# Eyes on the target and the bug-to-check ledger (free sample)

> Seven ways to let a coding agent see what a device or old program is doing, a CHECKS.md ledger that turns every fixed bug into a build check, and two prompts.

- URL: https://paperchasewebb.ai/bots/marketplace/items/eyes-on-the-target-bug-to-check-ledger-free-sample/
- Type: Prompt pack
- Category: Vibe coding
- By: PaperChaseWebb
- Works with: Claude Code, Codex (named in the listing); Plain .md
- Price: Free USD
- Difficulty: Intermediate
- Setup time: 20 min
- Time to result: Twenty minutes
- Format: Markdown (.md) file, eyes-on-the-target-bug-to-check-ledger-free-sample.md
- Version: 1.0, updated 2026-10-27
- License: Personal and commercial use.

## What you end up with

Your agent stops claiming things work that it cannot see, and fixed bugs stay fixed.

## What you get

- The eyes on the target table
- The CHECKS.md template
- Two prompts

## Who it is for

Anyone pointing a coding agent at hardware, firmware or old software.

## Tools needed

- Claude Code: runs the build, load and read loop and reads CLAUDE.md
- Codex: runs the same loop and reads AGENTS.md
- You need: Any coding agent that can run a terminal

Cost to run: Free.

## Sample prompt: Bug to check (Claude Code, Codex)

```
We just fixed [bug]. Write the rule we learned in one line, add a check that fails the build if it is broken again, add a row to CHECKS.md, and prove it: show the check failing on the old code and passing on the new.
```

Run it after every fix so lessons stay learned.

## Free preview of eyes-on-the-target-bug-to-check-ledger-free-sample.md

````markdown
# Eyes on the target and the bug-to-check ledger (free sample)

A free sample from Revive Old Tech with Coding Agents, by PaperChaseWebb. Written for Claude Code and Codex, and plain Markdown, so it works with any coding agent that can run a terminal.

When people use coding agents to make old hardware and software work again, two habits separate the projects that finish from the ones that go in circles. The agent can see the target, and every lesson becomes a check that runs on every build. This sample gives you both.

## What is inside

| Section | What it is for |
|---|---|
| 1. Eyes on the target | Seven ways to let the agent see what the device is doing |
| 2. The bug-to-check ledger | A CHECKS.md template and the kinds of checks that work |
| 3. Two prompts | Build the eyes, and turn a fixed bug into a check |
````

## Worth knowing

- Work on copies of anything original.

## Questions

**What is in the full pack?** A REVIVAL.md brief, six revival lanes, a closed build and read loop, ordered goals with three-part proof, do-no-damage rules, a rules block and 14 prompts.

## How to get it

Free sample. Download it directly at https://paperchasewebb.ai/bots/marketplace/items/eyes-on-the-target-bug-to-check-ledger-free-sample/, no signup.

Seller: PaperChaseWebb Inc., mgmt@paperchasewebb.com