• Prescan holder check: the only copyright holder in the tree is Jorge C. Leitao (Cargo.toml.orig:8 authors, LICENSE appendix), and debian/copyright names him in Files: *; no unnamed holder was found. Scanned all 14 files of the tree apart from .pc/.
• LICENSE is the unmodified Apache-2.0 text; debian/copyright points at /usr/share/common-licenses/Apache-2.0 for the licence body, which is where Debian keeps it, so no licence text is missing.
• debian/copyright Files: * gives the years 2022-2025 while the only notice in the tree says Copyright 2020-2022 Jorge C. Leitão; holder and licence are right and this is year-range drift only, so not reported.
• src/ipc/generated.rs (19,965 lines, sampled at head) is planus output — its header names File.fbs, Schema.fbs, Message.fbs, SparseTensor.fbs, Tensor.fbs, and generate.sh shows it is built by fetching those from apache/arrow and running planus; src/flight/data.rs (243 lines) is prost output, headed Generated code of protobuf (Flight.proto). The schema inputs are not in the crate, as upstream ships only the generated Rust; both files are plain readable Rust under Apache-2.0 and can be edited directly, so this is not a source-availability problem and neither is a built or minified file.
• tests/debian_compat.rs and tests/debian_planus.rs are Debian-written, added by debian/patches/debian-features.patch and debian/patches/planus-compat-tests.patch; both are attributed in the second debian/copyright stanza, which also covers debian/* (patches and packaging included).
• apt-cache: librust-planus-dev 1.3.0-1 provides librust-planus-1.3+default-dev (= 1.3.0-1), satisfying both the unversioned and the (<< 1.3.1) Depends entry and the (>= 1.3.0), (<< 1.3.1) Build-Depends-Arch bounds against the patched planus = "=1.3.0"; librust-prost-0.14+default-dev and librust-prost-derive-0.14+default-dev are provided by librust-prost-dev/librust-prost-derive-dev 0.14.4-1; dh-cargo 34 satisfies the autopkgtests' dh-cargo (>= 33~).
• compat 13: the debhelper tool confirms dh skips override and hook targets of dh_auto_test under DEB_BUILD_OPTIONS=nocheck, so debian/rules:5 needs no nocheck check of its own.
• /usr/share/perl5/Debian/Debhelper/Buildsystem/cargo.pm build only copies sources for a library package and test is what runs cargo; a nocheck build therefore compiles nothing, which makes cargo:native, rustc:native and libstd-rust-dev <!nocheck> correct rather than a broken clean build.
• All four patches in debian/patches/series carry DEP-3 headers (Description, Author, Forwarded, Last-Update); debian/README.source explains the Planus 1.3.0 port, the removal of the Flight service module and the test coverage, and is consistent with the patches as applied.
• debian/rules dh_auto_test -- test --all-features compiles both supported interfaces, and the two [[test]] entries with required-features keep the Debian tests out of the feature lanes that cannot build them; debian/tests/control has a test per Provides feature.
• Standards-Version 4.7.4 is current: the policy tool's upgrading checklist ends at 4.7.4. debian/changelog version 0.2.1-1 matches the .dsc, distribution unstable, and its date (Fri, 06 Nov 2026) is a Friday.
• Package split, fields and substvars: one librust-polars-arrow-format-dev, Section: rust, Multi-Arch: same, ${misc:Depends} used; the package installs only Rust source, so there is nothing for dh_shlibdeps to put in ${shlibs:Depends} (as debian/README.source notes).
• uscan found the packaged version as the newest upstream release (upstream 0.2.1, packaged 0.2.1).
• Every pointer of debian/copyright to /usr/share/common-licenses names a file that is there (Apache-2.0).

• Seven of the nine autopkgtests in debian/tests/control carry Architecture: !riscv64 and nothing in the package records why; whether those feature tests still fail or time out on riscv64 could not be checked here.
• The claim in debian/README.source and in debian/patches/planus-1.3.patch that Planus 1.1.1 and 1.3.0 differ in production code only by the version assertion cannot be verified on the reviewing system: Planus 1.1.1 is not available and no build or test is run.

None.