Refinar

Refinar Journal

安全なAI支援プロダクト開発、ライブプレビュー、GitHubワークフロー、そして自信を持って変更をリリースするための実践的な考え方。

英語のコンテンツ

Neon and Supabase compared on free storage, what happens when idle and the cheapest paid plan, with a highlighted row showing that password users can't move to Neon and that Lovable Cloud runs on Supabase

Neon vs Supabase for an AI-Built App (2026)

Neon vs Supabase for founders whose app came from Lovable, Bolt, Replit or v0. Which one you're on, what each costs and what breaks if you move.

8 分で読めます

Codex plans Free and Go, Plus and Pro with where Codex runs and how much each allows, beside Refinar's team plan, with Refinar's row highlighted

Codex Pricing: Plans, Usage Limits and Credits (2026)

Codex pricing explained. What Free, Go, Plus, Pro and Business include, how the 5-hour limits and credits work, and whether Codex is free.

7 分で読めます

Google Antigravity, Cursor, Claude Code and Refinar in a table showing where each one's agents run and whether it opens a pull request, with Refinar's row highlighted

Google Antigravity vs Claude Code vs Cursor in 2026

Google Antigravity vs Claude Code vs Cursor after a year of changes. Where each runs, what it costs, who reviews the work, and which suits you.

7 分で読めます

Supabase's Free, Pro and Team plans beside Lovable Cloud in a table showing price, what happens at the limit and who gets the warning email

Supabase Pricing for Founders: Free Tier Limits and Pro

Supabase pricing for founders whose app was built for them. The free tier limits, what pausing means, what Pro costs, and how Neon compares.

7 分で読めます

Four design jobs, from exploring an idea to polishing the live product, each matched to the tool that fits it and how the result is checked, with Refinar's row highlighted

Claude Code for Designers: Polish the Product You Shipped

Claude Code for designers, from how Anthropic's design team uses it to the Figma setup and what it takes to fix a product that's already live.

6 分で読めます

Four marketing jobs, from ad copy to a site in a developers' repository, each matched to the tool that fits it and who checks the result, with Refinar's row highlighted

Claude Code for Marketers: Ads, Data and Your Website

Claude Code for marketers, from how Anthropic's own team uses it to what changes when your website lives in a developer's GitHub repository.

7 分で読めます

Four product manager jobs, from understanding the codebase to changing a live product, each matched to the tool that fits it and who checks it, with Refinar's row highlighted

Claude Code for Product Managers: When the Output Is Code

Claude Code for product managers, from how Anthropic's own PMs use it to what you need before it touches a product that already has customers.

6 分で読めます

Claude Code, Codex, Cursor and GitHub Copilot in a table showing whether each reads AGENTS.md and CLAUDE.md, and what it does when a repository has both

AGENTS.md vs CLAUDE.md: Which File Does Your Agent Read?

AGENTS.md vs CLAUDE.md now that Claude Code reads AGENTS.md. Which tools read which file, what happens with both, and what belongs in them.

7 分で読めます

Claude Cowork, Claude Code, ChatGPT Work and Refinar in a table showing what each works on and who checks the result, with Refinar's row highlighted

Claude Cowork vs Claude Code: Which One Do You Need?

Claude Cowork vs Claude Code now that Cowork is part of Claude. What each does, who checks the work, what it costs, and which one fits your job.

8 分で読めます

Claude Design beside six alternatives grouped as canvas, app or your product, each marked with what it gives you and where the work goes next

6 Claude Design Alternatives for 2026, by What Comes Next

Six Claude Design alternatives for 2026, from Figma Make and Google Stitch to v0, Lovable and Refinar, sorted by what you need after the prototype.

7 分で読めます

Emergent's Free, Standard and Pro plans side by side, with a bar showing one live app's 50 credit hosting fee taking half of Standard's 100 monthly credits

Emergent Pricing 2026: Plans, Credits and Hosting Costs

Emergent pricing explained, from the Free, Standard and Pro plans to how credits get spent and what hosting and fixes cost once your app is live.

7 分で読めます

Emergent and Lovable compared row by row on what each builds, its stack, where the database lives, hosting cost and GitHub, with a highlighted Refinar row for changing the app from its GitHub repository after launch

Emergent vs Lovable (2026): Which App Builder to Choose

Emergent vs Lovable for founders: stack, mobile apps, lock-in, GitHub, pricing and what small fixes cost after launch, checked in both vendors' docs.

7 分で読めます

Cover titled How to vibe code, showing two starting points, a loop of describe one change, check it in the preview and save a point, and sign-in, payments and customer data routed to a developer

How to Vibe Code: A Step-by-Step Guide for 2026

How to vibe code step by step, for founders and PMs. Write a short spec, prompt one change at a time, fix bugs without looping and publish safely.

10 分で読めます

Lovable, Claude Code, Codex and Refinar in a table showing where you check a change and how it reaches customers, with Refinar's row highlighted

Lovable vs Claude Code vs Codex: Which Fits Your App?

Lovable vs Claude Code, plus Codex. Where your code lives, how you check a change, what each costs, and which suits a new app or one with customers.

7 分で読めます

A Lovable project syncing both ways with a GitHub repository, with a lovable-sync branch for conflicts and a separate publish step

Lovable to GitHub: How the Sync Works and What to Do Next (2026)

How Lovable's GitHub sync works, what breaks it, how to export the code without GitHub, and how to keep changing the app once it lives in a repository.

5 分で読めます

Lovable's Free, Pro and Business plans side by side, with the credit examples from Lovable's docs for a small edit and a new feature

Lovable Pricing in 2026: Plans, Credits and What a Fix Really Costs

Lovable's plans, how credits are spent, what the free plan covers, and why fixing an app costs differently from building one. Checked against Lovable's docs.

7 分で読めます

Base44 beside five alternatives, marked with whether each can open an app you already built and where its backend lives

Base44 Alternatives for the App You Already Built (2026)

What changes when you leave Base44, what its GitHub sync takes with it, and the alternatives for an app that's already live, including Base44's own Base Code.

6 分で読めます

Matter by JetBrains beside five alternatives, each marked with how it connects to your repository and how changes come back for review

JetBrains Matter Alternatives for Product Teams (2026)

Matter lets PMs and designers change a real codebase, but it's still early access. Five alternatives that work on the repo you have, and what each asks of it.

6 分で読めます

Builder.io Fusion beside five alternatives, each marked with which stacks it runs and how changes come back to your repository

Builder.io Fusion Alternatives for the App You Already Have (2026)

Fusion puts a visual AI editor on your repo, for four frameworks at per-seat prices. The alternatives that open an existing codebase, and what each changes in it.

5 分で読めます

Figma Make beside five alternatives, each marked with where it runs your app and how changes come back to your repository

Figma Make Alternatives for Your Production Codebase (2026)

Figma Make can now edit your real codebase, in a Mac-only closed beta. Five alternatives that change an existing repo today, and where each one runs your app.

6 分で読めます

Nine vibe coding tools arranged in four columns by the job they suit, starting with changing an app that already has users and moving on to a blank page, with prices checked in September 2026

Best Vibe Coding Tools in 2026, Sorted by the Job You're Doing

The best vibe coding tools in 2026, grouped by what you walk in with, with each vendor's current price and the way it charges once you start.

6 分で読めます

A ticket passing through a cloud copy of the repository to a draft pull request, with Codex, Claude Code, Cursor and Copilot listed inside the copy by where each one runs

Background Coding Agents in 2026: Codex, Claude Code, Cursor and Copilot

What background coding agents do between your request and the pull request, and how Codex cloud, Claude Code on the web, Cursor and Copilot compare.

6 分で読めます

A table of seven AI web app builders showing whether each can open an existing repository and how its code leaves, with Refinar highlighted on the first row

AI Web App Builders Compared (2026): Which Ones Work on an App You Already Have

Seven AI web app builders compared on the question most roundups skip, which is what each one can do with an app that already exists.

6 分で読めます

Cover titled Vibe coding security, the real risks in 2026, showing a 56% average security pass rate beside the four places vibe-coded apps leak and a box of checks a founder can run

Vibe Coding Security in 2026: The Real Risks and How to Check Your App

Vibe coding security with evidence: what the research and real breaches show, whether vibe coding is safe, and how a non-technical founder can check their own app.

6 分で読めます

Lovable alternatives sorted by what happens to an existing repository, with Refinar, Bolt, Replit, v0, Base44 Base Code, Cursor and Claude Code able to open it and Lovable alone creating a new one

Lovable Alternatives in 2026, Including Ones That Open the App You Already Have

Lovable alternatives for 2026, sorted by whether they can open the app you already have, with Bolt vs Lovable side by side and prices checked on each vendor's page.

6 分で読めます

An existing GitHub repository imported into v0, which works in a sandbox on a working branch and returns a pull request, with a connected Vercel project underneath holding development variables, domains and deployments

v0 GitHub Import in 2026: Using v0 on an Existing Repo, and Alternatives

v0 GitHub import in 2026: how v0 opens an existing repo, its working branches, pull requests and Vercel project, where it fits, and v0 alternatives when it doesn't.

6 分で読めます

Replit vs Lovable diagram in which an existing GitHub repository is imported into Replit, which adds .replit and replit.nix, while Lovable is blocked from it and only exports to a new repository

Replit vs Lovable in 2026: Which One Can Take the App You Already Have?

Replit vs Lovable for an app that already exists. Replit imports an existing GitHub repo, Lovable only exports to new ones. What moves, what doesn't, and prices.

6 分で読めます

Lovable vs Cursor diagram in which an existing GitHub repository opens directly in Cursor, while Lovable is blocked from it and only creates a new repository

Lovable vs Cursor in 2026: It Comes Down to the Code You Already Have

Lovable vs Cursor, decided by your existing code. Lovable can't import a GitHub repo; Cursor works in any. What each costs, using both, and a third option.

6 分で読めます

Cover titled Vibe code cleanup that stays clean, with a loop of own, secure, test, tidy and review steps around a live app marked safe to change

Vibe Code Cleanup in 2026: What to Fix After Launch and When to Hire Help

Vibe code cleanup for an AI-built app after launch: what the work involves, the evidence on AI technical debt, when to do it yourself or hire, and how to keep it clean.

6 分で読めます

Cover titled Web app security checklist for AI apps, with five ticked rows for data access, keys, sign-in, payments and dependencies passing through a gate to a box marked go live

Web App Security Checklist for AI-Built Apps (2026)

A web app security checklist for apps built with AI tools: Supabase data access, keys, sign-in, payments, dependencies and Lovable's scans, before or after go-live.

6 分で読めます

A change moving from a branch through a preview with its own URL and a staging copy on test keys, then review, before it reaches production

What Is a Staging Environment? Staging vs Production in 2026

What a staging environment is, how staging vs production differ, and the lighter setup a small team can use to change a live app without breaking it.

6 分で読めます

A product manager's work as four steps, spec, pull request, prototype and live app, with a marker after the spec showing where most AI tool lists stop

AI Tools for Product Managers in 2026, Sorted by the Job

Seven AI tools for product managers, sorted by job, from writing the spec and reading pull requests to prototyping and changing the live product.

6 分で読めます

Three routes for changing website text, where site builders use their editor, inspect element edits are gone on reload, and custom code goes through a pull request

How to Change Text on a Website in 2026, Whatever It's Built On

How to change text on website pages built in WordPress, Webflow or Framer or written in code, and why inspect element edits vanish when you refresh.

6 分で読めます