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{"type":"item.completed","item":{"id":"item_0","type":"agent_message","text":"=== BEGIN ARTIFACT FEATURE-Reductions-And-Iteration-Control.md ===\n# FEATURE: Reductions and Iteration Control\n\n| Field | Value |\n|-------------|-------|\n| Version | 20260822 V1 |\n| Description | Provides jq reductions and generator-control builtins with stateful stream semantics. |\n| Depends On | ARCHITECTURE.md, FEATURE-Generator-Core.md, FEATURE-Labels-And-Breaks.md, FEATURE-Variable-Bindings.md |\n| Provides | reduce, foreach, range, limit, skip, first, last, nth |\n| Consumes | ordered generators, lexical labels, variable bindings |\n\n## Questions\n\n- None.\n\n## Workflow\n\nImplement `reduce` and `foreach` state transitions over generator inputs. Implement `range`, `limit`, `skip`, `first`, `last`, and `nth`, including multi-valued arguments, empty streams, negative-count errors, extraction behavior, and label-based termination. Preserve jq's ordering, backtracking, and accumulator semantics.\n\n## Programmatic Acceptance\n\n=== AC flow-005-conformance ===\nIntent: The authoritative corpus slice exercising reductions and iteration controls executes and passes.\nSuite: scoped\nRequires: executable=python3; scope=test\n\nimport json\nimport os\nimport subprocess\nimport sys\n\nselect = r\"reduce|foreach|limit|skip|nth|first|last\"\nresult = subprocess.run(\n [sys.executable, \"sources/run_conformance.py\", \"--select\", select, \"--json\"],\n capture_output=True,\n text=True,\n env={**os.environ, \"JQ\": f\"{os.getcwd()}/jq\"},\n)\nprint(result.stdout)\nprint(result.stderr, file=sys.stderr)\nreport = json.loads(result.stdout)\nsummary = report[\"summary\"]\nassert sum(summary.values()) > 0\nassert summary[\"fail\"] == 0\nassert summary[\"error\"] == 0\nassert result.returncode == 0\n=== END AC flow-005-conformance ===\n\n=== AC flow-005-interface ===\nIntent: The implementation exposes every declared reduction and iteration-control interface.\nimport subprocess\nimport sys\n\nprogram = \"reduce .[] as $x (0; . + $x)\"\npayload = \"[1,2,3]\\n\"\nresult = subprocess.run(\n [\"./jq\", \"-c\", program],\n input=payload,\n capture_output=True,\n text=True,\n)\nassert result.returncode in (0, 5)\n=== END AC flow-005-interface ===\n\n## User Acceptance\n\n- None.\n\n## Guardrails\n\n- Preserve generator order, multiplicity, and backtracking.\n- Do not replace stateful reductions with single-value evaluation.\n- Do not alter staged conformance assets.\n=== END ARTIFACT ===\n=== BEGIN ARTIFACT FEATURE-Recursive-Generators.md ===\n# FEATURE: Recursive Generators\n\n| Field | Value |\n|-------------|-------|\n| Version | 20260822 V1 |\n| Description | Provides jq recursive generator primitives and recursive descent. |\n| Depends On | ARCHITECTURE.md, FEATURE-Conditionals-And-Exception-Flow.md, FEATURE-Reductions-And-Iteration-Control.md, FEATURE-Function-Definitions-And-Recursion.md |\n| Provides | while, until, repeat, recurse, recursive descent |\n| Consumes | generator evaluation, conditionals, user-defined functions |\n\n## Questions\n\n- None.\n\n## Workflow\n\nImplement `while`, `until`, `repeat`, and the zero-argument and parameterized forms of `recurse`. Support recursive descent through `..`, stream-valued updates, termination conditions, error termination for `repeat`, and recursion without incorrect output suppression or duplication.\n\n## Programmatic Acceptance\n\n=== AC flow-006-conformance ===\nIntent: The authoritative corpus slice exercising recursive generators executes and passes.\nSuite: scoped\nRequires: executable=python3; scope=test\n\nimport json\nimport os\nimport subprocess\nimport sys\n\nselect = r\"while|until|recurse|repeat\"\nresult = subprocess.run(\n [sys.executable, \"sources/run_conformance.py\", \"--select\", select, \"--json\"],\n capture_output=True,\n text=True,\n env={**os.environ, \"JQ\": f\"{os.getcwd()}/jq\"},\n)\nprint(result.stdout)\nprint(result.stderr, file=sys.stderr)\nreport = json.loads(result.stdout)\nsummary = report[\"summary\"]\nassert sum(summary.values()) > 0\nassert summary[\"fail\"] == 0\nassert summary[\"error\"] == 0\nassert result.returncode == 0\n=== END AC flow-006-conformance ===\n\n=== AC flow-006-interface ===\nIntent: The recursive generator interface executes a terminating recursive transformation.\nimport subprocess\n\nprogram = \"[while(. < 4; . + 1)]\"\npayload = \"1\\n\"\nresult = subprocess.run(\n [\"./jq\", \"-c\", program],\n input=payload,\n capture_output=True,\n text=True,\n)\nassert result.returncode in (0, 5)\n=== END AC flow-006-interface ===\n\n## User Acceptance\n\n- None.\n\n## Guardrails\n\n- Ensure recursive generators terminate according to their conditions or caught errors.\n- Preserve every generated value in order.\n- Do not introduce external runtimes or modify staged sources.\n=== END ARTIFACT ===\n=== BEGIN ARTIFACT FEATURE-Variable-Bindings.md ===\n# FEATURE: Variable Bindings\n\n| Field | Value |\n|-------------|-------|\n| Version | 20260822 V1 |\n| Description | Provides lexical jq value bindings with scoped lifetime and shadowing. |\n| Depends On | ARCHITECTURE.md, FEATURE-Declarations-And-Control-Syntax.md, FEATURE-Composition-And-Cartesian-Evaluation.md |\n| Provides | as bindings, nested scope, shadowing, keyword identifiers, binding lifetime |\n| Consumes | parsed patterns, generator evaluation, lexical environments |\n\n## Questions\n\n- None.\n\n## Workflow\n\nImplement `expression as $name | continuation` with lexical scope. Bind each output independently, preserve the original input for the continuation, support nested shadowing and keyword-shaped names, and maintain bindings correctly across generator backtracking and destructuring contexts.\n\n## Programmatic Acceptance\n\n=== AC func-001-conformance ===\nIntent: The authoritative corpus slice exercising lexical variable bindings executes and passes.\nSuite: scoped\nRequires: executable=python3; scope=test\n\nimport json\nimport os\nimport subprocess\nimport sys\n\nselect = r\" as \\$|\\$[A-Za-z]\"\nresult = subprocess.run(\n [sys.executable, \"sources/run_conformance.py\", \"--select\", select, \"--json\"],\n capture_output=True,\n text=True,\n env={**os.environ, \"JQ\": f\"{os.getcwd()}/jq\"},\n)\nprint(result.stdout)\nprint(result.stderr, file=sys.stderr)\nreport = json.loads(result.stdout)\nsummary = report[\"summary\"]\nassert sum(summary.values()) > 0\nassert summary[\"fail\"] == 0\nassert summary[\"error\"] == 0\nassert result.returncode == 0\n=== END AC func-001-conformance ===\n\n=== AC func-001-interface ===\nIntent: A binding preserves its value while the pipeline continues with the original input.\nimport subprocess\n\nprogram = \".bar as $x | .foo + $x\"\npayload = '{\"foo\":10,\"bar\":200}\\n'\nresult = subprocess.run(\n [\"./jq\", \"-c\", program],\n input=payload,\n capture_output=True,\n text=True,\n)\nassert result.returncode in (0, 5)\n=== END AC func-001-interface ===\n\n## User Acceptance\n\n- None.\n\n## Guardrails\n\n- Bindings are immutable and lexically scoped.\n- Do not leak inner shadowed bindings outside their scope.\n- Preserve binding values independently for every generator branch.\n=== END ARTIFACT ===\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 parameters with arity and closure semantics. |\n| Depends On | ARCHITECTURE.md, FEATURE-Variable-Bindings.md, FEATURE-Composition-And-Cartesian-Evaluation.md |\n| Provides | filter parameters, value parameters, multiple arities, closures, Cartesian arguments |\n| Consumes | lexical bindings, generator evaluation, function definitions |\n\n## Questions\n\n- None.\n\n## Workflow\n\nImplement user-defined functions whose parameters may be filters or value bindings. Support multiple arities, repeated callback evaluation with the current input, Cartesian products from multi-output arguments, and closure capture through lexical environments.\n\n## Programmatic Acceptance\n\n=== AC func-002-conformance ===\nIntent: The authoritative corpus slice exercising function parameters executes and passes.\nSuite: scoped\nRequires: executable=python3; scope=test\n\nimport json\nimport os\nimport subprocess\nimport sys\n\nselect = r\"def .*\\(\"\nresult = subprocess.run(\n [sys.executable, \"sources/run_conformance.py\", \"--select\", select, \"--json\"],\n capture_output=True,\n text=True,\n env={**os.environ, \"JQ\": f\"{os.getcwd()}/jq\"},\n)\nprint(result.stdout)\nprint(result.stderr, file=sys.stderr)\nreport = json.loads(result.stdout)\nsummary = report[\"summary\"]\nassert sum(summary.values()) > 0\nassert summary[\"fail\"] == 0\nassert summary[\"error\"] == 0\nassert result.returncode == 0\n=== END AC func-002-conformance ===\n\n=== AC func-002-interface ===\nIntent: A filter parameter is evaluated against the function's current input.\nimport subprocess\n\nprogram = \"def twice(f): f | f; 5 | twice(.*2)\"\npayload = \"null\\n\"\nresult = subprocess.run(\n [\"./jq\", \"-c\", program],\n input=payload,\n capture_output=True,\n text=True,\n)\nassert result.returncode in (0, 5)\n=== END AC func-002-interface ===\n\n## User Acceptance\n\n- None.\n\n## Guardrails\n\n- Distinguish filter parameters from value parameters.\n- Preserve callback re-evaluation and generator multiplicity.\n- Keep captured lexical environments isolated between calls.\n=== END ARTIFACT ===\n=== BEGIN ARTIFACT FEATURE-Function-Definitions-And-Recursion.md ===\n# FEATURE: Function Definitions and Recursion\n\n| Field | Value |\n|-------------|-------|\n| Version | 20260822 V1 |\n| Description | Provides jq function definitions, lexical function scope, redefinition, and recursion. |\n| Depends On | ARCHITECTURE.md, FEATURE-Declarations-And-Control-Syntax.md, FEATURE-Variable-Bindings.md, FEATURE-Function-Parameters.md |\n| Provides | def declarations, function redefinitions, lexical function scope, recursion |\n| Consumes | parser declarations, function parameters, lexical environments |\n\n## Questions\n\n- None.\n\n## Workflow\n\nImplement `def` declarations with arity-aware bindings. Support lexical visibility, later redefinitions, self-recursion, recursive calls through parameters, and function definitions nested within expressions while preserving jq's declaration ordering rules.\n\n## Programmatic Acceptance\n\n=== AC func-003-conformance ===\nIntent: The authoritative corpus slice exercising function definitions and recursion executes and passes.\nSuite: scoped\nRequires: executable=python3; scope=test\n\nimport json\nimport os\nimport subprocess\nimport sys\n\nselect = r\"def \"\nresult = subprocess.run(\n [sys.executable, \"sources/run_conformance.py\", \"--select\", select, \"--json\"],\n capture_output=True,\n text=True,\n env={**os.environ, \"JQ\": f\"{os.getcwd()}/jq\"},\n)\nprint(result.stdout)\nprint(result.stderr, file=sys.stderr)\nreport = json.loads(result.stdout)\nsummary = report[\"summary\"]\nassert sum(summary.values()) > 0\nassert summary[\"fail\"] == 0\nassert summary[\"error\"] == 0\nassert result.returncode == 0\n=== END AC func-003-conformance ===\n\n=== AC func-003-interface ===\nIntent: A recursively defined function evaluates to a completed result.\nimport subprocess\n\nprogram = \"def fac: if . == 1 then 1 else . * (. - 1 | fac) end; fac\"\npayload = \"4\\n\"\nresult = subprocess.run(\n [\"./jq\", \"-c\", program],\n input=payload,\n capture_output=True,\n text=True,\n)\nassert result.returncode in (0, 5)\n=== END AC func-003-interface ===\n\n## User Acceptance\n\n- None.\n\n## Guardrails\n\n- Enforce lexical visibility and arity-specific function lookup.\n- Permit self-recursion without permitting undefined references.\n- Preserve generator ordering through recursive calls.\n=== END ARTIFACT ==="}}
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Run artifact