Software Developer · L0001 · 2026-07-28

Slice developer/0001 · Level 0001 (Web Fundamentals) · Apprentice tier · Engine verdict ⚠️ warn (avg 84.2%) · Walked 2026-07-28

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

🎯 Session Summary

I walked the first window of the Developer path’s Level 0001 (Web Fundamentals, 🌱 Apprentice) slice — 5 linked main quests out of the level’s 26, dependency-sorted (window 1 of 6). The engine ran each quest end-to-end in a disposable sandbox in execute mode; I then read all five sources in plan order and reasoned about the journey as a beginner who is building one Jekyll site named my-castle across the whole tier.

Headline verdict: WARN. The slice is strong overall — engine average 84.2%, with YAML Configuration a standout (97), and every runnable command that could be safely executed behaved as documented in three of the four scored quests. But two things keep this out of a clean pass: Liquid Templating carries a confirmed high-severity bug — an inline filter chain inside an {​% raw %​}{​% elsif %​}{​% endraw %​} condition that throws a real Liquid syntax error when a learner copy-pastes it — and Jekyll Fundamentals, the true root of this level, could not be machine-verified this run (the engine exhausted its turn budget mid-serve). A maintainer should treat the Liquid elsif fix as the actionable priority and re-run Jekyll Fundamentals with a higher turn cap.

🗺️ The Journey

Walked in walk-plan.json order (this is a mid-level window, so the order is the planner’s dependency-sort slice, not a strict beginner’s linear path — see Chain Continuity):

🔬 Evidence

All command outcomes below come from the sealed execute-mode engine run (walk-evidence.json); static-only judgements are labelled reasoned.

1. GitHub Pages Basics — ✅ 86 (ran 9/7 runnable snippets, 9 passed · 0 failed · 4 skipped · 5 reasoned)

• git init && git add . && git commit -m "Initial site" — passed in-sandbox after setting git user.name/email (a stated prerequisite); clean initial commit.
• gh api -X POST repos/:owner/my-castle/pages … — passed the placeholder check: run with a fake token + --verbose, gh resolved :owner from the local origin remote and POSTed to …/repos/testowner/my-castle/pages, returning the expected 401 for the bad token rather than a placeholder error.
• _config.yml url/baseurl + relative_url filter — passed: built a real jekyll new site with --baseurl "/my-castle"; every generated href correctly prefixed with /my-castle/ (e.g. href="/my-castle/assets/css/style.css").
• bundle exec jekyll serve --baseurl "/my-castle" — passed: server reported Server address: http://127.0.0.1:<port>/my-castle/.
• JEKYLL_ENV=production bundle exec jekyll build + the jekyll.environment == "production" guard — passed: guarded content appeared 2× in the production build, 0× in the dev build.
• gh repo create … --push, brew install gh, winget install GitHub.cli — skipped (real GitHub mutation needs auth; no macOS/Windows in the Linux sandbox). Flags verified against gh 2.96.0 --help.
• sudo apt install -y gh — reasoned/passed via apt-cache policy gh: gh 2.45.0 is in Ubuntu 24.04 universe, so it works as written on current Ubuntu (caveat below for older distros).

2. Jekyll Fundamentals — ❓ errored (no verdict)

• The engine terminated with Reached maximum number of turns (40). The transcript shows it looping on nohup bundle exec jekyll serve > /tmp/jekyll_serve.log 2>&1 & then repeated curl … http://127.0.0.1:4000/ attempts — i.e. it got stuck trying to prove a backgrounded live server was reachable (the same “serve can’t daemonize in the sandbox” limitation the YAML quest hit and worked around by building instead). No per-dimension scores, no snippet coverage were produced. I therefore report no passed/failed evidence for this quest and only reasoned about it statically (below and in Chain Continuity).

3. YAML Configuration — ✅ 97 (ran 16/7 runnable snippets, 16 passed · 0 failed · 1 skipped · 1 reasoned)

• Every YAML snippet (core shapes, front matter, _config.yml, _data/team.yml, pitfalls, plugins.yml, _config_dev.yml, strict_front_matter) parsed under both PyYAML and Ruby/Psych (Jekyll’s real engine).
• Built a live Jekyll 4.4.1 site with the quest’s exact _config.yml, about.md front matter, and _data/team.yml; the {​% raw %​}{​% for member in site.data.team %​}{​% endraw %​} loop rendered exactly Ada Lovelace - Architect and Grace Hopper - Compiler Smith (the two active: true members) — passed.
• Pitfalls verified bit-for-bit against Psych — passed: yes/on → boolean true; version: 1.20 → float 1.2 (trailing zero lost); unquoted colon-in-value → mapping values are not allowed here; zip: 01234 → octal 668.
• --config _config.yml,_config_dev.yml layering — passed: resulting site used url: http://localhost:4002 from the dev override.
• strict_front_matter: true — passed: malformed front matter produced only a yellow warning + successful build without the flag, but a hard Psych::SyntaxError (exit 1) with it.
• docker run --rm … cytopia/yamllint _config.yml — passed (image pulled, exit 0, one benign “missing document start” warning).

4. Git Workflow Mastery — ✅ 83 (ran 7/10 runnable snippets, 7 passed · 0 failed · 3 skipped · 2 reasoned)

• Full “Branch Loop” (git switch main; git pull; git switch -c feature/add-about-page; git add; git commit; git push -u origin …) against a local bare origin — passed, including -u tracking setup.
• git rebase main — passed: a commit’s hash changed dd4e261 → 4851901, confirming the “rewrites history” claim.
• Full conflict cycle — passed: real conflict markers matched the quest’s <<<<<<< HEAD / ======= / >>>>>>> text verbatim; git add+git commit, git merge --abort, git rebase --continue, git restore, git reflog all behaved as documented.
• git switch main; git merge feature/add-about-page — passed to run, but contradicted the quest’s diagram: it produced a fast-forward (Updating 98c2092..f541d00, no merge commit), because main never diverges at that point in the walkthrough (issue below).
• gh pr create / gh pr merge --squash --delete-branch — skipped (no GitHub auth); gh pr create returned the expected set GH_TOKEN auth error, confirming syntax is correct but the environment can’t run it.
• brew/winget/apt installs — reasoned (not run to avoid mutating host); winget IDs Git.Git, GitHub.cli are correct.

5. Liquid Templating — ⚠️ 71 (ran 13/4 runnable snippets, 11 passed · 2 failed · 1 skipped · 1 reasoned)

• Scaffolded a real Jekyll 4.4.1 site; bundle exec jekyll serve --livereload started cleanly (LiveReload + Server address printed) — passed.
• Ch1 filters — passed: {​% raw %​}{​{ "the static web" | capitalize | replace: "web", "kingdom" }​}{​% endraw %​} → The static kingdom; {​% raw %​}{​{ page.date | date: "%B %-d, %Y" }​}{​% endraw %​} → June 14, 2026.
• Ch2 loop helpers (forloop.index, sort:"title" + reversed), Ch3 includes/layouts (parameterised card.html, default.html with {​% raw %​}{​{ content }​}{​% endraw %​}), Ch4 comment/raw/dash-whitespace — all passed, rendering exactly as documented.
• FAILED — Ch2 badge {​% raw %​}{​% elsif post.date > site.time | date: "%s" | minus: 604800 %​}{​% endraw %​}: build emitted Liquid syntax error (line 5): Expected end_of_string but found pipe in "post.date > site.time | date: "%s" | minus: 604800". Filters cannot be chained inside a tag’s conditional expression. Pre-assigning the value removed the error.
• FAILED — Ch4 forloop.first separator example: the code (no dash whitespace-control) renders multi-line liquid\n\n , jekyll\n\n , templating, not the single clean line liquid, jekyll, templating shown in its own <!-- Output: --> comment.
• docker run … jekyll/jekyll:4 … — skipped (image pull blocked/unavailable in sandbox).

Verbatim engine tallies: 4 quests evaluated · ✅ 3 pass · ⚠️ 1 warn · ❌ 1 fail · avg 84.2% · ~$4.0523 (the “1 fail” is the Jekyll Fundamentals engine error, not a content-quality failure).

🐞 Issues Found

High

1. high · Liquid Templating · Ch2 “Looping and Branching” (badge elsif, ~line 266) · tested — {​% raw %​}{​% elsif post.date > site.time | date: "%s" | minus: 604800 %​}{​% endraw %​} throws Liquid syntax error … Expected end_of_string but found pipe on build; a learner copy-pasting this exact snippet gets a broken build with no warning in the text. Fix: pre-compute the value, e.g. {​% raw %​}{​% assign week_ago = site.time | date: "%s" | minus: 604800 %​}{​% endraw %​} before the loop, then {​% raw %​}{​% elsif post.date > week_ago %​}{​% endraw %​}.

Medium

1. medium · Liquid Templating · Ch4 forloop.first separator example (~line 397-400) · tested — documented output liquid, jekyll, templating doesn’t match the multi-line, indented output the whitespace-less snippet actually produces. Fix: add dash whitespace-control ({​% raw %​}{​%- … -%​}{​% endraw %​}) so it yields the single line, or correct the <!-- Output: --> comment to the real result.
2. medium · Git Workflow Mastery · Ch2 “Merge vs. rebase” diagram (~line 284-290) · tested — the literal git merge feature/add-about-page sequence fast-forwards (Updating 98c2092..f541d00, no merge commit), contradicting the A---B---------M diagram, because main never diverges at that point in the walkthrough. Fix: add an intervening commit to main before the merge demo, or note that a merge commit only appears when main has diverged (otherwise Git fast-forwards).
3. medium · Git Workflow Mastery · Secondary objective “Undo Safely” (line 112) · reasoned — git revert is listed as a required skill but never appears anywhere in the body (only git restore/git reflog are shown, in the Ch3 callout). Fix: add a short git revert <commit> example, or drop it from the objective.
4. medium · GitHub Pages Basics · Secondary objective “GitHub Actions Build” (line 114) + Pre-Launch Checklist (line 399) · reasoned/tested — (a) the GitHub Actions build path is listed as an achievement but never taught (only a dangling Resources link); (b) the checklist’s “robots.txt and sitemap.xml generated” implies these happen automatically, but Jekyll generates neither by default (sitemap.xml needs jekyll-sitemap, never mentioned here). Fix: add a brief Actions section with one actions/jekyll-build-pages workflow snippet, and either remove the checklist item or note the jekyll-sitemap requirement.

Low

1. low · YAML Configuration · Ch1 / Mastery Indicators (line 120, 245) · reasoned — the mastery indicator asks learners to “explain why YAML uses spaces, never tabs,” but the body only states the rule, never the reason (tab width is undefined across renderers, so the spec forbids tabs for indentation). Fix: add one explanatory sentence.
2. low · GitHub Pages Basics · Cloud Realms path (line 204-210) · reasoned — jumps straight to git push -u origin main assuming an origin remote already exists in a Codespace, without explaining how it got there (every other platform path uses gh repo create). Fix: add a one-line note or a gh repo create step.
3. low · GitHub Pages Basics · Linux install path (line 186-188) · tested — sudo apt install -y gh works on Ubuntu 24.04 (gh 2.45.0 in universe, verified) but fails on older Ubuntu/Debian without first adding GitHub’s own apt repo. Fix: note the caveat for older distros.
4. low · Liquid Templating · Cloud Realms Docker path (line 190-191) · reasoned — a fresh scaffold’s default gems (minima/jekyll-feed) need network/bundle install inside the jekyll/jekyll:4 container the first time. Fix: add a one-line note.

No fabricated issues: every item above cites either a command the engine actually ran (tested) or a specific quoted line I read (reasoned).

🔗 Chain Continuity

Reasoning about the five quests as one learner’s journey building a single my-castle Jekyll site:

• Shared-artifact continuity is genuinely strong. jekyll new my-castle (Jekyll Fundamentals) is the object every other quest picks up: GitHub Pages, YAML, and Liquid all cd my-castle and edit the same _config.yml, _data/, _includes/, and _layouts/. A beginner who finishes Jekyll Fundamentals genuinely has the site each downstream quest assumes.
• Concepts are reinforced, not contradicted, across the chain. baseurl + the relative_url filter appear in both GitHub Pages (Ch2) and Liquid (Ch2 post.url | relative_url); _data/team.yml modelled in YAML (Ch3) is exactly the shape Liquid (Ch2) loops over via site.data; JEKYLL_ENV=production recurs consistently in Jekyll Fundamentals (Ch4), YAML (Ch4), and GitHub Pages (Ch4). This is good spiral pedagogy.
• Windowing artifact, not a defect: this slice is presented root-second. Jekyll Fundamentals has required_quests: [] and is the true prerequisite of the other four (each declares required_quests: /quests/0001/jekyll-fundamentals/), yet the planner’s window places GitHub Pages Basics first and Jekyll Fundamentals second. A learner literally walking this window top-to-bottom would open GitHub Pages — which explicitly requires “a working Jekyll site from the previous quest” — before the quest that creates it. Because this is window 1 of 6 of a dependency-sorted 26-quest level (offset 5), the real curriculum order is fine; I flag it only so the maintainer knows the report’s order isn’t a clean prerequisite path.
• Loose unlocks metadata (low, cross-quest). Git Workflow Mastery declares unlocks_quests: /quests/0001/jekyll-fundamentals/, but Jekyll Fundamentals has no required prerequisites and is the level root — so that “unlock” edge is inconsistent with the actual dependency graph (and Git Workflow itself requires the Level 0000 Git Basics quest, which sits outside this slice). Not blocking, but the unlock graph among these three (GitHub Pages → Git Workflow → Jekyll Fundamentals → GitHub Pages) has a cycle worth a maintainer’s glance when the registry is next regenerated.
• Prerequisite gaps a real beginner would hit are minor and already caveated: GitHub Pages assumes basic git add/commit/push (recommends the out-of-slice Git Basics), and its Cloud path assumes a pre-existing origin (issue 7). Liquid recommends YAML Configuration “for data files,” which the chain does supply. Nothing in the slice silently assumes a skill the tier never teaches.

🧠 Reasoning & Method

• Mode: execute, in the disposable runner sandbox. I consumed the sealed walk-evidence.json / walk-evidence.md as-is — I did not run, regenerate, or hand-edit the engine (its child claude processes can’t authenticate from the Bash tool). Every passed/failed above is an engine-run command; every static judgement is labelled reasoned.
• What I ran vs. reasoned: The engine executed the commands; I independently read all five quest sources in plan order and reasoned about the linked journey (shared artifacts, reinforced concepts, prerequisite/ordering gaps, metadata cycle). I did not re-execute anything.
• Honest coverage limits:
  • Jekyll Fundamentals was not scored — the engine hit its 40-turn ceiling on a backgrounded-serve reachability loop. This is an engine/harness limitation (the sandbox blocks daemonized serve, the same wall the YAML quest sidestepped by building instead), not evidence the quest is defective; I make no pass/fail claim about it and recommend a re-run with a higher --max-turns or a build-based check. So real coverage is 4 of 5 planned quests scored.
  • Slice coverage: 5 of the level’s 26 quests (window 1 of 6). The remaining 21 are out of scope for this run and unaddressed here.
  • Environment-skipped steps (inherent, not defects): all gh … / GitHub-auth actions (no token), all macOS/Windows package paths (Linux sandbox), and the jekyll/jekyll:4 image pull (network-restricted). These are marked skipped in the evidence, not counted as failures.
• Confidence: High for the three scored passes and the two confirmed Liquid failures (all backed by real command output). Medium-low for Jekyll Fundamentals (static reasoning only). Overall slice verdict WARN — driven by the one high-severity Liquid elsif bug plus the unverified root quest; everything else is a taught-vs-listed or documentation-accuracy gap rather than a broken learner command.

One slice, one report. No quest content was modified; fixable bugs are in Issues Found for a content pass to act on.