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{"type":"item.completed","item":{"id":"item_0","type":"agent_message","text":"=== BEGIN ARTIFACT FEATURE-Destructuring-Patterns.md ===\n# FEATURE: Destructuring Patterns\n\n| Field       | Value |\n|-------------|-------|\n| Version     | 20260822 V1 |\n| Description | Defines array and object destructuring bindings and alternative matching. |\n| Depends On  | FEATURE-Variable-Bindings.md, FEATURE-Conditionals-And-Exception-Flow.md, FEATURE-Declarations-And-Control-Syntax.md |\n| Provides    | Array patterns, object patterns, missing bindings, ?// alternatives |\n| Consumes    | Lexical bindings, generator errors, function scope |\n\n## Questions\n\n- None.\n\n## Purpose\n\nSupport jq destructuring patterns in `as` bindings and the `?//` destructuring alternative operator.\n\nArray patterns bind positional elements, using `null` for missing positions. Object patterns bind named fields, including nested patterns and renamed fields. Alternative patterns retry when matching or downstream evaluation fails, exposing unmatched variables as `null`.\n\n## Implementation Requirements\n\n- Parse array and object patterns with nested patterns.\n- Bind variables lexically for the remainder of the query.\n- Preserve generator ordering and backtracking.\n- Implement `?//` alternatives, including retry after downstream errors.\n- Reject malformed patterns and undefined bindings at compile time.\n- Preserve `null` bindings for variables absent from the successful alternative.\n\n## Programmatic Acceptance\n\n=== AC destructuring-conformance ===\nIntent: The authoritative corpus slice covering destructuring syntax and alternatives executes and passes.\nSuite: scoped\nRequires: executable=python3; scope=test\n\nimport json\nimport os\nimport subprocess\nimport sys\n\nselect = r\"\\?//| as \\{\"\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 destructuring-conformance ===\n\n## User Acceptance\n\n- None.\n\n## Guardrails\n\n- Do not treat destructuring bindings as mutable variables.\n- Do not retry an alternative after a successful alternative completes without error.\n- Do not load module fixtures while parsing or evaluating destructuring syntax.\n\n=== END ARTIFACT ===\n=== BEGIN ARTIFACT FEATURE-Path-Discovery.md ===\n# FEATURE: Path Discovery\n\n| Field       | Value |\n|-------------|-------|\n| Version     | 20260822 V1 |\n| Description | Defines jq path discovery, path filtering, and projection operations. |\n| Depends On  | FEATURE-Slices-And-Iteration.md, FEATURE-Destructuring-Patterns.md, FEATURE-Recursive-Generators.md |\n| Provides    | path, paths, pick, path projections |\n| Consumes    | Accessors, iteration, generator evaluation |\n\n## Questions\n\n- None.\n\n## Purpose\n\nImplement jq's path-oriented filters for discovering, filtering, and projecting nested array and object locations.\n\n## Implementation Requirements\n\n- Implement `path(expression)` for exact and pattern path expressions.\n- Implement `paths` and `paths(filter)` with stable traversal order.\n- Represent paths as arrays containing string object keys and integer array indexes.\n- Exclude the root path from `paths`.\n- Implement `pick(path-expressions)` while preserving missing projected fields as `null`.\n- Raise runtime errors for invalid path expressions.\n- Preserve path behavior through recursive descent and generators.\n\n## Programmatic Acceptance\n\n=== AC path-discovery-conformance ===\nIntent: The authoritative corpus slice covering path discovery and projection executes and passes.\nSuite: scoped\nRequires: executable=python3; scope=test\n\nimport json\nimport os\nimport subprocess\nimport sys\n\nselect = r\"path\\(|paths|pick\\(\"\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 path-discovery-conformance ===\n\n## User Acceptance\n\n- None.\n\n## Guardrails\n\n- Do not emit paths in traversal order different from jq's generator order.\n- Do not confuse a projected value with its path representation.\n- Do not silently accept invalid path expressions.\n\n=== END ARTIFACT ===\n=== BEGIN ARTIFACT FEATURE-Path-Primitives.md ===\n# FEATURE: Path Primitives\n\n| Field       | Value |\n|-------------|-------|\n| Version     | 20260822 V1 |\n| Description | Defines nested path lookup, creation, replacement, and deletion primitives. |\n| Depends On  | FEATURE-Path-Discovery.md, FEATURE-Field-And-Index-Access.md |\n| Provides    | getpath, setpath, delpaths |\n| Consumes    | Path discovery, immutable value model |\n\n## Questions\n\n- None.\n\n## Purpose\n\nImplement jq's primitive operations for reading, setting, and deleting values at nested paths.\n\n## Implementation Requirements\n\n- Implement `getpath(paths)` for one or more paths.\n- Implement `setpath(path; value)` with nested object and array creation.\n- Implement `delpaths(paths)` for multiple nested deletions.\n- Preserve immutable input values and return updated copies.\n- Handle missing object fields and array positions according to jq semantics.\n- Reject invalid path component types and invalid array operations with runtime errors.\n- Enforce path depth limits required by the corpus.\n\n## Programmatic Acceptance\n\n=== AC path-primitives-conformance ===\nIntent: The authoritative corpus slice covering getpath, setpath, and delpaths executes and passes.\nSuite: scoped\nRequires: executable=python3; scope=test\n\nimport json\nimport os\nimport subprocess\nimport sys\n\nselect = r\"getpath|setpath|delpaths\"\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 path-primitives-conformance ===\n\n## User Acceptance\n\n- None.\n\n## Guardrails\n\n- Do not mutate values aliased by another expression.\n- Do not convert invalid paths into silent no-ops except where jq specifies that behavior.\n- Do not bypass the path depth limit.\n\n=== END ARTIFACT ===\n=== BEGIN ARTIFACT FEATURE-Deletion-And-Assignment.md ===\n# FEATURE: Deletion And Assignment\n\n| Field       | Value |\n|-------------|-------|\n| Version     | 20260822 V1 |\n| Description | Defines jq deletion, plain assignment, update assignment, and arithmetic assignment. |\n| Depends On  | FEATURE-Path-Primitives.md, FEATURE-Arithmetic-And-Structural-Operators.md, FEATURE-Boolean-And-Alternative-Operators.md |\n| Provides    | del, =, |=, +=, -=, *=, /=, %=, //= |\n| Consumes    | Path primitives, arithmetic operators, generator evaluation |\n\n## Questions\n\n- None.\n\n## Purpose\n\nImplement jq's immutable path-based mutation operators and deletion behavior.\n\n## Implementation Requirements\n\n- Implement `del(path-expression)`.\n- Implement plain assignment with all values produced by the right-hand side.\n- Implement update assignment using the selected path value as the update input.\n- Implement arithmetic and defined-or assignment operators.\n- Support multiple paths and generator-valued left-hand sides.\n- Delete paths when an update expression produces `empty`.\n- Preserve the original input for sibling expressions evaluated after an assignment.\n- Use the first update result for `|=` as specified.\n\n## Programmatic Acceptance\n\n=== AC deletion-assignment-conformance ===\nIntent: The authoritative corpus slice covering deletion and assignment operators executes and passes.\nSuite: scoped\nRequires: executable=python3; scope=test\n\nimport json\nimport os\nimport subprocess\nimport sys\n\nselect = r\"=|\\|=|\\+=\"\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 deletion-assignment-conformance ===\n\n## User Acceptance\n\n- None.\n\n## Guardrails\n\n- Treat jq values as immutable.\n- Do not apply plain-assignment RHS filters to the selected path value.\n- Do not use the last update result for `|=`.\n- Do not leak mutations into sibling outputs or later evaluations of the original input.\n\n=== END ARTIFACT ===\n=== BEGIN ARTIFACT FEATURE-Complex-Assignment-Edges.md ===\n# FEATURE: Complex Assignment Edges\n\n| Field       | Value |\n|-------------|-------|\n| Version     | 20260822 V1 |\n| Description | Defines edge-case behavior for iterated, empty, fractional, invalid, and deep assignments. |\n| Depends On  | FEATURE-Deletion-And-Assignment.md, FEATURE-Path-Primitives.md |\n| Provides    | Iterated path assignment, empty-update deletion, array expansion, assignment depth protections |\n| Consumes    | Assignment operators, path primitives |\n\n## Questions\n\n- None.\n\n## Purpose\n\nComplete assignment semantics for complex path expressions and adversarial boundary cases.\n\n## Implementation Requirements\n\n- Apply assignments across iterated and multi-path selections in generator order.\n- Treat an update producing `empty` as deletion.\n- Expand arrays with `null` values when setting beyond their current length.\n- Handle negative, fractional, NaN, and out-of-range indexes according to jq semantics.\n- Reject invalid string updates and invalid array path components with runtime errors.\n- Enforce assignment path depth limits.\n- Preserve partial output behavior when a later assignment fails.\n\n## Programmatic Acceptance\n\n=== AC complex-assignment-conformance ===\nIntent: The authoritative corpus slice covering complex assignment edge cases executes and passes.\nSuite: scoped\nRequires: executable=python3; scope=test\n\nimport json\nimport os\nimport subprocess\nimport sys\n\nselect = r\"negative|NaN|depth|empty\"\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 complex-assignment-conformance ===\n\n## User Acceptance\n\n- None.\n\n## Guardrails\n\n- Do not silently clamp invalid assignment indexes when jq specifies an error.\n- Do not discard valid outputs produced before a later runtime failure.\n- Do not exceed configured path depth limits through recursive or iterated assignments.\n\n=== END ARTIFACT ==="}}
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