Determinism

Same graph + same defs → byte-identical API JSON. Tested.

What that includes:

• Stable node ids in emit order (sorted)
• Inputs emitted in def order
• No hidden RNG in the compiler
• Explicit seeds, recorded in run.json
• graphHash, compile hash, objectInfoHash
• instantiateTemplate renumbers n1..nN in topo order

What it does not include:

• GPU bit-identical images across drivers / cards
• Model kernels that are themselves nondeterministic
• Two machines with different checkpoint files that share a name
• Comfy frontend revisions that change /object_info

Environment lock reports defs drift. It cannot freeze CUDA.

Replay the exact /prompt body from run.json.compiledJson (as a string). That reproduces the request. The pixels are Comfy's problem.

Locks · Reproducible runs