intermittent-issue-debugging

intermittent-issue-debugging is a skill for Claude Code, Codex from aj-geddes/useful-ai-prompts. It costs 34 tokens per session (524 once invoked), scanned A, original, MIT.

A systematic method for investigating bugs that appear only sometimes. It uses detailed logs, monitoring, and investigation of timing, race conditions, and resource limits.

In plain words
What is it for?
Use it for occasional errors, flaky tests, suspected race conditions, timing-dependent bugs, and failures caused by exhausted resources.
Why use it?
Sporadic failures are difficult to reproduce, so ordinary step-by-step debugging may miss them. Capturing the right context helps reveal what happened when the problem occurred.

Skill for Claude CodeCodex

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

Good fit Use it for occasional errors, flaky tests, suspected race conditions, timing-dependent bugs, and failures caused by exhausted resources.

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Install with agentmods
npx agentmods add skills/aj-geddes/useful-ai-prompts/intermittent-issue-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.

Any agent
npx skills add aj-geddes/useful-ai-prompts --skill intermittent-issue-debugging
Clone the repo
git clone --depth 1 https://github.com/aj-geddes/useful-ai-prompts

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 intermittent-issue-debugging

README.md
[![agentmods](https://agentmods.dev/badge/skills/aj-geddes/useful-ai-prompts/intermittent-issue-debugging/github.svg)](https://agentmods.dev/skills/aj-geddes/useful-ai-prompts/intermittent-issue-debugging)
Your own site
<a href="https://agentmods.dev/skills/aj-geddes/useful-ai-prompts/intermittent-issue-debugging"><img src="https://agentmods.dev/badge/skills/aj-geddes/useful-ai-prompts/intermittent-issue-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 intermittent-issue-debugging

Your own site · 80×15
<a href="https://agentmods.dev/skills/aj-geddes/useful-ai-prompts/intermittent-issue-debugging"><img src="https://agentmods.dev/badge/skills/aj-geddes/useful-ai-prompts/intermittent-issue-debugging.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 34 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 524 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. Third-party audits
  • Socket pass 18 Mar 2026
  • Snyk pass 4 Mar 2026
How audits are shown
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 $0.00034 $0.00524
Opus 5 $0.00017 $0.00262
Sonnet 5 $0.00007 $0.00105
Haiku 4.5 $0.00003 $0.00052

Measured 9d ago against content hash be5f5397023f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

intermittent-issue-debugging 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.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/scaffold-tests.sh, templates/test-template.js), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/intermittent-issue-debugging/SKILL.md · 89 lines

How it starts

The opening of the file, as written. The whole thing — 89 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Intermittent Issue Debugging

Table of Contents

Overview

Intermittent issues are the most difficult to debug because they don't occur consistently. Systematic approach and comprehensive monitoring are essential.

When to Use

  • Sporadic errors in logs
  • Users report occasional issues
  • Flaky tests
  • Race conditions suspected
  • Timing-dependent bugs
  • Resource exhaustion issues

Quick Start

Minimal working example:

// Strategy 1: Comprehensive Logging
// Add detailed logging around suspected code

function processPayment(orderId) {
  const startTime = Date.now();
  console.log(`[${startTime}] Payment start: order=${orderId}`);

  try {
    const result = chargeCard(orderId);
    console.log(`[${Date.now()}] Payment success: ${orderId}`);
    return result;
  } catch (error) {
    const duration = Date.now() - startTime;
    console.error(`[${Date.now()}] Payment FAILED:`, {
      order: orderId,
      error: error.message,
      duration_ms: duration,
      error_type: error.constructor.name,
      stack: error.stack,
    });
    throw error;
  }
}

// Strategy 2: Correlation IDs
// ... (see reference guides for full implementation)

Reference Guides

Detailed implementations in the references/ directory:

Guide Contents
Capturing Intermittent Issues Capturing Intermittent Issues
Common Intermittent Issues Common Intermittent Issues
Systematic Investigation Process Systematic Investigation Process
Monitoring & Prevention Monitoring & Prevention

Best Practices

✅ DO

  • Follow established patterns and conventions
  • Write clean, maintainable code
  • Add appropriate documentation
  • Test thoroughly before deploying

Read the full file on GitHub · 89 lines

Files

What ships with it

6 files 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.

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. 9d ago First seen · 89 lines · 34 tokens per session scan A be5f5397023f

Subscribe to this mod's changes

intermittent-issue-debugging is a skill published in the GitHub repository aj-geddes/useful-ai-prompts (338 stars, last pushed 6mo ago), licensed MIT. It adds 34 tokens to every session and 524 once invoked, about $0.0002 per session on Opus 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 2026-09-03.

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