💌 Build and send emails using React
This report summarizes scanner evidence for resend/react-email, a TypeScript project with 19,901 GitHub stars. SynthScan examined 152,813 lines of code across 1342 source files, recording 106 pattern matches distributed across 4 syntactic categories. The legacy adjusted pattern signal is 0.9 (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? 41 finding(s).
Are imports declared and package/API names verified? 65 finding(s).
Are wrappers, guards, and repeated structures necessary? 35 finding(s).
Which changes need focused human review? 106 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 106 distinct pattern matches across 4 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 | …ipts/utils/default-seed/communications/team-invite.tsx | 74 | inviterName: 'John Doe', | CODE |
| LOW | …c/utils/caniemail/tailwind/get-tailwind-config.spec.ts | 11 | './tests/dummy-email-template.tsx', | CODE |
| LOW | …c/utils/caniemail/tailwind/get-tailwind-config.spec.ts | 30 | './tests/dummy-email-template-inline-config.tsx', | CODE |
| LOW | …c/utils/caniemail/tailwind/get-tailwind-config.spec.ts | 49 | './tests/dummy-email-template-shadowed-config.tsx', | CODE |
| LOW | …c/utils/caniemail/tailwind/get-tailwind-config.spec.ts | 68 | './tests/dummy-email-template-empty-config.tsx', | CODE |
| LOW | …c/utils/caniemail/tailwind/get-tailwind-config.spec.ts | 85 | './tests/dummy-email-template-plugin-import.tsx', | CODE |
| LOW⚡ | …ls/caniemail/tailwind/get-tailwind-css-configs.spec.ts | 41 | const cfg = await cssConfigsFor('dummy-email-template-theme-inline.tsx'); | CODE |
| LOW⚡ | …ls/caniemail/tailwind/get-tailwind-css-configs.spec.ts | 48 | 'dummy-email-template-theme-variable.tsx', | CODE |
| LOW⚡ | …ls/caniemail/tailwind/get-tailwind-css-configs.spec.ts | 55 | const cfg = await cssConfigsFor('dummy-email-template-theme-import.tsx'); | CODE |
| LOW⚡ | …ls/caniemail/tailwind/get-tailwind-css-configs.spec.ts | 64 | 'dummy-email-template-utility-inline.tsx', | CODE |
| LOW⚡ | …ls/caniemail/tailwind/get-tailwind-css-configs.spec.ts | 72 | 'dummy-email-template-utility-variable.tsx', | CODE |
| LOW⚡ | …ls/caniemail/tailwind/get-tailwind-css-configs.spec.ts | 80 | 'dummy-email-template-utility-import.tsx', | CODE |
| LOW⚡ | …ls/caniemail/tailwind/get-tailwind-css-configs.spec.ts | 88 | const cfg = await cssConfigsFor('dummy-email-template.tsx'); | CODE |
| LOW⚡ | …ls/caniemail/tailwind/get-tailwind-css-configs.spec.ts | 93 | const cfg = await cssConfigsFor('dummy-email-template-combined.tsx'); | CODE |
| LOW | …ls/caniemail/tailwind/get-tailwind-css-configs.spec.ts | 105 | const cfg = await cssConfigsFor('dummy-email-template-unresolvable.tsx'); | CODE |
| LOW | …ls/caniemail/tailwind/get-tailwind-css-configs.spec.ts | 117 | 'dummy-email-template-theme-inline.tsx', | CODE |
| LOW | …ls/caniemail/tailwind/get-tailwind-css-configs.spec.ts | 125 | 'dummy-email-template-utility-inline.tsx', | CODE |
| LOW⚡ | …ls/caniemail/tailwind/get-tailwind-css-configs.spec.ts | 137 | 'dummy-email-template-combined.tsx', | CODE |
| LOW⚡ | …ls/caniemail/tailwind/get-tailwind-css-configs.spec.ts | 143 | 'dummy-email-template-combined.tsx', | CODE |
| LOW⚡ | …ls/caniemail/tailwind/get-tailwind-css-configs.spec.ts | 149 | 'dummy-email-template-combined.tsx', | CODE |
| LOW | …l/tailwind/tests/dummy-email-template-theme-import.tsx | 2 | import customTheme from './dummy-email-template-theme-import.css?inline'; | CODE |
| LOW | …tailwind/tests/dummy-email-template-utility-import.tsx | 2 | import customUtility from './dummy-email-template-utility-import.css?inline'; | CODE |
| LOW | …es/react-email/src/components/section/section.spec.tsx | 6 | const actualOutput = await render(<Section>Lorem ipsum</Section>); | CODE |
| LOW | …es/react-email/src/components/section/section.spec.tsx | 8 | `"<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitio | CODE |
| LOW⚡ | …es/react-email/src/components/section/section.spec.tsx | 32 | <div>Lorem ipsum</div> | CODE |
| LOW⚡ | …es/react-email/src/components/section/section.spec.tsx | 41 | <td>Lorem ipsum</td> | CODE |
| LOW⚡ | …es/react-email/src/components/section/section.spec.tsx | 50 | <div>Lorem ipsum</div> | CODE |
| LOW⚡ | …es/react-email/src/components/section/section.spec.tsx | 51 | <p>Lorem ipsum</p> | CODE |
| LOW | …es/react-email/src/components/heading/heading.spec.tsx | 25 | Lorem ipsum | CODE |
| LOW | …es/react-email/src/components/heading/heading.spec.tsx | 29 | `"<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitio | CODE |
| LOW | packages/react-email/src/components/body/body.spec.tsx | 24 | const actualOutput = await render(<Body>Lorem ipsum</Body>); | CODE |
| LOW | packages/react-email/src/components/body/body.spec.tsx | 26 | `"<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitio | CODE |
| LOW | …ages/react-email/src/components/column/column.spec.tsx | 23 | const actualOutput = await render(<Column>Lorem ipsum</Column>); | CODE |
| LOW | …ages/react-email/src/components/column/column.spec.tsx | 25 | `"<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitio | CODE |
| LOW | …es/react-email/src/components/preview/preview.spec.tsx | 42 | 'Lorem ipsum dolor sit amet consectetur adipisicing elit. Tenetur dolore mollitia dignissimos itaque. At excepturi | CODE |
| LOW | …es/react-email/src/components/preview/preview.spec.tsx | 42 | 'Lorem ipsum dolor sit amet consectetur adipisicing elit. Tenetur dolore mollitia dignissimos itaque. At excepturi | CODE |
| LOW | packages/react-email/src/components/text/text.spec.tsx | 30 | const actualOutput = await render(<Text>Lorem ipsum</Text>); | CODE |
| LOW | packages/react-email/src/components/text/text.spec.tsx | 32 | `"<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitio | CODE |
| LOW | packages/render/src/browser/render-web.spec.tsx | 204 | Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do | CODE |
| LOW | packages/render/src/browser/render-web.spec.tsx | 204 | Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do | CODE |
| LOW | packages/render/src/browser/render-web.spec.tsx | 221 | `"<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitio | CODE |
| LOW | packages/render/src/browser/render-web.spec.tsx | 221 | `"<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitio | CODE |
| LOW | packages/render/src/node/render-edge.spec.tsx | 214 | Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do | CODE |
| LOW | packages/render/src/node/render-edge.spec.tsx | 214 | Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do | CODE |
| LOW | packages/render/src/node/render-edge.spec.tsx | 231 | `"<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitio | CODE |
| LOW | packages/render/src/node/render-edge.spec.tsx | 231 | `"<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitio | CODE |
| LOW | packages/render/src/node/render-node.spec.tsx | 167 | Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do | CODE |
| LOW | packages/render/src/node/render-node.spec.tsx | 167 | Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do | CODE |
| LOW | packages/render/src/node/render-node.spec.tsx | 184 | `"<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitio | CODE |
| LOW | packages/render/src/node/render-node.spec.tsx | 184 | `"<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitio | CODE |
| LOW | skills/react-email/SKILL.md | 120 | name: 'John Doe', | CODE |
| LOW | skills/react-email/SKILL.md | 288 | to: ['user@example.com'], | CODE |
| LOW | skills/react-email/references/I18N.md | 150 | to: ['user@example.com'], | CODE |
| LOW | skills/react-email/references/SENDING.md | 40 | to: ['user@example.com'], | CODE |
| LOW | skills/react-email/references/SENDING.md | 69 | to: ['user@example.com'], | CODE |
| LOW | skills/react-email/references/SENDING.md | 95 | to: 'user@example.com', | CODE |
| LOW | skills/react-email/references/SENDING.md | 119 | to: ['user@example.com'], | CODE |
| LOW | skills/react-email/references/SENDING.md | 136 | to: 'user@example.com', | CODE |
| LOW | skills/react-email/references/PATTERNS.md | 75 | email: 'user@example.com', | CODE |
| LOW | skills/react-email/references/PATTERNS.md | 273 | name: 'John Doe', | CODE |
| 3 more matches not shown… | ||||
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | …arks/ui/src/utils/run-server-and-fetch-preview-page.ts | 6 | export function runServerAndFetchPreviewPage(pathToCliScript: string) { | CODE |
| LOW | packages/ui/src/utils/get-email-component.ts | 26 | function describeBundledModuleExports(value: unknown): string { | CODE |
| LOW | …i/src/utils/caniemail/ast/get-used-style-properties.ts | 53 | export function writtenMemberExpressionTo( | CODE |
| LOW | …/react-email/src/components/tailwind/tailwind.spec.tsx | 779 | function renderComplexEmailWithoutHead() { | CODE |
| LOW | …/react-email/src/components/tailwind/tailwind.spec.tsx | 822 | function renderEmailWithHeadOutsideTailwind() { | CODE |
| LOW | …ents/tailwind/utils/css/downlevel-for-email-clients.ts | 194 | function downlevelRangeMediaQueries(styleSheet: StyleSheet): void { | CODE |
| LOW | …s/tailwind/utils/css/strip-empty-tailwind-vars.spec.ts | 111 | function walkDeclarationsInNonInlinableRules( | CODE |
| LOW | …nts/tailwind/utils/css/sanitize-non-inlinable-rules.ts | 21 | export function sanitizeNonInlinableRules(node: CssNode) { | CODE |
| LOW | …components/tailwind/utils/css/sanitize-declarations.ts | 126 | function separteShorthandDeclaration( | CODE |
| LOW | …utils/tailwindcss/clone-element-with-inlined-styles.ts | 10 | export function cloneElementWithInlinedStyles( | CODE |
| LOW | packages/react-email/src/components/button/button.tsx | 14 | function computeFontWidthAndSpaceCount(expectedWidth: number) { | CODE |
| LOW | packages/editor/src/ui/editor-focus-scope.spec.tsx | 17 | function ManuallyForwardedRefChild(_, forwardedRef) { | CODE |
| LOW | packages/editor/src/ui/slash-command/root.spec.tsx | 65 | async function expectArrowKeysToFollowTheRows() { | CODE |
| LOW | packages/editor/src/ui/inspector/document.tsx | 268 | function InspectorDocumentDefaults({ | CODE |
| LOW | …ditor/src/ui/inspector/utils/resolve-theme-defaults.ts | 64 | export function normalizeInlineStyleUnits( | CODE |
| LOW | …s/editor/src/ui/inspector/hooks/use-document-colors.ts | 102 | function extractColorsFromInlineStyle( | CODE |
| LOW | packages/editor/src/ui/bubble-menu/image-default.tsx | 27 | function BubbleMenuImageDefaultInner({ | CODE |
| LOW | packages/editor/src/ui/bubble-menu/button-default.tsx | 24 | function BubbleMenuButtonDefaultInner({ | CODE |
| LOW | packages/editor/src/plugins/image/file-handler.ts | 6 | export function createImageFileHandlerPlugin( | CODE |
| LOW | …ages/editor/src/plugins/email-theming/normalization.ts | 116 | export function inferThemeFromPanelStyles( | CODE |
| LOW | …ages/editor/src/plugins/email-theming/normalization.ts | 141 | export function normalizeThemePanelStyles( | CODE |
| LOW | …kages/editor/src/plugins/email-theming/theme-config.ts | 55 | export function themeStylesToPanelOverrides( | CODE |
| LOW | packages/editor/src/utils/styles.ts | 103 | export function expandShorthandProperties( | CODE |
| LOW | packages/editor/src/utils/styles.ts | 271 | export function ensureBorderStyleFallback( | CODE |
| LOW | packages/editor/src/utils/is-collaboration.ts | 8 | export function hasCollaborationExtension(exts: Extensions): boolean { | CODE |
| LOW | packages/editor/src/extensions/container.spec.tsx | 354 | function createFakeLiveblocksExtension(getContent: (schema: any) => any) { | CODE |
| LOW | packages/editor/src/extensions/global-content.ts | 22 | function findGlobalContentPositions(doc: Editor['state']['doc']) { | CODE |
| LOW | packages/editor/src/extensions/global-content.ts | 34 | function getCachedGlobalContentPosition(doc: Editor['state']['doc']) { | CODE |
| LOW | packages/editor/src/extensions/columns.tsx | 159 | function handleNodeSelectionBackspace( | CODE |
| LOW | packages/editor/src/extensions/columns.tsx | 217 | function handleBackspaceInsideColumn( | CODE |
| LOW | …ditor/src/__tests__/inspector-padding.browser.spec.tsx | 83 | async function waitForPaddingInputWithValue(expected: string) { | CODE |
| LOW | …s/Community/notifications/papermark-year-in-review.tsx | 34 | export default function PapermarkYearInReviewEmail({ | CODE |
| LOW | …src/app/editor/standalone-editor-inspector/example.tsx | 15 | export function StandaloneEditorInspector() { | CODE |
| LOW | apps/web/src/webgl/Billboard.tsx | 19 | function setupCylinderTextureMapping( | CODE |
| LOW | apps/web/src/webgl/getCanvasTexture.js | 34 | function calculateCanvasDimensions( | CODE |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| CRITICAL | packages/ui/src/actions/render-email-by-path.tsx | 338 | const sourceFileAttributeMatches = cause.span.start.file.content.matchAll( | CODE |
| CRITICAL | packages/ui/src/actions/render-email-by-path.tsx | 357 | const attributeMatches = cause.span.start.file.content.matchAll( | CODE |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | examples/scaleway/next/next-env.d.ts | 1 | /// <reference types="next" /> | COMMENT |
| LOW | examples/resend/next-env.d.ts | 1 | /// <reference types="next" /> | COMMENT |
| LOW | packages/ui/src/app/preview/[...slug]/email-frame.tsx | 21 | // - This is a characteristic from Outlook iOS | COMMENT |
| LOW | …t-email/src/components/tailwind/utils/css/constants.ts | 1 | // At-rules whose contents are conditional, so their declarations can't be | COMMENT |
| LOW | packages/editor/src/utils/styles.spec.ts | 341 | COMMENT | |
| LOW | packages/editor/src/extensions/container.tsx | 141 | if (newState.doc.eq(oldState.doc)) { | COMMENT |