Markdown feature flags your coding agent installs for you
Open source feature flags as markdown files in your repo: the flag, the reason, the decision in one file, reviewed in a PR. One command, no account, so your coding agent can finish the install. A/B tests wait in the same files until you have traffic.
A while back I asked Claude Code to add feature flags to a project. It got to the part where most flag tools want you to create an account, grab an API key, etc., and basically gave up and wrote `process.env.SHOW_NEW_CHECKOUT` instead.
That was the thing that got us thinking about Dif. Dif keeps flags in your repo as markdown files. They get reviewed in PRs like everything else. You can install it with one command, there's no signup or API key required, and coding agents can actually use it without getting stuck halfway through.
`dif init` also adds some instructions to `agents.md`, and we generate a `context.json` on each build so the agent has a better idea of what flags exist, what's been removed, and what's already been tried. A/B tests live in the same setup too, even if you're not ready to run them yet.
The self-hosted version is free. The cloud piece is for getting a view across projects and having Dif propose changes, but those still come back through PRs. Git stays the source of truth.
Would genuinely love the critical version of the feedback here: would you use this? If not, what would stop you? And what are you using today that we'd need to be better than?
We'll be around all day.
About dif.sh on Product Hunt
“Markdown feature flags your coding agent installs for you”
dif.sh launched on Product Hunt on September 5th, 2026 and earned 201 upvotes and 17 comments, earning #1 Product of the Day. Open source feature flags as markdown files in your repo: the flag, the reason, the decision in one file, reviewed in a PR. One command, no account, so your coding agent can finish the install. A/B tests wait in the same files until you have traffic.
On the analytics side, dif.sh competes within Open Source, Developer Tools, Artificial Intelligence and GitHub — topics that collectively have 1.1M followers on Product Hunt. The dashboard above tracks how dif.sh performed against the three products that launched closest to it on the same day.
Who hunted dif.sh?
dif.sh was hunted by fmerian. 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 dif.sh including community comment highlights and product details, visit the product overview.
fmerian
Hey Product Hunt. David here, one of the makers.
A while back I asked Claude Code to add feature flags to a project. It got to the part where most flag tools want you to create an account, grab an API key, etc., and basically gave up and wrote `process.env.SHOW_NEW_CHECKOUT` instead.
That was the thing that got us thinking about Dif. Dif keeps flags in your repo as markdown files. They get reviewed in PRs like everything else. You can install it with one command, there's no signup or API key required, and coding agents can actually use it without getting stuck halfway through.
`dif init` also adds some instructions to `agents.md`, and we generate a `context.json` on each build so the agent has a better idea of what flags exist, what's been removed, and what's already been tried. A/B tests live in the same setup too, even if you're not ready to run them yet.
The self-hosted version is free. The cloud piece is for getting a view across projects and having Dif propose changes, but those still come back through PRs. Git stays the source of truth.
Would genuinely love the critical version of the feedback here: would you use this? If not, what would stop you? And what are you using today that we'd need to be better than?
We'll be around all day.