# Jartan-LLC > Open-source publisher. Listings imported from github.com/Jartan-LLC — credited to the original author with their license. - **Listings:** 40 - **Total installs:** 0 - **Profile:** https://agentstack.voostack.com/s/jartan-llc - **Website:** https://github.com/Jartan-LLC ## Published listings - [Code Structure](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-code-structure) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-code-structure` Language-agnostic structural craft -- decompose on responsibility not size, prefer deep modules over shallow piles, and shape cohesion, coupling, interfaces, error contracts, and data invariants. Sibling to code-hygiene, comment-hygiene and readable-code. - [Create Issue](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-create-issue) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-create-issue` Create a GitHub issue using the appropriate template - [Python Resilience](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-python-resilience) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-python-resilience` Python resilience patterns including automatic retries, exponential backoff, timeouts, and fault-tolerant decorators. - [Python Type Safety](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-python-type-safety) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-python-type-safety` Python type safety with type hints, generics, protocols, and strict type checking. - [Review Pr](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-review-pr) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-review-pr` Review a pull request using specialized reviewer agents - [Uv Package Manager](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-uv-package-manager) — Skill · Free — `agentstack add skill-jartan-llc-grimoire-uv-package-manager` The uv package manager for fast Python dependency management, virtual environments, and modern project workflows. - [Github Conventions](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-github-conventions) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-github-conventions` GitHub conventions -- branch naming, commit format, issue/PR templates, and safe issue/PR referencing in comments. - [Python Api Docs](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-python-api-docs) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-python-api-docs` Render Python docstrings into a browsable, published API reference with Sphinx, autodoc, napoleon, and MyST. - [Pydantic](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-pydantic) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-pydantic` Python data validation using type hints and runtime type checking with Pydantic v2's Rust-powered core. - [Claude Config](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-claude-config) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-claude-config` How agents, skills, and commands work in Claude Code projects. - [Address Review](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-address-review) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-address-review` Work through review findings on a PR one at a time - [Recursive Planning](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-recursive-planning) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-recursive-planning` How to decompose projects into wave plans -- module identification, dependency mapping, wave assignment, contract guidance, deliverables. - [Python Performance Optimization](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-python-performance-optimization) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-python-performance-optimization` Profile and optimize Python code using cProfile, memory profilers, and performance best practices. - [Python Configuration](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-python-configuration) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-python-configuration` Python configuration management via environment variables and typed settings. - [Code Hygiene](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-code-hygiene) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-code-hygiene` Language-agnostic code hygiene -- no dead/reinvented/duplicated code, truthful names, real implementations, and scoped (never blanket) diagnostic suppressions. - [Recursive Development](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-recursive-development) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-recursive-development` Core principles for recursive multi-agent development -- nesting, scope ownership, TDD, context flow, token economics. - [Testing Patterns](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-testing-patterns) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-testing-patterns` Integration test philosophy -- test observable behavior, fixture composition, canary markers for library internals. - [Plan Issue](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-plan-issue) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-plan-issue` Analyze a GitHub issue and create an implementation plan - [Python Patterns](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-python-patterns) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-python-patterns` Pythonic idioms, PEP 8 standards, type hints, and best practices for building robust, efficient, and maintainable Python applications. - [Python Error Handling](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-python-error-handling) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-python-error-handling` Python error handling patterns including input validation, exception hierarchies, and partial failure handling. - [Readable Code](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-readable-code) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-readable-code` Language-agnostic local-clarity craft -- shape control flow, the naming of a whole set, and reading order so a body reads straight down with the smallest working set. Sibling to code-hygiene, comment-hygiene and code-structure. - [Api Error Patterns](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-api-error-patterns) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-api-error-patterns` API error response format -- machine-readable codes, human-readable reasons, status code rules. - [Recursive Execution](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-recursive-execution) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-recursive-execution` Wave execution rules -- agent constraints, wave barriers, review-fix evaluation, language awareness. - [Python Project Structure](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-python-project-structure) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-python-project-structure` Python project organization, module architecture, and public API design. - [Frontend Patterns](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-frontend-patterns) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-frontend-patterns` CSS design system principles -- token usage, semantic layering, mobile-first, component isolation. - [Python Code Style](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-python-code-style) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-python-code-style` Python code style, linting, formatting, naming conventions, and documentation standards. - [Async Python Patterns](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-async-python-patterns) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-async-python-patterns` Python asyncio, concurrent programming, and async/await patterns for high-performance applications. - [Logging Patterns](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-logging-patterns) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-logging-patterns` Logging conventions -- level usage, formatting style, structured output. - [Recursive Quality](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-recursive-quality) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-recursive-quality` Quality patterns, anti-patterns, and contract richness guidelines for recursive development. - [Python Anti Patterns](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-python-anti-patterns) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-python-anti-patterns` Common Python anti-patterns and a pre-merge review checklist. - [Implement Issue](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-implement-issue) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-implement-issue` Implement a GitHub issue, optionally from an existing plan - [Python Testing](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-python-testing) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-python-testing` Python testing strategies using pytest, TDD methodology, fixtures, mocking, parametrization, and coverage requirements. - [Docs Patterns](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-docs-patterns) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-docs-patterns` Documentation writing conventions -- style, structure, tone, and quality standards. - [Python Observability](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-python-observability) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-python-observability` Python observability patterns including structured logging, metrics, and distributed tracing. - [Comment Hygiene](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-comment-hygiene) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-comment-hygiene` Comment truthfulness -- what a comment must tell the reader that the code can't, the KEEP/DELETE/EXEMPT/CONDITIONAL taxonomy, tombstone and retold-fact detection, and comment density across a diff. Sibling to code-hygiene, code-structure and readable-code. - [Review Severity](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-review-severity) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-review-severity` One severity model for code review -- Critical/Important/Minor by consequence-if-shipped (impact x reachability), with confidence as a separate report gate. - [Create Pr](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-create-pr) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-create-pr` Create a pull request for implemented changes from a GitHub issue - [Python Packaging](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-python-packaging) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-python-packaging` Create distributable Python packages with proper project structure, pyproject.toml, and publishing to PyPI. - [Python Resource Management](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-python-resource-management) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-python-resource-management` Python resource management with context managers, cleanup patterns, and streaming. - [Recursive Implement](https://agentstack.voostack.com/l/skill-jartan-llc-grimoire-recursive-implement) — Skill · Free · security-reviewed — `agentstack add skill-jartan-llc-grimoire-recursive-implement` Build a project using recursive multi-agent development with TDD --- Seller on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Install any with `agentstack add `.