Run Identity

Every pipeline execution is identified by a deterministic run_fingerprint computed as:

run_fingerprint = sha256({
    config: sha256(canonical_config),
    roi: roi_hash,
    inputs: [sha256, size_bytes, mtime]
})

Where:

• canonical_config is the normalized configuration with sorted keys.
• roi_hash represents the ROI geometry (bbox or GeoJSON polygon).
• input_fingerprints capture file hashes, sizes, and mtimes for inputs.

Why deterministic fingerprints matter

• Enables reproducible runs and artifact comparisons.
• Makes outputs immutable by default.
• Simplifies caching and downstream automation.

When any of the components changes, the fingerprint changes, producing a new run directory.