Daf·thunk – open-source Editor for Prototyping Workflows on Cloudflare

Hacker News

Over the past few months, a student and I set out to explore the impact of vibe coding on web development. Somewhere along the way, we ended up building Daf·thunk, a visual workflow editor. It leverages Cloudflare’s fantastic infrastructure (Workers, D1, KV, Workflows, AI, etc.) to create surprisingly robust workflows that can be triggered manually, via HTTP requests, by email, or on a schedule. During development, we primarily used Cursor with its agent and tab modes, alongside Claude Sonnet 3.5, 3.7, 4, and Gemini 2.5 Pro. Occasionally, we switched to MAX Mode when working on or reviewing more complex changes. We tried to regularly refine our Cursor rules and began applying specific rules to different parts of the codebase (backend, frontend, database, etc.). We also indexed documentation and used it extensively in prompts. For large refactors, we often referenced previous commits to reapply patterns elsewhere in the code. Overall, we feel that prompting for small, incremental, and easy-to-review changes scales well when coding with LLMs and the results are really impressive. In this regard, Andrej Karpathy’s talk “Software Is Changing (Again)” resonates deeply. John Ousterhout’s concept of deep modules has also been a useful mental model. Our Cursor rules ask for simple APIs that hide rich internal logic, and avoid wide interfaces that mirror implementation details. Aside from frequent commits, we didn’t document our process much, as we were mainly exploring and building intuition around what works and what doesn’t. Since we chose to trust the LLM more than usual, we’ve released everything under an open source license and without warranty. As models improved, our reliance on unit tests dropped, which will probably come back to haunt us soon... contributions are welcome ;) GitHub repository: https://github.com/dafthunk-com/dafthunk Product Hunt page: https://www.producthunt.com/products/dafthunk?launch=dafthun...

Visit product View on Hacker NewsJun 27, 2025

Share card

Actual performance

15points

1comments

Made the leaderboard

Launch Intel predictions

Analyze your own launch →

Product HuntOn track for Day 1 leaderboard · Strong signals: agent, cursor, claude · Missing: mac, agents, macos

99%99% predicted probability of success on Product Hunt, based on ML models trained on real launch data.

best fitHighest predicted score across all platforms for this description.

Indie HackersFits the IH revenue-focused audience · Strong signals: gemini · Missing: supports, reddit linkedin, podcasting

83%83% predicted probability of success on Indie Hackers, based on ML models trained on real launch data.

Hacker NewsMay not resonate with HN audience · Strong signals: open source, ide, io · Missing: https docs, excited, just released

46%46% predicted probability of success on Hacker News, based on ML models trained on real launch data.

nativeThis product was originally launched on this platform.

TrustMRRLess likely to generate early MRR · Strong signals: month, way · Missing: mobile apps, ios, personal

42%42% predicted probability of success on TrustMRR, based on ML models trained on real launch data.

AppSumoMay struggle as an AppSumo deal · Strong signals: occasional, interface, soon · Missing: plus, platform, intuitive

31%31% predicted probability of success on AppSumo, based on ML models trained on real launch data.

Acquire.comPre-revenue stage for this audience · Strong signals: arr · Missing: mrr, revenue, profit

16%16% predicted probability of success on Acquire.com, based on ML models trained on real launch data.

BetaListMay not resonate with beta-testers · Missing: web3, chat, crypto

0%0% predicted probability of success on BetaList, based on ML models trained on real launch data.

Incorrect prediction on native model

Similar products

Usque – Open-Source Cloudflare Warp Masque Client51%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Usque – Open-Source Cloudflare Warp Masque Client

Hacker News17

Inngest 1.0 – Open-source durable workflows on every platform68%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Inngest 1.0 – Open-source durable workflows on every platform

Hacker News165

CloudFIRE – Open-Source Replacement for Cloudflare + Pubnub69%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

CloudFIRE – Open-Source Replacement for Cloudflare + Pubnub

Hacker News10

Goxel, an open-source 3D voxel editor75%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Goxel, an open-source 3D voxel editor

Hacker News71

SlideSelection, an Open Source Hooper Selection Implementation47%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

SlideSelection, an Open Source Hooper Selection Implementation

Hacker News4

Piki is now open source73%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Piki is now open source

Hacker News2

Open Source CNC Beehive With Arduino and Sensors58%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Open Source CNC Beehive With Arduino and Sensors

Hacker News1

An Open-Source Intro to WebApps Curriculum72%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

An Open-Source Intro to WebApps Curriculum

Hacker News12

An Open-Source Resource for Combating Burnout52%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

An Open-Source Resource for Combating Burnout

Hacker News1

Poll is now open-source58%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Poll is now open-source

Hacker News1

Browse all products Analyze your launch