--- title: "Lada Kesseler (@lexler) skills · skilld" canonical_url: "https://skilld.dev/gh/lexler" meta: description: "28 agent skills written by Lada Kesseler on skilld." "og:description": "28 agent skills written by Lada Kesseler." "og:title": "Lada Kesseler on skilld" --- ` ![Avatar for Lada Kesseler](https://skilld.dev/_img/avatar?url=https%3A%2F%2Fgithub.com%2Flexler.png) # **Lada Kesseler** [@lexler](https://github.com/lexler)person 28 skills 238 Synced 1 month ago [GitHub](https://github.com/lexler) ## Skills ### [lexler/skill-factory](https://skilld.dev/gh/lexler/skill-factory) 28 skills 238 `npx skilld add lexler/skill-factory` - [ **/ai-patterns**238 Reference patterns for augmented coding with AI. Use when discussing AI coding patterns, anti-patterns, obstacles, context management, steering AI, or looking up Lexler's patterns collection. /ai-patterns by lexler](https://skilld.dev/gh/lexler/skill-factory/ai-patterns) - [ **/align**238 Presents a proposed approach in progressive confirmable chunks with recommended decisions and alternatives. Use when aligning on a design, plan, or technical approach before implementation. /align by lexler](https://skilld.dev/gh/lexler/skill-factory/align) - [ **/anthropic-skill-creator**238 Create new skills, modify and improve existing skills, and measure skill performance. Use when users want to create a skill from scratch, edit, or optimize an existing skill, run evals to test a skill, benchmark skill performance with variance analysis, or optimize a skill's description for better triggering accuracy. /anthropic-skill-creator by lexler](https://skilld.dev/gh/lexler/skill-factory/anthropic-skill-creator) - [ **/approval-tests**238 Writes approval tests (snapshot/golden master testing) for Python, JavaScript/TypeScript, or Java. Use when verifying complex output, characterization testing legacy code, testing combinations, or working with .approved/.received files. /approval-tests by lexler](https://skilld.dev/gh/lexler/skill-factory/approval-tests) - [ **/bdd-with-approvals**238 Scannable BDD tests written in domain language. Use when doing BDD. /bdd-with-approvals by lexler](https://skilld.dev/gh/lexler/skill-factory/bdd-with-approvals) - [ **/c4-diagrams**238 Creates C4 architecture diagrams for designing, documenting, or understanding software architecture. Use when working through system design, mapping existing codebases, or visualizing structure at any level from system landscape down to code. /c4-diagrams by lexler](https://skilld.dev/gh/lexler/skill-factory/c4-diagrams) - [ **/collaborative-design**238 Designs software features collaboratively through visual scenarios and iterative refinement. Use when designing features, tools, UIs, workflows, or any system before implementation. /collaborative-design by lexler](https://skilld.dev/gh/lexler/skill-factory/collaborative-design) - [ **/creating-hooks**238 Creates Claude Code hooks. /creating-hooks by lexler](https://skilld.dev/gh/lexler/skill-factory/creating-hooks) - [ **/creating-process-files**238 Creates process files - text as code instructions for reliable AI workflows. Use when creating new process files. /creating-process-files by lexler](https://skilld.dev/gh/lexler/skill-factory/creating-process-files) - [ **/demo-with-narration**238 Demos working software: first proves every claimed behavior by exercising the real artifact, then replays the proof as a slow, voice-narrated walkthrough. Use when the user asks for a demo or to be shown that something works. /demo-with-narration by lexler](https://skilld.dev/gh/lexler/skill-factory/demo-with-narration) - [ **/event-modeling**238 Designs systems using Event Modeling. /event-modeling by lexler](https://skilld.dev/gh/lexler/skill-factory/event-modeling) - [ **/extract-knowledge**238 Extracts what the session learned into prose that stands alone, or reviews existing text through the same distortion lenses. /extract-knowledge by lexler](https://skilld.dev/gh/lexler/skill-factory/extract-knowledge) - [ **/git-worktrees**238 Creates git worktrees for parallel development. Use when creating a git worktree, setting up multiple working directories, or working on features in parallel. /git-worktrees by lexler](https://skilld.dev/gh/lexler/skill-factory/git-worktrees) - [ **/growing-outside-in-systems**238 Drive feature development using Outside-In TDD with Hexagonal Architecture. Design emerges through inline code, in-memory fakes, interface extraction, and deferred I/O. Use when building features, writing tests, or structuring backend services. Triggers on: TDD, outside-in, hexagonal, ports and adapters, emergent design, acceptance test, component test, walking skeleton, in-memory fakes, component, contract test, adapter, fast tests, sub-second feedback. Language-agnostic (Go, Rust, Python, TypeScript, Java, C#). /growing-outside-in-systems by lexler](https://skilld.dev/gh/lexler/skill-factory/growing-outside-in-systems) - [ **/hexagonal-architecture**238 Applies hexagonal (ports & adapters) architecture. Use when designing application structure, separating domain from infrastructure, creating testable boundaries, or when user mentions ports, adapters, hexagonal, or clean architecture. /hexagonal-architecture by lexler](https://skilld.dev/gh/lexler/skill-factory/hexagonal-architecture) - [ **/hotspots**238 Find where a codebase actually costs time by mining its git history (Tornhill hotspot analysis). Produces ranked refactoring targets with evidence, change-coupling seams, and a do-not-refactor list; re-run after refactoring to verify it paid off. /hotspots by lexler](https://skilld.dev/gh/lexler/skill-factory/hotspots) - [ **/launching-agent-teams**238 Launches agent teams with structured roles and task decomposition. Use when asked to create a team, spawn teammates, or coordinate multiple agents in parallel. /launching-agent-teams by lexler](https://skilld.dev/gh/lexler/skill-factory/launching-agent-teams) - [ **/nullables**238 Nullables — testing technique alternative to using mocking libraries. Use when writing unit tests, when code touches external I/O or state (HTTP, databases, files, clock, random) anywhere in its dependency chain, when making a system testable, or when tests are slow or flaky. /nullables by lexler](https://skilld.dev/gh/lexler/skill-factory/nullables) - [ **/playwright-cli**238 Drive a browser from the terminal with playwright-cli: snapshot the page, then act on elements by ref. Use when automating browser interactions, filling web forms, testing UIs, or driving logged-in web apps from the command line. /playwright-cli by lexler](https://skilld.dev/gh/lexler/skill-factory/playwright-cli) - [ **/refactoring**238 Refactoring process. Invoke immediately when user or document mentions refactoring, or proactively when code gets too complex or messy. /refactoring by lexler](https://skilld.dev/gh/lexler/skill-factory/refactoring) - [ **/refactoring-team**238 Iterative code refactoring through progressive lenses via a worker-reviewer agent team. /refactoring-team by lexler](https://skilld.dev/gh/lexler/skill-factory/refactoring-team) - [ **/refinement-loop**238 Iterative refinement through multiple passes. Use when the user asks to 'meditate on', 'distill', 'refine', or 'iterate on' something, or proactively when a problem benefits from multiple passes rather than a single attempt. /refinement-loop by lexler](https://skilld.dev/gh/lexler/skill-factory/refinement-loop) - [ **/socratic-learning**238 Facilitates deep, structured learning of a topic — gathering source material, assessing the learner's gaps, then teaching through guided Socratic sessions. Use when someone wants to genuinely study or be tutored on a subject over time, not get a quick answer. /socratic-learning by lexler](https://skilld.dev/gh/lexler/skill-factory/socratic-learning) - [ **/tdd**238 Test-driven development (TDD) process used when writing code. Use whenever you are adding any new code, unless the user explicitly asks to skip TDD or the code is exploratory/spike. /tdd by lexler](https://skilld.dev/gh/lexler/skill-factory/tdd) - [ **/using-uv**238 Python package and project management with UV. Use when creating Python scripts, initializing projects, or managing dependencies. /using-uv by lexler](https://skilld.dev/gh/lexler/skill-factory/using-uv) - [ **/writing-bash-scripts**238 Bash script style guide. Always use when writing bash scripts, shell scripts, or CLI bash tools. /writing-bash-scripts by lexler](https://skilld.dev/gh/lexler/skill-factory/writing-bash-scripts) - [ **/writing-for-agents**238 Writing documents for agents. Use when creating or editing skills, or modifying AGENTS.md or CLAUDE.md. /writing-for-agents by lexler](https://skilld.dev/gh/lexler/skill-factory/writing-for-agents) - [ **/writing-statuslines**238 Writes Claude Code status line scripts. Use when creating, customizing, or debugging statusline configurations. /writing-statuslines by lexler](https://skilld.dev/gh/lexler/skill-factory/writing-statuslines) Curated skills from @lexler. Checked GitHub just now