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error-trace-rootcause

error-trace-rootcause is a skill for Claude Code from felipeblassioli/agent-skills. It costs 267 tokens per session (2,192 once invoked), scanned A, original, no licence file.

A Google Cloud Logging investigation workflow that follows one request through its logs to locate the code causing a production error.

In plain words
What is it for?
Use it to investigate an Error Reporting group or Logs Explorer result and identify the underlying bug.
Why use it?
It connects an observed error to the request trail and offending code, reducing guesswork during incident diagnosis.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the blassioli plugin — 4 skills, 1 command shipped together

not rated 2repo 15d ago A scan 267 tokens no licence

Good fit Use it to investigate an Error Reporting group or Logs Explorer result and identify the underlying bug.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/felipeblassioli/agent-skills/error-trace-rootcause
View source ↗ felipeblassioli/agent-skills skills.sh
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.

Any agent
npx skills add felipeblassioli/agent-skills --skill error-trace-rootcause
Clone the repo
git clone --depth 1 https://github.com/felipeblassioli/agent-skills

Made for: Claude Code.

Or install blassioli, the plugin that ships this one along with the rest of its 4 skills, 1 command.

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 error-trace-rootcause

README.md
[![agentmods](https://agentmods.dev/badge/skills/felipeblassioli/agent-skills/error-trace-rootcause/github.svg)](https://agentmods.dev/skills/felipeblassioli/agent-skills/error-trace-rootcause)
Your own site
<a href="https://agentmods.dev/skills/felipeblassioli/agent-skills/error-trace-rootcause"><img src="https://agentmods.dev/badge/skills/felipeblassioli/agent-skills/error-trace-rootcause/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 error-trace-rootcause

Your own site · 80×15
<a href="https://agentmods.dev/skills/felipeblassioli/agent-skills/error-trace-rootcause"><img src="https://agentmods.dev/badge/skills/felipeblassioli/agent-skills/error-trace-rootcause.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 267 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,192 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 unknown 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 $0.00267 $0.02192
Opus 5.5 $0.00107 $0.00877
Sonnet 5.5 $0.00053 $0.00438
Haiku 4.5 $0.00027 $0.00219

Measured 2mo ago against content hash dc8fe73654f9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

error-trace-rootcause 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 2mo ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/logs-url-to-filter.sh, scripts/trace-trail.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/blassioli/skills/error-trace-rootcause/SKILL.md · 143 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

10 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 2mo ago First seen · 143 lines · 267 tokens per session scan A dc8fe73654f9

Subscribe to this mod's changes

error-trace-rootcause is a skill published in the GitHub repository felipeblassioli/agent-skills (2 stars, last pushed 15d ago), with no licence file. It adds 267 tokens to every session and 2,192 once invoked, about $0.0011 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 2026-09-03.

CloudDebuggingDevOps and cloud
Related

error-trace-rootcause compared with skills from other repositories

error-trace-rootcause next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
error-trace-rootcausefelipeblassioli/agent-skillsSkill215d agononeA267Claude Code
application-integration-troubleshootinggoogle/skillsSkill24kyesterdayApache-2.0A105Claude Code, Codex
pathways-workloadgoogle/skillsSkill24kyesterdayApache-2.0A178Claude Code, Codex
gke-workload-troubleshootinggoogle/skillsSkill24kyesterdayApache-2.0A69Claude Code, Codex
gke-workload-scaling-troubleshootinggoogle/skillsSkill24kyesterdayApache-2.0A170Claude Code, Codex
api-gateway-troubleshootinggoogle/skillsSkill24kyesterdayApache-2.0A196Claude Code, Codex
gke-ai-troubleshooting-node-unresponsive-timeoutgoogle/skillsSkill24kyesterdayApache-2.0A96Claude Code, Codex