Binary/text fixtures consumed by the Playwright smoke specs. Keep this directory small; reviewers need to understand each byte on disk.

Minimum valid AdaptiveLearner backup archive: one book with one chapter, no assets. Used by smoke/import-wizard-bgb.spec.ts.

Regenerate with:

python3 e2e/fixtures/regen_minimal_bgb.py

The generator script is committed alongside so the fixture is reproducible without a AdaptiveLearner backend running.

Reference lesson for the post-answer explanation field (engine schema 1.13, #2991): one theory step, one multiple_choice exercise WITH an authored Markdown explanation (rule, word-by-word gloss, examples, typical mistake), one WITHOUT. Hand-written, Spanish A1 for German speakers. Served through a page.route-mocked content repo by dexie/exercise-explanation.spec.ts and the feature screenshot exercise-explanation/falsche-antwort.

Reference lesson for a matching tile whose word is wider than the tile (#3174): the "Sprachebenen zuordnen" pairs of alc-psychology lesson 32 (sets/de/psych-intro/lessons/32-kognition-vertieft.json), the content the bug was reported from. The right tile "kleinste bedeutungsunterscheidende Lauteinheit" carries a 25-character word that overflows a 375px tile unless it hyphenates or wraps. One theory step, one matching exercise, domain psychology (German on both sides). Served through a page.route-mocked content repo by the feature screenshots matching-animation/matching-long-word and matching-animation/matching-long-word-resolved.

Reference lesson for the ordering review after a wrong answer (#3260): the "Der Ablauf eines Absendens" step of alc-programming React 19 lesson 01 (sets/de/react-19/lessons/01-actions-useactionstate.json), one ext:al-ordering exercise with five steps, declared in the lesson's own requires_extensions (the root and set manifests carry none, as in the real repo). One theory step, one ordering exercise, domain programming (German on both sides). The bundled set has no ordering exercise. Served through a page.route-mocked content repo by the feature screenshot ordering-review/falsche-reihenfolge, which places the first two steps swapped and checks in practice mode.

Reference lesson for content from another server (#3803): one theory step with a Markdown image from example.com, one multiple_choice exercise, and resources with a YouTube video and an article. The app loads none of it: the image renders as a link, the video card shows a local placeholder. Hand-written, German knowledge content. Served through a page.route-mocked content repo by the feature screenshots content-privacy/bild-als-link and content-privacy/video-karte.

The control lesson of the evaluation pilot, byte-identical to sets/de/evaluation-pilot-control/lessons/01-hauptstadt-quiz-kontrolle.json in adaptive-learner-content-test: ten capitals, six multiple_choice and four select clozes. e7 (Sweden) and e8 (Norway) carry each other's answer as a distractor, the case of #3752. Served through a page.route-mocked content repo by webkit/select-cloze-tap.spec.ts.