fix(lammps): emit valid spin atom style sections - #1032
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Mark data files with spin vectors as Atoms # spin and teach automatic parsing about the official spin atom style. Add a LAMMPS integration regression; the previous test only inspected text while the atomic header made LAMMPS reject the extra columns. Coding-Agent: Codex Codex-Version: codex-cli 0.144.4 Model: gpt-5.6-sol Reasoning-Effort: xhigh
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📝 WalkthroughWalkthroughLAMMPS spin atom-style support now covers column mapping, spin parsing, output annotation, API documentation, round-trip tests, and optional LAMMPS integration testing. ChangesLAMMPS spin support
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🔵 Low · up to The change makes generated spin data use valid LAMMPS headers and enables spin-style parsing. The PR is mergeable with follow-up: document the new spins return field and add a timeout so a stalled LAMMPS process cannot hang CI. Sequence Diagram(s)sequenceDiagram
participant dpdata.System
participant LAMMPSLmpFormat
participant LAMMPSDataFile
participant LAMMPSExecutable
dpdata.System->>LAMMPSLmpFormat: load generated spin data
LAMMPSLmpFormat->>LAMMPSDataFile: read spin vectors and magnitudes
LAMMPSLmpFormat->>LAMMPSExecutable: provide atom_style spin data
LAMMPSExecutable-->>LAMMPSLmpFormat: run zero-step validation
🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Merging this PR will improve performance by 15.41%
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Efficiency | |
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| ⚡ | WallTime | test_import |
12.4 ms | 10.7 ms | +15.41% |
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Comparing njzjz-bot:fix/issue-885 (84a9323) with master (b3c69fe)
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## master #1032 +/- ##
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+ Coverage 86.87% 88.11% +1.23%
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Files 89 91 +2
Lines 8266 9563 +1297
==========================================
+ Hits 7181 8426 +1245
- Misses 1085 1137 +52 ☔ View full report in Codecov by Harness. 🚀 New features to boost your workflow:
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The #885 fix looks correct and matches LAMMPS's atom_style spin layout (id type x y z spx spy spz sp), and the assertIn("Atoms # spin", ...) test genuinely fails on pre-fix code (which emitted # atomic). One coordination note with the open PR #1020, which modifies the same get_spins guard -- see inline.
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| def get_spins(lines: list[str], atom_style: str = "atomic") -> np.ndarray | None: | ||
| if atom_style not in {"atomic", "spin"}: |
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Heads-up: the still-open PR #1020 (fix/issue-995) adds this exact guard (if atom_style not in {"atomic", "spin"}: return None) -- only the comment placement differs. They branch from a shared merge-base, so git merge-tree shows one add/add conflict right here; whichever of #1020 / #1032 merges second will hit it (cosmetic -- identical logic).
This PR is the natural completion of #1020: #1020's whitelist references "spin" but never registered it in ATOM_STYLE_COLUMNS, so that arm was dead code -- the "spin" entry added here (line 25) makes it live, and emitting Atoms # spin fixes the # spin-labeled-file regression #1020 introduced. Suggest sequencing them: merge one, then rebase the other and drop the duplicate guard hunk (keep #1020's detect_atom_style neutral-charge fix + tests, keep #1032's dict entry + writer).
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Agreed on the sequencing. No code change is appropriate until either #1020 or #1032 merges. After the first PR lands, the other branch should be rebased and the duplicate get_spins guard hunk dropped while preserving #1020's detection fixes and #1032's real spin-style definition and writer support. I am leaving this thread unresolved until that coordination step can be completed.
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Rechecked the coordination state: both #1020 and #1032 are still open, and git merge-tree --write-tree still reports the expected content conflict in get_spins. Because neither prerequisite PR has landed, removing either branch's guard now would make that PR incomplete or unnecessarily make one PR depend on the other.
No code change is appropriate yet. I am leaving this thread unresolved as requested; after the first PR merges, the remaining branch should be rebased and the duplicate guard hunk dropped while retaining its independent behavior and tests.
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Reviewed the spin atom-style layout, writer annotation, auto-detection, and round trip. The official column layout is represented correctly and the relevant LAMMPS tests pass. I found no code-level blocker. This PR is authored by njzjz-bot, so GitHub does not permit this account to self-approve; this COMMENT review records the completed review instead. The Read the Docs failure should be refreshed after rebasing, and the expected overlap with #1020 should be resolved in merge order.
Process note: the Codex usage allowance is about to reset, so I am spending the remaining token budget now on this review.
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Preserve the atom-style guard from upstream deepmodeling#1020 and route explicit spin-style data through the legacy spin-column parser. Coding-Agent: ChatGPT Model: GPT-5.6 Sol
Head branch was pushed to by a user without write access
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Inline comments:
In `@dpdata/plugins/lammps.py`:
- Line 63: Update the Returns documentation for the relevant data-loading
function to document the spin-style input behavior: when the `spin` option is
used, return the values in `data["spins"]` alongside the existing `charges` and
`molecule_ids` fields.
In `@tests/test_lammps_spin.py`:
- Around line 82-103: Add a finite timeout to the subprocess.run call in
test_dump_input_is_accepted_by_lammps, ensuring a stalled LAMMPS process raises
a test-visible timeout error instead of blocking the suite.
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Fix all unresolved CodeRabbit comments on this PR:
- Push a commit to this branch (recommended)
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dpdata/formats/lammps/lmp.pydpdata/plugins/lammps.pytests/test_lammps_spin.py
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Document the spin return field and bound the LAMMPS validation subprocess runtime. Coding-Agent: ChatGPT Model: GPT-5.6 Sol
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3 participants
Fixes #885.
Mark spin-vector data as
Atoms # spin, support automatic spin-style parsing, and validate the generated file with LAMMPS.Tests:
cd tests && python -m unittest test_lammps_spin(LAMMPS integration skips when the executable/package is unavailable).Why existing tests missed it: The previous test only inspected text; it emitted nine-column spin rows under an atomic-style header that LAMMPS rejects.
Coding agent: Codex
Codex version: codex-cli 0.144.4
Model: gpt-5.6-sol
Reasoning effort: xhigh
Summary by CodeRabbit
New Features
spinatom-style data.Bug Fixes
spinoratomicbased on available data.Tests