js-lint-configlisted

# JS lint config — tier framework `modules/js/references/static-checks.md` is the always-loaded index. This skill is the **detail companion** — load it when you need the full tier design, AST selectors, three-list sync pattern, or progress-measurement grep templates. > SSOT is `eslint.config.js`. This skill maps the design behind it so you > don't have to read 1000+ lines of config to grok the tiers. --- ## Tier model The framework scales from a clean greenfield codebase up to a legacy monolith mid-migration. Each tier expresses a different blast-radius / acceptable-rule trade-off. ### Tier 1 — Strict The cleaned-up source — small leaf files in a frontend subdirectory. - `no-undef: error` — catch undeclared global references. - `no-implicit-globals: error` — no script-top implicit globals (IIFE OK). - `no-restricted-syntax: error` — block bare AJAX (`$.ajax`, `fetch`, `axios`). - `no-restricted-globals: error` — backstop the `MemberExpression` variant (`window.fetch`, `globalThis.fetch`). ### Tier 1A — JSDoc-globals SSOT (if you use one) If the project keeps an ambient typedef SSOT (`js/<root>/jsdoc-globals.js`), that one file must be `no-implicit-globals: off`. The script-top declarations are intentional ambient typedef definitions. ### Tier 1.5 — Core-exempt Legacy monolith entry-point files (often 5–10 hand-curated bundle files at the root of `js/`). These exempt 4 rules — `no-undef`, `no-implicit-globals`, `no-restricted-syntax`, `no-restricted-globals` — be