diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
new file mode 100644
index 00000000..3df3a888
--- /dev/null
+++ b/.github/workflows/update.yml
@@ -0,0 +1,34 @@
+name: Update
+
+on:
+  schedule:
+    - cron: '0 0 * * *'
+  workflow_dispatch:
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  update:
+    name: Update
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Configure Git
+        run: |
+          git config --global user.name '${{ github.actor }}'
+          git config --global user.email '${{ github.actor }}@users.noreply.github.com'
+
+      - name: Run Molt
+        run: deno task update --commit --pre-commit test --summary title.txt --report body.txt
+
+      - name: Push changes
+        run: git push
+
+      - name: Create Pull Request
+        run: |
+          gh pr create --title "$(cat title.txt)" --body "$(cat body.txt)"
diff --git a/cli.ts b/cli.ts
index 365ad6d3..ce8fede6 100644
--- a/cli.ts
+++ b/cli.ts
@@ -2,13 +2,14 @@ import { existsSync } from "./lib/std/fs.ts";
 import { distinct } from "./lib/std/collections.ts";
 import { parse as parseJsonc } from "./lib/std/jsonc.ts";
 import { dirname, extname, join } from "./lib/std/path.ts";
-import { colors, Command, List, Select } from "./lib/x/cliffy.ts";
+import { colors, Command, Input, List, Select } from "./lib/x/cliffy.ts";
+import { $ } from "./lib/x/dax.ts";
 import { URI } from "./lib/uri.ts";
 import { DependencyUpdate } from "./lib/update.ts";
 import { FileUpdate } from "./lib/file.ts";
-import { commitAll } from "./lib/git.ts";
+import { GitCommitSequence } from "./lib/git.ts";
 
-const { gray, yellow, bold } = colors;
+const { gray, yellow, bold, cyan } = colors;
 
 const checkCommand = new Command()
   .description("Check for the latest version of dependencies")
@@ -21,18 +22,7 @@ async function checkAction(
   ...entrypoints: string[]
 ) {
   _ensureJsFiles(entrypoints);
-  console.log("🔎 Checking for updates...");
-  const updates = await Promise.all(
-    entrypoints.map(async (entrypoint) =>
-      await DependencyUpdate.collect(entrypoint, {
-        importMap: options.importMap ?? await _findImportMap(entrypoint),
-      })
-    ),
-  ).then((results) => results.flat());
-  if (!updates.length) {
-    console.log("🍵 No updates found");
-    return;
-  }
+  const updates = await _collect(entrypoints, options);
   _list(updates);
   const action = await Select.prompt({
     message: "Choose an action",
@@ -48,9 +38,13 @@ async function checkAction(
     case "write":
       return _write(updates);
     case "commit": {
+      const prefix = await Input.prompt({
+        message: "Prefix for commit messages",
+        default: "build(deps): ",
+      });
       const suggestions = _getTasks();
       if (!suggestions.length) {
-        return _commit(updates);
+        return _commit(updates, { prefix });
       }
       const preCommit = await List.prompt(
         {
@@ -64,7 +58,7 @@ async function checkAction(
           suggestions,
         },
       );
-      return _commit(updates, { preCommit, postCommit });
+      return _commit(updates, { preCommit, postCommit, prefix });
     }
   }
 }
@@ -79,6 +73,12 @@ const updateCommand = new Command()
   .option("--post-commit <tasks...:string>", "Run tasks after each commit", {
     depends: ["commit"],
   })
+  .option("--prefix <prefix:string>", "Prefix for commit messages", {
+    depends: ["commit"],
+    default: "build(deps): ",
+  })
+  .option("--summary <file:string>", "Write a summary of changes to file")
+  .option("--report <file:string>", "Write a report of changes to file")
   .arguments("<entrypoints...:string>")
   .action(updateAction);
 
@@ -88,26 +88,38 @@ async function updateAction(
     importMap?: string;
     preCommit?: string[];
     postCommit?: string[];
+    prefix: string;
+    summary?: string;
+    report?: string;
   },
   ...entrypoints: string[]
 ) {
-  console.log("🔎 Checking for updates...");
-  const updates = await Promise.all(
-    entrypoints.map(async (entrypoint) =>
-      await DependencyUpdate.collect(entrypoint, {
-        importMap: options.importMap ?? await _findImportMap(entrypoint),
-      })
-    ),
-  ).then((results) => results.flat());
-  if (!updates.length) {
-    console.log("🍵 No updates found");
-    return;
-  }
+  const updates = await _collect(entrypoints, options);
   _list(updates);
   if (options.commit) {
     return _commit(updates, options);
   }
-  return _write(updates);
+  return _write(updates, options);
+}
+
+async function _collect(
+  entrypoints: string[],
+  options: { importMap?: string },
+): Promise<DependencyUpdate[]> {
+  return await $.progress("Checking for updates").with(async () => {
+    const updates = await Promise.all(
+      entrypoints.map(async (entrypoint) =>
+        await DependencyUpdate.collect(entrypoint, {
+          importMap: options.importMap ?? await _findImportMap(entrypoint),
+        })
+      ),
+    ).then((results) => results.flat());
+    if (!updates.length) {
+      console.log("🍵 No updates found");
+      Deno.exit(0);
+    }
+    return updates;
+  });
 }
 
 async function _findImportMap(entrypoint: string): Promise<string | undefined> {
@@ -158,41 +170,81 @@ function _list(updates: DependencyUpdate[]) {
   console.log();
 }
 
-function _write(updates: DependencyUpdate[]) {
-  console.log();
-  console.log("Writing changes...");
-  const results = FileUpdate.collect(updates);
-  FileUpdate.writeAll(results, {
-    onWrite: (module) => console.log(`  💾 ${URI.relative(module.specifier)}`),
+async function _write(
+  updates: DependencyUpdate[],
+  options?: {
+    summary?: string;
+    report?: string;
+  },
+) {
+  const results = await FileUpdate.collect(updates);
+  await FileUpdate.writeAll(results, {
+    onWrite: (module) => console.log(`💾 ${URI.relative(module.specifier)}`),
   });
+  console.log();
+  if (options?.summary) {
+    await Deno.writeTextFile(options.summary, "Update dependencies");
+    console.log(`📄 ${options.summary}`);
+  }
+  if (options?.report) {
+    const content = distinct(
+      updates.map((u) => `- ${u.name} ${u.version.from} => ${u.version.to}`),
+    ).join("\n");
+    await Deno.writeTextFile(options.report, content);
+    console.log(`📄 ${options.report}`);
+  }
 }
 
-function _commit(
+async function _commit(
   updates: DependencyUpdate[],
   options?: {
     preCommit?: string[];
     postCommit?: string[];
+    prefix: string;
+    summary?: string;
+    report?: string;
   },
 ) {
-  console.log("\nCommitting changes...");
-  commitAll(updates, {
+  const commits = GitCommitSequence.from(updates, {
     groupBy: (dependency) => dependency.name,
-    preCommit: () => {
-      options?.preCommit?.forEach((task) => _task(task));
-    },
-    postCommit: (commit) => {
-      console.log(`📝 ${commit.message}`);
-      options?.postCommit?.forEach((task) => _task(task));
-    },
+    composeCommitMessage: ({ group, version }) =>
+      `${options?.prefix}bump ${group}` +
+      (version?.from ? ` from ${version?.from}` : "") +
+      (version?.to ? ` to ${version?.to}` : ""),
+    preCommit: options?.preCommit
+      ? async (commit) => {
+        console.log(`\n📝 Commiting "${commit.message}"...`);
+        for (const task of options?.preCommit ?? []) {
+          await _task(task);
+        }
+      }
+      : undefined,
+    postCommit: options?.postCommit
+      ? async (commit) => {
+        console.log(`📝 ${commit.message}`);
+        for (const task of options?.postCommit ?? []) {
+          await _task(task);
+        }
+      }
+      : undefined,
   });
+  await GitCommitSequence.exec(commits);
+  console.log();
+  if (options?.summary) {
+    await Deno.writeTextFile(options.summary, _summary(commits));
+    console.log(`📄 ${options.summary}`);
+  }
+  if (options?.report) {
+    await Deno.writeTextFile(options.report, _report(commits));
+    console.log(`📄 ${options.report}`);
+  }
 }
 
-function _task(task: string): void {
-  const { code, stderr } = new Deno.Command(Deno.execPath(), {
-    args: ["task", task],
-  }).outputSync();
-  if (code !== 0) {
-    console.error(new TextDecoder().decode(stderr));
+async function _task(task: string) {
+  console.log(`\n🔨 Running task ${cyan(task)}...`);
+  try {
+    await $`deno task -q ${task}`;
+  } catch {
     Deno.exit(1);
   }
 }
@@ -250,6 +302,22 @@ async function _findFileUp(entrypoint: string, root: string) {
   return hits;
 }
 
+function _summary(sequence: GitCommitSequence): string {
+  if (sequence.commits.length === 0) {
+    return "No updates";
+  }
+  if (sequence.commits.length === 1) {
+    return sequence.commits[0].message;
+  }
+  const groups = sequence.commits.map((commit) => commit.group).join(", ");
+  const full = `Updated ${groups}`;
+  return (full.length <= 50) ? full : "Updated dependencies";
+}
+
+function _report(sequence: GitCommitSequence): string {
+  return sequence.commits.map((commit) => `- ${commit.message}`).join("\n");
+}
+
 const main = new Command()
   .name("molt")
   .description("A tool for updating dependencies in Deno projects")
diff --git a/deno.json b/deno.json
index f944fb6e..433c608f 100644
--- a/deno.json
+++ b/deno.json
@@ -1,11 +1,11 @@
 {
   "tasks": {
-    "run": "deno run --allow-env --allow-read --allow-net=deno.land --allow-write=.",
+    "run": "deno run --allow-env --allow-read --allow-write=. --allow-run --allow-net=deno.land",
     "lock": "deno cache --lock=deno.lock --lock-write ./lib/**/*.ts && git add deno.lock",
     "test": "deno test -A",
     "test:fast": "deno task test --no-check",
     "dev": "deno fmt && deno lint && deno task lock && deno task test",
-    "update": "deno task -q run --allow-run ./cli.ts check lib/**/*.ts",
+    "update": "deno task -q run ./cli.ts check lib/**/*.ts",
     "install": "deno install -f -A --name molt cli.ts"
   },
   "fmt": {
diff --git a/deno.lock b/deno.lock
index c7436045..040ca0c2 100644
--- a/deno.lock
+++ b/deno.lock
@@ -19,6 +19,64 @@
     "https://deno.land/std@0.196.0/path/posix.ts": "8b7c67ac338714b30c816079303d0285dd24af6b284f7ad63da5b27372a2c94d",
     "https://deno.land/std@0.196.0/path/separator.ts": "0fb679739d0d1d7bf45b68dacfb4ec7563597a902edbaf3c59b50d5bcadd93b1",
     "https://deno.land/std@0.196.0/path/win32.ts": "4fca292f8d116fd6d62f243b8a61bd3d6835a9f0ede762ba5c01afe7c3c0aa12",
+    "https://deno.land/std@0.201.0/assert/assert.ts": "9a97dad6d98c238938e7540736b826440ad8c1c1e54430ca4c4e623e585607ee",
+    "https://deno.land/std@0.201.0/assert/assertion_error.ts": "4d0bde9b374dfbcbe8ac23f54f567b77024fb67dbb1906a852d67fe050d42f56",
+    "https://deno.land/std@0.201.0/bytes/copy.ts": "939d89e302a9761dcf1d9c937c7711174ed74c59eef40a1e4569a05c9de88219",
+    "https://deno.land/std@0.201.0/fmt/colors.ts": "87544aa2bc91087bb37f9c077970c85bfb041b48e4c37356129d7b450a415b6f",
+    "https://deno.land/std@0.201.0/fs/_util.ts": "fbf57dcdc9f7bc8128d60301eece608246971a7836a3bb1e78da75314f08b978",
+    "https://deno.land/std@0.201.0/fs/copy.ts": "23cc1c465babe5ca4d69778821e2f8addc44593e30a5ca0b902b3784eed75bb6",
+    "https://deno.land/std@0.201.0/fs/empty_dir.ts": "2e52cd4674d18e2e007175c80449fc3d263786a1361e858d9dfa9360a6581b47",
+    "https://deno.land/std@0.201.0/fs/ensure_dir.ts": "dc64c4c75c64721d4e3fb681f1382f803ff3d2868f08563ff923fdd20d071c40",
+    "https://deno.land/std@0.201.0/fs/ensure_file.ts": "39ac83cc283a20ec2735e956adf5de3e8a3334e0b6820547b5772f71c49ae083",
+    "https://deno.land/std@0.201.0/fs/ensure_link.ts": "c15e69c48556d78aae31b83e0c0ece04b7b8bc0951412f5b759aceb6fde7f0ac",
+    "https://deno.land/std@0.201.0/fs/ensure_symlink.ts": "b389c8568f0656d145ac7ece472afe710815cccbb2ebfd19da7978379ae143fe",
+    "https://deno.land/std@0.201.0/fs/eol.ts": "f1f2eb348a750c34500741987b21d65607f352cf7205f48f4319d417fff42842",
+    "https://deno.land/std@0.201.0/fs/exists.ts": "cb59a853d84871d87acab0e7936a4dac11282957f8e195102c5a7acb42546bb8",
+    "https://deno.land/std@0.201.0/fs/expand_glob.ts": "52b8b6f5b1fa585c348250da1c80ce5d820746cb4a75d874b3599646f677d3a7",
+    "https://deno.land/std@0.201.0/fs/mod.ts": "bc3d0acd488cc7b42627044caf47d72019846d459279544e1934418955ba4898",
+    "https://deno.land/std@0.201.0/fs/move.ts": "b4f8f46730b40c32ea3c0bc8eb0fd0e8139249a698883c7b3756424cf19785c9",
+    "https://deno.land/std@0.201.0/fs/walk.ts": "a16146724a6aaf9efdb92023a74e9805195c3469900744ce5de4113b07b29779",
+    "https://deno.land/std@0.201.0/io/buf_reader.ts": "0bd8ad26255945b5f418940db23db03bee0c160dbb5ae4627e2c0be3b361df6a",
+    "https://deno.land/std@0.201.0/io/buffer.ts": "4d6883daeb2e698579c4064170515683d69f40f3de019bfe46c5cf31e74ae793",
+    "https://deno.land/std@0.201.0/path/_basename.ts": "057d420c9049821f983f784fd87fa73ac471901fb628920b67972b0f44319343",
+    "https://deno.land/std@0.201.0/path/_constants.ts": "e49961f6f4f48039c0dfed3c3f93e963ca3d92791c9d478ac5b43183413136e0",
+    "https://deno.land/std@0.201.0/path/_dirname.ts": "355e297236b2218600aee7a5301b937204c62e12da9db4b0b044993d9e658395",
+    "https://deno.land/std@0.201.0/path/_extname.ts": "eaaa5aae1acf1f03254d681bd6a8ce42a9cb5b7ff2213a9d4740e8ab31283664",
+    "https://deno.land/std@0.201.0/path/_format.ts": "4a99270d6810f082e614309164fad75d6f1a483b68eed97c830a506cc589f8b4",
+    "https://deno.land/std@0.201.0/path/_from_file_url.ts": "6eadfae2e6f63ad9ee46b26db4a1b16583055c0392acedfb50ed2fc694b6f581",
+    "https://deno.land/std@0.201.0/path/_interface.ts": "6471159dfbbc357e03882c2266d21ef9afdb1e4aa771b0545e90db58a0ba314b",
+    "https://deno.land/std@0.201.0/path/_is_absolute.ts": "05dac10b5e93c63198b92e3687baa2be178df5321c527dc555266c0f4f51558c",
+    "https://deno.land/std@0.201.0/path/_join.ts": "815f5e85b042285175b1492dd5781240ce126c23bd97bad6b8211fe7129c538e",
+    "https://deno.land/std@0.201.0/path/_normalize.ts": "a19ec8706b2707f9dd974662a5cd89fad438e62ab1857e08b314a8eb49a34d81",
+    "https://deno.land/std@0.201.0/path/_os.ts": "d932f56d41e4f6a6093d56044e29ce637f8dcc43c5a90af43504a889cf1775e3",
+    "https://deno.land/std@0.201.0/path/_parse.ts": "0f9b0ff43682dd9964eb1c4398610c4e165d8db9d3ac9d594220217adf480cfa",
+    "https://deno.land/std@0.201.0/path/_relative.ts": "27bdeffb5311a47d85be26d37ad1969979359f7636c5cd9fcf05dcd0d5099dc5",
+    "https://deno.land/std@0.201.0/path/_resolve.ts": "7a3616f1093735ed327e758313b79c3c04ea921808ca5f19ddf240cb68d0adf6",
+    "https://deno.land/std@0.201.0/path/_to_file_url.ts": "a141e4a525303e1a3a0c0571fd024552b5f3553a2af7d75d1ff3a503dcbb66d8",
+    "https://deno.land/std@0.201.0/path/_to_namespaced_path.ts": "0d5f4caa2ed98ef7a8786286df6af804b50e38859ae897b5b5b4c8c5930a75c8",
+    "https://deno.land/std@0.201.0/path/_util.ts": "4e191b1bac6b3bf0c31aab42e5ca2e01a86ab5a0d2e08b75acf8585047a86221",
+    "https://deno.land/std@0.201.0/path/basename.ts": "bdfa5a624c6a45564dc6758ef2077f2822978a6dbe77b0a3514f7d1f81362930",
+    "https://deno.land/std@0.201.0/path/common.ts": "ee7505ab01fd22de3963b64e46cff31f40de34f9f8de1fff6a1bd2fe79380000",
+    "https://deno.land/std@0.201.0/path/dirname.ts": "b6533f4ee4174a526dec50c279534df5345836dfdc15318400b08c62a62a39dd",
+    "https://deno.land/std@0.201.0/path/extname.ts": "62c4b376300795342fe1e4746c0de518b4dc9c4b0b4617bfee62a2973a9555cf",
+    "https://deno.land/std@0.201.0/path/format.ts": "110270b238514dd68455a4c54956215a1aff7e37e22e4427b7771cefe1920aa5",
+    "https://deno.land/std@0.201.0/path/from_file_url.ts": "9f5cb58d58be14c775ec2e57fc70029ac8b17ed3bd7fe93e475b07280adde0ac",
+    "https://deno.land/std@0.201.0/path/glob.ts": "593e2c3573883225c25c5a21aaa8e9382a696b8e175ea20a3b6a1471ad17aaed",
+    "https://deno.land/std@0.201.0/path/is_absolute.ts": "0b92eb35a0a8780e9f16f16bb23655b67dace6a8e0d92d42039e518ee38103c1",
+    "https://deno.land/std@0.201.0/path/join.ts": "31c5419f23d91655b08ec7aec403f4e4cd1a63d39e28f6e42642ea207c2734f8",
+    "https://deno.land/std@0.201.0/path/mod.ts": "6e1efb0b13121463aedb53ea51dabf5639a3172ab58c89900bbb72b486872532",
+    "https://deno.land/std@0.201.0/path/normalize.ts": "6ea523e0040979dd7ae2f1be5bf2083941881a252554c0f32566a18b03021955",
+    "https://deno.land/std@0.201.0/path/parse.ts": "be8de342bb9e1924d78dc4d93c45215c152db7bf738ec32475560424b119b394",
+    "https://deno.land/std@0.201.0/path/posix.ts": "0a1c1952d132323a88736d03e92bd236f3ed5f9f079e5823fae07c8d978ee61b",
+    "https://deno.land/std@0.201.0/path/relative.ts": "8bedac226afd360afc45d451a6c29fabceaf32978526bcb38e0c852661f66c61",
+    "https://deno.land/std@0.201.0/path/resolve.ts": "133161e4949fc97f9ca67988d51376b0f5eef8968a6372325ab84d39d30b80dc",
+    "https://deno.land/std@0.201.0/path/separator.ts": "40a3e9a4ad10bef23bc2cd6c610291b6c502a06237c2c4cd034a15ca78dedc1f",
+    "https://deno.land/std@0.201.0/path/to_file_url.ts": "00e6322373dd51ad109956b775e4e72e5f9fa68ce2c6b04e4af2a6eed3825d31",
+    "https://deno.land/std@0.201.0/path/to_namespaced_path.ts": "1b1db3055c343ab389901adfbda34e82b7386bcd1c744d54f9c1496ee0fd0c3d",
+    "https://deno.land/std@0.201.0/path/win32.ts": "8b3f80ef7a462511d5e8020ff490edcaa0a0d118f1b1e9da50e2916bdd73f9dd",
+    "https://deno.land/std@0.201.0/streams/read_all.ts": "ee319772fb0fd28302f97343cc48dfcf948f154fd0d755d8efe65814b70533be",
+    "https://deno.land/std@0.201.0/streams/reader_from_stream_reader.ts": "fa4971e5615a010e49492c5d1688ca1a4d17472a41e98b498ab89a64ebd7ac73",
+    "https://deno.land/std@0.201.0/streams/write_all.ts": "aec90152978581ea62d56bb53a5cbf487e6a89c902f87c5969681ffbdf32b998",
     "https://deno.land/std@0.204.0/assert/_constants.ts": "8a9da298c26750b28b326b297316cdde860bc237533b07e1337c021379e6b2a9",
     "https://deno.land/std@0.204.0/assert/_diff.ts": "58e1461cc61d8eb1eacbf2a010932bf6a05b79344b02ca38095f9b805795dc48",
     "https://deno.land/std@0.204.0/assert/_format.ts": "a69126e8a469009adf4cf2a50af889aca364c349797e63174884a52ff75cf4c7",
@@ -118,6 +176,7 @@
     "https://deno.land/x/cliffy@v1.0.0-rc.3/prompt/_generic_suggestions.ts": "5e6ee1190b4dd5af261ae2ff0196dec7f1988ea9c41c6288cfaece293703002c",
     "https://deno.land/x/cliffy@v1.0.0-rc.3/prompt/_utils.ts": "498ae639d7666599d612b615ee85de9103b3c3a913d5196f6b265072674258c7",
     "https://deno.land/x/cliffy@v1.0.0-rc.3/prompt/deps.ts": "2560142f070bb2668e2e8a74683c799461648b9aad01bbf36b3cad3851d712e6",
+    "https://deno.land/x/cliffy@v1.0.0-rc.3/prompt/input.ts": "81821244f895cc4db32c2511c17e21fb48fd7606e300605aeb2a231ab1680544",
     "https://deno.land/x/cliffy@v1.0.0-rc.3/prompt/list.ts": "e5d3e1a6d931b9736d03eec2425fb7b4d2b8d1461a84e210b4787edda414dca4",
     "https://deno.land/x/cliffy@v1.0.0-rc.3/prompt/select.ts": "c10902aeaca02a55d9b846934958dd166ee39c741faebdaa9800689e402186cf",
     "https://deno.land/x/cliffy@v1.0.0-rc.3/table/_layout.ts": "e4a518da28333de95ad791208b9930025987c8b93d5f8b7f30b377b3e26b24e1",
@@ -129,6 +188,43 @@
     "https://deno.land/x/cliffy@v1.0.0-rc.3/table/deps.ts": "1226c4d39d53edc81d7c3e661fb8a79f2e704937c276c60355cd4947a0fe9153",
     "https://deno.land/x/cliffy@v1.0.0-rc.3/table/row.ts": "79eb1468aafdd951e5963898cdafe0752d4ab4c519d5f847f3d8ecb8fe857d4f",
     "https://deno.land/x/cliffy@v1.0.0-rc.3/table/table.ts": "298671e72e61f1ab18b42ae36643181993f79e29b39dc411fdc6ffd53aa04684",
+    "https://deno.land/x/dax@0.35.0/mod.ts": "3fc382546bf3c7b90aa458aa144be7c6e8aed3e8c2680289f9c8694d986b7247",
+    "https://deno.land/x/dax@0.35.0/src/command.ts": "6e7db06015b4ad6decbf59cc5fcb6bd4b03a46276f7e3f3472204c11b2109e0e",
+    "https://deno.land/x/dax@0.35.0/src/command_handler.ts": "841cee0ce12b19eea6c7fcaeaa40a9e3ef4bf50c36cf02afbe3ab7b41f8571eb",
+    "https://deno.land/x/dax@0.35.0/src/commands/args.ts": "a138aef24294e3cbf13cef08f4836d018e8dd99fd06ad82e7e7f08ef680bbc1d",
+    "https://deno.land/x/dax@0.35.0/src/commands/cat.ts": "229dc854f80ea8f1ebd811190fc31e5cf0fe39f76c2de1c27e256cb831237cb0",
+    "https://deno.land/x/dax@0.35.0/src/commands/cd.ts": "239fee1606881dbc3f778a761d1d4557c21a63063c15ab58883a32e7466b7177",
+    "https://deno.land/x/dax@0.35.0/src/commands/cp_mv.ts": "58205a82a9404e444c7c5caf98b5dd2b350c668c0b421546a038b76ea8b6a53d",
+    "https://deno.land/x/dax@0.35.0/src/commands/echo.ts": "247909de5b8ea20218daab419f3aad37b69763052272aca3633fe8e7f83148cd",
+    "https://deno.land/x/dax@0.35.0/src/commands/exit.ts": "c619e52d744dfa3e8fa954026f1c5302d8be991c775553efc85a0f224b77b6ff",
+    "https://deno.land/x/dax@0.35.0/src/commands/export.ts": "b6ecad1203cfe606d69da6c16736f31acf211e864e6822484d85cea1cb7d5528",
+    "https://deno.land/x/dax@0.35.0/src/commands/mkdir.ts": "9381ecdc0e0203d941f89027b6ef2865393bf0a66670bf5f5aaa6a49669244c7",
+    "https://deno.land/x/dax@0.35.0/src/commands/printenv.ts": "473c39b457cae91e9ca029ad420642b9a410257fb699674660c886c6ebe72ebc",
+    "https://deno.land/x/dax@0.35.0/src/commands/pwd.ts": "5438aea979027bfa5c64c2a7f1073389735ea986f6abe2174ec21bcb70a2156f",
+    "https://deno.land/x/dax@0.35.0/src/commands/rm.ts": "d911ff4e2e0b3d3c5d426c7b735313741ad762d9e25a743f101a1b05447eecf8",
+    "https://deno.land/x/dax@0.35.0/src/commands/sleep.ts": "d1183fa8e31ba85a7b88666e854c7aa6e53e1d4c65e39f20a05d8ea4b82efca3",
+    "https://deno.land/x/dax@0.35.0/src/commands/test.ts": "a221f82c209fd53756e9c02c475b9d5833284513853e90fdaaf0c1e1d9cfbf30",
+    "https://deno.land/x/dax@0.35.0/src/commands/touch.ts": "5953dbde8732da47ade9b7554a638ea06a8b67a59842e638fb79f7aebe392650",
+    "https://deno.land/x/dax@0.35.0/src/commands/unset.ts": "8d4abb29f53c3de0c10ba6d51e3d55bce745160f7430396ede58156e8f2b747c",
+    "https://deno.land/x/dax@0.35.0/src/common.ts": "c0e809c591400dbadb25197f2819c59fec6b897c94c1aba6a026d5d1eee9cb53",
+    "https://deno.land/x/dax@0.35.0/src/console/confirm.ts": "d9128d10b77fcc0a8df2784f71c79df68f5c8e00a34b04547b9ba9ddf1c97f96",
+    "https://deno.land/x/dax@0.35.0/src/console/logger.ts": "e0ab5025915cef70df03681c756e211f25bb2e4331f82ed4256b17ddd9e794ea",
+    "https://deno.land/x/dax@0.35.0/src/console/mod.ts": "29ae1f8250b74a477e26a3b6ccf647badf5d8f8e2a9e6c4aa0d5df9e3bbbb273",
+    "https://deno.land/x/dax@0.35.0/src/console/multiSelect.ts": "31003744e58f45f720271bd034d8cfba1055c954ba02d77a2f2eb21e4c1ed55a",
+    "https://deno.land/x/dax@0.35.0/src/console/progress/format.ts": "15ddbb8051580f88ed499281e12ca6f881f875ab73268d7451d7113ee130bd7d",
+    "https://deno.land/x/dax@0.35.0/src/console/progress/interval.ts": "80188d980a27c2eb07c31324365118af549641442f0752fe7c3b0c91832e5046",
+    "https://deno.land/x/dax@0.35.0/src/console/progress/mod.ts": "70080a5d06ab2c58e948225e1e5144458fbc36fbfa61672ac82bb2f6c6991bad",
+    "https://deno.land/x/dax@0.35.0/src/console/prompt.ts": "78c645b41a7562133d05a10901ae4d682cb22bfaf0b5a21cc8475ca2a946aee1",
+    "https://deno.land/x/dax@0.35.0/src/console/select.ts": "c9d7124d975bf34d52ea1ac88fd610ed39db8ee6505b9bb53f371cef2f56c6ab",
+    "https://deno.land/x/dax@0.35.0/src/console/utils.ts": "954c99397dcd2cb3f1ccf50055085f17c9ffb31b25b3c5719776de81e23935f4",
+    "https://deno.land/x/dax@0.35.0/src/deps.ts": "709fcfef942331cbc97c1faf37dbff8b97c411fac1d142106027ca5bbe64df59",
+    "https://deno.land/x/dax@0.35.0/src/lib/mod.ts": "c992db99c8259ae3bf2d35666585dfefda84cf7cf4e624e42ea2ac7367900fe0",
+    "https://deno.land/x/dax@0.35.0/src/lib/rs_lib.generated.js": "381f2f60b458bcb0a6fec1310c2c3b6447339f6995df206b9a4d0c3747ee8c36",
+    "https://deno.land/x/dax@0.35.0/src/path.ts": "5e1ea6139a975d31d6a5ca62c96c095ff7ddcf5c34ef8b75ab0ea04f87ac579b",
+    "https://deno.land/x/dax@0.35.0/src/pipes.ts": "3aa984c0d031f4221953e228ba89452a86068a80d2811fddb9c60737cd4ab174",
+    "https://deno.land/x/dax@0.35.0/src/request.ts": "a2b20859de7a0fbe10584a41de435942ee4726f0b637b1cb55d7f632f4efc74f",
+    "https://deno.land/x/dax@0.35.0/src/result.ts": "0908b69c16b25c3b258f6b2ada12e124686df5f7ea2b98daa27a83973c7b118c",
+    "https://deno.land/x/dax@0.35.0/src/shell.ts": "9475a015d5493197f9611b1259c5dd6d27c7c2ab9c3711606cd4b47412568ee1",
     "https://deno.land/x/deno_graph@0.58.0/deno_graph_wasm.generated.js": "3e0b0aa16a27bd2f354fc48629fc961d283c470787a335217cdcdacb5b6db544",
     "https://deno.land/x/deno_graph@0.58.0/loader.ts": "a2e757383908f4a51659fe1b1203386887ebb17756bac930a64856d613d8d57d",
     "https://deno.land/x/deno_graph@0.58.0/media_type.ts": "a89a1b38d07c160e896de9ceb99285ba8391940140558304171066b5c3ef7609",
@@ -136,11 +232,13 @@
     "https://deno.land/x/dir@1.5.1/data_local_dir/mod.ts": "91eb1c4bfadfbeda30171007bac6d85aadacd43224a5ed721bbe56bc64e9eb66",
     "https://deno.land/x/import_map@v0.15.0/lib/import_map.generated.js": "617626ef749703190de2f781e1e4019d858c9c6ba61a7cae39a14499a5a20628",
     "https://deno.land/x/import_map@v0.15.0/mod.ts": "dbd28bcdb5fba6eb6b7d0d2c300a5b537a13624bcb463311d44fc970d9f0ddad",
+    "https://deno.land/x/outdent@v0.8.0/src/index.ts": "6dc3df4108d5d6fedcdb974844d321037ca81eaaa16be6073235ff3268841a22",
     "https://deno.land/x/unknownutil@v3.10.0/inspect.ts": "33e61bdfed94cd586d66600813b528fa93046a2802d8144277b92f0fa5e5f10e",
     "https://deno.land/x/unknownutil@v3.10.0/is.ts": "957784493b678a8905728c0998577443db3c66b4c8f9eaad56e6dc97167d2d0d",
     "https://deno.land/x/unknownutil@v3.10.0/mod.ts": "50f0bdb70664c65b2954d4b9bb0f95f9bb4c77c4469331fda2475a4ffbb51a15",
     "https://deno.land/x/unknownutil@v3.10.0/util.ts": "5c9b52ef699e569ccec9d4c33148545bf5328c6a5e2f6f56f651ce6bdd44eb1e",
     "https://deno.land/x/wasmbuild@0.14.1/cache.ts": "89eea5f3ce6035a1164b3e655c95f21300498920575ade23161421f5b01967f4",
-    "https://deno.land/x/wasmbuild@0.14.1/loader.ts": "d98d195a715f823151cbc8baa3f32127337628379a02d9eb2a3c5902dbccfc02"
+    "https://deno.land/x/wasmbuild@0.14.1/loader.ts": "d98d195a715f823151cbc8baa3f32127337628379a02d9eb2a3c5902dbccfc02",
+    "https://deno.land/x/which@0.3.0/mod.ts": "3e10d07953c14e4ddc809742a3447cef14202cdfe9be6678a1dfc8769c4487e6"
   }
 }
diff --git a/lib/file.ts b/lib/file.ts
index c0ba3250..7f1a3017 100644
--- a/lib/file.ts
+++ b/lib/file.ts
@@ -16,16 +16,16 @@ export const FileUpdate = {
   writeAll,
 };
 
-function collect(
+async function collect(
   dependencies: DependencyUpdate[],
-): FileUpdate[] {
+): Promise<FileUpdate[]> {
   /** A map of module specifiers to the module content updates. */
   const results = new Map<URI<"file">, FileUpdate>();
   for (const dependency of dependencies) {
     const referrer = dependency.map?.source ?? dependency.referrer;
     const current = results.get(referrer) ?? {
       specifier: referrer,
-      content: Deno.readTextFileSync(new URL(referrer)),
+      content: await Deno.readTextFile(new URL(referrer)),
       dependencies: [],
     } satisfies FileUpdate;
     const content = dependency.map
@@ -40,20 +40,20 @@ function collect(
   return Array.from(results.values());
 }
 
-export function writeAll(
+export async function writeAll(
   updates: FileUpdate[],
   options?: {
-    onWrite?: (result: FileUpdate) => void;
+    onWrite?: (result: FileUpdate) => void | Promise<void>;
   },
-): void {
-  updates.forEach((it) => {
-    write(it);
-    options?.onWrite?.(it);
-  });
+) {
+  for (const update of updates) {
+    await write(update);
+    await options?.onWrite?.(update);
+  }
 }
 
-export function write(
+export async function write(
   result: FileUpdate,
-): void {
-  Deno.writeTextFileSync(new URL(result.specifier), result.content);
+) {
+  await Deno.writeTextFile(new URL(result.specifier), result.content);
 }
diff --git a/lib/file_test.ts b/lib/file_test.ts
index a35151c0..b627316f 100644
--- a/lib/file_test.ts
+++ b/lib/file_test.ts
@@ -17,14 +17,14 @@ import { URI } from "./uri.ts";
 
 describe("collect", () => {
   it("direct import", async () => {
-    const results = FileUpdate.collect(
+    const results = await FileUpdate.collect(
       await DependencyUpdate.collect("./test/fixtures/direct-import/mod.ts"),
     );
     assertEquals(results.length, 2);
   });
 
   it("import map", async () => {
-    const results = FileUpdate.collect(
+    const results = await FileUpdate.collect(
       await DependencyUpdate.collect(
         "./test/fixtures/import-map/mod.ts",
         { importMap: "./test/fixtures/import-map/deno.json" },
@@ -42,7 +42,7 @@ describe("collect", () => {
   });
 
   it("import map with no resolve", async () => {
-    const results = FileUpdate.collect(
+    const results = await FileUpdate.collect(
       await DependencyUpdate.collect(
         "./test/fixtures/import-map-no-resolve/mod.ts",
         { importMap: "./test/fixtures/import-map-no-resolve/deno.json" },
@@ -56,13 +56,14 @@ describe("collect", () => {
 
 describe("writeAll", () => {
   let output: Map<string, string>;
-  let writeTextFileSyncStub: Stub;
+  let writeTextFileStub: Stub;
 
   beforeAll(() => {
     output = new Map<string, string>();
-    writeTextFileSyncStub = stub(
+    writeTextFileStub = stub(
       Deno,
-      "writeTextFileSync", // deno-lint-ignore require-await
+      "writeTextFile",
+      // deno-lint-ignore require-await
       async (path, data) => {
         output.set(path.toString(), data.toString());
       },
@@ -70,37 +71,37 @@ describe("writeAll", () => {
   });
 
   afterAll(() => {
-    writeTextFileSyncStub.restore();
+    writeTextFileStub.restore();
   });
 
   it("direct import", async () => {
-    const results = FileUpdate.collect(
+    const results = await FileUpdate.collect(
       await DependencyUpdate.collect("./test/fixtures/direct-import/mod.ts"),
     );
-    FileUpdate.writeAll(results);
+    await FileUpdate.writeAll(results);
     assertExists(output.get(URI.from("test/fixtures/direct-import/mod.ts")));
     assertExists(output.get(URI.from("test/fixtures/direct-import/lib.ts")));
   });
 
   it("import map", async () => {
-    const results = FileUpdate.collect(
+    const results = await FileUpdate.collect(
       await DependencyUpdate.collect(
         "./test/fixtures/import-map/mod.ts",
         { importMap: "./test/fixtures/import-map/deno.json" },
       ),
     );
-    FileUpdate.writeAll(results);
+    await FileUpdate.writeAll(results);
     assertExists(output.get(URI.from("test/fixtures/import-map/deno.json")));
   });
 
   it("import map with no resolve", async () => {
-    const results = FileUpdate.collect(
+    const results = await FileUpdate.collect(
       await DependencyUpdate.collect(
         "./test/fixtures/import-map-no-resolve/mod.ts",
         { importMap: "./test/fixtures/import-map-no-resolve/deno.json" },
       ),
     );
-    FileUpdate.writeAll(results);
+    await FileUpdate.writeAll(results);
     assertExists(
       output.get(URI.from("test/fixtures/import-map-no-resolve/mod.ts")),
     );
diff --git a/lib/git.ts b/lib/git.ts
index 8c8f7244..4667d54f 100644
--- a/lib/git.ts
+++ b/lib/git.ts
@@ -12,8 +12,8 @@ export interface CommitProps {
 export interface CommitOptions {
   groupBy?: (dependency: DependencyUpdate) => string;
   composeCommitMessage?: (props: CommitProps) => string;
-  preCommit?: (commit: GitCommit) => void;
-  postCommit?: (commit: GitCommit) => void;
+  preCommit?: (commit: GitCommit) => void | Promise<void>;
+  postCommit?: (commit: GitCommit) => void | Promise<void>;
   gitAddOptions?: string[];
   gitCommitOptions?: string[];
 }
@@ -40,9 +40,7 @@ export interface GitCommit extends CommitProps {
 }
 
 export const GitCommit = {
-  sequence: createGitCommitSequence,
   exec: execGitCommit,
-  execAll: execGitCommitSequence,
 };
 
 export interface GitCommitSequence {
@@ -50,11 +48,16 @@ export interface GitCommitSequence {
   options: CommitOptions;
 }
 
+export const GitCommitSequence = {
+  from: createGitCommitSequence,
+  exec: execGitCommitSequence,
+};
+
 export function commitAll(
   updates: DependencyUpdate[],
   options?: CommitOptions,
-): void {
-  execGitCommitSequence(
+) {
+  return execGitCommitSequence(
     createGitCommitSequence(updates, {
       ...defaultCommitOptions,
       ...options,
@@ -75,39 +78,41 @@ function createGitCommitSequence(
     }
     groups.get(key)!.push(u);
   }
-  const version = createVersionProp(updates);
   const commits: GitCommit[] = Array.from(groups.entries()).map((
     [group, updates],
-  ) => ({
-    group,
-    version,
-    message: _options.composeCommitMessage({ group, version }),
-    updates,
-  }));
+  ) => {
+    const version = createVersionProp(updates);
+    return ({
+      group,
+      version,
+      message: _options.composeCommitMessage({ group, version }),
+      updates,
+    });
+  });
   return { commits, options: _options };
 }
 
-function execGitCommitSequence(
+async function execGitCommitSequence(
   sequence: GitCommitSequence,
 ) {
   for (const commit of sequence.commits) {
-    execGitCommit(commit, sequence.options);
+    await execGitCommit(commit, sequence.options);
   }
 }
 
-function execGitCommit(
+async function execGitCommit(
   commit: GitCommit,
   options?: CommitOptions,
 ) {
-  const results = FileUpdate.collect(commit.updates);
-  FileUpdate.writeAll(results);
-  options?.preCommit?.(commit);
-  _add(results, options?.gitAddOptions ?? []);
-  _commit(commit.message, options?.gitCommitOptions ?? []);
-  options?.postCommit?.(commit);
+  const results = await FileUpdate.collect(commit.updates);
+  await FileUpdate.writeAll(results);
+  await options?.preCommit?.(commit);
+  await _add(results, options?.gitAddOptions ?? []);
+  await _commit(commit.message, options?.gitCommitOptions ?? []);
+  await options?.postCommit?.(commit);
 }
 
-function _add(
+async function _add(
   results: FileUpdate[],
   options: string[],
 ) {
@@ -115,20 +120,20 @@ function _add(
   const command = new Deno.Command("git", {
     args: ["add", ...options, ...files],
   });
-  const { code } = command.outputSync();
+  const { code } = await command.output();
   if (code !== 0) {
     throw new Error(`git add failed: ${code}`);
   }
 }
 
-function _commit(
+async function _commit(
   message: string,
   options: string[],
 ) {
   const command = new Deno.Command("git", {
     args: ["commit", ...options, "-m", message],
   });
-  const { code } = command.outputSync();
+  const { code } = await command.output();
   if (code !== 0) {
     throw new Error(`git commit failed: ${code}`);
   }
diff --git a/lib/git_test.ts b/lib/git_test.ts
index 6e76a510..956cac85 100644
--- a/lib/git_test.ts
+++ b/lib/git_test.ts
@@ -15,7 +15,7 @@ import { DependencyUpdate } from "./update.ts";
 import { commitAll } from "./git.ts";
 
 const DenoCommandOriginal = Deno.Command;
-const readTextFileSyncOriginal = Deno.readTextFileSync;
+const readTextFileOriginal = Deno.readTextFile;
 
 class DenoCommandStub {
   static commands: string[] = [];
@@ -26,7 +26,7 @@ class DenoCommandStub {
     });
     DenoCommandStub.commands.push(command);
   }
-  outputSync() {
+  output() {
     return { code: 0 };
   }
   static clear() {
@@ -37,27 +37,29 @@ class DenoCommandStub {
 describe("commitAll()", () => {
   let output: { path: string; content: string }[] = [];
   let updates: DependencyUpdate[];
-  let writeTextFileSyncStub: Stub;
-  let readTextFileSyncStub: Stub;
+  let writeTextFileStub: Stub;
+  let readTextFileStub: Stub;
 
   beforeAll(async () => {
     updates = await DependencyUpdate.collect(
       "./test/fixtures/direct-import/mod.ts",
     );
-    writeTextFileSyncStub = stub(
+    writeTextFileStub = stub(
       Deno,
-      "writeTextFileSync",
-      (path, data) => {
+      "writeTextFile",
+      // deno-lint-ignore require-await
+      async (path, data) => {
         output.push({
           path: path.toString(),
           content: data.toString(),
         });
       },
     );
-    readTextFileSyncStub = stub(
+    readTextFileStub = stub(
       Deno,
-      "readTextFileSync",
-      (path) => {
+      "readTextFile",
+      // deno-lint-ignore require-await
+      async (path) => {
         const file = output.findLast((file) => file.path === path.toString());
         return file!.content;
       },
@@ -66,20 +68,20 @@ describe("commitAll()", () => {
   });
 
   afterAll(() => {
-    writeTextFileSyncStub.restore();
-    readTextFileSyncStub.restore();
+    writeTextFileStub.restore();
+    readTextFileStub.restore();
     Deno.Command = DenoCommandOriginal;
   });
 
-  beforeEach(() => {
+  beforeEach(async () => {
     for (
       const file of [
         "./test/fixtures/direct-import/mod.ts",
         "./test/fixtures/direct-import/lib.ts",
       ]
     ) {
-      const content = readTextFileSyncOriginal(file);
-      Deno.writeTextFileSync(new URL(URI.from(file)), content);
+      const content = await readTextFileOriginal(file);
+      await Deno.writeTextFile(new URL(URI.from(file)), content);
     }
   });
 
@@ -88,8 +90,8 @@ describe("commitAll()", () => {
     output = [];
   });
 
-  it("no grouping", () => {
-    commitAll(updates);
+  it("no grouping", async () => {
+    await commitAll(updates);
     assertEquals(DenoCommandStub.commands.length, 2);
     assertArrayIncludes(
       DenoCommandStub.commands,
@@ -100,8 +102,8 @@ describe("commitAll()", () => {
     );
   });
 
-  it("group by dependency name", () => {
-    commitAll(updates, {
+  it("group by dependency name", async () => {
+    await commitAll(updates, {
       groupBy: (update) => update.name,
       composeCommitMessage: ({ group }) => `build(deps): update ${group}`,
     });
@@ -119,8 +121,8 @@ describe("commitAll()", () => {
     );
   });
 
-  it("group by module (file) name", () => {
-    commitAll(updates, {
+  it("group by module (file) name", async () => {
+    await commitAll(updates, {
       groupBy: (update) => URI.relative(update.referrer),
       composeCommitMessage: ({ group }) => `build(deps): update ${group}`,
     });
diff --git a/lib/x/cliffy.ts b/lib/x/cliffy.ts
index ba1c8034..2edb1022 100644
--- a/lib/x/cliffy.ts
+++ b/lib/x/cliffy.ts
@@ -2,3 +2,4 @@ export { Command } from "https://deno.land/x/cliffy@v1.0.0-rc.3/command/command.
 export { colors } from "https://deno.land/x/cliffy@v1.0.0-rc.3/ansi/colors.ts";
 export { Select } from "https://deno.land/x/cliffy@v1.0.0-rc.3/prompt/select.ts";
 export { List } from "https://deno.land/x/cliffy@v1.0.0-rc.3/prompt/list.ts";
+export { Input } from "https://deno.land/x/cliffy@v1.0.0-rc.3/prompt/input.ts";
diff --git a/lib/x/dax.ts b/lib/x/dax.ts
new file mode 100644
index 00000000..ac0f1151
--- /dev/null
+++ b/lib/x/dax.ts
@@ -0,0 +1 @@
+export { $ } from "https://deno.land/x/dax@0.35.0/mod.ts";