Launch of the Beta Version of the Smart Project Estimation Agent
Discover 'Smart Project Estimation (Beta)' - our intelligent analytical agent that helps you structure requirements and get a preliminary project estimate in one click. Accelerate project initiation and avoid endless discussions.
Authors: slavb18
Vibe Coding: From Idea to a Working Prototype in a Couple of Hours
Today, speed is more important than endless architectural discussions. We launched the beta version of Smart Project Estimation - a tool that structures chaotic requirements and estimates project scope in just a couple of minutes.
The most interesting part here isn't just the functionality, but how it was built. This is pure vibe coding.
Tooling: Google AI Studio
The prototype was created in Google AI Studio. The core feature of this approach is that you "code" in a dialogue with a model that allows you to run and test the code immediately. There are other solutions like Lovable, but AI Studio was handy and did the job perfectly.
The process is as simple as it gets:
- Generate logic in AI Studio.
- Commit to GitHub.
- Deploy to Vercel.
Architecture (or rather, the lack of it)
Let's be honest: the code structure here is "terrible."
- No DI (Dependency Injection).
- SOLID principles didn't even pass by.
- Maintaining such code in the long run would be a nightmare.
But for a prototype, it's an ideal solution. The entire frontend lives in one massive App.tsx file, and the backend is in server.ts. It's not about "perfect code"; it's about a "working solution." As a prototype, it completely fulfills its purpose.
Building serious systems with RBAC, complex admin panels, and high reliability still requires deep engineering skills. But for testing a hypothesis, vibe coding is more than enough.
Technical Hurdles: PDF on Vercel
One issue we encountered: local PDF parsing worked perfectly, but on Vercel (in Serverless functions), it flat out refused to work. I had to "Google it" and adapt the imports.
Here's an example of the backend handler (simple, straightforward, no extra abstractions):
app.post('/api/extract-text', upload.single('file'), async (req, res) => {
try {
if (!req.file) throw new Error('File not received');
const { originalname, buffer } = req.file;
const extension = originalname.split('.').pop()?.toLowerCase();
let text = '';
if (extension === 'pdf') {
const { PDFParse } = await import('pdf-parse');
const parser = new PDFParse({ data: buffer });
const result = await parser.getText();
text = result.text;
await parser.destroy();
} else {
text = buffer.toString('utf-8');
}
res.json({ text });
} catch (error: any) {
res.status(500).json({ error: error.message });
}
});
And LLM requirement processing:
app.post('/api/ai/detail', async (req, res) => {
const { requirement } = req.body;
const response = await ai.chat.completions.create({
model: 'gpt-4o',
messages: [
{
role: "system",
content: 'Decompose requirements and return JSON: { "detailedDescription": "...", "estimate": "XS | S | M | L | XL" }'
},
{ role: "user", content: `Name: ${requirement.name}\nDescription: ${requirement.description}` }
],
response_format: { type: 'json_object' }
});
res.json(JSON.parse(response.choices[0].message.content));
});
JSON Pain and LiteLLM
Another nuance emerged when moving from working directly with Gemini to using the LiteLLM gateway (to connect OpenAI models and others).
In the original "vibe-coded" version with pure Gemini, there were almost no JSON parsing issues. But as soon as the proxy gateway was introduced, weird things started happening: extra line breaks inside values, "broken" quotes, and other artifacts that broke the standard JSON.parse.
Instead of spending hours tweaking prompts, we released the solution as an open-source library:
This is a small wrapper around the powerful @qraftr/json-repair. Why not use it directly? Because even it sometimes fails with specific LLM gateway "glitches" (like when a string is cut off in the middle or contains unescaped literals). Our utility adds a layer of heuristics that "glues" such pieces together before they hit the main parser.
Conclusion
The biggest market shift right now isn't just the existence of AI. It's the fact that the speed gap between teams has become x5-x10. While some argue over which framework is "more correct," others use vibe coding to test a hypothesis and gather feedback.
We look forward to your feedback! If the project "takes off," we'll rewrite it according to SOLID. For now - enjoy, it works!