Validate Contract

Validate Contract

Static, reasoning-based review of each collection client against the UNS data contract in CLAUDE.md. This is a judgment task, not a script — read the client code and the contract, then report violations with file paths, line numbers, and required fixes.

Usage

• /validate-contract — review all three clients
• /validate-contract modbus — review the Modbus client only

Checklist

For each client, check every rule from CLAUDE.md:

Naming

• All tag names are snake_case (no hyphens, no camelCase, no uppercase)
• All tag names exist in contracts/tag_database.csv (column tag_name)
• No aliases, abbreviations, or "friendly names"
• Source identifiers resolve to contract tags via the client's map file (register_map.csv / opcua_node_map.csv / mqtt_topic_map.csv)

Timestamps

• Values written to tag_history.ts are timezone-aware UTC
• Naive timestamp sources convert using source_timezone from config/{client}.yaml and log: "Naive timestamp from {source}, assuming {timezone}"
• Clients that stamp at read time document the clock source
• No client silently assumes UTC for a naive timestamp

Write Target

• Readings are validated with validate_reading() before writing
• Writes go through DBWriter — no hand-rolled connections or SQL
• tag_id is resolved from uns_namespace; unresolved tags go to dead_letter
• Value types are consistent with the tag's metric_type (Int32, Float, Boolean)
• Quality flags are GOOD, BAD, or STALE — no other values

Shared Code

• Clients import Reading from shared.models — never redefine it
• No duplicate validation or DB-write logic inside client code

Tests

• Each client has unit tests
• Tests mock the protocol client (no live server required)
• Tests verify contract compliance via validate_reading()

Report Format

For each client:

## {client_name} — {PASS | FAIL}

Violations:
- {file}:{line} — {rule violated} — {what's wrong} — Fix: {what to change}

Notes:
- {observations about edge cases or fragility}

If a client passes all checks, say PASS and move on. Do not pad the report.