diff --git a/.changeset/3602-phase-remove-slugged-plan-refs.md b/.changeset/3602-phase-remove-slugged-plan-refs.md
new file mode 100644
index 000000000..f2795cf3b
--- /dev/null
+++ b/.changeset/3602-phase-remove-slugged-plan-refs.md
@@ -0,0 +1,5 @@
+---
+type: Fixed
+issue: 3602
+---
+**`phase remove N` now renumbers slugged plan references in ROADMAP.md** — the plan-reference renumbering regex in `get-shit-done/bin/lib/phase.cjs:updateRoadmapAfterPhaseRemoval` previously only matched compact filenames like `07-01-PLAN.md`. A slug between the plan number and the `-PLAN.md` / `-SUMMARY.md` suffix (e.g. `07-01-cherry-pick-foundation-PLAN.md`) broke the lookahead, so the on-disk file was renamed but the ROADMAP entry kept pointing at the stale `07-01-…` prefix. The suffix lookahead now allows an optional kebab-case slug segment between the number and the canonical suffix.
diff --git a/get-shit-done/bin/lib/phase.cjs b/get-shit-done/bin/lib/phase.cjs
index 400aa6dcf..24dcba5ba 100644
--- a/get-shit-done/bin/lib/phase.cjs
+++ b/get-shit-done/bin/lib/phase.cjs
@@ -903,8 +903,17 @@ function updateRoadmapAfterPhaseRemoval(roadmapPath, targetPhase, isDecimal, rem
         /(\|\s*)(\d+)(\.\s)/g,
         (_match, prefix, num, suffix) => `${prefix}${decrementRoadmapPhaseNumber(num, removedInt)}${suffix}`
       );
+      // #3602: extend the suffix lookahead so slugged plan filenames like
+      // `07-01-cherry-pick-foundation-PLAN.md` match too. The previous
+      // pattern only allowed a compact `-(PLAN|SUMMARY).md` immediately
+      // after the plan number (or no suffix at all); a slug between the
+      // number and the `-PLAN.md` / `-SUMMARY.md` suffix made the
+      // lookahead fail and left the stale `07-01-` prefix in ROADMAP
+      // text while the on-disk file was already renamed to `06-01-…`.
+      // The slug segment `(?:-[A-Za-z][A-Za-z0-9-]*)*` allows any number
+      // of kebab-case tokens before the canonical PLAN/SUMMARY suffix.
       content = content.replace(
-        /(?<![0-9-])(\d{2})-(\d{2})(?=(?:-(?:PLAN|SUMMARY)\.md)?(?![0-9-]))/g,
+        /(?<![0-9-])(\d{2})-(\d{2})(?=(?:(?:-[A-Za-z][A-Za-z0-9-]*)*-(?:PLAN|SUMMARY)\.md)|(?![0-9-]))/g,
         (_match, phaseNum, planNum) => `${decrementRoadmapPaddedPhaseNumber(phaseNum, removedInt)}-${planNum}`
       );
       content = content.replace(
diff --git a/tests/bug-3602-phase-remove-renumbers-slugged-plan-refs.test.cjs b/tests/bug-3602-phase-remove-renumbers-slugged-plan-refs.test.cjs
new file mode 100644
index 000000000..c64aee867
--- /dev/null
+++ b/tests/bug-3602-phase-remove-renumbers-slugged-plan-refs.test.cjs
@@ -0,0 +1,179 @@
+/**
+ * Bug #3602: After `phase remove N`, ROADMAP references to slugged plan
+ * files (`07-01-cherry-pick-foundation-PLAN.md`) keep their old phase
+ * prefix while the on-disk file has already been renamed. The
+ * renumber-references regex in `phase.cjs` only matched compact forms
+ * (`07-01-PLAN.md`, bare `07-01`) — it did not allow a slug between the
+ * plan number and the `-PLAN.md` / `-SUMMARY.md` suffix.
+ *
+ * Fix: extend the lookahead to allow an optional `-<slug>` segment before
+ * the `-(PLAN|SUMMARY).md` suffix while still preserving the "bare token,
+ * not part of a longer number/identifier" alternative.
+ *
+ * Assertions go through the typed `roadmap get-phase --json` query so no
+ * test asserts on raw ROADMAP.md text content.
+ */
+
+'use strict';
+
+process.env.GSD_TEST_MODE = '1';
+
+const { describe, test, beforeEach, afterEach } = require('node:test');
+const assert = require('node:assert/strict');
+const fs = require('node:fs');
+const path = require('node:path');
+const { runGsdTools, createTempProject, cleanup } = require('./helpers.cjs');
+
+function writeRoadmap(tmpDir, body) {
+  fs.writeFileSync(path.join(tmpDir, '.planning', 'ROADMAP.md'), body);
+}
+function writeState(tmpDir, version) {
+  fs.writeFileSync(
+    path.join(tmpDir, '.planning', 'STATE.md'),
+    `---\nmilestone: ${version}\n---\n`,
+  );
+}
+function ensurePhaseDir(tmpDir, name) {
+  fs.mkdirSync(path.join(tmpDir, '.planning', 'phases', name), { recursive: true });
+}
+function ensurePlanFile(tmpDir, phaseDirName, planName) {
+  const p = path.join(tmpDir, '.planning', 'phases', phaseDirName, planName);
+  fs.mkdirSync(path.dirname(p), { recursive: true });
+  fs.writeFileSync(p, '# Plan\n');
+}
+function getPhase(tmpDir, phaseNum) {
+  const r = runGsdTools(['roadmap', 'get-phase', phaseNum, '--json'], tmpDir);
+  if (!r.success) return { found: false, error: r.error };
+  return JSON.parse(r.output);
+}
+
+describe('bug #3602: phase remove renumbers slugged plan references in ROADMAP', () => {
+  let tmpDir;
+  beforeEach(() => {
+    tmpDir = createTempProject('bug-3602-');
+  });
+  afterEach(() => {
+    cleanup(tmpDir);
+  });
+
+  test('slugged PLAN reference (07-01-cherry-pick-foundation-PLAN.md) is renumbered to 06-01-…', () => {
+    writeState(tmpDir, 'v1.0.0');
+    writeRoadmap(
+      tmpDir,
+      [
+        '# Roadmap',
+        '',
+        '## Current Milestone: v1.0.0',
+        '',
+        '### Phase 6: Old Work',
+        '**Goal:** RemoveThisGoal',
+        '',
+        '### Phase 7: New Work',
+        '**Goal:** Plans: 07-01-cherry-pick-foundation-PLAN.md and 07-02-finish-it-SUMMARY.md',
+        '',
+      ].join('\n'),
+    );
+    ensurePhaseDir(tmpDir, '06-old');
+    ensurePhaseDir(tmpDir, '07-new');
+    ensurePlanFile(tmpDir, '07-new', '07-01-cherry-pick-foundation-PLAN.md');
+    ensurePlanFile(tmpDir, '07-new', '07-02-finish-it-SUMMARY.md');
+
+    const r = runGsdTools(['phase', 'remove', '6'], tmpDir);
+    assert.ok(r.success, `phase remove failed: ${r.error || r.output}`);
+
+    // Phase 7 → Phase 6 after removal. The renumbered phase's recorded
+    // goal must reference the renumbered plan filenames (06-01-… and
+    // 06-02-…), not the stale 07-01-… / 07-02-… form.
+    const phase6 = getPhase(tmpDir, '6');
+    assert.strictEqual(phase6.found, true);
+    assert.strictEqual(phase6.phase_name, 'New Work');
+    assert.ok(
+      phase6.goal.includes('06-01-cherry-pick-foundation-PLAN.md'),
+      `Plans reference for slugged PLAN was not renumbered. Goal: ${phase6.goal}`,
+    );
+    assert.ok(
+      phase6.goal.includes('06-02-finish-it-SUMMARY.md'),
+      `Plans reference for slugged SUMMARY was not renumbered. Goal: ${phase6.goal}`,
+    );
+    assert.ok(
+      !phase6.goal.includes('07-01'),
+      `stale 07-01 prefix remains in ROADMAP. Goal: ${phase6.goal}`,
+    );
+    assert.ok(
+      !phase6.goal.includes('07-02'),
+      `stale 07-02 prefix remains in ROADMAP. Goal: ${phase6.goal}`,
+    );
+  });
+
+  test('compact PLAN/SUMMARY reference (07-01-PLAN.md) still renumbers (#3601 contract preserved)', () => {
+    writeState(tmpDir, 'v1.0.0');
+    writeRoadmap(
+      tmpDir,
+      [
+        '# Roadmap',
+        '',
+        '## Current Milestone: v1.0.0',
+        '',
+        '### Phase 6: Old',
+        '**Goal:** RemoveGoal',
+        '',
+        '### Phase 7: New',
+        '**Goal:** Plans: 07-01-PLAN.md and 07-02-SUMMARY.md',
+        '',
+      ].join('\n'),
+    );
+    ensurePhaseDir(tmpDir, '06-old');
+    ensurePhaseDir(tmpDir, '07-new');
+    ensurePlanFile(tmpDir, '07-new', '07-01-PLAN.md');
+    ensurePlanFile(tmpDir, '07-new', '07-02-SUMMARY.md');
+
+    const r = runGsdTools(['phase', 'remove', '6'], tmpDir);
+    assert.ok(r.success);
+
+    const phase6 = getPhase(tmpDir, '6');
+    assert.strictEqual(phase6.found, true);
+    assert.ok(phase6.goal.includes('06-01-PLAN.md'));
+    assert.ok(phase6.goal.includes('06-02-SUMMARY.md'));
+    assert.ok(!phase6.goal.includes('07-01-PLAN.md'));
+    assert.ok(!phase6.goal.includes('07-02-SUMMARY.md'));
+  });
+
+  test('does NOT renumber values that look like phase-plan tokens but are not (e.g. 2026-01-01 dates)', () => {
+    // Counter-test: an ISO date `2026-01-01` should NOT be matched by the
+    // renumber regex even though it superficially looks like NN-NN-NN.
+    // The negative lookbehind `(?<![0-9-])` and trailing lookahead must
+    // protect against false positives in dates and other digit clusters.
+    writeState(tmpDir, 'v1.0.0');
+    writeRoadmap(
+      tmpDir,
+      [
+        '# Roadmap',
+        '',
+        '## Current Milestone: v1.0.0',
+        '',
+        '### Phase 6: Old',
+        '**Goal:** RemoveGoal',
+        '',
+        '### Phase 7: Date safety',
+        '**Goal:** Created 2026-01-01 and tagged v1-2-3 — must not renumber',
+        '',
+      ].join('\n'),
+    );
+    ensurePhaseDir(tmpDir, '06-old');
+    ensurePhaseDir(tmpDir, '07-new');
+
+    const r = runGsdTools(['phase', 'remove', '6'], tmpDir);
+    assert.ok(r.success);
+
+    const phase6 = getPhase(tmpDir, '6');
+    assert.strictEqual(phase6.found, true);
+    assert.ok(
+      phase6.goal.includes('2026-01-01'),
+      `ISO date 2026-01-01 was wrongly modified. Goal: ${phase6.goal}`,
+    );
+    assert.ok(
+      phase6.goal.includes('v1-2-3'),
+      `version-tag v1-2-3 was wrongly modified. Goal: ${phase6.goal}`,
+    );
+  });
+});