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Add sender context mode for text generation (#104)

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Add a per-room/global `sender_context_mode` setting that optionally
prefixes conversation messages with sender metadata before sending them
to the model provider.

This helps models distinguish between participants in multi-user rooms.
                                                                                                                                                                                                                                                             
Three modes are supported:
- `disabled` (default, no change)
- `matrix_user_id` (prefixes with `[sender=@user:server]`)
- `matrix_user_id_and_timestamp` (adds `send_at`; Example: `[sender=@user:server sent_at=<ISO 8601>]`)
                                                                                                                                                                                                                                                             
Sender context is applied to user and assistant text messages only,
skipping system prompts and non-text content.

Mixed-sender merged turns (something we intentionally do for Anthropic)
have their `sender_id` cleared to avoid misattribution.
This commit is contained in:
kschwank
2026-03-25 19:14:34 +01:00
committed by GitHub
parent 661e7263fb
commit 2d659964a7
25 changed files with 719 additions and 14 deletions
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8
src/controller/image/prompt.rs
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@@ -64,6 +64,7 @@ mod tests {
original_prompt: "Generate a picture of a dog",
messages: vec![Message {
author: Author::User,
sender_id: None,
content: MessageContent::Text("Must be blue".to_owned()),
timestamp,
}],
@@ -75,16 +76,19 @@ mod tests {
messages: vec![
Message {
author: Author::User,
sender_id: None,
content: MessageContent::Text("Must be blue".to_owned()),
timestamp,
},
Message {
author: Author::Assistant,
sender_id: None,
content: MessageContent::Text("Whatever".to_owned()),
timestamp,
},
Message {
author: Author::User,
sender_id: None,
content: MessageContent::Text(
"Must be 3-legged.\nMust be flying.".to_owned(),
),
@@ -99,21 +103,25 @@ mod tests {
messages: vec![
Message {
author: Author::User,
sender_id: None,
content: MessageContent::Text("Must be blue".to_owned()),
timestamp,
},
Message {
author: Author::Assistant,
sender_id: None,
content: MessageContent::Text("Whatever".to_owned()),
timestamp,
},
Message {
author: Author::User,
sender_id: None,
content: MessageContent::Text("Again".to_owned()),
timestamp,
},
Message {
author: Author::User,
sender_id: None,
content: MessageContent::Text("again".to_owned()),
timestamp,
},