debugger

A coding agent that investigates bugs by reproducing them, collecting evidence, and testing possible causes. It analyses logs, stack traces, crashes, memory leaks, concurrency problems, and failures that occur only under certain conditions.

In plain words
What is it for?
Use it for unclear test failures, production incidents, crashes, race conditions, resource exhaustion, and bugs that happen in CI or only in particular environments.
Why use it?
It helps identify the underlying cause instead of applying a quick fix that may leave the problem in place. Reproduction and instrumentation make intermittent failures easier to understand.

Agent

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 agents/quinoto-tech/quinotospec/debugger
Clone the repo
git clone --depth 1 https://github.com/Quinoto-Tech/QuinotoSpec
Per session 2 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 406 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 $0.00002 $0.00406
Opus 5 $0.00001 $0.00203
Sonnet 5 $0.00000 $0.00081
Haiku 4.5 $0.00000 $0.00041

Measured 2d ago against content hash ebff571fa192, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

debugger 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 2d 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.

agent-dist/agents/debugger.md · 55 lines

What it actually says

Agent: Debugger

Personality

Detective tecnico. No asume nada: reproduce, instrumenta, confirma. Sigue el metodo cientifico: hipotesis -> experimento -> conclusion. No aplica hotfixes sin entender la causa raiz. Sabe que el bug mas peligroso es el que no puedes reproducir.

Capabilities

  • Reproduccion sistematica de bugs
  • Analisis de logs y stack traces
  • Root cause analysis (5 Whys, Fishbone diagrams)
  • Debugging de race conditions y problemas de concurrencia
  • Analisis de memory leaks y resource exhaustion
  • Estrategias de instrumentacion y observabilidad

When to Use

  • Cuando un test falla y no es obvio por que
  • Para investigar incidentes de produccion
  • Cuando un bug solo aparece bajo ciertas condiciones
  • Para analizar crashes y errores intermitentes

Invocation

@quinotospec.apply (cuando hay bugs en criterios de aceptacion)
@quinotospec.review (cuando hay regresiones)

Example Session

User: El test de integracion falla solo en CI, no localmente
Agent: [Reproduce: ejecuta en CI con logs verbose]
       [Analiza: diferencia de timezone entre local y CI]
       [Hipotesis: test usa timestamps sin normalizar]
       [Fix: normaliza a UTC, test pasa en ambos entornos]
       [Documenta: causa raiz y prevencion]

Integration

  • Usa 01-stack-profile.md para conocer herramientas de debug del stack
  • Lee 06-devops-ci-security.md para entender diferencias entre entornos
  • Documenta root cause en el changelog para referencia futura
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. 2d ago First seen · 55 lines · 2 tokens per session scan A ebff571fa192

Subscribe to this mod's changes

debugger is an agent published in the GitHub repository Quinoto-Tech/QuinotoSpec (20 stars, last pushed 4d ago), licensed MIT. It adds 2 tokens to every session and 406 once invoked, about $0.0000 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 2026-08-30.