Create public Gradio frontend with private core submodule

.dockerignore

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+**
+!Dockerfile
+!README.md
+!requirements-runtime.txt
+!core-revision.json
+!demo/
+!demo/**
+!examples/
+!examples/**
+!bootstrap.py
+**/__pycache__/

.gitignore

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+__pycache__/
+.pytest_cache/
+.venv/
+build/
+dist/
+*.egg-info/

.gitmodules

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+[submodule "core"]
+	path = core
+	url = https://github.com/edmcman/decompile-verify.git

.python-version

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+3.11.13

Dockerfile

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+FROM ghcr.io/astral-sh/uv:0.12.19@sha256:04d046b13e60d6bcec73cbc5e1cad25d680dea90c8573340950a0ac2d1aef424 AS uv
+FROM ubuntu:24.04@sha256:a853f94d226358a79c740cfc7bce0c289748f3fe3488d921d038ccd752c61b60
+
+RUN apt-get update && \
+    DEBIAN_FRONTEND=noninteractive apt-get install --no-install-recommends -y \
+      ca-certificates git gcc g++ clang binutils make && \
+    dpkg-query -W > /opt/apt-packages.txt && rm -rf /var/lib/apt/lists/*
+COPY --from=uv /uv /uvx /usr/local/bin/
+ENV UV_PYTHON_INSTALL_DIR=/opt/python UV_LINK_MODE=copy
+RUN useradd -o -m -u 1000 user && \
+    uv python install 3.11.13 && uv venv --python 3.11.13 /opt/venv && \
+    chown -R user:user /opt/venv
+COPY requirements-runtime.txt /opt/requirements-runtime.txt
+USER user
+ENV HOME=/home/user UV_CACHE_DIR=/home/user/.cache/uv
+RUN --mount=type=cache,id=decompile-verify-gradio-uv,target=/home/user/.cache/uv,uid=1000,gid=1000 \
+    uv pip sync --python /opt/venv/bin/python --require-hashes /opt/requirements-runtime.txt
+ENV PATH="/opt/venv/bin:$PATH" PYTHONHASHSEED=0 PYTHONUNBUFFERED=1 GRADIO_ANALYTICS_ENABLED=False
+WORKDIR /home/user/app
+# Do not COPY the build context as a whole: it may have an initialized private submodule.
+COPY --chown=user:user demo/ ./demo/
+COPY --chown=user:user examples/ ./examples/
+COPY --chown=user:user bootstrap.py core-revision.json ./
+EXPOSE 7860
+CMD ["python", "bootstrap.py"]

README.md

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+---
+title: Decompiler verifier
+emoji: 🔍
+colorFrom: indigo
+colorTo: blue
+sdk: docker
+app_port: 7860
+fullWidth: true
+---
+
+# Decompiler verifier workbench
+
+Public Gradio frontend for comparing a binary function with candidate C. Select
+an example or upload an ELF x86-64 binary, supply its function address and candidate
+source, and stream verification results with assembly previews and a JSON download.
+The application includes all 45 synthetic, saved Ghidra, and real-binary examples.
+
+The verification library is a private GitHub repository referenced by the `core/`
+Git submodule. This repository publishes the UI and demo assets. Running verification
+locally requires access to the private core; cloning the public frontend alone does
+not grant that access.
+
+## Local development
+
+Use Linux/amd64, Python 3.11.13, GCC, Clang, and binutils. On macOS or Windows,
+use the Docker workflow below. With authorized GitHub credentials:
+
+```sh
+git submodule update --init core
+uv sync --locked
+uv run python -m demo.app
+uv run python -m pytest -q
+```
+
+Open <http://localhost:7860>. The library is installed as an editable dependency
+from the submodule. UI tests operate on public assets and the installed library;
+they do not import the private engine tests. Core regression tests run separately
+in the core project.
+
+## Docker and Hugging Face
+
+```sh
+docker build --platform linux/amd64 -t decompile-verify:gradio .
+docker run --rm --platform linux/amd64 --publish 127.0.0.1:7860:7860 \
+  --env CORE_GITHUB_TOKEN decompile-verify:gradio
+```
+
+Set `CORE_GITHUB_TOKEN` in your local environment using your credential manager
+before running the command; do not write its value into shell history. In the
+Space Settings, configure the same name as a secret. Use a GitHub token scoped
+to the private core repository with read-only Contents permission.
+
+The public image contains third-party dependencies, UI code, and example assets.
+It excludes the private submodule even when initialized locally. At startup,
+`bootstrap.py` fetches the pinned core commit, verifies it, installs the library,
+deletes the temporary checkout, removes the token from the application environment,
+and launches Gradio on port 7860. Startup fails clearly if credentials or the pinned
+revision are unavailable. This requires network access to GitHub at startup.
+The installed core exists only in the running container, outside the published image.
+uv uses a BuildKit cache mount for dependency downloads and builds; that cache is
+reused across builds and does not become part of the published image.
+
+Uploads and downloaded reports are ephemeral. Gradio blocks file serving from
+the private library, development submodule, and Git metadata. The workbench preserves
+queued streaming, cancellation, editable settings, and deterministic JSON reports.
+
+## Update the core revision
+
+Commit and push library changes in the private core repository first. Update the
+submodule to that committed revision, then regenerate pin metadata and dependencies:
+
+```sh
+git -C core fetch origin
+git -C core checkout CORE_COMMIT
+uv run --no-sync python scripts/pin_core.py
+```
+
+Commit `core`, `core-revision.json`, `uv.lock`, and `requirements-runtime.txt`
+together. The private core stays on GitHub; only its gitlink is published here.
+The Docker build installs the hashed requirements without authenticating to GitHub.
+
+Examples are prepared in the private core's Linux container with
+`python -m scripts.export_demo_examples --out build/public-examples` and copied
+into `examples/`. Startup does not compile original example sources or require
+the core's test tree. Reference C is a display aid; uploaded binaries have none.
+The bundled `factor` executable retains its redistribution notices in `examples/`.
+
+## Publish under the existing Space name
+
+The old private `ejschwartz/decompile-verify` Space contains core source and history.
+Do not make it public directly. Back it up privately, then create a clean replacement
+at the same name and push only this repository's fresh history. Configure secrets,
+validate the app and all image layers while private, and verify old core-containing
+commits and images are inaccessible before publishing. Replacing the Space requires
+separate approval because it interrupts the current app and removes its history/settings.
+
+See [Docker Space secrets](https://huggingface.co/docs/hub/spaces-sdks-docker#secrets-and-variables-management)
+and [downloadable Space images](https://huggingface.co/docs/hub/spaces-run-with-docker).
+
+To inspect every image layer for private core files and repository metadata, run
+`python scripts/audit_image.py decompile-verify:gradio`. The audit recognizes uv's
+empty cache sentinel as installer metadata rather than a project Git repository.

bootstrap.py

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+"""Install the pinned private submodule at runtime, before importing Gradio."""
+
+import argparse
+import json
+import os
+from pathlib import Path
+import re
+import subprocess
+import sys
+import tempfile
+
+ROOT = Path(__file__).resolve().parent
+REPOSITORY = "https://github.com/edmcman/decompile-verify.git"
+
+
+def revision():
+    data = json.loads((ROOT / "core-revision.json").read_text())
+    if data["repository"] != REPOSITORY or not re.fullmatch(r"[0-9a-f]{40}", data["commit"]):
+        raise ValueError("invalid pinned core repository or commit")
+    return data
+
+
+def command(args, *, env=None, cwd=None, timeout=300):
+    try:
+        return subprocess.run(args, cwd=cwd, env=env, check=True, capture_output=True,
+                              text=True, timeout=timeout).stdout.strip()
+    except (subprocess.CalledProcessError, subprocess.TimeoutExpired, OSError) as error:
+        # Never emit raw Git output or the authentication environment into Space logs.
+        raise RuntimeError(f"private core setup failed during {Path(args[0]).name}; "
+                           "check repository access, pinned commit, and network availability") from error
+
+
+def install_core():
+    pinned = revision()
+    token = os.environ.pop("CORE_GITHUB_TOKEN", None)
+    if not token:
+        raise RuntimeError("set the CORE_GITHUB_TOKEN Space secret to a read-only GitHub token")
+    clean_env = {key: value for key, value in os.environ.items()
+                 if not key.startswith("GIT_")}
+    clean_env["GIT_TERMINAL_PROMPT"] = "0"
+    clean_env["GIT_CONFIG_GLOBAL"] = os.devnull
+    clean_env["GIT_CONFIG_NOSYSTEM"] = "1"
+    # An ephemeral askpass helper supplies the credential without storing it in
+    # a URL, git config, command line, or the environment of the running app.
+    with tempfile.TemporaryDirectory(prefix="private-core-") as temporary:
+        directory = Path(temporary)
+        askpass = directory / "askpass.py"
+        askpass.write_text(f"#!{sys.executable}\nimport os, sys\n"
+                           "print('x-access-token' if 'username' in sys.argv[1].lower() "
+                           "else os.environ['CORE_GITHUB_TOKEN'])\n")
+        askpass.chmod(0o700)
+        git_env = {**clean_env, "GIT_ASKPASS": str(askpass), "CORE_GITHUB_TOKEN": token}
+        # Disable credential helpers so no persistent credential is read or saved.
+        git_env.update(GIT_CONFIG_COUNT="1", GIT_CONFIG_KEY_0="credential.helper", GIT_CONFIG_VALUE_0="")
+        source = directory / "source"
+        source.mkdir()
+        command(["git", "init", "--quiet", str(source)], env=clean_env)
+        command(["git", "remote", "add", "origin", REPOSITORY], env=clean_env, cwd=source)
+        command(["git", "fetch", "--quiet", "--depth=1", "origin", pinned["commit"]], env=git_env, cwd=source)
+        fetched = command(["git", "rev-parse", "FETCH_HEAD"], env=clean_env, cwd=source)
+        if fetched != pinned["commit"]:
+            raise RuntimeError("fetched core revision differs from the pinned submodule")
+        command(["git", "checkout", "--quiet", "--detach", "FETCH_HEAD"], env=clean_env, cwd=source)
+        git_env.clear()
+        token = None
+        command(["uv", "pip", "install", "--python", sys.executable,
+                 "--no-deps", "--no-build-isolation", str(source)], env=clean_env)
+    from importlib.metadata import version
+    if version("decompile-verify") != pinned["version"]:
+        raise RuntimeError("installed core version differs from the pinned metadata")
+
+
+def main():
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument("--install-only", action="store_true")
+    args = parser.parse_args()
+    try:
+        install_core()
+    except (RuntimeError, ValueError, KeyError, OSError) as error:
+        print(str(error), file=sys.stderr)
+        return 1
+    if not args.install_only:
+        os.execv(sys.executable, [sys.executable, "-m", "demo.app", "--host", "0.0.0.0", "--port", "7860"])
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

core

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+Subproject commit bdc8d4af1f3a26294cbca5bb094b7308b98859bd

core-revision.json

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+{
+  "repository": "https://github.com/edmcman/decompile-verify.git",
+  "commit": "bdc8d4af1f3a26294cbca5bb094b7308b98859bd",
+  "version": "0.0.0"
+}

demo/__init__.py

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+"""Gradio front end; verification is owned by verifier.api."""

demo/app.py

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+"""Local Gradio demo. Run inside the Linux x86-64 Docker environment."""
+
+import argparse
+from contextlib import closing
+from dataclasses import asdict
+from hashlib import sha256
+from decimal import Decimal
+import re
+from pathlib import Path
+import verifier
+import shlex
+import tempfile
+
+import gradio as gr
+
+from demo.examples import EXAMPLE_LABELS, ROOT, prepare_examples, reference_sources
+from demo.presentation import banner, format_bit_ranges, json_detail, mismatch_summary, status
+from demo.session import (UISession, begin_ui, cancel_session, controls, edit_inputs, idle_controls,
+                          reset_session, stream_ui)
+import verifier as api
+from verifier import Task, integer_text, parse_bindings, parse_function, yaml_mapping
+
+HEADERS = ["Seed", "Verdict", "Location", "Differing bits", "Original", "Candidate", "Reason"]
+
+
+def integer(value, label):
+    if type(value) is int:
+        return value
+    if isinstance(value, float) and value.is_integer():
+        return int(value)
+    if isinstance(value, str):
+        try:
+            if value.strip().lower().startswith("0x"):
+                return int(value.strip(), 16)
+            if re.fullmatch(r"[+-]?[0-9]+", value.strip()):
+                return int(Decimal(value.strip()))
+        except ValueError:
+            pass
+    raise ValueError(f"{label} must be an integer")
+
+
+def result_row(result):
+    diff = result.difference
+    bits = format_bit_ranges((span.first, span.last) for span in getattr(diff, "bit_ranges", ()))
+    original, candidate = getattr(diff, "original", ""), getattr(diff, "candidate", "")
+    if isinstance(original, int):
+        original, candidate = hex(original), hex(candidate)
+    return [integer_text(result.seed), result.verdict, getattr(diff, "location", ""), bits,
+            original, candidate, result.reason or result.original.reason or result.candidate.reason or ""]
+
+
+def task_from_inputs(binary, function, candidate, bindings, candidate_symbol,
+                     seed_count, seed_start, instruction_budget, compiler, flags, interfaces=""):
+    if not binary:
+        raise ValueError("upload a binary or select an example")
+    options = yaml_mapping(interfaces or "")
+    allowed = {"original_prototype", "original_cc", "candidate_cc", "variadic_types", "callee_interfaces", "memory_ranges", "original_base"}
+    if set(options) - allowed:
+        raise ValueError("unknown interface settings: " + ", ".join(sorted(set(options) - allowed)))
+    return Task(binary=Path(binary), function=parse_function(function), candidate=candidate,
+                bindings=parse_bindings(bindings), candidate_symbol=candidate_symbol.strip(),
+                seed_count=integer(seed_count, "seed count"), seed_start=integer(seed_start, "seed start"),
+                instruction_budget=integer(instruction_budget, "instruction budget"),
+                compiler=compiler, flags=tuple(shlex.split(flags)), **options)
+
+
+def clear_outputs():
+    return "", [], None, None, "", ""
+
+
+def show_assembly(binary, function, candidate, bindings, candidate_symbol,
+                  seed_count, seed_start, instruction_budget, compiler, flags, interfaces=""):
+    try:
+        report = api.inspect(task_from_inputs(binary, function, candidate, bindings, candidate_symbol,
+                                              seed_count, seed_start, instruction_budget, compiler, flags, interfaces))
+        yield banner(report, preview=True), [], None, None, report.original_assembly, report.candidate_assembly
+    except (ValueError, OSError) as error:
+        raise gr.Error(str(error)) from error
+
+
+def run_verification(binary, function, candidate, bindings, candidate_symbol,
+                     seed_count, seed_start, instruction_budget, compiler, flags, interfaces="", *, report_directory=None):
+    """Translate UI inputs, stream engine results, then supply the JSON download."""
+    try:
+        task = task_from_inputs(binary, function, candidate, bindings, candidate_symbol,
+                                seed_count, seed_start, instruction_budget, compiler, flags, interfaces)
+        rows, detail = [], None
+        with closing(api.verify(task, stream=True)) as iterator:
+            for report in iterator:
+                rows.append(result_row(report.results[-1]))
+                if detail is None and report.first_mismatch is not None:
+                    detail = asdict(report.first_mismatch)
+                yield banner(report), list(rows), detail, None, report.original_assembly, report.candidate_assembly
+        output = report.to_json()
+        directory = Path(report_directory) if report_directory else Path(tempfile.gettempdir()) / "decompile-verify-reports"
+        directory.mkdir(parents=True, exist_ok=True)
+        path = directory / (sha256(output.encode()).hexdigest() + ".json")
+        # Atomic writes allow concurrent requests for the same deterministic report.
+        with tempfile.NamedTemporaryFile(mode="w", dir=directory, delete=False) as stream:
+            stream.write(output)
+            temporary = Path(stream.name)
+        temporary.replace(path)
+        yield banner(report, complete=True), rows, detail, str(path), report.original_assembly, report.candidate_assembly
+    except (ValueError, OSError) as error:
+        raise gr.Error(str(error)) from error
+
+
+class Workbench(gr.Blocks):
+    """Apply the workbench theme even when a caller launches create_app() directly."""
+
+    def launch(self, **kwargs):
+        kwargs.setdefault("theme", gr.themes.Base(
+            primary_hue="teal", secondary_hue="teal", neutral_hue="slate",
+            font=["system-ui", "sans-serif"], font_mono=["ui-monospace", "monospace"],
+        ))
+        kwargs.setdefault("css_paths", Path(__file__).with_name("workbench.css"))
+        kwargs.setdefault("js", Path(__file__).with_name("workbench.js").read_text())
+        blocked = list(kwargs.pop("blocked_paths", ()) or ())
+        blocked.extend([str(Path(verifier.__file__).resolve().parent),
+                        str(ROOT / "core"), str(ROOT / ".git")])
+        kwargs["blocked_paths"] = blocked
+        return super().launch(**kwargs)
+
+
+def create_app(examples_directory=None):
+    examples = prepare_examples(examples_directory or ROOT / "build" / "demo-examples")
+    references = reference_sources()
+    with Workbench(title="Decompiler verifier", analytics_enabled=False,
+                   fill_width=True, delete_cache=(3600, 86400)) as app:
+        session = gr.State(UISession())
+        ticket = gr.State(None)
+        reference_function = gr.State(None)
+        gr.Markdown("# Decompiler verifier\nCompare a C candidate with a binary function across shared random seeds.",
+                    elem_id="intro")
+        # Render inputs later so the example picker can sit above setup.
+        binary = gr.File(label="Binary", type="filepath", file_count="single", render=False, elem_id="binary")
+        function = gr.Textbox(label="Function start address", placeholder="0x401000",
+                              info="angr recovers the function's blocks using available symbols and control flow.", render=False)
+        candidate_symbol = gr.Textbox(label="Candidate function name", value="target", render=False)
+        candidate = gr.Code(label="Candidate C", language="c", lines=20, wrap_lines=False,
+                            buttons=["copy"], render=False, elem_id="candidate-source")
+        bindings = gr.Code(label="Bindings (YAML)", language="yaml", lines=4,
+                           value="globals: {}\ncallees: {}\n", render=False)
+        seed_count = gr.Number(label="Seed count", value=100, precision=0, minimum=1, render=False)
+        seed_start = gr.Textbox(label="First seed", value="0", info="Nonnegative decimal or hex integer", render=False)
+        instruction_budget = gr.Number(label="Instruction budget per run", value=100000, precision=0,
+                                       minimum=1, render=False)
+        compiler = gr.Dropdown(label="Candidate compiler", choices=["gcc", "clang"], value="gcc", render=False)
+        flags = gr.Textbox(label="Candidate flags", value="-O2",
+                           info="Optimization/debug flags and selected C options; see docs/demo.md.", render=False)
+        interfaces = gr.Code(label="Function interfaces and explicit memory ranges (YAML)", language="yaml",
+                             value="", lines=5, render=False)
+        inputs = [binary, function, candidate, bindings, candidate_symbol,
+                  seed_count, seed_start, instruction_budget, compiler, flags, interfaces]
+        example_picker = gr.Examples(examples=examples, inputs=inputs, label="Examples",
+                                     example_labels=list(EXAMPLE_LABELS),
+                                     examples_per_page=20,
+                                     cache_examples=False, elem_id="examples")
+        with gr.Row(elem_id="setup"):
+            binary.render()
+            function.render()
+            candidate_symbol.render()
+        with gr.Accordion("Bindings", open=False):
+            bindings.render()
+            interfaces.render()
+        with gr.Accordion("Run settings", open=False):
+            with gr.Row():
+                seed_count.render()
+                seed_start.render()
+                instruction_budget.render()
+                compiler.render()
+                flags.render()
+        with gr.Row(elem_id="actions"):
+            run = gr.Button("Verify", variant="primary")
+            cancel = gr.Button("Cancel", interactive=False)
+        verdict = gr.HTML(status("Ready · Choose an example or upload a binary"), elem_id="verdict",
+                          apply_default_css=False)
+        with gr.Row(elem_id="workspace") as workspace:
+            candidate.render()
+            reference = gr.Code(label="Reference C", language="c", lines=20,
+                                interactive=False, wrap_lines=False, buttons=["copy"],
+                                visible=False, elem_id="reference-source")
+            original_assembly = gr.Code(label="Original assembly", language=None, lines=20,
+                                        interactive=False, wrap_lines=False, buttons=["copy"],
+                                        show_line_numbers=False, elem_id="original-assembly")
+            candidate_assembly = gr.Code(label="Candidate assembly", language=None, lines=20,
+                                         interactive=False, wrap_lines=False, buttons=["copy"],
+                                         show_line_numbers=False, elem_id="candidate-assembly")
+        gr.Markdown("Compares ordered calls, non-frame memory at calls and return, typed returns, "
+                    "and termination. Bound callees use declared signatures and deterministic "
+                    "synthetic returns without memory effects. Frame-observing and unsupported "
+                    "calls are inconclusive.", elem_id="scope")
+        with gr.Row(elem_id="results"):
+            table = gr.Dataframe(headers=HEADERS, datatype=["str"] * len(HEADERS),
+                                 interactive=False, label="Per-seed results", scale=2,
+                                 min_width=320, elem_id="seed-table", max_height=340,
+                                 column_widths=[90, 100, 100, 140, 120, 120, 240])
+            with gr.Column(scale=1, min_width=280):
+                gr.Markdown("### First mismatch")
+                summary = gr.HTML(mismatch_summary(None), apply_default_css=False, elem_id="mismatch-summary")
+                with gr.Accordion("Full mismatch JSON", open=False):
+                    detail = gr.JSON(label="First mismatch")
+                download = gr.DownloadButton(label="Download JSON report")
+        outputs = [verdict, table, detail, download, original_assembly, candidate_assembly]
+        buttons = [run, cancel]
+
+        def verify_ui(binary, function, candidate, bindings, candidate_symbol,
+                      seed_count, seed_start, instruction_budget, compiler, flags, interfaces, session, ticket):
+            for update in stream_ui(run_verification, (binary, function, candidate, bindings, candidate_symbol,
+                                                      seed_count, seed_start, instruction_budget, compiler, flags, interfaces), session, ticket):
+                yield update[0], update[1], json_detail(update[2]), *update[3:]
+
+        def reset_ui(session):
+            reset_session(session)
+            return clear_outputs()
+
+        def load_reference(example):
+            index, values = example
+            source = references[index]
+            return (gr.update(value=source, visible=bool(source)),
+                    gr.update(elem_classes=["has-reference"] if source else []), values[1])
+
+        def clear_reference():
+            return gr.update(value="", visible=False), gr.update(elem_classes=[]), None
+
+        def clear_changed_reference(function, reference_function):
+            if reference_function is not None and function != reference_function:
+                return clear_reference()
+            return (gr.skip(),) * 3
+
+        reference_outputs = [reference, workspace, reference_function]
+
+        # State inputs are private to Gradio and omitted from the public API signature.
+        verify_start = run.click(begin_ui, [session, *inputs], [verdict, *buttons, ticket],
+                                 queue=False, api_visibility="private", show_progress="hidden")
+        preview_event = gr.on(triggers=[], fn=show_assembly, inputs=inputs, outputs=outputs,
+                              api_name="assembly", concurrency_limit=1,
+                              concurrency_id="workbench", show_progress="hidden")
+        event = verify_start.then(verify_ui, [*inputs, session, ticket], outputs, api_name="verify", concurrency_limit=1,
+                                  concurrency_id="workbench", show_progress="hidden")
+        event.then(idle_controls, session, buttons, queue=False,
+                   api_visibility="private", show_progress="hidden")
+        gr.on([binary.upload, binary.delete, binary.clear, *[component.input for component in inputs[1:]]],
+              edit_inputs, [session, *inputs], verdict,
+              queue=False, api_visibility="private", show_progress="hidden")
+        detail.change(mismatch_summary, detail, summary, queue=False,
+                      api_visibility="private", show_progress="hidden")
+        example_picker.dataset.click(reset_ui, session, outputs, queue=False,
+                                     cancels=[event, preview_event], api_name="reset_outputs",
+                                     api_visibility="undocumented", show_progress="hidden")
+        example_picker.dataset.click(lambda: controls(False), outputs=buttons, queue=False,
+                                     api_visibility="private", show_progress="hidden")
+        example_picker.dataset.click(load_reference, example_picker.dataset, reference_outputs,
+                                     queue=False, api_visibility="private", show_progress="hidden")
+        gr.on([binary.upload, binary.delete, binary.clear, function.input],
+              clear_reference, outputs=reference_outputs, queue=False,
+              api_visibility="private", show_progress="hidden")
+        # Gradio 6.9 Textbox.input fires on keypress; blur also catches paste/deletion.
+        function.blur(clear_changed_reference, [function, reference_function], reference_outputs,
+                      queue=False, api_visibility="private", show_progress="hidden")
+        cancel.click(cancel_session, session, verdict, cancels=[event, preview_event], queue=False,
+                     api_visibility="private", show_progress="hidden").then(
+                         idle_controls, session, buttons, queue=False,
+                         api_visibility="private", show_progress="hidden")
+    return app.queue(max_size=16)
+
+
+def main():
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument("--host", default="127.0.0.1")
+    parser.add_argument("--port", type=int, default=7860)
+    args = parser.parse_args()
+    create_app().launch(server_name=args.host, server_port=args.port, share=False)
+
+
+if __name__ == "__main__":
+    main()

demo/examples.py

@@ -0,0 +1,47 @@
+"""Load public, prepared examples without access to the private test suite."""
+
+from hashlib import sha256
+import json
+from pathlib import Path
+import shutil
+
+ROOT = Path(__file__).resolve().parents[1]
+ASSETS = ROOT / "examples"
+CATALOG = json.loads((ASSETS / "catalog.json").read_text())
+EXAMPLE_NAMES = tuple(item["name"] for item in CATALOG)
+EXAMPLE_LABELS = tuple(item["label"] for item in CATALOG)
+ORIGINAL_EXAMPLE_NAMES = tuple(name for name in EXAMPLE_NAMES if not name.startswith("ghidra-"))
+GHIDRA_EXAMPLE_NAMES = tuple(name for name in EXAMPLE_NAMES if name.startswith("ghidra-"))
+ORIGINAL_EXAMPLE_LABELS = tuple(item["label"] for item in CATALOG if not item["name"].startswith("ghidra-"))
+
+
+def example_metadata(name):
+    return next(item for item in CATALOG if item["name"] == name)
+
+
+def ghidra_metadata(name):
+    return example_metadata(name).get("ghidra")
+
+
+def reference_sources():
+    return tuple(example_metadata(name)["reference"] for name in EXAMPLE_NAMES)
+
+
+def prepare_examples(directory, *, include_ghidra=True):
+    directory = Path(directory).resolve()
+    directory.mkdir(parents=True, exist_ok=True)
+    rows = []
+    names = EXAMPLE_NAMES if include_ghidra else ORIGINAL_EXAMPLE_NAMES
+    for name in names:
+        item = example_metadata(name)
+        source = (ASSETS / item["binary"]).resolve()
+        if not source.is_relative_to(ASSETS.resolve()):
+            raise ValueError("example binary must be inside the public assets directory")
+        if sha256(source.read_bytes()).hexdigest() != item["binary_sha256"]:
+            raise ValueError(f"example binary checksum mismatch: {name}")
+        binary = directory / source.name
+        if source != binary:
+            shutil.copyfile(source, binary)
+        rows.append([str(binary), *item["inputs"]])
+    (directory / "examples.json").write_text(json.dumps(rows, indent=2) + "\n")
+    return rows

demo/presentation.py

@@ -0,0 +1,118 @@
+"""Presentation of existing reports; no verification decisions live here."""
+
+from html import escape
+from decimal import Decimal
+from verifier import integer_text
+
+
+STALE_SLOT = "<!--stale-->"
+ABI_SLOT = "<!--abi-->"
+
+
+def json_detail(value):
+    """Display integers as exact text through JSON serialization and the browser."""
+    if isinstance(value, dict):
+        return {key: json_detail(item) for key, item in value.items()}
+    if isinstance(value, (list, tuple)):
+        return [json_detail(item) for item in value]
+    if type(value) is int:
+        return integer_text(value)
+    return value
+
+
+def code(value):
+    return f"<code>{escape(str(value))}</code>"
+
+
+def status(label, tone="amber", progress=""):
+    return (f'<div class="run-status" role="status" aria-live="polite">'
+            f'<strong class="indicator {tone}">{escape(label)}</strong>{STALE_SLOT}'
+            f'<span class="counts">{escape(progress)}</span></div>')
+
+
+def with_stale(value, stale):
+    marker = '<span class="indicator amber stale">Out of date</span>' if stale else ""
+    return value.replace(STALE_SLOT, marker)
+
+
+def format_bit_ranges(ranges):
+    return ", ".join(str(first) if first == last else f"{first}–{last}"
+                     for first, last in ranges)
+
+
+def abi_details(task):
+    rows = []
+    for arg in task["inputs"]:
+        location = code(arg["location"])
+        if arg["randomized"] is False:
+            location += ' <span class="muted">(not randomized)</span>'
+        rows.append(f'<tr><td>{code(arg["name"])}</td><td>{code(arg["type_name"])}</td>'
+                    f'<td>{location}</td></tr>')
+    arguments = ('<table><thead><tr><th>Name</th><th>Type</th><th>Location</th></tr></thead>'
+                 f'<tbody>{"".join(rows)}</tbody></table>' if rows else '<p>No arguments.</p>')
+    variadic = '<p class="muted">Includes explicitly typed variadic inputs.</p>' if task["variadic"] else ""
+    original = task.get("original_interface")
+    provenance = (f'<p>Original interface: {code(original["signature"])} · {code(original["calling_convention"])} · '
+                  f'{code(original["source"])}' + (' (inferred)' if original["inferred"] else '') + '</p>') if original else ""
+    output = task["output"]
+    return (f'{ABI_SLOT}<div class="abi-details"><div><p class="section-label">Prototype</p>'
+            f'{code(task["prototype"])}{provenance}</div><div><p class="section-label">Arguments · {escape(task.get("calling_convention", ""))}</p>'
+            f'{arguments}{variadic}</div><div><p class="section-label">Return</p>'
+            f'<p>{code(output["type_name"])} → {code(output["location"])} '
+            f'({output["width"]} bits)</p></div></div>')
+
+
+def literal_details(task):
+    bindings = task.get("literal_bindings", ())
+    if not bindings:
+        return ""
+    rows = []
+    for binding in bindings:
+        address = binding["address"]
+        detail = hex(address) if address is not None else {
+            "ambiguous": "Several original addresses match; kept local",
+            "unmatched": "No original match; kept local",
+            "skipped": "Unsupported type or source range; kept local",
+        }.get(binding["status"], "")
+        if binding.get("reason") == "binding_introduces_imports":
+            detail = "Binding would introduce library calls; kept local"
+        rows.append(f'<tr><td>{code(binding["literal"])}</td><td>{escape(binding["status"])}</td>'
+                    f'<td>{escape(detail)}</td></tr>')
+    return ('<details class="literal-details"><summary>String literal bindings</summary>'
+            '<table><thead><tr><th>Literal</th><th>Status</th><th>Address / diagnostic</th></tr></thead>'
+            f'<tbody>{"".join(rows)}</tbody></table></details>')
+
+
+def banner(report, complete=False, preview=False):
+    count = len(report.results)
+    label = ("Completed · Assembly preview" if preview else
+             f"Completed · {report.verdict.upper()}" if complete else
+             f"Running {count}/{report.task['seed_count']}")
+    tone = {"agree": "green", "mismatch": "red"}.get(report.verdict, "amber") if complete else "amber"
+    counts = report.counts
+    progress = "" if preview else (f"{counts['agree']} agree · {counts['mismatch']} mismatch · "
+                                    f"{counts['inconclusive']} inconclusive")
+    return status(label, tone, progress) + abi_details(report.task) + literal_details(report.task)
+
+
+def mismatch_summary(detail):
+    if not detail:
+        return '<p class="muted">No mismatch to display.</p>'
+    diff = detail.get("difference") or {}
+    bits = format_bit_ranges((span["first"], span["last"]) for span in diff.get("bit_ranges", ()))
+    values = [("Seed", detail["seed"]), ("Location", diff.get("location", "—")),
+              ("Original value", diff.get("original", "—")),
+              ("Candidate value", diff.get("candidate", "—")), ("Differing bits", bits or "—")]
+    rows = []
+    for label, value in values:
+        if (label.endswith("value") and isinstance(value, str) and "width" in diff
+                and ("xor" not in diff or diff["xor"] is not None)):
+            value = int(Decimal(value))
+        if label.endswith("value") and isinstance(value, int):
+            value = hex(value)
+        elif isinstance(value, int):
+            value = integer_text(value)
+        rows.append(f'<div><dt>{escape(label)}</dt><dd>{code(value)}</dd></div>')
+    reason = detail.get("reason")
+    return (f'<dl class="mismatch-summary">{"".join(rows)}</dl>'
+            + (f'<p>{escape(reason)}</p>' if reason else ""))

demo/session.py

@@ -0,0 +1,104 @@
+"""Private, per-browser state for displayed inputs and cancellable result streams."""
+
+from contextlib import closing
+from threading import RLock
+
+from demo.presentation import ABI_SLOT, status, with_stale
+
+
+class UISession:
+    def __init__(self):
+        self.snapshot = self.current = None
+        self.generation = 0
+        self.busy = False
+        self.display = ""
+        self.lock = RLock()
+
+    def __deepcopy__(self, memo):
+        # Each Gradio session gets its own state and synchronization primitive.
+        session = UISession()
+        session.snapshot, session.current = self.snapshot, self.current
+        session.generation, session.busy, session.display = self.generation, self.busy, self.display
+        return session
+
+    def rendered(self):
+        return with_stale(self.display, self.snapshot is not None and self.snapshot != self.current)
+
+
+def edit_inputs(session, *values):
+    with session.lock:
+        session.current = tuple(values)
+        return session.rendered()
+
+
+def reset_session(session):
+    with session.lock:
+        session.generation += 1
+        session.snapshot = session.current = None
+        session.busy = False
+        session.display = ""
+
+
+def cancel_session(session):
+    with session.lock:
+        session.generation += 1
+        session.busy = False
+        _, separator, abi = session.display.partition(ABI_SLOT)
+        session.display = status("Cancelled") + separator + abi
+        return session.rendered()
+
+
+def controls(busy):
+    import gradio as gr
+
+    return gr.update(interactive=not busy), gr.update(interactive=busy)
+
+
+def idle_controls(session):
+    with session.lock:
+        return controls(session.busy)
+
+
+def begin_ui(session, *values):
+    with session.lock:
+        session.generation += 1
+        session.snapshot = session.current = tuple(values)
+        session.busy = True
+        session.display = status("Building")
+        return session.rendered(), *controls(True), session.generation
+
+
+def stream_ui(handler, values, session, ticket=None):
+    """Keep the six API outputs while protecting this session from obsolete streams."""
+    with session.lock:
+        if ticket is not None:
+            if ticket != session.generation or not session.busy:
+                return
+            values = session.snapshot
+        else:
+            begin_ui(session, *values)
+        generation = session.generation
+        initial = session.rendered()
+    try:
+        yield initial, [], None, None, "", ""
+        with closing(handler(*values)) as iterator:
+            for update in iterator:
+                with session.lock:
+                    if session.generation != generation:
+                        return
+                    session.display = update[0]
+                    rendered = session.rendered()
+                yield (rendered, *update[1:])
+    except Exception:
+        with session.lock:
+            if session.generation == generation:
+                session.display = status("Failed · Check inputs and try again", "red")
+                rendered = session.rendered()
+            else:
+                return
+        yield rendered, [], None, None, "", ""
+        raise
+    finally:
+        with session.lock:
+            if session.generation == generation:
+                session.busy = False

demo/workbench.css

@@ -0,0 +1,62 @@
+.gradio-container { width: 100%; min-width: 0 !important; max-width: 1800px !important; margin: auto; }
+#intro { margin-bottom: 0; }
+#intro h1 { font-size: 1.65rem; letter-spacing: -.025em; }
+#scope { font-size: .85rem; color: var(--body-text-color-subdued); }
+#setup { align-items: stretch; }
+#binary { min-height: 110px; }
+#binary .wrap { min-height: 72px; }
+#actions { gap: 8px; }
+#actions button { flex: 0 1 160px; min-width: 160px; white-space: nowrap; }
+#workspace { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
+#workspace.has-reference { grid-template-columns: repeat(4, minmax(0, 1fr)); }
+#workspace > * { min-width: 0 !important; width: 100%; }
+#workspace > .block { min-height: 418px; }
+#workspace .cm-editor { height: 390px; }
+#workspace .cm-scroller { overflow: auto !important; }
+#workspace .cm-content { white-space: pre !important; }
+#workspace .cm-line { line-height: 1.45; }
+#workspace .cm-gutters { line-height: 1.45; }
+#workspace .cm-editor, #workspace .cm-scroller { font-size: 12px; }
+#workspace .cm-scroller:focus-visible, #workspace button:focus-visible {
+  outline: 2px solid var(--color-accent); outline-offset: -2px;
+}
+.run-status { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; min-height: 44px;
+  padding: 10px 12px; border: 1px solid var(--border-color-primary); border-radius: 8px;
+  background: var(--block-background-fill); }
+.indicator { display: inline-flex; align-items: center; gap: 7px; padding: 4px 9px;
+  border-radius: 5px; font-size: .9rem; font-weight: 600; }
+.indicator::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
+.green { color: #166534; background: #dcfce7; }
+.red { color: #991b1b; background: #fee2e2; }
+.amber { color: #854d0e; background: #fef3c7; }
+.dark .green { color: #86efac; background: #143b2b; }
+.dark .red { color: #fca5a5; background: #451d26; }
+.dark .amber { color: #fde68a; background: #423519; }
+.counts, .muted { color: var(--body-text-color-subdued); font-size: .85rem; }
+.abi-details { display: grid; grid-template-columns: 1fr 1.4fr .7fr; gap: 24px; padding: 16px 2px 4px;
+  font-size: .85rem; color: var(--body-text-color); }
+.abi-details > div { min-width: 0; overflow-x: auto; }
+.section-label { font-weight: 600; margin: 0 0 6px; }
+.abi-details table, .literal-details table { border-collapse: collapse; width: 100%; text-align: left; }
+.abi-details th, .abi-details td, .literal-details th, .literal-details td { padding: 4px 12px 4px 0; vertical-align: top; }
+.abi-details th, .literal-details th { font-weight: 500; color: var(--body-text-color-subdued); }
+.abi-details code, .mismatch-summary code, .literal-details code { font-family: var(--font-mono); }
+.literal-details { margin-top: 12px; overflow-x: auto; font-size: .85rem; }
+.literal-details summary { cursor: pointer; color: var(--body-text-color-subdued); }
+.abi-details p { margin-top: 0; }
+#results { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); align-items: stretch; }
+#results > * { min-width: 0 !important; }
+#seed-table { overflow-x: auto !important; }
+.mismatch-summary { margin: 0; color: var(--body-text-color); }
+.mismatch-summary > div { display: grid; grid-template-columns: 130px minmax(0, 1fr); gap: 10px;
+  padding: 9px 0; border-bottom: 1px solid var(--border-color-primary); }
+.mismatch-summary dt { color: var(--body-text-color-subdued); font-size: .85rem; }
+.mismatch-summary dd { margin: 0; overflow-wrap: anywhere; }
+@media (max-width: 1099px) {
+  #workspace, #workspace.has-reference { grid-template-columns: minmax(0, 1fr); }
+  #workspace > .block { min-height: 328px; }
+  #workspace .cm-editor { height: 300px; }
+  .abi-details { grid-template-columns: minmax(0, 1fr); gap: 12px; }
+}
+@media (max-width: 800px) { #results { grid-template-columns: minmax(0, 1fr); } }
+@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; } }

demo/workbench.js

@@ -0,0 +1,32 @@
+(() => {
+    // Gradio's built-in Code copy controls have empty accessible names.
+    const labelPanes = () => {
+        for (const [id, label] of [
+            ["candidate-source", "Candidate C"],
+            ["reference-source", "Reference C"],
+            ["original-assembly", "Original assembly"],
+            ["candidate-assembly", "Candidate assembly"],
+        ]) {
+            const pane = document.getElementById(id);
+            if (!pane) continue;
+            const copy = pane.querySelector("button.icon-button");
+            if (copy && copy.getAttribute("aria-label") !== `Copy ${label}`) {
+                copy.setAttribute("aria-label", `Copy ${label}`);
+                copy.setAttribute("title", `Copy ${label}`);
+            }
+            const content = pane.querySelector(".cm-content");
+            if (content && content.getAttribute("aria-label") !== label) {
+                content.setAttribute("aria-label", label);
+            }
+            const scroller = pane.querySelector(".cm-scroller");
+            if (id !== "candidate-source" && scroller && scroller.tabIndex !== 0) {
+                scroller.tabIndex = 0;
+                scroller.setAttribute("aria-label", `${label} scroll area`);
+            }
+        }
+    };
+    labelPanes();
+    new MutationObserver(labelPanes).observe(document.body, {
+        childList: true, subtree: true,
+    });
+})();

examples/COPYING

@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
+or can get the source code.  And you must show them these terms so they
+know their rights.
+
+  Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+  For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+  Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
+can do so.  This is fundamentally incompatible with the aim of
+protecting users' freedom to change the software.  The systematic
+pattern of such abuse occurs in the area of products for individuals to
+use, which is precisely where it is most unacceptable.  Therefore, we
+have designed this version of the GPL to prohibit the practice for those
+products.  If such problems arise substantially in other domains, we
+stand ready to extend this provision to those domains in future versions
+of the GPL, as needed to protect the freedom of users.
+
+  Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
+software on general-purpose computers, but in those that do, we wish to
+avoid the special danger that patents applied to a free program could
+make it effectively proprietary.  To prevent this, the GPL assures that
+patents cannot be used to render the program non-free.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                       TERMS AND CONDITIONS
+
+  0. Definitions.
+
+  "This License" refers to version 3 of the GNU General Public License.
+
+  "Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
+
+  "The Program" refers to any copyrightable work licensed under this
+License.  Each licensee is addressed as "you".  "Licensees" and
+"recipients" may be individuals or organizations.
+
+  To "modify" a work means to copy from or adapt all or part of the work
+in a fashion requiring copyright permission, other than the making of an
+exact copy.  The resulting work is called a "modified version" of the
+earlier work or a work "based on" the earlier work.
+
+  A "covered work" means either the unmodified Program or a work based
+on the Program.
+
+  To "propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
+infringement under applicable copyright law, except executing it on a
+computer or modifying a private copy.  Propagation includes copying,
+distribution (with or without modification), making available to the
+public, and in some countries other activities as well.
+
+  To "convey" a work means any kind of propagation that enables other
+parties to make or receive copies.  Mere interaction with a user through
+a computer network, with no transfer of a copy, is not conveying.
+
+  An interactive user interface displays "Appropriate Legal Notices"
+to the extent that it includes a convenient and prominently visible
+feature that (1) displays an appropriate copyright notice, and (2)
+tells the user that there is no warranty for the work (except to the
+extent that warranties are provided), that licensees may convey the
+work under this License, and how to view a copy of this License.  If
+the interface presents a list of user commands or options, such as a
+menu, a prominent item in the list meets this criterion.
+
+  1. Source Code.
+
+  The "source code" for a work means the preferred form of the work
+for making modifications to it.  "Object code" means any non-source
+form of a work.
+
+  A "Standard Interface" means an interface that either is an official
+standard defined by a recognized standards body, or, in the case of
+interfaces specified for a particular programming language, one that
+is widely used among developers working in that language.
+
+  The "System Libraries" of an executable work include anything, other
+than the work as a whole, that (a) is included in the normal form of
+packaging a Major Component, but which is not part of that Major
+Component, and (b) serves only to enable use of the work with that
+Major Component, or to implement a Standard Interface for which an
+implementation is available to the public in source code form.  A
+"Major Component", in this context, means a major essential component
+(kernel, window system, and so on) of the specific operating system
+(if any) on which the executable work runs, or a compiler used to
+produce the work, or an object code interpreter used to run it.
+
+  The "Corresponding Source" for a work in object code form means all
+the source code needed to generate, install, and (for an executable
+work) run the object code and to modify the work, including scripts to
+control those activities.  However, it does not include the work's
+System Libraries, or general-purpose tools or generally available free
+programs which are used unmodified in performing those activities but
+which are not part of the work.  For example, Corresponding Source
+includes interface definition files associated with source files for
+the work, and the source code for shared libraries and dynamically
+linked subprograms that the work is specifically designed to require,
+such as by intimate data communication or control flow between those
+subprograms and other parts of the work.
+
+  The Corresponding Source need not include anything that users
+can regenerate automatically from other parts of the Corresponding
+Source.
+
+  The Corresponding Source for a work in source code form is that
+same work.
+
+  2. Basic Permissions.
+
+  All rights granted under this License are granted for the term of
+copyright on the Program, and are irrevocable provided the stated
+conditions are met.  This License explicitly affirms your unlimited
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+  7. Additional Terms.
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+  "Additional permissions" are terms that supplement the terms of this
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+  9. Acceptance Not Required for Having Copies.
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+  10. Automatic Licensing of Downstream Recipients.
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+  11. Patents.
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+  A "contributor" is a copyright holder who authorizes use under this
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+  A patent license is "discriminatory" if it does not include within
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+
+  Nothing in this License shall be construed as excluding or limiting
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+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
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+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
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+
+  14. Revised Versions of this License.
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+  The Free Software Foundation may publish revised and/or new versions of
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+  If the Program specifies that a proxy can decide which future
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+  Later license versions may give you additional or different
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+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
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+  17. Interpretation of Sections 15 and 16.
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+  If the disclaimer of warranty and limitation of liability provided
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+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
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+  To do so, attach the following notices to the program.  It is safest
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+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
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+    This program is free software: you can redistribute it and/or modify
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+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
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+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
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+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
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+may consider it more useful to permit linking proprietary applications with
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+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.