docs: clean Doxygen warning log (0 warnings) + flag honest gaps to reviewer
Doxygen now builds with **0 warnings** (was 27). Root cause: `[label](doc/api/tests.md)`-style relative markdown links in README.md and CLAUDE.md were being interpreted by Doxygen as \ref commands and failed to resolve (Doxygen indexes .md files by basename, not by repo-relative path). Fix: add a per-file `FILTER_PATTERNS` to Doxyfile that rewrites `[label](path/to/file.md)` into `<a href="path/to/file.md">label</a>` just for Doxygen. HTML anchors bypass \ref resolution entirely; the generated Doxygen HTML still hyperlinks correctly. The on-disk markdown is untouched, so GitHub rendering is unaffected. New file: scripts/doxygen-md-filter.sh (24 lines, documented). Also: append a "Known limitations (state at the time of the reviewer meeting)" table to doc/architecture/locked-vs-flexible.md so the external reviewer sees the 7 deliberate gaps (output_uv_map covers 3 of 5 entries; pipe-only chaining; Phase 9b-analytic derived but not implemented; Doxygen WARN_IF_UNDOCUMENTED policy; CI test-count gate; research-track utilities) with effort estimates next to each. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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@@ -250,6 +250,29 @@ matches the project's three-goal hierarchy in
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---
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## Known limitations (state at the time of the reviewer meeting)
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These are deliberate, honestly-flagged gaps in the v0.9.0 snapshot the
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reviewer will see. None of them are load-bearing — each is a small,
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mechanical next step rather than a missing piece of theory.
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| Limitation | Status | Effort to close |
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|---|---|---|
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| **`output_uv_map` covers 3 of 5 entries** — Euclidean, Spherical, HyperIdeal are wired to call the appropriate `*_layout()` after Newton. CP-Euclidean (face-based) and Inversive-Distance (vertex-based) entries still require the user to call `*_layout()` by hand. | tutorial + plumbing in place; just needs to be copy-pasted into the two remaining entry headers | ~0.5 day |
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| **Named-parameter chaining: `\|`-operator only, no `.a().b().c()`.** Member-style chaining would need a patch to CGAL's upstream `parameters_interface.h`, which we treat as a read-only vendored dependency. The pipe operator is documented, ADL-discoverable, and equivalent in expressive power. | pipe shipped, member-chain deferred until upstream extension point exists | ~2 days (only if upstream PR is accepted) |
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| **Phase 9b-analytic: derivation complete, code uses block-FD.** The Schläfli-based analytic HyperIdeal Hessian is fully derived in [`hyperideal-hessian-derivation.md`](../math/hyperideal-hessian-derivation.md) (805 lines, all sign pitfalls covered). The shipped code still uses per-face block-FD (already 96× faster than the legacy full-FD path). | research-ready writeup; implementation gated on the reviewer's view of whether the additional ~6× is worth it | ~2 weeks |
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| **Doxygen `WARN_IF_UNDOCUMENTED = NO`.** With `EXTRACT_ALL = YES`, every symbol is in the generated HTML, but symbols without explicit doc comments show only their signature. Public API surface (entry functions, named-parameter helpers, traits typedefs) has hand-written Doxygen; internal helpers vary. | clean (0 warnings) under current policy; not yet enforced "no undocumented symbol" | ~3 days to drive `WARN_IF_UNDOCUMENTED = YES` to zero |
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| **`check-test-counts.sh` not wired into CI.** The script exists, runs locally, and gives the correct answer (23 + 234 = 257 / 0 skipped). CI does not yet fail on a mismatch. | local guard exists, CI integration pending next workflow touch | ~1 hour |
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| **CP-Euclidean and Inversive-Distance research-track entries.** Both ship a working DCE solver, but lack the auxiliary utilities the Euclidean / HyperIdeal entries have (curvature inspection helpers, edge-flip Delaunay maintenance for ID). Out of port scope; listed in [`research-track.md`](../roadmap/research-track.md). | research-track, not blocking | per-utility |
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| **`StereographicUnwrapper`, `CircleDomainUnwrapper`, `CuttingUtility`, `KoebePolyhedron`.** Mentioned in roadmap + research-track docs but not yet ported. Java versions still authoritative. | documented as Phase 11+ / optional | weeks each — explicit "out of port scope unless requested" |
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The honest framing for the meeting: **the porting layer hits its target
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for the 5 Phase-8b-Lite DCE entries; the hackability layer is
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demonstrably in place (3 tutorials, named-parameter chaining,
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Doxygen-HTML); the research-track items are scoped but not built.**
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---
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## Open questions for the external reviewer
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Items where the project would benefit from a second opinion:
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