diff --git a/.github/workflows/adopt-energyplus.yml b/.github/workflows/adopt-energyplus.yml
new file mode 100644
index 000000000..d28e44b49
--- /dev/null
+++ b/.github/workflows/adopt-energyplus.yml
@@ -0,0 +1,49 @@
+name: adopt-energyplus
+
+# Adopt one EnergyPlus release in this project, as a draft pull request on `energyplus/X.Y.Z`.
+#
+# This file holds no logic. The steps, their order, the command each one runs and the gate are
+# declared for the project `idfkit-docs` in `governance/energyplus.toml` of idfkit-conformance, and
+# the reusable workflow called below executes exactly those commands and no others. It never
+# merges, publishes or converts: the caller grants `contents: write` and `pull-requests: write` only.
+#
+# THE TAG IS STATED TWICE, on `uses:` and as `governance_level`, because a called workflow cannot
+# see its own ref. The reusable workflow refuses the run unless the two are the same string, so
+# both are changed together or not at all.
+#
+# THE ORDER IS A RULE. The idfkit level is moved by bump-idfkit.yml and not here. The step that adds
+# the release to TARGET_VERSIONS (`python -m scripts.adopt_release target-list`) exits with status
+# 1 while the installed idfkit does not list the release, because idfkit returns the newest schema
+# it holds for a release it does not list and the conversion would publish the wrong field
+# metadata without failing. The report of documentation directories that no configured set matches
+# (`python -m scripts.adopt_release doc-sets`) is copied into the pull request body, and into the
+# job summary, for a person to accept.
+# Converting and publishing the release remains convert-docs.yml, dispatched by a maintainer after
+# the merge.
+#
+# It is dispatched by the watch in idfkit-conformance, and may be dispatched by hand. A second run
+# for a release that is already carried changes nothing.
+run-name: Adopt EnergyPlus ${{ inputs.release }}
+
+on:
+  workflow_dispatch:
+    inputs:
+      release:
+        description: The EnergyPlus release to adopt, as X.Y.Z.
+        required: true
+        type: string
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  adopt:
+    uses: idfkit/idfkit-conformance/.github/workflows/adopt-energyplus.yml@governance-2026.25
+    with:
+      project: idfkit-docs
+      governance_level: governance-2026.25
+      release: ${{ inputs.release }}
+    secrets:
+      APP_ID: ${{ secrets.APP_ID }}
+      APP_PRIVATE_KEY: ${{ secrets.APP_PRIVATE_KEY }}
diff --git a/scripts/adopt_release.py b/scripts/adopt_release.py
new file mode 100644
index 000000000..5c6f79371
--- /dev/null
+++ b/scripts/adopt_release.py
@@ -0,0 +1,311 @@
+"""Commands that the adoption of an EnergyPlus release runs in this repository.
+
+The adoption procedure is held in idfkit-conformance (``energyplus/README.md``). Its version roster
+declares two commands for this project, and both are defined here.
+
+``target-list TAG``
+    Adds the release to ``TARGET_VERSIONS`` in ``scripts/config.py`` and designates the newest
+    listed release ``LATEST_VERSION``. The command refuses, with exit status 1, when the installed
+    idfkit does not list the release. idfkit returns the newest schema it holds for a release it
+    does not list, so a conversion against an older level would publish the field metadata of the
+    previous release under the heading of the new one without failing. The command also refuses
+    when another patch release of the same ``MAJOR.MINOR`` is listed, because the build and the
+    published path of a release are named ``vMAJOR.MINOR`` and the two would overwrite each other.
+
+``doc-sets TAG``
+    Reports how the documentation directories of the upstream release map onto ``DOC_SET_INFO``:
+    LaTeX directories that no configured set matches (converted under a generated title), Sphinx
+    directories that no configured set matches (omitted from the site), configured sets found in
+    neither tree, and sets whose source format differs from the preceding release. The command
+    changes no file and exits with status 0 whatever it finds. A person accepts the report.
+
+Both commands are idempotent.
+"""
+
+# Each refusal states its own reason, so the messages are composed where they are raised.
+# ruff: noqa: TRY003
+
+from __future__ import annotations
+
+import argparse
+import os
+import re
+import subprocess
+import sys
+import tempfile
+from dataclasses import dataclass, field
+from pathlib import Path
+from typing import Literal
+
+from idfkit.versions import ENERGYPLUS_VERSIONS
+
+from scripts.config import DOC_SET_INFO, ENERGYPLUS_REPO, EXCLUDED_DIRS, TARGET_VERSIONS, version_to_short
+from scripts.rst_doc_sets import SPHINX_EXCLUDED_DIRS, SPHINX_SUBDIR, discover_rst_doc_sets
+
+CONFIG_PATH = Path(__file__).parent / "config.py"
+
+_TAG = re.compile(r"v(\d+)\.(\d+)\.(\d+)")
+_TARGET_BLOCK = re.compile(
+    r"(?P<head>^TARGET_VERSIONS: list\[str\] = \[\n)(?P<body>(?:    \"v\d+\.\d+\.\d+\",\n)+)(?P<tail>\]\n)",
+    re.MULTILINE,
+)
+_LATEST_LINE = re.compile(r'^LATEST_VERSION: str = "v\d+\.\d+\.\d+"$', re.MULTILINE)
+
+# Upper bound for one git command of the upstream fetch. A stalled connection otherwise holds the
+# adoption job until its own limit.
+_GIT_TIMEOUT_SECONDS = 600
+
+
+class AdoptionError(Exception):
+    """The command cannot be performed. The message states the reason."""
+
+
+@dataclass(frozen=True, order=True)
+class ReleaseTag:
+    """An EnergyPlus release, written ``vMAJOR.MINOR.PATCH`` in this repository."""
+
+    major: int
+    minor: int
+    patch: int
+
+    @classmethod
+    def parse(cls, text: str) -> ReleaseTag:
+        match = _TAG.fullmatch(text)
+        if match is None:
+            raise AdoptionError(f"'{text}' is not a release tag of the form vMAJOR.MINOR.PATCH")
+        return cls(int(match.group(1)), int(match.group(2)), int(match.group(3)))
+
+    def as_tuple(self) -> tuple[int, int, int]:
+        return (self.major, self.minor, self.patch)
+
+    def __str__(self) -> str:
+        return f"v{self.major}.{self.minor}.{self.patch}"
+
+
+# ── The target list ───────────────────────────────────────────────────────────
+
+
+def require_library_lists(release: ReleaseTag) -> None:
+    """Raise unless the installed idfkit lists *release* among its supported versions."""
+    if release.as_tuple() not in ENERGYPLUS_VERSIONS:
+        newest = ReleaseTag(*ENERGYPLUS_VERSIONS[-1])
+        raise AdoptionError(
+            f"the installed idfkit does not list {release}; its newest release is {newest}. "
+            "Move the idfkit pin in pyproject.toml to a version that carries the release "
+            "(bump-idfkit.yml) before adding the release to the target list."
+        )
+
+
+def with_release(config_text: str, release: ReleaseTag) -> str:
+    """Return *config_text* with *release* in ``TARGET_VERSIONS`` and the newest entry as ``LATEST_VERSION``."""
+    block = _TARGET_BLOCK.search(config_text)
+    if block is None:
+        raise AdoptionError("TARGET_VERSIONS was not found in scripts/config.py in the expected layout")
+    if len(_LATEST_LINE.findall(config_text)) != 1:
+        raise AdoptionError("LATEST_VERSION was not found exactly once in scripts/config.py")
+    listed = {ReleaseTag.parse(tag) for tag in re.findall(r'"(v\d+\.\d+\.\d+)"', block.group("body"))}
+    # Every build and published path is named by version_to_short, that is vMAJOR.MINOR. Two patch
+    # releases of one MAJOR.MINOR would be built into, and deployed to, the same directory.
+    same_minor = sorted(tag for tag in listed if (tag.major, tag.minor) == (release.major, release.minor))
+    if same_minor and release not in listed:
+        raise AdoptionError(
+            f"{same_minor[-1]} is listed and shares the path {version_to_short(str(release))} with {release}. "
+            f"Remove {same_minor[-1]} from TARGET_VERSIONS in scripts/config.py if {release} replaces it, "
+            "then run the command again."
+        )
+    ordered = sorted(listed | {release})
+    body = "".join(f'    "{tag}",\n' for tag in ordered)
+    text = config_text[: block.start("body")] + body + config_text[block.end("body") :]
+    return _LATEST_LINE.sub(f'LATEST_VERSION: str = "{ordered[-1]}"', text)
+
+
+def add_to_target_list(release: ReleaseTag, config_path: Path = CONFIG_PATH) -> bool:
+    """Write *release* into the configuration. Returns whether the file changed."""
+    require_library_lists(release)
+    before = config_path.read_text(encoding="utf-8")
+    after = with_release(before, release)
+    if after == before:
+        return False
+    config_path.write_text(after, encoding="utf-8")
+    return True
+
+
+# ── The documentation sets ────────────────────────────────────────────────────
+
+
+#: The source format a configured set is found in.
+SourceFormat = Literal["latex", "rst"]
+
+
+@dataclass(frozen=True)
+class DocSetSurvey:
+    """How the documentation directories of one upstream release map onto ``DOC_SET_INFO``."""
+
+    release: ReleaseTag
+    #: Configured set name to the source format it is found in, ``latex`` or ``rst``.
+    formats: dict[str, SourceFormat] = field(default_factory=dict)
+    #: LaTeX directories with a main document that no configured set names.
+    unmatched_latex: tuple[str, ...] = ()
+    #: Sphinx directories with a main document that no configured set or alias matches.
+    unmatched_sphinx: tuple[str, ...] = ()
+
+    @property
+    def missing(self) -> tuple[str, ...]:
+        return tuple(name for name in DOC_SET_INFO if name not in self.formats)
+
+
+def _directories(parent: Path, excluded: frozenset[str] | set[str], suffix: str) -> list[Path]:
+    if not parent.is_dir():
+        return []
+    return [
+        entry
+        for entry in sorted(parent.iterdir())
+        if entry.is_dir()
+        and entry.name not in excluded
+        and not entry.name.startswith(".")
+        and (entry / f"{entry.name}{suffix}").exists()
+    ]
+
+
+def survey(source_dir: Path, release: ReleaseTag) -> DocSetSurvey:
+    """Survey a source tree with the rules ``discover_doc_sets`` applies in ``scripts/convert.py``.
+
+    The LaTeX tree takes precedence. A Sphinx directory is used only for a configured set that the
+    LaTeX tree does not provide.
+    """
+    doc_dir = source_dir / "doc"
+    if not doc_dir.is_dir():
+        raise AdoptionError(f"no doc/ directory at {source_dir}")
+    latex = [entry.name for entry in _directories(doc_dir, EXCLUDED_DIRS, ".tex")]
+    formats: dict[str, SourceFormat] = {name: "latex" for name in latex if name in DOC_SET_INFO}
+    matched_sphinx: set[str] = set()
+    for doc_set in discover_rst_doc_sets(source_dir, DOC_SET_INFO):
+        matched_sphinx.add(doc_set.source_dir.name)
+        formats.setdefault(doc_set.dir_name, "rst")
+    sphinx = [entry.name for entry in _directories(doc_dir / SPHINX_SUBDIR, SPHINX_EXCLUDED_DIRS, ".rst")]
+    return DocSetSurvey(
+        release=release,
+        formats=formats,
+        unmatched_latex=tuple(name for name in latex if name not in DOC_SET_INFO),
+        unmatched_sphinx=tuple(name for name in sphinx if name not in matched_sphinx),
+    )
+
+
+@dataclass(frozen=True)
+class _GitCommand:
+    """One git command of the upstream fetch, with the name a failure is reported under."""
+
+    name: str
+    arguments: tuple[str, ...]
+
+
+def fetch_entry_documents(release: ReleaseTag, destination: Path) -> Path:
+    """Check out the entry document of every documentation directory of *release*, and nothing else."""
+    target = destination / str(release)
+    commands = (
+        _GitCommand("git clone", ("git", "clone", "--quiet", "--filter=blob:none", "--no-checkout", "--depth=1", "--branch", str(release), "--single-branch", ENERGYPLUS_REPO, str(target))),
+        _GitCommand("git sparse-checkout", ("git", "-C", str(target), "sparse-checkout", "set", "--no-cone", "/doc/*/*.tex", f"/doc/{SPHINX_SUBDIR}/*/*.rst")),
+        _GitCommand("git checkout", ("git", "-C", str(target), "checkout", "--quiet")),
+    )  # fmt: skip
+    for command in commands:
+        try:
+            done = subprocess.run(
+                command.arguments, capture_output=True, text=True, check=False, timeout=_GIT_TIMEOUT_SECONDS
+            )
+        except subprocess.TimeoutExpired as expired:
+            raise AdoptionError(
+                f"{command.name} did not finish within {_GIT_TIMEOUT_SECONDS} s for {release}"
+            ) from expired
+        if done.returncode != 0:
+            raise AdoptionError(f"{command.name} failed for {release}: {done.stderr.strip()}")
+    return target
+
+
+def preceding(release: ReleaseTag) -> ReleaseTag | None:
+    """The newest configured release older than *release*, or ``None``."""
+    older = [tag for tag in map(ReleaseTag.parse, TARGET_VERSIONS) if tag < release]
+    return max(older) if older else None
+
+
+def render(current: DocSetSurvey, previous: DocSetSurvey | None) -> str:
+    """The report a person accepts, as Markdown."""
+
+    def listing(names: tuple[str, ...] | list[str]) -> list[str]:
+        return [f"- `{name}`" for name in names] or ["- none"]
+
+    lines = [f"### Documentation sets of EnergyPlus {current.release}", ""]
+    lines += [f"Configured sets found: {len(current.formats)} of {len(DOC_SET_INFO)}.", ""]
+    lines += ["**Sphinx directories that no configured set matches (omitted from the site):**", ""]
+    lines += [*listing(current.unmatched_sphinx), ""]
+    lines += ["**LaTeX directories that no configured set matches (converted under a generated title):**", ""]
+    lines += [*listing(current.unmatched_latex), ""]
+    lines += ["**Configured sets found in neither tree (absent from the build):**", ""]
+    lines += [*listing(current.missing), ""]
+    if previous is not None:
+        moved = [
+            f"{name}: {previous.formats[name]} in {previous.release}, {fmt} in {current.release}"
+            for name, fmt in current.formats.items()
+            if name in previous.formats and previous.formats[name] != fmt
+        ]
+        # The two trees are compared separately. An unmatched directory that moves from the LaTeX
+        # tree to the Sphinx tree under the same name changes from converted to omitted.
+        new = [
+            *(f"{name} (LaTeX)" for name in current.unmatched_latex if name not in previous.unmatched_latex),
+            *(f"{name} (Sphinx)" for name in current.unmatched_sphinx if name not in previous.unmatched_sphinx),
+        ]
+        lines += [f"**Sets whose source format differs from {previous.release}:**", "", *listing(moved), ""]
+        lines += [f"**Unmatched directories that {previous.release} did not have:**", "", *listing(new), ""]
+    else:
+        lines += ["No preceding release was surveyed, so no comparison with one is reported.", ""]
+    lines += [
+        "Accept when each unmatched directory is either configured in `DOC_SET_INFO` or `DOC_SET_ALIASES` "
+        "with a title, or stated as excluded, and each set that changed format has been converted once "
+        f"(`make convert VERSION={current.release}`) and read.",
+    ]
+    return "\n".join(lines) + "\n"
+
+
+def report_doc_sets(release: ReleaseTag, source: Path | None) -> str:
+    with tempfile.TemporaryDirectory() as scratch:
+        current = survey(source or fetch_entry_documents(release, Path(scratch)), release)
+        before = preceding(release)
+        previous = survey(fetch_entry_documents(before, Path(scratch)), before) if before and source is None else None
+        return render(current, previous)
+
+
+# ── The command line ──────────────────────────────────────────────────────────
+
+
+def main(argv: list[str] | None = None) -> int:
+    parser = argparse.ArgumentParser(description="Commands of an EnergyPlus release adoption")
+    commands = parser.add_subparsers(dest="command", required=True)
+    target = commands.add_parser(
+        "target-list", help="Add a release to TARGET_VERSIONS and designate the newest as latest"
+    )
+    target.add_argument("release", help="Release tag (e.g., v25.2.0)")
+    sets = commands.add_parser("doc-sets", help="Report how upstream documentation directories map onto DOC_SET_INFO")
+    sets.add_argument("release", help="Release tag (e.g., v25.2.0)")
+    sets.add_argument("--source", type=Path, help="An EnergyPlus source tree to survey instead of fetching the release")
+    args = parser.parse_args(argv)
+
+    try:
+        release = ReleaseTag.parse(args.release)
+        if args.command == "target-list":
+            changed = add_to_target_list(release)
+            print(f"{release}: {'added to' if changed else 'already in'} scripts/config.py")
+            return 0
+        report = report_doc_sets(release, args.source)
+    except AdoptionError as error:
+        print(f"error: {error}", file=sys.stderr)
+        return 1
+    print(report)
+    # The adoption run copies the output of this step into the pull request body. The job summary
+    # holds the same report rendered as Markdown.
+    if summary := os.environ.get("GITHUB_STEP_SUMMARY"):
+        with Path(summary).open("a", encoding="utf-8") as handle:
+            handle.write(report)
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())