Adversarial pass. The full suite was re-run from scratch (not trusting Execute), and the three items Execute had flagged as "implemented but not auto-asserted" were closed with new assertions rather than deferred.
| Suite | Scope | Result |
|---|---|---|
tests/trace_proto.js |
generator vs iteration-1 engine oracle (4 algos × 3 fixtures) | 14/14 |
tests/v2_verify.js (engine) |
inlined refactored engine re-extracted from the HTML | 42/42 |
tests/v2_verify.js (static) |
innerHTML/eval/Function/fetch/XHR/storage/external-URL scan | 8/8 clean |
tests/v2_integration.js |
race mode unchanged (build, paint, race, step, reset, no-path) | 20/20 |
tests/v2_study.js |
study toggle, scaffold, line-by-line PC, grid sync, annotations, full run, no-path-in-study, race-after-study | 26/26 |
tests/v2_verify_extra.js |
gap-closing: panel-click entry, blurb text, cursor rendering | 9/9 |
111 assertions pass.
| # | Criterion | Verdict | Evidence |
|---|---|---|---|
| 1 | Race mode unchanged (regression) | PASS | race integration 20/20, identical outcome (cost 44/36/44/36, visited 319/417/21/261) |
| 2 | Study toggle default OFF; initial view identical to v1 | PASS | study test: study hidden, panels visible, toggle not pressed at load |
| 3 | Enter study; switch via thumbnails or panel click | PASS | thumbnails (study suite) + panel-title click focuses correct algo (gap-closing) |
| 4 | Shared skeleton; active line advances | PASS | active-line sequence init→pop→goal→mark→for→cost→improve→push |
| 5 | Study Step = one line; Play auto-advances | PASS | study suite |
| 6 | Focused grid: node + neighbor cursors; accumulate overlays | PASS | overlays (closed after pop, open after push) +
cur-node/cur-nb rendered, ≤1 node cursor
(gap-closing) |
| 7 | Live narration with values | PASS | narration populated; no-path narration "unreachable" asserted |
| 8 | Divergent annotations per algo; switching updates | PASS | A*→BFS pop-annotation swap asserted |
| 9 | Teaching blurb + comparison table | PASS | table 4 rows + focus-row highlight; blurb text matches focused algo (gap-closing) |
| 10 | No-path in study graceful | PASS | status "no path", narration explains unreachable, no crash |
| 11 | Generator race reproduces iteration-1 results exactly | PASS | oracle equivalence 14/14 + identical race numbers |
| 12 | No innerHTML/eval/fetch/external URLs | PASS | 8/8 static checks clean |
12 / 12 acceptance criteria pass.
innerHTML, eval, new Function,
fetch, XMLHttpRequest, storage, or
external/protocol-relative URLs.createElement/textContent;
annotations/narration are static strings, not user-derived. No injection
path.The engine refactor (full-expansion loop → generator micro-stepper) is behaviour-preserving: the iteration-1 race suite passes unchanged, and the generator matches the iteration-1 engine on every fixture. No regression introduced.
None. All criteria pass; no security findings; no race regression.
Automated checks confirm the functional rendering (correct classes/overlays/cursors applied, correct text content). What remains is purely visual aesthetics — how the study layout, active-line/cursor highlighting, and narration actually look and feel in a browser — which a headless run cannot judge. Recommend a quick human look (as was done for iteration 1).
Iteration 2 complete. R6 (teach each algorithm), R7 (highlight differences), and R8 (toggleable step-by-step pseudocode execution) are delivered and verified, with the iteration-1 race fully preserved.