debug

debug is a skill for Claude Code, Codex from suboss87/FDEOps. It costs 37 tokens per session (252 once invoked), scanned A, original, MIT.

A guide for investigating and repairing a repeatable failure in an application or customer integration. It also covers preventing the same failure from returning.

In plain words
What is it for?
Use it to diagnose a reproducible error, repair the affected integration or application, and plan regression prevention.
Why use it?
It gives a structured way to find the cause instead of guessing, while keeping live-service changes subject to the proper incident authority.

Skill for Claude CodeCodex

Written for Claude Code and Codex: shipped in a Claude Code plugin, but also agents/openai.yaml present.

Part of the fdeops plugin — 35 skills, 5 commands, 3 hooks shipped together

Good fit Use it to diagnose a reproducible error, repair the affected integration or application, and plan regression prevention.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/suboss87/fdeops/debug
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 suboss87/FDEOps --skill debug
Clone the repo
git clone --depth 1 https://github.com/suboss87/FDEOps

Made for: Claude Code, Codex.

Or install fdeops, the plugin that ships this one along with the rest of its 35 skills, 5 commands, 3 hooks.

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 debug

README.md
[![agentmods](https://agentmods.dev/badge/skills/suboss87/fdeops/debug/github.svg)](https://agentmods.dev/skills/suboss87/fdeops/debug)
Your own site
<a href="https://agentmods.dev/skills/suboss87/fdeops/debug"><img src="https://agentmods.dev/badge/skills/suboss87/fdeops/debug/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 debug

Your own site · 80×15
<a href="https://agentmods.dev/skills/suboss87/fdeops/debug"><img src="https://agentmods.dev/badge/skills/suboss87/fdeops/debug.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 37 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 252 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 $0.00037 $0.00252
Opus 5.5 $0.00015 $0.00101
Sonnet 5.5 $0.00007 $0.00050
Haiku 4.5 $0.00004 $0.00025

Measured 12d ago against content hash f30da7cf50e3, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

debug 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 12d 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.

skills/debug/SKILL.md · 26 lines

What it actually says

debug

Purpose

A diagnosed failure, repair and regression evidence.

Before investigating or acting:

  1. Read the task context contract.
  2. Read the method.

Load further references only when the task needs them. Everything linked is included in this skill; no other skill pack is required.

Principles

  • Work directly from the supplied permitted context. Standalone work does not require an engagement folder or initialization. Record filenames in the method are optional persistence destinations when no engagement is bound.
  • If called by @fde, reuse its current sanitized packet and scope. Do not restart setup, discovery or questions already answered.
  • The task context contract controls persistence and authority in both modes. Preserve unknowns and distinguish implementation, verification, deployment and acceptance.
  • Use the customer's repository instructions and available tools. Report a missing capability or unrun check honestly; do not claim that installing a skill provisions infrastructure.
Files

What ships with it

11 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. 12d ago Changed f30da7cf50e3
  2. 1mo ago Changed · +4 lines · +6 tokens per session 00b6f8c7c56b
  3. 1mo ago First seen · 22 lines · 31 tokens per session scan A 7862670d5c02

Subscribe to this mod's changes

debug is a skill published in the GitHub repository suboss87/FDEOps (969 stars, last pushed 9d ago), licensed MIT. It adds 37 tokens to every session and 252 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 2026-09-16.

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