fix: safe_send routes embed= + fails loud on unknown kwargs; embed helpers deep-copy (no input mutation)

Signed-off-by: disqualifier <dev@disqualifier.me>

README.md

@@ -7,7 +7,7 @@ text chunking, timestamp helpers, interactive await-prompts, and a limit-safe se
 ## Install
 
 ```
-dpy_commons @ git+ssh://git@git.rethinkstudios.io/rethink-public/dpy_commons.git@v0.1.2
+dpy_commons @ git+ssh://git@git.rethinkstudios.io/rethink-public/dpy_commons.git@v0.1.3
 ```
 
 ## Usage
@@ -91,7 +91,10 @@ apply to **every** chunked message, not just the first, so a suppressed `@everyo
 stays suppressed across the whole split. Once-only kwargs (`file`, `files`, `stickers`,
 `nonce`, `reference`, `mention_author`, `view`, `poll`, `delete_after`) still ride the first
 message only. A bare `safe_send(destination)` with no content/embeds sends a single message
-with `content=None`.
+with `content=None`. A singular `embed=` kwarg is folded into the `embeds` pipeline (fit +
+split like any other embed); passing both `embed` and `embeds` raises `TypeError`, matching
+discord.py's own `Messageable.send` rule. Any kwarg `safe_send` doesn't recognize also raises
+`TypeError` naming it, rather than being silently dropped.
 
 ## Notes / deviations
 

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "dpy_commons"
-version = "0.1.2"
+version = "0.1.3"
 description = "Shared discord.py utilities — message/embed parsing, limit-fitting, link extraction, chunking, timestamps, await-prompts, limit-safe send. Config-free, installable."
 requires-python = ">=3.10"
 dependencies = [

src/dpy_commons/embeds.py

@@ -2,6 +2,7 @@
 and split a list into sendable groups; none of these mutate their input"""
 from __future__ import annotations
 
+import copy
 import logging
 
 import discord
@@ -25,8 +26,12 @@ _ZWSP = "​"
 
 
 def _copy(embed: discord.Embed) -> discord.Embed:
-    """deep copy via dict round-trip so the input is never mutated"""
-    return discord.Embed.from_dict(embed.to_dict())
+    """deep copy via dict round-trip so the input is never mutated
+
+    discord.py 2.7.1's to_dict() reuses the embed's own _fields list rather than copying
+    it, so from_dict(embed.to_dict()) would still share that list with the input; the
+    explicit deepcopy breaks that aliasing"""
+    return discord.Embed.from_dict(copy.deepcopy(embed.to_dict()))
 
 
 def fit_embed(embed: discord.Embed) -> discord.Embed:

src/dpy_commons/send.py

@@ -34,14 +34,28 @@ async def safe_send(
     `view`, `poll`, `delete_after`) ride only on the FIRST message so they aren't duplicated
     across the split
 
+    a singular `embed=` kwarg is folded into the `embeds` pipeline (fit + split like any
+    other embed); passing both `embed` and `embeds` raises `TypeError`, matching
+    discord.py's own `Messageable.send` rule. Any other kwarg not recognized by either
+    whitelist above also raises `TypeError` naming it, instead of being silently dropped
+
     with no content and no embeds, one message is still sent (content=None) so a bare
     safe_send(destination) or a files/view-only call goes out as a single message rather than
     silently doing nothing"""
-    content_chunks = chunk_text(content) if content else []
-    embed_groups = split_embeds([fit_embed(embed) for embed in embeds]) if embeds else []
+    embed = kwargs.pop("embed", None)
+    if embed is not None:
+        if embeds is not None:
+            raise TypeError("safe_send() cannot mix embed and embeds")
+        embeds = [embed]
 
     per_chunk = {k: v for k, v in kwargs.items() if k in _PER_CHUNK_KWARGS}
     once_only = {k: v for k, v in kwargs.items() if k in _ONCE_ONLY_KWARGS}
+    unexpected = [k for k in kwargs if k not in _PER_CHUNK_KWARGS and k not in _ONCE_ONLY_KWARGS]
+    if unexpected:
+        raise TypeError(f"safe_send() got unexpected keyword argument(s): {', '.join(unexpected)}")
+
+    content_chunks = chunk_text(content) if content else []
+    embed_groups = split_embeds([fit_embed(e) for e in embeds]) if embeds else []
 
     messages: "list[discord.Message]" = []
     first = True