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{"type":"item.completed","item":{"id":"item_0","type":"agent_message","text":"=== BEGIN ARTIFACT ARCHITECTURE.md ===\n# ARCHITECTURE: jq\n\n| Field       | Value |\n|-------------|-------|\n| Version     | 20260822 V1 |\n| Description | Defines the modular standard-library architecture for a standalone jq interpreter. |\n| Depends On  |  |\n| Provides    | interpreter architecture, executable boundary, generator evaluation model |\n| Consumes    |  |\n\n## Questions\n\n- None.\n\n## Architecture\n\nThe implementation is a modular Python interpreter with an executable `jq` entry point. The runtime is divided into:\n\n- CLI and process boundary: argument handling, JSON input decoding, compact output, diagnostics, and exit codes.\n- Lexer: jq tokens, comments, literals, identifiers, fields, bindings, delimiters, and formats.\n- Parser: precedence-aware AST construction, declarations, control syntax, patterns, and compile diagnostics.\n- Value model: immutable JSON-compatible values, numeric literals, NaN, and infinities.\n- Evaluator: ordered generator execution, backtracking, scopes, errors, labels, and assignments.\n- Builtins: arithmetic, collections, strings, regular expressions, dates, paths, I/O, and streaming.\n\nAll runtime code uses Python's standard library. No system jq executable, third-party jq implementation, package, network service, or external runtime dependency is permitted.\n\n### Ownership boundaries\n\n| Area | Owner | Boundary |\n|---|---|---|\n| CLI and serialization | executable/process modules | Owns stdin, stdout, stderr, and process status |\n| Lexing and parsing | lexer/parser modules | Produces executable AST or equivalent |\n| Values | value module | Owns numeric and immutable value behavior |\n| Evaluation | evaluator module | Owns generator ordering, scopes, errors, and control flow |\n| Builtins | builtin/runtime modules | Operates through evaluator and value interfaces |\n| Conformance assets | `sources/` | Read-only external test and specification assets |\n\nThe evaluator must expose generator semantics rather than scalar function semantics: each filter consumes one input and may produce zero, one, or many ordered outputs.\n\n## Technology Stack\n\n- Python 3.11 or newer, standard library only, for the interpreter and acceptance checks.\n- POSIX `sh` for the supplied conformance entry point.\n\n## Programmatic Acceptance\n\n=== AC architecture-runtime ===\nIntent: The architecture establishes an executable Python runtime boundary.\nimport os\nimport subprocess\nimport sys\n\nresult = subprocess.run(\n    [os.path.join(os.getcwd(), \"jq\"), \"-c\", \".\"],\n    input=\"null\\n\",\n    capture_output=True,\n    text=True,\n)\nprint(result.stdout)\nprint(result.stderr, file=sys.stderr)\nassert result.returncode == 0\n=== END AC architecture-runtime ===\n\n=== AC architecture-stdlib ===\nIntent: The architecture runs with the declared Python standard-library runtime.\nimport sys\n\nassert sys.version_info >= (3, 11)\nimport argparse\nimport base64\nimport dataclasses\nimport datetime\nimport decimal\nimport itertools\nimport json\nimport math\nimport re\n=== END AC architecture-stdlib ===\n\n## User Acceptance\n\n- None.\n\n## Guardrails\n\n- Do not shell out to jq.\n- Do not use third-party packages or bindings.\n- Preserve generator ordering, multiplicity, backtracking, and partial output.\n- Keep `sources/` read-only.\n=== END ARTIFACT ===\n=== BEGIN ARTIFACT FEATURE-Executable-Entry-Point.md ===\n# FEATURE: Executable Entry Point\n\n| Field       | Value |\n|-------------|-------|\n| Version     | 20260822 V1 |\n| Description | Provides the executable jq command and its fixed compact filter interface. |\n| Depends On  | ARCHITECTURE.md |\n| Provides    | executable jq, -c filter invocation |\n| Consumes    | interpreter architecture, JSON input stream |\n\n## Questions\n\n- None.\n\n## Intent\n\nThe application root contains an executable named `jq`. It accepts `-c '<program>'`, reads JSON values from standard input, evaluates the supplied filter, and writes each generated value as one compact JSON value per line.\n\n## Programmatic Acceptance\n\n=== AC exec-entrypoint ===\nIntent: The executable entry point runs the corpus's primitive interface cases.\nimport json\nimport os\nimport subprocess\nimport sys\n\nresult = subprocess.run(\n    [sys.executable, \"sources/run_conformance.py\", \"--select\", r\"^(true|false|null|1)$\", \"--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 and summary[\"error\"] == 0\nassert result.returncode == 0\n=== END AC exec-entrypoint ===\n\n=== AC exec-interface ===\nIntent: The executable accepts the declared compact command-line interface and completes successfully.\nimport os\nimport subprocess\n\npayload = \"null\\n\"\nresult = subprocess.run(\n    [os.path.join(os.getcwd(), \"jq\"), \"-c\", \".\"],\n    input=payload,\n    capture_output=True,\n    text=True,\n)\nprint(result.stdout)\nprint(result.stderr, file=__import__(\"sys\").stderr)\nassert result.returncode == 0\nassert result.stdout.splitlines()\n=== END AC exec-interface ===\n\n## User Acceptance\n\n- None.\n\n## Guardrails\n\n- The executable must be named `jq` and located at the application root.\n- `-c` is the only exercised option.\n- Output must contain one compact JSON value per line.\n=== END ARTIFACT ===\n=== BEGIN ARTIFACT FEATURE-Process-Contract.md ===\n# FEATURE: Process Contract\n\n| Field       | Value |\n|-------------|-------|\n| Version     | 20260822 V1 |\n| Description | Defines jq compilation, runtime failure, success, and diagnostic exit behavior. |\n| Depends On  | FEATURE-Executable-Entry-Point.md, FEATURE-Declarations-And-Control-Syntax.md, FEATURE-Errors-And-Optional-Evaluation.md |\n| Provides    | compile exit 3, runtime exit 5, success exit 0, stderr diagnostics |\n| Consumes    | executable jq, parser, evaluator |\n\n## Questions\n\n- None.\n\n## Intent\n\nCompilation failures return exit code `3`. Runtime failures return exit code `5`. Successful completion returns `0`. Diagnostics are written to standard error, and values emitted before a runtime failure remain on standard output.\n\n## Programmatic Acceptance\n\n=== AC process-contract-compile ===\nIntent: Invalid jq programs are rejected with the compile-failure status.\nimport os\nimport subprocess\n\nresult = subprocess.run(\n    [os.path.join(os.getcwd(), \"jq\"), \"-c\", \"{\"],\n    input=\"null\\n\",\n    capture_output=True,\n    text=True,\n)\nprint(result.stdout)\nprint(result.stderr, file=__import__(\"sys\").stderr)\nassert result.returncode == 3\n=== END AC process-contract-compile ===\n\n=== AC process-contract-runtime ===\nIntent: A valid jq program that raises at runtime returns the runtime-failure status.\nimport os\nimport subprocess\n\nresult = subprocess.run(\n    [os.path.join(os.getcwd(), \"jq\"), \"-c\", \"error\"],\n    input=\"null\\n\",\n    capture_output=True,\n    text=True,\n)\nprint(result.stdout)\nprint(result.stderr, file=__import__(\"sys\").stderr)\nassert result.returncode == 5\n=== END AC process-contract-runtime ===\n\n=== AC process-contract-partial-output ===\nIntent: Runtime failure preserves values emitted before the failure.\nimport os\nimport subprocess\n\nresult = subprocess.run(\n    [os.path.join(os.getcwd(), \"jq\"), \"-c\", \"1, error\"],\n    input=\"null\\n\",\n    capture_output=True,\n    text=True,\n)\nprint(result.stdout)\nprint(result.stderr, file=__import__(\"sys\").stderr)\nassert result.returncode == 5\nassert result.stdout.splitlines()\n=== END AC process-contract-partial-output ===\n\n## User Acceptance\n\n- None.\n\n## Guardrails\n\n- Compile and runtime failures must remain distinguishable.\n- Diagnostics must never be required on stdout.\n- Do not discard partial output before a runtime error.\n=== END ARTIFACT ===\n=== BEGIN ARTIFACT FEATURE-JSON-IO-BoundARY.md ===\n# FEATURE: JSON I/O Boundary\n\n| Field       | Value |\n|-------------|-------|\n| Version     | 20260822 V1 |\n| Description | Handles JSON input streams and compact output serialization for jq values. |\n| Depends On  | ARCHITECTURE.md, FEATURE-Executable-Entry-Point.md, FEATURE-Value-Model.md |\n| Provides    | JSON stdin decoding, compact JSON line serialization, Unicode and special-number handling |\n| Consumes    | executable jq, JSON value model |\n\n## Questions\n\n- None.\n\n## Intent\n\nThe process boundary decodes each JSON input value supplied on standard input and serializes every generated result compactly, preserving order and the value distinctions required by the conformance harness.\n\n## Programmatic Acceptance\n\n=== AC json-boundary ===\nIntent: JSON boundary behavior passes the corpus cases covering primitive input and output serialization.\nimport json\nimport os\nimport subprocess\nimport sys\n\nresult = subprocess.run(\n    [sys.executable, \"sources/run_conformance.py\", \"--select\", r\"^(true|false|null|1)$\", \"--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 and summary[\"error\"] == 0\nassert result.returncode == 0\n=== END AC json-boundary ===\n\n=== AC json-order ===\nIntent: Multiple input values and generated outputs preserve stream order.\nimport json\nimport os\nimport subprocess\n\npayload = \"1\\n2\\n\"\nresult = subprocess.run(\n    [os.path.join(os.getcwd(), \"jq\"), \"-c\", \".\"],\n    input=payload,\n    capture_output=True,\n    text=True,\n)\nprint(result.stdout)\nprint(result.stderr, file=__import__(\"sys\").stderr)\nassert result.returncode == 0\nactual = [json.loads(line) for line in result.stdout.splitlines()]\nexpected = [1, 2]\nassert actual == expected\n=== END AC json-order ===\n\n## User Acceptance\n\n- None.\n\n## Guardrails\n\n- Emit compact JSON values one per line.\n- Preserve output order and multiplicity.\n- Do not alter supplied conformance assets.\n=== END ARTIFACT ===\n=== BEGIN ARTIFACT FEATURE-Lexer.md ===\n# FEATURE: Lexer\n\n| Field       | Value |\n|-------------|-------|\n| Version     | 20260822 V1 |\n| Description | Tokenizes jq source into keywords, literals, identifiers, operators, and delimiters. |\n| Depends On  | ARCHITECTURE.md |\n| Provides    | jq tokens, comments, delimiters, identifiers, fields, literals, bindings |\n| Consumes    | interpreter architecture |\n\n## Questions\n\n- None.\n\n## Intent\n\nThe lexer recognizes jq keywords, identifiers, fields, variable bindings, numeric and string literals, operators, comments, formats, delimiters, and the state transitions required by interpolation and nested expressions.\n\n## Programmatic Acceptance\n\n=== AC lexer-corpus ===\nIntent: Lexer-focused primitive and literal cases execute successfully through the supplied conformance runner.\nimport json\nimport os\nimport subprocess\nimport sys\n\nresult = subprocess.run(\n    [sys.executable, \"sources/run_conformance.py\", \"--select\", r\"^(true|false|null|1|\\.)$\", \"--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 and summary[\"error\"] == 0\nassert result.returncode == 0\n=== END AC lexer-corpus ===\n\n=== AC lexer-comments ===\nIntent: The lexer accepts comments and ignores them outside string literals.\nimport os\nimport subprocess\nimport sys\n\nresult = subprocess.run(\n    [os.path.join(os.getcwd(), \"jq\"), \"-c\", \"1 # comment\"],\n    input=\"null\\n\",\n    capture_output=True,\n    text=True,\n)\nprint(result.stdout)\nprint(result.stderr, file=sys.stderr)\nassert result.returncode == 0\nassert result.stdout.splitlines()\n=== END AC lexer-comments ===\n\n## User Acceptance\n\n- None.\n\n## Guardrails\n\n- Invalid characters and malformed tokens must produce compile failure.\n- Comment handling must not consume string contents.\n- Nested delimiters and interpolation state must remain balanced.\n=== END ARTIFACT ==="}}
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