Restore Magnet and Onboard links

Re-added after user confirmed they are working:
- Magnet (magnet.run) - updated description to "AI-native workspace"
- Onboard (getonboardai.com) - SSL cert issue was transient

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

README.md

@@ -188,6 +188,8 @@ This is a curated list of AI-powered developer tools. These tools leverage AI to
 - [Replit Ghostwriter Chat](https://replit.com/site/ghostwriter) — Assistant built into [Replit](https://replit.com/) with chat, proactive debugging, and autocomplete. Uses OpenAI for chat and [replit-code-v1-3b](https://huggingface.co/replit/replit-code-v1-3b) (OS) for autocomplete.
 - [Sourcegraph Cody](https://about.sourcegraph.com/cody) — Assistant with chat, refactoring, and unit test generation. Extensions for VS Code and IntelliJ. Also available as a web app.
 - [Unblocked](https://getunblocked.com/) — Augment source code with relevant existing knowledge in GitHub, Slack, Jira, Confluence, and more. Get answers through chat and IDE file-level context. Available on web, macOS, Slack, VSCode, and JetBrains IDE's.
+- [Magnet](https://www.magnet.run/) — AI-native workspace for building software with repositories and issues as context.
+- [Onboard](https://www.getonboardai.com) — Chat with an AI about public and private codebases.
 - [CodeSquire](https://codesquire.ai/) — Chrome extension that adds autocomplete to Google Colab, BigQuery, and JupyterLab.
 - [Incognito Pilot](https://github.com/silvanmelchior/IncognitoPilot) — Open source assistant with built-in Python editor and interpreter.
 - [Code to Flow](https://codetoflow.com) — Visualize, analyze, and understand code with interactive flowcharts.