# Evidence: Block 4 · Service (block-4)

- block type: block
- date: 2026-08-22
- resulting state: closed/verified
- story points (combined assembled cost): 24282
- execution id: 20260822.195122.332Z-1d5baaf1

## Stories built
- Implement JSON input and compact output handling. (EXEC-003) [story]

## Stacked context
- compass: COMPASS.md (SP 3420)
- implements: FEATURE-EXEC-003.md (SP 537)
- context: run_conformance.py (SP 4354)
- context: jq.test (SP 13058)
- context: ARCHITECTURE_compact.md (SP 154)
- stack: python_compact.md (SP 1534)
- stack: common_compact.md (SP 1179)

## Build directory changes
- jq_interpreter/ast.py
- jq_interpreter/cli.py
- jq_interpreter/evaluator.py
- jq_interpreter/interpreter.py
- jq_interpreter/parser.py
- tests/test_json_io.py

## Pre-build acceptance observation
- GREEN (prepassed): multiple-input-values (FEATURE-EXEC-003.md)
  intent: Multiple JSON input values are processed in order and emitted one per line.
  return code: 0
- RED: generator-line-output (FEATURE-EXEC-003.md)
  intent: Multiple outputs generated from one input preserve order and multiplicity.
  return code: 1
  stderr:
    --- drydock: values at failure ---
      result = CompletedProcess(args=['./jq', '-c', '.[]'], returncode=3, stdout='', stderr='jq: compile error: unsupported program in foundational parser\n')
    --- drydock: end values ---
    Traceback (most recent call last):
      File "generator-line-output.py", line 11, in <module>
        assert result.returncode == 0
               ^^^^^^^^^^^^^^^^^^^^^^
    AssertionError
- GREEN (prepassed): compact-json-output (FEATURE-EXEC-003.md)
  intent: Generated objects are serialized as single-line JSON values.
  return code: 0

## Post-build programmatic acceptance
- PASS: multiple-input-values (FEATURE-EXEC-003.md)
  intent: Multiple JSON input values are processed in order and emitted one per line.
  target interpreter: /mnt/c/Users/barlo/projects/drydock/.venv/bin/python3
  provisioning: not required
  return code: 0
- PASS: generator-line-output (FEATURE-EXEC-003.md)
  intent: Multiple outputs generated from one input preserve order and multiplicity.
  target interpreter: /mnt/c/Users/barlo/projects/drydock/.venv/bin/python3
  provisioning: not required
  return code: 0
- PASS: compact-json-output (FEATURE-EXEC-003.md)
  intent: Generated objects are serialized as single-line JSON values.
  target interpreter: /mnt/c/Users/barlo/projects/drydock/.venv/bin/python3
  provisioning: not required
  return code: 0

## Build summary
RESULT: SUCCESS

FILES CHANGED:
- jq_interpreter/interpreter.py
- jq_interpreter/cli.py
- jq_interpreter/ast.py
- jq_interpreter/parser.py
- jq_interpreter/evaluator.py
- tests/test_json_io.py

SUMMARY:
Implemented whitespace-separated JSON stream input, compact ordered JSON output, and `.[]` generator support. All 20 tests and declared acceptance checks pass.

BLOCKERS:
- None