diff --git a/.github/workflows/checks.yml b/.github/workflows/checks.yml
index 4cab7ca4..1b0cb65e 100644
--- a/.github/workflows/checks.yml
+++ b/.github/workflows/checks.yml
@@ -56,6 +56,11 @@ jobs:
           python-version: '3.12'
           cache: pip
       - run: pip install -r requirements-docs.txt
+      # An op the pages name and the checkout no longer exports is reported
+      # here, rather than aborting mkdocs mid-build on `Could not collect`.
+      - name: Check the API pages against the checkout
+        run: python scripts/check_api_pages.py
+
       # Every warning fails the job except one class: mkdocstrings reports one
       # per parameter in TileOPs whose docstring carries no type, and the
       # docstrings of another repository are not this repository's gate.
diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index 581c148e..f1cb7077 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -33,6 +33,11 @@ jobs:
         with:
           python-version: '3.12'
       - run: pip install -r requirements-docs.txt
+      # An op the pages name and the checkout no longer exports is reported
+      # here, rather than aborting mkdocs mid-build on `Could not collect`.
+      - name: Check the API pages against the checkout
+        run: python scripts/check_api_pages.py
+
       # Regenerate the Benchmarks page from the latest nightly snapshot so a
       # push deploy never serves a stale page. Falls back to the placeholder if
       # the snapshot is unavailable.
diff --git a/.github/workflows/render-benchmarks.yml b/.github/workflows/render-benchmarks.yml
index 0d27ea46..634533f2 100644
--- a/.github/workflows/render-benchmarks.yml
+++ b/.github/workflows/render-benchmarks.yml
@@ -49,6 +49,11 @@ jobs:
 
       - run: pip install -r requirements-docs.txt
 
+      # An op the pages name and the checkout no longer exports is reported
+      # here, rather than aborting mkdocs mid-build on `Could not collect`.
+      - name: Check the API pages against the checkout
+        run: python scripts/check_api_pages.py
+
       - name: Render benchmark page from the newest snapshot
         run: bash scripts/render_bench.sh
 
diff --git a/CLAUDE.md b/CLAUDE.md
index 4efa4eb3..e12283d8 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -31,6 +31,7 @@ and `design/` mirrors its `docs/design/`. Without it, mkdocstrings cannot import
 | `ruff check scripts hooks.py tests` | `pyproject.toml`; `E501` off, the prose here is wrapped by hand |
 | `npx stylelint "docs/assets/**/*.css"` | No duplicate selector, no `color-mix()` — an engine that cannot parse a function drops the whole declaration, so a border vanishes and an SVG `fill` paints black |
 | `mkdocs build` | Fails on any warning of ours; griffe's are TileOPs' docstrings, not this repo's gate |
+| `python scripts/check_api_pages.py` | Every `::: tileops.<family>.<Op>` under `docs/api/` is in that family's `__all__` in the checkout; an exported op no page names is printed, not failed |
 
 Seven tests, and that is the intended size. `tests/fixtures/` is a trimmed
 snapshot — one testcase per path the renderer takes — and `tests/golden/` the
@@ -52,6 +53,11 @@ Never edit these by hand — change what produces them.
 `hooks.py` rewrites the repo-relative paths mirrored content arrives with, and
 expands the single `Benchmarks` nav entry to whichever pages the renderer produced.
 
+Which ops a `docs/api/` page names is written by hand, so it drifts as TileOPs
+adds and removes ops. The deploy and the daily refresh run
+`scripts/check_api_pages.py` against the checkout they just made, before mkdocs
+reads it.
+
 ## Benchmarks pages
 
 They answer one question per workload: how TileOPs compares to the fastest other
diff --git a/scripts/check_api_pages.py b/scripts/check_api_pages.py
new file mode 100644
index 00000000..8db00570
--- /dev/null
+++ b/scripts/check_api_pages.py
@@ -0,0 +1,116 @@
+#!/usr/bin/env python3
+"""Compare the ops the API pages name against the ops a TileOPs checkout exports.
+
+The pages under `docs/api/` name their ops one by one, and every build checks
+TileOPs out fresh. An op the pages name and the checkout no longer exports fails
+this check: mkdocs would otherwise abort mid-build on `Could not collect`. An op
+exported with no page is printed and does not fail — TileOPs adds ops on its own
+schedule, and an unrelated pull request here is not the place to stop for one.
+
+Families come from `_FAMILIES` in `tileops/__init__.py`, their ops from the
+`__all__` of `tileops/<family>.py`, read with `ast`: importing a family pulls in
+torch, which the docs environment does not install. A path of more than two
+segments, such as `tileops.trace.api._Trace`, belongs to no family and is left
+alone.
+
+Usage:
+    python scripts/check_api_pages.py [--tileops TileOPs/src] [--docs docs/api]
+"""
+
+from __future__ import annotations
+
+import argparse
+import ast
+import re
+import sys
+from pathlib import Path
+
+IDENTIFIER = re.compile(r"^\s*::: +tileops\.(\w+)\.(\w+)\s*$", re.MULTILINE)
+
+
+def _names(path: Path, variable: str) -> list[str]:
+    """The strings assigned to `variable` at the top level of the module at `path`."""
+    if not path.is_file():
+        raise SystemExit(f"no such file: {path} — is there a TileOPs checkout?")
+    for node in ast.parse(path.read_text(encoding="utf-8"), filename=str(path)).body:
+        if not isinstance(node, ast.Assign):
+            continue
+        if not any(isinstance(t, ast.Name) and t.id == variable for t in node.targets):
+            continue
+        # Anything but a literal of strings is refused rather than read past: a
+        # name silently dropped here is an op this check would stop looking at.
+        if not isinstance(node.value, ast.Tuple | ast.List):
+            raise SystemExit(f"{path}: {variable} is not a list or tuple literal")
+        names = [
+            e.value
+            for e in node.value.elts
+            if isinstance(e, ast.Constant) and isinstance(e.value, str)
+        ]
+        if len(names) != len(node.value.elts):
+            raise SystemExit(f"{path}: {variable} holds something other than plain strings")
+        return names
+    raise SystemExit(f"{path}: no top-level {variable}")
+
+
+def exported(src: Path) -> dict[str, list[str]]:
+    """Op names per family, from the TileOPs source tree at `src`."""
+    families = _names(src / "tileops" / "__init__.py", "_FAMILIES")
+    return {f: _names(src / "tileops" / f"{f}.py", "__all__") for f in families}
+
+
+def documented(pages: Path) -> dict[str, dict[str, str]]:
+    """Op names per family, each mapped to the page that names it."""
+    found: dict[str, dict[str, str]] = {}
+    for page in sorted(pages.glob("*.md")):
+        for family, op in IDENTIFIER.findall(page.read_text(encoding="utf-8")):
+            found.setdefault(family, {})[op] = page.name
+    return found
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument("--tileops", type=Path, default=Path("TileOPs/src"))
+    parser.add_argument("--docs", type=Path, default=Path("docs/api"))
+    args = parser.parse_args()
+
+    families = exported(args.tileops)
+    pages = documented(args.docs)
+    # Empty means the pages carry no identifier at all — a regex that stopped
+    # matching, not a page naming an op wrongly, which is reported below.
+    if not pages:
+        raise SystemExit(f"no `::: tileops.<family>.<Op>` identifier under {args.docs}")
+
+    uncollectable, undocumented = [], []
+    for family, on_page in sorted(pages.items()):
+        if family not in families:
+            uncollectable += [
+                f"{page}: tileops.{family}.{op} names no op family of the checkout"
+                for op, page in sorted(on_page.items())
+            ]
+            continue
+        uncollectable += [
+            f"{on_page[op]}: tileops.{family}.{op} is not in the `__all__` of "
+            f"tileops/{family}.py — the build cannot collect it"
+            for op in sorted(set(on_page) - set(families[family]))
+        ]
+    for family, ops in families.items():
+        undocumented += [
+            f"tileops.{family}.{op} is exported, and no page under {args.docs} names it"
+            for op in ops
+            if op not in pages.get(family, {})
+        ]
+
+    for line in uncollectable + undocumented:
+        print(line, file=sys.stderr)
+    if uncollectable:
+        print(f"\n{len(uncollectable)} op(s) the build cannot collect", file=sys.stderr)
+        return 1
+    if undocumented:
+        print(f"{len(undocumented)} exported op(s) no page names")
+        return 0
+    print(f"{sum(len(ops) for ops in families.values())} ops, on the page and exported")
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())