python-programming
Master Python fundamentals, OOP, data structures, async programming, and production-grade scripting for data engineering
sql-databases
SQL query optimization, schema design, indexing strategies, and relational database mastery for production data systems
statistics-math
Statistics, probability, linear algebra, and mathematical foundations for data science
testing-quality
pytest, data validation, Great Expectations, and quality assurance for data systems
cicd-pipelines
GitHub Actions, GitLab CI, Jenkins, and automated deployment pipelines
assumption-mapping
Surface, prioritize, and track risky assumptions before investing significant effort. Use when starting a new project, before major feature work, when feeling uncertain about direction, when the user says "I think users want...", "we assume...", "probably...", or before any build decision that hasn't been validated with real users.
heuristic-evaluation
Systematic usability evaluation using established heuristics (Nielsen's 10, Shneiderman's 8, or custom rubrics). Use when reviewing UI designs, screenshots, prototypes, or live products for usability issues. Triggers on "review this design", "what's wrong with this UI", "usability check", "evaluate this interface", or when user shares screenshots/mockups asking for feedback.
prd-generation
Generate lean, actionable Product Requirements Documents from upstream design thinking artifacts or raw input. Use when a user needs to define what they're building with enough structure to guide development but without enterprise bloat. Outputs a PRD that feeds directly into UX specs and development prompts.
problem-framing
Extract and structure fuzzy product ideas into validated problem statements, target users, and jobs-to-be-done. Use when a user has a raw idea, concept, or solution in mind but hasn't clearly articulated the problem, target user, or assumptions. This skill helps users communicate context to coding agents more effectively, reducing iteration cycles and "that's not what I meant" moments.
prompt-export
Convert structured UX specs and product context into a sequenced prompts.md file for Claude Code. Use when a user has completed upstream design thinking (problem framing, PRD, UX spec) and needs to translate that into step-by-step prompts that coding agents can execute incrementally. This skill bridges design artifacts to code generation.
solution-scoping
Prioritize features and define MVP boundaries based on problem framing and user models. Use when a user has validated their problem and understands their users but needs to decide what to build first. Outputs feature priorities, MVP scope, and explicit cuts that feed into PRD generation.
user-modeling
Create lightweight user personas and usage scenarios from problem framing or raw research. Use when a user needs to clarify who they're building for beyond a basic target user description. Outputs practical personas and scenarios that inform feature priorities and UX decisions—not marketing fluff.
ux-specification
Translate PRDs into detailed UX specifications including user flows, screen descriptions, components, and interaction patterns. Use when a user has a PRD and needs to define the concrete UI/UX before generating development prompts. Bridges product requirements to implementation details.
ask-questions
Clarify requirements before implementing. Do not use automatically, only when invoked explicitly.
create-plan
Create a scoped, code-backed implementation plan from a todo, spec, issue, review notes, or raw user instructions. Use when the user asks to convert requirements into a proper plan, phased implementation plan, executor handoff plan, or reviewable planning artifact before coding.
implement-plan
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review-spec
Review a spec document against codebase reality, identifying gaps and ensuring sound, robust implementations.
audit
Survey any codebase as a senior advisor and produce prioritized, self-contained implementation plans for OTHER models/agents to execute. Strictly read-only on source code — never implements, fixes, or refactors anything itself. Use when asked to audit a codebase, find improvement opportunities (bugs, security, performance, test coverage, tech debt, migrations, DX), suggest features or where to take the project next (roadmap, product direction), or generate handoff plans for another agent to implement.
code-quality-review
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cursor-cli
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diagnose-issue
Research and define codebase issues before implementation planning. Use when the user provides an issue statement, bug report, Jira ticket, vague problem, proposed solution, runtime symptom, or design concern and wants Codex to inspect the current codebase, validate whether the problem exists, diagnose likely causes, compare solution directions, and produce an evidence-backed problem definition. Do not use when the user asks for a step-by-step implementation plan, direct implementation, or code review of an existing diff.
handoff-work
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interrogator
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react-to-review
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review-implementation
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blueprint
Turn a working session — the docs, issues, and half-formed ideas you've fed in, plus anything you point it at — into a spec and then a set of self-contained, executable implementation plans for OTHER models/agents to build. A senior architect that plans but never implements. Use when you have that context in hand and want it distilled into a PRD-style spec and broken into dependency-ordered, verifiable work items. Publishes to the repo's configured issue tracker or to markdown files.
code-refactor-review
Reviews code changes for reuse, composition, codebase consistency, and slop. Use when asked to review PRs/diffs, check code reuse, composition, cleanliness, or whether code fits the codebase.
npm-supply-chain-security
Audit and harden Node.js projects against npm supply chain attacks — compromised maintainer accounts, malicious package versions, and install-script payloads. Use when reviewing or setting up package.json, lockfiles, .npmrc, Dockerfile, or CI workflows for security; when the user mentions npm security, supply chain attacks, `npm audit`, lockfile policy, install scripts, or min-release-age; also when the user wants to check whether their dependencies are safe, or recover from a suspected compromise.
val-town-cli
Manage Val Town projects using the vt CLI. Use when working with Vals (Val Town serverless functions), syncing code to Val Town, creating HTTP endpoints, streaming logs, or managing Val Town branches. Triggers on tasks involving Val Town development, val creation/editing, or when user mentions "vt", "val town", or "vals".
goal-refiner
Use when the user gives a rough idea, broad objective, unfinished `/goal`, plan, issue, visual target, optimization target, or research task and wants it refined into a concise Codex Goal contract with one durable objective, clear boundaries, realistic environment, measurable progress, evidence-based completion, checkpoints, cleanup, blockers, and an output strictly under the hard cap of 4,000 characters.
html-tools
Build single-file HTML tools — self-contained HTML+JS+CSS applications that solve a specific problem without a build step. Use this skill whenever the user asks to build a utility, converter, viewer, debugger, or any small interactive web tool. Also trigger when the user says "build me a tool that...", "make a quick app for...", "I need a single-file HTML page that...", or wants to create something that could be hosted as a static file. This skill is specifically for practical, utility-focused tools (not landing pages, portfolios, or marketing sites — use frontend-design for those).
ideation
Guides structured ideation through Socratic questioning to explore problems, opportunities, and solutions. Use when brainstorming features, exploring use cases, or thinking through new ideas.
implementation-guide
Generate comprehensive implementation guides for coding tasks instead of writing code directly. Use when the user requests detailed implementation documentation, step-by-step development guides, or when they want to implement features themselves using tools like Cursor. Creates exhaustive guides with background context, architecture decisions, milestones with verification points, and rationale for a "build-it-yourself" workflow.
logging-best-practices
Use before implementing logs in a medium to large scale production system.
quiz-gate
Gate merges and commits of AI-implemented work behind a comprehension quiz that the USER must pass. Use this whenever a nontrivial implementation is complete and the user is about to commit, merge, open a PR, or ship — or whenever the user says "quiz me", "gate this", "do I understand this", or asks to review AI-generated changes before accepting them. Also use proactively at the end of any substantial implementation session, even if the user doesn't ask, offer the quiz before suggesting a commit.
react-effect-patterns
Guidelines for proper React useEffect usage and avoiding unnecessary Effects. Use when writing, reviewing, or refactoring React components that use useEffect, useState, or handle side effects. Triggers on tasks involving React Effects, derived state, event handlers, data fetching, or component synchronization.
tufte-viz
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wireframe
Produce low-fidelity black-and-white UI wireframes as standalone SVG files. Use when asked to wireframe a screen, page, or flow, make a low-fi mockup or layout draft, bundle wireframes into a browsable viewer page, or publish wireframes for review.
cli-review
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simplify
Simplifies code for clarity without changing behavior. Use for readability, maintainability, and complexity reduction after behavior is understood.
loop-engineering
Loop engineering runtime Grill + Monitor
verification-planning
Verification planning for non-trivial coding work. Use before implementing a feature, bug fix, refactor, cross-system change, or high-confidence behavior change that needs a credible project-specific evidence path.
release-smoke-test
Test an oh-my-opencode-slim release candidate or bugfix before publishing. Use when validating a packed plugin artifact, release branch, crash fix, OpenCode runtime compatibility, or model-specific smoke test such as OpenCode 1.17.11 message transform regressions.
codemap
Generate comprehensive hierarchical codemaps for UNFAMILIAR repositories. Expensive operation - only use when explicitly asked for codebase documentation or initial repository mapping
clonedeps
Clone important project dependency source code into an ignored local workspace so OpenCode can inspect library internals. Use when the user asks to clone dependencies, inspect dependency/source internals, understand SDK/framework behavior from source, debug library implementation details, or make core dependency repos locally readable. Do not use for ordinary API/docs questions where @librarian is enough.
oh-my-opencode-slim
Configure and improve oh-my-opencode-slim for the current user. Use when users want to tune agents, models, prompts, custom agents, skills, MCPs, presets, or plugin behavior. Also use when recurring workflow friction suggests a safe config or prompt improvement.
reflect
Review recent work, find repeated workflow patterns, and suggest reusable skills, agents, commands, config changes, or playbooks. Use when the user asks to learn from past sessions, improve recurring workflows, or identify what should be turned into reusable agent instructions.
deepwork
High-cost orchestrator workflow for large, high-risk, multi-phase coding efforts with meaningful dependencies and review gates. Do not activate for routine multi-file changes.
worktrees
Manage Git worktrees as OMO safe isolated coding lanes for complex, risky, or parallel work.
translate-pdf
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