Loom PlateSolve — blind astrometric solver

Usage: loom-solve [OPTIONS] <IMAGE.fits>

Input:
  -i, --input PATH       Input FITS (alternative to positional path)
      --gaia PATH        Local Gaia XPSD file; repeatable (optional accelerator)
      --offline          Use embedded/local/cached catalogues only
      --ra DEG --dec DEG  Approximate centre (ICRS degrees; supply both)
      --scale ARCSEC     Approximate image scale in arcseconds/pixel
      --threads N        Worker count (default: automatic)

Output:
      --json             Print exact WCS as JSON instead of FITS WCS cards
  -o, --output PATH      Write result to a new file instead of stdout
      --sidecar          Write IMAGE.fits.wcs (or .wcs.json with --json)
      --write-wcs        Write solved FITS to --output (requires new output path)

Execution:
      --gpu              Enable GPU acceleration (default; CPU fallback available)
      --no-gpu           Use CPU only
  -q, --quiet            Suppress progress logs; errors remain on stderr
  -v, --verbose          Include detailed solver diagnostics
      --log-level LEVEL  off, error, warn, info, debug, trace
      --color MODE       auto, always, never (default: auto; honors NO_COLOR)
  -h, --help             Show this help
  -V, --version          Show version and release source revision

Results use stdout; logs and errors use stderr. Existing files are never overwritten.
LOOM_SOLVE_GAIA supplies OS-separated paths when --gaia is omitted.
Exit codes: 0 success, 1 unsolved, 2 usage, 3 input, 4 output, 130 cancelled.