bug-diagnosis

bug-diagnosis is a skill for Claude Code, Codex from karthikrshet/aiskills. It costs 60 tokens per session (2,013 once invoked), scanned B, original, no licence file.

A structured debugging guide that investigates the underlying cause of a software bug before a fix is attempted. It can activate when a bug, failed test, or unexpected result is reported.

In plain words
What is it for?
Use it to investigate failed tests, reported bugs, and unexpected software behavior before changing the code.
Why use it?
It reduces guess-and-check fixes that address symptoms and may create new bugs.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Use it to investigate failed tests, reported bugs, and unexpected software behavior before changing the code.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/karthikrshet/aiskills/bug-diagnosis
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.

Any agent
npx skills add karthikrshet/aiskills --skill bug-diagnosis
Clone the repo
git clone --depth 1 https://github.com/karthikrshet/aiskills

Made for: Claude Code, Codex.

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 bug-diagnosis

README.md
[![agentmods](https://agentmods.dev/badge/skills/karthikrshet/aiskills/bug-diagnosis/github.svg)](https://agentmods.dev/skills/karthikrshet/aiskills/bug-diagnosis)
Your own site
<a href="https://agentmods.dev/skills/karthikrshet/aiskills/bug-diagnosis"><img src="https://agentmods.dev/badge/skills/karthikrshet/aiskills/bug-diagnosis/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 bug-diagnosis

Your own site · 80×15
<a href="https://agentmods.dev/skills/karthikrshet/aiskills/bug-diagnosis"><img src="https://agentmods.dev/badge/skills/karthikrshet/aiskills/bug-diagnosis.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 60 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,013 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 2 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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 $0.00060 $0.02013
Opus 5 $0.00030 $0.01007
Sonnet 5 $0.00012 $0.00403
Haiku 4.5 $0.00006 $0.00201

Measured 10d ago against content hash d880f933afa7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade B, and why

bug-diagnosis scanned grade B with 2 findings 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 10d 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.

Sends data to an external URLmediumData exfiltration

A POST to an outside endpoint may be telemetry or may be exfiltration; either way the mod talks to somewhere, and you should know where.

**Step 1 — Reproduce:** `curl -X POST /api/search -d '{"query": "python"}' → []`

Makes network callslowCapability

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

**Step 1 — Reproduce:** `curl -X POST /api/search -d '{"query": "python"}' → []`
skills/debugging/bug-diagnosis/SKILL.md · 218 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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. 10d ago First seen · 218 lines · 60 tokens per session scan B d880f933afa7

Subscribe to this mod's changes

bug-diagnosis is a skill published in the GitHub repository karthikrshet/aiskills (4 stars, last pushed 20d ago), with no licence file. It adds 60 tokens to every session and 2,013 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it B with 2 findings (sends data to an external url, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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