diff --git a/journal.py b/journal.py
index 7241ac7..4c6356d 100644
--- a/journal.py
+++ b/journal.py
@@ -17,37 +17,31 @@ import traceback
 ### GLOBALS
 
 JOURNAL_PATH = Path.home() / '.journal.json'
-T = TypeVar('T')
-
-AnyCallable = Callable[..., Any]
-AnyDict = dict[str, Any]
-
-Journal = AnyDict
 
 ### UTILS
 
 
-def nth_or_default(n: int, l: list[T], default: T):
+def nth_or_default(n, l, default):
     return l[n] if n < len(l) else default
 
-def apply(f: AnyCallable, x: Any) -> Any:
+def apply(f, x):
     return f(x)
 
-def flip(f: AnyCallable) -> AnyCallable:
+def flip(f):
     return lambda a1, a2: f(a2, a1)
     
-def compose(*fns: AnyCallable) -> Any:
+def compose(*fns):
     return partial(reduce, flip(apply), fns)
 
-def wrap_text(text: str, columns: int = 80) -> str:
+def wrap_text(text, columns=80):
     return textwrap.fill(text, columns,
         replace_whitespace=False,
         break_on_hyphens=False,
         break_long_words=False)
 
-def split_keep(delims: list[str], string: str) -> list[str]:
-    res: list[str] = []
-    buf: list[str] = []
+def split_keep(delims, string):
+    res = []
+    buf = []
 
     def flush_buf():
         nonlocal res, buf
@@ -66,8 +60,8 @@ def split_keep(delims: list[str], string: str) -> list[str]:
 
     return res
 
-def merge_if(pred: Callable[[str, str], bool], l: list[str]) -> list[str]:
-    res: list[str] = []
+def merge_if(pred, l):
+    res = []
 
     for i, curr in enumerate(l):
         prev = l[i-1] if i-1 >= 0 else None
@@ -78,10 +72,10 @@ def merge_if(pred: Callable[[str, str], bool], l: list[str]) -> list[str]:
 
     return res
 
-def open_editor(fpath: Path) -> None:
+def open_editor(fpath):
     run(['nvim', '+', str(fpath)])
 
-def edit_text(text: str, suffix: str = '') -> str:
+def edit_text(text, suffix=''):
     fpath = Path(mktemp(suffix=suffix))
 
     fpath.write_text(text)
@@ -94,56 +88,56 @@ def edit_text(text: str, suffix: str = '') -> str:
     
     return text
 
-def prompt(text: str) -> bool:
+def prompt(text):
     return input(text + ' [y/n] ') == 'y'
 
 ### DATE UTILS
 
-def parse_date(date: str) -> datetime:
+def parse_date(date):
     return datetime.strptime(date, '%Y-%m-%d')
 
-def format_date(date: datetime) -> str:
+def format_date(date):
     return date.strftime('%Y-%m-%d')
 
-def today() -> datetime:
+def today():
     return datetime.now().replace(hour=0, minute=0, second=0, microsecond=0)
 
-def evaluate_time_expression(expression: str) -> Optional[datetime]:
+def evaluate_time_expression(expression):
     if expression == 'today':
         return datetime.now()
     elif expression == 'yesterday':
         return datetime.now() - timedelta(days=1)
 
-def get_abbr_for_weekday(date: str) -> str:
+def get_abbr_for_weekday(date):
     return {
         0: 'mo', 1: 'tu', 2: 'we', 3: 'th',
         4: 'fr', 5: 'sa', 6: 'su',
     }[parse_date(date).weekday()]
 
-def parse_timestamp(timestamp: str) -> int:
+def parse_timestamp(timestamp):
     return int(datetime.strptime(timestamp, '%Y-%m-%d %H:%M:%S').timestamp())
 
-def format_timestamp(timestamp: int) -> str:
+def format_timestamp(timestamp):
     return datetime.fromtimestamp(timestamp).strftime('%Y-%m-%d %H:%M:%S')
 
 ### FILE PARSERS
 
-def parse_foods_file(text: str) -> tuple[AnyDict, AnyDict]:
+def parse_foods_file(text):
     foods_str, recipes_str = text.split('---')
 
-    def parse_macro(macro: str) -> tuple[str, float]:
+    def parse_macro(macro):
         name, value = macro.split()
         return (name, float(value.removesuffix('g').removesuffix('kcal')))
 
-    foods: AnyDict = {
+    foods = {
         macros[0]: dict(parse_macro(macro) for macro in macros[1:])
         for macros in [food.split('\n') for food in foods_str.strip().split('\n\n')]
     }
 
-    recipes: AnyDict = {}
+    recipes = {}
 
-    def evaluate_ingredients(ingredients: list[str]) -> AnyDict:
-        result: dict[str, float] = {}
+    def evaluate_ingredients(ingredients):
+        result = {}
 
         total_weight = 0.0
         for ingredient in ingredients:
@@ -177,7 +171,7 @@ def parse_foods_file(text: str) -> tuple[AnyDict, AnyDict]:
 
     return foods, recipes
 
-def evaluate_food_entry(foods: AnyDict, recipes: AnyDict, value: float, name: str) -> AnyDict:
+def evaluate_food_entry(foods, recipes, value, name):
     if name in recipes:
         food = recipes[name]
 
@@ -197,8 +191,8 @@ def evaluate_food_entry(foods: AnyDict, recipes: AnyDict, value: float, name: st
 
     return food
 
-def parse_tasks_file(text: str) -> list[tuple[list[str], str]]:
-    result: list[tuple[list[str], str]] = []
+def parse_tasks_file(text):
+    result = []
 
     for task in text.splitlines():
         days, name = task.split(':')
@@ -207,20 +201,20 @@ def parse_tasks_file(text: str) -> list[tuple[list[str], str]]:
 
     return result
 
-def get_godword(journal: Journal) -> list[str]:
+def get_godword(journal):
     return journal['files']['godword'].strip().split('\n')
 
-def get_habits(journal: Journal) -> list[str]:
+def get_habits(journal):
     return journal['files']['habits'].strip().split('\n')
 
-def get_tasks(journal: Journal) -> list[tuple[list[str], str]]:
+def get_tasks(journal):
     return parse_tasks_file(journal['files']['tasks'])
 
 ### HACKY HACKERY
 
-_global_do_not_use: Journal = {}
+_global_do_not_use = {}
 
-def init_hacky_hackery(journal: Journal) -> None:
+def init_hacky_hackery(journal):
     global _global_do_not_use
     _global_do_not_use = journal
 
@@ -229,10 +223,8 @@ def get_foods_file():
 
 ### HEADER MODULES
 
-Notification = dict[str, Union[int, str]]
-
-def get_notifications_for_date(journal: Journal, date: str) -> list[Notification]:
-    notifications: list[Notification] = []
+def get_notifications_for_date(journal, date):
+    notifications = []
 
     for day in journal['days'].values():
         for entry in day.get('entries'):
@@ -246,20 +238,14 @@ def get_notifications_for_date(journal: Journal, date: str) -> list[Notification
 
     return notifications
 
-def get_yesterdays_sticky(journal: Journal, date: str) -> Optional[str]:
+def get_yesterdays_sticky(journal, date):
     yesterday = format_date(parse_date(date) - timedelta(days=1))
 
     if day := journal['days'].get(yesterday):
         if sticky := day['header'].get('sticky'):
             return sticky
 
-HeaderModule = tuple[
-    Callable[[Journal, str], Any],
-    Callable[[str], Any],
-    Callable[[Any], str],
-]
-
-header_modules: dict[str, HeaderModule] = {
+header_modules = {
     'godword': (
         lambda j, d: [random.choice(get_godword(j)) for _ in range(20)],
         lambda b: b.split(),
@@ -306,18 +292,18 @@ header_modules: dict[str, HeaderModule] = {
     )
 }
 
-def create_header_module(name: str, journal: Journal, date: str) -> AnyDict:
+def create_header_module(name, journal, date):
     return header_modules[name][0](journal, date)
 
-def parse_header_module(name: str, block: str) -> AnyDict:
+def parse_header_module(name, block):
     return header_modules[name][1](block)
 
-def generate_header_module(name: str, value: AnyDict) -> str:
+def generate_header_module(name, value):
     return header_modules[name][2](value)
 
 ### ENTRY MODULES
 
-def parse_timer(block: str) -> AnyDict:
+def parse_timer(block):
     rest = block.split()
 
     name = None
@@ -327,7 +313,7 @@ def parse_timer(block: str) -> AnyDict:
     if len(rest) > 1:
         timestamp = parse_timestamp(' '.join(rest))
 
-    result: AnyDict = {}
+    result = {}
 
     if name:
         result['name'] = name
@@ -336,8 +322,8 @@ def parse_timer(block: str) -> AnyDict:
 
     return result
 
-def generate_timer(value: AnyDict) -> str:
-    parts: list[str] = []
+def generate_timer(value):
+    parts = []
 
     if name := value.get('name'):
         parts.append(name)
@@ -347,7 +333,7 @@ def generate_timer(value: AnyDict) -> str:
 
     return ' '.join(parts)
 
-def parse_exercise(block: str) -> AnyDict:
+def parse_exercise(block):
     parts = block.split()
 
     if parts[0] == 'walk':
@@ -371,7 +357,7 @@ def parse_exercise(block: str) -> AnyDict:
 
     assert False
 
-def generate_exercise(value: AnyDict) -> str:
+def generate_exercise(value):
     if value['kind'] == 'walk':
         return f'walk {value["minutes"]}min {value["distance"]}km {value["steps"]}steps'
     elif value['kind'] == 'calisthenics':
@@ -379,10 +365,10 @@ def generate_exercise(value: AnyDict) -> str:
 
     assert False
 
-DEFAULT_PARSER: AnyCallable = lambda b: {'value': b}
-DEFAULT_GENERATOR: AnyCallable = lambda b: b['value']
+DEFAULT_PARSER = lambda b: {'value': b}
+DEFAULT_GENERATOR = lambda b: b['value']
 
-entry_modules: dict[str, tuple[Callable[[str], AnyDict], Callable[[AnyDict], str]]] = {
+entry_modules = {
     'diet': (
         lambda b: {'amount': int(b.split()[0].removesuffix('g')), 'food': b.split()[1].strip()},
         lambda v: f'{v["amount"]}g {v["food"]}'),
@@ -416,15 +402,20 @@ entry_modules: dict[str, tuple[Callable[[str], AnyDict], Callable[[AnyDict], str
         ),
         lambda v: f'{v["day"]} {v["message"]}'
     ),
+
+    'tag': (
+        lambda b: {'value': b.split(',')},
+        lambda v: ','.join(v['value'])
+    )
 }
 
-def parse_entry_module(block: str) -> AnyDict:
+def parse_entry_module(block):
     tag = block.split()[0].removeprefix('@')
     block = block.removeprefix(f'@{tag}').strip()
 
     return {'type': tag} | entry_modules[tag][0](block)
 
-def generate_entry_module(block: AnyDict) -> str:
+def generate_entry_module(block):
     if block['type'] == 'notes':
         return f'@notes\n{entry_modules[block["type"]][1](block)}'
 
@@ -432,7 +423,7 @@ def generate_entry_module(block: AnyDict) -> str:
 
 ### READ-ONLY STATS SECTION FUNCTIONS
 
-def generate_stats(page: AnyDict) -> str:
+def generate_stats(page):
     if not page['entries']:
         return ''
     
@@ -493,32 +484,32 @@ def generate_stats(page: AnyDict) -> str:
 
 ### PAGE FUNCTIONS
 
-def create_header(journal: Journal, date: str) -> AnyDict:
+def create_header(journal, date):
     return {
         module: create_header_module(module, journal, date)
         for module in header_modules
     }
 
-def create_entry(journal: Journal, date: str) -> AnyDict:
+def create_entry(journal, date):
     return {
         'timestamp': int(today().timestamp()),
         'blocks': []
     }
 
-def create_day(journal: Journal, date: str) -> AnyDict:
+def create_day(journal, date):
     return {
         'title': date,
         'header': create_header(journal, date),
         'entries': []
     }
 
-def parse_header(text: str) -> AnyDict:
-    def split_into_blocks(text: str) -> list[str]:
+def parse_header(text):
+    def split_into_blocks(text):
         return [b.strip() for b in re.split(r'\n{2,}', text) if b.strip() != '']
 
     modules = split_into_blocks(text)
 
-    result: AnyDict = {}
+    result = {}
 
     for module in modules:
         name, block = module.split('\n', maxsplit=1)
@@ -527,7 +518,7 @@ def parse_header(text: str) -> AnyDict:
     
     return result
 
-def generate_header(header: AnyDict) -> str:
+def generate_header(header):
     result = ''
 
     for name, header in header.items():
@@ -539,9 +530,9 @@ def generate_header(header: AnyDict) -> str:
     
     return result
 
-def parse_entry(timestamp: str, content: str) -> AnyDict:
-    def merge_notes_block(l: list[str]) -> list[str]:
-        res: list[str] = []
+def parse_entry(timestamp, content):
+    def merge_notes_block(l):
+        res = []
 
         i = 0
         while i < len(l):
@@ -555,12 +546,12 @@ def parse_entry(timestamp: str, content: str) -> AnyDict:
 
         return res
 
-    def merge_wrapped_lines(l: list[str]) -> list[str]:
+    def merge_wrapped_lines(l):
         TIMESTAMP_LENGTH = len('2020-02-02 02:02:02 ')
         POST_BLOCK_LENGTH = len('@post 2020-02-02 02:02:02 ')
         COLUMN_LIMIT = 80
 
-        res: list[str] = []
+        res = []
 
         i = 0
         while i < len(l):
@@ -597,8 +588,8 @@ def parse_entry(timestamp: str, content: str) -> AnyDict:
 
         return res
 
-    def split_post_block(l: list[str]) -> list[str]:
-        res: list[str] = []
+    def split_post_block(l):
+        res = []
 
         POST_BLOCK_LENGTH = len('@post 2020-02-02 02:02:02')
 
@@ -651,12 +642,12 @@ def parse_entry(timestamp: str, content: str) -> AnyDict:
 
     return {
         'timestamp': parse_timestamp(timestamp.strip()),
-        'blocks': [parse_entry_module(b) if b.startswith('@') else b for b in split_into_blocks(content)],
+        'blocks': [(parse_entry_module(b) if b.startswith('@') else b) for b in split_into_blocks(content)],
     }
 
-def generate_entry(entry: AnyDict) -> str:
+def generate_entry(entry):
     def format_block(curr: Any, prev: Any, before_prev: Any):
-        def format_text(text: str) -> str:
+        def format_text(text):
             if all(c == '\n' for c in curr):
                 return text
 
@@ -664,7 +655,7 @@ def generate_entry(entry: AnyDict) -> str:
             DUMMY_POST = '@post 2020-02-02 02:02:02 '
 
             is_first = not prev
-            is_post: bool = (before_prev and all(c == '\n' for c in before_prev) and isinstance(prev, dict) and prev['type'] == 'post')
+            is_post = (before_prev and all(c == '\n' for c in before_prev) and isinstance(prev, dict) and prev['type'] == 'post')
 
             if is_first:
                 text = DUMMY_TS + text
@@ -706,7 +697,7 @@ def generate_entry(entry: AnyDict) -> str:
     
     return result
 
-def parse_day(text: str) -> AnyDict:
+def parse_day(text):
     # discard read-only QS section
     text = text[text.find('#'):]
 
@@ -725,7 +716,7 @@ def parse_day(text: str) -> AnyDict:
         'entries': [parse_entry(timestamp, content) for timestamp, content in entries],
     }
 
-def generate_day(day: AnyDict) -> str:
+def generate_day(day):
     result = ''
 
     result += generate_stats(day)
@@ -743,13 +734,13 @@ def generate_day(day: AnyDict) -> str:
 
 ### COMMAND UTILS
 
-def load_journal() -> Journal:
+def load_journal():
     return json.loads(JOURNAL_PATH.read_text())
 
-def save_journal(journal: Journal) -> None:
+def save_journal(journal):
     JOURNAL_PATH.write_text(json.dumps(journal))
 
-def import_journal(fpath: Path) -> Journal:
+def import_journal(fpath):
     return {
         'days': {
             fname.stem: parse_day(fname.read_text())
@@ -761,14 +752,14 @@ def import_journal(fpath: Path) -> Journal:
         }
     }
 
-def export_journal(journal: Journal, fpath: Path) -> None:
+def export_journal(journal, fpath):
     for day in journal['days'].values():
         (fpath / (day['title'] + '.md')).write_text(generate_day(day))
     
     for fname, content in journal['files'].items():
         (fpath / fname).write_text(content)
     
-def backup_journal(journal: Journal) -> Path:
+def backup_journal(journal):
     print('Creating backup...')
 
     tmpdir = Path(mkdtemp())
@@ -795,7 +786,7 @@ def backup_journal(journal: Journal) -> Path:
     
     return zipfile_path
 
-def open_journal(journal: Journal, date: str) -> Journal:
+def open_journal(journal, date):
     if not journal['days'].get(date):
         backup_journal(journal)
         journal['days'][date] = create_day(journal, date)
@@ -816,7 +807,7 @@ def open_journal(journal: Journal, date: str) -> Journal:
 
 ### COMMAND HANDLERS
 
-def handle_open(args: list[str]) -> None:
+def handle_open(args):
     subcommand = nth_or_default(0, args, 'today')
 
     if date := evaluate_time_expression(subcommand):
@@ -824,7 +815,7 @@ def handle_open(args: list[str]) -> None:
     else:
         print(f'Invalid subcommand: {subcommand}')
 
-def handle_edit(args: list[str]) -> None:
+def handle_edit(args):
     subcommand = nth_or_default(0, args, 'foods')
 
     journal = load_journal()
@@ -836,7 +827,7 @@ def handle_edit(args: list[str]) -> None:
 
     save_journal(journal)
 
-def handle_import(args: list[str]) -> None:
+def handle_import(args):
     if len(args) < 1:
         print('Missing directory.')
         return
@@ -849,7 +840,7 @@ def handle_import(args: list[str]) -> None:
 
     save_journal(import_journal(path))
 
-def handle_export(args: list[str]) -> None:
+def handle_export(args):
     if len(args) < 1:
         print('Missing directory.')
         return
@@ -862,7 +853,7 @@ def handle_export(args: list[str]) -> None:
     
     export_journal(load_journal(), path)
 
-def handle_test(args: list[str]) -> None:
+def handle_test(args):
     journal = load_journal()
 
     journal_orig = deepcopy(journal)
@@ -879,11 +870,11 @@ def handle_test(args: list[str]) -> None:
     else:
         print('Test passed!')
 
-def handle_summary(args: list[str]) -> None:
-    def generate_food_summary(day: AnyDict) -> str:
+def handle_summary(args):
+    def generate_food_summary(day):
         result = ''
 
-        def print(str:str=''):
+        def print(str=''):
             nonlocal result
             result += '\n' + str
         
@@ -954,24 +945,23 @@ def handle_summary(args: list[str]) -> None:
 
     print(generate_food_summary(journal['days'][date]))
 
-def handle_backup(args: list[str]) -> None:
+def handle_backup(args):
     archive_path = backup_journal(load_journal())
     if prompt('Delete backup archive?'):
         archive_path.unlink()
 
-
 ### MAIN
 
-def main() -> None:
+def main():
     init_hacky_hackery(load_journal())
 
     command = nth_or_default(1, sys.argv, 'open')
     args = sys.argv[2:]
 
-    def handle_invalid(args: list[str]) -> None:
+    def handle_invalid(args):
         print(f'Invalid command: {command}')
 
-    command_handlers: dict[str, Callable[[list[str]], None]] = {
+    command_handlers = {
         'open': handle_open,
         'edit': handle_edit,
         'import': handle_import,
diff --git a/migrations/2021-06-29_tag.py b/migrations/2021-06-29_tag.py
new file mode 100644
index 0000000..68c7ad1
--- /dev/null
+++ b/migrations/2021-06-29_tag.py
@@ -0,0 +1,34 @@
+from copy import deepcopy
+from pathlib import Path
+from shutil import copy
+import json
+
+journal_path = Path.home() / '.journal.json'
+
+copy(str(journal_path), str(journal_path.with_suffix('.bkp')))
+
+journal = json.loads(journal_path.read_text())
+new_journal = deepcopy(journal)
+
+for day in journal['days']:
+    new_entries = []
+    for entry in journal['days'][day]['entries']:
+        new_blocks = []
+        for block in entry['blocks']:
+            if not isinstance(block, str) and block['type'] == 'hide':
+                if len(new_blocks) and not isinstance(new_blocks[-1], str) and \
+                    new_blocks[-1]['type'] != 'tag':
+                    new_blocks.append({'type': 'tag', 'value': ['hide']})
+            elif not isinstance(block, str) and block['type'] == 'info':
+                new_blocks.append({'type': 'tag', 'value': ['info']})
+                new_blocks.append('\n')
+                new_blocks.append(block['value'])
+            else:
+                new_blocks.append(block)
+        
+        entry['blocks'] = new_blocks
+        new_entries.append(entry)
+        
+    new_journal['days'][day]['entries'] = new_entries
+
+journal_path.write_text(json.dumps(new_journal))