=== BEGIN ARTIFACT FEATURE-TEXT-002.md ===
# FEATURE: JSON and Output Format Filters

| Field       | Value |
|-------------|-------|
| Version     | 20260822 V1 |
| Description | Provide JSON conversion and jq output-format filters with standard-library escaping semantics. |
| Depends On  | ARCHITECTURE.md, FEATURE-TEXT-001.md, FEATURE-VALUE-001.md |
| Provides    | tostring, tojson, fromjson, @text, @json, @html, @uri, @urid, @csv, @tsv, @sh, @base64, @base64d |
| Consumes    | jq value model, string manipulation |

## Questions

- None.

## Workflow

Implement conversion filters and format filters using only Python standard-library facilities. Preserve interpolation behavior, compact JSON conversion, Unicode handling, escaping rules, and generator ordering. Support HTML, URI, shell, CSV, TSV, Base64, and inverse Base64 formats described by the manual.

## Programmatic Acceptance

=== AC text-002-scoped-conformance ===
Intent: The authoritative corpus cases covering JSON conversion and output formats execute and pass.
Suite: scoped
Requires: executable=python3; scope=test

import json
import os
import subprocess
import sys

selector = r"@text|@json|@html|@uri|@urid|@csv|@tsv|@sh|@base64|@base64d|tojson|fromjson|tostring"
result = subprocess.run(
    [sys.executable, "sources/run_conformance.py", "--select", selector, "--json"],
    capture_output=True,
    text=True,
    env={**os.environ, "JQ": f"{os.getcwd()}/jq"},
)
print(result.stdout)
print(result.stderr, file=sys.stderr)
report = json.loads(result.stdout)
summary = report["summary"]
assert sum(summary.values()) > 0
assert summary["fail"] == 0 and summary["error"] == 0
assert result.returncode == 0
=== END AC text-002-scoped-conformance ===

=== AC text-002-formats ===
Intent: The corpus exercises the declared format families rather than an empty selector.
Suite: scoped
Requires: executable=python3; scope=test

import json
import os
import subprocess
import sys

selector = r"@html|@uri|@base64|@csv|@tsv|@sh"
result = subprocess.run(
    [sys.executable, "sources/run_conformance.py", "--select", selector, "--json"],
    capture_output=True,
    text=True,
    env={**os.environ, "JQ": f"{os.getcwd()}/jq"},
)
print(result.stdout)
print(result.stderr, file=sys.stderr)
report = json.loads(result.stdout)
summary = report["summary"]
assert sum(summary.values()) > 0
assert summary["fail"] == 0 and summary["error"] == 0
assert result.returncode == 0
=== END AC text-002-formats ===

## User Acceptance

- None.

## Guardrails

- Do not shell out to jq or use third-party formatting libraries.
- Preserve stdout JSON-lines behavior and send diagnostics only to stderr.
=== END ARTIFACT ===
=== BEGIN ARTIFACT FEATURE-TEXT-003.md ===
# FEATURE: Regular-Expression Filters

| Field       | Value |
|-------------|-------|
| Version     | 20260822 V1 |
| Description | Provide jq regular-expression matching, capture, scanning, splitting, and substitution filters. |
| Depends On  | ARCHITECTURE.md, FEATURE-TEXT-002.md |
| Provides    | test, match, capture, scan, split, splits, sub, gsub |
| Consumes    | jq strings, generator evaluator |

## Questions

- None.

## Workflow

Implement the regex filters with Python's standard-library `re` module. Map the required jq flags, preserve Unicode codepoint offsets, emit named and unnamed capture structures, support global streams, and implement regex splitting and substitution with interpolation-aware replacement values.

## Programmatic Acceptance

=== AC text-003-regex-conformance ===
Intent: The authoritative corpus cases covering regular-expression filters execute and pass.
Suite: scoped
Requires: executable=python3; scope=test

import json
import os
import subprocess
import sys

selector = r"test\(|match\(|capture\(|scan\(|sub\(|gsub\(|splits\("
result = subprocess.run(
    [sys.executable, "sources/run_conformance.py", "--select", selector, "--json"],
    capture_output=True,
    text=True,
    env={**os.environ, "JQ": f"{os.getcwd()}/jq"},
)
print(result.stdout)
print(result.stderr, file=sys.stderr)
report = json.loads(result.stdout)
summary = report["summary"]
assert sum(summary.values()) > 0
assert summary["fail"] == 0 and summary["error"] == 0
assert result.returncode == 0
=== END AC text-003-regex-conformance ===

=== AC text-003-captures ===
Intent: The selected corpus includes matching, named capture, and replacement behavior.
Suite: scoped
Requires: executable=python3; scope=test

import json
import os
import subprocess
import sys

selector = r"match\(|capture\(|sub\(|gsub\("
result = subprocess.run(
    [sys.executable, "sources/run_conformance.py", "--select", selector, "--json"],
    capture_output=True,
    text=True,
    env={**os.environ, "JQ": f"{os.getcwd()}/jq"},
)
print(result.stdout)
print(result.stderr, file=sys.stderr)
report = json.loads(result.stdout)
summary = report["summary"]
assert sum(summary.values()) > 0
assert summary["fail"] == 0 and summary["error"] == 0
assert result.returncode == 0
=== END AC text-003-captures ===

## User Acceptance

- None.

## Guardrails

- Use only the Python standard library for regular expressions.
- Preserve generator multiplicity and output ordering for global matches and replacement streams.
=== END ARTIFACT ===
=== BEGIN ARTIFACT FEATURE-TEXT-004.md ===
# FEATURE: Date and Time Filters

| Field       | Value |
|-------------|-------|
| Version     | 20260822 V1 |
| Description | Provide UTC date parsing, formatting, and low-level time conversion filters. |
| Depends On  | ARCHITECTURE.md, FEATURE-TEXT-003.md |
| Provides    | fromdate, todate, strptime, strftime, strflocaltime, gmtime, localtime, mktime |
| Consumes    | jq strings and numbers |

## Questions

- None.

## Workflow

Implement the documented date and time filters with Python's standard-library `datetime` and `time` facilities. ISO-8601 convenience filters operate in UTC; low-level conversions preserve jq's broken-down time-array shape and accept the supplied format strings.

## Programmatic Acceptance

=== AC text-004-date-conformance ===
Intent: The authoritative corpus cases covering date and time filters execute and pass.
Suite: scoped
Requires: executable=python3; scope=test

import json
import os
import subprocess
import sys

selector = r"date|strftime|strptime|strflocaltime|gmtime|localtime|mktime"
result = subprocess.run(
    [sys.executable, "sources/run_conformance.py", "--select", selector, "--json"],
    capture_output=True,
    text=True,
    env={**os.environ, "JQ": f"{os.getcwd()}/jq"},
)
print(result.stdout)
print(result.stderr, file=sys.stderr)
report = json.loads(result.stdout)
summary = report["summary"]
assert sum(summary.values()) > 0
assert summary["fail"] == 0 and summary["error"] == 0
assert result.returncode == 0
=== END AC text-004-date-conformance ===

=== AC text-004-utc ===
Intent: The selected corpus exercises both ISO convenience filters and low-level UTC conversions.
Suite: scoped
Requires: executable=python3; scope=test

import json
import os
import subprocess
import sys

selector = r"fromdate|todate|strptime|strftime|gmtime|mktime"
result = subprocess.run(
    [sys.executable, "sources/run_conformance.py", "--select", selector, "--json"],
    capture_output=True,
    text=True,
    env={**os.environ, "JQ": f"{os.getcwd()}/jq"},
)
print(result.stdout)
print(result.stderr, file=sys.stderr)
report = json.loads(result.stdout)
summary = report["summary"]
assert sum(summary.values()) > 0
assert summary["fail"] == 0 and summary["error"] == 0
assert result.returncode == 0
=== END AC text-004-utc ===

## User Acceptance

- None.

## Guardrails

- Date operations must use standard-library facilities and must not depend on the local timezone for UTC filters.
- Do not introduce wall-clock-dependent acceptance expectations.
=== END ARTIFACT ===
=== BEGIN ARTIFACT FEATURE-IO-001.md ===
# FEATURE: Input Stream Controls

| Field       | Value |
|-------------|-------|
| Version     | 20260822 V1 |
| Description | Provide jq input stream controls over the fixed standard-input interface. |
| Depends On  | ARCHITECTURE.md, FEATURE-TEXT-004.md |
| Provides    | input, inputs, input_filename, input_line_number |
| Consumes    | JSON stdin reader |

## Questions

- None.

## Workflow

Expose the remaining JSON values from the process input stream through `input` and `inputs`, while preserving the already-selected current input and generator ordering. Provide the fixed-interface filename and line-number primitives required by the corpus.

## Programmatic Acceptance

=== AC io-001-input-conformance ===
Intent: The authoritative corpus cases covering input stream controls execute and pass.
Suite: scoped
Requires: executable=python3; scope=test

import json
import os
import subprocess
import sys

selector = r"input|inputs|input_filename|input_line_number"
result = subprocess.run(
    [sys.executable, "sources/run_conformance.py", "--select", selector, "--json"],
    capture_output=True,
    text=True,
    env={**os.environ, "JQ": f"{os.getcwd()}/jq"},
)
print(result.stdout)
print(result.stderr, file=sys.stderr)
report = json.loads(result.stdout)
summary = report["summary"]
assert sum(summary.values()) > 0
assert summary["fail"] == 0 and summary["error"] == 0
assert result.returncode == 0
=== END AC io-001-input-conformance ===

=== AC io-001-streams ===
Intent: The selected corpus includes both single-next-input and remaining-input stream behavior.
Suite: scoped
Requires: executable=python3; scope=test

import json
import os
import subprocess
import sys

selector = r"\binput\b|\binputs\b"
result = subprocess.run(
    [sys.executable, "sources/run_conformance.py", "--select", selector, "--json"],
    capture_output=True,
    text=True,
    env={**os.environ, "JQ": f"{os.getcwd()}/jq"},
)
print(result.stdout)
print(result.stderr, file=sys.stderr)
report = json.loads(result.stdout)
summary = report["summary"]
assert sum(summary.values()) > 0
assert summary["fail"] == 0 and summary["error"] == 0
assert result.returncode == 0
=== END AC io-001-streams ===

## User Acceptance

- None.

## Guardrails

- Read only the fixed standard input stream; do not add command-line input modes.
- Preserve the distinction between the current input and remaining inputs.
=== END ARTIFACT ===
=== BEGIN ARTIFACT FEATURE-IO-002.md ===
# FEATURE: Diagnostics and Standard Error Output

| Field       | Value |
|-------------|-------|
| Version     | 20260822 V1 |
| Description | Provide jq diagnostic filters and controlled standard-error behavior. |
| Depends On  | ARCHITECTURE.md, FEATURE-IO-001.md, FEATURE-EXEC-002.md |
| Provides    | debug, stderr, halt_error |
| Consumes     | process exit and diagnostic contract |

## Questions

- None.

## Workflow

Implement `debug` and `stderr` as side-effecting filters that preserve the required value stream, and implement `halt_error` with its documented stderr emission and exit behavior. Keep diagnostic output separate from JSON values written to stdout.

## Programmatic Acceptance

=== AC io-002-diagnostics-conformance ===
Intent: The authoritative corpus cases covering debug, stderr, and halt_error execute and pass.
Suite: scoped
Requires: executable=python3; scope=test

import json
import os
import subprocess
import sys

selector = r"debug|stderr|halt_error"
result = subprocess.run(
    [sys.executable, "sources/run_conformance.py", "--select", selector, "--json"],
    capture_output=True,
    text=True,
    env={**os.environ, "JQ": f"{os.getcwd()}/jq"},
)
print(result.stdout)
print(result.stderr, file=sys.stderr)
report = json.loads(result.stdout)
summary = report["summary"]
assert sum(summary.values()) > 0
assert summary["fail"] == 0 and summary["error"] == 0
assert result.returncode == 0
=== END AC io-002-diagnostics-conformance ===

=== AC io-002-channels ===
Intent: The selected corpus exercises diagnostic filters while the conformance runner observes the declared process contract.
Suite: scoped
Requires: executable=python3; scope=test

import json
import os
import subprocess
import sys

selector = r"debug|stderr|halt_error"
result = subprocess.run(
    [sys.executable, "sources/run_conformance.py", "--select", selector, "--json"],
    capture_output=True,
    text=True,
    env={**os.environ, "JQ": f"{os.getcwd()}/jq"},
)
print(result.stdout)
print(result.stderr, file=sys.stderr)
report = json.loads(result.stdout)
summary = report["summary"]
assert sum(summary.values()) > 0
assert summary["fail"] == 0 and summary["error"] == 0
assert result.returncode == 0
=== END AC io-002-channels ===

## User Acceptance

- None.

## Guardrails

- Diagnostics must never be emitted as JSON values on stdout.
- Do not assert diagnostic message wording; preserve only the documented channels and exit semantics.
=== END ARTIFACT ===