From a4f395cd956e6f90ec66b927830a145f6735af67 Mon Sep 17 00:00:00 2001
From: Joe Banks <joe@jb3.dev>
Date: Sun, 9 Nov 2025 22:12:05 +0000
Subject: [PATCH 01/16] Provide a pre-built SourceCode cog based on bot version

---
 pydis_core/exts/__init__.py |   4 +-
 pydis_core/exts/source.py   | 166 ++++++++++++++++++++++++++++++++++++
 2 files changed, 169 insertions(+), 1 deletion(-)
 create mode 100644 pydis_core/exts/source.py

diff --git a/pydis_core/exts/__init__.py b/pydis_core/exts/__init__.py
index 9d59e8ad5..b2d2fa2f8 100644
--- a/pydis_core/exts/__init__.py
+++ b/pydis_core/exts/__init__.py
@@ -1,4 +1,6 @@
 """Reusable Discord cogs."""
-__all__ = []
+from .source import SourceCode
+
+__all__ = [SourceCode]
 
 __all__ = [module.__name__ for module in __all__]
diff --git a/pydis_core/exts/source.py b/pydis_core/exts/source.py
new file mode 100644
index 000000000..d17940c3b
--- /dev/null
+++ b/pydis_core/exts/source.py
@@ -0,0 +1,166 @@
+import enum
+import inspect
+from pathlib import Path
+from typing import NamedTuple, TYPE_CHECKING
+
+from discord import Embed
+from discord.ext import commands
+from discord.utils import escape_markdown
+
+if TYPE_CHECKING:
+    from pydis_core import BotBase as Bot
+
+
+class TagIdentifierStub(NamedTuple):
+    """A minmally functioning stub representing a tag identifier."""
+
+    group: str | None
+    name: str
+
+    @classmethod
+    def from_string(cls, string: str) -> "TagIdentifierStub":
+        """Create a TagIdentifierStub from a string."""
+        split_string = string.split(" ", maxsplit=2)
+        if len(split_string) == 1:
+            return cls(None, split_string[0])
+        return cls(split_string[0], split_string[1])
+
+
+class SourceType(enum.StrEnum):
+    """The types of source objects recognized by the source command."""
+
+    help_command = enum.auto()
+    command = enum.auto()
+    cog = enum.auto()
+    tag = enum.auto()
+    extension_not_loaded = enum.auto()
+
+
+class SourceCode(commands.Cog, description="Displays information about the bot's source code."):
+    """
+    Pre-built cog to display source code links for commands and cogs (and if applicable, tags).
+
+    To use this cog, instantiate it with the bot instance and the base GitHub repository URL.
+
+    Args:
+        bot (:obj:`pydis_core.BotBase`): The bot instance.
+        github_repo: The base URL to the GitHub repository (e.g. `https://github.com/python-discord/bot`).
+    """
+
+    def __init__(self, bot: "Bot", github_repo: str) -> None:
+        self.bot = bot
+        self.github_repo = github_repo
+
+    @commands.command(name="source", aliases=("src",))
+    async def source_command(
+        self,
+        ctx: commands.Context,
+        *,
+        source_item: str | None = None,
+    ) -> None:
+        """Display information and a GitHub link to the source code of a command, tag, or cog."""
+        if not source_item:
+            embed = Embed(title=f"{self.bot.user.name}'s GitHub Repository")
+            embed.add_field(name="Repository", value=f"[Go to GitHub]({self.github_repo})")
+            embed.set_thumbnail(url="https://avatars1.githubusercontent.com/u/9919")
+            await ctx.send(embed=embed)
+            return
+
+        obj, source_type = await self._get_source_object(ctx, source_item)
+        embed = await self._build_embed(obj, source_type)
+        await ctx.send(embed=embed)
+
+    @staticmethod
+    async def _get_source_object(ctx: commands.Context, argument: str) -> tuple[object, SourceType]:
+        """Convert argument into the source object and source type."""
+        if argument.lower() == "help":
+            return ctx.bot.help_command, SourceType.help_command
+
+        cog = ctx.bot.get_cog(argument)
+        if cog:
+            return cog, SourceType.cog
+
+        cmd = ctx.bot.get_command(argument)
+        if cmd:
+            return cmd, SourceType.command
+
+        tags_cog = ctx.bot.get_cog("Tags")
+        show_tag = True
+
+        if not tags_cog:
+            show_tag = False
+        else:
+            identifier = TagIdentifierStub.from_string(argument.lower())
+            if identifier in tags_cog.tags:
+                return identifier, SourceType.tag
+
+        escaped_arg = escape_markdown(argument)
+
+        raise commands.BadArgument(
+            f"Unable to convert '{escaped_arg}' to valid command{', tag,' if show_tag else ''} or Cog."
+        )
+
+    def _get_source_link(self, source_item: object, source_type: SourceType) -> tuple[str, str, int | None]:
+        """
+        Build GitHub link of source item, return this link, file location and first line number.
+
+        Raise BadArgument if `source_item` is a dynamically-created object (e.g. via internal eval).
+        """
+        if source_type == SourceType.command:
+            source_item = inspect.unwrap(source_item.callback)
+            src = source_item.__code__
+            filename = src.co_filename
+        elif source_type == SourceType.tag:
+            tags_cog = self.bot.get_cog("Tags")
+            filename = tags_cog.tags[source_item].file_path
+        else:
+            src = type(source_item)
+            try:
+                filename = inspect.getsourcefile(src)
+            except TypeError:
+                raise commands.BadArgument("Cannot get source for a dynamically-created object.")
+
+        if source_type != SourceType.tag:
+            try:
+                lines, first_line_no = inspect.getsourcelines(src)
+            except OSError:
+                raise commands.BadArgument("Cannot get source for a dynamically-created object.")
+
+            lines_extension = f"#L{first_line_no}-L{first_line_no+len(lines)-1}"
+        else:
+            first_line_no = None
+            lines_extension = ""
+
+        # Handle tag file location differently than others to avoid errors in some cases
+        if not first_line_no:
+            file_location = Path(filename)
+        else:
+            file_location = Path(filename).relative_to(Path.cwd()).as_posix()
+
+        url = f"{self.github_repo}/blob/main/{file_location}{lines_extension}"
+
+        return url, file_location, first_line_no or None
+
+    async def _build_embed(self, source_object: object, source_type: SourceType) -> Embed | None:
+        """Build embed based on source object."""
+        url, location, first_line = self._get_source_link(source_object, source_type)
+
+        if source_type == SourceType.help_command:
+            title = "Help Command"
+            description = source_object.__doc__.splitlines()[1]
+        elif source_type == SourceType.command:
+            description = source_object.short_doc
+            title = f"Command: {source_object.qualified_name}"
+        elif source_type == SourceType.tag:
+            title = f"Tag: {source_object}"
+            description = ""
+        else:
+            title = f"Cog: {source_object.qualified_name}"
+            description = source_object.description.splitlines()[0]
+
+        embed = Embed(title=title, description=description)
+        embed.add_field(name="Source Code", value=f"[Go to GitHub]({url})")
+        line_text = f":{first_line}" if first_line else ""
+        embed.set_footer(text=f"{location}{line_text}")
+
+        return embed

From 643b3b783ba59ac5dcbc24a4f6303c0244e4d19f Mon Sep 17 00:00:00 2001
From: Joe Banks <joe@jb3.dev>
Date: Sun, 9 Nov 2025 22:25:57 +0000
Subject: [PATCH 02/16] Update source code modules so documentation can build

---
 pydis_core/exts/__init__.py |  6 ++++--
 pydis_core/exts/source.py   | 35 ++++++++++++++++++-----------------
 2 files changed, 22 insertions(+), 19 deletions(-)

diff --git a/pydis_core/exts/__init__.py b/pydis_core/exts/__init__.py
index b2d2fa2f8..d853b0ff1 100644
--- a/pydis_core/exts/__init__.py
+++ b/pydis_core/exts/__init__.py
@@ -1,6 +1,8 @@
 """Reusable Discord cogs."""
-from .source import SourceCode
+from pydis_core.exts import source
 
-__all__ = [SourceCode]
+__all__ = [
+    source,
+]
 
 __all__ = [module.__name__ for module in __all__]
diff --git a/pydis_core/exts/source.py b/pydis_core/exts/source.py
index d17940c3b..b6f6561ff 100644
--- a/pydis_core/exts/source.py
+++ b/pydis_core/exts/source.py
@@ -1,3 +1,4 @@
+"""Pre-built cog to display source code links for commands and cogs."""
 import enum
 import inspect
 from pathlib import Path
@@ -11,14 +12,14 @@
     from pydis_core import BotBase as Bot
 
 
-class TagIdentifierStub(NamedTuple):
+class _TagIdentifierStub(NamedTuple):
     """A minmally functioning stub representing a tag identifier."""
 
     group: str | None
     name: str
 
     @classmethod
-    def from_string(cls, string: str) -> "TagIdentifierStub":
+    def from_string(cls, string: str) -> "_TagIdentifierStub":
         """Create a TagIdentifierStub from a string."""
         split_string = string.split(" ", maxsplit=2)
         if len(split_string) == 1:
@@ -26,7 +27,7 @@ def from_string(cls, string: str) -> "TagIdentifierStub":
         return cls(split_string[0], split_string[1])
 
 
-class SourceType(enum.StrEnum):
+class _SourceType(enum.StrEnum):
     """The types of source objects recognized by the source command."""
 
     help_command = enum.auto()
@@ -71,18 +72,18 @@ async def source_command(
         await ctx.send(embed=embed)
 
     @staticmethod
-    async def _get_source_object(ctx: commands.Context, argument: str) -> tuple[object, SourceType]:
+    async def _get_source_object(ctx: commands.Context, argument: str) -> tuple[object, _SourceType]:
         """Convert argument into the source object and source type."""
         if argument.lower() == "help":
-            return ctx.bot.help_command, SourceType.help_command
+            return ctx.bot.help_command, _SourceType.help_command
 
         cog = ctx.bot.get_cog(argument)
         if cog:
-            return cog, SourceType.cog
+            return cog, _SourceType.cog
 
         cmd = ctx.bot.get_command(argument)
         if cmd:
-            return cmd, SourceType.command
+            return cmd, _SourceType.command
 
         tags_cog = ctx.bot.get_cog("Tags")
         show_tag = True
@@ -90,9 +91,9 @@ async def _get_source_object(ctx: commands.Context, argument: str) -> tuple[obje
         if not tags_cog:
             show_tag = False
         else:
-            identifier = TagIdentifierStub.from_string(argument.lower())
+            identifier = _TagIdentifierStub.from_string(argument.lower())
             if identifier in tags_cog.tags:
-                return identifier, SourceType.tag
+                return identifier, _SourceType.tag
 
         escaped_arg = escape_markdown(argument)
 
@@ -100,17 +101,17 @@ async def _get_source_object(ctx: commands.Context, argument: str) -> tuple[obje
             f"Unable to convert '{escaped_arg}' to valid command{', tag,' if show_tag else ''} or Cog."
         )
 
-    def _get_source_link(self, source_item: object, source_type: SourceType) -> tuple[str, str, int | None]:
+    def _get_source_link(self, source_item: object, source_type: _SourceType) -> tuple[str, str, int | None]:
         """
         Build GitHub link of source item, return this link, file location and first line number.
 
         Raise BadArgument if `source_item` is a dynamically-created object (e.g. via internal eval).
         """
-        if source_type == SourceType.command:
+        if source_type == _SourceType.command:
             source_item = inspect.unwrap(source_item.callback)
             src = source_item.__code__
             filename = src.co_filename
-        elif source_type == SourceType.tag:
+        elif source_type == _SourceType.tag:
             tags_cog = self.bot.get_cog("Tags")
             filename = tags_cog.tags[source_item].file_path
         else:
@@ -120,7 +121,7 @@ def _get_source_link(self, source_item: object, source_type: SourceType) -> tupl
             except TypeError:
                 raise commands.BadArgument("Cannot get source for a dynamically-created object.")
 
-        if source_type != SourceType.tag:
+        if source_type != _SourceType.tag:
             try:
                 lines, first_line_no = inspect.getsourcelines(src)
             except OSError:
@@ -141,17 +142,17 @@ def _get_source_link(self, source_item: object, source_type: SourceType) -> tupl
 
         return url, file_location, first_line_no or None
 
-    async def _build_embed(self, source_object: object, source_type: SourceType) -> Embed | None:
+    async def _build_embed(self, source_object: object, source_type: _SourceType) -> Embed | None:
         """Build embed based on source object."""
         url, location, first_line = self._get_source_link(source_object, source_type)
 
-        if source_type == SourceType.help_command:
+        if source_type == _SourceType.help_command:
             title = "Help Command"
             description = source_object.__doc__.splitlines()[1]
-        elif source_type == SourceType.command:
+        elif source_type == _SourceType.command:
             description = source_object.short_doc
             title = f"Command: {source_object.qualified_name}"
-        elif source_type == SourceType.tag:
+        elif source_type == _SourceType.tag:
             title = f"Tag: {source_object}"
             description = ""
         else:

From 7d13d75a1445f3698ea3017b75427d985bc1394e Mon Sep 17 00:00:00 2001
From: Joe Banks <joe@jb3.dev>
Date: Sun, 9 Nov 2025 22:27:33 +0000
Subject: [PATCH 03/16] Move avatar to constant

---
 pydis_core/exts/source.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pydis_core/exts/source.py b/pydis_core/exts/source.py
index b6f6561ff..6766b5421 100644
--- a/pydis_core/exts/source.py
+++ b/pydis_core/exts/source.py
@@ -12,6 +12,8 @@
     from pydis_core import BotBase as Bot
 
 
+GITHUB_AVATAR = "https://avatars1.githubusercontent.com/u/9919"
+
 class _TagIdentifierStub(NamedTuple):
     """A minmally functioning stub representing a tag identifier."""
 
@@ -63,7 +65,7 @@ async def source_command(
         if not source_item:
             embed = Embed(title=f"{self.bot.user.name}'s GitHub Repository")
             embed.add_field(name="Repository", value=f"[Go to GitHub]({self.github_repo})")
-            embed.set_thumbnail(url="https://avatars1.githubusercontent.com/u/9919")
+            embed.set_thumbnail(url=GITHUB_AVATAR)
             await ctx.send(embed=embed)
             return
 

From 2ea5594b3c3272df5ffe6bd3e3ba4c8f5b5d4559 Mon Sep 17 00:00:00 2001
From: Joe Banks <joe@jb3.dev>
Date: Sun, 9 Nov 2025 22:40:50 +0000
Subject: [PATCH 04/16] Use typed context object

---
 pydis_core/exts/source.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pydis_core/exts/source.py b/pydis_core/exts/source.py
index 6766b5421..1edc610cd 100644
--- a/pydis_core/exts/source.py
+++ b/pydis_core/exts/source.py
@@ -57,7 +57,7 @@ def __init__(self, bot: "Bot", github_repo: str) -> None:
     @commands.command(name="source", aliases=("src",))
     async def source_command(
         self,
-        ctx: commands.Context,
+        ctx: "commands.Context[Bot]",
         *,
         source_item: str | None = None,
     ) -> None:
@@ -74,7 +74,7 @@ async def source_command(
         await ctx.send(embed=embed)
 
     @staticmethod
-    async def _get_source_object(ctx: commands.Context, argument: str) -> tuple[object, _SourceType]:
+    async def _get_source_object(ctx: "commands.Context[Bot]", argument: str) -> tuple[object, _SourceType]:
         """Convert argument into the source object and source type."""
         if argument.lower() == "help":
             return ctx.bot.help_command, _SourceType.help_command

From 28b7eb63dfa8e0a7d58058aad35fe6c404bc4432 Mon Sep 17 00:00:00 2001
From: Joe Banks <joe@jb3.dev>
Date: Sun, 9 Nov 2025 22:40:59 +0000
Subject: [PATCH 05/16] SourceType command -> text_command

---
 pydis_core/exts/source.py | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/pydis_core/exts/source.py b/pydis_core/exts/source.py
index 1edc610cd..8689ceb36 100644
--- a/pydis_core/exts/source.py
+++ b/pydis_core/exts/source.py
@@ -33,7 +33,7 @@ class _SourceType(enum.StrEnum):
     """The types of source objects recognized by the source command."""
 
     help_command = enum.auto()
-    command = enum.auto()
+    text_command = enum.auto()
     cog = enum.auto()
     tag = enum.auto()
     extension_not_loaded = enum.auto()
@@ -85,7 +85,7 @@ async def _get_source_object(ctx: "commands.Context[Bot]", argument: str) -> tup
 
         cmd = ctx.bot.get_command(argument)
         if cmd:
-            return cmd, _SourceType.command
+            return cmd, _SourceType.text_command
 
         tags_cog = ctx.bot.get_cog("Tags")
         show_tag = True
@@ -109,7 +109,7 @@ def _get_source_link(self, source_item: object, source_type: _SourceType) -> tup
 
         Raise BadArgument if `source_item` is a dynamically-created object (e.g. via internal eval).
         """
-        if source_type == _SourceType.command:
+        if source_type == _SourceType.text_command:
             source_item = inspect.unwrap(source_item.callback)
             src = source_item.__code__
             filename = src.co_filename
@@ -151,7 +151,7 @@ async def _build_embed(self, source_object: object, source_type: _SourceType) ->
         if source_type == _SourceType.help_command:
             title = "Help Command"
             description = source_object.__doc__.splitlines()[1]
-        elif source_type == _SourceType.command:
+        elif source_type == _SourceType.text_command:
             description = source_object.short_doc
             title = f"Command: {source_object.qualified_name}"
         elif source_type == _SourceType.tag:

From 49cc8dd6cf4ea84186fe83a404ee41a103f7aae4 Mon Sep 17 00:00:00 2001
From: Joe Banks <joe@jb3.dev>
Date: Sun, 9 Nov 2025 22:43:05 +0000
Subject: [PATCH 06/16] Add github icon to source footer

---
 pydis_core/exts/source.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pydis_core/exts/source.py b/pydis_core/exts/source.py
index 8689ceb36..a7525269f 100644
--- a/pydis_core/exts/source.py
+++ b/pydis_core/exts/source.py
@@ -164,6 +164,6 @@ async def _build_embed(self, source_object: object, source_type: _SourceType) ->
         embed = Embed(title=title, description=description)
         embed.add_field(name="Source Code", value=f"[Go to GitHub]({url})")
         line_text = f":{first_line}" if first_line else ""
-        embed.set_footer(text=f"{location}{line_text}")
+        embed.set_footer(text=f"{location}{line_text}", icon_url=GITHUB_AVATAR)
 
         return embed

From 8410c1f0f75cb93668498852966315b6b1414882 Mon Sep 17 00:00:00 2001
From: Joe Banks <joe@jb3.dev>
Date: Sun, 9 Nov 2025 23:19:30 +0000
Subject: [PATCH 07/16] Add source cog to development bot

---
 dev/bot/__main__.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/dev/bot/__main__.py b/dev/bot/__main__.py
index 43c4dbd5c..e8522533b 100644
--- a/dev/bot/__main__.py
+++ b/dev/bot/__main__.py
@@ -7,6 +7,7 @@
 from discord.ext import commands
 
 import pydis_core
+from pydis_core.exts.source import SourceCode
 
 from . import Bot
 
@@ -30,6 +31,7 @@ async def main() -> None:
     """Run the bot."""
     bot.http_session = aiohttp.ClientSession()
     async with bot:
+        await bot.add_cog(SourceCode(bot, github_repo="https://github.com/python-discord/bot-core"))
         await bot.start(os.getenv("BOT_TOKEN"))
 
 

From 39a263470d2da738399e5fee00f7bf8c932765ca Mon Sep 17 00:00:00 2001
From: Joe Banks <joe@jb3.dev>
Date: Sun, 9 Nov 2025 23:19:46 +0000
Subject: [PATCH 08/16] Support commands that come from pydis_core

---
 pydis_core/exts/source.py | 33 +++++++++++++++++++++++++++++++--
 1 file changed, 31 insertions(+), 2 deletions(-)

diff --git a/pydis_core/exts/source.py b/pydis_core/exts/source.py
index a7525269f..7543d2fe6 100644
--- a/pydis_core/exts/source.py
+++ b/pydis_core/exts/source.py
@@ -1,6 +1,7 @@
 """Pre-built cog to display source code links for commands and cogs."""
 import enum
 import inspect
+from importlib import metadata
 from pathlib import Path
 from typing import NamedTuple, TYPE_CHECKING
 
@@ -13,6 +14,7 @@
 
 
 GITHUB_AVATAR = "https://avatars1.githubusercontent.com/u/9919"
+BOT_CORE_REPO = "https://github.com/python-discord/bot-core"
 
 class _TagIdentifierStub(NamedTuple):
     """A minmally functioning stub representing a tag identifier."""
@@ -34,7 +36,9 @@ class _SourceType(enum.StrEnum):
 
     help_command = enum.auto()
     text_command = enum.auto()
+    core_command = enum.auto()
     cog = enum.auto()
+    core_cog = enum.auto()
     tag = enum.auto()
     extension_not_loaded = enum.auto()
 
@@ -81,10 +85,14 @@ async def _get_source_object(ctx: "commands.Context[Bot]", argument: str) -> tup
 
         cog = ctx.bot.get_cog(argument)
         if cog:
+            if cog.__module__.startswith("pydis_core.exts"):
+                return cog, _SourceType.core_cog
             return cog, _SourceType.cog
 
         cmd = ctx.bot.get_command(argument)
         if cmd:
+            if cmd.module.startswith("pydis_core.exts"):
+                return cmd, _SourceType.core_command
             return cmd, _SourceType.text_command
 
         tags_cog = ctx.bot.get_cog("Tags")
@@ -109,7 +117,7 @@ def _get_source_link(self, source_item: object, source_type: _SourceType) -> tup
 
         Raise BadArgument if `source_item` is a dynamically-created object (e.g. via internal eval).
         """
-        if source_type == _SourceType.text_command:
+        if source_type == _SourceType.text_command or source_type == _SourceType.core_command:
             source_item = inspect.unwrap(source_item.callback)
             src = source_item.__code__
             filename = src.co_filename
@@ -137,10 +145,25 @@ def _get_source_link(self, source_item: object, source_type: _SourceType) -> tup
         # Handle tag file location differently than others to avoid errors in some cases
         if not first_line_no:
             file_location = Path(filename)
+        elif source_type == _SourceType.core_command:
+            package_location = metadata.distribution("pydis_core").locate_file("") / "pydis_core"
+            internal_location = Path(filename).relative_to(package_location).as_posix()
+            file_location = "pydis_core/" + internal_location
+        elif source_type == _SourceType.core_cog:
+            package_location = metadata.distribution("pydis_core").locate_file("") / "pydis_core" / "exts"
+            internal_location = Path(filename).relative_to(package_location).as_posix()
+            file_location = "pydis_core/exts/" + internal_location
         else:
             file_location = Path(filename).relative_to(Path.cwd()).as_posix()
 
-        url = f"{self.github_repo}/blob/main/{file_location}{lines_extension}"
+        repo = self.github_repo if source_type != _SourceType.core_command else BOT_CORE_REPO
+
+        if source_type == _SourceType.core_command or source_type == _SourceType.core_cog:
+            version = f"v{metadata.version('pydis_core')}"
+        else:
+            version = "main"
+
+        url = f"{repo}/blob/{version}/{file_location}{lines_extension}"
 
         return url, file_location, first_line_no or None
 
@@ -154,6 +177,12 @@ async def _build_embed(self, source_object: object, source_type: _SourceType) ->
         elif source_type == _SourceType.text_command:
             description = source_object.short_doc
             title = f"Command: {source_object.qualified_name}"
+        elif source_type == _SourceType.core_command:
+            description = source_object.short_doc
+            title = f"Core Command: {source_object.qualified_name}"
+        elif source_type == _SourceType.core_cog:
+            title = f"Core Cog: {source_object.qualified_name}"
+            description = source_object.description.splitlines()[0]
         elif source_type == _SourceType.tag:
             title = f"Tag: {source_object}"
             description = ""

From 00bc8ada15b87c7e5a91a88db07aefa195386d02 Mon Sep 17 00:00:00 2001
From: Joe Banks <joe@jb3.dev>
Date: Sun, 9 Nov 2025 23:24:46 +0000
Subject: [PATCH 09/16] Add changelog entry for SourceCode functionality

---
 docs/changelog.rst | 1 +
 1 file changed, 1 insertion(+)

diff --git a/docs/changelog.rst b/docs/changelog.rst
index 56355dfc9..96402c4d8 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -7,6 +7,7 @@ Changelog
 .. XXX: CHANGE DATE BEFORE RELEASE
 
 - :release:`12.0.0 <9th November 2025>`
+- :feature:`310` Provide a pre-built :obj:`pydis_core.exts.source.SourceCode` cog for providing links to command implementations.
 - :support:`309` Dependency bumps on all dependencies
 - :support:`309` Migrate build system from Poetry to uv
 - :support:`309` Explicit support for Python 3.13 and 3.14

From a3d35acf6bb92b9f2507e213c1f9a8f3e17ffdb3 Mon Sep 17 00:00:00 2001
From: Joe Banks <joe@jb3.dev>
Date: Sun, 9 Nov 2025 23:45:03 +0000
Subject: [PATCH 10/16] Trim trailing / from GitHub Repo

---
 pydis_core/exts/source.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pydis_core/exts/source.py b/pydis_core/exts/source.py
index 7543d2fe6..95f3e9677 100644
--- a/pydis_core/exts/source.py
+++ b/pydis_core/exts/source.py
@@ -56,7 +56,7 @@ class SourceCode(commands.Cog, description="Displays information about the bot's
 
     def __init__(self, bot: "Bot", github_repo: str) -> None:
         self.bot = bot
-        self.github_repo = github_repo
+        self.github_repo = github_repo.rstrip("/")
 
     @commands.command(name="source", aliases=("src",))
     async def source_command(

From 5a25124ddd24ee6bda79694feed7ce3931b318b2 Mon Sep 17 00:00:00 2001
From: Joe Banks <joe@jb3.dev>
Date: Sun, 9 Nov 2025 23:47:36 +0000
Subject: [PATCH 11/16] Replace __module__ with inspect.getmodule

---
 pydis_core/exts/source.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pydis_core/exts/source.py b/pydis_core/exts/source.py
index 95f3e9677..6c84ae5f0 100644
--- a/pydis_core/exts/source.py
+++ b/pydis_core/exts/source.py
@@ -85,7 +85,7 @@ async def _get_source_object(ctx: "commands.Context[Bot]", argument: str) -> tup
 
         cog = ctx.bot.get_cog(argument)
         if cog:
-            if cog.__module__.startswith("pydis_core.exts"):
+            if inspect.getmodule(cog).__name__.startswith("pydis_core.exts"):
                 return cog, _SourceType.core_cog
             return cog, _SourceType.cog
 

From 6242c29ed22b82f50263fd1d91608bf61b9efef7 Mon Sep 17 00:00:00 2001
From: Joe Banks <joe@jb3.dev>
Date: Sun, 9 Nov 2025 23:48:40 +0000
Subject: [PATCH 12/16] Move comment about tag handling

---
 pydis_core/exts/source.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pydis_core/exts/source.py b/pydis_core/exts/source.py
index 6c84ae5f0..c26be2484 100644
--- a/pydis_core/exts/source.py
+++ b/pydis_core/exts/source.py
@@ -142,7 +142,6 @@ def _get_source_link(self, source_item: object, source_type: _SourceType) -> tup
             first_line_no = None
             lines_extension = ""
 
-        # Handle tag file location differently than others to avoid errors in some cases
         if not first_line_no:
             file_location = Path(filename)
         elif source_type == _SourceType.core_command:
@@ -154,6 +153,7 @@ def _get_source_link(self, source_item: object, source_type: _SourceType) -> tup
             internal_location = Path(filename).relative_to(package_location).as_posix()
             file_location = "pydis_core/exts/" + internal_location
         else:
+            # Handle tag file location differently than others to avoid errors in some cases
             file_location = Path(filename).relative_to(Path.cwd()).as_posix()
 
         repo = self.github_repo if source_type != _SourceType.core_command else BOT_CORE_REPO

From 250d7e429025a036e7fb4dcff473b6f97de828f7 Mon Sep 17 00:00:00 2001
From: Joe Banks <joe@jb3.dev>
Date: Sun, 9 Nov 2025 23:50:40 +0000
Subject: [PATCH 13/16] Support GITHUB_SHA for creating permalinks

---
 pydis_core/exts/source.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pydis_core/exts/source.py b/pydis_core/exts/source.py
index c26be2484..e54fcc983 100644
--- a/pydis_core/exts/source.py
+++ b/pydis_core/exts/source.py
@@ -1,6 +1,7 @@
 """Pre-built cog to display source code links for commands and cogs."""
 import enum
 import inspect
+import os
 from importlib import metadata
 from pathlib import Path
 from typing import NamedTuple, TYPE_CHECKING
@@ -160,6 +161,8 @@ def _get_source_link(self, source_item: object, source_type: _SourceType) -> tup
 
         if source_type == _SourceType.core_command or source_type == _SourceType.core_cog:
             version = f"v{metadata.version('pydis_core')}"
+        elif sha := os.getenv("GITHUB_SHA"):
+            version = sha
         else:
             version = "main"
 

From 959ba9367bd7d1a0dda2f64afdc68c23ba9a273c Mon Sep 17 00:00:00 2001
From: Joe Banks <joe@jb3.dev>
Date: Sun, 9 Nov 2025 23:59:12 +0000
Subject: [PATCH 14/16] Include project name in footer

---
 pydis_core/exts/source.py | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/pydis_core/exts/source.py b/pydis_core/exts/source.py
index e54fcc983..ded9c7aaf 100644
--- a/pydis_core/exts/source.py
+++ b/pydis_core/exts/source.py
@@ -196,6 +196,12 @@ async def _build_embed(self, source_object: object, source_type: _SourceType) ->
         embed = Embed(title=title, description=description)
         embed.add_field(name="Source Code", value=f"[Go to GitHub]({url})")
         line_text = f":{first_line}" if first_line else ""
-        embed.set_footer(text=f"{location}{line_text}", icon_url=GITHUB_AVATAR)
+
+        if source_type == _SourceType.core_cog or source_type == _SourceType.core_command:
+            project_name = "pydis_core"
+        else:
+            project_name = self.bot.user.name
+
+        embed.set_footer(text=f"{project_name} \N{BLACK CIRCLE} {location}{line_text}", icon_url=GITHUB_AVATAR)
 
         return embed

From 032f1234c69844dce962a8c2559b269668d19fa9 Mon Sep 17 00:00:00 2001
From: Joe Banks <joe@jb3.dev>
Date: Mon, 10 Nov 2025 19:44:07 +0000
Subject: [PATCH 15/16] Unignore B904 (raise-without-from-inside-except)

---
 pyproject.toml | 1 -
 1 file changed, 1 deletion(-)

diff --git a/pyproject.toml b/pyproject.toml
index 3121d1b36..13ad72e1e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -104,7 +104,6 @@ select = ["ALL"]
 ignore = [
     "A005",
     "ANN002", "ANN003", "ANN204", "ANN206", "ANN401",
-    "B904",
     "C401", "C408", "C901",
     "COM812",
     "CPY001",

From 2fa5aa2037616b0cfd61ac67f6d145e6da12723a Mon Sep 17 00:00:00 2001
From: Joe Banks <joe@jb3.dev>
Date: Mon, 10 Nov 2025 19:44:23 +0000
Subject: [PATCH 16/16] Fix B904 across project
 (raise-without-from-except-inside)

---
 docs/utils.py                     | 2 +-
 pydis_core/_bot.py                | 4 ++--
 pydis_core/exts/source.py         | 8 ++++----
 pydis_core/site_api.py            | 4 ++--
 pydis_core/utils/function.py      | 8 ++++----
 pydis_core/utils/paste_service.py | 4 ++--
 6 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/docs/utils.py b/docs/utils.py
index 567f0d180..d11f0d9c5 100644
--- a/docs/utils.py
+++ b/docs/utils.py
@@ -98,7 +98,7 @@ def linkcode_resolve(repo_link: str, domain: str, info: dict[str, str]) -> str |
                 # These are ClassVars added by pydantic.
                 # Since they're not in our source code, we cannot resolve them to a url.
                 return None
-            raise Exception(f"Could not find symbol `{symbol_name}` in {module.__name__}.")
+            raise Exception(f"Could not find symbol `{symbol_name}` in {module.__name__}.") from None
 
         start, end = pos
         _, offset = inspect.getsourcelines(symbol[-2])
diff --git a/pydis_core/_bot.py b/pydis_core/_bot.py
index 783715dda..2510bd056 100644
--- a/pydis_core/_bot.py
+++ b/pydis_core/_bot.py
@@ -317,8 +317,8 @@ async def setup_hook(self) -> None:
 
         try:
             await self.ping_services()
-        except Exception as e:  # noqa: BLE001
-            raise StartupError(e)
+        except Exception as e:
+            raise StartupError(e) from e
 
     async def ping_services(self) -> None:
         """Ping all required services on setup to ensure they are up before starting."""
diff --git a/pydis_core/exts/source.py b/pydis_core/exts/source.py
index ded9c7aaf..b53fe859d 100644
--- a/pydis_core/exts/source.py
+++ b/pydis_core/exts/source.py
@@ -129,14 +129,14 @@ def _get_source_link(self, source_item: object, source_type: _SourceType) -> tup
             src = type(source_item)
             try:
                 filename = inspect.getsourcefile(src)
-            except TypeError:
-                raise commands.BadArgument("Cannot get source for a dynamically-created object.")
+            except TypeError as e:
+                raise commands.BadArgument("Cannot get source for a dynamically-created object.") from e
 
         if source_type != _SourceType.tag:
             try:
                 lines, first_line_no = inspect.getsourcelines(src)
-            except OSError:
-                raise commands.BadArgument("Cannot get source for a dynamically-created object.")
+            except OSError as e:
+                raise commands.BadArgument("Cannot get source for a dynamically-created object.") from e
 
             lines_extension = f"#L{first_line_no}-L{first_line_no+len(lines)-1}"
         else:
diff --git a/pydis_core/site_api.py b/pydis_core/site_api.py
index f948cde3a..bcad781af 100644
--- a/pydis_core/site_api.py
+++ b/pydis_core/site_api.py
@@ -92,9 +92,9 @@ async def maybe_raise_for_status(response: aiohttp.ClientResponse, *, should_rai
             try:
                 response_json = await response.json()
                 raise ResponseCodeError(response=response, response_json=response_json)
-            except aiohttp.ContentTypeError:
+            except aiohttp.ContentTypeError as e:
                 response_text = await response.text()
-                raise ResponseCodeError(response=response, response_text=response_text)
+                raise ResponseCodeError(response=response, response_text=response_text) from e
 
     async def request(self, method: str, endpoint: str, *, raise_for_status: bool = True, **kwargs) -> dict | None:
         """
diff --git a/pydis_core/utils/function.py b/pydis_core/utils/function.py
index 2d2b79235..f28722074 100644
--- a/pydis_core/utils/function.py
+++ b/pydis_core/utils/function.py
@@ -51,16 +51,16 @@ def get_arg_value(name_or_pos: Argument, arguments: BoundArgs) -> typing.Any:
 
         try:
             _name, value = arg_values[arg_pos]
-        except IndexError:
-            raise ValueError(f"Argument position {arg_pos} is out of bounds.")
+        except IndexError as e:
+            raise ValueError(f"Argument position {arg_pos} is out of bounds.") from e
         else:
             return value
     elif isinstance(name_or_pos, str):
         arg_name = name_or_pos
         try:
             return arguments[arg_name]
-        except KeyError:
-            raise ValueError(f"Argument {arg_name!r} doesn't exist.")
+        except KeyError as e:
+            raise ValueError(f"Argument {arg_name!r} doesn't exist.") from e
     else:
         raise TypeError("'arg' must either be an int (positional index) or a str (keyword).")
 
diff --git a/pydis_core/utils/paste_service.py b/pydis_core/utils/paste_service.py
index 140e6cdc2..26b7c7d7b 100644
--- a/pydis_core/utils/paste_service.py
+++ b/pydis_core/utils/paste_service.py
@@ -98,8 +98,8 @@ async def send_to_paste_service(
         try:
             async with http_session.get(f"{paste_url}/api/v1/lexer") as response:
                 response_json = await response.json()  # Supported lexers are the keys.
-        except HTTPException:
-            raise PasteUploadError("Could not fetch supported lexers from selected paste_url.")
+        except HTTPException as e:
+            raise PasteUploadError("Could not fetch supported lexers from selected paste_url.") from e
 
         _lexers_supported_by_pastebin[paste_url] = list(response_json)