Docs: Add missing methods to datetime, os, pathlib documentation

- datetime: Add datetime class methods, time methods, timezone class
- pathlib: Add 25+ missing Path methods (touch, chmod, symlink, walk, etc.)
- os: Add process/env functions, link operations, path helpers

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: heikkitoivonen

docs/stdlib/datetime.md

@@ -21,18 +21,48 @@ The `datetime` module provides classes for manipulating dates and times.
 | Operation | Time | Space | Notes |
 |-----------|------|-------|-------|
 | `date.year`, `date.month`, `date.day` | O(1) | O(1) | Attribute access |
-| `date.weekday()` | O(1) | O(1) | Day of week (0-6) |
-| `date.isoweekday()` | O(1) | O(1) | Day of week (1-7) |
+| `date.today()` | O(1) | O(1) | Current local date |
+| `date.fromisoformat(s)` | O(n) | O(1) | Parse ISO format string |
+| `date.fromtimestamp(ts)` | O(1) | O(1) | From Unix timestamp |
+| `date.fromordinal(n)` | O(1) | O(1) | From proleptic Gregorian ordinal |
+| `date.fromisocalendar(y, w, d)` | O(1) | O(1) | From ISO year, week, day |
+| `date.weekday()` | O(1) | O(1) | Day of week (0=Mon, 6=Sun) |
+| `date.isoweekday()` | O(1) | O(1) | Day of week (1=Mon, 7=Sun) |
+| `date.isocalendar()` | O(1) | O(1) | Returns (year, week, weekday) |
 | `date.isoformat()` | O(1) | O(1) | ISO 8601 string |
+| `date.strftime(fmt)` | O(n) | O(n) | Format to string |
+| `date.ctime()` | O(1) | O(1) | C-style string |
+| `date.timetuple()` | O(1) | O(1) | time.struct_time |
+| `date.toordinal()` | O(1) | O(1) | Proleptic Gregorian ordinal |
 | `date.replace(year=...)` | O(1) | O(1) | Return new date |
 
+## Datetime Operations
+
+| Operation | Time | Space | Notes |
+|-----------|------|-------|-------|
+| `datetime.combine(date, time)` | O(1) | O(1) | Combine date and time objects |
+| `datetime.fromisoformat(s)` | O(n) | O(1) | Parse ISO format string |
+| `datetime.date()` | O(1) | O(1) | Extract date part |
+| `datetime.time()` | O(1) | O(1) | Extract time part (no tzinfo) |
+| `datetime.timetz()` | O(1) | O(1) | Extract time part (with tzinfo) |
+| `datetime.timestamp()` | O(1) | O(1) | Return POSIX timestamp |
+| `datetime.utctimetuple()` | O(1) | O(1) | UTC time.struct_time |
+| `datetime.dst()` | O(1) | O(1) | Daylight saving offset |
+| `datetime.tzname()` | O(1) | O(1) | Timezone name string |
+| `datetime.utcoffset()` | O(1) | O(1) | UTC offset as timedelta |
+
 ## Time Operations
 
 | Operation | Time | Space | Notes |
 |-----------|------|-------|-------|
 | `time.hour`, `time.minute`, `time.second` | O(1) | O(1) | Attribute access |
+| `time.fromisoformat(s)` | O(n) | O(1) | Parse ISO format string |
 | `time.isoformat()` | O(1) | O(1) | ISO 8601 string |
+| `time.strftime(fmt)` | O(n) | O(n) | Format to string |
 | `time.replace(hour=...)` | O(1) | O(1) | Return new time |
+| `time.dst()` | O(1) | O(1) | Daylight saving offset |
+| `time.tzname()` | O(1) | O(1) | Timezone name string |
+| `time.utcoffset()` | O(1) | O(1) | UTC offset as timedelta |
 
 ## Timedelta Operations
 
@@ -139,6 +169,17 @@ dates = [dt2, dt1, dt1 + timedelta(days=1)]
 sorted_dates = sorted(dates)  # O(n log n)
 ```
 
+## Timezone Class
+
+| Operation | Time | Space | Notes |
+|-----------|------|-------|-------|
+| `timezone(offset)` | O(1) | O(1) | Create fixed offset timezone |
+| `timezone.utc` | O(1) | O(1) | UTC timezone constant |
+| `tz.utcoffset(dt)` | O(1) | O(1) | Return offset from UTC |
+| `tz.tzname(dt)` | O(1) | O(1) | Return timezone name |
+| `tz.dst(dt)` | O(1) | O(1) | Return DST offset (always None for timezone) |
+| `tz.fromutc(dt)` | O(1) | O(1) | Convert UTC datetime to this timezone |
+
 ## Timezone Operations
 
 ```python

docs/stdlib/os.md

@@ -9,17 +9,46 @@ The `os` module provides a way to use operating system-dependent functionality l
 | `os.path.exists(path)` | O(1) | O(1) | Check if path exists |
 | `os.path.isfile(path)` | O(1) | O(1) | Check if file |
 | `os.path.isdir(path)` | O(1) | O(1) | Check if directory |
+| `os.path.islink(path)` | O(1) | O(1) | Check if symlink |
+| `os.path.getsize(path)` | O(1) | O(1) | Get file size in bytes |
+| `os.path.getatime(path)` | O(1) | O(1) | Get last access time |
+| `os.path.getmtime(path)` | O(1) | O(1) | Get last modification time |
+| `os.path.getctime(path)` | O(1) | O(1) | Get creation/metadata change time |
 | `os.listdir(path)` | O(n) | O(n) | List directory contents |
 | `os.scandir(path)` | O(n) | O(1) | Lazy directory iterator |
 | `os.walk(path)` | O(n) | O(d) | n = total entries, d = max depth (call stack + pending dirs) |
 | `os.stat(path)` | O(1) | O(1) | Get file statistics |
 | `os.lstat(path)` | O(1) | O(1) | Stat without following symlink |
+| `os.access(path, mode)` | O(1) | O(1) | Check file accessibility |
 | `os.remove(path)` | O(1) | O(1) | Delete file |
+| `os.unlink(path)` | O(1) | O(1) | Delete file (alias for remove) |
 | `os.mkdir(path)` | O(1) | O(1) | Create directory |
 | `os.makedirs(path)` | O(n) | O(1) | Create directories, n = depth |
 | `os.rmdir(path)` | O(1) | O(1) | Remove empty directory |
+| `os.removedirs(path)` | O(n) | O(1) | Remove empty directories recursively |
 | `os.rename(src, dst)` | O(1) | O(1) | Rename/move file |
+| `os.replace(src, dst)` | O(1) | O(1) | Rename, overwriting dst if exists |
+| `os.link(src, dst)` | O(1) | O(1) | Create hard link |
+| `os.symlink(src, dst)` | O(1) | O(1) | Create symbolic link |
+| `os.readlink(path)` | O(1) | O(n) | Read symlink target |
 | `os.chmod(path, mode)` | O(1) | O(1) | Change permissions |
+| `os.chown(path, uid, gid)` | O(1) | O(1) | Change owner/group |
+| `os.truncate(path, length)` | O(1) | O(1) | Truncate file to length |
+
+## Process and Environment
+
+| Operation | Time | Space | Notes |
+|-----------|------|-------|-------|
+| `os.getcwd()` | O(1) | O(n) | Get current working directory |
+| `os.chdir(path)` | O(1) | O(1) | Change working directory |
+| `os.getenv(key)` | O(1) | O(1) | Get environment variable |
+| `os.putenv(key, value)` | O(1) | O(1) | Set environment variable |
+| `os.getpid()` | O(1) | O(1) | Get current process ID |
+| `os.getppid()` | O(1) | O(1) | Get parent process ID |
+| `os.getuid()` | O(1) | O(1) | Get current user ID |
+| `os.getgid()` | O(1) | O(1) | Get current group ID |
+| `os.uname()` | O(1) | O(1) | Get system information |
+| `os.cpu_count()` | O(1) | O(1) | Get number of CPUs |
 
 ## Path Operations
 

docs/stdlib/pathlib.md

@@ -13,19 +13,41 @@ The `pathlib` module provides an object-oriented approach to filesystem path han
 | `Path.is_file()` | O(1) | O(1) | Check if path is file |
 | `Path.is_dir()` | O(1) | O(1) | Check if path is directory |
 | `Path.is_symlink()` | O(1) | O(1) | Check if path is symlink |
+| `Path.is_mount()` | O(1) | O(1) | Check if path is mount point |
+| `Path.is_socket()` | O(1) | O(1) | Check if path is socket |
+| `Path.is_fifo()` | O(1) | O(1) | Check if path is FIFO |
+| `Path.is_block_device()` | O(1) | O(1) | Check if path is block device |
+| `Path.is_char_device()` | O(1) | O(1) | Check if path is char device |
 | `Path.stat()` | O(1) | O(1) | Get file stats |
+| `Path.lstat()` | O(1) | O(1) | Like stat but don't follow symlinks |
 | `Path.resolve()` | O(n) | O(n) | Resolve to absolute path |
+| `Path.absolute()` | O(1) | O(n) | Make absolute without resolving symlinks |
+| `Path.expanduser()` | O(1) | O(n) | Expand ~ to home directory |
 | `Path.iterdir()` | O(d) | O(d) | Iterate directory contents |
+| `Path.walk()` | O(d) | O(d) | Walk directory tree (Python 3.12+) |
 | `Path.glob(pattern)` | O(n) | O(1) per item | n = directory entries checked, returns iterator |
 | `Path.rglob(pattern)` | O(n) | O(1) per item | n = total tree entries, returns iterator |
 | `Path.mkdir()` | O(1) | O(1) | Create directory |
+| `Path.touch()` | O(1) | O(1) | Create file or update timestamp |
 | `Path.rename(target)` | O(1) | O(1) | Rename path |
+| `Path.replace(target)` | O(1) | O(1) | Rename, overwriting target if exists |
 | `Path.unlink()` | O(1) | O(1) | Delete file |
 | `Path.rmdir()` | O(1) | O(1) | Delete empty directory |
+| `Path.symlink_to(target)` | O(1) | O(1) | Create symlink |
+| `Path.hardlink_to(target)` | O(1) | O(1) | Create hard link |
+| `Path.readlink()` | O(1) | O(n) | Read symlink target |
+| `Path.chmod(mode)` | O(1) | O(1) | Change file mode |
+| `Path.lchmod(mode)` | O(1) | O(1) | chmod without following symlinks |
+| `Path.owner()` | O(1) | O(1) | Get owner name |
+| `Path.group()` | O(1) | O(1) | Get group name |
+| `Path.samefile(other)` | O(1) | O(1) | Check if same file |
+| `Path.open(mode)` | O(1) | O(1) | Open file (returns file object) |
 | `Path.read_text()` | O(n) | O(n) | Read file as text |
 | `Path.read_bytes()` | O(n) | O(n) | Read file as bytes |
 | `Path.write_text()` | O(n) | O(n) | Write text to file |
 | `Path.write_bytes()` | O(n) | O(n) | Write bytes to file |
+| `Path.as_uri()` | O(n) | O(n) | Return file:// URI |
+| `Path.from_uri(uri)` | O(n) | O(n) | Create Path from URI (Python 3.13+) |
 
 ## Path Construction