systematic-debugging

systematic-debugging is a skill for Claude Code from DDS-Solutions/AI-TadPole-OS. It costs 25 tokens per session (1,257 once invoked), scanned A, original, MIT.

A four-phase method for debugging software by reproducing the problem, finding its root cause, applying a fix, and checking the result with evidence.

In plain words
What is it for?
Use it to investigate bugs in applications, APIs, command-line tools, and end-to-end flows, then verify that the fix resolves the original failure.
Why use it?
It replaces guesswork with a repeatable investigation and requires a failing test or other tight reproduction before changing code.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Good fit Use it to investigate bugs in applications, APIs, command-line tools, and end-to-end flows, then verify that the fix resolves the original failure.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/dds-solutions/ai-tadpole-os/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 DDS-Solutions/AI-TadPole-OS --skill systematic-debugging
Clone the repo
git clone --depth 1 https://github.com/DDS-Solutions/AI-TadPole-OS

Made for: Claude Code.

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/dds-solutions/ai-tadpole-os/systematic-debugging/github.svg)](https://agentmods.dev/skills/dds-solutions/ai-tadpole-os/systematic-debugging)
Your own site
<a href="https://agentmods.dev/skills/dds-solutions/ai-tadpole-os/systematic-debugging"><img src="https://agentmods.dev/badge/skills/dds-solutions/ai-tadpole-os/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/dds-solutions/ai-tadpole-os/systematic-debugging"><img src="https://agentmods.dev/badge/skills/dds-solutions/ai-tadpole-os/systematic-debugging.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 25 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,257 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 pass 7 Sept 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 $0.00025 $0.01257
Opus 5.5 $0.00010 $0.00503
Sonnet 5.5 $0.00005 $0.00251
Haiku 4.5 $0.00003 $0.00126

Measured 5d ago against content hash 9dbd89f49cfd, 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 5d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/reproduction_runner.py), 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.

.agent/skills/systematic-debugging/SKILL.md · 95 lines

How it starts

The opening of the file, as written. The whole thing — 95 lines — stays where its author put it; the contents beside it link to each section on GitHub.

[!IMPORTANT] AI Context & Knowledge Heritage

  • Subsystem: Agent Skills Registry / systematic-debugging
  • Architecture: @docs ARCHITECTURE:Documentation
  • Failure Path: Shotgun debugging, speculative guesswork, unverified fixes, or flaky reproduction loops.
  • Observability: Traceability via execution/parity_guard.py ([SKILL])

Systematic Debugging & RCA Protocol

Philosophy: Never touch code or propose speculative fixes until a tight, red-capable reproduction test proves the defect. Eliminate guesswork through binary hypothesis discrimination and 5-Whys root cause analysis.
Workflow Bindings: Integrated directly into /debug and /anneal.


🎯 Progressive Disclosure & L3 Reference Index

Read the core Sovereign debugging rules below; consult deep L3 Reference Guides on demand:

L3 Reference Guide Purpose Trigger / When to Load
references/rca_and_hypothesis_testing.md Hypothesis discrimination tables, 5-Whys root cause chains, and Point of Divergence schemas Isolating elusive bugs & architecting regression tests
scripts/reproduction_runner.py Automated reproduction runner measuring execution latency and testing for command flakiness Establishing tight (<2s) reproduction loops

🔄 1. The 4-Phase Debugging Process

[PHASE 1: REPRODUCE] ───> [PHASE 2: ISOLATE] ───> [PHASE 3: ROOT CAUSE] ───> [PHASE 4: VERIFY]
 Build minimal, fast      Formulate competing    Find point of divergence     Prove green pass &
 red failing test (<2s)   hypotheses ($H_A/H_B$) via telemetry map           add permanent test

Phase 1: Reproduce & Tighten Feedback Loop

  • 🛑 STRICT GATE: Do NOT modify code or hypothesize fixes until a tight, red-capable reproduction command is built and verified.
  • Criteria:
    • Red-Capable: Fails on the user's exact symptom before any fix is applied.
    • Deterministic: 100% reproducible (use reproduction_runner.py --flaky-check to measure stability).
    • Fast: Completes in $< 2$ seconds.

Read the full file on GitHub · 95 lines

Files

What ships with it

2 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. 5d ago Changed · -32 lines 9dbd89f49cfd
  2. 1mo ago First seen · 127 lines · 25 tokens per session scan A 4e1aea15c230

Subscribe to this mod's changes

systematic-debugging is a skill published in the GitHub repository DDS-Solutions/AI-TadPole-OS (8 stars, last pushed yesterday), licensed MIT. It adds 25 tokens to every session and 1,257 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 2026-09-03.

Related

Other skills, from other repositories

test-electron-app

Drive the real running PostHog Electron app (live tRPC, workspace-server, real data) over CDP with agent-browser. Connect to the running app on port 9222, test desktop changes against a local Django stack, snapshot the accessibility tree, inspect network requests, and screenshot only when explicitly asked. Use when…

PostHog/posthog · 112 tokens

verify-bug

Post-merge UAT verification workflow. Walks JIRA reproduce steps, performs comparative audits (Before/After), attaches evidence to JIRA, and transitions status on PASS.

HoangNguyen0403/agent-skills-standard · 39 tokens

fixing-flaky-tests

Guides an agent through reproducing, root-causing, fixing, and validating flaky tests in the PostHog monorepo. Use when a test fails intermittently in CI but passes on rerun or locally, when hogli ci:insights or the debugging-ci-failures skill classifies a failure as a flaky test, when given a GitHub Actions URL for a…

PostHog/posthog · 220 tokens

extending-hobby-smoke-tests

Design, extend, review, or debug PostHog Hobby end-to-end smoke tests in bin/hobby-ci.py and .github/workflows/ci-hobby.yml. Use when adding an ingestion round trip, deciding whether a product belongs in Hobby CI, changing the CI Hobby service topology or API-key scopes, or diagnosing a smoke test that captures data…

PostHog/posthog · 83 tokens

extending-personhog-test-harness

When and how to add scenarios, chaos events, and invariants to the personhog e2e test harness (rust/personhog-test-harness). Use after fixing a bug or regression in the personhog leader path (leader, router, writer, replica, coordination protocol) so the fix gets a permanent regression scenario; when adding a new…

PostHog/posthog · 134 tokens

agent-upkeep

Perform one small, scoped maintenance improvement to the Elements monorepo and open a single reviewable pull request. Use this skill for scheduled or unattended upkeep runs that improve unit test coverage for one file, fix one behavioral bug in one module, or move one off ESLint rule toward enforcement to reduce…

NVIDIA/elements · 115 tokens