Diagnose Backend Bug

by QoderAI

Diagnose Backend Bug is a Quality skill for Claude Code, published by QoderAI in better-harness.

1.9K stars158 forkson QoderAI/better-harnessAdded 2026/08/18+4% in starsRepository updated 2026/08/17

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agent-pluginclaude-codecodexcursorharness-designharness-engineeringloop-engineeringqoderskill

Install in seconds

Install Diagnose Backend Bug

Copy Diagnose Backend Bug into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/QoderAI/better-harness/tree/main/case-studies/agent-customize/bug-diagnosis-skills/diagnose-backend-bug ~/.claude/skills/diagnose-backend-bug

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/QoderAI/better-harness.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: case-studies/agent-customize/bug-diagnosis-skills/diagnose-backend-bug/SKILL.md in QoderAI/better-harness
Installs to: ~/.claude/skills/diagnose-backend-bug
Collection: One of 9 skills cataloged from this repository
Category: Quality — 1354 skills

What Diagnose Backend Bug does

Diagnose Backend Bug diagnoses bounded backend or multi-service failures by correlating evidence from issue trackers, logs, traces, and job records before repair, using the project's observability route.

Diagnose Backend Bug is cataloged under Quality on DirSkills. Diagnose Backend Bug comes from a repository tagged agent-plugin, claude-code, codex, cursor and harness-design.

Documentation

README

Excerpt

Diagnose Backend Bug

Operating Boundary

Produce an evidence-backed diagnosis package. Read Observability for AI Debugging before inspecting the target route. Do not add a logger, collector, trace field, debug endpoint, dependency, or production probe under this Skill. Do not edit product code, create a branch, commit, push, update an issue, or create a PR/MR.

If the user separately authorizes repair or delivery, hand the diagnosis to the selected Goal Completion owner and require it to rerun the same scenario and relevant targeted checks.

Normalize Issue Evidence

This is the opening of the README. Read the full README on GitHub.

Frequently asked about Diagnose Backend Bug

What else does QoderAI publish alongside Diagnose Backend Bug?
Diagnose Backend Bug is one of 9 skills that DirSkills catalogs from QoderAI/better-harness, the repository it ships in. Its siblings there include Better Harness, Change Traceability Review and Handoff. Each one is a separate skill with its own page in this directory, installs the same way Diagnose Backend Bug does, and is maintained by QoderAI in that same repository. The rest of the collection is listed on the QoderAI/better-harness page.
How does Diagnose Backend Bug compare to other Quality skills?
Diagnose Backend Bug ranks #567 by stars among the 1354 Quality skills in this catalog. The most-starred ones next to it are Benchmark, Benchmark Optimization Loop and API Design Patterns. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Diagnose Backend Bug against them. Open each page to compare what they document and how they install.