Debug a camera game through an MCP server inside the running app
by PaperChaseWebb
A webcam watches your monitor while you practice with a laser training pistol, and the game scores each hit. Claude Code wrote all of it over about two weeks, and the trick that made it work was giving the agent live access to the running app.
- Price
- Free
- Difficulty
- Advanced
- Setup
- 1 hr
- Format
- .md file
debug-a-camera-game-through-an-mcp-server-inside-the-running-app.md · 2 KB · direct download, no signup
What you end up with
The key design choice was that the MCP tools return raw measurements, not verdicts like 'hit detected', so the agent reasons from evidence instead of trusting a summary.
What you get
- A plain-language summary of the workflow
- A fill-in prompt template
- What to watch out for
- A link to the original source
Who it is for
Builders who already use AI agents and want a proven workflow they can copy into their own project.
Works with
Solid chips: the agent is named in this listing's own tools list. Dashed chip: Plain Markdown, so it also pastes into other agents such as Grok Bot, Hermes, OpenClaw or Muse. We list those as compatible by format only, not as tested.
Tools needed
Cost to run: Free with the agent plan you already use.
Time to result: One working session
How it works
Read what they did
Skim the source post linked below, then the summary on this page.
Expected: You know the setup and the one rule that made it work.
Fill in the template
Copy the prompt and replace every [bracketed] value with your own project details.
Expected: A prompt that fits your project.
Run it once and check
Run it on a small task first and confirm the result yourself before you trust it on real work.
Expected: One verified run.
Sample prompt from the pack
Add a small MCP server inside your running app, not a separate process Expose read tools for raw inputs (a camera frame, sensor values) and intermediate math, including rejected candidates Add one write tool for simulated input, such as key presses Ask the agent to reproduce the bug, then reason from the numbers it pulled before changing code
Adapted by PaperChaseWebb. Not the original author's prompt.
Free preview of the file
# Debug a camera game through an MCP server inside the running app PaperChase agent use case (free feed entry), version 1.0. Source: [u/vkorost on r/ClaudeAI](https://www.reddit.com/r/ClaudeAI/comments/1xeqtp1/i_built_a_laser_dryfire_shooting_game_with_claude/), 2026-10-25. ## What they did The builder made a desktop game where a webcam pointed at the monitor detects laser hits, using on-screen markers so the camera can sit off to the side. It has 9 drills, 15 target figures and a two-player mode. To fix detection bugs, they put an MCP server inside the app so Claude could pull a camera frame, read the detector's numbers including the spots it rejected, check coordinates and send key presses. ## Worth knowing The key design choice was that the MCP tools return raw measurements, not verdicts like 'hit detected', so the agent reasons from evidence instead of trusting a summary. The author says that cut a typical diagnosis from hours to about 90 seconds. The same pattern applies to any app with sensors or a camera in the loop.
Worth knowing
- The key design choice was that the MCP tools return raw measurements, not verdicts like 'hit detected', so the agent reasons from evidence instead of trusting a summary. The author says that cut a typical diagnosis from hours to about 90 seconds. The same pattern applies to any app with sensors or a camera in the loop.
- Figures are as reported by the original author and were not re-measured by us.
Questions
Where does this come from?
A public post credited to u/vkorost on r/ClaudeAI. Source: https://www.reddit.com/r/ClaudeAI/comments/1xeqtp1/i_built_a_laser_dryfire_shooting_game_with_claude/
Is it free?
Yes. Feed entries are free to read and download.
Details
Version 1.0 · Updated Oct 26, 2026 · Markdown version of this page
License: Personal and commercial use. Credit the original source when you share the workflow. Download terms
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