radixark/miles

Weight update bitwise correctness checker

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#405 opened on Jan 6, 2026

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enhancementhelp wanted

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Description

Currently I have already supported some weight checking logic. It would be great if we make it a test, and/or check every time. I do not have time recently thus write this as an issue.

I guess there may be a few things to do:

  • Try to enable those flags and see whether there are any issues (or it works well and only enable that flag), especially if we want to enable it by default for all cases
  • May implement some logic like bf16 training fp8 rollout checker etc
  • May support things like "compute checksum in miles weight, compute checksum in sglang weight (after updates), check whether they are identical"

Contributor guide

Research direction
Explore enabling existing weight checking flags and verify they work. Then implement tests for weight update correctness, possibly including checksums between miles and sglang weights.
Tech stack
python
Domain
machine learningbackend
Issue type
Test
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
PythonMachine Learning
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40