[user-github-me]

The source-mutation scanner stored DOM bindings in one map for an entire script. A block or function that reused media could replace another scope’s target: a later video source write was attributed to an image, suppressing the lint warning and the browser probe that reconciles render sources. Parameters and unknown local declarations could also inherit an unrelated outer target.

Resolve bindings through their lexical scopes, including block and function declarations, var, parameters, catch bindings, loops, and named classes. Unknown local bindings shadow outer ones, and alias resolution keeps its declaration scope with a cycle guard. Use Acorn’s node types throughout the scanner. This remains a static heuristic; runtime reassignment and control flow are outside its existing contract.

Validation: 1,249 parser tests pass (4 existing skips, 3 existing todos), all 837 lint tests pass, and 44 producer probe-stage tests pass. Eleven parser regressions, three lint cases, and the source-reconciliation regression fail on current main. Parser build, parser/lint/producer typechecks, repository lint, formatting, and test reachability pass. A Chrome 152 probe compares actual DOM src mutations with scanner output in seven scope cases; every target sequence matches.

[jrusso1020]

Confirmed: the single binding map on main sends a video source write to an image when the same name is reused in another scope, which suppresses both the lint warning and the probe-stage reconciliation. Scoped resolution with lazy alias lookup fixes this. The regression tests cover blocks, sibling functions, params, loops, catch and var hoisting, and they fail on main and pass here.

— Rames

[miguel-heygen]

Checked at 3562929. I ran mediaSrcMutation.test.ts (17) and lint's media.test.ts (97): all pass. With mediaSrcMutation.ts put back to the merge base, 11 scope cases fail (block, sibling function, parameter, catch, loop and class scopes), so the tests guard the change.

Verdict: APPROVE
Reasoning: resolves media source writes in their lexical scope at the one parser lint and probe share; tests fail without it; CI green.