systematic-debugging

systematic-debugging is a skill for Claude Code, Codex from Eilodon/DPS-Superskills-MCP. It costs 34 tokens per session (1,899 once invoked), scanned A, original, Apache-2.0.

A step-by-step method for investigating software bugs, failed tests, and unexpected behaviour before suggesting a fix. It requires collecting direct evidence about the cause.

In plain words
What is it for?
It is for diagnosing errors, tracing failures across system boundaries, collecting evidence, and confirming the actual root cause.
Why use it?
It reduces guesswork by requiring the problem to be understood and reproduced before changes are proposed.

Skill for Claude CodeCodex

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

Good fit It is for diagnosing errors, tracing failures across system boundaries, collecting evidence, and confirming the actual root cause.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/eilodon/dps-superskills-mcp/systematic-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 Eilodon/DPS-Superskills-MCP --skill systematic-debugging
Clone the repo
git clone --depth 1 https://github.com/Eilodon/DPS-Superskills-MCP

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 systematic-debugging

README.md
[![agentmods](https://agentmods.dev/badge/skills/eilodon/dps-superskills-mcp/systematic-debugging/github.svg)](https://agentmods.dev/skills/eilodon/dps-superskills-mcp/systematic-debugging)
Your own site
<a href="https://agentmods.dev/skills/eilodon/dps-superskills-mcp/systematic-debugging"><img src="https://agentmods.dev/badge/skills/eilodon/dps-superskills-mcp/systematic-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 systematic-debugging

Your own site · 80×15
<a href="https://agentmods.dev/skills/eilodon/dps-superskills-mcp/systematic-debugging"><img src="https://agentmods.dev/badge/skills/eilodon/dps-superskills-mcp/systematic-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 1,899 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 $0.00034 $0.01899
Opus 5.5 $0.00014 $0.00760
Sonnet 5.5 $0.00007 $0.00380
Haiku 4.5 $0.00003 $0.00190

Measured 2mo ago against content hash 0a3b30068b46, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

systematic-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 2mo 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.

docs/DPS-superskills-v5.2.1/systematic-debugging/SKILL.md · 193 lines

How it starts

The opening of the file, as written. The whole thing — 193 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Systematic Debugging

Register: TECHNIQUE Goal: Identify root cause with evidence before attempting any fix. Constraints: No fix attempts before Phase 1 complete. Evidence Anchor at each phase. Confirmed fix → pattern-globalize immediately. Adapt: the four phases below are a proven approach — adapt how you execute them to context, complexity, and available tools.

# Recent changes for context (auto-injected):
!git log --oneline -7 2>/dev/null || echo "No git history available"

Core Constraints

1. Root cause investigation completes before first fix attempt
2. Every phase produces an Evidence Anchor (not a claim — an observation)
3. Confirmed fix triggers pattern-globalize — always

Four Phases

Phase 1 — Understand the Failure

Goal: Know exactly what is broken and why — not guessing. Constraints:

  • Document Evidence Anchor before forming any hypothesis: exact error text, file:line, reproduction steps
  • If not reproducible → gather more data. Do not guess.
  • Multi-component system → instrument each boundary before hypothesizing
# Evidence Anchor format:
Error:        "<exact message>"
Location:     <file>:<line>
Reproducible: YES | NO | INTERMITTENT
Recent change: <git sha> — <description> (from !git log above)

Instrument at boundaries when system has multiple components:

echo "=== Component A output: ===" && <check>
echo "=== Component B input:  ===" && <check>
# Find WHERE it breaks, then investigate that component

Phase 2 — Find the Pattern

Goal: Understand the structural cause, not just the specific instance. Constraints:

  • Find a working example of similar code in the codebase before proposing a fix
  • Read reference implementations completely — no skimming
  • List every difference between working and broken, however small
Evidence Anchor: "Working: <file>:<line> | Broken: <file>:<line> | Difference: <what differs>"

Phase 3 — Hypothesis and Test

Read the full file on GitHub · 193 lines

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.

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. 2mo ago First seen · 193 lines · 34 tokens per session scan A 0a3b30068b46

Subscribe to this mod's changes

systematic-debugging is a skill published in the GitHub repository Eilodon/DPS-Superskills-MCP (0 stars, last pushed 4mo ago), licensed Apache-2.0. It adds 34 tokens to every session and 1,899 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 2026-08-31.

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