feat: Enhance memory management and promotion rules for Mattermost context and user prompts

.opencode/plugins/mattermost-inbox.js

@@ -26,6 +26,15 @@ async function resolveSyncCommand(directory) {
   }
 }
 
+async function resolveSyncContent(directory, stdoutText) {
+  const cleaned = (stdoutText || "").trim()
+  if (cleaned) return cleaned
+
+  const generatedPath = path.join(directory, "scripts/mattermost/generated/mattermost_context.jsonl")
+  const generated = await safeRead(generatedPath)
+  return (generated || "").trim()
+}
+
 export const MattermostInbox = async ({ $, directory, client }) => {
   let lastSyncAt = 0
 
@@ -54,7 +63,8 @@ export const MattermostInbox = async ({ $, directory, client }) => {
 
     try {
       await mkdir(inboxDir, { recursive: true })
-      const output = (await $`bash -lc ${command}`.text()).trim()
+      const stdoutText = await $`bash -lc ${command}`.text()
+      const output = await resolveSyncContent(directory, stdoutText)
       const previous = await safeRead(latestPath)
 
       if (output) {