AI agents for coding

Coding agents that ship features, open pull requests and run tiny servers. Each entry has a copy-paste prompt, difficulty, setup time and known pitfalls.

Use cases

CodingX · 2026-10

Hermes Agent Nearly Doubled Speech-to-Text Accuracy on Hard Words: 99 to 183 of 240

A user turned his 15K saved Wispr Flow dictations into a test set for the local Whisper model behind his Hermes Agent. The agent turned his Wispr dictionary into a hint list, diffed raw vs corrected text to find words Whisper keeps mishearing, made find-and-fix rules, and tested every rule against the full history. With no fine-tuning, dictionary words went from 99/240 to 183/240 on Wispr clips and 19/45 to 43/45 on sentences he read aloud. It now archives the data nightly and looks for new fixes weekly.

  • Level Advanced
  • Setup1–3 hrs*
  • Evidence Strong evidence
Hermes AgentSource-linked
CodingReddit

Non-engineer built a B2B SaaS with Codex: 2 paying clients

A non-engineer built a 'boring' vertical B2B SaaS with an orchestrator chat plus worker chats. Two paying clients and 6 leads, about $800 in credits spent.

  • Level Intermediate
  • Setup1–3 hrs*
  • Evidence Some evidence
CodexSource-linkedNeeds verification
CodingReddit

Claude Code app at $4K MRR via long-tail SEO pages

Shipped in about a month on agent-friendly tooling (Next.js, Convex, Clerk, Stripe, Vercel). It was free for 3 months, and growth came entirely from long-tail SEO landing pages.

  • Level Intermediate
  • Setup1–3 hrs*
  • Evidence Some evidence
Claude CodeSource-linkedNeeds verification
CodingX · 2026-10

Clear the pull request queue before your first coffee

Asked to merge the pull requests waiting on him, the agent merged seven, found one with conflicts, had a second agent rebase it, then merged that one too.

  • Level Intermediate
  • Setup1–3 hrs*
  • Evidence Some evidence
Unnamed agentSource-linked
CodingWeb

Let Claude Code write and test a Linux kernel speedup

Linus Torvalds posted a page-cache patch series and credited Claude Code with the code, the test programs and the review. Small-read throughput on his laptop went from about 10 million to 33 million reads per second.

  • Level Intermediate
  • Setup1–3 hrs*
  • Evidence Some evidence
Claude CodeSource-linked
CodingWeb

Build and animate 3D game models in Blockbench by chat

An MCP server plus Blockbench plugin lets Claude build models, unwrap UVs, paint textures, add bones and animations, check its work with screenshots and export. Every step lands in Blockbench's undo history.

  • Level Intermediate
  • Setup1–3 hrs*
  • Evidence Some evidence
Claude CodeSource-linked
CodingWeb

Run one coding agent per repo and let them message each other

A developer runs a Claude Code session per repository; instead of editing each other's code they send messages. Over three and a half weeks, 81 sessions across 13 projects sent 624 messages, with up to nine active in one hour.

  • Level Intermediate
  • Setup1–3 hrs*
  • Evidence Some evidence
Claude CodeSource-linked
CodingWeb

Record a browser task once and get an n8n workflow

An open-source Chrome extension records you doing a task once, a vision model turns it into a plan with variables and a trigger, and a builder outputs n8n nodes. Steps without an API become marked manual steps.

  • Level Intermediate
  • Setup1–3 hrs*
  • Evidence Some evidence
n8nClaudeSource-linked
CodingWeb

Run coding agents like a teaching hospital

Cockroach Labs ran a coding-agent pipeline with hospital roles (triage nurse, fellow, review attending, discharge nurse) and mandatory planning and review before merge. Over 5 months it processed over a million lines of code with only 7 reverts.

  • Level Intermediate
  • Setup1–3 hrs*
  • Evidence Some evidence
Claude CodeSource-linked
CodingWeb

Decompile an old game to readable C++ with a fleet of agents

Over 3 months and 500+ billion tokens, a developer and community members had AI agents decompile a popular first-person shooter into readable C++ that compiles, and wrote up how they set up the harness and orchestration.

  • Level Intermediate
  • Setup1–3 hrs*
  • Evidence Some evidence
Unnamed agentSource-linked
CodingX · 2026-10

Ship a playable Halloween-themed chess game with an AI coach

Asked for an update to a chess game, Grok Bot built “Halloween Chess” with witches, ghosts, skeleton horses, a giant pumpkin boss, thunder effects, and an AI coach—reported as fully playable, with a demo video.

  • Level Intermediate
  • Setup1–3 hrs*
  • Evidence Some evidence
Grok BotSource-linked
CodingX · 2026-10

Find a lost file or old session on your computer

Claude couldn't find a half-finished session from August; Grok Bot found it in 12 seconds and put it in a folder so Claude could finish the work.

  • Level Beginner
  • Setup~30 min*
  • Evidence Some evidence
Grok BotSource-linkedBeginner-friendly
CodingX · 2026-10

Have Grok Bot watch a long task another agent is running

A user had Grok Bot monitor an intensive Claude Cowork task. It worked, but the coordinator used 7% of their Ultra usage in under 2 hours vs 2% for the agent doing the work.

  • Level Intermediate
  • Setup1–3 hrs*
  • Evidence Some evidence
Grok BotSource-linked
CodingWeb · 2026-02

Build a niche SaaS as a non-developer business owner

A café and coffee-roaster owner in Australia with little coding background used Replit Agent to build AssetShark, an asset-tracking and depreciation app that uses the Australian Taxation Office's rates. It has a React front end, a Node back end with login, a content system, an admin dashboard and a free calculator that brings in leads.

  • Level Advanced
  • Setup1–3 hrs*
  • Evidence Some evidence
Replit AgentSource-linked
CodingX · 2026-09

Fix a frozen coding agent on your home PC from your phone

Codex stopped responding on a user's home PC while he was out. From his phone, he asked his Grok Bot what was wrong. It checked the PC remotely and found Codex still running, with 539 threads, hundreds of leftover node processes and his 32GB of RAM nearly full.

  • Level Intermediate
  • Setup1–3 hrs*
  • Evidence Some evidence
Grok BotSource-linked
CodingWeb

Let Claude Code drive desktop apps like GIMP and Blender

CLI-Anything wraps desktop software in a command line coding agents can operate (GIMP, Blender, LibreOffice, Calibre, and community tools). Install via CLI-Hub, or generate a CLI for an app that doesn't have one yet — works with Claude Code, Cursor, Codex and similar.

  • Level Intermediate
  • Setup1–3 hrs*
  • Evidence Some evidence
Claude CodeSource-linked
CodingX · 2026-10

Explain a school lesson to your kids with a game the agent builds

After his kids asked why a straw looks bent in water, a parent asked Grok Bot to explain light refraction. It built a playable 3D game in a single HTML file: an archerfish shoots insects off leaves, first misses by aiming where the fly appears, then corrects for the bend in the light (n = 1.33) and hits.

  • Level Beginner
  • Setup~30 min*
  • Evidence Some evidence
Grok BotSource-linkedBeginner-friendly
CodingX · 2026-10

Build a multiplayer Snake game people play right from a post

Inspired by a developer who fit Minecraft inside a tweet, a user gave Grok Bot the link and asked for Snake that works the same way. The result runs on one Node server with a shared 72 by 72 world, where everyone who opens the post plays in the same arena, dead snakes turn into food, and bots fill the empty slots when fewer than 4 people are online.

  • Level Intermediate
  • Setup1–3 hrs*
  • Evidence Some evidence
Grok BotSource-linked
CodingWeb

Turn a single-player game into co-op with your friends

Co-op Anything is an open-source playbook and MCP server: point your coding agent at a game and it researches existing mods, reverse engineers what it must, tests with in-game bots and packages a one-click install.

  • Level Advanced
  • Setup1–3 hrs*
  • Evidence Some evidence
Claude CodeCursorCodexSource-linked
CodingX · 2026-10

Grok Bot Built and Hosted a Playable Arcade Game During a Haircut

On day 7 of a 30-day test of Grok Bot for daily life, a user asked it to build a YouTube arcade game while he sat in the barber's chair. It studied live YouTube Playables games, picked a concept, wrote the game on its own computer, playtested it with a bot, hosted it and made the store covers. He walked out with a fresh cut and a playable one-tap game, Ring Drop.

  • Level Intermediate
  • Setup1–3 hrs*
  • Evidence Some evidence
Grok BotSource-linked
CodingReddit · 2026-10

Claude Code Built a 61 KB WebGPU Ocean Sim in About 30 Minutes From 1 Prompt

A Reddit user gave Claude Code one prompt: make the most realistic water scene it could in WebGPU, with a floating camera. It wrote the renderer from scratch with no engine or libraries (FFT waves, whitecaps, a physically based sky and sun glitter) in a single 61 KB HTML file. It screenshotted its own output and had separate subagents critique the screenshots so it wasn't judging its own work. The whole thing took about 30 minutes.

  • Level Advanced
  • Setup1–3 hrs*
  • Evidence Some evidence
Claude CodeSource-linked
CodingX · 2026-02

Turn a Telegram message into a pull request

Send a task over Telegram, the agent writes the code and opens a PR, and a nightly job has the agent review its own logs and improve.

  • Level Intermediate
  • Setup1–3 hrs*
  • Evidence Anecdotal
OpenClawClaude CodeSource-linked
CodingReddit

Personal trainer shipped a Cursor app: 80 paying users

A former trainer prototyped in Lovable and finished in Cursor. AI workout plans for coaches reached $2,320 MRR, but Claude API costs are $850 a month.

  • Level Intermediate
  • Setup1–3 hrs*
  • Evidence Anecdotal
CursorClaudeSource-linked
CodingReddit

Solo Cursor launch: 385 signups, 6 paid in week one

A solo founder used Cursor with Next.js, Supabase and Vercel. Reddit posts brought about 200K views, 4K visits, 385 signups and roughly $80 MRR.

  • Level Intermediate
  • Setup1–3 hrs*
  • Evidence Anecdotal
CursorSource-linkedNeeds verification
CodingReddit

Cursor + Codex production app: verify every external API call

A solo dev shipped a full-stack app with 3 LLM integrations. Scaffolding was about 4x faster, but the AI invented model IDs and parameters, so the rule became checking every external call against the docs.

  • Level Intermediate
  • Setup1–3 hrs*
  • Evidence Anecdotal
CursorCodexSource-linkedNeeds verification
CodingWeb

Self-healing home server agent (15 crons, 24 scripts)

An always-on agent with SSH, kubectl and 1Password checks health, analyzes logs, fixes pods and configs, deploys through infrastructure-as-code, and runs a nightly brainstorm.

  • Level Intermediate
  • Setup1–3 hrs*
  • Evidence Anecdotal
OpenClawSource-linked
CodingX · 2025-08

Comet ran a site's manual QA test cases

Gave Perplexity Comet step-by-step manual test cases for a live site. It ran each one and reported results.

  • Level Beginner
  • Setup~30 min*
  • Evidence Anecdotal
Perplexity CometSource-linkedBeginner-friendly
CodingWeb

Share context between Claude Code and Codex in one repo

A developer running Claude Code and Codex on the same codebase stopped them clobbering each other with one shared instruction file, a git worktree per agent, and a handoff file instead of re-explaining context.

  • Level Beginner
  • Setup~30 min*
  • Evidence Anecdotal
Claude CodeCodexSource-linkedBeginner-friendly
CodingWeb

Get warned 30 days before an SSL certificate expires

Every Monday at 7:00 a workflow checks a list of client domains and emails a warning for any certificate expiring within 30 days, so you don't hear about it from a customer.

  • Level Beginner
  • Setup~30 min*
  • Evidence Anecdotal
n8nSource-linkedBeginner-friendlyNeeds verification
CodingWeb

Let your agent point at things on your screen with big arrows

A macOS command-line tool plus a Claude Code/Codex skill lets the agent draw an arrow and a sign on top of any window to show you where to click. Clicks pass through and the arrow removes itself.

  • Level Beginner
  • Setup~30 min*
  • Evidence Anecdotal
Claude CodeCodexSource-linkedBeginner-friendly
CodingWeb

Coordinate long coding jobs with a chief-of-staff agent

One Claude Code session writes briefs, checks claims and reads diffs while separate sessions do the work, with an external task board holding state so nothing is lost when context compacts. Every agent report is re-run before it's believed.

  • Level Intermediate
  • Setup1–3 hrs*
  • Evidence Anecdotal
Claude CodeSource-linked
CodingX · 2026-10

Watch Cursor spend every evening and log the meter

Rusty Moore shared the exact Grok Bot routine a friend uses: every day at 6pm it opens the Cursor spending dashboard read-only, reports weekly usage %, reset timing, whether on-demand spending is still off, and an activity estimate — then screenshots and appends a log row.

  • Level Beginner
  • Setup~30 min*
  • Evidence Anecdotal
Grok BotSource-linkedBeginner-friendly
CodingX · 2026-08

Connect a custom MCP server by URL

A user frustrated by slow website access found Grok Bot will connect to their own custom MCP servers just by being given the URL, beyond the official connectors.

  • Level Intermediate
  • Setup1–3 hrs*
  • Evidence Anecdotal
Grok BotSource-linked
CodingWeb

Split a huge legacy codebase into modules with an agent

Nubank used Devin to break up an eight-year-old ETL monolith with millions of lines of code. The work was split into many small sub-tasks, and Devin was fine-tuned on earlier migrations that engineers had done by hand.

  • Level Advanced
  • Setup1–3 hrs*
  • Evidence Anecdotal
DevinSource-linkedNeeds verification
CodingWeb

Assign a GitHub issue to Copilot and review its pull request

GitHub's blog shows assigning an issue directly to Copilot's coding agent. It works in a GitHub Actions environment, commits changes, runs your tests and linters, and opens a pull request for review.

  • Level Intermediate
  • Setup1–3 hrs*
  • Evidence Anecdotal
GitHub CopilotSource-linkedNeeds verification
CodingX · 2026-10

Run a Monday retro on your coding-agent sessions

A full-time agent user has a Monday agent read the past week of Claude Code and Codex sessions (laptop + home server): repeated errors, blocked commands, corrections, expensive overnight failures — it proposes one concrete fix per pattern and waits for yes/no before changing anything.

  • Level Advanced
  • Setup1–3 hrs*
  • Evidence Anecdotal
Claude CodeSource-linked
CodingX · 2026-10

Build a Halloween potion-brewing game with a kids mode

A parent had Grok Bot build a witch's potion lab game: brew potions from a recipe in a bubbling 3D cauldron with seven ingredients, discover secret potions, pick Easy, Medium or Hard (Hard scores 1.5x) and turn on a kids mode with hints. Mix it wrong and it explodes.

  • Level Beginner
  • Setup~30 min*
  • Evidence Anecdotal
Grok BotSource-linkedBeginner-friendly
CodingX · 2026-10

1 Webhook Lets ChatGPT Dots Send Messages to Grok Bot

To let ChatGPT Dots communicate with Grok Bot, a user asked Grok Bot to set up a webhook, passed the link to his Dot, and that was it.

  • Level Intermediate
  • Setup1–3 hrs*
  • Evidence Anecdotal
Grok BotChatGPT DotsSource-linkedNeeds verification

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