fire-debug

A structured debugging command that investigates a problem using persistent notes, isolated agent work, and validation steps. Its scientific-method approach means forming and testing possible causes instead of guessing.

In plain words
What is it for?
Use it to investigate errors such as a login failure, track debugging sessions, record hypotheses and next steps, consult a skills library, and optionally diagnose without applying a fix.
Why use it?
It helps keep complicated investigations organized and recoverable across sessions. It can separate diagnosis from implementation when you need the cause identified before changing code.

Command

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 commands/thierryn/fire-flow/fire-debug
Clone the repo
git clone --depth 1 https://github.com/ThierryN/fire-flow
Per session 16 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 4,672 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 $0.00016 $0.04672
Opus 5 $0.00008 $0.02336
Sonnet 5 $0.00003 $0.00934
Haiku 4.5 $0.00002 $0.00467

Measured 2d ago against content hash 8fe4c63134e9, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

fire-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 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.

commands/fire-debug.md · 659 lines

How it starts

The opening of the file, as written. The whole thing — 659 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/fire-debug

Systematic debugging with scientific method, persistent state recovery, and WARRIOR skills integration


Purpose

Debug issues using scientific method with subagent isolation. Combines Dominion Flow's proven debug orchestration with skills library (debugging patterns, domain knowledge) and honesty protocols.

Orchestrator role: Gather symptoms, spawn fire-debugger agent, handle checkpoints, spawn continuations.

Why subagent: Investigation burns context fast (reading files, forming hypotheses, testing). Fresh 200k context per investigation. Main context stays lean for user interaction.


Arguments

arguments:
  issue_description:
    required: false
    type: string
    description: "Brief description of the issue to debug"
    example: "/fire-debug login fails with 500 error"

optional_flags:
  --diagnose-only: "Find root cause but don't fix (for plan-based fixes)"
  --verbose: "Show detailed investigation progress"

Process

Step 1: Check Active Debug Sessions

ls .planning/debug/*.md 2>/dev/null | grep -v resolved | head -5

If active sessions exist AND no arguments:

  • Display sessions with status, hypothesis, next action
  • User picks number to resume OR describes new issue

If arguments provided OR user describes new issue:

  • Continue to symptom gathering

Step 2: WARRIOR Enhancement - Skills Check + Context7 Live Docs

Before investigating, check skills library for relevant debugging patterns:

/fire-search "[error type] debugging"
/fire-search "[technology] troubleshooting"

Load applicable skills:

  • @skills-library/debugging/ patterns
  • @skills-library/[domain]/ domain knowledge
  • @skills-library/integrations/ if external service involved

Context7 Live Documentation Lookup (v5.0):

If the issue involves a specific library/framework, pull current docs:

# Resolve the library
mcp__plugin_context7_context7__resolve-library-id(libraryName="{library}")

# Query for relevant API docs, known issues, migration notes
mcp__plugin_context7_context7__query-docs(libraryId="{resolved-id}", query="{specific error}")

Read the full file on GitHub · 659 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. 2d ago First seen · 659 lines · 16 tokens per session scan A 8fe4c63134e9

Subscribe to this mod's changes

fire-debug is a command published in the GitHub repository ThierryN/fire-flow (77 stars, last pushed 20d ago), licensed MIT. It adds 16 tokens to every session and 4,672 once invoked, about $0.0001 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.