diagnose-failure

diagnose-failure is a command for Claude Code from yeaight7/agent-powerups. It costs 23 tokens per session (216 once invoked), scanned A, original, Apache-2.0.

A command that examines an error message, log, stack trace, or failed state to find its underlying cause and propose a concrete fix.

In plain words
What is it for?
Use it to trace failures to application code, configuration, or an external dependency, then identify code or configuration changes and prevention steps.
Why use it?
It turns scattered failure details into an execution path and a specific explanation instead of generic debugging advice.

Command for Claude Code

Written for Claude Code: $ARGUMENTS substitution.

Part of the debugging-diagnostics plugin — 8 skills, 4 commands, 2 agents shipped together

Good fit Use it to trace failures to application code, configuration, or an external dependency, then identify code or configuration changes and prevention steps.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/yeaight7/agent-powerups/diagnose-failure
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.

Clone the repo
git clone --depth 1 https://github.com/yeaight7/agent-powerups

Made for: Claude Code.

Or install debugging-diagnostics, the plugin that ships this one along with the rest of its 8 skills, 4 commands, 2 agents.

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 diagnose-failure

README.md
[![agentmods](https://agentmods.dev/badge/commands/yeaight7/agent-powerups/diagnose-failure/github.svg)](https://agentmods.dev/commands/yeaight7/agent-powerups/diagnose-failure)
Your own site
<a href="https://agentmods.dev/commands/yeaight7/agent-powerups/diagnose-failure"><img src="https://agentmods.dev/badge/commands/yeaight7/agent-powerups/diagnose-failure/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 diagnose-failure

Your own site · 80×15
<a href="https://agentmods.dev/commands/yeaight7/agent-powerups/diagnose-failure"><img src="https://agentmods.dev/badge/commands/yeaight7/agent-powerups/diagnose-failure.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 23 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 216 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.
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 $0.00023 $0.00216
Opus 5.5 $0.00009 $0.00086
Sonnet 5.5 $0.00005 $0.00043
Haiku 4.5 $0.00002 $0.00022

Measured 1mo ago against content hash 95961984cfa8, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

diagnose-failure 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 1mo 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.

plugins/debugging-diagnostics/commands/diagnose-failure.md · 22 lines

What it actually says

Diagnose Failure

You are an expert in debugging and failure analysis. Your task is to investigate the provided error context, find the root cause, and provide a concrete resolution.

Context

$ARGUMENTS

Diagnostic Steps

  1. Analyze Symptoms: Review the provided logs, stack traces, or unexpected outputs.
  2. Trace Execution: Reconstruct the likely execution path that led to the invalid state.
  3. Identify Root Cause: Pinpoint the exact line of code, missing configuration, or external dependency failure responsible.
  4. Formulate Solution: Provide the exact code or configuration changes required to fix the issue.
  5. Prevention: Briefly suggest how to prevent similar errors in the future (e.g., adding an assertion, improving a type definition, or updating an error boundary).

Be concise and focus on actionable solutions. Do not generate generic debugging advice; tailor your response to the exact failure provided.

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. 1mo ago First seen · 22 lines · 23 tokens per session scan A 95961984cfa8

Subscribe to this mod's changes

diagnose-failure is a command published in the GitHub repository yeaight7/agent-powerups (6 stars, last pushed 19d ago), licensed Apache-2.0. It adds 23 tokens to every session and 216 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 2026-09-14.