mdbook-quiz v0.4.0 incompatible with mdbook v0.5.x

[yan-pi]

Description

mdbook-quiz v0.4.0 fails when used with mdbook v0.5.2 (the latest version) due to a version incompatibility.

Error
When running `mdbook build` with mdbook v0.5.2 and mdbook-quiz v0.4.0:
Unable to parse the input
WARN Error writing the RenderContext to the backend, Broken pipe (os error 32)
ERROR The "quiz" preprocessor exited unsuccessfully with exit status: 1 status

Root Cause

Looking at the Cargo.toml, mdbook-quiz v0.4.0 explicitly pins to mdbook v0.4.45:

mdbook = "= 0.4.45"

This prevents it from working with mdbook v0.5.x.

Workaround:

Downgrade mdbook to v0.4.45:

cargo install mdbook --version 0.4.45 --locked

Request

Could you please:

1. Release a new version (v0.5.0?) that supports mdbook v0.5.x, or
2. Clarify the roadmap for mdbook 0.5.x compatibility

I noticed there have been commits since v0.4.0 (latest on Oct 8, 2025). Does the main branch already support mdbook v0.5.x?

Environment

• mdbook: v0.5.2
• mdbook-quiz: v0.4.0
• OS: macOS

[willcrichton]

My driving use case is cognitive-engineering-lab/rust-book which is still on mdbook v0.4. I would accept a contribution to update mdbook-quiz to mdbook v0.5, but don't have the time / plans to do this my self right now.

[yan-pi]

hey @willcrichton - I can pick this up and try update for mdbook-quiz to support 0.5.x, if you don't mind.

[padamson]

+1 — we're blocked on this for a book project using mdbook 0.5. The PR (#62) looks good but the JS build dependency on depot makes it hard to install from the branch. Would love to see this merged and released.