Game Developer · L0001 · 2026-07-16

Slice game-developer/0001 · Level 0001 (Web Fundamentals) · Apprentice tier · Engine verdict ⚠️ warn · Walked 2026-07-16

🔗 Perfection run · 🏠 Perfection dashboard · 📄 Raw report · 🕘 Change history

---

🎯 Session Summary

I walked a 5-quest window of the Game Developer → Level 0001 (Web Fundamentals, 🌱 Apprentice) path as a learner would: publish a site (GitHub Pages), build the site engine (Jekyll), configure it (YAML), version it (Git), and template it (Liquid). This is window 1 of 6 over the level’s full 26 quests, so the ledger will sweep the rest across later runs.

Headline verdict: ⚠️ warn. The slice is fundamentally sound — the core technical spine of every quest was executed for real in a sandboxed Jekyll 4.4.1 site and behaved as documented, and the middle of the chain (YAML Configuration scored a perfect 100) is exemplary. But three of five quests carry a single concrete copy-paste bug each that a beginner following the text literally will hit: an unsupported :owner placeholder in a gh api call (GitHub Pages), a broken dev/prod theme-config example that throws a fatal MissingDependencyException (Jekyll), and an invalid-Liquid elsif with a filter in the condition that warns on every build (Liquid). None are structural or unsafe; each is a small, precise fix that a content pass can land. Average 79.2%, 2 pass / 3 warn / 0 fail.

🗺️ The Journey

Walked in plan order (walk-plan.json, dependency-sorted window):

#	Verdict	Quest	Score	One-line takeaway
1	⚠️	GitHub Pages Basics: Host Your Jekyll Site for Free	74	Baseurl/production mechanics verified live; gh api :owner placeholder and a never-renamed master→main branch will trip a literal follower.
2	⚠️	Jekyll Fundamentals: Build Static Sites with Ruby	68	Install→scaffold→serve→collections→build all run clean; the Chapter 4 dev/prod theme example is broken as written (uninstalled gem).
3	✅	YAML Configuration: Site Settings Mastery	100	Flawless — every runnable snippet, including all 5 pitfalls and a real build, executed exactly as described.
4	✅	Git Workflow Mastery: Branches, Merging & Team Collaboration	83	Branch/commit/rebase/conflict all reproduced faithfully; git revert is a named objective but never taught.
5	⚠️	Liquid Templating: Dynamic Content for Jekyll Sites	71	14/15 snippets accurate; the flagship Chapter 2 badge elsif is invalid Liquid (filter inside condition) and warns on every build.

🔬 Evidence

All outcomes below come from the sealed execute-engine evidence (walk-evidence.json / walk-evidence.md) — commands the engine actually ran in a disposable sandbox against a real Jekyll 4.4.1 site. I did not re-run the engine (its child processes cannot authenticate from the agent Bash tool); I read each quest source and cross-checked the findings against the text.

1 · GitHub Pages Basics — ⚠️ 74 · ran 7/7 runnable (1 ✗), 3 reasoned, 4 skipped

• passed — bundle exec jekyll build --baseurl "/my-castle" produced href="/my-castle/assets/main.css" and /my-castle/-prefixed canonical URLs, confirming the Chapter 2 baseurl/relative_url claims.
• passed — bundle exec jekyll serve --baseurl "/my-castle" printed Server address: http://127.0.0.1:4000/my-castle/ (matches the quest text).
• passed — JEKYLL_ENV=production bundle exec jekyll build ran clean, produced _site/.
• passed — git init && git add . && git commit -m "Initial site" ran standalone.
• failed — gh api -X POST repos/:owner/my-castle/pages ... (lines 146-147): gh api --help supports only {owner}/{repo}/{branch} placeholders; the Rails-style :owner is sent literally and the call fails.
• skipped/reasoned — gh repo create ... --push and the gh api Pages-enable call require real GitHub auth + external repo mutation; correctly out of sandbox scope (so the quest’s most consequential steps are unverifiable by any QA pass).

2 · Jekyll Fundamentals — ⚠️ 68 · ran 13/10 runnable (1 ✗), 3 reasoned, 5 skipped

• passed — full Linux path end-to-end: gem install jekyll bundler (jekyll 4.4.1, bundler 4.0.16) → jekyll new my-castle → bundle exec jekyll serve.
• passed — Chapter 3 collections walkthrough verbatim: collections: recipes in _config.yml + _recipes/bread.md rendered at the documented permalink.
• passed — bundle exec jekyll serve --livereload --drafts and JEKYLL_ENV=production bundle exec jekyll build both ran clean.
• failed — Chapter 4 dev/prod config: theme: "jekyll-theme-zer0" in _config_dev.yml merged via --config _config.yml,_config_dev.yml throws MissingDependencyException — the theme gem is never installed.
• reasoned — echo "_site/" >> .gitignore runs but is redundant; jekyll new already seeds .gitignore. docker-compose up -d has no accompanying compose file.

3 · YAML Configuration — ✅ 100 · ran 14/7 runnable, 0 failed, 2 skipped

• passed — core shapes, about.md front matter, and the practical _config.yml all parsed exactly as claimed; _config.yml fed to a real jekyll build (4.4.1) built with no errors.
• passed — _data/team.yml + Liquid loop rendered <p>Ada Lovelace - Architect</p> and <p>Grace Hopper - Compiler Smith</p> exactly.
• passed — all 5 pitfalls reproduced bit-for-bit: yes→True, on→True, 1.20→1.2, 01234→668 (octal), and the colon-in-value quoting case.
• passed — _config_dev.yml layering order, strict_front_matter: true fail-fast, yamllint, and the cytopia/yamllint Docker lint all verified.
• skipped — brew install yamllint / apt install yamllint (no Homebrew, no sudo/apt in sandbox); standard, well-known commands — reasoned, not run.

4 · Git Workflow Mastery — ✅ 83 · ran 7/10 runnable, 3 reasoned, 4 skipped

• passed — git switch -c, add, commit, push -u, status, log --oneline --graph --all, diff, merge, fetch, rebase, rebase --continue, merge --abort, restore, reflog all ran as documented against a bare origin.
• passed — rebase rewrote the feature commit hash (c348d05 → b9865cd), confirming the “rewrites history” claim; conflict scenario produced the exact <<<<<<< / ======= / >>>>>>> markers the quest shows.
• reasoned — the Chapter 2 git merge example captioned “adds a merge commit” actually fast-forwarded in the sandbox (no divergent main commits) — diagram omits the fast-forward case.
• skipped — gh pr create / gh pr merge --squash --delete-branch need an authenticated remote (gh auth status → not logged in); inherent QA limit.

5 · Liquid Templating — ⚠️ 71 · ran 13/4 runnable (1 ✗), 1 reasoned, 1 skipped

• passed — Chapters 1/3/4 snippets reproduced under Jekyll 4.4.1: {​{ greeting | upcase }​}→HI, the capitalize/replace chain, forloop.index, sort+reversed, _data/navigation.yml loop, parameterized {​% include card.html title=... %​}, layout wrapping, comment, raw.
• passed — all 6 external doc links returned HTTP 200.
• failed — Chapter 2 flagship badge logic {​% elsif post.date > site.time | date: "%s" | minus: 604800 %​} throws Liquid syntax error: Expected end_of_string but found pipe on every build; filters are not allowed inside if/elsif conditions, so the “New” badge date comparison never runs.
• reasoned — the forloop.first/unless comma-suppression example is functionally correct but the inline comment implies a single clean line that a learner won’t see without whitespace-control dashes.

Verbatim engine roll-up: 5 quests · ✅ 2 pass · ⚠️ 3 warn · ❌ 0 fail · avg 79.2% · ~$4.8117 (from walk-evidence.md).

🐞 Issues Found

Concrete, evidenced problems only. Every item cites a command result from the sealed sandbox run or an exact line in the quest source. These are for a content pass / human — this session makes no content edits.

HIGH

• high · Jekyll Fundamentals · Chapter 4 “One Repo, Two Configs” · observed: merging _config_dev.yml (which sets theme: "jekyll-theme-zer0") via --config _config.yml,_config_dev.yml throws a fatal MissingDependencyException because the theme gem is never installed. · fix: add the install/Gemfile step (gem install jekyll-theme-zer0 + jekyll-remote-theme) before the example, or swap to an already-installed theme (e.g. minima) so the merged config runs.
• high · Liquid Templating · Chapter 2 “Looping and Branching” · {​% elsif post.date > site.time | date: "%s" | minus: 604800 %​} · observed: invalid Liquid (filter inside condition) → syntax-error warning on every build, badge logic never evaluates. · fix: precompute with {​% assign week_ago = ... %​} before the loop and coerce both sides to the same numeric type, then compare {​% elsif post_ts > week_ago %​} (engine confirmed the corrected pattern builds clean).
• high · GitHub Pages Basics · Chapter 1 gh api Pages-enable (lines 146-147) · repos/:owner/my-castle/pages · observed: gh api supports only {owner} placeholders; :owner is sent literally and the call fails. · fix: use repos/{owner}/my-castle/pages or tell readers to substitute their real username.

MEDIUM

• medium · GitHub Pages Basics · macOS/Windows/Linux quick-start paths (lines ~150-105) · observed: only the Cloud Realms path runs git branch -M main; a fresh git init in the sandbox (git 2.54, no init.defaultBranch) creates master, which collides with the hardcoded main in the gh api call and the Settings → Pages instructions. · fix: add git branch -M main to every OS path.
• medium · GitHub Pages Basics · Secondary objective “GitHub Actions Build” (line 24/114) · observed: listed as an objective but never taught in the body — no workflow YAML, only an external link. · fix: add a minimal Actions-Pages workflow example or downgrade the objective.
• medium · Git Workflow Mastery · Secondary objective “Undo Safely” · observed: git revert is a named learning objective but is never explained, demonstrated, or mentioned again anywhere in the body (unlike restore/reflog, which at least get a warning-callout mention). · fix: add a short worked git revert example.
• medium · Jekyll Fundamentals · Chapter 4 · observed: a docker-compose up -d line with no accompanying docker-compose.yml — nothing for the learner to run. · fix: include a minimal compose file or remove the line.
• medium · Liquid Templating · Chapter 4 forloop.first/unless comma example · observed: claimed “Output: liquid, jekyll, templating” single line is not what renders without whitespace-control dashes. · fix: add the - dashes or correct the inline comment.

LOW

• low · Jekyll Fundamentals · Chapter 2 anatomy diagram · lists index.md but jekyll new scaffolds index.markdown; also implies _layouts//_includes//_data/ exist in a fresh scaffold when they are theme-supplied. · fix: correct the names and clarify they come from the theme gem.
• low · Jekyll Fundamentals · webrick troubleshooting entry is stale — Jekyll 4.3+ lists webrick as a gemspec dependency, so the error is now rare. · fix: reframe as an older-Jekyll caveat.
• low · Git Workflow Mastery · merge diagram implies git merge always creates a merge commit, omitting the common fast-forward case (which is what actually happened in the sandbox). · fix: note the fast-forward case.
• low · GitHub Pages Basics · Pre-Launch Checklist “robots.txt and sitemap.xml generated” (line 309) — a bare jekyll new site generates neither without jekyll-sitemap. · fix: note the plugin requirement. Also mention optional IPv6 AAAA records alongside the four A records.
• low · Liquid Templating · Intermediate Challenge requires an {​% if item.url == page.url %​}active{​% endif %​} current-page comparison never demonstrated in the lesson; case/when and and/or/contains are named in prose but never shown as code. · fix: add short worked examples.

🔗 Chain Continuity

Reasoning about these five quests as one linked journey for a Game Developer apprentice (reasoned from the quest sources + dependency frontmatter; not a separate execution):

• Intra-window ordering inverts a hard prerequisite. The plan presents GitHub Pages Basics first, but its frontmatter required_quests lists /quests/0001/jekyll-fundamentals/ and its body (line 133) assumes “A working Jekyll site from the previous quest.” Jekyll Fundamentals is quest #2 in this window. A learner walking these five strictly top-to-bottom would try to deploy a site they haven’t built yet. This is a window-slice artifact (the window is offset 5 of a 26-quest dependency graph, so intra-window order need not equal learner order), but it is worth flagging: as delivered, the first quest’s stated prerequisite is satisfied only by the second. Confidence: high (frontmatter + body text).
• The Jekyll → YAML → Liquid spine is coherent and well-sequenced. Jekyll Fundamentals establishes install/scaffold/serve/collections; YAML Configuration (which requires Jekyll) deepens _config.yml/_data mastery flawlessly; Liquid Templating (which requires Jekyll, recommends YAML) then consumes exactly the _data/*.yml + front-matter concepts those two taught — the _data/navigation.yml loop in Liquid lands cleanly because YAML already drilled data files. This is the strongest stretch of the chain and reads as a genuine progression.
• Prerequisite reaching outside the window is satisfied elsewhere. Git Workflow Mastery requires /quests/0000/git-basics/ (an earlier level, not in this window) and GitHub Pages recommends it too — appropriate for level 0001 and presumably covered by an earlier window; nothing in this slice re-teaches basic Git, which is correct.
• A curious unlocks edge: Git Workflow Mastery lists unlocks_quests: /quests/0001/jekyll-fundamentals/, yet Jekyll Fundamentals has no required_quests and clearly precedes Git in difficulty (🟢 vs 🟡). Not a blocker, but the unlock direction reads backwards; a maintainer may want to sanity check the registry edges for this level.
• No prerequisite knowledge gap inside the taught content. Where a quest assumes a skill, an earlier quest in the spine actually teaches it (baseurl builds rely on Jekyll build, verified; Liquid data loops rely on YAML data files, verified). The friction points are the three copy-paste bugs above, not missing conceptual scaffolding.

🧠 Reasoning & Method

• Mode: execute (real commands in a disposable sandbox), consumed from the workflow-sealed walk-evidence.json / walk-evidence.md. I did not run the engine myself — its child claude processes cannot authenticate from the agent’s Bash tool — and I did not edit the plan or evidence in any way.
• What was tested vs. reasoned: All passed/failed verdicts above come from commands the engine actually ran (Jekyll 4.4.1 builds/serves, git operations, yamllint, Liquid renders). Items labeled reasoned/skipped were not executed: anything needing real GitHub auth or external mutation (gh repo create, gh api Pages-enable, gh pr create/merge) and package installs needing Homebrew/sudo (brew/apt install yamllint). The chain-continuity ordering finding is reasoned from frontmatter + body text, not a separate run.
• Coverage honesty: This is window 1 of 6 — 5 of the level’s 26 quests. The remaining 21 are out of scope for this session and will be swept by later ledger runs; I did not expand beyond the planned window. Snippet coverage per quest is reported inline in §Evidence (e.g. Liquid ran 13, with 4 counted “runnable” and 1 failing). The single most consequential class of steps in GitHub Pages Basics (the actual deploy) is inherently unverifiable in a sandbox and should be read as untested, not passing.
• Confidence: High on the three HIGH bugs (each reproduced or statically unambiguous and cross-checked against the source lines). High on the coherence of the Jekyll→YAML→Liquid spine. Medium on the ordering call-out (likely a window-slice artifact rather than a curriculum defect). Overall session verdict ⚠️ warn: no failures, no safety issues (safety = 5 across all five), but three warn-level quests each gated by one literal copy-paste bug a beginner will hit.