Usage: pdb2reaction scan [OPTIONS]
Bond-length driven scan with staged harmonic restraints and relaxation.
Options:
-v, --verbose LEVEL Console verbosity 0-3 (default 2). 0=silent;
1=milestones only; 2=+optimizer cycle tables,
per-stage timing, VRAM, deliverable paths;
3=everything (full config blocks, per-file
paths, DEBUG logging). [0<=x<=3]
--help-advanced Show all options (including advanced settings)
and exit.
-i, --input FILE Input structure file (.pdb, .xyz, _trj.xyz,
...). [required]
-s, --scan-lists TEXT Scan targets: inline Python literal (e.g.
'[(1,5,1.4)]') or a YAML/JSON spec file path.
Multiple inline literals define sequential
stages.
-q, --charge INTEGER Total charge. Required for non-.gjf inputs
unless --ligand-charge is provided (PDB inputs
or XYZ/GJF with --ref-pdb).
--workers INTEGER MLIP predictor workers; >1 spawns a parallel
predictor. NOTE: the analytical Hessian raises
a RuntimeError when workers>1; run with
--workers 1 for Hessian-based modes.
[default: 1]
--workers-per-node INTEGER Workers per node when using a parallel MLIP
predictor (workers>1). [default: 1]
-l, --ligand-charge TEXT Total charge or per-resname mapping (e.g.,
GPP:-3,SAM:1) used to derive charge when -q is
omitted (requires PDB input or --ref-pdb).
-m, --multiplicity INTEGER Spin multiplicity (2S+1).
--one-based / --zero-based Interpret (i,j) indices in --scan-lists as
1-based (default) or 0-based. [default: one-
based]
--max-step-size FLOAT Maximum change in any scanned bond length per
step [Å]. [default: 0.2]
--bias-k FLOAT Harmonic well strength k [eV/Å^2]. Defaults to
YAML bias.k (BIAS_KW['k']=300 in defaults.py)
when omitted; explicit CLI value overrides
YAML.
--relax-max-cycles INTEGER Maximum optimizer cycles per grid relaxation.
When explicitly provided, used unless YAML
sets opt.max_cycles. [default: 10000]
--opt-mode [grad|hess] Relaxation mode: grad (=LBFGS) or hess (=RFO).
[default: grad]
--freeze-links / --no-freeze-links
Freeze parent atoms of cap hydrogens (PDB
input or XYZ/GJF with --ref-pdb). [default:
freeze-links]
--freeze-atoms TEXT Comma-separated 1-based atom indices to freeze
(e.g., '1,3,5').
--dump / --no-dump Write per-step optimizer trajectory files.
scan_trj.xyz and scan.pdb are always written
to out-dir regardless of this flag. [default:
no-dump]
--convert-files / --no-convert-files
Convert XYZ/TRJ outputs into PDB/GJF
companions based on the input format.
[default: convert-files]
--ref-pdb FILE Reference PDB topology to use when the input
is XYZ/GJF (keeps XYZ coordinates).
-o, --out-dir TEXT Base output directory. [default:
./result_scan/]
--thresh [gau_loose|gau|gau_tight|gau_vtight|baker|never]
Convergence preset (gau_loose|gau|gau_tight|ga
u_vtight|baker|never).
--config FILE Base YAML configuration file applied before
explicit CLI options.
--preopt / --no-preopt Pre-optimize the initial structure without
bias before the scan. [default: no-preopt]
-b, --backend [uma|orb|mace|aimnet2]
MLIP backend. [default: uma]
--solvent TEXT Implicit solvent name for xTB correction (e.g.
'water'). 'none' to disable. [default: none]
--solvent-model [alpb|cpcmx] xTB solvent model. [default: alpb]
--print-parsed / --no-print-parsed
Print parsed scan targets after resolving
--scan-lists. [default: no-print-parsed]
--endopt / --no-endopt After each stage, run an additional unbiased
optimization of the stage result. [default:
no-endopt]
--out-json / --no-out-json Write machine-readable result.json to out_dir.
[default: no-out-json]
--dry-run / --no-dry-run Resolve and validate options (input,
charge/spin parity, --scan-lists parse) and
print the planned scan, then exit without
running any optimization. [default: no-dry-
run]
--coord-type [cart|redund|dlc|tric]
Optimization coordinate system
(cart|redund|dlc|tric). cart is the reliable
default used for the published results; dlc
speeds up torsion-rich optimizations.
--print-every INTEGER RANGE Print optimizer status every N cycles (debug
knob). [x>=1]
--precision [fp32|fp64] MLIP backend precision: fp32 (default) or
fp64. Routed to backend-specific kwargs (UMA
precision / ORB precision / MACE
default_dtype). aimnet2: fp32 no-op; fp64
rejected.
--backend-model TEXT Model variant for the selected --backend (e.g.
uma-s-1p1 / uma-m-1p1 for uma,
orb_v3_conservative_omol for orb, MACE-OMOL-0
/ MACE-OFF23_small for mace). Default: the
backend's built-in model.
--calc-file FILE Python file exposing get_calculator(...) -> an
ASE Calculator, used as the energy/gradient
backend (overrides --backend). Couples GFN-xTB
/ DFTB+ / any ASE engine. See --calc-factory.
--calc-factory TEXT Name of the callable in --calc-file that
returns an ASE Calculator (or a module-level
Calculator instance). [default:
get_calculator]
--deterministic / --no-deterministic
Strict bit-reproducible GPU runs
(deterministic algorithms + index_reduce_
shim). Slower; raises if unsupported. Default
off.
--allow-charge-mult-mismatch Skip the cluster charge/multiplicity electron-
parity check (logs that it was skipped). For
an intentional open-shell or modified-residue
cluster.
-h, --help Show this message and exit.