Updated 2d ago
by mhylle
claude-skills-collection
Custom skills and agents for Claude Code - codebase research, context management, and implementation planning workflows
20 GitHub stars (20)
+1 in 16 days
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- 30 skills (30 skills found in its SKILL.md files)
- 1 forks (1 forks)
- 2d ago last update (Last updated 2d ago)
Install
Skills CLI
npx skills add mhylle/claude-skills-collection
Asks which skills and agents to install. Just one: npx skills add mhylle/claude-skills-collection --skill adr — add -g for every project.
Claude Code
git clone https://github.com/mhylle/claude-skills-collectioncp -r "claude-skills-collection/skills/adr" ~/.claude/skills/
Copies the adr skill into ~/.claude/skills/ for every project (use .claude/skills/ for one project). Repeat for the other skills listed below.
Plugin
/plugin marketplace add mhylle/claude-skills-collection
Run inside Claude Code if the repository ships a plugin marketplace, then pick plugins from /plugin.
Skills can run code on your machine — read the SKILL.md first.
What it does
In the author's own words, from each skill's SKILL.md — showing the first 30 of 38 files.
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adr
Document architectural decisions in standardized ADR format. This skill should be used when making significant technical decisions, choosing between approaches, establishing patterns, or when other skills (create-plan, implement-plan, brainstorm) identify decisions that need documentation. Triggers on "document decision", "create ADR", "architectural decision", or automatically when invoked by ot…
skills/adr/SKILL.md on GitHub (opens in a new tab) -
adversarial-reviewer
Adversarial code review that breaks the self-review monoculture by spawning three independent subagent personas (Saboteur, New Hire, Security Auditor) in parallel isolated contexts. Each subagent has no knowledge of the author's intent or Claude's prior conclusions — Claude cannot replicate that isolation on its own. Default mode reviews a diff (staged/unstaged, or explicit ref/file); `--codebase…
skills/adversarial-reviewer/SKILL.md on GitHub (opens in a new tab) -
agent-creator
Create composable AI agent systems in NestJS projects following the "tools all the way down" architecture. Use this skill when users want to: (1) Create new AI agents with orchestrator/planner/executor/evaluator components, (2) Build agentic systems that can call other agents as tools, (3) Implement DAG-based planning with parallel execution, (4) Add database-backed state persistence for agent ru…
skills/agent-creator/SKILL.md on GitHub (opens in a new tab) -
brainstorm
Interactive idea refinement using Socratic questioning methodology. This skill should be used when users want to explore an idea, find gaps in concepts, enhance proposals, or structure thoughts before implementation planning. Triggers on "brainstorm", "explore this idea", "find holes in", "help me think through", "what am I missing", or when presenting rough concepts that need refinement. Output…
skills/brainstorm/SKILL.md on GitHub (opens in a new tab) -
code-quality-audit
Run code quality audits covering test coverage, cyclomatic complexity, module sizes, dependency structure (cycles, fan-in/out), and mutation testing. Produces a prioritized report and acts as a quality gate. Use whenever the user wants to audit code quality, check coverage, find complex or oversized modules, detect dependency cycles, run mutation tests, assess technical debt, or gate a phase on q…
skills/code-quality-audit/SKILL.md on GitHub (opens in a new tab) -
code-review
Systematic code review for implementation phases verifying architectural principles, framework standards, ADR compliance, and code quality. This skill is invoked by implement-phase as part of its quality gate pipeline, or manually when reviewing code changes. Triggers on "review code", "code review", "/code-review", or automatically as Step 3 of implement-phase.
skills/code-review/SKILL.md on GitHub (opens in a new tab) -
codebase-audit
Long-running comprehensive adversarial audit of an entire codebase. Orchestrates partition-by-partition adversarial reviews by delegating to /adversarial-reviewer --codebase <partition>, then synthesizes a cross-partition risk register and a written remediation report. Unlike /adversarial-reviewer --codebase (which samples strategically from the whole repo in one pass), this skill methodically co…
skills/codebase-audit/SKILL.md on GitHub (opens in a new tab) -
codebase-research
Orchestrates comprehensive codebase research by decomposing user queries into parallel sub-agent tasks and synthesizing findings. This skill should be used when users ask questions about how code works, where functionality exists, how components interact, or need comprehensive documentation of existing implementations. It focuses exclusively on documenting and explaining the codebase as it exists…
skills/codebase-research/SKILL.md on GitHub (opens in a new tab) -
context-saver
Write the current session's in-flight work state to a human-readable handoff doc on disk (docs/context/CONTEXT-{topic}.md) so a future chat session — or another person — can pick up exactly where this one stops. Distinct from Claude Code's built-in memory system, which captures long-lived facts and preferences; this skill captures **active session context** (what's being built right now, which fi…
skills/context-saver/SKILL.md on GitHub (opens in a new tab) -
continuous-learning
Promote valuable session learnings into reusable, triggerable skill files in ~/.claude/skills/learned/. Unlike Claude Code's built-in memory (which captures conversational facts and preferences), this skill extracts structured patterns — error resolutions, user corrections, workarounds, debugging techniques, project conventions — that future sessions can match against specific triggers. Use at en…
skills/continuous-learning/SKILL.md on GitHub (opens in a new tab) -
create-plan
Create detailed implementation plans through interactive research and iteration. This skill should be used when creating new implementation plans, designing feature specifications, planning technical work, or when the user asks to plan an implementation. Triggers on requests like "create a plan", "plan the implementation", "design how to implement", or when given a feature/task that needs structu…
skills/create-plan/SKILL.md on GitHub (opens in a new tab) -
deep-brainstorm
Multi-session, resumable deep brainstorming with mindmap-on-disk structure. Explores ideas across multiple dimensions using creative methodologies (Morphological Analysis, TRIZ, Lateral Thinking, Lotus Blossom, Assumption Mapping). Sessions persist to filesystem and can span days. Triggers on "deep brainstorm", "deep dive brainstorm", "multi-session brainstorm", "brainstorm deeply", or when the u…
skills/deep-brainstorm/SKILL.md on GitHub (opens in a new tab) -
design-language
Design and manufacture someone's OWN reusable visual design language and save it as durable files — design tokens (css/tokens.css + a W3C design-tokens.json), a DESIGN_LANGUAGE.md contract, and a living multi-page styleguide — that future sessions and other projects read to build UI in one consistent, ownable style. Use this whenever the goal is to create, define, set up, or establish a design la…
skills/design-language/SKILL.md on GitHub (opens in a new tab) -
e2e-testing
Comprehensive E2E testing skill using Playwright MCP for systematic web application testing. This skill should be used when users need to test web-based systems end-to-end, set up test regimes, run exploratory tests, or analyze test history. Triggers on requests like "test my webapp", "set up E2E tests", "run the tests", "what's been flaky", or when validating web application functionality. The s…
skills/e2e-testing/SKILL.md on GitHub (opens in a new tab) -
eval-harness
Build evaluation harnesses for AI-assisted implementations — capability evals, regression tests, graders (exact-match, LLM-judge, code-exec, rubric), and standardized metrics (pass@k, accuracy, latency, cost). Use when the user wants to set up or run evals, benchmark agents/skills, create regression test suites for prompts or AI features, compare model/prompt variants, or measure implementation q…
skills/eval-harness/SKILL.md on GitHub (opens in a new tab) -
grumpy-reviewer
A single grumpy, nitpicky structural code reviewer that runs as an isolated subagent and treats the code as third-party work submitted by a junior programmer for validation. It cares about exactly one thing — maintainability — judged through separation of concerns, service-oriented design, helper-method extraction, small files, and the rule of 7 (as any grouping nears 7 members, it pushes for sub…
skills/grumpy-reviewer/SKILL.md on GitHub (opens in a new tab) -
implement-phase
Execute a single phase from an implementation plan with all quality gates. This skill is the unit of work for implement-plan, handling implementation, verification, code review, ADR compliance, and plan synchronization for ONE phase. Triggers when implement-plan delegates a phase, or manually with "/implement-phase" and a phase reference.
skills/implement-phase/SKILL.md on GitHub (opens in a new tab) -
implement-plan
Orchestrate the execution of complete implementation plans, delegating each phase to implement-phase skill. This skill manages the full plan lifecycle including phase sequencing, user confirmation between phases, and overall progress tracking. Triggers on "implement the plan", "execute the implementation plan", or when given a path to a plan file.
skills/implement-plan/SKILL.md on GitHub (opens in a new tab) -
iterate-plan
Update existing implementation plans through user feedback with thorough research and validation. Also migrates old checkbox-based plans to the new Task tools system. This skill should be used when iterating on implementation plans, updating plans based on new requirements, refining technical approaches in existing plans, migrating old plans to Task tools, or when the user wants to modify a previ…
skills/iterate-plan/SKILL.md on GitHub (opens in a new tab) -
prompt-generator
Generate implementation prompts for phase-based project execution using an orchestration pattern. Use when users request prompts for implementing project phases, need orchestration prompts for multi-step implementations, ask for "/prompt", "generate prompt", "create implementation prompt", or want to create structured implementation instructions for subagent delegation. Outputs the prompt to chat…
skills/prompt-generator/SKILL.md on GitHub (opens in a new tab) -
security-review
Comprehensive security audit for code changes. Use this skill when implementing authentication, authorization, user input handling, API endpoints, secrets/credentials, payment features, or file uploads. Provides security checklists, vulnerability patterns, and remediation guidance. Integrates with implement-phase as a security quality gate.
skills/security-review/SKILL.md on GitHub (opens in a new tab) -
ship-issue
One-command issue-to-merge pipeline orchestrator. Drives a GitHub issue through nine stages (preflight, plan, implement, review, ci, cloud_review, deploy, e2e, logs) with two human gates, persisting all run state to files so a crashed or interrupted run resumes losslessly. Triggers on "/ship-issue" with an issue number or URL. User-invoked only.
skills/ship-issue/SKILL.md on GitHub (opens in a new tab) -
skill-visualizer
Generate interactive HTML visualizations of the skills collection, codebase structure, or dependency graphs. Uses D3.js for interactive visualization with collapsible nodes, color-coded categories, and hover details. Triggers on "visualize skills", "generate skill map", "codebase visualization", or "show skill dependencies".
skills/skill-visualizer/SKILL.md on GitHub (opens in a new tab) -
strategic-compact
Suggest context compaction at optimal logical boundaries — between phases, after a research burst, after a debugging session ends — rather than waiting for the automatic compaction threshold to hit mid-task. Use when the user asks whether to compact, mentions context is getting long, wants to checkpoint before a big task, or when you notice the session is approaching a natural transition where co…
skills/strategic-compact/SKILL.md on GitHub (opens in a new tab) -
team-brainstorm
Adversarial brainstorming using agent teams for multi-perspective analysis. Use when users want thorough idea exploration with real debate between independent perspectives. Triggers on "team brainstorm", "adversarial brainstorm", "brainstorm with team", "debate this idea", or when the user explicitly requests team-based analysis. Higher token cost but significantly deeper analysis than single-age…
skills/team-brainstorm/SKILL.md on GitHub (opens in a new tab) -
team-create-plan
Team-based implementation planning with adversarial design review. Spawns an Architect, Risk Analyst, and Researcher who explore competing designs and challenge each other before producing a plan. Use when planning complex features, high-stakes changes, or when multiple valid approaches exist. Triggers on "team create plan", "team plan", "deep plan", or when the user explicitly wants team-based p…
skills/team-create-plan/SKILL.md on GitHub (opens in a new tab) -
team-implement-plan-full
Execute implementation plans with a full team — one implementer per phase running in parallel where the dependency graph allows, plus a shared cross-phase Reviewer. Phases execute in waves based on dependencies. Use for large plans with 4+ phases and independent work streams. Highest token cost but fastest execution for parallelizable work. Triggers on "full team implement", "parallel implement",…
skills/team-implement-plan-full/SKILL.md on GitHub (opens in a new tab) -
team-implement-plan
Execute implementation plans with a small review team (Implementer + Reviewer + optional Integrator). The Implementer writes code directly while the Reviewer provides adversarial quality checks per phase. Use for moderate-to-complex plans where real-time adversarial review catches issues that automated checks miss. Triggers on "team implement", "team implement plan", or when the user explicitly w…
skills/team-implement-plan/SKILL.md on GitHub (opens in a new tab) -
tt-brainstorm
Tasktracker-native Socratic brainstorming. Refines a raw idea into a frozen brainstorm document tree stored in tasktracker (NOT in docs/brainstorms/*.md), with every chosen/deferred/rejected option recorded as a decision and an optional one-way promotion into a task tree. Use whenever a user wants to brainstorm, explore, refine, or "think through" an idea AND the work is (or will be) tracked in t…
skills/tt-brainstorm/SKILL.md on GitHub (opens in a new tab) -
tt-create-plan
Tasktracker-native implementation planning. Turns a frozen brainstorm (or a clear requirement) into a phased plan persisted as tasktracker phase tasks — NOT as a docs/plans/*.md file. Creates requirements with formal acceptance criteria, registers architecture components, generates phases via createPhaseFromTemplate (backend-feature / ui-fix / refactor / schema-migration / bug-investigation / doc…
skills/tt-create-plan/SKILL.md on GitHub (opens in a new tab)
No skill matches that filter.
Review before you install
A skill is a set of instructions and scripts your agent will follow, and it can run code on your machine. Read the SKILL.md and any scripts first — this listing is not a security review.