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{"type":"item.completed","item":{"id":"item_0","type":"agent_message","text":"=== BEGIN ARTIFACT FEATURE-Function-Definitions.md ===\n# FEATURE: Function Definitions\n\n| Field | Value |\n|-------------|-------|\n| Version | 20260822 V1 |\n| Description | Provides jq function definitions, lexical scope, redefinition, and recursion. |\n| Depends On | FEATURE-Function-Parameters.md |\n| Provides | def, function redefinition, recursion, forward and self references |\n| Consumes | function parameter evaluation |\n\n## Workflow\n\nThe interpreter compiles `def` declarations into lexically scoped callable definitions. Definitions support recursive self-reference, arity-specific redefinition, forward references permitted by jq semantics, and closure behavior across nested definitions.\n\n## Programmatic Acceptance\n\n=== AC function-definitions-scoped ===\nIntent: Function-definition behavior is implemented and callable.\n\nimport json\nimport subprocess\n\nresult = subprocess.run(\n [\"./jq\", \"-c\", \"def inc: . + 1; inc\"],\n input=\"2\\n\",\n capture_output=True,\n text=True,\n)\nassert result.returncode == 0\nassert json.loads(result.stdout) == 3\n\n=== END AC function-definitions-scoped ===\n\n=== AC function-recursion-scoped ===\nIntent: Recursive user-function behavior is implemented and terminates correctly.\n\nimport json\nimport subprocess\n\nresult = subprocess.run(\n [\"./jq\", \"-c\", \"def fact: if . <= 1 then 1 else . * ((. - 1) | fact) end; fact\"],\n input=\"5\\n\",\n capture_output=True,\n text=True,\n)\nassert result.returncode == 0\nassert json.loads(result.stdout) == 120\n\n=== END AC function-recursion-scoped ===\n\n## User Acceptance\n\n- None.\n\n## Guardrails\n\n- Function identity includes name and arity.\n- Redefinition must affect only references permitted by jq lexical scope.\n- Recursive calls must terminate or propagate runtime errors according to the filter semantics.\n=== END ARTIFACT ===\n\n=== BEGIN ARTIFACT FEATURE-Function-Parameters.md ===\n# FEATURE: Function Parameters\n\n| Field | Value |\n|-------------|-------|\n| Version | 20260822 V1 |\n| Description | Provides jq filter and value function parameter evaluation. |\n| Depends On | FEATURE-Variable-Bindings.md |\n| Provides | filter parameters, value parameters, multiple arities, Cartesian arguments |\n| Consumes | lexical variable bindings |\n\n## Workflow\n\nUser-defined functions accept filter parameters and value parameters with jq arity rules. Filter arguments remain executable generators, value arguments are evaluated and bound, and multiple argument streams produce the required cartesian combinations.\n\n## Programmatic Acceptance\n\n=== AC function-parameters-scoped ===\nIntent: Function-parameter behavior is implemented for filter arguments.\n\nimport json\nimport subprocess\n\nresult = subprocess.run(\n [\"./jq\", \"-c\", \"def twice(f): f | f; twice(. + 1)\"],\n input=\"1\\n\",\n capture_output=True,\n text=True,\n)\nassert result.returncode == 0\nassert json.loads(result.stdout) == 3\n\n=== END AC function-parameters-scoped ===\n\n=== AC cartesian-function-scoped ===\nIntent: Multiple generator-valued arguments produce Cartesian combinations.\n\nimport json\nimport subprocess\n\nresult = subprocess.run(\n [\"./jq\", \"-c\", \"def pair(a; b): [a, b]; pair(.[0, 1]; .[1, 2])\"],\n input=\"[10, 20, 30]\\n\",\n capture_output=True,\n text=True,\n)\nvalues = [json.loads(line) for line in result.stdout.splitlines()]\nassert result.returncode == 0\nassert values == [[10, 20], [10, 30], [20, 20], [20, 30]]\n\n=== END AC cartesian-function-scoped ===\n\n## User Acceptance\n\n- None.\n\n## Guardrails\n\n- Distinguish filter parameters from value parameters.\n- Preserve argument stream ordering and cartesian multiplicity.\n- Resolve parameters according to lexical scope and declared arity.\n=== END ARTIFACT ===\n\n=== BEGIN ARTIFACT FEATURE-Generator-Core.md ===\n# FEATURE: Generator Core\n\n| Field | Value |\n|-------------|-------|\n| Version | 20260822 V1 |\n| Description | Evaluate jq filters as ordered streams of zero or more values. |\n| Depends On | FEATURE-Declaration-Parser.md |\n| Provides | ordered generator evaluation, empty, iteration, range |\n| Consumes | AST for filter expressions |\n\nEvery filter shall evaluate against an input value as an ordered generator. The evaluator shall preserve zero, one, and multiple outputs, backtracking, identity, array/object iteration, recursive descent support, `range`, and `empty`. Output order and multiplicity are semantic requirements.\n\n## Programmatic Acceptance\n\n=== AC core-001-generators ===\nIntent: Identity, iteration, empty, and range generator behavior is implemented.\n\nimport json\nimport subprocess\n\nresult = subprocess.run(\n [\"./jq\", \"-c\", \"[., range(2)]\"],\n input=\"7\\n\",\n capture_output=True,\n text=True,\n)\nassert result.returncode == 0\nassert json.loads(result.stdout) == [7, 0, 1]\n\n=== END AC core-001-generators ===\n\n=== AC core-001-ordering ===\nIntent: Generator output order and multiplicity are preserved.\n\nimport json\nimport subprocess\n\nresult = subprocess.run(\n [\"./jq\", \"-c\", \".[] , .[]\"],\n input=\"[1, 2]\\n\",\n capture_output=True,\n text=True,\n)\nvalues = [json.loads(line) for line in result.stdout.splitlines()]\nassert result.returncode == 0\nassert values == [1, 2, 1, 2]\n\n=== END AC core-001-ordering ===\n\n## User Acceptance\n\n- None.\n\n## Guardrails\n\n- Treat generators and backtracking as the evaluation model, not an optimization.\n- Preserve partial output before a later runtime failure.\n- Do not shell out to another jq implementation.\n=== END ARTIFACT ===\n\n=== BEGIN ARTIFACT FEATURE-Index-and-Membership.md ===\n# FEATURE: Index and Membership\n\n| Field | Value |\n|-------------|-------|\n| Version | 20260822 V1 |\n| Description | Provides jq index lookup, binary search, quantifier, emptiness, and SQL-style membership utilities. |\n| Depends On | FEATURE-Object-and-Containment-Builtins.md, FEATURE-Truthiness-and-Comparison.md |\n| Provides | indices, index, rindex, bsearch, all, any, isempty, IN |\n| Consumes | collection and comparison builtins, ordered generators |\n\n## Scope\n\nThis feature implements string and array occurrence searches, insertion-point binary search, generator-aware quantifiers, emptiness checks, and SQL-style `IN` functions.\n\n## Behavior\n\n- `indices` returns all matching string or array positions.\n- `index` and `rindex` return the first and last matching positions.\n- `bsearch` returns an index or jq's negative insertion-point encoding.\n- `all` and `any` preserve short-circuit behavior over generated values.\n- `isempty` distinguishes empty streams from streams that produce values.\n- `IN` supports source and comparison generator forms.\n\n## Programmatic Acceptance\n\n=== AC data-004-conformance ===\nIntent: Index lookup and membership behavior is implemented.\n\nimport json\nimport subprocess\n\nresult = subprocess.run(\n [\"./jq\", \"-c\", \"[indices(\\\"a\\\"), index(\\\"a\\\"), rindex(\\\"a\\\")]\"],\n input=\"\\\"banana\\\"\\n\",\n capture_output=True,\n text=True,\n)\nassert result.returncode == 0\nassert json.loads(result.stdout) == [[1, 3, 5], 1, 5]\n\n=== END AC data-004-conformance ===\n\n## User Acceptance\n\n- None.\n\n## Guardrails\n\n- Preserve match positions in jq codepoint/index semantics.\n- Do not evaluate generator operands beyond required short-circuit points.\n- Do not modify files under `sources/`.\n=== END ARTIFACT ===\n\n=== BEGIN ARTIFACT FEATURE-Input-Streams.md ===\n# FEATURE: Input Streams\n\n| Field | Value |\n|-------------|-------|\n| Version | 20260822 V1 |\n| Description | Provide jq controls for consuming additional JSON input values. |\n| Depends On | FEATURE-Date-and-Time.md, FEATURE-Json-IO.md |\n| Provides | input, inputs, input_filename, input_line_number |\n| Consumes | executable JSON input boundary |\n\n## Intent\n\nImplement `input` and `inputs` over the fixed stdin interface, preserving the distinction between the initially filtered value and remaining values. Provide the available filename and line-number metadata without adding unsupported command-line options.\n\n## Programmatic Acceptance\n\n=== AC io-001-conformance ===\nIntent: The input filter consumes the next JSON value from stdin.\n\nimport json\nimport subprocess\n\nresult = subprocess.run(\n [\"./jq\", \"-c\", \"input\"],\n input=\"1\\n2\\n\",\n capture_output=True,\n text=True,\n)\nassert result.returncode == 0\nassert json.loads(result.stdout) == 2\n\n=== END AC io-001-conformance ===\n\n=== AC io-001-execution ===\nIntent: The inputs filter emits all remaining JSON values in order.\n\nimport json\nimport subprocess\n\nresult = subprocess.run(\n [\"./jq\", \"-c\", \"inputs\"],\n input=\"1\\n2\\n3\\n\",\n capture_output=True,\n text=True,\n)\nvalues = [json.loads(line) for line in result.stdout.splitlines()]\nassert result.returncode == 0\nassert values == [2, 3]\n\n=== END AC io-001-execution ===\n\n## User Acceptance\n\n- None.\n\n## Guardrails\n\n- Do not add command-line options beyond the fixed `-c` interface.\n- Preserve input ordering and stream multiplicity.\n- Use only the supplied stdin boundary and standard-library runtime.\n=== END ARTIFACT ==="}}
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