feat: add self-mention filtering with regex in MentionBot and update default model in README

Adds a `filterSelfMentions` method to `MentionBot.swift` that uses `NSRegularExpression` to strip case-insensitive bot username mentions from AI responses before posting, preventing infinite reply loops. Updates the default OpenRouter model from `x-ai/grok-3-fast-beta` to `x-ai/grok-code-fast-1` in README.md, along with revised example model identifiers for Claude, Gemini, and other providers.
2025-12-20 20:36:15 +00:00
parent 3bd2edba80
commit 4d3a29a435
3 changed files with 33 additions and 5 deletions
@@ -201,8 +201,27 @@ actor MentionBot {
        return context
    }

+    private func filterSelfMentions(from text: String) -> String {
+        guard let pattern = try? NSRegularExpression(
+            pattern: "@\(NSRegularExpression.escapedPattern(for: botUsername))",
+            options: [.caseInsensitive]
+        ) else {
+            return text
+        }
+
+        let range = NSRange(text.startIndex..., in: text)
+        return pattern.stringByReplacingMatches(
+            in: text,
+            options: [],
+            range: range,
+            withTemplate: ""
+        ).replacingOccurrences(of: "  ", with: " ")
+         .trimmingCharacters(in: .whitespaces)
+    }
+
    private func postReply(rantId: Int, replyTo: String, response: String) async {
-        let reply = "@\(replyTo) \(response)"
+        let filteredResponse = filterSelfMentions(from: response)
+        let reply = "@\(replyTo) \(filteredResponse)"

        guard !dryRun else {
            await logger.info("DRY RUN: Would post reply to rant \(rantId):\n\(reply)")