---
id: ADAPTIVE-WP-0004
type: workplan
title: "Boundary engine and explainable validation"
domain: financials
repo: adaptive-pricing
status: finished
owner: codex
topic_slug: helix-forge
created: "2026-07-02"
updated: "2026-07-02"
state_hub_workstream_id: "3ab759a2-97b6-4cf0-8c14-80dae637c23a"
---

# Boundary engine and explainable validation

Turn strategic pricing constraints from `INTENT.md` into an explicit validation
engine with inspectable outcomes.

## Formalize Constraint Model

```task
id: ADAPTIVE-WP-0004-T01
status: done
priority: high
state_hub_task_id: "180ea896-4e89-4256-b1ba-0d72e4d49dcd"
```

Define the internal representation for hard and soft constraints, including
minimum margin, cost floor, payment fees, commitment requirements, segment
eligibility, and approval thresholds.

## Implement Validation Engine

```task
id: ADAPTIVE-WP-0004-T02
status: done
priority: high
state_hub_task_id: "16c96dc5-45fc-4cca-9f71-d3b8d797f28f"
```

Implement evaluation logic that accepts a pricing configuration and returns
pass/fail results, violated constraints, and structured reasons.

## Model Commitment-Backed Discounts

```task
id: ADAPTIVE-WP-0004-T03
status: done
priority: high
state_hub_task_id: "adaa7751-b1b9-4d9e-a708-4caaf6a4801d"
```

Encode rules for discounts, concessions, and improved unit economics so they
require enforceable or economically meaningful commitments instead of optimistic
usage assumptions.

## Add Scenario And Abuse Tests

```task
id: ADAPTIVE-WP-0004-T04
status: done
priority: medium
state_hub_task_id: "96a1f2d4-518f-4e4f-8227-43bac08ff615"
```

Add scenario tests that cover valid configurations, invalid discounting,
rejected commitment trades, and edge cases such as zero-usage, high-fee, or
unprofitable configurations.

## Exit Criteria

```task
id: ADAPTIVE-WP-0004-T05
status: done
priority: medium
state_hub_task_id: "0a771125-cc2b-4339-b210-ac834562516f"
```

Exit when pricing configurations can be validated against explicit constraints
with machine-readable and human-readable explanations.

Dependencies: `ADAPTIVE-WP-0003`.