fix(telegram): enable file attachments in final answers + update domain

- Make sendMedia handler fall back to SendDocument for unknown media types (zip, csv, pdf, etc.)
- Add explicit file attachment instructions to Telegram system prompt (MEDIA:document:/path)
- Update odek website URL from kode.21no.de → odek.21no.de in defaultSystem + Quick Facts
- Update test to validate document fallback instead of error

Author: molty3000

cmd/odek/main.go

@@ -47,7 +47,7 @@ var version string
 //
 // Users can override this with --system, ODEK_SYSTEM, or system field
 // in config files. The default is used when no override is provided.
-const defaultSystem = `⚠️ ANTI-PATTERN — NEVER do this: call search_files, browser, shell, or any tool to look up basic facts about odek (its website, owner, repository, stack, or configuration). These are all defined in THIS prompt. If a user asks "what is odek's website?", just answer: https://kode.21no.de. Tool calls for odek facts waste time and tokens.
+const defaultSystem = `⚠️ ANTI-PATTERN — NEVER do this: call search_files, browser, shell, or any tool to look up basic facts about odek (its website, owner, repository, stack, or configuration). These are all defined in THIS prompt. If a user asks "what is odek's website?", just answer: https://odek.21no.de. Tool calls for odek facts waste time and tokens.
 
 You are odek — an expert software engineer who ships. You have deep knowledge of systems, architecture, and the craft of writing software. You work fast, think clearly, and build things that last.
 
@@ -56,7 +56,7 @@ About odek:
   binary (~11 MB, instant startup) that implements the ReAct loop with tools,
   skills, memory, sub-agents, and sandboxing.
 - Built by 21no.de (https://21no.de), an AI/systems research lab.
-- Website: https://kode.21no.de
+- Website: https://odek.21no.de
 - GitHub: injected from config (see Repository URL below).
 - Stack: Go 1.24+, minimal dependencies, Docker sandbox support,
   layered config (global → project → env → CLI), Telegram bot integration.

cmd/odek/telegram.go

@@ -149,14 +149,22 @@ func telegramCmd(args []string) error {
 
 	// Telegram-specific Quick Facts and recovery guidance
 	systemMessage += "\n\nQuick Facts (use these, do NOT search):\n"
-	systemMessage += "- odek website: https://kode.21no.de\n"
+	systemMessage += "- odek website: https://odek.21no.de\n"
 	systemMessage += "- Built by: 21no.de (https://21no.de)\n"
 	if resolved.GithubRepoUrl != "" {
 		systemMessage += fmt.Sprintf("- Source code: %s\n", resolved.GithubRepoUrl)
 	}
-	systemMessage += "- Binary name: odek (repo is called kode on GitHub)\n"
+	systemMessage += "- Binary name: odek\n"
 	systemMessage += "- Language: Go, minimal dependencies, ~11 MB binary\n"
 	systemMessage += "\n"
+	systemMessage += "File attachment:\n"
+	systemMessage += "- You CAN send files (zip, pdf, images, csv, etc.) in BOTH intermediate replies\n"
+	systemMessage += "  (via send_message with the 'file' parameter) AND in your final answer.\n"
+	systemMessage += "- For final answers: include MEDIA:document:/absolute/path/to/file at the START\n"
+	systemMessage += "  of your response to attach a file. The user will receive it as a native document.\n"
+	systemMessage += "- For images: use MEDIA:photo:/path, for voice: MEDIA:voice:/path.\n"
+	systemMessage += "- The file MUST exist on disk at the path you provide.\n"
+	systemMessage += "\n"
 	systemMessage += "Tool failure recovery:\n"
 	systemMessage += "- If a tool fails with 'no such file' or returns empty, check pwd first.\n"
 	systemMessage += "- NEVER run 'find /' or recursive searches from root — they hang.\n"

internal/telegram/handler.go

@@ -446,11 +446,12 @@ func (h *Handler) sendMedia(chatID int64, text string, replyToMessageID int) {
 		}
 		_, err = h.Bot.SendDocument(chatID, filePath, "", opts)
 	default:
-		h.log.Error("unknown media type", "chat_id", chatID, "media_type", mediaType)
-		if h.OnError != nil {
-			h.OnError(chatID, fmt.Errorf("telegram: unknown media type: %s", mediaType))
+		// Unknown media type — send as a document (zip, csv, pdf, etc.)
+		var opts *SendOpts
+		if replyToMessageID != 0 {
+			opts = &SendOpts{ReplyToMessageID: replyToMessageID}
 		}
-		return
+		_, err = h.Bot.SendDocument(chatID, filePath, "", opts)
 	}
 
 	if err != nil {

internal/telegram/handler_test.go

@@ -1086,21 +1086,18 @@ func TestSendResponse_MediaUnknownType(t *testing.T) {
 	bot := testBot(t, ts)
 	h := NewHandler(bot)
 
-	errCalled := false
-	h.OnError = func(_ int64, err error) {
-		errCalled = true
-	}
-
 	h.SendResponse(123, "MEDIA:video:"+tmpPath, 0)
 
 	reqs := rec.all()
+	found := false
 	for _, req := range reqs {
-		if strings.HasSuffix(req.Path, "/sendPhoto") || strings.HasSuffix(req.Path, "/sendVoice") || strings.HasSuffix(req.Path, "/sendDocument") {
-			t.Errorf("unexpected send request for unknown media type: %s", req.Path)
+		if strings.HasSuffix(req.Path, "/sendDocument") {
+			found = true
+			break
 		}
 	}
-	if !errCalled {
-		t.Error("OnError was not called for unknown media type")
+	if !found {
+		t.Error("expected sendDocument for unknown media type, got none")
 	}
 }