Geoff Johnson

Debugging and troubleshooting Tokio applications using tokio-console, detecting deadlocks, memory leaks, and performance issues. Use when diagnosing async runtime problems.

Common Tokio patterns and idioms for async programming. Use when implementing worker pools, request-response patterns, pub/sub, timeouts, retries, or graceful shutdown.

Network programming patterns with Hyper, Tonic, and Tower. Use when building HTTP services, gRPC applications, implementing middleware, connection pooling, or health checks.

Advanced concurrency patterns for Tokio including fan-out/fan-in, pipeline processing, rate limiting, and coordinated shutdown. Use when building high-concurrency async systems.

Security best practices for Sinatra applications including input validation, CSRF protection, and authentication patterns. Use when hardening applications or conducting security reviews.

Common Sinatra patterns, routing strategies, error handling, and application organization. Use when building Sinatra applications or designing routes.

Architecture patterns for Rust UI applications including GPUI-specific patterns, code organization, modularity, and scalability. Use when user needs guidance on application architecture, code organization, or scaling UI applications.

Modern Ruby idioms, design patterns, metaprogramming techniques, and best practices. Use when writing Ruby code or refactoring for clarity.

Rack middleware development, configuration, and integration patterns. Use when working with middleware stacks or creating custom middleware.

Updates the .claude-plugin/marketplace.json file when plugins are added, modified, or removed. Use when creating or updating plugin entries in the marketplace catalog.

GPUI styling system including theme design, responsive layouts, visual design patterns, and style composition. Use when user needs help with styling, theming, or visual design in GPUI.

Performance optimization techniques for GPUI including rendering optimization, layout performance, memory management, and profiling strategies. Use when user needs to optimize GPUI application performance or debug performance issues.

Common GPUI patterns including component composition, state management strategies, event handling, and action dispatching. Use when user needs guidance on GPUI patterns, component design, or state management approaches.

Modern Go patterns, idioms, and best practices from Go 1.18+. Use when user needs guidance on idiomatic Go code, design patterns, or modern Go features like generics and workspaces.

Performance optimization techniques including profiling, memory management, benchmarking, and runtime tuning. Use when optimizing Go code performance, reducing memory usage, or analyzing bottlenecks.

Advanced concurrency patterns with goroutines, channels, context, and synchronization primitives. Use when working with concurrent Go code, implementing parallel processing, or debugging race conditions.

Git troubleshooting techniques including recovering lost commits, fixing merge conflicts, resolving detached HEAD, and diagnosing repository issues. Use when user encounters git errors or needs to recover from mistakes.

Repository management strategies including branch strategies (Git Flow, GitHub Flow, trunk-based), monorepo patterns, submodules, and repository organization. Use when user needs guidance on repository structure or branching strategies.

Git conventions and workflow best practices including Conventional Commits, branch naming, and commit message guidelines. Use when user needs guidance on git standards, commit formats, or workflow patterns.

Advanced git operations including complex rebase strategies, interactive staging, commit surgery, and history manipulation. Use when user needs to perform complex git operations like rewriting history or advanced merging.

Regenerates documentation files (agents.md, agent-skills.md, plugins.md, usage.md) from marketplace data using Jinja templates. Use when plugins are added, updated, or removed to keep documentation in sync.

CLI user experience best practices for error messages, colors, progress indicators, and output formatting. Use when improving CLI usability and user experience.

Distribution and packaging patterns including shell completions, man pages, cross-compilation, and release automation. Use when preparing CLI tools for distribution.

Configuration management patterns including file formats, precedence, environment variables, and XDG directories. Use when implementing configuration systems for CLI applications.

Common Clap patterns and idioms for argument parsing, validation, and CLI design. Use when implementing CLI arguments with Clap v4+.