# Mendix™ versions mxto has been tested against (auditable)

> **What this is:** the exact Mendix versions mxto has been certified against, and what "certified"
> means for each. Every row is a **byproduct of a cert run** (`domain round-trip` tool), not a hand
> count, and it is re-runnable on demand. **What it is not:** a claim that mxto works on *every* Mendix minor
> version. We list precisely what we tested so you can judge the gap for your estate.

## Portfolio cert: 8 apps, MX 7.23 → 11.6

| App (anonymized) | Mendix `_ProductVersion` | Domain units | Atoms | Round-trip match | Full mxbuild gate |
|---|---|---:|---:|:---:|:---:|
| Workforce portal | **7.23.8.58888** | 109 | 63,167 | 100.0% | ✅ BUILD SUCCEEDED (mono + JDK 8) |
| Agritech IoT | **9.24.20.33307** | 158 | 87,191 | 100.0% | ✅ BUILD SUCCEEDED (JDK 11) |
| CME platform | **9.24** | 139 | 66,183 | 100.0% | cert-only (sweep) |
| Warehouse scanner | **9.24.2** | 40 | 19,518 | 100.0% | cert-only (sweep) |
| Debt consolidation | **9.24** | 344 | 268,312 | 100.0% | cert-only (sweep) |
| Financial-services estate (EFG) | **10.24.13.86719** | 360 | 334,797 | 100.0% | ✅ BUILD SUCCEEDED (JDK 21) |
| Labour costing | **11.6** | 35 | 9,494 | 100.0% | cert-only (sweep) |
| Claudius (AI-built) | **11.6.4** | 33 | 5,849 | 100.0% | ✅ BUILD SUCCEEDED (JDK 21) |
| **Total** | **7.23 → 11.6** | **1,218** | **854,511** | **100.0%** | **4/4 gate apps green** |

## What the two tiers mean
- **Round-trip match (all 8 apps):** the model is extracted → re-emitted → diffed byte-for-byte against
  the original. 100% = every domain unit (entity / association / enum, expanded to 854,511 atomic
  properties) survived with zero loss. A drop would appear as a diff; there are none.
- **Full mxbuild gate (4 apps, one per major: MX 7, 9, 10, 11):** the *re-emitted* model was compiled
  with Mendix's own build tools to a deployable MDA, reaching BUILD SUCCEEDED. The other four are
  certified for round-trip fidelity but were not put through a full build (cert-only "sweep" apps).

## What we do NOT yet claim
- **Not every minor version.** We have direct evidence for 7.23.8, 9.24.x, 10.24.13, 11.6 / 11.6.4, but
  not for every release in the 7/8/9/10/11 lines. MX 8 specifically is carried by build recipes, not a
  corpus app in this matrix.
- **Deprecated attribute types** (`Currency`, `HashString`, `Binary`) appear in no app in this
  portfolio. They are covered by tests, not by a live corpus witness. `Float` survives only in the MX 7 app
  (both instances round-trip exactly).
- Your estate may use a construct or version combination outside this set. The honest answer is: we'll
  run a **read-only round-trip report against a sample of your own model** and show you the result
  before you commit to anything.

*Source: mxto certification run (cross-version round-trip byproduct). App identities anonymized for publication;
real mapping held internally.*