Bounded underwriting agent skills

UW Markdown ships five starter workflow skills as local agent configuration files. Each returns structured EditOperation proposals for a host to validate and apply. No skill performs financial math. A producer uses its own deterministic modeling tools; a receiver can verify stated results with @uwmd/verify independently of that producer.

These optional starter skills are separate from the format instructions on the AI guide, and no conforming implementation needs them.

Skill	Job boundary
uwmd-intake-scope	intake facts, scope, and missing-input triage
uwmd-document-extraction	attributable source-document extraction
uwmd-validation-triage	evidence-backed validation remediation
uwmd-batch-exceptions	collection-index exception triage
uwmd-portfolio-rollup	relationship-aware portfolio review

All skills preserve provenance, never write directly, and return [] when no safe edit is supported.