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What I Have Learned After $300 With Agentic Coding

With a Bonus of 14 Tips to be more effective with AI.

Why We Need to Talk About Vibe Coding

"We are in the middle of a transition from traditional overflow coding to vibe coding, and that's actually a real thing."โ€” from the video

I want to share something thatโ€™s been growing louder in my head over the past weeks of intense development: Weโ€™re not coding like we used to. Weโ€™re entering a new eraโ€”one where junior and senior developers work completely differently, especially with AI. Weย mustย understand this change to know where we stand in the years to come.

After three weeks of working with Claude Code in production, spending over $300, and spending a handful of weekends on a real release, Iโ€™ve learned lessons I wish someone had told me upfront. What I discovered wasnโ€™t just about saving money or coding fasterโ€”it was about rethinking what itย meansย to be a developer in 2025.

Weโ€™re moving toward what I call vibe coding. Itโ€™s not just a flashy term. Itโ€™s a signal that a shift is happening in how we create software. Whether youโ€™re a junior trying to break in or a senior navigating this AI-driven shift, it matters.

What I Did, and What You Can Apply Today

"I created not just more output, but more correct output, and I was actually focusing while the AI was creating that output."

Hereโ€™s a personal breakdown of what worked and what I wish I had known earlier. These will help if youโ€™re diving into Claude Code or any AI pair-programmer.

Be strict about your language

Stick to TypeScript over JavaScript whenever possible. This is non-negotiable. Itโ€™s not just about personal preference โ€” strict typings make it significantly easier for the AI to reason about your code. Type information dramatically reduces ambiguity and increases reliability in AI-generated code.

Keep components isolated

Each React component deserves its own file. Donโ€™t try to optimize by cramming multiple things into one place โ€” that just confuses the model. When the AI has clear entry points and boundaries, its understanding improves, and your prompts become simpler and more precise.

Use context files generously

Think of context files as lightweight domain documents that help the AI onboard your project. Whether you handle API interactions, component structures, or translation logic, these context files act as powerful signals that guide the AI to make informed, consistent decisions across prompts.

Tests are more important than ever

Even if youโ€™ve been skeptical about testing in the past, now is the time to embrace it. Tests aren't just for humans anymore. The AI can run them, check for regressions, and use them as a specification to guide its implementation. Test-driven development works well with Claude because it forces clarity.

Let the AI fix its own errors

When Claude finishes a task, donโ€™t just jump in and clean things up manually. Instead, ask it to check its own output. Let it run the compiler and tests to see where things break, and then tell it to fix the issues itself. That self-contained feedback loop is a significant time-saver.

Work in small batches

Break your work into narrow scopes. Instead of migrating your whole component library in one go, do it piece by piece. Smaller scopes mean more straightforward prompts, lower token counts, and better, faster results. You stay in control, and your budget thanks you too.

Donโ€™t expect perfection

AI isnโ€™t magic. If your codebase has inconsistencies or legacy hacks, Claude will trip over them just like a junior developer would. Be realistic. The better your base, the better the AIโ€™s output. Donโ€™t set yourself up for disappointment by assuming perfect results every time.

Avoid multitasking

Itโ€™s tempting to save time by asking Claude to do multiple things in one go, but resist. Stick to a single goal per prompt. It makes your intention clear and helps Claude produce cleaner, more focused code thatโ€™s easier to review.

Reset context often

Claudeโ€™s context limit is real and expensive. When you finish a task, clear the context before moving on. This keeps the token count low, avoids drift, and ensures each task starts fresh without excess baggage from earlier prompts.

Use comments wisely again

Comments are back โ€” but not the kind that explain what the code is doing. Thatโ€™s redundant. Instead, write comments that explain why specific code exists. These comments serve as subtle but powerful guidance for Claude, helping it understand intent and architectural decisions.

Accept the AIโ€™s style

Claude will try to follow your coding style, but it wonโ€™t be pixel-perfect. Thatโ€™s fine. This is like working with a teammate who understands the general guidelines but has their own flavor. If the code is readable, consistent, and thoroughly tested, let it go.

Plan before prompting

Donโ€™t rush to the prompt box. Take a few minutes to think. Write down which files will be involved. Draft the task description in your own words. When youโ€™re clear on the what and why, youโ€™ll write better prompts โ€” and Claude will respond with better code.

Donโ€™t fall into premature vibing

Weโ€™re not in black-box coding land yet. You still need to review, test, and understand whatโ€™s going on. Donโ€™t just prompt and ship. Stay in the flow, keep ownership of the codebase, and use AI as your assistant, not your replacement.

Break down large changes

Refactors that touch dozens or hundreds of files? Donโ€™t even try to prompt those in one go. Break them into logical steps. Do one type of change, verify, then move to the next. This not only keeps you sane, but it also prevents subtle bugs and token overflows.

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What I Learned and Where Weโ€™re Headed

"The junior developers of today will be the senior developers of tomorrow โ€” but not the seniors we know today."

This isnโ€™t a slight shift, itโ€™s a structural transformation. Weโ€™re heading into a future where:

  • AI-assisted flow coding dominates the near term (next 5โ€“10 years)

  • Vibe coding will emerge in parallel, more like high-level prompts, less like writing code

  • Juniors may skip parts of the traditional learning journey entirely

And that scares me. If we donโ€™t build proper systems to mentor, train, and level up new engineersย in this new environment, weโ€™re not just creating codeโ€”weโ€™re creating chaos.

Key Takeaways / Learnings

AI won't save destructive code. It reflects what you give it, junk in, junk out.

Plan clearly. The more structured your thinking, the better the AI performs.

Context matters. Use comments, context files, and tests to guide the AI.

Work in small chunks. It's cheaper, safer, and more predictable.

Let go of control selectively. AI won't code exactly like you. If it's readable and tested, thatโ€™s enough.

Junior developers need new paths.ย We need to support a new kind of learning, one that works in AI-powered teams.

You are still the human in the loop. Use that advantage. Use your judgment. That's your edge.


Where do you see yourself in this shift? Are you clinging to the flow, or already vibing? Let me know how youโ€™re working with AI today and what you need to learn next.

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