diff --git a/migrations/105_memo_support.sql b/migrations/105_memo_support.sql
index 3e1da89..8f54ff4 100644
--- a/migrations/105_memo_support.sql
+++ b/migrations/105_memo_support.sql
@@ -1,28 +1,2 @@
--- 105: 메모(note) 기능 지원
--- 메모 = file_type='note'인 document (파일 없는 문서)
--- file_hash는 note에서 content SHA-256 (파일 해시가 아닌 본문 버전 해시)
-
--- source_channel enum에 'memo' 추가 (유입 경로: 내장 메모 UI)
-ALTER TYPE source_channel ADD VALUE IF NOT EXISTS 'memo';
-
--- file_path: NOT NULL 제거 (메모는 파일 없음)
-ALTER TABLE documents ALTER COLUMN file_path DROP NOT NULL;
-
--- file_path: 기존 UNIQUE → partial unique (NULL 허용, 값 있으면 유니크)
-DROP INDEX IF EXISTS documents_file_path_key;
-CREATE UNIQUE INDEX IF NOT EXISTS uq_documents_file_path
-  ON documents(file_path) WHERE file_path IS NOT NULL;
-
--- user_tags: 사용자 수동 태그 (ai_tags와 분리, list[str])
-ALTER TABLE documents ADD COLUMN IF NOT EXISTS user_tags JSONB DEFAULT '[]'::jsonb;
-
--- pinned: 메모 핀 고정
-ALTER TABLE documents ADD COLUMN IF NOT EXISTS pinned BOOLEAN DEFAULT false;
-
--- ask_includable: /ask 합성 포함 여부 (false면 검색은 되지만 /ask evidence에서 제외)
-ALTER TABLE documents ADD COLUMN IF NOT EXISTS ask_includable BOOLEAN DEFAULT true;
-
--- 메모 목록 최적화 인덱스 (핀 우선 + 최신순)
-CREATE INDEX IF NOT EXISTS idx_documents_notes
-  ON documents(pinned DESC, created_at DESC)
-  WHERE file_type = 'note' AND deleted_at IS NULL;
+-- 105: source_channel enum에 'memo' 추가 (메모 유입 경로)
+ALTER TYPE source_channel ADD VALUE IF NOT EXISTS 'memo'
diff --git a/migrations/106_memo_file_path_nullable.sql b/migrations/106_memo_file_path_nullable.sql
new file mode 100644
index 0000000..064e078
--- /dev/null
+++ b/migrations/106_memo_file_path_nullable.sql
@@ -0,0 +1,2 @@
+-- 106: file_path NOT NULL 제거 (메모는 파일 없는 문서)
+ALTER TABLE documents ALTER COLUMN file_path DROP NOT NULL
diff --git a/migrations/107_memo_file_path_partial_unique.sql b/migrations/107_memo_file_path_partial_unique.sql
new file mode 100644
index 0000000..4d41b62
--- /dev/null
+++ b/migrations/107_memo_file_path_partial_unique.sql
@@ -0,0 +1,2 @@
+-- 107: file_path UNIQUE → partial unique (NULL 허용, 값 있으면 유니크)
+DROP INDEX IF EXISTS documents_file_path_key
diff --git a/migrations/108_memo_file_path_partial_unique_idx.sql b/migrations/108_memo_file_path_partial_unique_idx.sql
new file mode 100644
index 0000000..12d2d07
--- /dev/null
+++ b/migrations/108_memo_file_path_partial_unique_idx.sql
@@ -0,0 +1,2 @@
+-- 108: file_path partial unique 인덱스 생성
+CREATE UNIQUE INDEX IF NOT EXISTS uq_documents_file_path ON documents(file_path) WHERE file_path IS NOT NULL
diff --git a/migrations/109_memo_columns.sql b/migrations/109_memo_columns.sql
new file mode 100644
index 0000000..e455419
--- /dev/null
+++ b/migrations/109_memo_columns.sql
@@ -0,0 +1,3 @@
+-- 109: 메모 지원 컬럼 추가 (user_tags, pinned, ask_includable)
+-- file_hash는 note에서 content SHA-256 (파일 해시가 아닌 본문 버전 해시)
+ALTER TABLE documents ADD COLUMN IF NOT EXISTS user_tags JSONB DEFAULT '[]'::jsonb
diff --git a/migrations/110_memo_pinned.sql b/migrations/110_memo_pinned.sql
new file mode 100644
index 0000000..c6b1cce
--- /dev/null
+++ b/migrations/110_memo_pinned.sql
@@ -0,0 +1,2 @@
+-- 110: 메모 핀 고정 컬럼
+ALTER TABLE documents ADD COLUMN IF NOT EXISTS pinned BOOLEAN DEFAULT false
diff --git a/migrations/111_memo_ask_includable.sql b/migrations/111_memo_ask_includable.sql
new file mode 100644
index 0000000..52ac055
--- /dev/null
+++ b/migrations/111_memo_ask_includable.sql
@@ -0,0 +1,2 @@
+-- 111: /ask 합성 포함 여부 (false면 검색은 되지만 /ask evidence에서 제외)
+ALTER TABLE documents ADD COLUMN IF NOT EXISTS ask_includable BOOLEAN DEFAULT true
diff --git a/migrations/112_memo_notes_index.sql b/migrations/112_memo_notes_index.sql
new file mode 100644
index 0000000..9cf1a45
--- /dev/null
+++ b/migrations/112_memo_notes_index.sql
@@ -0,0 +1,2 @@
+-- 112: 메모 목록 최적화 인덱스 (핀 우선 + 최신순)
+CREATE INDEX IF NOT EXISTS idx_documents_notes ON documents(pinned DESC, created_at DESC) WHERE file_type = 'note' AND deleted_at IS NULL