debug-agent

A debugging workflow that uses runtime logs—records produced while software runs—to investigate a bug. It forms several possible explanations, adds temporary evidence-gathering logs, asks for a reproduction, and identifies the cause from the results.

In plain words
What is it for?
Use it when software behaves unexpectedly to reproduce the problem, compare possible causes, verify a fix, and remove temporary logging afterward.
Why use it?
It reduces guesswork by requiring observed evidence before changing code or claiming that a fix works.

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/reskin-games/memorybank-plus/debug-agent
Any agent
npx skills add ReSkin-Games/memorybank-plus --skill debug-agent
Clone the repo
git clone --depth 1 https://github.com/ReSkin-Games/memorybank-plus

Made for: Claude Code, Codex.

Per session 60 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,388 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 88% copy Near-identical to another mod 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 $0.00060 $0.02388
Opus 5 $0.00030 $0.01194
Sonnet 5 $0.00012 $0.00478
Haiku 4.5 $0.00006 $0.00239

Measured 3d ago against content hash cc8d357adb55, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

debug-agent 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 3d 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.

Origin

This is a copy

88% identical to debug-agent — 28 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

template/skills/debug-agent/SKILL.md · 174 lines

How it starts

The opening of the file, as written. The whole thing — 174 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Debug Mode

You are now in DEBUG MODE. You must debug with runtime evidence.

Why this approach: Traditional AI agents jump to fixes claiming 100% confidence, but fail due to lacking runtime information. They guess based on code alone. You cannot and must NOT fix bugs this way — you need actual runtime data.

Your systematic workflow:

  1. Generate 3-5 precise hypotheses about WHY the bug occurs (be detailed, aim for MORE not fewer)
  2. Instrument code with logs (see Logging section) to test all hypotheses in parallel
  3. Ask user to reproduce the bug. Provide clear, numbered reproduction steps. Remind the user to restart any apps/services if instrumented files are cached or bundled. Ask the user to confirm when done.
  4. Analyze logs: evaluate each hypothesis (CONFIRMED/REJECTED/INCONCLUSIVE) with cited log line evidence
  5. Fix only with 100% confidence and log proof; do NOT remove instrumentation yet
  6. Verify with logs: ask user to run again, compare before/after logs with cited entries
  7. If logs prove success and user confirms: remove logs and explain. If failed: FIRST remove any code changes from rejected hypotheses (keep only instrumentation and proven fixes), THEN generate NEW hypotheses from different subsystems and add more instrumentation
  8. After confirmed success: explain the problem and provide a concise summary of the fix (1-2 lines)

Critical constraints:

  • NEVER fix without runtime evidence first
  • ALWAYS rely on runtime information + code (never code alone)
  • Do NOT remove instrumentation before post-fix verification logs prove success and user confirms that there are no more issues
  • Fixes often fail; iteration is expected and preferred. Taking longer with more data yields better, more precise fixes

Logging

STEP 0: Start the logging server (MANDATORY BEFORE ANY INSTRUMENTATION)

CRITICAL: The server is a long-running process. You MUST run it in the BACKGROUND.

Run the debug server as a background process before any instrumentation. The server stays running for the entire debug session — it is NOT a one-shot command.

Read the full file on GitHub · 174 lines

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. 3d ago First seen · 174 lines · 60 tokens per session scan A cc8d357adb55

Subscribe to this mod's changes

debug-agent is a skill published in the GitHub repository ReSkin-Games/memorybank-plus (7 stars, last pushed 3mo ago), licensed MIT. It adds 60 tokens to every session and 2,388 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 88% identical to debug-agent, differing in 28 lines, and is treated as a copy.

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