feat: add Medium deep link support

[kashyap-savaliya]

🆕 What's Added

This PR introduces Medium deep-link support.
It enables opening Medium articles and profiles directly in the native Medium app when installed, with safe fallback to the web.

🔗 Supported URL patterns

• https://medium.com/@username - User profiles
• https://medium.com/@username/article-slug - User articles
• https://medium.com/publication-name/article-slug - Publication articles
• https://username.medium.com/article-slug - Custom domain articles

🛠 Implementation details

• Introduces a new mediumHandler following the existing handler pattern
• Generates platform-specific deep links:
  • iOS: medium:// scheme with path preservation
  • Android: intent:// with package com.medium.reader and fallback URL
• Handles multiple Medium URL formats (user profiles, publications, custom domains)
• Includes error handling for URL parsing edge cases
• Plugged the handler into the handler registry
• Added medium to Platform type union

🧪 Testing

• Tested locally using the demo app (pnpm dev → localhost:5173)
• Verified URL pattern matching for all supported formats
• Verified deep link generation for iOS and Android
• No linting errors

📝 Files Changed

• packages/core/src/platforms/medium.ts - New handler implementation
• packages/core/src/types.ts - Added 'medium' to Platform type
• packages/core/src/platforms/index.ts - Exported mediumHandler
• packages/core/src/index.ts - Registered mediumHandler in handlers array

🙌 Thank You @mdsaban

Happy to contribute Medium platform support to expand the library's coverage. Open to feedback and improvements!

Summary by CodeRabbit

New Features

• Added Medium platform support for generating platform-specific deep links to user profiles, publications, and custom subdomains on iOS and Android.

[coderabbitai]

📝 Walkthrough

Walkthrough

This PR adds Medium platform support to the deep link generation system by introducing a new platform handler that detects Medium URLs and converts them into platform-specific deep links for iOS and Android devices.

Changes

Cohort / File(s)	Summary
Medium Platform Handler packages/core/src/platforms/medium.ts	New handler with regex-based URL matching for Medium user profiles, publications, and custom subdomains. Builds iOS deep links as medium://<path> and Android intent URLs with browser fallback.
Handler Integration packages/core/src/index.ts, packages/core/src/platforms/index.ts	Imported and registered mediumHandler in the handlers array and platform exports.
Type System packages/core/src/types.ts	Extended Platform union type to include 'medium' as a valid platform identifier.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

Possibly related PRs

• Added reddit handler #27: Adds Reddit platform handler using the same pattern of handler implementation and core file updates.
• feat(telegram): add telegram deep link handler #26: Introduces a platform handler following the identical code-level structure for handler registration and type extensions.
• feat: add Threads deep link support(#32) #41: Adds Threads platform handler with parallel updates to index.ts, platforms/index.ts, and types.ts.

Suggested reviewers

• mdsaban

Poem

🐰 A Medium tale, now within our reach,
Deep links built for iOS and Android's beach,
With regex patterns matching profiles so bright,
Intent URLs guide users to content just right! 📱✨

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The pull request title accurately describes the main change: adding Medium platform support with deep link functionality, which aligns perfectly with the changeset.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[coderabbitai]

Actionable comments posted: 1

🤖 Fix all issues with AI agents

In `@packages/core/src/platforms/medium.ts`:
- Line 50: The iosDeepLink constant currently builds a custom-scheme URL
(`iosDeepLink = \`medium://${path}\``) which is unsupported by Medium; change
the logic that sets iosDeepLink so it uses the canonical HTTPS webUrl (the
Universal Link) instead of a medium:// scheme, and ensure the function that
returns platform-specific links (referencing iosDeepLink and webUrl) returns
either the webUrl (or null for explicitly unsupported platforms) rather than a
custom-scheme deep link; also remove any ad-hoc leading-slash stripping for iOS
because Universal Links use the standard web path.

🧹 Nitpick comments (1)

packages/core/src/platforms/medium.ts (1)

36-36: match parameter is unused in build.

The build method re-parses the URL from webUrl instead of using the already-captured groups in match. While functionally correct, using match groups directly would be more consistent with the DeepLinkHandler interface contract and avoid redundant parsing.

[kashyap-savaliya]

@mdsaban Could you please review my PR