Harden PetVault skill architecture and report artifact pipelineFix/structure and report sanitizer

[Kingslayer-bot]

Summary

This PR hardens the PetVault skill architecture and report artifact pipeline after final release validation.

Key changes

• Added .agents/, AGENTS.md, eval cases, examples, and release validation docs.

• Unified forbidden-term registry and report sanitizer to prevent internal leakage.

• Extracted deterministic modules:

  • billing_ops.py
  • material_ops.py
  • latex_ops.py
  • manifest_ops.py
  • pdf_ops.py
  • bill_render_ops.py
  • agent_registry_loader.py

• Added reconstructed bill sections instead of raw invoice image embedding.

• Added golden text snapshots and report artifact tests.

• Added six synthetic user-flow examples:

  • bill_explain
  • knowledge_query
  • emergency_guardrail
  • insurance_boundary
  • travel_care
  • product_fit

• Updated:

  • SKILL.md
  • AGENTS.md
  • docs
  • CI workflow
  • CHANGELOG

Final Validation

Final release verdict: GO.

Validation rounds:

• Round 1: 10 validation cases prepared; baseline tests passed.
• Round 2: Agent A user-side validation score 4.75/5; Agent B developer validation passed.
• Round 3: A/B integrated validation agreement rate 100%.
• Round 4: final regression, git hygiene, and GitHub push passed.

Test Result

Command:

python -m unittest discover -s pet-vault-skill/tests -p "test_*.py" -v