> ## Documentation Index
> Fetch the complete documentation index at: https://zenskar.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Documentation version to backend build compatibility matrix

> Which documentation version describes each backend build, keyed on backend_calver.

This matrix maps backend builds to documentation versions, keyed on `backend_calver`. Each `backend_calver` is globally unique and appears in exactly one row. For the version string format and who owns each segment, see [Versioning logic](https://zenskar.com/docs/meta/versioning-logic).

## How to look up compatibility

1. Find your backend build's `backend_calver` in the **Compatibility** table.
2. That row's documentation version describes your build.
3. If your `backend_calver` isn't listed, the build hasn't been reviewed yet. Ask in #technical-writing.
4. If your `backend_calver` is earlier than `20240301`, the build predates the versioning scheme and no documentation version describes it. See note (1).

## Documentation versions

| Documentation version | Previous label | Type | Notes |
| - | - | - | - |
| — | v1 | Not available | Predates the versioning scheme. Not selectable in the version dropdown. See note (1) |
| `baobab.20240301` | v2 | Stable | First documentation version under the current scheme |
| `cedar.ALPHA.20260301` | v3 | Pre-release | Not validated for production |

## Compatibility

| `backend_calver` | Documentation version | Status | Notes |
| - | - | - | - |
| `20240301` | `baobab.20240301` | Supported | Build this version was published against |
| `20260301` | `cedar.ALPHA.20260301` | Supported | Build this version was published against. Pre-release documentation |

## Legend

**Documentation version types**

* **Stable:** released documentation version with no quality tag.
* **Pre-release:** documentation version with a quality tag (`ALPHA`, `BETA` or `RC`). Not validated for production.
* **Not available:** legacy version with no entry in the version dropdown.

**Build statuses**

* **Supported:** tested; the documentation version accurately describes this backend build.
* **Supported with caveats:** tested; accurate with limitations described in the notes.
* **Untested:** listed but not yet reviewed. Do not rely on this mapping.

## Notes

1. `v1` predates the tree-name scheme and has no `backend_calver`, so it cannot be looked up by calver. It is referenced here by its legacy label only and is not retrofitted with a tree name.

## Maintenance

* Every new `backend_calver` triggers a matrix review and gets its own row.
* Each `backend_calver` appears in exactly one row. A documentation version can cover multiple `backend_calver` values.
* No cell is left blank; use "—" where a value does not apply.
* Rows are never deleted. Every status change is recorded in the changelog below with a date and reason.


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