diff --git a/.prettierrc.json b/.prettierrc.json
index a4175b70..23de5dff 100644
--- a/.prettierrc.json
+++ b/.prettierrc.json
@@ -2,5 +2,6 @@
   "semi": true,
   "singleQuote": true,
   "trailingComma": "all",
-  "printWidth": 120
+  "printWidth": 120,
+  "proseWrap": "always"
 }
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index c89492c1..669adb1b 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -4,13 +4,12 @@
 
 #### Code of Conduct
 
-This repository has adopted the Contributor Covenant as it's
-Code of Conduct. It is expected that participants adhere to it.
+This repository has adopted the Contributor Covenant as it's Code of Conduct. It is expected that participants adhere to
+it.
 
 #### Proposing a Change
 
-If you are unsure about whether or not a change is desired,
-you can create an issue. This is useful because it creates
+If you are unsure about whether or not a change is desired, you can create an issue. This is useful because it creates
 the possibility for a discussion that's visible to everyone.
 
 When fixing a bug it is fine to submit a pull request right away.
@@ -34,6 +33,11 @@ Please note that commit hooks will run automatically to perform some tasks;
 - run tests
 - build distributable files
 
+#### Windows users
+
+Make sure your editor and terminal that run the tests are set to `Powershell 7` or above with
+`Git's Unix tools for Windows` installed. Some tests require you to be able to run `sh` and other unix commands.
+
 #### License
 
 By contributing to this repository, you agree that your contributions will be licensed under its MIT license.
diff --git a/dist/index.js b/dist/index.js
index b650f026..d6aa5db9 100644
Binary files a/dist/index.js and b/dist/index.js differ
diff --git a/dist/index.js.map b/dist/index.js.map
index 0fd01a8a..f420bac2 100644
Binary files a/dist/index.js.map and b/dist/index.js.map differ
diff --git a/src/model/__data__/versions.ts b/src/model/__data__/versions.ts
new file mode 100644
index 00000000..56ad4a9c
--- /dev/null
+++ b/src/model/__data__/versions.ts
@@ -0,0 +1,112 @@
+export const completelyValidSemanticVersions = [
+  '0.0.4',
+  '1.2.3',
+  '10.20.30',
+  '1.1.2-prerelease+meta',
+  '1.1.2+meta',
+  '1.1.2+meta-valid',
+  '1.0.0-alpha',
+  '1.0.0-beta',
+  '1.0.0-alpha.beta',
+  '1.0.0-alpha.beta.1',
+  '1.0.0-alpha.1',
+  '1.0.0-alpha0.valid',
+  '1.0.0-alpha.0valid',
+  '1.0.0-alpha-a.b-c-somethinglong+build.1-aef.1-its-okay',
+  '1.0.0-rc.1+build.1',
+  '2.0.0-rc.1+build.123',
+  '1.2.3-beta',
+  '10.2.3-DEV-SNAPSHOT',
+  '1.2.3-SNAPSHOT-123',
+  '1.0.0',
+  '2.0.0',
+  '1.1.7',
+  '2.0.0+build.1848',
+  '2.0.1-alpha.1227',
+  '1.0.0-alpha+beta',
+  '1.2.3----RC-SNAPSHOT.12.9.1--.12+788',
+  '1.2.3----R-S.12.9.1--.12+meta',
+  '1.2.3----RC-SNAPSHOT.12.9.1--.12',
+  '1.0.0+0.build.1-rc.10000aaa-kk-0.1',
+  '99999999999999999999999.999999999999999999.99999999999999999',
+  '1.0.0-0A.is.legal',
+];
+
+export const notCompletelyValidSemanticVersions = [
+  '1',
+  '1.2',
+  '1.2.3-0123',
+  '1.2.3-0123.0123',
+  '1.1.2+.123',
+  '+invalid',
+  '-invalid',
+  '-invalid+invalid',
+  '-invalid.01',
+  'alpha',
+  'alpha.beta',
+  'alpha.beta.1',
+  'alpha.1',
+  'alpha+beta',
+  'alpha_beta',
+  'alpha.',
+  'alpha..',
+  'beta',
+  '1.0.0-alpha_beta',
+  '-alpha.',
+  '1.0.0-alpha..',
+  '1.0.0-alpha..1',
+  '1.0.0-alpha...1',
+  '1.0.0-alpha....1',
+  '1.0.0-alpha.....1',
+  '1.0.0-alpha......1',
+  '1.0.0-alpha.......1',
+  '01.1.1',
+  '1.01.1',
+  '1.1.01',
+  '1.2',
+  '1.2.3.DEV',
+  '1.2-SNAPSHOT',
+  '1.2.31.2.3----RC-SNAPSHOT.12.09.1--..12+788',
+  '1.2-RC-SNAPSHOT',
+  '-1.0.3-gamma+b7718',
+  '+justmeta',
+  '9.8.7+meta+meta',
+  '9.8.7-whatever+meta+meta',
+  '99999999999999999999999.999999999999999999.99999999999999999----RC-SNAPSHOT.12.09.1--------------------------------..12',
+];
+
+const addVariantsPrependingV = (array: string[]) => array.map((tag) => [tag, `v${tag}`]).flat();
+
+/**
+ * Array of versions that will be detected as version tags. Not all of these are
+ * "semantic versions", but can be used to generate one. Especially using the
+ * `versioning: Semantic` option.
+ */
+export const validVersionTagInputs = addVariantsPrependingV([
+  '0',
+  '1',
+  '0.1',
+  '1.0',
+  '1.1.0',
+  '1.2.3',
+  ...completelyValidSemanticVersions,
+]);
+
+export const invalidVersionTagInputs = addVariantsPrependingV([
+  '+invalid',
+  '-invalid',
+  '-invalid+invalid',
+  '-invalid.01',
+  'alpha',
+  'alpha.beta',
+  'alpha.beta.1',
+  'alpha.1',
+  'alpha+beta',
+  'alpha_beta',
+  'alpha.',
+  'alpha..',
+  'beta',
+  '-alpha.',
+  '-1.0.3-gamma+b7718',
+  '+justmeta',
+]);
diff --git a/src/model/versioning.test.ts b/src/model/versioning.test.ts
index 5cd7f857..0451c74f 100644
--- a/src/model/versioning.test.ts
+++ b/src/model/versioning.test.ts
@@ -2,6 +2,7 @@ import * as core from '@actions/core';
 import NotImplementedException from './error/not-implemented-exception';
 import System from './system';
 import Versioning from './versioning';
+import { validVersionTagInputs, invalidVersionTagInputs } from './__data__/versions';
 
 afterEach(() => {
   jest.restoreAllMocks();
@@ -34,6 +35,26 @@ describe('Versioning', () => {
     });
   });
 
+  describe('grepCompatibleInputVersionRegex', () => {
+    // eslint-disable-next-line unicorn/consistent-function-scoping
+    const matchInputUsingGrep = async (input) => {
+      const output = await System.run('sh', undefined, {
+        input: Buffer.from(`echo '${input}' | grep -E '${Versioning.grepCompatibleInputVersionRegex}'`),
+        silent: true,
+      });
+
+      return output.trim();
+    };
+
+    it.concurrent.each(validVersionTagInputs)(`accepts valid tag input '%s'`, async (input) => {
+      expect(await matchInputUsingGrep(input)).toStrictEqual(input);
+    });
+
+    it.concurrent.each(invalidVersionTagInputs)(`rejects non-version tag input '%s'`, async (input) => {
+      await expect(async () => matchInputUsingGrep(input)).rejects.toThrowError(/^Failed to run/);
+    });
+  });
+
   describe('branch', () => {
     it('returns headRef when set', () => {
       const headReference = jest.spyOn(Versioning, 'headRef', 'get').mockReturnValue('feature-branch-1');
diff --git a/src/model/versioning.ts b/src/model/versioning.ts
index a4f858b6..7ef0ca47 100644
--- a/src/model/versioning.ts
+++ b/src/model/versioning.ts
@@ -17,6 +17,10 @@ export default class Versioning {
     return { None: 'None', Semantic: 'Semantic', Tag: 'Tag', Custom: 'Custom' };
   }
 
+  static get grepCompatibleInputVersionRegex() {
+    return '^v?([0-9]+\\.)*[0-9]+.*';
+  }
+
   /**
    * Get the branch name of the (related) branch
    */
@@ -272,18 +276,20 @@ export default class Versioning {
   }
 
   /**
-   * Whether or not the repository has any version tags yet.
+   * Whether the current tree has any version tags yet.
+   *
+   * Note: Currently this is run in all OSes, so the syntax must be cross-platform.
    */
   static async hasAnyVersionTags() {
-    const numberOfCommitsAsString = await System.run('sh', undefined, {
-      input: Buffer.from('git tag --list --merged HEAD | grep v[0-9]* | wc -l'),
+    const numberOfTagsAsString = await System.run('sh', undefined, {
+      input: Buffer.from(`git tag --list --merged HEAD | grep -E '${this.grepCompatibleInputVersionRegex}' | wc -l`),
       cwd: this.projectPath,
       silent: false,
     });
 
-    const numberOfCommits = Number.parseInt(numberOfCommitsAsString, 10);
+    const numberOfTags = Number.parseInt(numberOfTagsAsString, 10);
 
-    return numberOfCommits !== 0;
+    return numberOfTags !== 0;
   }
 
   /**