debugging

debugging is a cursor rule for Cursor from BetterTyped/hype-stack. It costs 36 tokens per session (313 once invoked), scanned A, original, MIT.

A set of bug-fixing rules that requires a failing feedback check before forming theories and a regression test with every fix. A regression test checks that a previously fixed problem does not return.

In plain words
What is it for?
Use it when diagnosing or fixing bugs, failed checks, and regressions.
Why use it?
It makes failures easier to reproduce and helps prevent the same bug from coming back.

Cursor rule for Cursor

Written for Cursor: installed under .cursor/.

Good fit Use it when diagnosing or fixing bugs, failed checks, and regressions.

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/bettertyped/hype-stack/debugging
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/BetterTyped/hype-stack

Made for: Cursor.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for debugging

README.md
[![agentmods](https://agentmods.dev/badge/rules/bettertyped/hype-stack/debugging/github.svg)](https://agentmods.dev/rules/bettertyped/hype-stack/debugging)
Your own site
<a href="https://agentmods.dev/rules/bettertyped/hype-stack/debugging"><img src="https://agentmods.dev/badge/rules/bettertyped/hype-stack/debugging/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for debugging

Your own site · 80×15
<a href="https://agentmods.dev/rules/bettertyped/hype-stack/debugging"><img src="https://agentmods.dev/badge/rules/bettertyped/hype-stack/debugging.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 36 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 313 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00036 $0.00313
Opus 5.5 $0.00014 $0.00125
Sonnet 5.5 $0.00007 $0.00063
Haiku 4.5 $0.00004 $0.00031

Measured 1mo ago against content hash 7b587d3b8d42, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

debugging scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- If a test can't reach it, a script or curl invocation with a known-bad output counts — but name the command and run it red at least once before touching the fix.
.cursor/rules/debugging.mdc · 26 lines

What it actually says

Debugging Discipline

Feedback loop first

Before hypothesizing about a bug's cause, build a repro that goes red on this bug — usually a failing test at the nearest seam:

  • Backend: a failing integration test against the real Docker services.
  • Frontend: a failing component test driven by setMock responses.
  • If a test can't reach it, a script or curl invocation with a known-bad output counts — but name the command and run it red at least once before touching the fix.

A fix without a red loop is a guess. If you genuinely cannot build a repro, say so explicitly, list what you tried, and ask the user for what's missing (logs, payloads, environment access) instead of proceeding on hypothesis alone.

Fix against the loop

  • Form one hypothesis at a time and test it against the loop — don't shotgun changes across files hoping one lands.
  • The fix is done when the red loop goes green and the surrounding suite still passes.

Every bug fix ships with a regression test

The repro test from step one stays in the codebase as the regression test. If a bug escaped, the test suite had a hole — the fix isn't complete until the hole is closed. Follow the standard testing rules for where it lives and how it's written.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago First seen · 26 lines · 36 tokens per session scan A 7b587d3b8d42

Subscribe to this mod's changes

debugging is a cursor rule published in the GitHub repository BetterTyped/hype-stack (12 stars, last pushed 15d ago), licensed MIT. It adds 36 tokens to every session and 313 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.