Why

Portability (required)

This skill is part of the portable pstack pack.

Read the pstack capability contract and the adapter for the active coding agent before delegation.
Discover evidence through the tools, connectors, resources, and local repository access actually available in the current host. Do not assume a specific MCP registry, filesystem path, or vendor tool name.
Use parallel with read-only explore helpers for independent evidence categories. Use the lead agent or a read-only review helper for synthesis.
Resolve investigators through model_role:fast_explore and synthesis through model_role:judgment. Never require a vendor-specific model identifier.
When a category or helper capability is unavailable, record the gap and continue. Do not invent access or silently replace missing historical evidence with code-shape speculation.

Investigate the motivation and intent behind code or a product decision: