# `GgenIgniter.Engine.Qlever`
[🔗](https://github.com/seanchatmangpt/ggen_igniter/blob/v26.9.8/lib/ggen_igniter/engine.ex#L91)

Adapts `GgenIgniter.Query.Qlever` (real, remote QLever HTTP) to
`GgenIgniter.Engine`.

`:gno` and `:tesla` are both `optional: true` in `mix.exs` (see the comment
there). Neither is referenced here at compile time (no struct patterns, no
aliases into `Gno`/`Tesla`) -- every reference is a plain remote call or a
bare atom (`Application.ensure_all_started(:tesla)`), so this module always
compiles regardless of whether a consumer has those deps. `prepare!/2` does
add real `Code.ensure_loaded?/1` runtime guards, though: without them, a
consumer missing `:gno`/`:tesla` would still hit `--engine qlever` and get a
raw `MatchError` (from `Application.ensure_all_started(:tesla)` returning
`{:error, ...}`) instead of a clear, actionable message -- and would hit that
confusing error before ever reaching `GgenIgniter.Query.Qlever.load_store!/2`
(whose own stub, compiled when `:gno` is missing, raises the same message).

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*Consult [api-reference.md](api-reference.md) for complete listing*