chore: update prompt guidance and version

Author: LIU9293

package.json

@@ -1,6 +1,6 @@
 {
   "name": "ode",
-  "version": "0.0.26",
+  "version": "0.0.27",
   "description": "Ode - OpenCode chat controller for Slack",
   "module": "packages/core/index.ts",
   "type": "module",

packages/agents/shared.ts

@@ -12,11 +12,6 @@ export function buildSlackSystemPrompt(slack?: SlackContext): string {
     "- Use short paragraphs, avoid walls of text",
     "- Get straight to the point",
     "",
-    "MESSAGE BREVITY:",
-    "- Prefer short results over step-by-step narration",
-    "- Skip tool call labels like ':arrow_forward: bash'",
-    "- If listing tasks, keep it compact",
-    "",
     "PROGRESS CHECKLIST:",
     "- Share a short checklist of what you're doing",
     "- Mention searches once with a result count if known",
@@ -25,6 +20,7 @@ export function buildSlackSystemPrompt(slack?: SlackContext): string {
     "GIT AUTHORING:",
     "- If GIT_AUTHOR_NAME and GIT_AUTHOR_EMAIL are set, use them explicitly in commit commands.",
     "- Prefer: git commit --author=\"$GIT_AUTHOR_NAME <$GIT_AUTHOR_EMAIL>\" -m \"...\"",
+    "- Use GH_TOKEN for gh commands when available.",
     "",
     "SLACK CONTEXT:",
   ];