {
     url = "https://registry.npmjs.org/ccount/-/ccount-2.0.1.tgz";
@@ -1162,9 +1146,9 @@
     url = "https://registry.npmjs.org/signal-exit/-/signal-exit-4.1.0.tgz";
     hash = "sha512-bzyZ1e88w9O1iNJbKnOlvYTrWPDl46O1bG0D3XInv+9tkPrxrN8jUUTiFlDkkmKWgn1M6CfIA13SuGqOa9Korw==";
   };
-  "simple-git-hooks@2.13.1" = fetchurl {
-    url = "https://registry.npmjs.org/simple-git-hooks/-/simple-git-hooks-2.13.1.tgz";
-    hash = "sha512-WszCLXwT4h2k1ufIXAgsbiTOazqqevFCIncOuUBZJ91DdvWcC5+OFkluWRQPrcuSYd8fjq+o2y1QfWqYMoAToQ==";
+  "simple-git-hooks@2.14.0" = fetchurl {
+    url = "https://registry.npmjs.org/simple-git-hooks/-/simple-git-hooks-2.14.0.tgz";
+    hash = "sha512-kkTORPAuxQz2g1QUuN0J8yGWT28tjGBfPOdJ4xT7Vbeu30veKUZQIoID2qGgCDAakaQn59UeZJJ4cFGB8PVP2A==";
   };
   "sisteransi@1.0.5" = fetchurl {
     url = "https://registry.npmjs.org/sisteransi/-/sisteransi-1.0.5.tgz";
diff --git a/nix/package.nix b/nix/package.nix
index a9ee5818c..13925e510 100644
--- a/nix/package.nix
+++ b/nix/package.nix
@@ -1,11 +1,46 @@
 {
-  bun,
+  autoPatchelfHook,
   bun2nix,
+  fetchurl,
   lib,
   makeWrapper,
+  stdenv,
   ...
 }: let
   packageJson = lib.importJSON ../package.json;
+  bunVersion = lib.removePrefix "bun@" packageJson.packageManager;
+  bunCompilerArchives = {
+    "aarch64-darwin" = fetchurl {
+      url = "https://registry.npmjs.org/@oven/bun-darwin-aarch64/-/bun-darwin-aarch64-${bunVersion}.tgz";
+      hash = "sha512-MXdZkP1featqxZ+/VTXWG1BVjM4OGBehVY2Q88EeUj/7L0UMeCGItmyPYTN+wxvlGJ6F66JEtzsw+GvQWewnag==";
+    };
+    "x86_64-darwin" = fetchurl {
+      url = "https://registry.npmjs.org/@oven/bun-darwin-x64/-/bun-darwin-x64-${bunVersion}.tgz";
+      hash = "sha512-gZTxZuLjkUhAWjTETu3tw0WhsEdNkJ64daj60ybhPf835a2yollV3yTkK9JozvzKPx4TRFzLSl8C+U525pxVbw==";
+    };
+    "aarch64-linux" = fetchurl {
+      url = "https://registry.npmjs.org/@oven/bun-linux-aarch64/-/bun-linux-aarch64-${bunVersion}.tgz";
+      hash = "sha512-3BBP9ovJ2RGHFH6Ae1CAtxNtG1+YY6GD6rmYbsUosoAk9+OEl6zeDQ/k4fBkc6dYOJCtWnx8hUxzNzQATSmvYQ==";
+    };
+    "x86_64-linux" = fetchurl {
+      url = "https://registry.npmjs.org/@oven/bun-linux-x64/-/bun-linux-x64-${bunVersion}.tgz";
+      hash = "sha512-9/E/UXOTpSo3YsV5g+FhtTd/qTpiWoKuxS12cqtuYA1ssu9fRAoPQnipFgGyck3tWO63iUdxBiygq+kELFawng==";
+    };
+  };
+  bunCompilerArchive = bunCompilerArchives.${stdenv.hostPlatform.system};
+  bunCompiler = stdenv.mkDerivation {
+    pname = "bun-compiler";
+    version = bunVersion;
+    src = bunCompilerArchive;
+    sourceRoot = "package";
+    dontBuild = true;
+    dontStrip = true;
+    nativeBuildInputs = lib.optionals stdenv.isLinux [autoPatchelfHook];
+    installPhase = ''
+      mkdir -p $out/bin
+      cp -p bin/bun $out/bin/bun
+    '';
+  };
 in
   bun2nix.mkDerivation {
     pname = "hunkdiff";
@@ -22,9 +57,21 @@ in
     buildPhase = ''
       runHook preBuild
       mkdir -p .bun-tmp .bun-install
+
+      # Compile with the pinned release archive instead of nixpkgs' older Bun.
+      bun_compiler=${bunCompiler}/bin/bun
+      if [ ! -x "$bun_compiler" ]; then
+        echo "Bun compiler archive did not contain an executable" >&2
+        exit 1
+      fi
+      if [ "$("$bun_compiler" --version)" != "${bunVersion}" ]; then
+        echo "Expected Bun compiler ${bunVersion}" >&2
+        exit 1
+      fi
+
       BUN_TMPDIR=$PWD/.bun-tmp \
       BUN_INSTALL=$PWD/.bun-install \
-      ${bun}/bin/bun build --compile \
+      "$bun_compiler" build --compile \
         --no-compile-autoload-bunfig \
         "./src/main.tsx" \
         --outfile "hunk-bin"
diff --git a/package.json b/package.json
index 351997caf..1b761ece8 100644
--- a/package.json
+++ b/package.json
@@ -122,7 +122,7 @@
     "nix:update-lock": "nix run .#update-bun-lock"
   },
   "dependencies": {
-    "bun": "^1.3.14",
+    "bun": "^1.4.2",
     "chokidar": "^4.0.3",
     "commander": "^14.0.3",
     "diff": "^8.0.3",
@@ -141,7 +141,7 @@
     "@opentui/react": "^0.5.6",
     "@pierre/diffs": "1.3.5",
     "@shikijs/themes": "3.23.0",
-    "@types/bun": "1.3.14",
+    "@types/bun": "1.4.1",
     "@types/react": "^19.2.14",
     "@types/ws": "^8.18.1",
     "dependency-cruiser": "18.2.0",
@@ -151,7 +151,7 @@
     "oxfmt": "^0.41.0",
     "oxlint": "^1.56.0",
     "react": "^19.2.4",
-    "simple-git-hooks": "^2.13.1",
+    "simple-git-hooks": "^2.14.0",
     "tuistory": "^0.11.0",
     "typescript": "^5.9.3"
   },
@@ -175,7 +175,7 @@
   "engines": {
     "node": ">=22"
   },
-  "packageManager": "bun@1.3.14",
+  "packageManager": "bun@1.4.2",
   "pi": {
     "skills": [
       "./skills"
diff --git a/scripts/build-bin.test.ts b/scripts/build-bin.test.ts
index 1b4301035..1331f1a7c 100644
--- a/scripts/build-bin.test.ts
+++ b/scripts/build-bin.test.ts
@@ -1,5 +1,19 @@
 import { describe, expect, test } from "bun:test";
-import { compileTargetForHost } from "./build-bin";
+import path from "node:path";
+import { bunCompilerCacheEnvironment, compileTargetForHost } from "./build-bin";
+
+describe("bunCompilerCacheEnvironment", () => {
+  test("keeps downloaded compile targets separate across Bun upgrades", () => {
+    const oldRuntime = bunCompilerCacheEnvironment("repo", "1.3.14");
+    const newRuntime = bunCompilerCacheEnvironment("repo", "1.4.2");
+
+    expect(newRuntime).toEqual({
+      BUN_INSTALL: path.join("repo", ".bun-install", "1.4.2"),
+      BUN_INSTALL_CACHE_DIR: path.join("repo", ".bun-install", "1.4.2", "install", "cache"),
+    });
+    expect(oldRuntime.BUN_INSTALL_CACHE_DIR).not.toBe(newRuntime.BUN_INSTALL_CACHE_DIR);
+  });
+});
 
 describe("compileTargetForHost", () => {
   test("compiles every x64 platform against Bun's baseline runtime", () => {
diff --git a/scripts/build-bin.ts b/scripts/build-bin.ts
index b6e84498e..870d29963 100644
--- a/scripts/build-bin.ts
+++ b/scripts/build-bin.ts
@@ -37,6 +37,15 @@ export function compileTargetForHost(
   return null;
 }
 
+/** Returns compiler cache variables scoped to the Bun version that populates them. */
+export function bunCompilerCacheEnvironment(repoRoot: string, runtimeVersion: string) {
+  const installRoot = path.join(repoRoot, ".bun-install", runtimeVersion);
+  return {
+    BUN_INSTALL: installRoot,
+    BUN_INSTALL_CACHE_DIR: path.join(installRoot, "install", "cache"),
+  };
+}
+
 if (import.meta.main) {
   const repoRoot = path.resolve(import.meta.dir, "..");
   const distDir = path.join(repoRoot, "dist");
@@ -69,7 +78,7 @@ if (import.meta.main) {
       env: {
         ...process.env,
         BUN_TMPDIR: path.join(repoRoot, ".bun-tmp"),
-        BUN_INSTALL: path.join(repoRoot, ".bun-install"),
+        ...bunCompilerCacheEnvironment(repoRoot, Bun.version),
       },
     },
   );
diff --git a/scripts/verify-pr-release-notes.test.ts b/scripts/verify-pr-release-notes.test.ts
index dca493e69..821a59bce 100644
--- a/scripts/verify-pr-release-notes.test.ts
+++ b/scripts/verify-pr-release-notes.test.ts
@@ -198,6 +198,7 @@ describe("verifyPrReleaseNotes", () => {
     expect(existsSync(path.join(root, "status-call.json"))).toBe(false);
   });
 
+  // Hosted Windows can spend more than Bun's default deadline on the two fixture commits.
   test("routes a stable promotion that removes prerelease state through Changesets", async () => {
     const { root } = createTestRepo();
     writeGeneratedPrerelease(root);
@@ -218,7 +219,7 @@ describe("verifyPrReleaseNotes", () => {
     expect(JSON.parse(readFileSync(path.join(root, "status-call.json"), "utf8"))).toEqual([
       `--since=${prereleaseBase}`,
     ]);
-  });
+  }, 10_000);
 
   test("rejects an initial version older than the carried stable changelog", async () => {
     const { root, base } = createTestRepo();
diff --git a/test/cli/compiled-headless-native-lib.test.ts b/test/cli/compiled-headless-native-lib.test.ts
index 8d260beed..5ffb4de21 100644
--- a/test/cli/compiled-headless-native-lib.test.ts
+++ b/test/cli/compiled-headless-native-lib.test.ts
@@ -9,7 +9,8 @@ const executable = process.env.HUNK_TEST_EXECUTABLE
   : undefined;
 const compiledTest = executable ? test : test.skip;
 const compiledLinuxTest = executable && process.platform === "linux" ? test : test.skip;
-const BUN_NATIVE_ARTIFACT_PATTERN = /^\.[0-9a-f]{16}-[0-9a-f]{8}\.(?:so|dylib|dll)$/;
+const BUN_NATIVE_ARTIFACT_PATTERN =
+  /^(?:\.[0-9a-f]{16}-[0-9a-f]{8}|\.bun-\d+-[0-9a-f]{16})\.(?:so|dylib|dll)$/;
 const positiveControlBuildRoot = executable
   ? mkdtempSync(resolve(tmpdir(), "hunk-compiled-opentui-control-"))
   : undefined;
diff --git a/test/cli/fixtures/compiled-opentui-positive-control.ts b/test/cli/fixtures/compiled-opentui-positive-control.ts
index 761a1aa78..da4c073e4 100644
--- a/test/cli/fixtures/compiled-opentui-positive-control.ts
+++ b/test/cli/fixtures/compiled-opentui-positive-control.ts
@@ -1,3 +1,3 @@
-import { RGBA } from "@opentui/core";
+import { resolveRenderLib } from "@opentui/core";
 
-process.stdout.write(RGBA.fromHex("#ffffff").toString());
+process.stdout.write(resolveRenderLib() ? "loaded" : "missing");
diff --git a/test/cli/install-vm/scenarios/historical-pnpm-bun-corruption.sh b/test/cli/install-vm/scenarios/historical-pnpm-bun-corruption.sh
index fb02ff86d..0c31459c4 100755
--- a/test/cli/install-vm/scenarios/historical-pnpm-bun-corruption.sh
+++ b/test/cli/install-vm/scenarios/historical-pnpm-bun-corruption.sh
@@ -8,12 +8,8 @@ pnpm config set registry https://registry.npmjs.org/
 hunkdiff_version=${HISTORICAL_HUNKDIFF_VERSION:?HISTORICAL_HUNKDIFF_VERSION is required}
 bun_version=${HISTORICAL_BUN_VERSION:?HISTORICAL_BUN_VERSION is required}
 
-# Force the historical Hunk dependency to the exact Bun release that mutated pnpm's projection.
-cat >"$HOME/pnpm/global/pnpm-workspace.yaml" <<YAML
-overrides:
-  bun: $bun_version
-YAML
-run_expect historical-install 0 pnpm add -g "hunkdiff@$hunkdiff_version"
+# Add Bun explicitly so pnpm resolves Hunk's compatible transitive range to the historical release.
+run_expect historical-install 0 pnpm add -g "hunkdiff@$hunkdiff_version" "bun@$bun_version"
 bun_manifest=$(find "$HOME/pnpm/store" -path "*/bun/$bun_version/*/node_modules/bun/package.json" -type f -print -quit 2>/dev/null)
 run_expect historical-bun-version 0 node -e 'console.log(require(process.argv[1]).version)' "$bun_manifest"
 assert_contains historical-bun-pinned "$command_dir/historical-bun-version.log" "$bun_version"