Do you know what you're doing?

Not at all. If you have any issues let me know and I will try my best.

Which MIR version should I install?

Factorio 2.1 → 4.0.21000 zip
Factorio 2.0 → 4.0.20000 zip
Factorio 1.1 → 4.0.11000 zip
Factorio 1.0 → 4.0.10000 zip

For source x.y.zz, the target packages are x.y.210zz, x.y.200zz, x.y.110zz, and x.y.100zz.
All versions for Factorio 1.1 and earlier are missing key features due to lack of engine support for mods.

Does MIR support every mod or modpack?

MIR tries to gracefully support any mod loaded using structural compatibility and exact evidence-backed profiles, but does not guess arbitrary hidden Lua behavior. It can apply certified behavior, preserve an existing owner, request an extension or review, omit an unsupported target surface, or report a hard-safety failure.

Why was a technology skipped or preserved?

Typical reasons include another valid owner, an unavailable target effect, unreachable science, a missing or cyclic prerequisite, a recycling or recovery process family, or custom semantics requiring an extension or review. Check MIR diagnostics or export a support bundle.

Can I change costs, effects, or maximum levels?

Yes. MIR exposes target-appropriate startup settings for research families, costs, growth, time, effect scaling, science policy, and maximum levels. Unsupported settings are omitted or hidden on reduced targets rather than presented as inert controls.

Can mod developers add first-party MIR support?

Yes. The separate developer preview includes the data-only MIR Extension Protocol, schemas, templates, SDK bindings, environment locks, diagnostics, and conformance tools. Extensions cannot bypass hard safety or mutate player prototypes directly.

How do I report an issue?

Open a Mod Portal discussion or GitHub issue with the Factorio version, MIR package version, exact mod list and startup settings, factorio-current.log, a save or minimal reproducer, and the MIR support bundle when available. Never include passwords, API tokens, signing material, or unrelated private files.

Developer previews are separate GitHub downloads requiring manual installation, not downloadable on the Mod Portal.

I have a different question...

Open a discussion and I'll respond as soon as I see it!