# Evidence: Block 10 · Service (block-10)

- block type: block
- date: 2026-08-22
- resulting state: closed/verified
- story points (combined assembled cost): 51313
- execution id: 20260823.022052.850Z-bef4ad90

## Stories built
- Implement composition and Cartesian generator evaluation. (CORE-002) [story]

## Acceptance tooling authorization
- FEATURE-CORE-002.md#core-002-conformance: executable=python3; scope=test; authorization=existing Target environment

## Stacked context
- compass: COMPASS.md (SP 3420)
- implements: FEATURE-CORE-002.md (SP 412)
- context: jq-manual.txt (SP 32696)
- context: jq.test (SP 13058)
- context: ARCHITECTURE_compact.md (SP 154)
- stack: python_compact.md (SP 1534)

## Build directory changes
- jq_interpreter/evaluator.py
- tests/test_core_002_composition.py

## Pre-build acceptance observation
- GREEN (prepassed): core-002-conformance (FEATURE-CORE-002.md)
  intent: The executable evaluates pipes, commas, arrays, objects, and composed operators.
  return code: 0

## Post-build programmatic acceptance
- PASS: core-002-conformance (FEATURE-CORE-002.md)
  intent: The executable evaluates pipes, commas, arrays, objects, and composed operators.
  target interpreter: /mnt/c/Users/barlo/projects/drydock/.venv/bin/python3
  provisioning: not required
  return code: 0

## Build summary
Implemented CORE-002 composition and Cartesian evaluation support.

RESULT: SUCCESS

FILES CHANGED:
- [jq_interpreter/evaluator.py](/mnt/c/Users/barlo/projects/drydock/uat/jq/runs/20260822.044627/build/jq/jq_interpreter/evaluator.py)
- [tests/test_core_002_composition.py](/mnt/c/Users/barlo/projects/drydock/uat/jq/runs/20260822.044627/build/jq/tests/test_core_002_composition.py)

SUMMARY:
Centralized ordered Cartesian argument evaluation and added composition regression tests. All 45 tests and the scoped conformance slice pass.

BLOCKERS:
- None