diff --git a/.changeset/quick-pumas-climb.md b/.changeset/quick-pumas-climb.md
new file mode 100644
index 000000000..ffbabe79d
--- /dev/null
+++ b/.changeset/quick-pumas-climb.md
@@ -0,0 +1,5 @@
+---
+type: Fixed
+pr: 3451
+---
+ui-plan-gate no longer blocks planning on a UI-token match alone: the gate now requires static frontend evidence (a package.json UI-framework dependency or a component-framework file in the tree) before blocking, so a phase section naming a hyphenated repo like dashboard-financeiro no longer trips the gate in a repo with no frontend. The gate result also surfaces matchedToken/matchedLine so operators can see what triggered the flag.
diff --git a/.gitignore b/.gitignore
index 092f554bf..df786ab7d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -136,6 +136,7 @@ build/
 /gsd-core/bin/lib/command-arg-projection.cjs
 /gsd-core/bin/lib/clock.cjs
 /gsd-core/bin/lib/ui-safety-gate.cjs
+/gsd-core/bin/lib/ui-frontend-evidence.cjs
 /gsd-core/bin/lib/review-reviewer-selection.cjs
 /gsd-core/bin/lib/review-lane-descriptor.cjs
 /gsd-core/bin/lib/review-lane-invocation.cjs
diff --git a/docs/INVENTORY-MANIFEST.json b/docs/INVENTORY-MANIFEST.json
index 6cc973dc8..45dbaea76 100644
--- a/docs/INVENTORY-MANIFEST.json
+++ b/docs/INVENTORY-MANIFEST.json
@@ -504,6 +504,7 @@
       "uat-predicate.cjs",
       "uat.cjs",
       "ui-consideration-probe.cjs",
+      "ui-frontend-evidence.cjs",
       "ui-safety-gate.cjs",
       "unusable-input.cjs",
       "update-context.cjs",
diff --git a/docs/INVENTORY.md b/docs/INVENTORY.md
index 81bc3e2bc..703ee2ab7 100644
--- a/docs/INVENTORY.md
+++ b/docs/INVENTORY.md
@@ -606,6 +606,7 @@ Full listing: `gsd-core/bin/lib/*.cjs`.
 | `uat-predicate.cjs` | UAT-passed predicate — markdown-aware evaluation of HUMAN-UAT results; returns pass only when all required checks pass; ignores false-positive contexts (frontmatter, fenced code, blockquotes, HTML comments) |
 | `ui-consideration-probe.cjs` | Spec-completeness UI-consideration probe (compiled from `src/ui-consideration-probe.cts`, gitignored) — the third adapter of the `probe-core` resolution model (ADR-550 Decision 7): element-kind classification, applicable-category relevance filter, consideration proposal, `proposeElements`/`autoResolve` (propose-then-confirm + the `--auto` never-dismiss floor), and the `{explicit, backstop}` validators; delegates merge/rollup/CLI to `probe-core`; exports `classifyElement`, `applicableCategories`, `proposeConsiderations`, `proposeElements`, `autoResolve`, `analyzeCoverage`, `UI_TAXONOMY` (#1867) |
 | `ui-safety-gate.cjs` | Shell-free word-boundary UI token detector (#3706, #3718); reads phase-section text from stdin, exits 0 (UI found) or 1 (no UI); also deployed to `gsd-core/bin/lib/` so the GSD installer ships it to `$RUNTIME_DIR` (#448) |
+| `ui-frontend-evidence.cjs` | Static frontend-evidence detector (compiled from `src/ui-frontend-evidence.cts`, gitignored) — plan-time structural corroboration for `computeUiPlanGate` (#3312): a `package.json` UI-framework dependency or a component-framework file (`*.tsx/*.jsx/*.vue/*.svelte`) in the tree, so a UI-token match on a hyphenated proper noun (e.g. repo `dashboard-financeiro`) cannot block planning in a repo with no frontend; mirrors the post-wave `computeUiSafetyGate` git-diff corroboration |
 | `update-context.cjs` | Pure install-context resolver for `/gsd-update` — runtime/scope/config-dir/version detection (LOCAL/GLOBAL/UNKNOWN) ported from update.md bash; backs `gsd-tools update-context` (#498) |
 | `validate-command-router.cjs` | Thin CJS subcommand router adapter for `gsd-tools validate` |
 | `validate.cjs` | Pure phase variant normalization helpers (`phaseVariants`, `buildRoadmapPhaseVariants`, `buildNotStartedPhaseVariants`) used by `verify.cjs` for W006/W007 checks; no I/O, no async |
diff --git a/eslint.config.mjs b/eslint.config.mjs
index bbf3fdc62..008aea1b8 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -104,6 +104,8 @@ export default tseslint.config(
       'gsd-core/bin/lib/command-arg-projection.cjs',
       'gsd-core/bin/lib/clock.cjs',
       'gsd-core/bin/lib/ui-safety-gate.cjs',
+      // #3312: tsc-generated runtime artifact — lint the src/ui-frontend-evidence.cts source.
+      'gsd-core/bin/lib/ui-frontend-evidence.cjs',
       'gsd-core/bin/lib/review-reviewer-selection.cjs',
       'gsd-core/bin/lib/review-lane-descriptor.cjs',
       'gsd-core/bin/lib/review-lane-invocation.cjs',
diff --git a/src/check-command-router.cts b/src/check-command-router.cts
index 8a339a7be..6fdcde3a5 100644
--- a/src/check-command-router.cts
+++ b/src/check-command-router.cts
@@ -26,6 +26,7 @@ const { extractFrontmatter } = frontmatterMod;
 import { stripFencedCode, collectSections } from './markdown-sectionizer.cjs';
 import { validatePath } from './security.cjs';
 import { checkUiPresence } from './ui-safety-gate.cjs';
+import { hasStaticFrontendEvidence } from './ui-frontend-evidence.cjs';
 // eslint-disable-next-line @typescript-eslint/no-require-imports
 import verifyModule = require('./verify.cjs');
 const { cmdVerifySchemaDrift, cmdVerifyCodebaseDrift } = verifyModule;
@@ -477,8 +478,9 @@ function cmdDecisionCoverageVerify(projectDir: string, args: string[], raw: bool
  * ui-plan-gate: given a phase number, checks whether the phase has frontend
  * indicators and whether a *-UI-SPEC.md already exists in the phase directory.
  *
- * Returns JSON: { frontend: boolean, hasUiSpec: boolean, block: boolean }
- *   block = frontend && !hasUiSpec (gate fires when UI work is detected but no spec exists)
+ * Returns JSON: { frontend, hasFrontendEvidence, hasUiSpec, block, uiSpecPath, matchedToken, matchedLine }
+ *   block = frontend && hasFrontendEvidence && !hasUiSpec (#3312: gate fires when
+ *   UI work is detected AND the repo has static frontend evidence but no spec exists)
  *
  * Invocable as: gsd_run check ui-plan-gate <phase>
  *
@@ -511,16 +513,30 @@ function findUiSpecInDir(phaseDir: string): string {
  *   (b) Runs checkUiPresence (frontend detection) — no reimplementation.
  *   (c) Resolves the phase directory via findPhaseInternal (phase-locator.cjs); checks for *-UI-SPEC.md.
  *
- * Returns: { frontend, hasUiSpec, block, uiSpecPath, phaseLookupFailed }
- *   block = frontend && !hasUiSpec
+ * Returns: { frontend, hasFrontendEvidence, hasUiSpec, block, uiSpecPath, matchedToken, matchedLine, phaseLookupFailed }
+ *   block = frontend && hasFrontendEvidence && !hasUiSpec   (#3312)
  *   phaseLookupFailed = ROADMAP.md present but phase header not found (surfaced for
  *                       onError:halt gates so a missing phase doesn't silently bypass)
+ *
+ * #3312 — structural corroboration: `frontend` is a vocabulary signal only. A
+ * hyphen is a word boundary, so a phase naming the repo `dashboard-financeiro`
+ * matches the token `dashboard` exactly like the real compound `micro-frontend`
+ * (the boundary rule of #3718 is intentional and untouched). The gate therefore
+ * blocks only when the token match is corroborated by static frontend evidence
+ * in the repo tree (hasStaticFrontendEvidence: package.json UI-framework dep or
+ * a component-framework file). This mirrors the sibling post-wave gate
+ * computeUiSafetyGate, which requires `hasUiFiles` (git diff) before blocking.
+ * matchedToken/matchedLine surface what tripped the sniffer so an operator can
+ * judge the flag in one second instead of reaching for --skip-ui.
  */
 function computeUiPlanGate(projectDir: string, phase: string): {
   frontend: boolean;
+  hasFrontendEvidence: boolean;
   hasUiSpec: boolean;
   block: boolean;
   uiSpecPath: string | null;
+  matchedToken: string | null;
+  matchedLine: string | null;
   phaseLookupFailed?: boolean;
 } {
   // (a) Read the phase section text using the same two-pass lookup as roadmap.get-phase.
@@ -549,6 +565,10 @@ function computeUiPlanGate(projectDir: string, phase: string): {
   const presenceResult = checkUiPresence(phaseSection);
   const frontend = presenceResult.hasUI;
 
+  // (b') #3312 — static structural corroboration. Only probed when the sniffer
+  // matched (evidence is irrelevant otherwise); failures degrade to false.
+  const hasFrontendEvidence = frontend ? hasStaticFrontendEvidence(projectDir) : false;
+
   // (c) Resolve phase directory via findPhaseInternal and check for *-UI-SPEC.md
   let phaseDir = '';
   try {
@@ -568,11 +588,23 @@ function computeUiPlanGate(projectDir: string, phase: string): {
   const uiSpecPath = findUiSpecInDir(phaseDir);
   const hasUiSpec = uiSpecPath !== '';
 
-  // block = frontend phase with no UI-SPEC
-  const block = frontend && !hasUiSpec;
+  // block = frontend phase with structural frontend evidence and no UI-SPEC (#3312)
+  const block = frontend && hasFrontendEvidence && !hasUiSpec;
 
-  const result: { frontend: boolean; hasUiSpec: boolean; block: boolean; uiSpecPath: string | null; phaseLookupFailed?: boolean } = {
-    frontend, hasUiSpec, block, uiSpecPath: hasUiSpec ? uiSpecPath : null,
+  const result: {
+    frontend: boolean;
+    hasFrontendEvidence: boolean;
+    hasUiSpec: boolean;
+    block: boolean;
+    uiSpecPath: string | null;
+    matchedToken: string | null;
+    matchedLine: string | null;
+    phaseLookupFailed?: boolean;
+  } = {
+    frontend, hasFrontendEvidence, hasUiSpec, block,
+    uiSpecPath: hasUiSpec ? uiSpecPath : null,
+    matchedToken: presenceResult.matchedToken,
+    matchedLine: presenceResult.matchedLine,
   };
   if (phaseLookupFailed) result.phaseLookupFailed = true;
   return result;
diff --git a/src/ui-frontend-evidence.cts b/src/ui-frontend-evidence.cts
new file mode 100644
index 000000000..693beca7f
--- /dev/null
+++ b/src/ui-frontend-evidence.cts
@@ -0,0 +1,147 @@
+/**
+ * Static frontend-evidence detector — plan-time structural corroboration for the
+ * UI plan gate (#3312).
+ *
+ * `checkUiPresence` (ui-safety-gate.cjs) is a *vocabulary* signal: a hyphen is a
+ * word boundary, so a phase section naming the repo `dashboard-financeiro` matches
+ * the token `dashboard` exactly like the real UI compound `micro-frontend` does.
+ * That boundary rule is intentional (#3718) and must not be weakened — instead,
+ * the plan gate (`computeUiPlanGate` in check-command-router.cjs) corroborates the
+ * token match against the static repo tree before blocking.
+ *
+ * This mirrors what the sibling post-wave gate (`computeUiSafetyGate`) already
+ * does dynamically: it blocks only when `git diff HEAD~1 HEAD` touches UI files.
+ * Plan time has no diff to inspect, so the corroboration here is static:
+ *
+ *   (a) a `package.json` (root) with a known UI-framework dependency — a project
+ *       that ships react/vue/svelte/... in its manifest is a frontend regardless
+ *       of file layout;
+ *   (b) any `*.tsx` / `*.jsx` / `*.vue` / `*.svelte` file in the tree — the
+ *       component-framework subset of `UI_FILE_EXTENSIONS_RE`
+ *       (check-command-router.cjs). The weaker members of that list (css, scss,
+ *       html, ...) are deliberately NOT static evidence: docs sites and
+ *       markdown/bash/config repos routinely carry stray `.html`/`.css`, which
+ *       is precisely the false-positive class #3312 reports.
+ *
+ * All I/O failures degrade to `false` (no evidence) — never throw.
+ */
+
+import fs from 'node:fs';
+import path from 'node:path';
+
+/** Component-framework file extensions — the static-evidence subset of UI_FILE_EXTENSIONS_RE. */
+export const UI_COMPONENT_FILE_RE = /\.(tsx|jsx|vue|svelte)$/i;
+
+/**
+ * UI-framework package.json dependencies (dependencies OR devDependencies).
+ * Component frameworks/renderers only — deliberately excludes meta tooling
+ * (typescript, eslint, ...) that non-frontend Node projects also carry.
+ */
+const UI_FRAMEWORK_DEPS: ReadonlySet<string> = new Set([
+  'react',
+  'react-dom',
+  'vue',
+  'svelte',
+  '@sveltejs/kit',
+  'angular',
+  '@angular/core',
+  'preact',
+  'solid-js',
+  'lit',
+  'lit-element',
+  'ember-source',
+  '@remix-run/react',
+  'react-native',
+  'expo',
+  'next',
+  'nuxt',
+  'gatsby',
+  'astro',
+  '@ionic/react',
+  '@ionic/vue',
+  '@ionic/angular',
+]);
+
+/** Directories never walked — dependencies, VCS data, build output, GSD planning state. */
+const SKIP_DIRS: ReadonlySet<string> = new Set([
+  'node_modules',
+  '.git',
+  '.planning',
+  'dist',
+  'build',
+  'out',
+  '.next',
+  '.nuxt',
+  '.output',
+  'coverage',
+  'vendor',
+  '.cache',
+]);
+
+/** Walk safety cap — beyond this the tree is treated as scanned (evidence decided by then). */
+const MAX_WALK_ENTRIES = 10_000;
+
+function packageJsonHasUiFramework(projectDir: string): boolean {
+  let raw: string;
+  try {
+    raw = fs.readFileSync(path.join(projectDir, 'package.json'), 'utf8');
+  } catch {
+    return false; // no/unreadable package.json → no evidence from this signal
+  }
+  let parsed: unknown;
+  try {
+    parsed = JSON.parse(raw);
+  } catch {
+    return false; // malformed package.json → no evidence from this signal
+  }
+  if (parsed === null || typeof parsed !== 'object') return false;
+  const pkg = parsed as Record<string, unknown>;
+  for (const field of ['dependencies', 'devDependencies', 'peerDependencies'] as const) {
+    const deps = pkg[field];
+    if (deps === null || typeof deps !== 'object') continue;
+    for (const name of Object.keys(deps)) {
+      if (UI_FRAMEWORK_DEPS.has(name)) return true;
+    }
+  }
+  return false;
+}
+
+function treeHasComponentFile(projectDir: string): boolean {
+  // Iterative BFS — bounded by MAX_WALK_ENTRIES so a pathological tree cannot
+  // stall the gate. Symlinks are never followed (withFileTypes + isDirectory).
+  const queue: string[] = [projectDir];
+  let visited = 0;
+  while (queue.length > 0 && visited < MAX_WALK_ENTRIES) {
+    const dir = queue.shift() as string;
+    let entries: fs.Dirent[];
+    try {
+      entries = fs.readdirSync(dir, { withFileTypes: true });
+    } catch {
+      continue; // unreadable directory → skip it
+    }
+    for (const entry of entries) {
+      visited++;
+      if (visited >= MAX_WALK_ENTRIES) return false;
+      if (entry.isDirectory()) {
+        if (!SKIP_DIRS.has(entry.name)) queue.push(path.join(dir, entry.name));
+      } else if (entry.isFile() && UI_COMPONENT_FILE_RE.test(entry.name)) {
+        return true;
+      }
+    }
+  }
+  return false;
+}
+
+/**
+ * Does the project tree carry static evidence of a frontend?
+ *
+ * @param projectDir - Absolute path to the project root (the gate's cwd).
+ * @returns true when package.json declares a UI-framework dependency or the
+ *          tree contains a component-framework file; false otherwise (including
+ *          on any I/O failure — evidence must be affirmative).
+ */
+export function hasStaticFrontendEvidence(projectDir: string): boolean {
+  if (typeof projectDir !== 'string' || projectDir === '') return false;
+  if (packageJsonHasUiFramework(projectDir)) return true;
+  return treeHasComponentFile(projectDir);
+}
diff --git a/src/ui-safety-gate.cts b/src/ui-safety-gate.cts
index 88649a74a..cf4959741 100644
--- a/src/ui-safety-gate.cts
+++ b/src/ui-safety-gate.cts
@@ -16,7 +16,8 @@
  * matched; "micro-frontend" and "micro frontend" ARE matched).
  *
  * Public API:
- *   checkUiPresence(text: string): { hasUI: boolean, tokens: string[] }
+ *   checkUiPresence(text: string): { hasUI: boolean, tokens: string[],
+ *                                    matchedToken: string|null, matchedLine: string|null }
  *
  * CLI usage — reads phase-section text from STDIN to avoid ARG_MAX limits:
  *   echo "$PHASE_SECTION" | node gsd-core/bin/lib/ui-safety-gate.cjs
@@ -32,6 +33,14 @@
 export interface UiPresenceResult {
   hasUI: boolean;
   tokens: string[];
+  /**
+   * #3312: first token matched (lowercased) and the line it matched on, so gate
+   * consumers can surface WHAT tripped the sniffer without re-reading the source.
+   * Null when nothing matched (or when `**UI hint**: yes` short-circuits with no
+   * token match — the declaration, not vocabulary, is then the signal).
+   */
+  matchedToken: string | null;
+  matchedLine: string | null;
 }
 
 export const UI_TOKENS: ReadonlyArray<string> = [
@@ -71,7 +80,7 @@ const UI_GATE_PATTERN_GLOBAL = new RegExp(UI_GATE_PATTERN.source, 'gi');
  */
 export function checkUiPresence(text: string): UiPresenceResult {
   if (typeof text !== 'string') {
-    return { hasUI: false, tokens: [] };
+    return { hasUI: false, tokens: [], matchedToken: null, matchedLine: null };
   }
 
   // Normalise CRLF so the pattern sees consistent line boundaries.
@@ -96,22 +105,30 @@ export function checkUiPresence(text: string): UiPresenceResult {
     .join('\n');
 
   const found = new Set<string>();
+  let matchedToken: string | null = null;
+  let matchedLine: string | null = null;
   for (const line of sniffable.split('\n')) {
     // Reset lastIndex before each line so the global pattern restarts from 0.
     UI_GATE_PATTERN_GLOBAL.lastIndex = 0;
     for (const m of line.matchAll(UI_GATE_PATTERN_GLOBAL)) {
+      if (matchedToken === null) {
+        // #3312: record the FIRST match so gate consumers can surface the
+        // triggering token/line for one-second operator triage.
+        matchedToken = m[2].toLowerCase();
+        matchedLine = line;
+      }
       found.add(m[2].toLowerCase());
     }
   }
 
   if (hint === 'no') {
-    return { hasUI: false, tokens: [] };
+    return { hasUI: false, tokens: [], matchedToken: null, matchedLine: null };
   }
   if (hint === 'yes') {
-    return { hasUI: true, tokens: [...found] };
+    return { hasUI: true, tokens: [...found], matchedToken, matchedLine };
   }
 
-  return { hasUI: found.size > 0, tokens: [...found] };
+  return { hasUI: found.size > 0, tokens: [...found], matchedToken, matchedLine };
 }
 
 // ── CLI entry point ─────────────────────────────────────────────────────────
diff --git a/tests/check-ui-plan-gate.test.cjs b/tests/check-ui-plan-gate.test.cjs
index 76f99fe75..69a41960e 100644
--- a/tests/check-ui-plan-gate.test.cjs
+++ b/tests/check-ui-plan-gate.test.cjs
@@ -33,8 +33,11 @@ const { computeUiPlanGate } = require('../gsd-core/bin/lib/check-command-router.
  *   .planning/ROADMAP.md   — one phase section with `phaseSection` body
  *   .planning/phases/01-test-phase/  — phase directory
  *   (optionally) a *-UI-SPEC.md inside the phase dir
+ *   (optionally) static frontend evidence (#3312): 'component-file' writes
+ *   src/App.tsx; 'package-json' writes a package.json with a react dependency;
+ *   false (default) writes no frontend evidence at all (markdown/bash repo).
  */
-function makeProject({ phaseSection = '', hasUiSpec = false } = {}) {
+function makeProject({ phaseSection = '', hasUiSpec = false, frontendEvidence = 'component-file' } = {}) {
   const tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'ui-plan-gate-test-'));
   const planningDir = path.join(tmpDir, '.planning');
   const phasesDir = path.join(planningDir, 'phases');
@@ -42,6 +45,16 @@ function makeProject({ phaseSection = '', hasUiSpec = false } = {}) {
 
   fs.mkdirSync(phaseDir, { recursive: true });
   fs.writeFileSync(path.join(planningDir, 'config.json'), JSON.stringify({}), 'utf8');
+  if (frontendEvidence === 'component-file') {
+    fs.mkdirSync(path.join(tmpDir, 'src'), { recursive: true });
+    fs.writeFileSync(path.join(tmpDir, 'src', 'App.tsx'), 'export function App() { return null; }\n', 'utf8');
+  } else if (frontendEvidence === 'package-json') {
+    fs.writeFileSync(
+      path.join(tmpDir, 'package.json'),
+      JSON.stringify({ name: 'fixture', dependencies: { react: '^18.3.1' } }),
+      'utf8',
+    );
+  }
 
   // Minimal ROADMAP.md with one phase section
   const roadmapContent = [
@@ -100,7 +113,10 @@ describe('computeUiPlanGate — ui.plan-gate check logic (#1026)', () => {
       assert.ok('uiSpecPath' in result, 'uiSpecPath key must be present');
     });
 
-    test('block invariant: block === frontend && !hasUiSpec for all scenarios', () => {
+    test('block invariant: block === frontend && hasFrontendEvidence && !hasUiSpec for all scenarios', () => {
+      // #3312: block additionally requires static frontend evidence — token match
+      // alone no longer blocks (hyphenated proper nouns like `dashboard-financeiro`
+      // satisfy the sniffer's word boundary).
       for (const [label, { tmpDir }] of [
         ['frontendNoSpec', frontendNoSpec],
         ['frontendWithSpec', frontendWithSpec],
@@ -109,8 +125,8 @@ describe('computeUiPlanGate — ui.plan-gate check logic (#1026)', () => {
         const r = computeUiPlanGate(tmpDir, '1');
         assert.strictEqual(
           r.block,
-          r.frontend && !r.hasUiSpec,
-          `${label}: block invariant violated — frontend=${r.frontend} hasUiSpec=${r.hasUiSpec} block=${r.block}`,
+          r.frontend && r.hasFrontendEvidence && !r.hasUiSpec,
+          `${label}: block invariant violated — frontend=${r.frontend} hasFrontendEvidence=${r.hasFrontendEvidence} hasUiSpec=${r.hasUiSpec} block=${r.block}`,
         );
       }
     });
@@ -315,4 +331,132 @@ describe('computeUiPlanGate — ui.plan-gate check logic (#1026)', () => {
       }
     });
   });
+
+  // ── #3312: token match alone must NOT block — static structural corroboration ──
+
+  describe('#3312 structural corroboration — hyphenated proper nouns in non-frontend repos', () => {
+    test('dashboard-financeiro mention, repo with NO frontend evidence → frontend:true but block:false', () => {
+      // The reporter's exact shape: a markdown+bash+config repo (no src/, no
+      // package.json, no component files) whose phase names the repo
+      // `dashboard-financeiro`. The sniffer legitimately matches `dashboard`
+      // (hyphen is a word boundary — same rule that catches `micro-frontend`),
+      // but the gate must not BLOCK without structural frontend evidence.
+      const proj = makeProject({
+        phaseSection: 'Fix broken references in dashboard-financeiro, update .env.tpl and CI workflows.',
+        hasUiSpec: false,
+        frontendEvidence: false,
+      });
+      try {
+        const r = computeUiPlanGate(proj.tmpDir, '1');
+        assert.strictEqual(r.frontend, true,
+          'the token match itself still registers (sniffer semantics unchanged)');
+        assert.strictEqual(r.hasFrontendEvidence, false,
+          'a repo with no component files and no UI-framework dep has no frontend evidence');
+        assert.strictEqual(r.block, false,
+          '#3312: token match without structural evidence must NOT block planning');
+        assert.strictEqual(r.uiSpecPath, null);
+      } finally {
+        try { cleanup(proj.tmpDir); } catch { /* ignore */ }
+      }
+    });
+
+    test('same proper-noun mention WITH component file in tree → block:true (corroboration restores block)', () => {
+      const proj = makeProject({
+        phaseSection: 'Fix broken references in dashboard-financeiro and adjust the nav layout.',
+        hasUiSpec: false,
+        frontendEvidence: 'component-file',
+      });
+      try {
+        const r = computeUiPlanGate(proj.tmpDir, '1');
+        assert.strictEqual(r.frontend, true);
+        assert.strictEqual(r.hasFrontendEvidence, true, 'src/App.tsx is frontend evidence');
+        assert.strictEqual(r.block, true, 'token match + evidence + no spec → block');
+      } finally {
+        try { cleanup(proj.tmpDir); } catch { /* ignore */ }
+      }
+    });
+
+    test('package.json with a UI-framework dependency counts as frontend evidence', () => {
+      const proj = makeProject({
+        phaseSection: 'Rebuild the dashboard for the finance team.',
+        hasUiSpec: false,
+        frontendEvidence: 'package-json',
+      });
+      try {
+        const r = computeUiPlanGate(proj.tmpDir, '1');
+        assert.strictEqual(r.hasFrontendEvidence, true,
+          'package.json with a react dependency is frontend evidence even with no component files yet');
+        assert.strictEqual(r.block, true);
+      } finally {
+        try { cleanup(proj.tmpDir); } catch { /* ignore */ }
+      }
+    });
+
+    test('plain prose UI phase in a repo with NO frontend evidence → block:false (general rule, not a token denylist)', () => {
+      const proj = makeProject({
+        phaseSection: 'Build the user interface and dashboard components for the frontend.',
+        hasUiSpec: false,
+        frontendEvidence: false,
+      });
+      try {
+        const r = computeUiPlanGate(proj.tmpDir, '1');
+        assert.strictEqual(r.frontend, true);
+        assert.strictEqual(r.hasFrontendEvidence, false);
+        assert.strictEqual(r.block, false,
+          'corroboration is required for EVERY token match, not just proper-noun shapes');
+      } finally {
+        try { cleanup(proj.tmpDir); } catch { /* ignore */ }
+      }
+    });
+
+    test('matchedToken/matchedLine surface what tripped the sniffer (issue: judge in one second)', () => {
+      const proj = makeProject({
+        phaseSection: 'Deliverables: .env.tpl, CI workflows.\n\nReferences: dashboard-financeiro repo.',
+        hasUiSpec: false,
+        frontendEvidence: false,
+      });
+      try {
+        const r = computeUiPlanGate(proj.tmpDir, '1');
+        assert.strictEqual(r.matchedToken, 'dashboard', 'first matched token is surfaced');
+        assert.ok(
+          typeof r.matchedLine === 'string' && r.matchedLine.includes('dashboard-financeiro'),
+          'first matching line is surfaced so the operator can see the proper-noun context',
+        );
+      } finally {
+        try { cleanup(proj.tmpDir); } catch { /* ignore */ }
+      }
+    });
+
+    test('matchedToken/matchedLine are null for non-frontend phases', () => {
+      const proj = makeProject({
+        phaseSection: 'Add a REST API endpoint and database migration for the user table.',
+        hasUiSpec: false,
+        frontendEvidence: 'component-file',
+      });
+      try {
+        const r = computeUiPlanGate(proj.tmpDir, '1');
+        assert.strictEqual(r.frontend, false);
+        assert.strictEqual(r.matchedToken, null);
+        assert.strictEqual(r.matchedLine, null);
+      } finally {
+        try { cleanup(proj.tmpDir); } catch { /* ignore */ }
+      }
+    });
+
+    test('UI-SPEC present + token match + evidence → block:false (spec still satisfies the gate)', () => {
+      const proj = makeProject({
+        phaseSection: 'Build the frontend dashboard with React components.',
+        hasUiSpec: true,
+        frontendEvidence: 'component-file',
+      });
+      try {
+        const r = computeUiPlanGate(proj.tmpDir, '1');
+        assert.strictEqual(r.frontend, true);
+        assert.strictEqual(r.hasUiSpec, true);
+        assert.strictEqual(r.block, false);
+      } finally {
+        try { cleanup(proj.tmpDir); } catch { /* ignore */ }
+      }
+    });
+  });
 });
diff --git a/tests/plan-pre-hook-e2e.test.cjs b/tests/plan-pre-hook-e2e.test.cjs
index 0e0d75600..6fc0916f9 100644
--- a/tests/plan-pre-hook-e2e.test.cjs
+++ b/tests/plan-pre-hook-e2e.test.cjs
@@ -295,19 +295,71 @@ describe('check ui.plan-gate — frontend phase, no UI-SPEC', () => {
       ].join('\n'),
       'utf8',
     );
+    // Static frontend evidence (#3312): block requires token match AND structural
+    // corroboration — this fixture is a real frontend repo.
+    fs.mkdirSync(path.join(tmpDir, 'src'), { recursive: true });
+    fs.writeFileSync(path.join(tmpDir, 'src', 'App.tsx'), 'export function App() { return null; }\n', 'utf8');
     // No UI-SPEC.md in phase dir
   });
   after(() => cleanup(tmpDir));
 
-  test('[happy] frontend phase + no UI-SPEC: block:true, frontend:true, hasUiSpec:false, exit 0', () => {
+  test('[happy] frontend phase + evidence + no UI-SPEC: block:true, frontend:true, hasUiSpec:false, exit 0', () => {
     const result = runTools(['check', 'ui.plan-gate', '1', '--raw'], tmpDir);
     assert.strictEqual(result.status, 0, `exit non-zero. stderr=${result.stderr?.slice(0, 300)}`);
     const out = parseEnvelope(result, 'ui-plan-gate-no-spec');
 
     assert.strictEqual(out.frontend, true, 'frontend must be true for frontend-keyword phase');
+    assert.strictEqual(out.hasFrontendEvidence, true, 'src/App.tsx is frontend evidence');
     assert.strictEqual(out.hasUiSpec, false, 'hasUiSpec must be false when no spec file exists');
-    assert.strictEqual(out.block, true, 'block must be true (frontend && !hasUiSpec)');
+    assert.strictEqual(out.block, true, 'block must be true (frontend && hasFrontendEvidence && !hasUiSpec)');
     assert.strictEqual(out.uiSpecPath, null, 'uiSpecPath must be null when spec absent');
+    // matchedToken is the FIRST match in the phase section — the "## Phase 1:
+    // Dashboard" heading precedes the body, so the first match is `dashboard`.
+    assert.strictEqual(out.matchedToken, 'dashboard', 'matchedToken surfaces what tripped the sniffer');
+  });
+});
+
+// ─── 6b. check ui.plan-gate: #3312 — token match without frontend evidence ────
+
+describe('check ui.plan-gate — #3312 proper-noun token match, no frontend evidence', () => {
+  let tmpDir;
+  before(() => {
+    tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'plan-pre-ui-gate-3312-'));
+    const planningDir = path.join(tmpDir, '.planning');
+    fs.mkdirSync(path.join(planningDir, 'phases', '01-infra'), { recursive: true });
+    fs.writeFileSync(path.join(planningDir, 'config.json'), '{}', 'utf8');
+    fs.writeFileSync(
+      path.join(planningDir, 'ROADMAP.md'),
+      [
+        '# Project Roadmap',
+        '',
+        '## Phase 1: Infra',
+        '',
+        'Fix broken references in dashboard-financeiro, update .env.tpl and CI workflows.',
+        '',
+      ].join('\n'),
+      'utf8',
+    );
+    // Markdown/bash/config repo by design: no src/, no package.json, no component files.
+  });
+  after(() => cleanup(tmpDir));
+
+  test('[regression] dashboard-financeiro mention in non-frontend repo: frontend:true but block:false', () => {
+    const result = runTools(['check', 'ui.plan-gate', '1', '--raw'], tmpDir);
+    assert.strictEqual(result.status, 0, `exit non-zero. stderr=${result.stderr?.slice(0, 300)}`);
+    const out = parseEnvelope(result, 'ui-plan-gate-3312');
+
+    assert.strictEqual(out.frontend, true,
+      'sniffer still matches `dashboard` at the hyphen boundary (micro-frontend rule)');
+    assert.strictEqual(out.hasFrontendEvidence, false,
+      'markdown/bash repo has no component files and no UI-framework dependency');
+    assert.strictEqual(out.block, false,
+      '#3312: token match without structural evidence must NOT block planning');
+    assert.strictEqual(out.matchedToken, 'dashboard', 'matchedToken surfaces the proper-noun trigger');
+    assert.ok(
+      typeof out.matchedLine === 'string' && out.matchedLine.includes('dashboard-financeiro'),
+      'matchedLine surfaces the line for one-second operator triage',
+    );
   });
 });
 
diff --git a/tests/ui-safety-gate.test.cjs b/tests/ui-safety-gate.test.cjs
index 6d2d0bd40..8ea706f0f 100644
--- a/tests/ui-safety-gate.test.cjs
+++ b/tests/ui-safety-gate.test.cjs
@@ -23,13 +23,13 @@ describe('UI_TOKENS', () => {
 });
 
 describe('checkUiPresence', () => {
-  test('returns { hasUI: false, tokens: [] } for non-string input', () => {
-    assert.deepStrictEqual(checkUiPresence(42), { hasUI: false, tokens: [] });
-    assert.deepStrictEqual(checkUiPresence(null), { hasUI: false, tokens: [] });
+  test('returns { hasUI: false, tokens: [], matchedToken: null, matchedLine: null } for non-string input', () => {
+    assert.deepStrictEqual(checkUiPresence(42), { hasUI: false, tokens: [], matchedToken: null, matchedLine: null });
+    assert.deepStrictEqual(checkUiPresence(null), { hasUI: false, tokens: [], matchedToken: null, matchedLine: null });
   });
 
   test('returns false for empty string', () => {
-    assert.deepStrictEqual(checkUiPresence(''), { hasUI: false, tokens: [] });
+    assert.deepStrictEqual(checkUiPresence(''), { hasUI: false, tokens: [], matchedToken: null, matchedLine: null });
   });
 
   test('detects standalone UI token (case-insensitive)', () => {
@@ -61,6 +61,38 @@ describe('checkUiPresence', () => {
     assert.ok(result.tokens.includes('frontend'));
   });
 
+  // ── #3312: hyphenated proper nouns DO match the sniffer (by design — the same
+  // boundary rule that catches `micro-frontend`). The false-positive fix lives in
+  // the GATE (computeUiPlanGate structural corroboration), NOT in the sniffer:
+  // weakening this rule would regress `micro-frontend`. These tests pin the
+  // sniffer behavior AND the matchedToken/matchedLine introspection fields the
+  // gate forwards so an operator can see what tripped it.
+
+  test('#3312 hyphenated proper noun (dashboard-financeiro) matches the sniffer — surfaced via matchedToken/matchedLine', () => {
+    const result = checkUiPresence('Fix broken references in dashboard-financeiro and .env.tpl.');
+    assert.strictEqual(result.hasUI, true,
+      'the sniffer matches `dashboard` at the hyphen boundary — this is the #3312 trigger, intentionally preserved');
+    assert.deepStrictEqual(result.tokens, ['dashboard']);
+    assert.strictEqual(result.matchedToken, 'dashboard');
+    assert.ok(
+      typeof result.matchedLine === 'string' && result.matchedLine.includes('dashboard-financeiro'),
+      'matchedLine carries the first matching line so the operator sees the proper-noun context',
+    );
+  });
+
+  test('matchedLine is the FIRST line containing a match', () => {
+    const result = checkUiPresence('Intro line with no tokens.\nBuild the login form.\nAlso a dashboard.');
+    assert.strictEqual(result.matchedToken, 'form');
+    assert.strictEqual(result.matchedLine, 'Build the login form.');
+  });
+
+  test('`**UI hint**: yes` with no token matches reports null matchedToken/matchedLine', () => {
+    const result = checkUiPresence('**UI hint**: yes\n\nBackend API refactor.\n');
+    assert.strictEqual(result.hasUI, true, 'hint:yes is authoritative');
+    assert.strictEqual(result.matchedToken, null);
+    assert.strictEqual(result.matchedLine, null);
+  });
+
   test('normalises CRLF line endings', () => {
     const result = checkUiPresence('Phase 1\r\nBuild a form\r\nDone');
     assert.ok(result.hasUI);