Code Review: PR #607

Commit: a728befe09ac631ef9909ff82a5d4955b5055543

Verdict is APPROVED. Posted as a comment because GitHub blocks self-approval on a single-account setup — the Rex approval marker has been written for the merge gate.

Summary

Adds a "Skip level" (forfeit-to-0) feature to the public site/game.html. A SKIP button is grouped with HINT in a new .footer-btns flex container; a skipLevel() function implements a tap-to-confirm guard (arm + warn on first tap, skip on second tap within 4s); SKIP is shown/hidden at the correct flow points. +33/-1, single file.

Checklist Results

• Architecture & Design: Pass — single self-contained static page; reuses the existing advance() transition function rather than adding a parallel flow.
• Code Quality: Pass — small focused function, clear comments, defensive == null guard before writing the 0 score.
• Testing: N/A — static site, no test suite. node --check on the extracted inline script passes clean (verified independently).
• Security: Pass — no user input, no injection surface, no secrets. Pure client-side DOM.
• Performance: Pass — one CSS rule, one button, one function. No hot-path impact.
• PR Description & Glossary: Pass — Summary + Testing + Glossary all present; Closes #606 (OPEN); narrative bullets.
• Summary Bullet Narrative: Pass — bullets state what changed AND why (e.g. tap-to-confirm "prevents accidentally zeroing a level").
• Technical Decisions (AgDR):N/A — UI feature, no library/framework/architecture decision introduced.
• Adopter Handbooks: N/A — no architecture/general handbook rules apply to a single static HTML file; no language handbook matches .html.

Verification performed

• Syntax: extracted the single inline <script> block and ran node --check → clean. LEVELS array still has 11 render entries.
• Skip flow correctness: skipLevel() early-returns unless state.phase === 'play' AND no .result-bar is present in the stage. After a normal submit, state.phase stays 'play' until Continue is clicked — so the .result-bar check is the load-bearing guard that prevents skip-after-submit (belt-and-suspenders with the button being hidden in showResult). Both guards confirmed necessary and correct.
• Last-level routing: skip calls advance() while phase === 'play', hitting the else branch → state.level++; when state.level >= LEVELS.length it routes to renderOutro() and returns. No crash, no out-of-bounds LEVELS[state.level] access. Verified.
• Scope: skipBtn, skipArmed, state, advance are all module-level; skipLevel is a hoisted function declaration, so the skipBtn.onclick = () => skipLevel() wiring above its definition is fine.
• Score model: skip records 0 into state.levelScores[state.level] (per-level breakdown) guarded by == null, and does NOT touch state.score (running total) — total is correctly unchanged and the outro tally shows 0/100 for the skipped level. Verified against all state.score / levelScores mutation sites.
• No double-fire / bad state: SKIP is hidden in renderSlide, renderIntro, renderOutro, and showResult; re-shown only in advance()'s slide→play branch. skipArmed resets on the 4s timeout and on entering each play phase.
• HINT regression: HINT keeps its own id="hintBtn" and its per-level onclick handlers; SKIP shares only the .hint-btn styling class. No duplicate IDs. No regression.
• Footer layout: .footer-btns wraps both buttons in a flex group; the footnote <span> remains a sibling. Pure cosmetic grouping.

Issues Found

None blocking.

Suggestions

• nit (non-blocking): benign self-healing race in the 4s arm timeout — if SKIP is armed and the player then transitions to a different level within that window, the stale timeout's disarm could clear a freshly-armed state on the next level, costing at most one extra tap. It cannot leave the game in a bad state (advance() resets skipArmed on each play phase). Optional hardening: capture the round in a closure and no-op the timeout if it changed. Not required for ship.

Verdict

APPROVED

🤖 Reviewed by Rex (Code Reviewer Agent)
📌 Reviewed commit: a728befe09ac631ef9909ff82a5d4955b5055543