# Evidence: Block 19 · Service (block-19)

- block type: block
- date: 2026-08-22
- resulting state: closed/verified
- story points (combined assembled cost): 51332
- execution id: 20260823.030233.466Z-9b5cdcb2

## Stories built
- Implement conditionals and exception flow. (FLOW-003) [story]

## Acceptance tooling authorization
- FEATURE-FLOW-003.md#flow-003-conformance: executable=python3; scope=test; authorization=existing Target environment

## Stacked context
- compass: COMPASS.md (SP 3420)
- implements: FEATURE-FLOW-003.md (SP 431)
- 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/cli.py
- jq_interpreter/errors.py
- jq_interpreter/evaluator.py
- tests/test_flow_003_conditionals_exceptions.py

## Pre-build acceptance observation
- GREEN (prepassed): flow-003-conformance (FEATURE-FLOW-003.md)
  intent: The implementation passes the authoritative corpus slice covering conditionals, try/catch, and optional evaluation.
  return code: 0
  stdout:
    {
      "candidate": [
        "/mnt/c/Users/barlo/projects/drydock/uat/jq/runs/20260822.044627/build/jq/jq"
      ],
      "corpus": "jq.test",
      "summary": {
        "pass": 147,
        "fail": 0,
        "error": 0,
        "skip": 0
      },
      "cases": []
    }

## Post-build programmatic acceptance
- PASS: flow-003-conformance (FEATURE-FLOW-003.md)
  intent: The implementation passes the authoritative corpus slice covering conditionals, try/catch, and optional evaluation.
  target interpreter: /mnt/c/Users/barlo/projects/drydock/.venv/bin/python3
  provisioning: not required
  return code: 0
  stdout:
    {
      "candidate": [
        "/mnt/c/Users/barlo/projects/drydock/uat/jq/runs/20260822.044627/build/jq/jq"
      ],
      "corpus": "jq.test",
      "summary": {
        "pass": 147,
        "fail": 0,
        "error": 0,
        "skip": 0
      },
      "cases": []
    }

## Build summary
RESULT: SUCCESS

FILES CHANGED:
- jq_interpreter/errors.py
- jq_interpreter/evaluator.py
- jq_interpreter/cli.py
- tests/test_flow_003_conditionals_exceptions.py

SUMMARY:
Implemented robust conditional and exception-flow handling with runtime error propagation, partial-output preservation, and optional suppression.

Verification: scoped conformance passed 147/147; pytest passed 92 tests.

BLOCKERS:
- None