CLI tool design, argument parsing, interactive prompts, shell completions, cross-platform considerations, and distribution strategies.

Comprehensive protocol for validating root causes of software issues. Use when you need to systematically debug a complex bug, flaky test, or unknown system behavior by forming hypotheses and validating them with specific tasks.

Pre-flight checklist and post-implementation self-review protocol. Use before generating any code (pre-flight) and after writing code but before verification (self-review) to catch issues early.

ML pipeline design, feature engineering, model training/serving, experiment tracking, model validation, and MLOps principles.

Safe, sequential merge protocol for integrating N parallel worktree branches back into main. Defines merge ordering, quality gates between merges, conflict classification, and the updated worktree naming convention for multi-instance dispatches.

Enforces MECE file boundaries for parallel write-agents. Validates that no two writers share file access. Manages the contracts layer (shared reads) and integration sub-task patterns. The safety invariant that prevents merge chaos.

Profile-driven performance optimization protocol. Use when profiling data (CPU, heap, trace) is available or when the user requests performance analysis. Covers methodology, pattern catalog, safety invariants, and when-to-stop heuristics. Language-specific tooling is in languages/*.md.

Performs dynamic, reflective problem-solving through iterative thought chains. Use for complex planning requiring revision, branching, backtracking, or hypothesis verification. Ideal for multi-step analysis where context maintenance is required or the full scope isn't initially clear.