A bug-fixing workflow that requires a small failing test showing the problem before changing the code.

Use it to reproduce a bug, find its underlying cause, apply a fix only after reproduction, and pass through human approval points.

It reduces the risk of guessing at a fix and keeps a permanent test that prevents the bug from returning.

fix-bug — Skill for Codex by engindemirog

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 engindemirog/ai-native-engineering-workspace --skill fix-bug

Clone the repo

git clone --depth 1 https://github.com/engindemirog/ai-native-engineering-workspace

Made for: 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/engindemirog/ai-native-engineering-workspace/fix-bug/github.svg)](https://agentmods.dev/skills/engindemirog/ai-native-engineering-workspace/fix-bug)

Your own site

<a href="https://agentmods.dev/skills/engindemirog/ai-native-engineering-workspace/fix-bug"><img src="https://agentmods.dev/badge/skills/engindemirog/ai-native-engineering-workspace/fix-bug/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/engindemirog/ai-native-engineering-workspace/fix-bug"><img src="https://agentmods.dev/badge/skills/engindemirog/ai-native-engineering-workspace/fix-bug.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 26 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 115 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. 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.

Model	Per session	Once invoked
Fable 5.1	$0.00026	$0.00115
Opus 5.5	$0.00010	$0.00046
Sonnet 5.5	$0.00005	$0.00023
Haiku 4.5	$0.00003	$0.00012

Measured 9d ago against content hash ff638e15f9a9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

fix-bug scanned grade A with 0 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 9d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

adapters/codex/skills/fix-bug/SKILL.md · 9 lines

What it actually says

Read AGENTS.md and workflows/bug-fix.md. Run the workflow for what is described after the skill name. Iron rule: no fix before a failing minimal reproduction test exists (R-05 pattern). Diagnose root cause before changing anything (R-01). The reproduction test is permanent. Stop at every human gate, one decision per gate message (workflows/segments.md, Contract, Gate).

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

agents/openai.yaml 135 B

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.

9d ago Changed · +1 lines ff638e15f9a9
20d ago First seen · 8 lines · 26 tokens per session scan A 2d135d660fc3

Subscribe to this mod's changes

fix-bug is a skill published in the GitHub repository engindemirog/ai-native-engineering-workspace (114 stars, last pushed 4d ago), licensed MIT. It adds 26 tokens to every session and 115 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-20.

Debugging Testing Unit testing

fix-bug next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
fix-bugengindemirog/ai-native-engineering-workspace	Skill	114	4d ago	MIT	A	26	Codex
testinggarrytan/gbrain	Skill	32k	today	MIT	A	63	Claude Code
verifyYeachan-Heo/oh-my-claudecode	Skill	41k	today	MIT	A	12	Claude Code
detect-static-dependenciesdotnet/skills	Skill	5.9k	today	MIT	A	135	Claude Code
testing-blocksadobe/skills	Skill	321	today	Apache-2.0	A	61	Claude Code
dart-downstream-fixdartsim/dart	Skill	1.2k	today	BSD-2-Clause	A	25	Claude Code
experiment-iterative-coderEvoScientist/EvoSkills	Skill	488	12d ago	Apache-2.0	A	145	Claude Code