The U.S. Web Design System helps the federal government build fast, accessible, mobile-friendly websites.
This report summarizes scanner evidence for uswds/uswds, a JavaScript project with 7,237 GitHub stars. SynthScan examined 95,328 lines of code across 1245 source files, recording 115 pattern matches distributed across 9 syntactic categories. The legacy adjusted pattern signal is 1.9 (Low pattern signal); it is not an authorship estimate.
Use the findings to ask whether maintainers can explain intent, verify dependencies, simplify unnecessary scaffolding, and focus review effort. Risk Payload v1 adds ownership, supply-chain, over-engineering, and review-effort vectors when available. These are prompts for human verification, not probabilities, security findings, or measured maintenance costs.
Use each vector to guide manual verification of the underlying findings.
Payload schema: 1.0.0 · Engine: 2.0.0 · Scoring: heuristic-density-v1 · Scan date: 2026-10-31.
Can maintainers explain intent, assumptions, and trade-offs? 31 finding(s).
Are imports declared and package/API names verified? 67 finding(s).
Are wrappers, guards, and repeated structures necessary? 18 finding(s).
Which changes need focused human review? 115 finding(s).
This chart tracks the legacy adjusted pattern score across scan runs. Changes can reflect source changes, scan coverage, or detector/scoring versions; they do not measure AI adoption or prove that a team refactored code. Compare runs only when their scoring versions are compatible. The dashed line tracks the raw pattern-hit count.
Groups findings by configured severity weight. Severity is not a confidence estimate, security rating, or proof that a package is missing. Verify imports against the project's manifests and inspect each finding in its local design context.
This horizontal bar chart shows where configured pattern scores accumulate across directories. Treat the bars as locations to inspect, not as evidence of authorship or code quality. Use the file-level findings to decide whether a directory needs a focused ownership, dependency, complexity, or review check.
The scanner identified 115 distinct pattern matches across 9 syntactic categories. Each entry below represents a discrete location in the source code where the engine recorded a detector match to inspect in context. Expand any category row to inspect the individual file paths, line numbers, code snippets, and the lexical context (CODE, COMMENT, or STRING) in which each match was detected.
Reading the findings table: The Severity column indicates the configured finding weight (CRITICAL / HIGH / MEDIUM / LOW). The Context column identifies whether the match occurred inside executable code, an inline comment, or a string literal — legacy comment-context matches receive a ×1.5 score weight. The ⚡ bolt icon marks clustered matches: three or more patterns within a 10-line window, each receiving an additional ×1.5 density multiplier under the legacy scoring model.
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | packages/usa-section/src/content/usa-section~dark.json | 4 | "text": "Lorem ipsum dolor sit amet, <a class=\"usa-link\" href=\"javascript:void(0);\">consectetur adipiscing</a> eli | CODE |
| LOW | packages/usa-section/src/content/usa-section~dark.json | 4 | "text": "Lorem ipsum dolor sit amet, <a class=\"usa-link\" href=\"javascript:void(0);\">consectetur adipiscing</a> eli | CODE |
| LOW | packages/usa-section/src/content/usa-section~light.json | 4 | "text": "Lorem ipsum dolor sit amet, <a class=\"usa-link\" href=\"javascript:void(0);\">consectetur adipiscing</a> eli | CODE |
| LOW | packages/usa-section/src/content/usa-section~light.json | 4 | "text": "Lorem ipsum dolor sit amet, <a class=\"usa-link\" href=\"javascript:void(0);\">consectetur adipiscing</a> eli | CODE |
| LOW | packages/usa-section/src/content/usa-section.json | 4 | "text": "Lorem ipsum dolor sit amet, <a class=\"usa-link\" href=\"javascript:void(0);\">consectetur adipiscing</a> eli | CODE |
| LOW | packages/usa-section/src/content/usa-section.json | 4 | "text": "Lorem ipsum dolor sit amet, <a class=\"usa-link\" href=\"javascript:void(0);\">consectetur adipiscing</a> eli | CODE |
| LOW | packages/usa-input-mask/src/index.js | 9 | const PLACEHOLDER = "placeholder"; | CODE |
| LOW | …nput-mask/src/content/usa-input-mask-alphanumeric.json | 7 | "placeholder": "___ ___", | CODE |
| LOW | …s/usa-input-mask/src/content/usa-input-mask-phone.json | 7 | "placeholder": "___-___-____", | CODE |
| LOW | …ges/usa-input-mask/src/content/usa-input-mask-zip.json | 7 | "placeholder": "_____-____", | CODE |
| LOW | …ges/usa-input-mask/src/content/usa-input-mask-ssn.json | 7 | "placeholder": "___ __ ____", | CODE |
| LOW | packages/usa-card/src/content/usa-card~media.json | 15 | "content": "Lorem ipsum dolor sit amet consectetur adipisicing elit.\nFacilis earum tenetur quo cupiditate, eaque | CODE |
| LOW | packages/usa-card/src/content/usa-card~media.json | 15 | "content": "Lorem ipsum dolor sit amet consectetur adipisicing elit.\nFacilis earum tenetur quo cupiditate, eaque | CODE |
| LOW | packages/usa-card/src/content/usa-card~media.json | 39 | "content": "Lorem ipsum dolor sit amet consectetur adipisicing elit. Tempore possimus similique nemo odit doloremq | CODE |
| LOW | packages/usa-card/src/content/usa-card~media.json | 39 | "content": "Lorem ipsum dolor sit amet consectetur adipisicing elit. Tempore possimus similique nemo odit doloremq | CODE |
| LOW | packages/usa-card/src/content/usa-card~media.json | 51 | "content": "Lorem ipsum dolor sit amet consectetur adipisicing elit. Tempore possimus similique nemo odit doloremq | CODE |
| LOW | packages/usa-card/src/content/usa-card~media.json | 51 | "content": "Lorem ipsum dolor sit amet consectetur adipisicing elit. Tempore possimus similique nemo odit doloremq | CODE |
| LOW | packages/usa-card/src/content/usa-card~flag.json | 15 | "content": "Lorem ipsum dolor sit amet consectetur adipisicing elit." | CODE |
| LOW | packages/usa-card/src/content/usa-card~flag.json | 15 | "content": "Lorem ipsum dolor sit amet consectetur adipisicing elit." | CODE |
| LOW | packages/usa-card/src/content/usa-card~flag.json | 27 | "content": "Lorem ipsum dolor sit amet consectetur adipisicing elit." | CODE |
| LOW | packages/usa-card/src/content/usa-card~flag.json | 27 | "content": "Lorem ipsum dolor sit amet consectetur adipisicing elit." | CODE |
| LOW | packages/usa-card/src/content/usa-card.json | 11 | "content": "Lorem ipsum dolor sit amet consectetur adipisicing elit.\nFacilis earum tenetur quo cupiditate, eaque | CODE |
| LOW | packages/usa-card/src/content/usa-card.json | 11 | "content": "Lorem ipsum dolor sit amet consectetur adipisicing elit.\nFacilis earum tenetur quo cupiditate, eaque | CODE |
| LOW | packages/usa-card/src/content/usa-card~standard.json | 10 | "content": "Lorem ipsum dolor sit amet consectetur adipisicing elit.\nFacilis earum tenetur quo cupiditate, eaque | CODE |
| LOW | packages/usa-card/src/content/usa-card~standard.json | 10 | "content": "Lorem ipsum dolor sit amet consectetur adipisicing elit.\nFacilis earum tenetur quo cupiditate, eaque | CODE |
| LOW | packages/usa-card/src/content/usa-card~standard.json | 22 | "content": "Lorem ipsum dolor sit amet consectetur adipisicing elit.\nFacilis earum tenetur quo cupiditate, eaque | CODE |
| LOW | packages/usa-card/src/content/usa-card~standard.json | 22 | "content": "Lorem ipsum dolor sit amet consectetur adipisicing elit.\nFacilis earum tenetur quo cupiditate, eaque | CODE |
| LOW | packages/usa-card/src/content/usa-card~standard.json | 34 | "content": "Lorem ipsum dolor sit amet consectetur adipisicing elit. Tempore possimus similique nemo odit doloremq | CODE |
| LOW | packages/usa-card/src/content/usa-card~standard.json | 34 | "content": "Lorem ipsum dolor sit amet consectetur adipisicing elit. Tempore possimus similique nemo odit doloremq | CODE |
| LOW | packages/usa-card/src/content/usa-card~standard.json | 58 | "content": "Lorem ipsum dolor sit amet consectetur adipisicing elit. Tempore possimus similique nemo odit doloremq | CODE |
| LOW | packages/usa-card/src/content/usa-card~standard.json | 58 | "content": "Lorem ipsum dolor sit amet consectetur adipisicing elit. Tempore possimus similique nemo odit doloremq | CODE |
| LOW | packages/usa-alert/src/content/usa-alert~warning.json | 4 | "text": "Lorem ipsum dolor sit amet, <a class=\"usa-link\" href=\"javascript:void(0);\">consectetur adipiscing</a> eli | CODE |
| LOW | packages/usa-alert/src/content/usa-alert~warning.json | 4 | "text": "Lorem ipsum dolor sit amet, <a class=\"usa-link\" href=\"javascript:void(0);\">consectetur adipiscing</a> eli | CODE |
| LOW | packages/usa-alert/src/content/usa-alert~slim.json | 3 | "text": "Lorem ipsum dolor sit amet, <a class=\"usa-link\" href=\"javascript:void(0);\">consectetur adipiscing</a> eli | CODE |
| LOW | packages/usa-alert/src/content/usa-alert~slim.json | 3 | "text": "Lorem ipsum dolor sit amet, <a class=\"usa-link\" href=\"javascript:void(0);\">consectetur adipiscing</a> eli | CODE |
| LOW | packages/usa-alert/src/content/usa-alert~emergency.json | 5 | "text": "Lorem ipsum dolor sit amet, <a class=\"usa-link\" href=\"javascript:void(0);\">consectetur adipiscing</a> eli | CODE |
| LOW | packages/usa-alert/src/content/usa-alert~emergency.json | 5 | "text": "Lorem ipsum dolor sit amet, <a class=\"usa-link\" href=\"javascript:void(0);\">consectetur adipiscing</a> eli | CODE |
| LOW | packages/usa-alert/src/content/usa-alert~error.json | 5 | "text": "Lorem ipsum dolor sit amet, <a class=\"usa-link\" href=\"javascript:void(0);\">consectetur adipiscing</a> eli | CODE |
| LOW | packages/usa-alert/src/content/usa-alert~error.json | 5 | "text": "Lorem ipsum dolor sit amet, <a class=\"usa-link\" href=\"javascript:void(0);\">consectetur adipiscing</a> eli | CODE |
| LOW | packages/usa-alert/src/content/usa-alert.json | 5 | "text": "Lorem ipsum dolor sit amet, <a class=\"usa-link\" href=\"javascript:void(0);\">consectetur adipiscing</a> eli | CODE |
| LOW | packages/usa-alert/src/content/usa-alert.json | 5 | "text": "Lorem ipsum dolor sit amet, <a class=\"usa-link\" href=\"javascript:void(0);\">consectetur adipiscing</a> eli | CODE |
| LOW | packages/usa-alert/src/content/usa-alert~no-header.json | 3 | "text": "Lorem ipsum dolor sit amet, <a class=\"usa-link\" href=\"javascript:void(0);\">consectetur adipiscing</a> eli | CODE |
| LOW | packages/usa-alert/src/content/usa-alert~no-header.json | 3 | "text": "Lorem ipsum dolor sit amet, <a class=\"usa-link\" href=\"javascript:void(0);\">consectetur adipiscing</a> eli | CODE |
| LOW | packages/usa-alert/src/content/usa-alert~no-icon.json | 3 | "text": "Lorem ipsum dolor sit amet, <a class=\"usa-link\" href=\"javascript:void(0);\">consectetur adipiscing</a> eli | CODE |
| LOW | packages/usa-alert/src/content/usa-alert~no-icon.json | 3 | "text": "Lorem ipsum dolor sit amet, <a class=\"usa-link\" href=\"javascript:void(0);\">consectetur adipiscing</a> eli | CODE |
| LOW | packages/usa-alert/src/content/usa-alert~success.json | 4 | "text": "Lorem ipsum dolor sit amet, <a class=\"usa-link\" href=\"javascript:void(0);\">consectetur adipiscing</a> eli | CODE |
| LOW | packages/usa-alert/src/content/usa-alert~success.json | 4 | "text": "Lorem ipsum dolor sit amet, <a class=\"usa-link\" href=\"javascript:void(0);\">consectetur adipiscing</a> eli | CODE |
| LOW | packages/usa-alert/src/content/usa-alert~info.json | 4 | "text": "Lorem ipsum dolor sit amet, <a class=\"usa-link\" href=\"javascript:void(0);\">consectetur adipiscing</a> eli | CODE |
| LOW | packages/usa-alert/src/content/usa-alert~info.json | 4 | "text": "Lorem ipsum dolor sit amet, <a class=\"usa-link\" href=\"javascript:void(0);\">consectetur adipiscing</a> eli | CODE |
| LOW⚡ | …usa-in-page-navigation/src/usa-in-page-navigation.json | 8 | "section_heading": "Lorem ipsum dolor", | CODE |
| LOW⚡ | …usa-in-page-navigation/src/usa-in-page-navigation.json | 9 | "content": "<p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Morbi commodo, ipsum sed pharetra gravida | CODE |
| LOW⚡ | …usa-in-page-navigation/src/usa-in-page-navigation.json | 9 | "content": "<p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Morbi commodo, ipsum sed pharetra gravida | CODE |
| LOW⚡ | …usa-in-page-navigation/src/usa-in-page-navigation.json | 14 | "content": "<p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Morbi commodo, ipsum sed pharetra gravida | CODE |
| LOW⚡ | …usa-in-page-navigation/src/usa-in-page-navigation.json | 14 | "content": "<p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Morbi commodo, ipsum sed pharetra gravida | CODE |
| LOW⚡ | …usa-in-page-navigation/src/usa-in-page-navigation.json | 20 | "content": "<p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Morbi commodo, ipsum sed pharetra gravida | CODE |
| LOW⚡ | …usa-in-page-navigation/src/usa-in-page-navigation.json | 20 | "content": "<p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Morbi commodo, ipsum sed pharetra gravida | CODE |
| LOW⚡ | …usa-in-page-navigation/src/usa-in-page-navigation.json | 26 | "content": "<p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Morbi commodo, ipsum sed pharetra gravida | CODE |
| LOW⚡ | …usa-in-page-navigation/src/usa-in-page-navigation.json | 26 | "content": "<p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Morbi commodo, ipsum sed pharetra gravida | CODE |
| LOW⚡ | …usa-in-page-navigation/src/usa-in-page-navigation.json | 32 | "content": "<p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Morbi commodo, ipsum sed pharetra gravida | CODE |
| LOW⚡ | …usa-in-page-navigation/src/usa-in-page-navigation.json | 32 | "content": "<p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Morbi commodo, ipsum sed pharetra gravida | CODE |
| 7 more matches not shown… | ||||
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| MEDIUM | packages/uswds-core/src/test/package-exports.spec.js | 75 | // ── 1. Per-component subpath resolution ──────────────────────────────────── | COMMENT |
| MEDIUM | packages/uswds-core/src/test/package-exports.spec.js | 114 | // ── 2. Cross-component API surfaces ──────────────────────────────────────── | COMMENT |
| MEDIUM | packages/uswds-core/src/test/package-exports.spec.js | 154 | // ── 3. Barrel exports ────────────────────────────────────────────────────── | COMMENT |
| MEDIUM | packages/uswds-core/src/test/dist-bundle.spec.js | 158 | // ── window.uswdsPresent ───────────────────────────────────────────────────── | COMMENT |
| MEDIUM | packages/uswds-core/src/test/dist-bundle.spec.js | 172 | // ── Component barrel ──────────────────────────────────────────────────────── | COMMENT |
| MEDIUM | packages/uswds-core/src/test/dist-bundle.spec.js | 183 | // ── Component behavior interface ──────────────────────────────────────────── | COMMENT |
| MEDIUM | packages/uswds-core/src/test/dist-bundle.spec.js | 214 | // ── No global leaks ───────────────────────────────────────────────────────── | COMMENT |
| MEDIUM | packages/uswds-core/src/test/dist-bundle.spec.js | 245 | // ── End-to-end accordion interaction ──────────────────────────────────────── | COMMENT |
| MEDIUM | packages/uswds-core/src/test/dist-bundle.spec.js | 293 | // ── Sourcemap sanity ──────────────────────────────────────────────────────── | COMMENT |
| MEDIUM | packages/uswds-core/src/test/dist-bundle.spec.js | 317 | // ── uswds-init.js ES5 compliance ──────────────────────────────────────────── | COMMENT |
| MEDIUM | .github/workflows/contributors.yml | 47 | // ── 1. Fetch all non-bot contributors ──────────────────────────── | COMMENT |
| MEDIUM | .github/workflows/contributors.yml | 60 | // ── 2. Sanitisation helpers ────────────────────────────────────── | COMMENT |
| MEDIUM | .github/workflows/contributors.yml | 96 | // ── 3. Resolve display names and render table cells ───────────── | COMMENT |
| MEDIUM | .github/workflows/contributors.yml | 119 | // ── 4. Build the table ─────────────────────────────────────────── | COMMENT |
| MEDIUM | .github/workflows/contributors.yml | 132 | // ── 5. Splice into COMMUNITY.md ────────────────────────────────── | COMMENT |
| MEDIUM | .github/workflows/contributors.yml | 146 | // ── 6. Update contributor count ────────────────────────────────── | COMMENT |
| MEDIUM | .github/workflows/contributors.yml | 153 | // ── 7. Check for a real diff before writing ─────────────────────── | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | .coderabbit.yaml | 1 | # yaml-language-server: $schema=https://coderabbit.ai/integrations/schema.v2.json | COMMENT |
| LOW | .coderabbit.yaml | 221 | auto_review: | COMMENT |
| LOW | .agents/skills/uswds-code-review/references/gates.md | 281 | ## 9. Error handling: guards, fallbacks, teardown symmetry | COMMENT |
| LOW | packages/usa-tooltip/src/styles/_usa-tooltip.scss | 1 | @use "uswds-core" as *; | COMMENT |
| LOW | packages/uswds-core/src/js/events.js | 1 | module.exports = { | COMMENT |
| LOW | packages/uswds-core/src/js/utils/behavior.js | 61 | // Normalize event handlers to an array of arguments to be passed to either `addEventListener` or | COMMENT |
| LOW | packages/uswds-core/src/styles/_defaults.scss | 1 | // XXX This file has been deprecated in favor of _variables.scss, and is no | COMMENT |
| LOW | …/uswds-core/src/styles/mixins/utilities/_disabled.scss | 1 | @use "../../functions/utilities/color" as *; | COMMENT |
| LOW | …swds-core/src/styles/mixins/utilities/_transition.scss | 1 | @use "sass:meta"; | COMMENT |
| LOW | …ds-core/src/styles/mixins/helpers/add-link-styles.scss | 1 | @use "sass:meta"; | COMMENT |
| LOW | …ds-core/src/styles/mixins/helpers/add-link-styles.scss | 21 | /// } | COMMENT |
| LOW | …ds-core/src/styles/functions/general/map-deep-get.scss | 21 | COMMENT | |
| LOW | …wds-core/src/styles/functions/general/map-collect.scss | 21 | } | COMMENT |
| LOW | …ds-core/src/styles/functions/color/advanced-color.scss | 1 | /* | COMMENT |
| LOW | …s-core/src/styles/functions/color/set-theme-color.scss | 61 | // @return false; | COMMENT |
| LOW | …-core/src/styles/functions/color/get-system-color.scss | 41 | $color-family: general.smart-quote($color-family); | COMMENT |
| LOW | …s/uswds-core/src/styles/functions/color/luminance.scss | 41 | @return math.div(math.round($lum * 1000), 1000); | COMMENT |
| LOW | …wds-core/src/styles/functions/color/is-color-dark.scss | 21 | } | COMMENT |
| LOW | …s/uswds-core/src/styles/functions/utilities/color.scss | 81 | // @debug color(#f00); | COMMENT |
| LOW | packages/usa-breadcrumb/src/styles/_usa-breadcrumb.scss | 201 | // Breadcrumb wrap (deprecated) | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| HIGH | …nts/skills/uswds-code-review/references/calibration.md | 27 | - **Builds a test harness before approving** (#6048): "I've created a branch on uswds-sandbox `test-uswds-breakpoints-60 | CODE |
| HIGH | …nts/skills/uswds-code-review/references/calibration.md | 42 | - #6715: *"Looking at the cjs plugin you wrote, I'm going to suggest a follow-up PR once and issue so we can remove the | CODE |
| HIGH | …nts/skills/uswds-code-review/references/calibration.md | 319 | - #6715: *"I'm going to suggest a follow-up PR once and issue so we can remove the UMD-related checks. **I'll create the | CODE |
| HIGH | …nts/skills/uswds-code-review/references/calibration.md | 320 | - #6700: *"it would probably be helpful to add a description to populate the comment body. **I'll create an issue for it | CODE |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | CONTRIBUTING.md | 244 | ### Step 1: Open an issue | COMMENT |
| LOW | CONTRIBUTING.md | 254 | ### Step 2: Open a pull request | COMMENT |
| LOW | CONTRIBUTING.md | 267 | ### Step 3: Link issue to pull request | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| MEDIUM | .coderabbit.yaml | 5 | # This file is the source of truth. Repository YAML outranks both the repository | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| MEDIUM | …nts/skills/uswds-code-review/references/calibration.md | 178 | ### 13. Developer-experience guardrails for consumers | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | .github/actions/build-diff/build-diff.sh | 70 | # Iterate through the list of all unique files found in both directories. | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | tasks/lint.js | 8 | function ignoreStylelintIgnoreWarnings(lintResults) { | CODE |