=== BEGIN ARTIFACT FEATURE-Streaming-Transformations.md ===
# FEATURE: Streaming Transformations

| Field       | Value |
|-------------|-------|
| Version     | 20260822 V1 |
| Description | Implement jq streaming conversion and truncation filters over the fixed process boundary. |
| Depends On  | FEATURE-Path-Discovery.md, FEATURE-Generator-Core.md, FEATURE-Collection-Transformations.md |
| Provides    | tostream, fromstream, truncate_stream |
| Consumes    | ordered generators, path discovery, JSON values |

## Questions

- None.

## Purpose

Implement the streaming value representation described by the jq manual while retaining the fixed non-streaming CLI interface. `tostream` emits path/value stream records, `fromstream` reconstructs values, and `truncate_stream` removes leading path components.

## Behavior

- `tostream` emits stream records in jq traversal order, including container termination records.
- `fromstream` reconstructs arrays, objects, scalars, empty containers, and multiple streamed values.
- `truncate_stream` consumes an integer depth and emits records with that many leading path components removed.
- Invalid stream structures and invalid truncation depths follow jq runtime-error behavior.
- The implementation uses only the standard library and preserves generator ordering.

## Programmatic Acceptance

=== AC streaming-conformance ===
Intent: The streaming filters pass the executed conformance cases selected by their syntax.
Suite: scoped
Requires: executable=python3; scope=test

import json
import os
import subprocess
import sys

select = r"tostream|fromstream|truncate_stream"
result = subprocess.run(
    [sys.executable, "sources/run_conformance.py", "--select", select, "--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
assert summary["error"] == 0
assert result.returncode == 0
=== END AC streaming-conformance ===

=== AC streaming-roundtrip ===
Intent: A streamed value can be reconstructed without changing its value.
import json
import os
import subprocess

source = "[0,[1,{\"a\":2}]]"
program = ". as $dot | fromstream($dot|tostream) | . == $dot"
result = subprocess.run(
    ["./jq", "-c", program],
    input=source + "\n",
    capture_output=True,
    text=True,
)
assert result.returncode == 0
actual = [json.loads(line) for line in result.stdout.splitlines()]
expected = [True]
assert actual == expected
=== END AC streaming-roundtrip ===

=== AC streaming-truncation ===
Intent: Truncating a stream removes the requested leading path depth.
import json
import subprocess

stream = "[[0],\"a\"],[[1,0],\"b\"],[[1,0]],[[1]]"
program = "truncate_stream(1|[[0],\"a\"],[[1,0],\"b\"],[[1,0]],[[1]])"
result = subprocess.run(
    ["./jq", "-c", program],
    input="1\n",
    capture_output=True,
    text=True,
)
assert result.returncode == 0
actual = [json.loads(line) for line in result.stdout.splitlines()]
expected = [[[0], "b"], [[0]]]
assert actual == expected
=== END AC streaming-truncation ===

## User Acceptance

- None.

## Guardrails

- Do not add a streaming command-line mode; these filters operate within the fixed `-c` interface.
- Do not shell out to jq or use a third-party implementation.
- Preserve stream record order and multiplicity.
- Do not modify files under `sources/`.

=== END ARTIFACT ===
=== BEGIN ARTIFACT FEATURE-Conformance-Asset-Staging.md ===
# FEATURE: Conformance Asset Staging

| Field       | Value |
|-------------|-------|
| Version     | 20260822 V1 |
| Description | Stage and validate the immutable jq conformance assets required by the build. |
| Depends On  | — |
| Provides    | staged sources/* assets, parsed corpus and exclusions |
| Consumes    | — |

## Questions

- None.

## Purpose

Make the supplied manual, corpus, parser and lexer references, builtin reference, exclusions, runner, and full-test script available under `sources/` in the application root without modification.

## Behavior

- All imported source assets are copied byte-for-byte to their declared `sources/` paths.
- The supplied harness imports successfully.
- The corpus parses into its authoritative case set.
- Every exclusion matches at least one corpus case.
- This story validates staging only and does not execute candidate conformance cases.

## Programmatic Acceptance

=== AC staging-assets ===
Intent: The staged harness parses the corpus and applies every declared exclusion successfully.
import sys

sys.path.insert(0, "sources")
import run_conformance as harness

cases = harness.parse_corpus(harness.CORPUS.read_text(encoding="utf-8"))
excluded = harness.apply_exclusions(
    cases,
    harness.parse_exclusions(harness.EXCLUSIONS),
)
assert len(cases) == 550
assert len(excluded) == 13
=== END AC staging-assets ===

=== AC staging-harness-import ===
Intent: The staged harness exposes the required corpus and exclusion paths.
from pathlib import Path
import sys

sys.path.insert(0, "sources")
import run_conformance as harness

assert harness.CORPUS.is_file()
assert harness.EXCLUSIONS.is_file()
assert Path("sources/full_test.sh").is_file()
assert Path("sources/jq.test").is_file()
=== END AC staging-harness-import ===

=== AC staging-readonly-assets ===
Intent: The staged scoring assets retain their required executable and readable forms.
from pathlib import Path

assert Path("sources/full_test.sh").stat().st_mode & 0o111
assert Path("sources/run_conformance.py").read_text(encoding="utf-8")
assert Path("sources/jq-manual.txt").read_text(encoding="utf-8")
assert Path("sources/parser.y").read_text(encoding="utf-8")
assert Path("sources/lexer.l").read_text(encoding="utf-8")
=== END AC staging-readonly-assets ===

## User Acceptance

- None.

## Guardrails

- Never modify, trim, regenerate, or substitute any file under `sources/`.
- Do not launch the conformance harness from this staging story.
- Preserve the supplied corpus and exclusion data verbatim.
- The staged assets are read-only scoring inputs.

=== END ARTIFACT ===
=== BEGIN ARTIFACT FEATURE-Scoped-Conformance-Verification.md ===
# FEATURE: Scoped Conformance Verification

| Field       | Value |
|-------------|-------|
| Version     | 20260822 V1 |
| Description | Provide construct-scoped execution of the supplied jq conformance harness. |
| Depends On  | FEATURE-Executable-Entry-Point.md, FEATURE-Process-Contract.md, FEATURE-Conformance-Asset-Staging.md |
| Provides    | scoped conformance execution contract |
| Consumes    | executable jq, staged conformance assets |

## Questions

- None.

## Purpose

Ensure implementation stories can execute only the corpus slice corresponding to the capability under construction, using the supplied runner and its machine-readable report.

## Behavior

- Each scoped invocation supplies `JQ` while preserving the inherited environment.
- Selectors match actual jq program syntax and execute selected cases.
- Acceptance reads the parsed JSON summary rather than scraping human-readable output.
- A valid scoped run requires a nonzero selected case count, zero failures, zero errors, and exit status zero.
- The unfiltered corpus remains reserved for the terminal verification story.

## Programmatic Acceptance

=== AC scoped-runner-contract ===
Intent: The supplied runner executes a nonempty scoped slice and reports a clean result.
import json
import os
import subprocess
import sys

select = r"reduce"
result = subprocess.run(
    [sys.executable, "sources/run_conformance.py", "--select", select, "--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
assert summary["error"] == 0
assert result.returncode == 0
=== END AC scoped-runner-contract ===

=== AC scoped-selector-executes ===
Intent: A syntax selector identifies executable corpus cases rather than merely enumerating them.
import json
import os
import subprocess
import sys

select = r"try |error|\?"
result = subprocess.run(
    [sys.executable, "sources/run_conformance.py", "--select", select, "--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
assert summary["error"] == 0
assert result.returncode == 0
=== END AC scoped-selector-executes ===

=== AC scoped-environment-preserved ===
Intent: A scoped invocation supplies JQ without discarding the inherited execution environment.
import json
import os
import subprocess
import sys

result = subprocess.run(
    [sys.executable, "sources/run_conformance.py", "--select", r"^(true|false|null|1)$", "--json"],
    capture_output=True,
    text=True,
    env={**os.environ, "JQ": f"{os.getcwd()}/jq"},
)
report = json.loads(result.stdout)
summary = report["summary"]
assert sum(summary.values()) > 0
assert summary["fail"] == 0
assert summary["error"] == 0
assert result.returncode == 0
=== END AC scoped-environment-preserved ===

## User Acceptance

- None.

## Guardrails

- Never use enumeration or dry-run mode as a behavioral acceptance gate.
- Never invoke the unfiltered corpus from this story.
- Never assert against printed summary text; parse the JSON report.
- Never replace the inherited environment when setting `JQ`.
- Do not modify supplied harness assets.

=== END ARTIFACT ===
=== BEGIN ARTIFACT FEATURE-Complete-Conformance-Verification.md ===
# FEATURE: Complete Conformance Verification

| Field       | Value |
|-------------|-------|
| Version     | 20260822 V1 |
| Description | Verify the completed interpreter against the entire supplied jq conformance corpus. |
| Depends On  | ARCHITECTURE.md, FEATURE-Executable-Entry-Point.md, FEATURE-Process-Contract.md, FEATURE-JSON-IO-Boundary.md, FEATURE-Lexer.md, FEATURE-Literals-And-Interpolation.md, FEATURE-Filter-Grammar.md, FEATURE-Declarations-And-Control-Syntax.md, FEATURE-Generator-Core.md, FEATURE-Composition-And-Cartesian-Evaluation.md, FEATURE-Errors-And-Optional-Evaluation.md, FEATURE-Truthiness-And-Comparison.md, FEATURE-Value-Model.md, FEATURE-Field-And-Index-Access.md, FEATURE-Slices-And-Iteration.md, FEATURE-Type-And-Numeric-Primitives.md, FEATURE-Arithmetic-And-Structural-Operators.md, FEATURE-Boolean-And-Alternative-Operators.md, FEATURE-Conditionals-And-Exception-Flow.md, FEATURE-Labels-And-Breaks.md, FEATURE-Reductions-And-Iteration-Control.md, FEATURE-Recursive-Generators.md, FEATURE-Variable-Bindings.md, FEATURE-Function-Parameters.md, FEATURE-Function-Definitions-And-Recursion.md, FEATURE-Destructuring-Patterns.md, FEATURE-Path-Discovery.md, FEATURE-Path-Primitives.md, FEATURE-Deletion-And-Assignment.md, FEATURE-Complex-Assignment-Edges.md, FEATURE-Collection-Transformations.md, FEATURE-Sorting-And-Grouping.md, FEATURE-Object-Entries-And-Containment.md, FEATURE-Index-And-Membership-Utilities.md, FEATURE-String-Manipulation.md, FEATURE-JSON-And-Output-Formats.md, FEATURE-Regular-Expressions.md, FEATURE-Date-And-Time-Filters.md, FEATURE-Input-Streams.md, FEATURE-Diagnostics-And-Stderr.md, FEATURE-Streaming-Transformations.md, FEATURE-Conformance-Asset-Staging.md, FEATURE-Scoped-Conformance-Verification.md |
| Provides    | complete conformance release verification |
| Consumes    | executable jq, all interpreter capabilities, staged conformance assets |

## Questions

- None.

## Purpose

Run the supplied scoring entry point once the complete interpreter is assembled. This is the terminal verification story and the project-level technical acceptance gate.

## Behavior

- `sources/full_test.sh` verifies that `./jq` is executable.
- The script invokes the supplied conformance runner over the complete corpus.
- The candidate must return zero for every executed valid case and exit 3 for every marked compile failure.
- Declared module-loader exclusions remain skipped by the supplied exclusion list.
- The story does not modify, filter, reinterpret, or replace the scoring assets.

## Programmatic Acceptance

=== AC complete-conformance ===
Intent: The completed executable passes the supplied full jq conformance suite.
Suite: full
Requires: executable=sh; scope=test
Requires: executable=python3; scope=test

import os
import subprocess

result = subprocess.run(
    ["sh", "sources/full_test.sh"],
    capture_output=True,
    text=True,
    env={**os.environ},
)
print(result.stdout)
print(result.stderr, file=os.sys.stderr)
assert result.returncode == 0
=== END AC complete-conformance ===

=== AC executable-interface-final ===
Intent: The final executable accepts the fixed compact filter interface and completes successfully.
import json
import subprocess

program = "."
payload = '{"status":"ready"}\n'
result = subprocess.run(
    ["./jq", "-c", program],
    input=payload,
    capture_output=True,
    text=True,
)
assert result.returncode == 0
actual = [json.loads(line) for line in result.stdout.splitlines()]
expected = [json.loads(payload)]
assert actual == expected
=== END AC executable-interface-final ===

## User Acceptance

- None.

## Guardrails

- This is the only story permitted to invoke `sh sources/full_test.sh`.
- It is terminal and depends on every implementation and conformance story.
- Do not add selectors, skips, output reinterpretation, or exit-code substitution.
- Do not modify any file under `sources/`.
- The full-suite exit status is the acceptance verdict; diagnostics are for evidence only.

=== END ARTIFACT ===