Development

Programming, frameworks, implementation, frontend, backend, and app development

skills in category: 66,450
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Showing 14,209–14,232 of 66,450 skills

Python TestingAPython testing strategies using pytest, TDD methodology, fixtures, mocking, parametrization, and coverage requirements.developmentpythonrustVotes: 0GitHub stars: 26
Python PatternsAPythonic idioms, PEP 8 standards, type hints, and best practices for building robust, efficient, and maintainable Python applications.developmentpythongoVotes: 0GitHub stars: 26
Kafka PatternsASpring Kafka producer/consumer patterns, idempotent consumers, dead letter topics, and manual offset commits. Use when producing to or consuming from Kafka topics in a Spring Boot service.developmentjavaspringVotes: 0GitHub stars: 26
Frontend PatternsAFrontend development patterns for React, Next.js, state management, performance optimization, and UI best practices.developmenttypescriptgoVotes: 0GitHub stars: 26
Backend PatternsABackend architecture patterns, API design, database optimization, and server-side best practices for Node.js, Express, and Next.js API routes.developmenttypescriptgoVotes: 0GitHub stars: 26
Setup TrunkAUse when integrating trunk.io into a repository for the first time, or when configuring trunk linters, git hooks, and pre-commit/push validation in an existing codebase with legacy lint violations.developmentjavascripttypescriptVotes: 0GitHub stars: 2
Skills DirectorySkills Directory 3 slots · $399/mo · one ad per page · sponsors can never buy grades.See placements
Semantic CommitAUse when staged/unstaged changes mix multiple unrelated concerns and need splitting into clean conventional commits, or when asked for "semantic commits", "logical commits", or "커밋 분리". Works in any language or ecosystem.developmentgoshellVotes: 0GitHub stars: 2
Fix Osv VulnerabilitiesAUse when osv-scanner or trunk check reports dependency vulnerabilities (GHSA-*) in a pnpm/npm/yarn or Bundler project and you need to triage and fix them.developmentpythonrustVotes: 0GitHub stars: 2
Cspell TriageAUse when cspell reports unknown words or forbidden words in a repository, when adding entries to a cspell dictionary, when a cspell config needs setting up, consolidating, or auditing, or before trusting a cspell result run inside a git worktree or one that reports `Files checked: 0`.developmenttypescriptpythonVotes: 0GitHub stars: 2
WayfinderAChart an effort too big for one session as a map of decision tickets under docs/plans/, then resolve one ticket per session until the way to the destination is clear.developmentgoreactVotes: 0GitHub stars: 2
Log ItAUse when the user asks to record what a session discovered or learned ("기록해줘", "로그 남겨줘", "log this", "/log-it"), when a session ends after non-obvious findings or trial-and-error, or before /clear would lose them.developmentgoVotes: 0GitHub stars: 2
Context BudgetAAudits Claude Code context window consumption across agents, skills, MCP servers, and rules. Identifies bloat, redundant components, and produces prioritized token-savings recommendations.developmentgodebuggingVotes: 0GitHub stars: 2
Config GcAGarbage collection for the active Claude config root — scans skills, memory, hooks, permissions, MCP servers, and caches for redundant, stale, or orphaned items, then walks the user through confirm-each-deletion cleanup. Use on "clean up my config", "config GC", "too many skills", "my .claude is bloated", or a periodic review.developmentgoshellVotes: 0GitHub stars: 2
Zgc Generational InternalsAGenerational ZGC internals: coloured pointers without multi-mapping, the load and store barriers, the young and old cycles and their STW phases, the remembered-set bitmap and its double buffering, relocation and page management, allocation stalls, and the generational log and JFR event names. Use when a deploy script still carries -XX:+ZGenerational, when jdk.ZAllocationStall events appear or allocation stalls cluster in traffic peaks, when a pause script greps only "Pause Mark" and reports a...developmentgogitVotes: 0GitHub stars: 2
Zgc And ShenandoahAOperating ZGC and Shenandoah in production: concurrent relocation via coloured pointers and load barriers, the CPU the concurrent phases actually take, allocation stalls, and which flags still exist. Use when a service migrated to a concurrent collector and throughput dropped, when a GC log shows "Allocation Stall", when a pod of 1-2 CPUs runs ZGC or Shenandoah, when a config still carries -XX:+ZGenerational or G1 flags after the migration, when a ZGC-versus-Shenandoah comparison does not dec...developmentgojavaVotes: 0GitHub stars: 2
Virtual Threads InternalsADiagnose HotSpot virtual-thread mounting, heap stack chunks, FIFO work-stealing scheduling, carrier capture, residual native/VM-frame pinning after JEP 491, scheduler compensation boundaries and memory/GC effects without treating implementation details as API guarantees. Use when pin events, scheduler queue/pool growth, native calls or class initialization, CPU-ready virtual threads or retained suspended stacks explain a scalability regression on Java 21–25. Not introductory adoption (thread-...developmentjavaapiVotes: 0GitHub stars: 2
Virtual Thread MigrationAMigrating an existing service to virtual threads as a staged programme rather than a flag: inventorying what each thread pool was implicitly limiting, auditing for pinning, file I/O and ThreadLocal caches, declaring the replacement limits before the flip, canarying one workload at a time, re-sizing the connection pool, and the rollback criteria. Use when a team plans to enable virtual threads service-wide, when a single flag is about to be flipped in production, when a migration made latency ...developmentgojavaVotes: 0GitHub stars: 2
View And Representation PatternsAProducing the response: Template View, Transform View and Two Step View as three ways to turn a model into output, and what each becomes in a JSON API, a server-rendered page or a hypermedia fragment. Use when logic is accumulating inside templates, when a template triggers database queries during rendering, when the same data must be rendered in several formats and the mapping is duplicated per format, when a consistent look or envelope must be applied across every screen or endpoint, when e...developmentrustgoVotes: 0GitHub stars: 2
Varhandles And Memory OrderingADesigning and proving low-level Java variable access with VarHandle plain, opaque, acquire/release and volatile modes; compare-and-set/exchange, weak CAS, read-modify-write, fences, coordinates, signature-polymorphic typing, supported modes, and mixed-access hazards. Connects modes to synchronization edges and allowed outcomes, with model, generated-code and performance evidence when relevant. Use when selecting or reviewing low-level access modes, adapting existing handles or dynamic coordin...developmentgojavaVotes: 0GitHub stars: 2
Universal Scalability LawAFitting and falsifying the Universal Scalability Law (USL): load/resource definition, the scale coefficient gamma, contention alpha, coherency/retrograde beta, peak conditions, identifiability, uncertainty and held-out validation. Use when throughput saturates or falls as threads, users, cores or pods increase; when scale-out is proposed from too few points; or when comparing architectural scalability curves. Does not cover `L = λW`, queue/pool sizing (littles-law-and-queueing), latency-at-lo...developmentpythonjavaVotes: 0GitHub stars: 2
Unified LoggingAConstructing, validating and operating HotSpot unified JVM logging: exact versus wildcard tag-set selection, levels, outputs, decorators, file rotation, asynchronous drop/stall modes, runtime VM.log changes, environment-injected options and legacy-flag migration. Use when -Xlog is empty, excessive, missing after restart, rejected at startup, changed live with jcmd, mixed with container logs, or evaluated for overhead. Producing and preserving the intended evidence belongs here; interpretation...developmentjavasecurityVotes: 0GitHub stars: 2
Timeouts And DeadlinesABounding how long a call may take and propagating that bound: per-hop timeouts versus an absolute deadline, deadline propagation over HTTP and gRPC, remaining-budget arithmetic and refusing work that cannot finish, cooperative cancellation of abandoned callee work, and keeping connect, read, total and retry timeouts consistent. Use when a client sets a connect timeout but no request timeout, when Future.get() or join() is called with no bound, when a timeout is a round number repeated across ...developmentrustjavaVotes: 0GitHub stars: 2
Thread Sizing And Virtual ThreadsAChoose and size platform-thread pools or virtual-thread-per-task execution from workload shape, capacity evidence and lifecycle constraints. Covers CPU versus waiting, queue/admission policy, resource limits exposed by virtual-thread migration, ThreadLocal cost, naming, pinning boundaries after JEP 491, and Java 21/24/25 observability. Use when pool size, virtual-thread adoption or post-migration latency/resource pressure is under review.developmentjavareactVotes: 0GitHub stars: 2
Technical Debt DecisionsADeciding when a shortcut is a legitimate trade and when it is just damage: separating deliberate and inadvertent debt, constraints delivery pressure does not waive, containing a shortcut so it can be undone, recording it where someone will find it, and choosing which debt to repay by its carrying cost rather than by how much it annoys you. Use when a deadline or an incident is pushing work to be cut, when someone proposes shipping now and cleaning up later, when a spike is about to become pro...developmentgojavaVotes: 0GitHub stars: 2