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Mantyl
Hand over AI-built software with proof
Mantyl compiles your repository, your coding-agent history and executed checks into a verified project passport your client can independently re-run. Every claim is labelled by who proved it. Free local-first CLI for Claude Code, Cursor and Codex. No account.
Hi Product Hunt. I'm Joel, and I built Mantyl because I kept shipping AI-assisted projects I could not honestly vouch for. The client asks what they are actually getting, and "the agent says it works" is not an answer.
Mantyl reads your repository and your coding-agent history, re-runs the setup and checks in a clean Docker sandbox, and compiles it all into a project passport. Every claim is labelled by who proved it: agent said, repository shows, or Mantyl verified. Your client runs one command, npx mantyl receive, and reproduces the proof themselves.
The part I trust most: Mantyl is verified with itself. During development its own passport caught an undocumented environment variable and a claim the code did not back up, and the passport on the homepage is a real self-run, not a mockup.
The CLI is free forever, local-first, no account, no telemetry. Hosted passports are free during launch. The signed Mantyl Verified accreditation is a one-off from £19 when a delivery needs it.
I would genuinely value feedback on the truth model and what the passport should cover next. Ask me anything.
About Mantyl on Product Hunt
“Hand over AI-built software with proof”
Mantyl was submitted on Product Hunt and earned 8 upvotes and 1 comments, placing #41 on the daily leaderboard. Mantyl compiles your repository, your coding-agent history and executed checks into a verified project passport your client can independently re-run. Every claim is labelled by who proved it. Free local-first CLI for Claude Code, Cursor and Codex. No account.
On the analytics side, Mantyl competes within SaaS, Developer Tools and Artificial Intelligence — topics that collectively have 1M followers on Product Hunt. The dashboard above tracks how Mantyl performed against the three products that launched closest to it on the same day.
Who hunted Mantyl?
Mantyl was hunted by Joel Parfitt. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Mantyl including community comment highlights and product details, visit the product overview.
Joel Parfitt