This skill should be used when diagnosing a reported bug, intermittent failure, stuck operation, or performance regression and isolating its cause with reproducible evidence.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Diagnose the reported symptom
Preserve the assigned role and the user's authorization. QA and reliability assignments remain
investigation or verification unless repair is assigned. Write or run tests, add instrumentation,
or alter product code only when authorized. Reading this workflow grants no additional tools
or permissions. Read relevant repository instructions, glossary, and architectural decisions.
## Establish an exact signal
Record the user's symptom, expected result, environment, version, input, and relevant state.
Choose the smallest permitted observation that exercises the actual failing path: an existing
targeted test, a CLI fixture, an HTTP request, trace replay, or the product journey. Use Oya
Browser exclusively for browser reproduction, screenshots, and automation. Read the Oya skill
first. Use available native tools for native UI. Preserve the person's live sessions and tabs.
Use scratch data and separate resources. Capture only the lines needed to show the symptom;
redact credentials, auth headers, personal data, and sensitive payloads before sharing or saving.
Keep secrets in existing protected environment/configuration rather than command text.
…
The line at the top of this page pins the label git:20261021.2ea469d, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (4059 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag
Source
GitHub
oyadotai/oya-browser · 351 stars · license a license file GitHub does not identify · pushed 2026-10-31 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_f3lv7azjnwtb6xrd
GET https://markdownregistry.com/api/v1/resolve?ref=oyadotai/oya-browser/diagnosing-bugs
GET https://markdownregistry.com/api/v1/blob/ea30e6254740f21f0c4585e91502d5fa1e4ce47340fab28a5cd9fee65a46991b
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
oyadotai/oya-browser · .agents/skills/browser-agent/SKILL.md · Control a real browser via Oya Browser MCP tools. Use this skill when the user asks you to browse the web, interact…
oyadotai/oya-browser · .agents/skills/code-review/SKILL.md · This skill should be used when reviewing a branch, pull request, working tree, or changes since a commit for repository…
oyadotai/oya-browser · .agents/skills/codebase-design/SKILL.md · This skill should be used when designing a module interface, reducing coupling, choosing dependency seams, improving…
oyadotai/oya-browser · .agents/skills/diagnosing-bugs/SKILL.md · This skill should be used when diagnosing a reported bug, intermittent failure, stuck operation, or performance…
oyadotai/oya-browser · .agents/skills/frontend-design/SKILL.md · Create distinctive, production-grade frontend interfaces with high design quality. Use this skill when the user asks to…
oyadotai/oya-browser · .agents/skills/frontend/SKILL.md · Use when building or changing anything in the frontend: a page, a component, a layout, styling, copy on screen…
oyadotai/oya-browser · .agents/skills/oya-browser/SKILL.md · This skill should be used when opening a website, researching current documentation, testing a web UI, taking browser…
oyadotai/oya-browser · .agents/skills/research/SKILL.md · This skill should be used when researching a technical question, checking current API facts, comparing documented…
oyadotai/oya-browser · .agents/skills/team-work/SKILL.md · This skill should be used when scoping a feature, designing a surface, planning architecture, reviewing a diff…
oyadotai/oya-browser · .agents/skills/writing-for-agents/SKILL.md · This skill should be used when creating or editing skills, agent definitions, AGENTS.md, CLAUDE.md, or reference…
oyadotai/oya-browser · .claude/skills/code-review/SKILL.md · This skill should be used when reviewing a branch, pull request, working tree, or changes since a commit for repository…
kunolu/640-skills · sbtd-workflow-onboard/assets/external-skills/stable/skills/diagnosing-bugs/SKILL.md · Diagnosis loop for hard bugs and performance regressions. Use when the user says "diagnose"/"debug this", or reports…
mxyhi/ok-skills · diagnosing-bugs/SKILL.md · Diagnosis loop for hard bugs and performance regressions. Use when the user says "diagnose"/"debug this", or reports…
asymmetric-al/core · .agents/skills/diagnosing-bugs/SKILL.md · Diagnosis loop for hard bugs and performance regressions. Use when the user says "diagnose"/"debug this", or reports…
oyadotai/oya-browser · .agents/skills/diagnosing-bugs/SKILL.md · This skill should be used when diagnosing a reported bug, intermittent failure, stuck operation, or performance…
jellydn/my-ai-tools · skills/diagnosing-bugs/SKILL.md · Build a tight, red-capable feedback loop before diagnosing failures, then minimize, test ranked hypotheses, and lock…
jellydn/my-ai-tools · configs/amp/plugins/my-ai-tools-skills/skills/diagnosing-bugs/SKILL.md · Build a tight, red-capable feedback loop before diagnosing failures, then minimize, test ranked hypotheses, and lock…
gtapps/hermitd · plugins/hermitd-dev/skills/diagnosing-bugs/SKILL.md · Diagnosis loop for hard bugs and performance regressions. Builds a red-capable feedback loop and runs it before…
