agentic-ai-engineering/skills/kits/verifier-pro/SKILL.md

Verifier Pro Kit

Catch agent mistakes before they hit production. Read-only verification.

Included Skills

1. Verifier Builder — Two-agent observer pattern
2. Confidence Ladder — PERFECT → FAILED grading
3. Claim Decomposition — Break every claim into atomic units
4. Read-Only Surface — Restrict to read/grep/find/ls
5. Escalation Handler — Max 3 loops, then human

Architecture

Builder (your terminal) ──unix socket──► Verifier (new window, input LOCKED)
        │                                          │
        ▼ writes:                                  ▼ reads (read-only):
  session.jsonl                              session.jsonl
        │                                          │
        ◄──── verifier_prompt (corrective feedback) ──┘

The Confidence Ladder

Level	Meaning	Bar Color
PERFECT	Every claim verified, zero gaps	Green
VERIFIED	All checks passed, minor gaps	Green
PARTIAL	No failures, significant unverifiable gaps	Orange
FEEDBACK	Claims failed, correction sent	Orange
FAILED	Cannot verify, escalating to human	Red

Key Properties

• Builder DOES NOT KNOW verifier exists (pure observer)
• Verifier input is LOCKED (structurally un-promptable)
• Verifier has NO write tools (enforced at tool surface level)
• Max 3 correction loops, then escalate to human

Usage

# Start both agents
just verifier

# Builder prompts normally
# Verifier auto-runs after each builder turn
# If verification fails → corrective feedback sent
# After 3 failures → escalates to you