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bug-repro-test

bug-repro-test is a skill for Claude Code, Codex from ahwurm/localharness. It costs 41 tokens per session (167 once invoked), scanned A, original, MIT.

A testing workflow that writes a failing test for a reported software bug before the bug is fixed. The test records the input, expected result, and incorrect result.

In plain words
What is it for?
Use it to reproduce a bug, add a regression test, and confirm the test fails for the reported reason.
Why use it?
It creates a repeatable proof of the problem and helps prevent the same bug from returning after a later fix.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

not rated 59repo +2 2d ago A scan 41 tokens original MIT

Good fit Use it to reproduce a bug, add a regression test, and confirm the test fails for the reported reason.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ahwurm/localharness/bug-repro-test
View source ↗ ahwurm/localharness localharness.dev
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 ahwurm/localharness --skill bug-repro-test
Clone the repo
git clone --depth 1 https://github.com/ahwurm/localharness

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-repro-test

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/ahwurm/localharness/bug-repro-test"><img src="https://agentmods.dev/badge/skills/ahwurm/localharness/bug-repro-test.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 41 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 167 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00041 $0.00167
Opus 5.5 $0.00016 $0.00067
Sonnet 5.5 $0.00008 $0.00033
Haiku 4.5 $0.00004 $0.00017

Measured 7d ago against content hash 9e074e22d504, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

bug-repro-test 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 7d 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.

src/localharness/assets/affordance/skills/bug-repro-test/SKILL.md · 14 lines

What it actually says

Bug reproduction test

  1. Restate the bug in one sentence: the input, the expected result and the actual result.
  2. Find the nearest existing test file for the code involved with a read-only search.
  3. Write the smallest test that sets up that input and asserts the expected result.
  4. Run only that test and confirm it fails for the reason the report gives.
  5. If it fails for another reason, fix the test, not the code.
  6. Name the test after the behaviour that is wrong.
  7. Stop there and leave the fix for a later step.
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. 7d ago First seen · 14 lines · 41 tokens per session scan A 9e074e22d504

Subscribe to this mod's changes

bug-repro-test is a skill published in the GitHub repository ahwurm/localharness (59 stars, last pushed 2d ago), licensed MIT. It adds 41 tokens to every session and 167 once invoked, about $0.0002 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 2026-10-30.

Cost OptimizationTestingagentagent-frameworkai-agentsclaudellama-cpp
Related

bug-repro-test compared with skills from other repositories

bug-repro-test next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
bug-repro-testahwurm/localharnessSkill592d agoMITA41Claude Code, Codex
hive.browser-automationaden-hive/hiveSkill11k4d agoApache-2.0A142Claude Code, Codex
hive.slack-notifications-setupaden-hive/hiveSkill11k4d agoApache-2.0A136Claude Code, Codex
hive.pdfaden-hive/hiveSkill11k4d agoApache-2.0A98Claude Code, Codex
hive.chart-creation-foundationsaden-hive/hiveSkill11k4d agoApache-2.0A133Claude Code, Codex
browser-edge-casesaden-hive/hiveSkill11k4d agoApache-2.0A40Claude Code
triage-issueaden-hive/hiveSkill11k4d agoApache-2.0A0Claude Code