systematic-debugging

systematic-debugging is a skill for Claude Code from DollarDill/beads-superpowers. It costs 21 tokens per session (3,015 once invoked), scanned A, original, MIT.

A step-by-step method for investigating bugs, failed tests, build failures, and other unexpected technical behavior.

In plain words
What is it for?
Use it to examine error messages, reproduce problems, trace their causes, and then choose a fix for software issues.
Why use it?
It prevents guesswork by requiring the underlying cause to be identified before anyone proposes a fix.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: mentions subagents.

Part of the beads-superpowers plugin — 22 skills, 1 agent, 1 hook shipped together

Good fit Use it to examine error messages, reproduce problems, trace their causes, and then choose a fix for software issues.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/dollardill/beads-superpowers/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 DollarDill/beads-superpowers --skill systematic-debugging
Clone the repo
git clone --depth 1 https://github.com/DollarDill/beads-superpowers

Made for: Claude Code.

Or install beads-superpowers, the plugin that ships this one along with the rest of its 22 skills, 1 agent, 1 hook.

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/dollardill/beads-superpowers/systematic-debugging/github.svg)](https://agentmods.dev/skills/dollardill/beads-superpowers/systematic-debugging)
Your own site
<a href="https://agentmods.dev/skills/dollardill/beads-superpowers/systematic-debugging"><img src="https://agentmods.dev/badge/skills/dollardill/beads-superpowers/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/dollardill/beads-superpowers/systematic-debugging"><img src="https://agentmods.dev/badge/skills/dollardill/beads-superpowers/systematic-debugging.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 21 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,015 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
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 2 findings, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Privilege Escalation · line 100
    Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.
    Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
  • high Privilege Escalation · line 101
    Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.
    Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
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 $0.00021 $0.03015
Opus 5.5 $0.00008 $0.01206
Sonnet 5.5 $0.00004 $0.00603
Haiku 4.5 $0.00002 $0.00301

Measured 2mo ago against content hash 78549f56e920, 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.

The scan reads SKILL.md. This mod also ships 2 executable files (condition-based-waiting-example.ts, find-polluter.sh), 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/systematic-debugging/SKILL.md · 317 lines

How it starts

The opening of the file, as written. The whole thing — 317 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Systematic Debugging

Overview

Core principle: ALWAYS find root cause before attempting fixes. Symptom fixes are failure.

Violating the letter of this process is violating the spirit of debugging.

The Iron Law

NO FIXES WITHOUT ROOT CAUSE INVESTIGATION FIRST

If you haven't completed Phase 1, you cannot propose fixes.

When to Use

Use for ANY technical issue:

  • Test failures
  • Bugs in production
  • Unexpected behavior
  • Performance problems
  • Build failures
  • Integration issues

Use this ESPECIALLY when:

  • Under time pressure (emergencies make guessing tempting)
  • "Just one quick fix" seems obvious
  • You've already tried multiple fixes
  • Previous fix didn't work
  • You don't fully understand the issue

Don't skip when:

  • Issue seems simple (simple bugs have root causes too)
  • You're in a hurry (rushing guarantees rework)
  • Manager wants it fixed NOW (systematic is faster than thrashing)

The Four Phases

You MUST complete each phase before proceeding to the next.

Phase 1: Root Cause Investigation

BEFORE attempting ANY fix:

  1. Read Error Messages Carefully

    • Don't skip past errors or warnings
    • They often contain the exact solution
    • Read stack traces completely
    • Note line numbers, file paths, error codes
  2. Reproduce Consistently

    • Can you trigger it reliably?
    • What are the exact steps?
    • Does it happen every time?
    • If not reproducible → gather more data, don't guess
  3. Check Recent Changes

    • What changed that could cause this?
    • Git diff, recent commits
    • New dependencies, config changes
    • Environmental differences
    • For workflow-level issues (blocked beads, stuck execution): bd ready --explain shows dependency reasoning
    • Check the knowledge store for this symptom before investigating further: bd memories <symptom-keywords> (prior root-cause/lesson memories) and bd list --label <topic> --status all (+ bd search "<symptom>" --status all for decision/design knowledge-beads; error strings are body terms: add --desc-contains "<error-string>"; >10 hits: narrow the query, never triage truncated titles). Then read — hits are pointers, not knowledge: bd show <ids> every plausibly-matching prior decision/design, and bd recall <key> every plausibly-matching memory (bd memories prints truncated previews) — full bodies, before investigating further. 0 relevant does not mean none exist — re-angle the query once before emitting KB check: none. Emit KB check: N hits, M read + a one-line disposition each. If a prior root cause or decision already covers this, use it — don't re-debug something already understood.

Read the full file on GitHub · 317 lines

Files

What ships with it

5 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. 2mo ago First seen · 317 lines · 21 tokens per session scan A 78549f56e920

Subscribe to this mod's changes

systematic-debugging is a skill published in the GitHub repository DollarDill/beads-superpowers (32 stars, last pushed 6d ago), licensed MIT. It adds 21 tokens to every session and 3,015 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 2026-08-30.

Related

systematic-debugging compared with skills from other repositories

systematic-debugging next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
systematic-debuggingDollarDill/beads-superpowersSkill326d agoMITA21Claude Code
beads-onboardseanmartinsmith/sms-public-mktSkill328d agoMITA96Claude Code
systematic-debugging-codexmzored/superpowers-cc-to-codexSkill76mo agoMITA37Claude Code
release-itwondelai/skillsSkill2.6k4d agoMITA131Claude Code, Codex
tidewave-integrationoliver-kriska/claude-elixir-phoenixSkill574yesterdayMITA38Claude Code
anti-patternsavelikiy/great_ctoSkill1122d agoMITA59Claude Code
windows-compatsdsrss/code-graph-mcpSkill91yesterdayMITA165Claude Code, Codex