feat(discuss): suggest reusable rule candidates

Author: haasonsaas

TODO.md

@@ -96,7 +96,7 @@ This roadmap is derived from deep research into Greptile's public docs, blog, MC
 57. [x] Add a "train the reviewer" callout when thumbs coverage on a review is low.
 58. [x] Add review-change comparisons so users can diff one review run against the next on the same PR.
 59. [x] Add better surfacing for incremental PR reviews so users know when only the delta was reviewed.
-60. [ ] Add discussion workflows that can convert repeated human comments into candidate rules or context snippets.
+60. [x] Add discussion workflows that can convert repeated human comments into candidate rules or context snippets.
 
 ## 7. Analytics, Reporting, and Quality Dashboards
 

src/commands/misc/discussion.rs

@@ -1,3 +1,5 @@
+#[path = "discussion/candidates.rs"]
+mod candidates;
 #[path = "discussion/command.rs"]
 mod command;
 #[path = "discussion/prompt.rs"]
@@ -9,4 +11,4 @@ mod thread;
 #[path = "discussion/types.rs"]
 mod types;
 
-pub use command::discuss_command;
+pub use command::{discuss_command, DiscussCommandRequest};