---ci---
project: acdl
phase: 2
milestone: v1.28
status: execute
persona: backend-engineer
---
Extract dispatch_action() shared business-logic dispatch + _to_http_response
error mapper. lambda_handler (Lambda) + cli_main (CLI) become thin input
parsers that both delegate to dispatch_action. The action routing, contract
validation, DynamoDB write, error reporting live in shared functions — single
source of truth (NFR-7). tests/test_dual_use.py verifies both paths produce
the same output for the same input, both call dispatch_action, and code
share >=80% (CAP-026). 41 existing ingestor tests still pass.
Jon Chery