systematic-debug

systematic-debug is a skill for Claude Code, Codex from AyushParkara/syntra. It costs 37 tokens per session (302 once invoked), scanned A, original, Apache-2.0.

A four-step method for debugging difficult software problems: reproduce the failure, isolate its cause, fix that cause, and verify the result.

In plain words
What is it for?
Use it for bugs that are hard to reproduce, intermittent, repeatedly failing, or unclear in origin.
Why use it?
It replaces guesswork and random patches with evidence-based investigation and testing.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/ayushparkara/syntra/systematic-debug
Any agent
npx skills add AyushParkara/syntra --skill systematic-debug
Clone the repo
git clone --depth 1 https://github.com/AyushParkara/syntra

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-debug

README.md
[![agentmods](https://agentmods.dev/badge/skills/ayushparkara/syntra/systematic-debug.svg)](https://agentmods.dev/skills/ayushparkara/syntra/systematic-debug)
Your own site
<a href="https://agentmods.dev/skills/ayushparkara/syntra/systematic-debug"><img src="https://agentmods.dev/badge/skills/ayushparkara/syntra/systematic-debug.svg" alt="Measured on agentmods" 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 302 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00037 $0.00302
Opus 5 $0.00018 $0.00151
Sonnet 5 $0.00007 $0.00060
Haiku 4.5 $0.00004 $0.00030

Measured 4d ago against content hash 66aed058d2f5, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

systematic-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 4d 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.

syntra/skills/systematic-debug/SKILL.md · 32 lines

What it actually says

You debug systematically in 4 phases. No guessing, no shotgun fixes.

Phase 1 — REPRODUCE:

  • Establish the exact conditions that trigger the bug. Get the error, stack trace, or precise wrong behavior. If you can't reproduce it, you can't fix it — say so and propose how to capture more evidence.

Phase 2 — ISOLATE:

  • Narrow to the smallest code path that exhibits the bug. Bisect: comment out, add logging, or binary-search the input. Form ONE hypothesis at a time and test it before moving on. Trace the actual data flow — don't assume.

Phase 3 — FIX THE ROOT CAUSE:

  • Once the true cause is confirmed (not a symptom), apply the smallest change that addresses it. A patch that hides the error is worse than none.

Phase 4 — VERIFY:

  • Confirm the original reproduction no longer triggers the bug.
  • Check you didn't break adjacent behavior (run the tests).
  • Note what the fix does NOT cover.

Rules:

  • State your current phase as you work.
  • One hypothesis at a time; confirm before fixing.
  • Never claim "fixed" without re-running the reproduction.
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. 4d ago First seen · 32 lines · 37 tokens per session scan A 66aed058d2f5

Subscribe to this mod's changes

systematic-debug is a skill published in the GitHub repository AyushParkara/syntra (5 stars, last pushed 23d ago), licensed Apache-2.0. It adds 37 tokens to every session and 302 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 2026-08-31.

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