Vibe coding ideas · Sep 2026

Vibe coding ideas developers are already asking for

53 things to build with or for your coding agent. Each one comes from real Reddit threads, not a brainstorm.

~/next-project
❯ claude "what should I build next?"
● reading r/ClaudeAI, r/ClaudeCode, r/codex…
106 threads · ▲ 53k upvotes
5 build surfaces · 4 agents
✓ 53 ideas with proof, 22 weekend-sized
53
ideas, each linked to its threads
53k
upvotes on the source threads
22
can be built in a weekend
19
subreddits read

Pick your agent

Ideas that work with each tool

Or pick what to build

Extension points people are asking for

Build time vs. demand

Bar length = upvotes on the Reddit threads behind each idea

All 53 ideas

Open a card for build steps, stack and the source threads

Sort
▲ 5.6k
3 Reddit threads
Hook

Agent status light

Turns a lamp, menu bar icon or cursor badge red when the agent needs you and green when it's done.

Claude Code logoWeekendFree, $39 light kit
How to build it
  1. 1Send working, waiting and done states from hooks to a small local daemon.
  2. 2Map each state to a color on a smart bulb, USB light or menu bar icon.
  3. 3Sell a ready-to-use light that sets itself up with one command.
Notification hookStop hookBluetooth or USB lightBuyer: Developers who switch windows while agents run

The Reddit threads

▲ 3.3k
2 Reddit threads
Skill

Job application skill

Scores a job post against your CV, writes a tailored resume and tracks every application.

Claude Code logo>_1 to 2 weeks$29 one-time
How to build it
  1. 1Have the skill read a job URL and score it against your CV and must-haves.
  2. 2Generate a tailored resume PDF only for posts above your cutoff.
  3. 3Log each application and its status in a tracker file.
SKILL.mdResume templatePDF exportCSV trackerBuyer: Developers looking for work

The Reddit threads

▲ 3.1k
2 Reddit threads
Plugin

Plain English mode

Rewrites the agent's jargon into short, plain sentences so non-engineers know what just changed.

Claude Code logoWeekendFree, $5/mo hosted model
How to build it
  1. 1Rewrite each displayed message with a small local or hosted model.
  2. 2Keep a glossary of the project's own terms so explanations stay consistent.
  3. 3Ship it as a one-line install from a plugin marketplace.
Claude Code pluginHook on displayed messagesLocal model via OllamaBuyer: Vibe coders without a dev background

The Reddit threads

▲ 3k
3 Reddit threads
Plugin

Stack starter plugin

One install with the skills, hooks, subagents and MCP servers a specific stack needs, tested together.

Claude Code logo1 to 2 weeks$29 per stack
How to build it
  1. 1Pick one stack, such as Next.js with Supabase, and bundle only what it needs.
  2. 2Test the bundle on a fresh project so every piece works on day one.
  3. 3Sell one stack at a time and update it when the frameworks change.
Plugin marketplaceSkills and hooksMCP configBuyer: Developers starting a new project with agents

The Reddit threads

▲ 2.7k
4 Reddit threads
App

Usage limit radar

A menu bar app that shows what's left of your Claude Code, Codex and Cursor limits before a task dies mid-run.

Claude Code logo>_Cursor logo1 to 2 weeks$5/mo
How to build it
  1. 1Read the session logs each agent writes locally and count tokens per usage window.
  2. 2Show the remaining budget per tool in the menu bar, with a warning at 80%.
  3. 3Charge for history and team views once the single-user app is solid.
Tauri or SwiftLocal session logsOS notificationsBuyer: Max, Pro and Ultra subscribers

The Reddit threads

▲ 2.6k
2 Reddit threads
CLI tool

Command output compressor

A proxy that trims noisy test and build output before it floods the agent's context.

Claude Code logo>_Cursor logo1 to 2 weeksFree core, $8/mo rule packs
How to build it
  1. 1Wrap test runners, builds and git log so only failures and summaries pass through.
  2. 2Count tokens saved per session so the value is obvious.
  3. 3Sell filter packs per framework and language.
Rust or GoShell wrapperPer-command filtersBuyer: Heavy agent users on usage caps

The Reddit threads

▲ 2.3k
1 Reddit thread
MCP server

Agent-to-agent chat bridge

A shared channel where Claude Code and Codex pass work to each other instead of you copy-pasting.

Claude Code logo>_Cursor logo1 to 2 weeksFree, paid hosted rooms
How to build it
  1. 1Expose post_message and read_messages tools over MCP.
  2. 2Give each agent a role so handoffs stay in order.
  3. 3Add a web view so you can watch the thread and step in.
MCP serverWebSocketSQLiteBuyer: Developers pairing two agents

The Reddit threads

▲ 2k
2 Reddit threads
Subagent

Cheap reader subagent

Runs file reading and log digging on a cheaper model and hands the main session a short summary.

Claude Code logoWeekendFree, builds an audience
How to build it
  1. 1Define a subagent on a smaller model with read and search tools only.
  2. 2Route file searches, log reads and doc lookups to it from CLAUDE.md.
  3. 3Publish token counts before and after to show the saving.
.claude/agentsSmaller model settingRead and search tools onlyBuyer: Max and API users watching cost

The Reddit threads

▲ 2k
1 Reddit thread
Subagent

Overbuild reviewer

Reviews the finished diff and cuts wrappers, extra classes and code the standard library already covers.

Claude Code logoWeekendFree, paid language packs
How to build it
  1. 1Ask of each new block: does it need to exist, and does the standard library or a current dependency do it.
  2. 2Have the subagent return a shorter diff, not a list of comments.
  3. 3Call it at the end of every task from CLAUDE.md.
.claude/agentsgit diffRules per languageBuyer: Developers tired of bloated agent code

The Reddit threads

▲ 2k
2 Reddit threads
Skill

Design taste skill

Gives the agent one clear visual style, so new screens stop coming out as generic AI UI.

Claude Code logo>_Weekend$39 per style pack
How to build it
  1. 1Write one SKILL.md per style with type, spacing, color and component rules.
  2. 2Add reference screenshots so the agent can match the look, not just the rules.
  3. 3Give one style away and sell the rest as packs.
SKILL.mdDesign tokensReference screenshotsBuyer: Indie hackers shipping UI with agents

The Reddit threads

▲ 1.8k
1 Reddit thread
App

Spreadsheet cleanup app for ChatGPT

Turns a messy CSV into a clean, editable table right inside the ChatGPT conversation.

ChatGPT logo1 to 2 weeks$12/mo
How to build it
  1. 1Build an MCP server with tools to load, clean and export a table.
  2. 2Render an editable grid inside the chat with the Apps SDK.
  3. 3Charge for large files and saved cleanup recipes.
Apps SDKMCP serverReact grid widgetBuyer: Ops and finance people living in spreadsheets

The Reddit threads

▲ 1.8k
2 Reddit threads
Subagent

Locked-down subagents

Subagent templates with tight tool lists, no nested spawning and a check on what they hand back.

Claude Code logo1 to 2 weeksFree, $10/mo teams
How to build it
  1. 1Ship subagent files that list only the tools each job needs and cannot start other subagents.
  2. 2Use a SubagentStop hook to flag results that tell the main session to delete or run something.
  3. 3Sell shared policies so a team's subagents follow the same limits.
.claude/agentsSubagentStop hookTool allowlistsBuyer: Teams running many subagents at once

The Reddit threads

The loudest threads

Most upvoted posts behind these ideas

Which agent each idea works with

Top 12 by upvotes. Filled dot = works with that agent

BID MCP server

Ask your agent what to build next

Connect Business Ideas Database to Claude Code, Codex or Cursor and search validated ideas, Reddit proof and keyword data without leaving the terminal.

# Claude Code
❯ claude mcp add --transport http bid \
https://businessideasdb.com/api/mcp \
--header "Authorization: Bearer $BID_KEY"
✓ Connected: search_ideas, get_idea
# then just ask
❯ find me a dev tool idea with real demand

Questions

What is vibe coding?

Vibe coding means building software by describing what you want to an AI coding agent such as Claude Code, Codex or Cursor and steering the result, instead of writing most of the code by hand. Andrej Karpathy coined the term in February 2025.

What should I build with Claude Code?

Start with a problem other developers already complain about. The most upvoted requests on this page are Agent status light, Job application skill, Plain English mode. 22 of the 53 ideas are small enough to build in a weekend.

Where do these ideas come from?

Each idea is based on public Reddit threads in communities like r/ClaudeAI, r/ClaudeCode, r/codex, r/cursor, where developers describe a problem or ask for a tool. Every card links to its threads so you can read them yourself. Upvote counts are a September 2026 snapshot and change over time.

Your next idea is already validated.

You just haven't seen it yet.