diff --git a/get-shit-done/bin/lib/phase.cjs b/get-shit-done/bin/lib/phase.cjs
index 805c475b..9e829f06 100644
--- a/get-shit-done/bin/lib/phase.cjs
+++ b/get-shit-done/bin/lib/phase.cjs
@@ -625,7 +625,7 @@ function renameIntegerPhases(phasesDir, removedInt) {
       const m = dir.match(/^(\d+)([A-Z])?(?:\.(\d+))?-(.+)$/i);
       if (!m) return null;
       const dirInt = parseInt(m[1], 10);
-      return dirInt > removedInt ? { dir, oldInt: dirInt, letter: m[2] ? m[2].toUpperCase() : '', decimal: m[3] ? parseInt(m[3], 10) : null, slug: m[4] } : null;
+      return (dirInt > removedInt && dirInt < 999) ? { dir, oldInt: dirInt, letter: m[2] ? m[2].toUpperCase() : '', decimal: m[3] ? parseInt(m[3], 10) : null, slug: m[4] } : null;
     })
     .filter(Boolean)
     .sort((a, b) => a.oldInt !== b.oldInt ? b.oldInt - a.oldInt : (b.decimal || 0) - (a.decimal || 0));
@@ -673,7 +673,7 @@ function updateRoadmapAfterPhaseRemoval(roadmapPath, targetPhase, isDecimal, rem
         const oldPad = oldStr.padStart(2, '0'), newPad = newStr.padStart(2, '0');
         content = content.replace(new RegExp(`(#{2,4}\\s*Phase\\s+)${oldStr}(\\s*:)`, 'gi'), `$1${newStr}$2`);
         content = content.replace(new RegExp(`(Phase\\s+)${oldStr}([:\\s])`, 'g'), `$1${newStr}$2`);
-        content = content.replace(new RegExp(`${oldPad}-(\\d{2})`, 'g'), `${newPad}-$1`);
+        content = content.replace(new RegExp(`(?<![0-9-])${oldPad}-(\\d{2})(?![0-9-])`, 'g'), `${newPad}-$1`);
         content = content.replace(new RegExp(`(\\|\\s*)${oldStr}\\.\\s`, 'g'), `$1${newStr}. `);
         content = content.replace(new RegExp(`(Depends on:\\*\\*\\s*Phase\\s+)${oldStr}\\b`, 'gi'), `$1${newStr}`);
       }
diff --git a/tests/phase.test.cjs b/tests/phase.test.cjs
index 92cfa3f5..0b4d500a 100644
--- a/tests/phase.test.cjs
+++ b/tests/phase.test.cjs
@@ -1268,6 +1268,142 @@ describe('phase remove command', () => {
     const state = fs.readFileSync(path.join(tmpDir, '.planning', 'STATE.md'), 'utf-8');
     assert.ok(state.includes('**Total Phases:** 1'), 'total phases should be decremented');
   });
+
+  test('bug-2434: integer phase remove does not rename 999.x backlog directory', () => {
+    // Setup: an active integer phase 4 and a backlog phase 999.1
+    fs.writeFileSync(
+      path.join(tmpDir, '.planning', 'ROADMAP.md'),
+      `# Roadmap
+
+### Phase 1: Foundation
+**Goal:** Setup
+
+### Phase 2: Auth
+**Goal:** Authentication
+
+### Phase 3: Features
+**Goal:** Core features
+
+### Phase 4: Extras
+**Goal:** Extra stuff
+
+### Phase 999.1: Backlog item
+**Goal:** Parked backlog task
+`
+    );
+
+    fs.mkdirSync(path.join(tmpDir, '.planning', 'phases', '01-foundation'), { recursive: true });
+    fs.mkdirSync(path.join(tmpDir, '.planning', 'phases', '02-auth'), { recursive: true });
+    fs.mkdirSync(path.join(tmpDir, '.planning', 'phases', '03-features'), { recursive: true });
+    fs.mkdirSync(path.join(tmpDir, '.planning', 'phases', '04-extras'), { recursive: true });
+    fs.mkdirSync(path.join(tmpDir, '.planning', 'phases', '999.1-backlog-item'), { recursive: true });
+
+    const result = runGsdTools('phase remove 4', tmpDir);
+    assert.ok(result.success, `Command failed: ${result.error}`);
+
+    // Backlog directory must remain at 999.1, not be decremented to 998.1
+    assert.ok(
+      fs.existsSync(path.join(tmpDir, '.planning', 'phases', '999.1-backlog-item')),
+      'backlog directory 999.1-backlog-item must not be renamed'
+    );
+    assert.ok(
+      !fs.existsSync(path.join(tmpDir, '.planning', 'phases', '998.1-backlog-item')),
+      'backlog directory must not be incorrectly renamed to 998.1'
+    );
+  });
+
+  test('bug-2435: integer phase remove does not corrupt YYYY-MM-DD dates in ROADMAP.md', () => {
+    // Setup: removing phase 4 from a roadmap containing 2026-04-14 date strings
+    fs.writeFileSync(
+      path.join(tmpDir, '.planning', 'ROADMAP.md'),
+      `# Roadmap
+
+### Phase 1: Foundation
+**Goal:** Setup
+**Completed:** 2026-01-15
+
+### Phase 2: Auth
+**Goal:** Authentication
+**Completed:** 2026-02-20
+
+### Phase 3: Features
+**Goal:** Core features
+**Completed:** 2026-04-14
+
+### Phase 4: Extras
+**Goal:** Extra stuff
+
+### Phase 5: Final
+**Goal:** Final phase
+`
+    );
+
+    fs.mkdirSync(path.join(tmpDir, '.planning', 'phases', '01-foundation'), { recursive: true });
+    fs.mkdirSync(path.join(tmpDir, '.planning', 'phases', '02-auth'), { recursive: true });
+    fs.mkdirSync(path.join(tmpDir, '.planning', 'phases', '03-features'), { recursive: true });
+    fs.mkdirSync(path.join(tmpDir, '.planning', 'phases', '04-extras'), { recursive: true });
+    fs.mkdirSync(path.join(tmpDir, '.planning', 'phases', '05-final'), { recursive: true });
+
+    const result = runGsdTools('phase remove 4', tmpDir);
+    assert.ok(result.success, `Command failed: ${result.error}`);
+
+    const roadmap = fs.readFileSync(path.join(tmpDir, '.planning', 'ROADMAP.md'), 'utf-8');
+
+    // Dates must be preserved exactly
+    assert.ok(roadmap.includes('2026-01-15'), 'date 2026-01-15 must not be corrupted');
+    assert.ok(roadmap.includes('2026-02-20'), 'date 2026-02-20 must not be corrupted');
+    assert.ok(roadmap.includes('2026-04-14'), 'date 2026-04-14 must not be corrupted');
+
+    // Phase 5 should be renumbered to 4
+    assert.ok(roadmap.includes('Phase 4: Final'), 'Phase 5 should be renumbered to Phase 4');
+  });
+
+  test('bug-2435: integer phase remove does not corrupt date whose month matches removed phase number', () => {
+    // Setup: removing phase 4 from a roadmap containing 2026-05-14
+    // When renumbering phase 5→4, the regex must not replace "05-14" in the date "2026-05-14"
+    fs.writeFileSync(
+      path.join(tmpDir, '.planning', 'ROADMAP.md'),
+      `# Roadmap
+
+### Phase 1: Foundation
+**Goal:** Setup
+**Completed:** 2026-01-15
+
+### Phase 2: Auth
+**Goal:** Authentication
+**Completed:** 2026-02-20
+
+### Phase 3: Features
+**Goal:** Core features
+**Completed:** 2026-03-10
+
+### Phase 4: Extras
+**Goal:** Extra stuff
+
+### Phase 5: Final
+**Goal:** Final phase
+**Due:** 2026-05-14
+`
+    );
+
+    fs.mkdirSync(path.join(tmpDir, '.planning', 'phases', '01-foundation'), { recursive: true });
+    fs.mkdirSync(path.join(tmpDir, '.planning', 'phases', '02-auth'), { recursive: true });
+    fs.mkdirSync(path.join(tmpDir, '.planning', 'phases', '03-features'), { recursive: true });
+    fs.mkdirSync(path.join(tmpDir, '.planning', 'phases', '04-extras'), { recursive: true });
+    fs.mkdirSync(path.join(tmpDir, '.planning', 'phases', '05-final'), { recursive: true });
+
+    const result = runGsdTools('phase remove 4', tmpDir);
+    assert.ok(result.success, `Command failed: ${result.error}`);
+
+    const roadmap = fs.readFileSync(path.join(tmpDir, '.planning', 'ROADMAP.md'), 'utf-8');
+
+    // Date "2026-05-14" must not be corrupted to "2026-04-14" when phase 5 is renumbered to 4
+    assert.ok(roadmap.includes('2026-05-14'), 'date 2026-05-14 must not be corrupted when renumbering phase 5→4');
+    assert.ok(!roadmap.includes('2026-04-14'), 'date must not be incorrectly mutated to 2026-04-14');
+
+    // Phase 5 should be renumbered to 4
+    assert.ok(roadmap.includes('Phase 4: Final'), 'Phase 5 should be renumbered to Phase 4');
+  });
 });
 
 // ─────────────────────────────────────────────────────────────────────────────