This product was not featured by Product Hunt yet. It will not be visible on their landing page and won't be ranked (cannot win product of the day regardless of upvotes).
convention.sh is a hosted MCP server with 27 hand-tuned TypeScript conventions. Coding agents like Claude Code, Cursor, Codex, and Amp pull conventions just-in-time — so they don't thrash and you don't pay for tokens you don't need. Benchmarked on Claude Opus 4.7 to produce production-ready code 59% faster, 44% cheaper, and with 84% fewer input tokens vs baseline. Free tier available, no credit card required.
Hey PH! 👋 I'm Ryan, one of the engineers behind convention.sh.
The spark for this came from watching AI coding agents repeatedly make the same TypeScript mistakes — reaching for any, skipping runtime validation, writing optional fields where discriminated unions belong, and overall being sloppy. The usual suspects.
Rather than paste a wall of rules into every prompt (and burn tokens on rules the agent doesn't need), we built a hosted MCP server that delivers exactly the convention the agent needs, exactly when it needs it. 27 conventions so far, all hand-tuned.
Free tier is available with no credit card required — get started by adding convention.sh to your IDE of choice at https://convention.sh
The "just-in-time" pull approach is really clever. Having the agent pull only what it needs based on what it's actually doing makes way more sense. The benchmarks are impressive - but I'm curious how they hold up across different project structures. Our codebase has a pretty opinionated setup with specific patterns for API routes, state management, and component architecture. Can you add custom conventions alongside the 27 built-in ones, or is it a fixed set?
About convention.sh on Product Hunt
“Stop AI agents from writing sloppy TypeScript”
convention.sh was submitted on Product Hunt and earned 11 upvotes and 3 comments, placing #32 on the daily leaderboard. convention.sh is a hosted MCP server with 27 hand-tuned TypeScript conventions. Coding agents like Claude Code, Cursor, Codex, and Amp pull conventions just-in-time — so they don't thrash and you don't pay for tokens you don't need. Benchmarked on Claude Opus 4.7 to produce production-ready code 59% faster, 44% cheaper, and with 84% fewer input tokens vs baseline. Free tier available, no credit card required.
convention.sh was featured in Developer Tools (512.4k followers) and Artificial Intelligence (468.5k followers) on Product Hunt. Together, these topics include over 161.7k products, making this a competitive space to launch in.
Who hunted convention.sh?
convention.sh was hunted by Ryan Huellen. 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.
Want to see how convention.sh stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Ryan Huellen