underbell (kevin)

Software Engineer

I am a back-end devops engineer and Cloud Architecture.

Popular repositories

springboot-log4j2-slack Public

Log4j2 Slack Appender for SpringBoot2.x Webflux

Java 2 2

localstack-logging-test Public

JavaScript 1

log4j2-demo Public

Java 1

reactor-core Public

Forked from reactor/reactor-core

Non-Blocking Reactive Foundation for the JVM

Java 1

spring-boot Public

Forked from spring-projects/spring-boot

Spring Boot

Java 1

spring-boot-properties Public

Java 1

blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks"); } } catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); } })(); (function(){ try { var __m = "github.com"; var __re = new RegExp('^' + "github\\.com" + ' Skip to contentNavigation Menu Sign inAppearance settings AI CODE CREATIONGitHub CopilotWrite better code with AI GitHub Copilot appDirect agents from issue to merge MCP RegistryIntegrate external tools DEVELOPER WORKFLOWSActionsAutomate any workflow CodespacesInstant dev environments IssuesPlan and track work Code ReviewManage code changes Code QualityEnforce quality at merge APPLICATION SECURITYGitHub Advanced SecurityFind and fix vulnerabilities Code securitySecure your code as you build Secret protectionStop leaks before they start EXPLOREWhy GitHub Documentation Blog Changelog Marketplace View all features BY COMPANY SIZEEnterprises Small and medium teams Startups Nonprofits BY USE CASEApp Modernization DevSecOps DevOps CI/CD View all use cases BY INDUSTRYHealthcare Financial services Manufacturing Government View all industries View all solutions EXPLORE BY TOPICAI Software Development DevOps Security View all topics EXPLORE BY TYPECustomer stories Events & webinars Ebooks & reports Business insights GitHub Skills SUPPORT & SERVICESDocumentation Customer support Community forum Trust center Partners View all resources COMMUNITYGitHub SponsorsFund open source developers PROGRAMSSecurity Lab Maintainer Community GitHub Stars Archive Program REPOSITORIESTopics Trending Collections ENTERPRISE SOLUTIONSEnterprise platformAI-powered developer platform AVAILABLE ADD-ONSGitHub Advanced SecurityEnterprise-grade security features Copilot for BusinessEnterprise-grade AI features Premium SupportEnterprise-grade 24/7 support Pricing Sign in Sign upAppearance settings You signed in with another tab or window. Reload to refresh your session.You signed out in another tab or window. Reload to refresh your session.You switched accounts on another tab or window. Reload to refresh your session.Dismiss alert underbellFollow Overview Repositories 82 Projects 0 Packages 0 Stars 617 More Overview Repositories Projects Packages Stars underbellFollow kevin underbell Follow back-end and devops engineer 18 followers · 72 following Yongin, in Korea https://www.facebook.com/underbell.park Achievements Achievements Organizations Block or report underbell Block user Prevent this user from interacting with your repositories and sending you notifications. Learn more about blocking users. You must be logged in to block users. Close all issues, pull requests, and discussions opened by this user Content in all repositories owned by your account will be closed. Add an optional note Maximum 250 characters. Please don’t include any personal information such as legal names or email addresses. Markdown is supported. This note will only be visible to you. Report abuse Contact GitHub support about this user’s behavior. Learn more about reporting abuse. Report abuse Overview Repositories 82 Projects 0 Packages 0 Stars 617 More Overview Repositories Projects Packages Stars underbell/README.md Software Engineer I am a back-end devops engineer and Cloud Architecture. Popular repositories Loading springboot-log4j2-slack springboot-log4j2-slackPublic Log4j2 Slack Appender for SpringBoot2.x Webflux Java 2 2 localstack-logging-test localstack-logging-testPublic JavaScript 1 log4j2-demo log4j2-demoPublic Java 1 reactor-core reactor-corePublic Forked from reactor/reactor-core Non-Blocking Reactive Foundation for the JVM Java 1 spring-boot spring-bootPublic Forked from spring-projects/spring-boot Spring Boot Java 1 spring-boot-properties spring-boot-propertiesPublic Java 1 Something went wrong, please refresh the page to try again. If the problem persists, check the GitHub status page or contact support. Uh oh! There was an error while loading. Please reload this page. Footer © 2026 GitHub, Inc. Footer navigation Terms Privacy Security Status Community Docs Contact You can’t perform that action at this time. , 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix"); } } catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' Skip to contentNavigation Menu Sign inAppearance settings AI CODE CREATIONGitHub CopilotWrite better code with AI GitHub Copilot appDirect agents from issue to merge MCP RegistryIntegrate external tools DEVELOPER WORKFLOWSActionsAutomate any workflow CodespacesInstant dev environments IssuesPlan and track work Code ReviewManage code changes Code QualityEnforce quality at merge APPLICATION SECURITYGitHub Advanced SecurityFind and fix vulnerabilities Code securitySecure your code as you build Secret protectionStop leaks before they start EXPLOREWhy GitHub Documentation Blog Changelog Marketplace View all features BY COMPANY SIZEEnterprises Small and medium teams Startups Nonprofits BY USE CASEApp Modernization DevSecOps DevOps CI/CD View all use cases BY INDUSTRYHealthcare Financial services Manufacturing Government View all industries View all solutions EXPLORE BY TOPICAI Software Development DevOps Security View all topics EXPLORE BY TYPECustomer stories Events & webinars Ebooks & reports Business insights GitHub Skills SUPPORT & SERVICESDocumentation Customer support Community forum Trust center Partners View all resources COMMUNITYGitHub SponsorsFund open source developers PROGRAMSSecurity Lab Maintainer Community GitHub Stars Archive Program REPOSITORIESTopics Trending Collections ENTERPRISE SOLUTIONSEnterprise platformAI-powered developer platform AVAILABLE ADD-ONSGitHub Advanced SecurityEnterprise-grade security features Copilot for BusinessEnterprise-grade AI features Premium SupportEnterprise-grade 24/7 support Pricing Sign in Sign upAppearance settings You signed in with another tab or window. Reload to refresh your session.You signed out in another tab or window. Reload to refresh your session.You switched accounts on another tab or window. Reload to refresh your session.Dismiss alert underbellFollow Overview Repositories 82 Projects 0 Packages 0 Stars 617 More Overview Repositories Projects Packages Stars underbellFollow kevin underbell Follow back-end and devops engineer 18 followers · 72 following Yongin, in Korea https://www.facebook.com/underbell.park Achievements Achievements Organizations Block or report underbell Block user Prevent this user from interacting with your repositories and sending you notifications. Learn more about blocking users. You must be logged in to block users. Close all issues, pull requests, and discussions opened by this user Content in all repositories owned by your account will be closed. Add an optional note Maximum 250 characters. Please don’t include any personal information such as legal names or email addresses. Markdown is supported. This note will only be visible to you. Report abuse Contact GitHub support about this user’s behavior. Learn more about reporting abuse. Report abuse Overview Repositories 82 Projects 0 Packages 0 Stars 617 More Overview Repositories Projects Packages Stars underbell/README.md Software Engineer I am a back-end devops engineer and Cloud Architecture. Popular repositories Loading springboot-log4j2-slack springboot-log4j2-slackPublic Log4j2 Slack Appender for SpringBoot2.x Webflux Java 2 2 localstack-logging-test localstack-logging-testPublic JavaScript 1 log4j2-demo log4j2-demoPublic Java 1 reactor-core reactor-corePublic Forked from reactor/reactor-core Non-Blocking Reactive Foundation for the JVM Java 1 spring-boot spring-bootPublic Forked from spring-projects/spring-boot Spring Boot Java 1 spring-boot-properties spring-boot-propertiesPublic Java 1 Something went wrong, please refresh the page to try again. If the problem persists, check the GitHub status page or contact support. Uh oh! There was an error while loading. Please reload this page. Footer © 2026 GitHub, Inc. Footer navigation Terms Privacy Security Status Community Docs Contact You can’t perform that action at this time. , 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms"); } } catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' Skip to contentNavigation Menu Sign inAppearance settings AI CODE CREATIONGitHub CopilotWrite better code with AI GitHub Copilot appDirect agents from issue to merge MCP RegistryIntegrate external tools DEVELOPER WORKFLOWSActionsAutomate any workflow CodespacesInstant dev environments IssuesPlan and track work Code ReviewManage code changes Code QualityEnforce quality at merge APPLICATION SECURITYGitHub Advanced SecurityFind and fix vulnerabilities Code securitySecure your code as you build Secret protectionStop leaks before they start EXPLOREWhy GitHub Documentation Blog Changelog Marketplace View all features BY COMPANY SIZEEnterprises Small and medium teams Startups Nonprofits BY USE CASEApp Modernization DevSecOps DevOps CI/CD View all use cases BY INDUSTRYHealthcare Financial services Manufacturing Government View all industries View all solutions EXPLORE BY TOPICAI Software Development DevOps Security View all topics EXPLORE BY TYPECustomer stories Events & webinars Ebooks & reports Business insights GitHub Skills SUPPORT & SERVICESDocumentation Customer support Community forum Trust center Partners View all resources COMMUNITYGitHub SponsorsFund open source developers PROGRAMSSecurity Lab Maintainer Community GitHub Stars Archive Program REPOSITORIESTopics Trending Collections ENTERPRISE SOLUTIONSEnterprise platformAI-powered developer platform AVAILABLE ADD-ONSGitHub Advanced SecurityEnterprise-grade security features Copilot for BusinessEnterprise-grade AI features Premium SupportEnterprise-grade 24/7 support Pricing Sign in Sign upAppearance settings You signed in with another tab or window. Reload to refresh your session.You signed out in another tab or window. Reload to refresh your session.You switched accounts on another tab or window. Reload to refresh your session.Dismiss alert underbellFollow Overview Repositories 82 Projects 0 Packages 0 Stars 617 More Overview Repositories Projects Packages Stars underbellFollow kevin underbell Follow back-end and devops engineer 18 followers · 72 following Yongin, in Korea https://www.facebook.com/underbell.park Achievements Achievements Organizations Block or report underbell Block user Prevent this user from interacting with your repositories and sending you notifications. Learn more about blocking users. You must be logged in to block users. Close all issues, pull requests, and discussions opened by this user Content in all repositories owned by your account will be closed. Add an optional note Maximum 250 characters. Please don’t include any personal information such as legal names or email addresses. Markdown is supported. This note will only be visible to you. Report abuse Contact GitHub support about this user’s behavior. Learn more about reporting abuse. Report abuse Overview Repositories 82 Projects 0 Packages 0 Stars 617 More Overview Repositories Projects Packages Stars underbell/README.md Software Engineer I am a back-end devops engineer and Cloud Architecture. Popular repositories Loading springboot-log4j2-slack springboot-log4j2-slackPublic Log4j2 Slack Appender for SpringBoot2.x Webflux Java 2 2 localstack-logging-test localstack-logging-testPublic JavaScript 1 log4j2-demo log4j2-demoPublic Java 1 reactor-core reactor-corePublic Forked from reactor/reactor-core Non-Blocking Reactive Foundation for the JVM Java 1 spring-boot spring-bootPublic Forked from spring-projects/spring-boot Spring Boot Java 1 spring-boot-properties spring-boot-propertiesPublic Java 1 Something went wrong, please refresh the page to try again. If the problem persists, check the GitHub status page or contact support. Uh oh! There was an error while loading. Please reload this page. Footer © 2026 GitHub, Inc. Footer navigation Terms Privacy Security Status Community Docs Contact You can’t perform that action at this time. , 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links"); } } catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); } })(); (function(){ try { var __m = "youtube.com"; var __re = new RegExp('^' + "youtube\\.com" + ' Skip to contentNavigation Menu Sign inAppearance settings AI CODE CREATIONGitHub CopilotWrite better code with AI GitHub Copilot appDirect agents from issue to merge MCP RegistryIntegrate external tools DEVELOPER WORKFLOWSActionsAutomate any workflow CodespacesInstant dev environments IssuesPlan and track work Code ReviewManage code changes Code QualityEnforce quality at merge APPLICATION SECURITYGitHub Advanced SecurityFind and fix vulnerabilities Code securitySecure your code as you build Secret protectionStop leaks before they start EXPLOREWhy GitHub Documentation Blog Changelog Marketplace View all features BY COMPANY SIZEEnterprises Small and medium teams Startups Nonprofits BY USE CASEApp Modernization DevSecOps DevOps CI/CD View all use cases BY INDUSTRYHealthcare Financial services Manufacturing Government View all industries View all solutions EXPLORE BY TOPICAI Software Development DevOps Security View all topics EXPLORE BY TYPECustomer stories Events & webinars Ebooks & reports Business insights GitHub Skills SUPPORT & SERVICESDocumentation Customer support Community forum Trust center Partners View all resources COMMUNITYGitHub SponsorsFund open source developers PROGRAMSSecurity Lab Maintainer Community GitHub Stars Archive Program REPOSITORIESTopics Trending Collections ENTERPRISE SOLUTIONSEnterprise platformAI-powered developer platform AVAILABLE ADD-ONSGitHub Advanced SecurityEnterprise-grade security features Copilot for BusinessEnterprise-grade AI features Premium SupportEnterprise-grade 24/7 support Pricing Sign in Sign upAppearance settings You signed in with another tab or window. Reload to refresh your session.You signed out in another tab or window. Reload to refresh your session.You switched accounts on another tab or window. Reload to refresh your session.Dismiss alert underbellFollow Overview Repositories 82 Projects 0 Packages 0 Stars 617 More Overview Repositories Projects Packages Stars underbellFollow kevin underbell Follow back-end and devops engineer 18 followers · 72 following Yongin, in Korea https://www.facebook.com/underbell.park Achievements Achievements Organizations Block or report underbell Block user Prevent this user from interacting with your repositories and sending you notifications. Learn more about blocking users. You must be logged in to block users. Close all issues, pull requests, and discussions opened by this user Content in all repositories owned by your account will be closed. Add an optional note Maximum 250 characters. Please don’t include any personal information such as legal names or email addresses. Markdown is supported. This note will only be visible to you. Report abuse Contact GitHub support about this user’s behavior. Learn more about reporting abuse. Report abuse Overview Repositories 82 Projects 0 Packages 0 Stars 617 More Overview Repositories Projects Packages Stars underbell/README.md Software Engineer I am a back-end devops engineer and Cloud Architecture. Popular repositories Loading springboot-log4j2-slack springboot-log4j2-slackPublic Log4j2 Slack Appender for SpringBoot2.x Webflux Java 2 2 localstack-logging-test localstack-logging-testPublic JavaScript 1 log4j2-demo log4j2-demoPublic Java 1 reactor-core reactor-corePublic Forked from reactor/reactor-core Non-Blocking Reactive Foundation for the JVM Java 1 spring-boot spring-bootPublic Forked from spring-projects/spring-boot Spring Boot Java 1 spring-boot-properties spring-boot-propertiesPublic Java 1 Something went wrong, please refresh the page to try again. If the problem persists, check the GitHub status page or contact support. Uh oh! There was an error while loading. Please reload this page. Footer © 2026 GitHub, Inc. Footer navigation Terms Privacy Security Status Community Docs Contact You can’t perform that action at this time. , 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default"); } } catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' Skip to contentNavigation Menu Sign inAppearance settings AI CODE CREATIONGitHub CopilotWrite better code with AI GitHub Copilot appDirect agents from issue to merge MCP RegistryIntegrate external tools DEVELOPER WORKFLOWSActionsAutomate any workflow CodespacesInstant dev environments IssuesPlan and track work Code ReviewManage code changes Code QualityEnforce quality at merge APPLICATION SECURITYGitHub Advanced SecurityFind and fix vulnerabilities Code securitySecure your code as you build Secret protectionStop leaks before they start EXPLOREWhy GitHub Documentation Blog Changelog Marketplace View all features BY COMPANY SIZEEnterprises Small and medium teams Startups Nonprofits BY USE CASEApp Modernization DevSecOps DevOps CI/CD View all use cases BY INDUSTRYHealthcare Financial services Manufacturing Government View all industries View all solutions EXPLORE BY TOPICAI Software Development DevOps Security View all topics EXPLORE BY TYPECustomer stories Events & webinars Ebooks & reports Business insights GitHub Skills SUPPORT & SERVICESDocumentation Customer support Community forum Trust center Partners View all resources COMMUNITYGitHub SponsorsFund open source developers PROGRAMSSecurity Lab Maintainer Community GitHub Stars Archive Program REPOSITORIESTopics Trending Collections ENTERPRISE SOLUTIONSEnterprise platformAI-powered developer platform AVAILABLE ADD-ONSGitHub Advanced SecurityEnterprise-grade security features Copilot for BusinessEnterprise-grade AI features Premium SupportEnterprise-grade 24/7 support Pricing Sign in Sign upAppearance settings You signed in with another tab or window. Reload to refresh your session.You signed out in another tab or window. Reload to refresh your session.You switched accounts on another tab or window. Reload to refresh your session.Dismiss alert underbellFollow Overview Repositories 82 Projects 0 Packages 0 Stars 617 More Overview Repositories Projects Packages Stars underbellFollow kevin underbell Follow back-end and devops engineer 18 followers · 72 following Yongin, in Korea https://www.facebook.com/underbell.park Achievements Achievements Organizations Block or report underbell Block user Prevent this user from interacting with your repositories and sending you notifications. Learn more about blocking users. You must be logged in to block users. Close all issues, pull requests, and discussions opened by this user Content in all repositories owned by your account will be closed. Add an optional note Maximum 250 characters. Please don’t include any personal information such as legal names or email addresses. Markdown is supported. This note will only be visible to you. Report abuse Contact GitHub support about this user’s behavior. Learn more about reporting abuse. Report abuse Overview Repositories 82 Projects 0 Packages 0 Stars 617 More Overview Repositories Projects Packages Stars underbell/README.md Software Engineer I am a back-end devops engineer and Cloud Architecture. Popular repositories Loading springboot-log4j2-slack springboot-log4j2-slackPublic Log4j2 Slack Appender for SpringBoot2.x Webflux Java 2 2 localstack-logging-test localstack-logging-testPublic JavaScript 1 log4j2-demo log4j2-demoPublic Java 1 reactor-core reactor-corePublic Forked from reactor/reactor-core Non-Blocking Reactive Foundation for the JVM Java 1 spring-boot spring-bootPublic Forked from spring-projects/spring-boot Spring Boot Java 1 spring-boot-properties spring-boot-propertiesPublic Java 1 Something went wrong, please refresh the page to try again. If the problem persists, check the GitHub status page or contact support. Uh oh! There was an error while loading. Please reload this page. Footer © 2026 GitHub, Inc. Footer navigation Terms Privacy Security Status Community Docs Contact You can’t perform that action at this time. , 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers"); } } catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' Skip to contentNavigation Menu Sign inAppearance settings AI CODE CREATIONGitHub CopilotWrite better code with AI GitHub Copilot appDirect agents from issue to merge MCP RegistryIntegrate external tools DEVELOPER WORKFLOWSActionsAutomate any workflow CodespacesInstant dev environments IssuesPlan and track work Code ReviewManage code changes Code QualityEnforce quality at merge APPLICATION SECURITYGitHub Advanced SecurityFind and fix vulnerabilities Code securitySecure your code as you build Secret protectionStop leaks before they start EXPLOREWhy GitHub Documentation Blog Changelog Marketplace View all features BY COMPANY SIZEEnterprises Small and medium teams Startups Nonprofits BY USE CASEApp Modernization DevSecOps DevOps CI/CD View all use cases BY INDUSTRYHealthcare Financial services Manufacturing Government View all industries View all solutions EXPLORE BY TOPICAI Software Development DevOps Security View all topics EXPLORE BY TYPECustomer stories Events & webinars Ebooks & reports Business insights GitHub Skills SUPPORT & SERVICESDocumentation Customer support Community forum Trust center Partners View all resources COMMUNITYGitHub SponsorsFund open source developers PROGRAMSSecurity Lab Maintainer Community GitHub Stars Archive Program REPOSITORIESTopics Trending Collections ENTERPRISE SOLUTIONSEnterprise platformAI-powered developer platform AVAILABLE ADD-ONSGitHub Advanced SecurityEnterprise-grade security features Copilot for BusinessEnterprise-grade AI features Premium SupportEnterprise-grade 24/7 support Pricing Sign in Sign upAppearance settings You signed in with another tab or window. Reload to refresh your session.You signed out in another tab or window. Reload to refresh your session.You switched accounts on another tab or window. Reload to refresh your session.Dismiss alert underbellFollow Overview Repositories 82 Projects 0 Packages 0 Stars 617 More Overview Repositories Projects Packages Stars underbellFollow kevin underbell Follow back-end and devops engineer 18 followers · 72 following Yongin, in Korea https://www.facebook.com/underbell.park Achievements Achievements Organizations Block or report underbell Block user Prevent this user from interacting with your repositories and sending you notifications. Learn more about blocking users. You must be logged in to block users. Close all issues, pull requests, and discussions opened by this user Content in all repositories owned by your account will be closed. Add an optional note Maximum 250 characters. Please don’t include any personal information such as legal names or email addresses. Markdown is supported. This note will only be visible to you. Report abuse Contact GitHub support about this user’s behavior. Learn more about reporting abuse. Report abuse Overview Repositories 82 Projects 0 Packages 0 Stars 617 More Overview Repositories Projects Packages Stars underbell/README.md Software Engineer I am a back-end devops engineer and Cloud Architecture. Popular repositories Loading springboot-log4j2-slack springboot-log4j2-slackPublic Log4j2 Slack Appender for SpringBoot2.x Webflux Java 2 2 localstack-logging-test localstack-logging-testPublic JavaScript 1 log4j2-demo log4j2-demoPublic Java 1 reactor-core reactor-corePublic Forked from reactor/reactor-core Non-Blocking Reactive Foundation for the JVM Java 1 spring-boot spring-bootPublic Forked from spring-projects/spring-boot Spring Boot Java 1 spring-boot-properties spring-boot-propertiesPublic Java 1 Something went wrong, please refresh the page to try again. If the problem persists, check the GitHub status page or contact support. Uh oh! There was an error while loading. Please reload this page. Footer © 2026 GitHub, Inc. Footer navigation Terms Privacy Security Status Community Docs Contact You can’t perform that action at this time. , 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode"); } } catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); } })(); })(); Skip to contentNavigation Menu Sign inAppearance settings AI CODE CREATIONGitHub CopilotWrite better code with AI GitHub Copilot appDirect agents from issue to merge MCP RegistryIntegrate external tools DEVELOPER WORKFLOWSActionsAutomate any workflow CodespacesInstant dev environments IssuesPlan and track work Code ReviewManage code changes Code QualityEnforce quality at merge APPLICATION SECURITYGitHub Advanced SecurityFind and fix vulnerabilities Code securitySecure your code as you build Secret protectionStop leaks before they start EXPLOREWhy GitHub Documentation Blog Changelog Marketplace View all features BY COMPANY SIZEEnterprises Small and medium teams Startups Nonprofits BY USE CASEApp Modernization DevSecOps DevOps CI/CD View all use cases BY INDUSTRYHealthcare Financial services Manufacturing Government View all industries View all solutions EXPLORE BY TOPICAI Software Development DevOps Security View all topics EXPLORE BY TYPECustomer stories Events & webinars Ebooks & reports Business insights GitHub Skills SUPPORT & SERVICESDocumentation Customer support Community forum Trust center Partners View all resources COMMUNITYGitHub SponsorsFund open source developers PROGRAMSSecurity Lab Maintainer Community GitHub Stars Archive Program REPOSITORIESTopics Trending Collections ENTERPRISE SOLUTIONSEnterprise platformAI-powered developer platform AVAILABLE ADD-ONSGitHub Advanced SecurityEnterprise-grade security features Copilot for BusinessEnterprise-grade AI features Premium SupportEnterprise-grade 24/7 support Pricing Sign in Sign upAppearance settings You signed in with another tab or window. Reload to refresh your session.You signed out in another tab or window. Reload to refresh your session.You switched accounts on another tab or window. Reload to refresh your session.Dismiss alert underbellFollow Overview Repositories 82 Projects 0 Packages 0 Stars 617 More Overview Repositories Projects Packages Stars underbellFollow kevin underbell Follow back-end and devops engineer 18 followers · 72 following Yongin, in Korea https://www.facebook.com/underbell.park Achievements Achievements Organizations Block or report underbell Block user Prevent this user from interacting with your repositories and sending you notifications. Learn more about blocking users. You must be logged in to block users. Close all issues, pull requests, and discussions opened by this user Content in all repositories owned by your account will be closed. Add an optional note Maximum 250 characters. Please don’t include any personal information such as legal names or email addresses. Markdown is supported. This note will only be visible to you. Report abuse Contact GitHub support about this user’s behavior. Learn more about reporting abuse. Report abuse Overview Repositories 82 Projects 0 Packages 0 Stars 617 More Overview Repositories Projects Packages Stars underbell/README.md Software Engineer I am a back-end devops engineer and Cloud Architecture. Popular repositories Loading springboot-log4j2-slack springboot-log4j2-slackPublic Log4j2 Slack Appender for SpringBoot2.x Webflux Java 2 2 localstack-logging-test localstack-logging-testPublic JavaScript 1 log4j2-demo log4j2-demoPublic Java 1 reactor-core reactor-corePublic Forked from reactor/reactor-core Non-Blocking Reactive Foundation for the JVM Java 1 spring-boot spring-bootPublic Forked from spring-projects/spring-boot Spring Boot Java 1 spring-boot-properties spring-boot-propertiesPublic Java 1 Something went wrong, please refresh the page to try again. If the problem persists, check the GitHub status page or contact support. 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