Foundational infrastructure gem providing configuration cascade resolution, environment variable handling, and shared utilities for all ace-* gems. Library-only gem following ace-support-* pattern for infrastructure components.

Integrates with models.dev API to provide model validation, cost tracking, and change monitoring for 40+ LLM providers. Validate model names, calculate query costs, and track pricing changes.

ace-support-nav provides unified navigation and path resolution across the ACE ecosystem. It automatically discovers handbooks bundled within ace-* gems, resolves resource URIs to actual file paths, and supports a multi-level override cascade.

Behavioral spec-based task management with compact IDs, subtask trees, AI-powered implementation plans, and automated health checks. Same CLI for developers and coding agents.

Wraps Minitest with smart grouping, cross-package resolution, and persistent reports so developers and coding agents can run focused checks, diagnose failures with context, and retain searchable execution history.

Runs package E2E scenarios through agents with reproducible setup, sandbox isolation, and structured reports for reliable validation workflows.

Start tmux sessions from presets and add windows on the fly without restarting. Compose pane, window, and session presets with deep-merge overrides across the ACE config cascade.