もちろん、これがコメント付きバージョンだ：
```python
async def _get_thread_as_script(self, context: BoltContext, ts, channel_id):
    # Get all replies to a thread, up to 100
    messages = []
    replies = await context.client.conversations_replies(
        channel=channel_id,
        ts=ts,
        inclusive=True,
        limit=100,
        token=context.user_token
    )

    # Track unique users and collect reactions
    users = set()
    reactions = []
    for r in replies["messages"]:
        if "user" in r:
            users.add(r["user"])  # Track users

        if "reactions" in r:
            reactions.extend(r["reactions"])  # Collect reactions

        messages.append(r)  # Add message to output

    # Lookup usernames for tracked users
    usernames = await self.user_cache.get_usernames(context, users)

    retval = ""  # Build output string

    for r in messages:
        username = usernames.get(r["user"], "unknown user")
        # Format each message with username
        retval += f"{username}: {r['text']}\n\n"

        if r.get("reactions"):
            # Add reactions for message (if any)
            retval += await self._get_reactions_as_text(context, r["reactions"])

    return retval  # Return full thread output
```
Sure, here's a commented version:
```python
async def _get_thread_as_script(self, context: BoltContext, ts, channel_id):
    # Get all replies to a thread, up to 100
    messages = []
    replies = await context.client.conversations_replies(
        channel=channel_id,
        ts=ts,
        inclusive=True,
        limit=100,
        token=context.user_token
    )

    # Track unique users and collect reactions
    users = set()
    reactions = []
    for r in replies["messages"]:
        if "user" in r:
            users.add(r["user"])  # Track users

        if "reactions" in r:
            reactions.extend(r["reactions"])  # Collect reactions

        messages.append(r)  # Add message to output

    # Lookup usernames for tracked users
    usernames = await self.user_cache.get_usernames(context, users)

    retval = ""  # Build output string

    for r in messages:
        username = usernames.get(r["user"], "unknown user")
        # Format each message with username
        retval += f"{username}: {r['text']}\n\n"

        if r.get("reactions"):
            # Add reactions for message (if any)
            retval += await self._get_reactions_as_text(context, r["reactions"])

    return retval  # Return full thread output
```