all-backend ledger: milestone-1 regen prune (torch 1684→ 1485, jax 335→ 292)

[jobovy]

What

Milestone-1 reconsideration of the xfail-ledger (tests/backend_xfail.txt) — the policy's "major milestone where the ledger has permanently moved significantly", not a per-#892-integration regen. Source: regen run 27621760108 on regen/milestone-1-ledger, built from the full 13 jax + 13 torch fragments.

Burndown

backend	xfail	slow_skip	total ledger
jax	296 → 253	39 (held)	335 → 292 (−43)
torch	1683 → 1484	1 (held)	1684 → 1485 (−199)

backend_slow_skip.txt is byte-identical (deferred-slow tests are skipped in both modes, never regenerated — to be re-examined for vectorized entries at milestones).

The permanent move that justifies the prune

• backend: central coordinate coercion — fix systemic torch scalar-input rejection #960 central coordinate coercion (the torch scalar-input fix accounts for the bulk of the −199 torch drop).
• The landed P2.x potential migrations + Pspecial work.

One truncated shard (carry-forward)

The jax test_SpiralArmsPotential / test_potential / test_scf / test_MultipoleExpansionPotential / test_snapshotpotential shard hit the 75-min session-timeout (ran 259/410), so the 3 prior ledger entries among the 151 that didn't run are carried forward. torch ran all 410 of that shard, so no torch carry-forward. Every other shard ran to completion and is applied in full.

Validation

CI on this PR re-runs the full all-backend matrix in normal mode (applies this ledger); any dropped test that regresses is caught here. (An earlier revision of this PR built the ledger from only the first page of the run's 53 artifacts — an unpaginated listing — which understated it; rebuilt from the complete fragment set.)

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.93%. Comparing base (5fa34c4) to head (afa662e).
⚠️ Report is 1 commits behind head on feat/backends.

Additional details and impacted files

@@              Coverage Diff               @@
##           feat/backends     #969   +/-   ##
==============================================
  Coverage          99.93%   99.93%           
==============================================
  Files                247      247           
  Lines              39375    39375           
  Branches             839      841    +2     
==============================================
  Hits               39350    39350           
  Misses                25       25           

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[github-actions]

All-backend test status (jax / torch)

Commit aab4f3cfcbf1cc26139b8a64c6ac8775dfae4ded

Green is achieved via the checked-in xfail-ledger (tests/backend_xfail.txt, applied xfail(strict=False)), so the metric to watch is the shrinking xfail count (burndown), not a raw pass count. A FAIL/ERR is an un-ledgered regression (reds the run). Because the ledger is non-strict, a now-passing ledgered test is a plain pass here (no per-push XPASS); burndown candidates -- in both directions -- are surfaced by the scheduled regen run, which rewrites the ledger from real outcomes. deferred is a separate burndown: tests skipped because they are unrunnable under the backend until the port is vectorized (see tests/backend_slow_skip.txt), e.g. the jax spherical-DF sampling/quadrature tests pending the Track F DF migration.

Overall: jax: 1326 passed · 250 xfail · 730 deferred | torch: 965 passed · 1488 xfail · 1 deferred

Ledger size: 1737 entries (jax=253, torch=1484).

Test shard	jax	torch
actionAngle	✅ 113 pass · 88 xfail	✅ 33 pass · 168 xfail
sphericaldf	✅ 164 pass · 26 xfail · 28 deferred	✅ 8 pass · 210 xfail
conversion + util + misc	✅ 86 pass · 5 xfail · 1 deferred	✅ 46 pass · 46 xfail
potential + scf + multipole	✅ 234 pass · 20 xfail · 5 deferred	✅ 188 pass · 222 xfail
quantity + coords	✅ 293 pass · 43 xfail	✅ 197 pass · 139 xfail
orbit (energy/Jacobi + from_name)	✅ 0 pass · 0 xfail · 115 deferred	✅ 20 pass · 95 xfail
orbit + orbits (main)	✅ 0 pass · 0 xfail · 578 deferred	✅ 191 pass · 384 xfail
evolveddiskdf	✅ 35 pass · 0 xfail	✅ 32 pass · 3 xfail
jeans + dynamfric	✅ 17 pass · 2 xfail · 2 deferred	✅ 13 pass · 7 xfail · 1 deferred
qdf + pv2qdf + streamgapdf_impulse + noninertial	✅ 85 pass · 47 xfail · 1 deferred	✅ 28 pass · 105 xfail
streamgapdf	✅ 28 pass · 2 xfail	✅ 27 pass · 3 xfail
diskdf	✅ 129 pass · 0 xfail	✅ 112 pass · 17 xfail
streamdf + streamspraydf + streamTrack	✅ 142 pass · 17 xfail	✅ 70 pass · 89 xfail

Per-shard counts

Test shard	backend	pass	xfail	deferred	XPASS	fail	error
actionAngle	jax	113	88	0	0	0	0
actionAngle	torch	33	168	0	0	0	0
sphericaldf	jax	164	26	28	0	0	0
sphericaldf	torch	8	210	0	0	0	0
conversion + util + misc	jax	86	5	1	0	0	0
conversion + util + misc	torch	46	46	0	0	0	0
potential + scf + multipole	jax	234	20	5	0	0	0
potential + scf + multipole	torch	188	222	0	0	0	0
quantity + coords	jax	293	43	0	0	0	0
quantity + coords	torch	197	139	0	0	0	0
orbit (energy/Jacobi + from_name)	jax	0	0	115	0	0	0
orbit (energy/Jacobi + from_name)	torch	20	95	0	0	0	0
orbit + orbits (main)	jax	0	0	578	0	0	0
orbit + orbits (main)	torch	191	384	0	0	0	0
evolveddiskdf	jax	35	0	0	0	0	0
evolveddiskdf	torch	32	3	0	0	0	0
jeans + dynamfric	jax	17	2	2	0	0	0
jeans + dynamfric	torch	13	7	1	0	0	0
qdf + pv2qdf + streamgapdf_impulse + noninertial	jax	85	47	1	0	0	0
qdf + pv2qdf + streamgapdf_impulse + noninertial	torch	28	105	0	0	0	0
streamgapdf	jax	28	2	0	0	0	0
streamgapdf	torch	27	3	0	0	0	0
diskdf	jax	129	0	0	0	0	0
diskdf	torch	112	17	0	0	0	0
streamdf + streamspraydf + streamTrack	jax	142	17	0	0	0	0
streamdf + streamspraydf + streamTrack	torch	70	89	0	0	0	0