diff --git a/.github/workflows/publish-unstable.yml b/.github/workflows/publish-unstable.yml
new file mode 100644
index 000000000..2afe4a8d4
--- /dev/null
+++ b/.github/workflows/publish-unstable.yml
@@ -0,0 +1,35 @@
+# For every push to the master branch, this publishes an NPM package to the
+# "unstable" NPM tag.
+
+name: Publish Unstable
+
+on:
+  push:
+    branches:
+      - main
+
+concurrency:
+  group: ci-${{ github.head_ref || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  publish:
+    name: "NPM Publish"
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: ./.github/actions/setup
+      - name: Install Node
+        uses: actions/setup-node@v3
+        with:
+          # This creates an .npmrc that reads the NODE_AUTH_TOKEN environment variable
+          registry-url: 'https://registry.npmjs.org'
+
+      - name: set versions
+        run: node ./test-packages/unstable-release/version.js
+
+      - name: npm publish
+        run: node ./test-packages/unstable-release/publish.js
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
diff --git a/test-packages/unstable-release/.eslintrc.cjs b/test-packages/unstable-release/.eslintrc.cjs
new file mode 100644
index 000000000..bc1f19a2b
--- /dev/null
+++ b/test-packages/unstable-release/.eslintrc.cjs
@@ -0,0 +1,32 @@
+'use strict';
+
+module.exports = {
+  root: true,
+  parser: 'babel-eslint',
+  parserOptions: {
+    ecmaVersion: 2018,
+    sourceType: 'module',
+    ecmaFeatures: {
+      legacyDecorators: true,
+    },
+  },
+  extends: ['eslint:recommended', 'plugin:prettier/recommended'],
+  env: {
+    browser: true,
+  },
+  overrides: [
+    // node files
+    {
+      files: ['./.eslintrc.cjs'],
+      parserOptions: {
+        sourceType: 'script',
+      },
+      env: {
+        browser: false,
+        node: true,
+      },
+      plugins: ['node'],
+      extends: ['plugin:node/recommended'],
+    },
+  ],
+};
diff --git a/test-packages/unstable-release/README.md b/test-packages/unstable-release/README.md
new file mode 100644
index 000000000..2cbd4672b
--- /dev/null
+++ b/test-packages/unstable-release/README.md
@@ -0,0 +1,9 @@
+# @embroider/unstable-release
+
+Tools for supporting unstable releases off `main`.
+
+_The changes this package makes to the monorepo should not be committed_.
+
+```bash
+node ./test-packages/unstable-release/version.js
+```
diff --git a/test-packages/unstable-release/package.json b/test-packages/unstable-release/package.json
new file mode 100644
index 000000000..9628fb683
--- /dev/null
+++ b/test-packages/unstable-release/package.json
@@ -0,0 +1,23 @@
+{
+  "name": "@embroider/unstable-release",
+  "version": "0.0.0",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "lint:js": "eslint . --cache --config ./.eslintrc.cjs"
+  },
+  "dependencies": {
+    "execa": "^7.0.0",
+    "fs-extra": "^9.1.0",
+    "globby": "^11.0.3"
+  },
+  "volta": {
+    "extends": "../../package.json"
+  },
+  "devDependencies": {
+    "eslint": "^7.32.0",
+    "eslint-config-prettier": "^8.5.0",
+    "eslint-plugin-node": "^11.1.0",
+    "prettier": "^2.5.1"
+  }
+}
diff --git a/test-packages/unstable-release/publish.js b/test-packages/unstable-release/publish.js
new file mode 100644
index 000000000..84e11ee55
--- /dev/null
+++ b/test-packages/unstable-release/publish.js
@@ -0,0 +1,14 @@
+import { execaCommand } from 'execa';
+import { listPublicWorkspaces } from './workspaces.js';
+import { dirname } from 'path';
+
+async function publish() {
+  let publicWorkspaces = await listPublicWorkspaces();
+
+  for (let workspace of publicWorkspaces) {
+    console.info(`Publishing ${workspace}`);
+    await execaCommand('npm publish --tag=unstable --verbose', { cwd: dirname(workspace) });
+  }
+}
+
+publish();
diff --git a/test-packages/unstable-release/version.js b/test-packages/unstable-release/version.js
new file mode 100644
index 000000000..8634dc38e
--- /dev/null
+++ b/test-packages/unstable-release/version.js
@@ -0,0 +1,61 @@
+import fse from 'fs-extra';
+import { listPublicWorkspaces, currentSHA } from './workspaces.js';
+
+/**
+ * This is an I/O heavy way to do this, but hopefully it reads easy
+ *
+ * these functions change the CWD as they go, returnning to he previous
+ * CWD via finally blocks upon finish.
+ */
+async function updateVersions() {
+  let sha = await currentSHA();
+
+  let publicWorkspaces = await listPublicWorkspaces();
+
+  // Pick new versions for each package
+  for (let workspace of publicWorkspaces) {
+    console.info(`Setting version of ${workspace}`);
+    await setVersion(sha, workspace);
+  }
+
+  // Update each dependency to use the new versions
+  for (let workspace of publicWorkspaces) {
+    console.info(`Updating dependencies of ${workspace}`);
+    await updateDependencies(workspace);
+  }
+}
+
+updateVersions();
+
+////////////////////////////////////////////
+
+const NEW_VERSIONS = {};
+
+async function setVersion(sha, filePath) {
+  let json = await fse.readJSON(filePath);
+  json.version = `${json.version}-unstable.${sha}`;
+
+  NEW_VERSIONS[json.name] = json.version;
+
+  await fse.writeJSON(filePath, json, { spaces: 2 });
+}
+
+async function updateDependencies(filePath) {
+  let json = await fse.readJSON(filePath);
+
+  for (let [dep, version] of Object.entries(NEW_VERSIONS)) {
+    if ((json.dependencies || {})[dep]) {
+      json.dependencies[dep] = version;
+    }
+
+    if ((json.devDependencies || {})[dep]) {
+      json.devDependencies[dep] = version;
+    }
+
+    if ((json.peerDependencies || {})[dep]) {
+      json.peerDependencies[dep] = version;
+    }
+  }
+
+  await fse.writeJSON(filePath, json, { spaces: 2 });
+}
diff --git a/test-packages/unstable-release/workspaces.js b/test-packages/unstable-release/workspaces.js
new file mode 100644
index 000000000..d52294c8a
--- /dev/null
+++ b/test-packages/unstable-release/workspaces.js
@@ -0,0 +1,30 @@
+import globby from 'globby';
+import { execaCommand } from 'execa';
+import fse from 'fs-extra';
+
+/**
+ * All publishable packages are in packages/*
+ *
+ * We could read package.json#workspaces, but then we'd have more to filter out.
+ */
+export async function listPublicWorkspaces() {
+  let filePaths = await globby(['packages/*/package.json']);
+
+  let result = [];
+
+  for (let filePath of filePaths) {
+    let packageJson = await fse.readJSON(filePath);
+
+    if (packageJson.private) continue;
+
+    result.push(filePath);
+  }
+
+  return result;
+}
+
+export async function currentSHA() {
+  let { stdout } = await execaCommand(`git rev-parse --short HEAD`);
+
+  return stdout.trim();
+}
diff --git a/yarn.lock b/yarn.lock
index 02d324244..46cc64273 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5409,26 +5409,7 @@ browserslist-generator@^1.0.66:
     semver "^7.3.7"
     ua-parser-js "^1.0.2"
 
-browserslist@4.20.2:
-  version "4.20.2"
-  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.20.2.tgz#567b41508757ecd904dab4d1c646c612cd3d4f88"
-  integrity sha512-CQOBCqp/9pDvDbx3xfMi+86pr4KXIf2FDkTTdeuYw8OxS9t898LA1Khq57gtufFILXpfgsSx5woNgsBgvGjpsA==
-  dependencies:
-    caniuse-lite "^1.0.30001317"
-    electron-to-chromium "^1.4.84"
-    escalade "^3.1.1"
-    node-releases "^2.0.2"
-    picocolors "^1.0.0"
-
-browserslist@^3.2.6:
-  version "3.2.8"
-  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-3.2.8.tgz#b0005361d6471f0f5952797a76fc985f1f978fc6"
-  integrity sha512-WHVocJYavUwVgVViC0ORikPHQquXwVh939TaelZ4WDqpWgTX/FsGhl/+P4qBUAGcRvtOgDgC+xftNWWp2RUTAQ==
-  dependencies:
-    caniuse-lite "^1.0.30000844"
-    electron-to-chromium "^1.3.47"
-
-browserslist@^4.0.0, browserslist@^4.14.5, browserslist@^4.20.4, browserslist@^4.21.3, browserslist@^4.21.4:
+browserslist@4.20.2, browserslist@^3.2.6, browserslist@^4.0.0, browserslist@^4.14.0, browserslist@^4.14.5, browserslist@^4.20.4, browserslist@^4.21.3, browserslist@^4.21.4:
   version "4.21.5"
   resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.21.5.tgz#75c5dae60063ee641f977e00edd3cfb2fb7af6a7"
   integrity sha512-tUkiguQGW7S3IhB7N+c2MV/HZPSCPAAiYBZXLsBhFB/PCy6ZKKsZrmBayHV9fdGV/ARIfJ14NkxKzRDjvp7L6w==
@@ -5587,11 +5568,6 @@ caniuse-lite@^1.0.0, caniuse-lite@^1.0.30001328:
   resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001439.tgz#ab7371faeb4adff4b74dad1718a6fd122e45d9cb"
   integrity sha512-1MgUzEkoMO6gKfXflStpYgZDlFM7M/ck/bgfVCACO5vnAf0fXoNVHdWtqGU+MYca+4bL9Z5bpOVmR33cWW9G2A==
 
-caniuse-lite@^1.0.30000844, caniuse-lite@^1.0.30001317:
-  version "1.0.30001458"
-  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001458.tgz#871e35866b4654a7d25eccca86864f411825540c"
-  integrity sha512-lQ1VlUUq5q9ro9X+5gOEyH7i3vm+AYVT1WDCVB69XOZ17KZRhnZ9J0Sqz7wTHQaLBJccNCHq8/Ww5LlOIZbB0w==
-
 caniuse-lite@^1.0.30001449:
   version "1.0.30001457"
   resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001457.tgz#6af34bb5d720074e2099432aa522c21555a18301"
@@ -6693,11 +6669,6 @@ ee-first@1.1.1:
   resolved "https://registry.yarnpkg.com/ee-first/-/ee-first-1.1.1.tgz#590c61156b0ae2f4f0255732a158b266bc56b21d"
   integrity sha512-WMwm9LhRUo+WUaRN+vRuETqG89IgZphVSNkdFgeb6sS/E4OrDIN7t48CAewSHXc6C8lefD8KKfr5vY61brQlow==
 
-electron-to-chromium@^1.3.47, electron-to-chromium@^1.4.84:
-  version "1.4.315"
-  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.4.315.tgz#b60a6676b3a1db332cfc8919118344aa06b9ac99"
-  integrity sha512-ndBQYz3Eyy3rASjjQ9poMJGoAlsZ/aZnq6GBsGL4w/4sWIAwiUHVSsMuADbxa8WJw7pZ0oxLpGbtoDt4vRTdCg==
-
 electron-to-chromium@^1.4.284:
   version "1.4.302"
   resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.4.302.tgz#5770646ffe7051677b489226144aad9386d420f2"
@@ -9007,6 +8978,21 @@ execa@^5.0.0, execa@^5.1.1:
     signal-exit "^3.0.3"
     strip-final-newline "^2.0.0"
 
+execa@^7.0.0:
+  version "7.0.0"
+  resolved "https://registry.yarnpkg.com/execa/-/execa-7.0.0.tgz#2a44e20e73797f6c2df23889927972386157d7e4"
+  integrity sha512-tQbH0pH/8LHTnwTrsKWideqi6rFB/QNUawEwrn+WHyz7PX1Tuz2u7wfTvbaNBdP5JD5LVWxNo8/A8CHNZ3bV6g==
+  dependencies:
+    cross-spawn "^7.0.3"
+    get-stream "^6.0.1"
+    human-signals "^4.3.0"
+    is-stream "^3.0.0"
+    merge-stream "^2.0.0"
+    npm-run-path "^5.1.0"
+    onetime "^6.0.0"
+    signal-exit "^3.0.7"
+    strip-final-newline "^3.0.0"
+
 exit@^0.1.2:
   version "0.1.2"
   resolved "https://registry.yarnpkg.com/exit/-/exit-0.1.2.tgz#0632638f8d877cc82107d30a0fff1a17cba1cd0c"
@@ -9873,7 +9859,7 @@ get-stream@^5.0.0, get-stream@^5.1.0:
   dependencies:
     pump "^3.0.0"
 
-get-stream@^6.0.0:
+get-stream@^6.0.0, get-stream@^6.0.1:
   version "6.0.1"
   resolved "https://registry.yarnpkg.com/get-stream/-/get-stream-6.0.1.tgz#a262d8eef67aced57c2852ad6167526a43cbf7b7"
   integrity sha512-ts6Wi+2j3jQjqi70w5AlN8DFnkSwC+MqmxEzdEALB2qXZYV3X/b1CTfgPLGJNMeAWxdPfU8FO1ms3NUfaHCPYg==
@@ -10106,7 +10092,7 @@ got@^9.6.0:
     to-readable-stream "^1.0.0"
     url-parse-lax "^3.0.0"
 
-graceful-fs@^4.1.2, graceful-fs@^4.1.3, graceful-fs@^4.1.5, graceful-fs@^4.1.6, graceful-fs@^4.1.9, graceful-fs@^4.2.0, graceful-fs@^4.2.2, graceful-fs@^4.2.4, graceful-fs@^4.2.9:
+graceful-fs@^4.0.0, graceful-fs@^4.1.2, graceful-fs@^4.1.3, graceful-fs@^4.1.5, graceful-fs@^4.1.6, graceful-fs@^4.1.9, graceful-fs@^4.2.0, graceful-fs@^4.2.2, graceful-fs@^4.2.4, graceful-fs@^4.2.9:
   version "4.2.10"
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.2.10.tgz#147d3a006da4ca3ce14728c7aefc287c367d7a6c"
   integrity sha512-9ByhssR2fPVsNZj478qUUbKfmL0+t5BDVyjShtyZZLiK7ZDAArFFfopyOTj0M05wE2tJPisA4iTnnXl2YoPvOA==
@@ -10438,6 +10424,11 @@ human-signals@^2.1.0:
   resolved "https://registry.yarnpkg.com/human-signals/-/human-signals-2.1.0.tgz#dc91fcba42e4d06e4abaed33b3e7a3c02f514ea0"
   integrity sha512-B4FFZ6q/T2jhhksgkbEW3HBvWIfDW85snkQgawt07S7J5QXTk6BkNV+0yAeZrM5QpMAdYlocGoljn0sJ/WQkFw==
 
+human-signals@^4.3.0:
+  version "4.3.0"
+  resolved "https://registry.yarnpkg.com/human-signals/-/human-signals-4.3.0.tgz#2095c3cd5afae40049403d4b811235b03879db50"
+  integrity sha512-zyzVyMjpGBX2+6cDVZeFPCdtOtdsxOeseRhB9tkQ6xXmGUNrcnBzdEKPy3VPNYz+4gy1oukVOXcrJCunSyc6QQ==
+
 iconv-lite@0.4.24, iconv-lite@^0.4.17, iconv-lite@^0.4.24:
   version "0.4.24"
   resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.4.24.tgz#2022b4b25fbddc21d2f524974a474aafe733908b"
@@ -10956,6 +10947,11 @@ is-stream@^2.0.0:
   resolved "https://registry.yarnpkg.com/is-stream/-/is-stream-2.0.1.tgz#fac1e3d53b97ad5a9d0ae9cef2389f5810a5c077"
   integrity sha512-hFoiJiTl63nn+kstHGBtewWSKnQLpyb155KHheA1l39uvtO9nWIop1p3udqPcUd/xbF1VLMO4n7OI6p7RbngDg==
 
+is-stream@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/is-stream/-/is-stream-3.0.0.tgz#e6bfd7aa6bef69f4f472ce9bb681e3e57b4319ac"
+  integrity sha512-LnQR4bZ9IADDRSkvpqMGvt/tEJWclzklNgSw48V5EAaAeDd6qGvN8ei6k5p0tvxSR171VmGyHuTiAOfxAbr8kA==
+
 is-string@^1.0.5, is-string@^1.0.7:
   version "1.0.7"
   resolved "https://registry.yarnpkg.com/is-string/-/is-string-1.0.7.tgz#0dd12bf2006f255bb58f695110eff7491eebc0fd"
@@ -12542,6 +12538,11 @@ mimic-fn@^2.1.0:
   resolved "https://registry.yarnpkg.com/mimic-fn/-/mimic-fn-2.1.0.tgz#7ed2c2ccccaf84d3ffcb7a69b57711fc2083401b"
   integrity sha512-OqbOk5oEQeAZ8WXWydlu9HJjz9WVdEIvamMCcXmuqUYjTknH/sqsWvhQ3vgwKFRR1HpjvNBKQ37nbJgYzGqGcg==
 
+mimic-fn@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/mimic-fn/-/mimic-fn-4.0.0.tgz#60a90550d5cb0b239cca65d893b1a53b29871ecc"
+  integrity sha512-vqiC06CuhBTUdZH+RYl8sFrL096vA45Ok5ISO6sE/Mr1jRbGH4Csnhi8f3wKVl7x8mO4Au7Ir9D3Oyv1VYMFJw==
+
 mimic-response@^1.0.0, mimic-response@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/mimic-response/-/mimic-response-1.0.1.tgz#4923538878eef42063cb8a3e3b0798781487ab1b"
@@ -12778,7 +12779,7 @@ node-notifier@^10.0.0:
     uuid "^8.3.2"
     which "^2.0.2"
 
-node-releases@^2.0.2, node-releases@^2.0.8:
+node-releases@^2.0.8:
   version "2.0.10"
   resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-2.0.10.tgz#c311ebae3b6a148c89b1813fd7c4d3c024ef537f"
   integrity sha512-5GFldHPXVG/YZmFzJvKK2zDSzPKhEp0+ZR5SVaoSag9fsL5YgHbUHDfnG5494ISANDcK4KwPXAx2xqVEydmd7w==
@@ -12896,6 +12897,13 @@ npm-run-path@^4.0.0, npm-run-path@^4.0.1:
   dependencies:
     path-key "^3.0.0"
 
+npm-run-path@^5.1.0:
+  version "5.1.0"
+  resolved "https://registry.yarnpkg.com/npm-run-path/-/npm-run-path-5.1.0.tgz#bc62f7f3f6952d9894bd08944ba011a6ee7b7e00"
+  integrity sha512-sJOdmRGrY2sjNTRMbSvluQqg+8X7ZK61yvzBEIDhz4f8z1TZFYABsqjjCBd/0PUNE9M6QDgHJXQkGUEm7Q+l9Q==
+  dependencies:
+    path-key "^4.0.0"
+
 npmlog@^6.0.0:
   version "6.0.2"
   resolved "https://registry.yarnpkg.com/npmlog/-/npmlog-6.0.2.tgz#c8166017a42f2dea92d6453168dd865186a70830"
@@ -13043,6 +13051,13 @@ onetime@^5.1.0, onetime@^5.1.2:
   dependencies:
     mimic-fn "^2.1.0"
 
+onetime@^6.0.0:
+  version "6.0.0"
+  resolved "https://registry.yarnpkg.com/onetime/-/onetime-6.0.0.tgz#7c24c18ed1fd2e9bca4bd26806a33613c77d34b4"
+  integrity sha512-1FlR+gjXK7X+AsAHso35MnyN5KqGwJRi/31ft6x0M194ht7S+rWAvd7PHss9xSKMzE0asv1pyIHaJYq+BbacAQ==
+  dependencies:
+    mimic-fn "^4.0.0"
+
 optionator@^0.8.1, optionator@^0.8.2:
   version "0.8.3"
   resolved "https://registry.yarnpkg.com/optionator/-/optionator-0.8.3.tgz#84fa1d036fe9d3c7e21d99884b601167ec8fb495"
@@ -13365,6 +13380,11 @@ path-key@^3.0.0, path-key@^3.1.0:
   resolved "https://registry.yarnpkg.com/path-key/-/path-key-3.1.1.tgz#581f6ade658cbba65a0d3380de7753295054f375"
   integrity sha512-ojmeN0qd+y0jszEtoY48r0Peq5dwMEkIlCOu6Q5f41lfkswXuKtYrhgoTpLnyIcHm24Uhqx+5Tqm2InSwLhE6Q==
 
+path-key@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/path-key/-/path-key-4.0.0.tgz#295588dc3aee64154f877adb9d780b81c554bf18"
+  integrity sha512-haREypq7xkM7ErfgIyA0z+Bj4AGKlMSdlQE2jvJo6huWD1EdkKYV+G/T4nq0YEF2vgTT8kqMFKo1uHn950r4SQ==
+
 path-parse@^1.0.7:
   version "1.0.7"
   resolved "https://registry.yarnpkg.com/path-parse/-/path-parse-1.0.7.tgz#fbc114b60ca42b30d9daf5858e4bd68bbedb6735"
@@ -13755,7 +13775,7 @@ qunit-dom@^2.0.0:
     ember-cli-babel "^7.23.0"
     ember-cli-version-checker "^5.1.1"
 
-qunit@^2.16.0, qunit@^2.19.1:
+qunit@^2.14.1, qunit@^2.16.0, qunit@^2.19.1:
   version "2.19.4"
   resolved "https://registry.yarnpkg.com/qunit/-/qunit-2.19.4.tgz#2d689bb1165edd4b812e3ed2ee06ff907e9f2ece"
   integrity sha512-aqUzzUeCqlleWYKlpgfdHHw9C6KxkB9H3wNfiBg5yHqQMzy0xw/pbCRHYFkjl8MsP/t8qkTQE+JTYL71azgiew==
@@ -15166,6 +15186,11 @@ strip-final-newline@^2.0.0:
   resolved "https://registry.yarnpkg.com/strip-final-newline/-/strip-final-newline-2.0.0.tgz#89b852fb2fcbe936f6f4b3187afb0a12c1ab58ad"
   integrity sha512-BrpvfNAE3dcvq7ll3xVumzjKjZQ5tI1sEUIKr3Uoks0XUl45St3FlatVqef9prk4jRDzhW6WZg+3bk93y6pLjA==
 
+strip-final-newline@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/strip-final-newline/-/strip-final-newline-3.0.0.tgz#52894c313fbff318835280aed60ff71ebf12b8fd"
+  integrity sha512-dOESqjYr96iWYylGObzd39EuNTa5VJxyvVAEm5Jnh7KGo75V43Hk1odPQkNDyXNmUR6k+gEiDVXnjB8HJ3crXw==
+
 strip-indent@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/strip-indent/-/strip-indent-3.0.0.tgz#c32e1cee940b6b3432c771bc2c54bcce73cd3001"