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AMReX-Astro

3 indexed repositories · View on GitHub

Castro
Castro (Compressible Astrophysics): An adaptive mesh, astrophysical compressible (radiation-, magneto-) hydrodynamics simulation code fo...

C++ · 340 stars
Nyx
An adaptive mesh, N-body hydro cosmological simulation code

C++ · 105 stars
Microphysics
common astrophysical microphysics routines with interfaces for the different AMReX codes

C++ · 43 stars

Beginner friendly Everything

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Hybrid momentum references nonexistent MOL face arrays Open

ai-code-audit sdc

Difficulty 3/5 1-2 days Newbie friendliness 68/100

AMReX-Astro/Castro#3401 · Opened Sep 16, 2026
The stage CFL check repeatedly inspects the unchanged old state Open

ai-code-audit sdc

Difficulty 4/5 3-5 days Newbie friendliness 52/100

AMReX-Astro/Castro#3400 · Opened Sep 16, 2026
Saved SDC fluxes omit the endpoint contribution Open

ai-code-audit sdc

Difficulty 4/5 3-5 days Newbie friendliness 55/100

AMReX-Astro/Castro#3399 · 1 comment · Opened Sep 16, 2026
The SDC4 pressure-work source has only second-order derivatives Open

ai-code-audit sdc

Difficulty 5/5 Over a week Newbie friendliness 42/100

AMReX-Astro/Castro#3398 · 1 comment · Opened Sep 16, 2026
Self-gravity is frozen at the old-time density during SDC sweeps Open

ai-code-audit gravity sdc

Difficulty 5/5 Over a week Newbie friendliness 45/100

AMReX-Astro/Castro#3397 · 1 comment · Opened Sep 16, 2026
SDC2 evaluates time-dependent sources at the end of the step Open

ai-code-audit sdc

Difficulty 4/5 3-5 days Newbie friendliness 64/100

AMReX-Astro/Castro#3395 · Opened Sep 16, 2026
Newton subdivision silently changes the equation being solved Open

ai-code-audit sdc

Difficulty 5/5 Over a week Newbie friendliness 45/100

AMReX-Astro/Castro#3394 · Opened Sep 16, 2026
The VODE-only option does not solve the SDC equation Open

ai-code-audit sdc

Difficulty 4/5 3-5 days Newbie friendliness 48/100

AMReX-Astro/Castro#3393 · Opened Sep 16, 2026
SDC2 conducts heat when diffuse_temp is disabled Open

ai-code-audit sdc

Difficulty 3/5 1-2 days Newbie friendliness 68/100

AMReX-Astro/Castro#3392 · Opened Sep 16, 2026
True SDC ignores castro.do_react Open

ai-code-audit sdc

Difficulty 3/5 1-2 days Newbie friendliness 64/100

AMReX-Astro/Castro#3391 · Opened Sep 16, 2026
Debye-Huckel shortcut creates a discontinuous screening factor Open

ai-code-audit screening

Difficulty 4/5 3-5 days Newbie friendliness 55/100

AMReX-Astro/Microphysics#2097 · 1 comment · Opened Sep 14, 2026
Screening temperature derivatives do not differentiate the returned value Open

ai-code-audit screening

Difficulty 4/5 3-5 days Newbie friendliness 72/100

AMReX-Astro/Microphysics#2096 · Opened Sep 14, 2026
Approximate arctangent introduces jumps in screening free energies Open

ai-code-audit screening

Difficulty 4/5 3-5 days Newbie friendliness 66/100

AMReX-Astro/Microphysics#2095 · 1 comment · Opened Sep 14, 2026
Documented Debye-Huckel screening option cannot be built Open

ai-code-audit screening

Difficulty 3/5 1-2 days Newbie friendliness 88/100

AMReX-Astro/Microphysics#2094 · Opened Sep 14, 2026
True SDC O4 normalizes species before enforcing positive cell-centered density Open

ai-code-audit sdc

Difficulty 4/5 3-5 days Newbie friendliness 48/100

AMReX-Astro/Castro#3385 · Opened Sep 13, 2026
construct_old_react_source() silently overwrites Sburn in the O4 averaged-input path Open

ai-code-audit sdc

Difficulty 4/5 3-5 days Newbie friendliness 52/100

AMReX-Astro/Castro#3384 · Opened Sep 13, 2026
MHD plot variable eint_E includes magnetic energy in the reported internal energy Open

ai-code-audit mhd

Difficulty 4/5 3-5 days Newbie friendliness 48/100

AMReX-Astro/Castro#3380 · Opened Sep 12, 2026
NSE derivatives remain nonzero outside the clamped table domain Open

ai-code-audit nse

Difficulty 3/5 1-2 days Newbie friendliness 68/100

AMReX-Astro/Microphysics#2075 · Opened Sep 8, 2026
NSE EOS Jacobians use cubic derivatives when linear interpolation is selected Open

ai-code-audit nse

Difficulty 4/5 3-5 days Newbie friendliness 74/100

AMReX-Astro/Microphysics#2074 · Opened Sep 8, 2026
Cubic NSE interpolation can turn neutrino cooling into heating Open

ai-code-audit nse

Difficulty 3/5 1-2 days Newbie friendliness 72/100

AMReX-Astro/Microphysics#2072 · 2 comments · Opened Sep 8, 2026
The default energy inversion does not report iteration exhaustion Open

ai-code-audit nse

AMReX-Astro/Microphysics#2071 · 1 comment · 1 assignee · Opened Sep 7, 2026
nse_solver: The energy Jacobian differentiates at fixed Ye, but the residual does not Open

ai-code-audit nse

AMReX-Astro/Microphysics#2070 · 1 assignee · Opened Sep 7, 2026
SDC cleanup normalizes invalid species before checking for burn failure Open

ai-code-audit integrator sdc

Difficulty 3/5 1-2 days Newbie friendliness 68/100

AMReX-Astro/Microphysics#2066 · Opened Sep 7, 2026
SDC temperature cutoff discards advective sources as well as reactions Open

ai-code-audit integrator

Difficulty 3/5 1-2 days Newbie friendliness 76/100

AMReX-Astro/Microphysics#2059 · Opened Sep 7, 2026
VODE numerical Jacobian corrupts later columns when abundances are renormalized Open

ai-code-audit integrator

Difficulty 3/5 1-2 days Newbie friendliness 72/100

AMReX-Astro/Microphysics#2058 · 1 comment · Opened Sep 7, 2026
Duplicate reactant/product species not accumulated correctly in generic RHS Open

Difficulty 3/5 1-2 days Newbie friendliness 70/100

AMReX-Astro/Microphysics#2053 · Opened Sep 5, 2026
experiment with AMReX_CompensatedSum.H Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

AMReX-Astro/Microphysics#2043 · Opened Aug 11, 2026
Question About Subcycles Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

AMReX-Astro/Castro#3361 · 2 comments · Opened Jul 15, 2026
add state checks for SDC to Rosenbrock Open

integrator

Difficulty 3/5 1-2 days Newbie friendliness 58/100

AMReX-Astro/Microphysics#2019 · Opened Jun 20, 2026
Question regarding missing input data Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

AMReX-Astro/Nyx#115 · Opened Jun 1, 2026
Architectural approach: Simulating FLRW expansion via "stretchy" static grids Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

AMReX-Astro/Nyx#111 · Opened Apr 29, 2026
are we filling y_e in the burn_state that get's passed to the nets? Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

AMReX-Astro/Microphysics#1980 · Opened Apr 23, 2026
try QSS for primordial chem Open

enhancement

AMReX-Astro/Microphysics#1972 · 3 comments · 1 assignee · Opened Mar 27, 2026
mhd: prim_half() uses Step 6 intermediate fluxes instead of final Step 9 fluxes in unsplit CTU/CT update Open

ai-code-audit mhd

AMReX-Astro/Castro#3326 · 1 assignee · Opened Mar 24, 2026
new method for temporary FABs Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

AMReX-Astro/Castro#3319 · 2 comments · Opened Mar 19, 2026
Modifying the CFL for a custom diffusion term Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

AMReX-Astro/Castro#3317 · 1 comment · Opened Mar 16, 2026
util/hybrj: invalid xtol currently hard-aborts instead of returning solver status Open

ai-code-audit

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

AMReX-Astro/Microphysics#1961 · Opened Mar 11, 2026
util/hybrj: NaN/Inf handling in enorm can cause false convergence Open

ai-code-audit

Difficulty 4/5 3-5 days Newbie friendliness 35/100

AMReX-Astro/Microphysics#1960 · Opened Mar 11, 2026
Potential indexing/ghost-validity issue: `add_sdc_source_to_states()` reads neighbor cells (`i-1/j-1/k-1`) without local ghost-fill Open

ai-code-audit sdc

Difficulty 4/5 3-5 days Newbie friendliness 35/100

AMReX-Astro/Castro#3301 · 1 comment · Opened Mar 6, 2026
RKC: actual_integrator.H and actual_integrator_sdc.H share the same include guard Open

ai-code-audit integrator

Difficulty 1/5 Under an hour Newbie friendliness 68/100

AMReX-Astro/Microphysics#1954 · Opened Mar 5, 2026
he-burn approximate rates need denominator guard Open

ai-code-audit

Difficulty 4/5 3-5 days Newbie friendliness 45/100

AMReX-Astro/Microphysics#1947 · 1 comment · Opened Mar 3, 2026
RHS Jacobian filter includes intermediate reactions Open

ai-code-audit

Difficulty 2/5 1-3 hours Newbie friendliness 52/100

AMReX-Astro/Microphysics#1945 · Opened Mar 3, 2026
cj_detonation density grid mismatch and missing Finalize Open

ai-code-audit

Difficulty 2/5 1-3 hours Newbie friendliness 58/100

AMReX-Astro/Microphysics#1944 · Opened Mar 3, 2026
metal_chem parser OOB on blank/comment lines Open

ai-code-audit

AMReX-Astro/Microphysics#1943 · 1 assignee · Opened Mar 3, 2026
Not masking in the SCF diagnostic code Open

self-consistent field init

Difficulty 3/5 1-2 days Newbie friendliness 45/100

AMReX-Astro/Castro#3286 · Opened Mar 2, 2026
Point_mass_location Open

gravity

Difficulty 4/5 3-5 days Newbie friendliness 25/100

AMReX-Astro/Castro#3281 · 4 comments · Opened Mar 2, 2026
SCF diagnostics use stale `phi` scratch data after `multilevel_solve_for_new_phi()` Open

ai-code-audit bug :bug: self-consistent field init

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

AMReX-Astro/Castro#3255 · Opened Feb 24, 2026
`do_hscf_solve()` caches `finest_level` once, but calls `RegridOnly()` inside the iteration loop Open

ai-code-audit bug :bug: self-consistent field init

Difficulty 4/5 3-5 days Newbie friendliness 38/100

AMReX-Astro/Castro#3254 · 2 comments · Opened Feb 24, 2026
`hse_fill` ignores HSE Newton non-convergence on GPU for implemented boundaries Open

ai-code-audit BCs bug :bug: GPU

Difficulty 4/5 3-5 days Newbie friendliness 45/100

AMReX-Astro/Castro#3252 · Opened Feb 24, 2026
MHD interface reconstruction and HLLD flux path skip auxiliary passives (`QFX/UFX`) Open

ai-code-audit bug :bug: mhd

Difficulty 3/5 1-2 days Newbie friendliness 58/100

AMReX-Astro/Castro#3250 · Opened Feb 24, 2026

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