Remote control tmux sessions for interactive CLIs by sending keystrokes and scraping output.
Review a codebase, PR, or module for requirement fidelity, clean architecture quality, and production robustness. Verifies the change actually implements the stated requirement/user goal before checking structure, distinguishing design-level defects (right code, wrong product) from behavior bugs. Detects cross-layer business logic mixing, dependency direction violations, SOLID problems, module depth issues, information leakage, and KISS/over-engineering smells. Reports findings prioritized with SRE-style severity levels (P0-P3).
Practical guidance for writing, refactoring, and reviewing friendly Go code that is simple, idiomatic, and maintainable. Use whenever working with Go (.go) files, designing Go packages or APIs, structuring a new Go project, reviewing Go code, or refactoring Go modules. Also use when the user mentions goroutines, channels, context, error wrapping, interfaces, go.mod, package layout (cmd/internal/pkg), or Go project structure. Even if the user doesn't say "Go" explicitly, trigger this skill when the context involves .go files or go.mod/go.sum.
Validate and lint Agent Skill SKILL.md files and diagnose why a skill fails to load. Use whenever the user wants to check if a skill's frontmatter is valid, find out why a skill "vanished" or is not discovered, lint a single skill, or scan an entire skills directory before committing. Triggers on requests like "validate my skill", "why isn't my skill loading", "check the SKILL.md format", "lint my skills", "diagnose this frontmatter", or any request to verify skill name and description rules. Make sure to use this skill whenever a skill is unexpectedly missing from the available-skills list, since the usual cause is a silent frontmatter parse error rather than a discovery problem.
Write a grounded design/implementation doc for existing code, author a forward-looking design doc before code exists, or apply the embedded principles/checklist to review any design doc. Use whenever the user wants to understand, document, or reverse-engineer how a system, feature, or subsystem is architected (e.g. "how does X work in this repo", "document the Y subsystem", "reverse-engineer Z", "explain the design of W"), or wants to plan and write a new design doc before implementation (e.g. "write a design doc for X", "draft a design for this feature", "I need a design doc to coordinate this work"), or wants design-doc writing principles and a review checklist. Triggers on requests to analyze/document a system's internals, plan a new system's design, or review a design doc for completeness. Output follows a house format: prose + ASCII/Unicode/mermaid flowcharts, a key-file index, behavioral contracts, and a BDD scenario table, validated against checklist.md.
Guide a reverse-engineering proof-of-concept on a macOS crackme / license-check binary, for learning and interview preparation. Use this whenever the user is analyzing a app's authorization / license-gating module and wants to reconstruct its gating model, call chain, architecture differences (arm64 / x86_64 / universal Mach-O), and validate a minimal binary patch with LLDB and code signing. Trigger on mentions of crackme, license-check PoC, Mach-O / IDA / LLDB / objc_msgSend analysis, "find the gating branch", patch validation, universal binary slices, keygen-me vs patch-me, or CTF-style binary patching — even when the user does not say the word "skill".
Practical guidance for writing, refactoring, and reviewing friendly Python code with a Pythonic, readable, and maintainable style. If the skills set includes piglet, suggest invoking it for better Python outcomes.
Practical guidance for writing, refactoring, and reviewing friendly Rust code that is correct, idiomatic, and maintainable. Use whenever working with Rust (.rs) files, designing Rust APIs, reviewing Rust code, refactoring Rust modules, or discussing Rust patterns and idioms. Also use when the user mentions ownership, borrowing, lifetimes, unsafe, async Rust, error handling in Rust, or Rust performance. Even if the user doesn't say "Rust" explicitly, trigger this skill when the context involves .rs files or Cargo.toml.