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{"type":"item.completed","item":{"id":"item_0","type":"agent_message","text":"=== BEGIN ARTIFACT FEATURE-Accessors.md ===\n# FEATURE: Accessors\n\n| Field | Value |\n|-------------|-------|\n| Version | 20260822 V1 |\n| Description | Defines object-field access, array indexing, optional access, and negative-index behavior. |\n| Depends On | FEATURE-Value-Model.md |\n| Provides | object fields, array indices, optional access, negative indices |\n| Consumes | jq value model |\n\n## Questions\n\n- None.\n\n## Access Semantics\n\nObject fields return the matching value or null when absent. Array indices are zero-based and support negative indices. Invalid access raises a jq runtime error unless the expression is optional, in which case the error is suppressed according to jq semantics.\n\n## Programmatic Acceptance\n\n=== AC value-002-conformance ===\nIntent: Field access, negative indexing, and optional access produce the supplied jq behavior.\nRequires: executable=python3; scope=test\n\nimport json\nimport subprocess\n\npayload = '{\"field\":[10,20,30]}\\n'\nresult = subprocess.run(\n [\"./jq\", \"-c\", \".field[-1], .missing?, .field[0]\"],\n input=payload,\n capture_output=True,\n text=True,\n)\nassert result.returncode == 0\nactual = [json.loads(line) for line in result.stdout.splitlines()]\nexpected = [30, None, 10]\nassert actual == expected\n=== END AC value-002-conformance ===\n\n=== AC value-002-access-contract ===\nIntent: Field access, negative indexing, and optional access produce the supplied jq behavior.\nRequires: executable=python3; scope=test\n\nimport json\nimport subprocess\n\npayload = '{\"field\":[10,20,30]}\\n'\nresult = subprocess.run(\n [\"./jq\", \"-c\", \".field[-1], .missing?, .field[0]\"],\n input=payload,\n capture_output=True,\n text=True,\n)\nassert result.returncode == 0\nactual = [json.loads(line) for line in result.stdout.splitlines()]\nexpected = [30, None, 10]\nassert actual == expected\n=== END AC value-002-access-contract ===\n\n## User Acceptance\n\n- None.\n\n## Guardrails\n\n- Missing fields yield null rather than Python exceptions.\n- Negative array indices follow jq indexing rules.\n- Optional access suppresses only the applicable runtime access error.\n=== END ARTIFACT ===\n=== BEGIN ARTIFACT FEATURE-Arithmetic-Operators.md ===\n# FEATURE: Arithmetic Operators\n\n| Field | Value |\n|-------------|-------|\n| Version | 20260822 V1 |\n| Description | Define jq arithmetic, structural combination, repetition, splitting, and negation operators. |\n| Depends On | FEATURE-Type-and-Numeric-Builtins.md |\n| Provides | plus, minus, multiply, divide, modulo, negation, recursive object merge, string repetition and splitting |\n| Consumes | type and numeric builtins, jq generator evaluation |\n\n## Questions\n\n- None.\n\n## Intent\n\nArithmetic operators apply jq's type-directed operations while preserving generator Cartesian products, immutable values, and runtime error behavior.\n\n## Behavior\n\n- Numeric operators perform arithmetic with jq-compatible numeric handling.\n- `+` combines numbers, arrays, strings, objects, and null as specified.\n- `-` subtracts numbers or removes matching array elements.\n- `*` supports numeric multiplication, string repetition, and recursive object merge.\n- `/` supports numeric division and string splitting.\n- `%` performs numeric remainder.\n- Unary negation applies only to numbers.\n- Division, remainder, invalid combinations, and excessive string repetition raise runtime errors with exit status 5 when uncaught.\n\n## Programmatic Acceptance\n\n=== AC flow-001-conformance ===\nIntent: Numeric and structural arithmetic operators produce jq-compatible results.\nRequires: executable=python3; scope=test\n\nimport json\nimport subprocess\n\nresult = subprocess.run(\n [\"./jq\", \"-c\", \"1+2, 7-3, 4*5, 7/2, 7%4, -6, [1,2]+[3], \\\"ab\\\"*2, \\\"a,b\\\"/\\\",\\\"\"],\n input=\"null\\n\",\n capture_output=True,\n text=True,\n)\nassert result.returncode == 0\nactual = [json.loads(line) for line in result.stdout.splitlines()]\nexpected = [3, 4, 20, 3.5, 3, -6, [1, 2, 3], \"abab\", [\"a\", \"b\"]]\nassert actual == expected\n=== END AC flow-001-conformance ===\n\n## User Acceptance\n\n- None.\n\n## Guardrails\n\n- Operators must preserve output order and multiplicity.\n- Values remain immutable; assignment semantics are outside this capability.\n- Do not implement structural operations through implicit Python type coercion.\n=== END ARTIFACT ===\n=== BEGIN ARTIFACT FEATURE-Assignment-Operators.md ===\n# FEATURE: Deletion and Assignment Operators\n\n| Field | Value |\n|-------------|-------|\n| Version | 20260822 V1 |\n| Description | Implements jq deletion, plain assignment, update assignment, and arithmetic assignment. |\n| Depends On | FEATURE-Path-Primitives.md |\n| Provides | del, =, |=, arithmetic assignments, defined-or assignment |\n| Consumes | getpath, setpath, delpaths |\n\n## Questions\n\n- None.\n\n## Scope\n\nImplement immutable deletion and assignment over exact and iterated path expressions. Plain assignment evaluates its right-hand side against the original input and uses every produced value; update assignment evaluates against each selected path and uses the first update result. Arithmetic and defined-or assignments build on update assignment, and empty updates delete selected paths.\n\n## Programmatic Acceptance\n\n=== AC path-003-conformance ===\nIntent: Deletion, plain assignment, update assignment, and arithmetic assignment preserve immutable jq semantics.\nRequires: executable=python3; scope=test\n\nimport json\nimport subprocess\n\nresult = subprocess.run(\n [\"./jq\", \"-c\", \"del(.obsolete), (.count = 2), (.count |= . + 3), (.count += 4)\"],\n input='{\"count\":1,\"obsolete\":true}\\n',\n capture_output=True,\n text=True,\n)\nassert result.returncode == 0\nactual = [json.loads(line) for line in result.stdout.splitlines()]\nexpected = [\n {\"count\": 1},\n {\"count\": 2, \"obsolete\": True},\n {\"count\": 4, \"obsolete\": True},\n {\"count\": 5, \"obsolete\": True},\n]\nassert actual == expected\n=== END AC path-003-conformance ===\n\n## User Acceptance\n\n- None.\n\n## Guardrails\n\n- Assignments must preserve jq's immutable snapshot semantics.\n- Multi-path and generator-valued assignments must preserve output multiplicity and order.\n=== END ARTIFACT ===\n=== BEGIN ARTIFACT FEATURE-Boolean-and-Alternative-Operators.md ===\n# FEATURE: Boolean and Alternative Operators\n\n| Field | Value |\n|-------------|-------|\n| Version | 20260822 V1 |\n| Description | Define jq boolean, negation, defined-or, and defined-or assignment semantics. |\n| Depends On | FEATURE-Arithmetic-Operators.md, FEATURE-Truthiness-and-Comparison.md |\n| Provides | and, or, not, defined-or, defined-or assignment |\n| Consumes | jq truthiness, comparison, and generator evaluation |\n\n## Questions\n\n- None.\n\n## Intent\n\nThis capability implements jq's boolean and fallback operators with false/null truthiness, generator-aware output, and short-circuit behavior.\n\n## Behavior\n\n- Only `false` and `null` are falsey.\n- `and` and `or` produce boolean results for each relevant generator combination.\n- `not` produces the inverse truth value.\n- `//` emits non-false/non-null left outputs, otherwise all right outputs.\n- `//=` updates defined-or paths while preserving immutable assignment behavior.\n- Boolean and alternative expressions preserve generator ordering and short-circuit errors where jq requires them.\n\n## Programmatic Acceptance\n\n=== AC flow-002-conformance ===\nIntent: Boolean, negation, and defined-or operators follow jq truthiness and fallback semantics.\nRequires: executable=python3; scope=test\n\nimport json\nimport subprocess\n\nresult = subprocess.run(\n [\"./jq\", \"-c\", \"(true and false), (true or false), (false|not), (null // 7), (3 // 7)\"],\n input=\"null\\n\",\n capture_output=True,\n text=True,\n)\nassert result.returncode == 0\nactual = [json.loads(line) for line in result.stdout.splitlines()]\nexpected = [False, True, True, 7, 3]\nassert actual == expected\n=== END AC flow-002-conformance ===\n\n## User Acceptance\n\n- None.\n\n## Guardrails\n\n- Do not use Python truthiness in place of jq truthiness.\n- `//` must not be reduced to ordinary boolean `or`.\n- Preserve generator multiplicity and fallback evaluation semantics.\n=== END ARTIFACT ===\n=== BEGIN ARTIFACT FEATURE-Collection-Transforms.md ===\n# FEATURE: Collection Transforms\n\n| Field | Value |\n|-------------|-------|\n| Version | 20260822 V1 |\n| Description | Provides jq collection transformation builtins with generator-aware recursive behavior. |\n| Depends On | FEATURE-Complex-Assignments.md, FEATURE-Generator-Core.md |\n| Provides | map, map_values, select, add, flatten, transpose, combinations, walk |\n| Consumes | assignment operators, ordered generator evaluation |\n\n## Questions\n\n- None.\n\n## Scope\n\nThis feature implements collection transformation filters over arrays and objects. It preserves jq stream multiplicity, empty-result deletion behavior, recursive traversal order, bounded flattening, jagged-matrix padding, and Cartesian combinations.\n\n## Behavior\n\n- `map` collects all outputs produced for each input element.\n- `map_values` updates each element or object value using the first produced result and removes values producing `empty`.\n- `select` preserves the input only for truthy predicates.\n- `add` reduces array or generated values using jq addition.\n- `flatten` supports unlimited and bounded depth, rejecting negative depth.\n- `transpose` pads jagged rows with `null`.\n- `combinations` produces ordered Cartesian combinations.\n- `walk` transforms children before their containing array or object.\n\n## Programmatic Acceptance\n\n=== AC data-001-conformance ===\nIntent: Collection transformation builtins preserve collection shape, ordering, and Cartesian behavior.\nRequires: executable=python3; scope=test\n\nimport json\nimport subprocess\n\nresult = subprocess.run(\n [\"./jq\", \"-c\", \"map(. * 2), map_values(. + 1), select(length == 2), add, flatten(1), transpose, combinations\"],\n input='[1,2]\\n',\n capture_output=True,\n text=True,\n)\nassert result.returncode == 0\nactual = [json.loads(line) for line in result.stdout.splitlines()]\nassert actual[0] == [2, 4]\nassert actual[1] == [2, 3]\n=== END AC data-001-conformance ===\n\n## User Acceptance\n\n- None.\n\n## Guardrails\n\n- Use only Python standard-library facilities.\n- Preserve generator ordering and multiplicity.\n- Do not modify files under `sources/`.\n=== END ARTIFACT ==="}}
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