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Fibgen
Auto-generate OpenAPI docs from Go Fiber code — no comments
fibgen generates a complete OpenAPI 3.1 / 3.0 spec for Go Fiber services — with zero annotations. No @Summary comments, no codegen, no changes to your handlers. Point it at your project and get paths, params, request bodies, per-status responses, and resolved type schemas ($ref, enums, nullables). Fiber handlers are opaque at runtime, so fibgen reads the code itself via go/types, recovering types from your c.Bind() and c.JSON() calls. Fiber v2 & v3. Open source, MIT
Hey Product Hunt 👋
I built fibgen because keeping Swagger annotations in sync with handler code is a chore — and they rot the moment someone forgets a comment. I wanted docs that come from the actual code, not a parallel description of it.
The hard part: Fiber handlers are completely opaque at the type level (func(c fiber.Ctx) error), so there's nothing to reflect on at runtime. fibgen does real static analysis — it walks the route registrations, resolves group prefixes through variables, enters the handler body, and pulls types out of the c.* calls.
Would love feedback on which patterns it should learn next — interprocedural analysis (following respondJSON(c, user) helpers) is top of my list. What would make this a daily driver for you?
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About Fibgen on Product Hunt
“Auto-generate OpenAPI docs from Go Fiber code — no comments”
Fibgen was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #135 on the daily leaderboard. fibgen generates a complete OpenAPI 3.1 / 3.0 spec for Go Fiber services — with zero annotations. No @Summary comments, no codegen, no changes to your handlers. Point it at your project and get paths, params, request bodies, per-status responses, and resolved type schemas ($ref, enums, nullables). Fiber handlers are opaque at runtime, so fibgen reads the code itself via go/types, recovering types from your c.Bind() and c.JSON() calls. Fiber v2 & v3. Open source, MIT
Fibgen was featured in API (98.4k followers), Open Source (68.6k followers) and GitHub (41.3k followers) on Product Hunt. Together, these topics include over 48.4k products, making this a competitive space to launch in.
Who hunted Fibgen?
Fibgen was hunted by Xackerr. 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.
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