fix: load skill content via lazyContentLoader in slashcommand tool

- Fix #542: slashcommand tool returns empty content for skills
- Add lazyContentLoader to CommandInfo type
- Load skill content in formatLoadedCommand when content is empty
- Filter non-ultrawork keywords in subagent sessions

src/hooks/keyword-detector/index.ts

@@ -21,12 +21,37 @@ export function createKeywordDetectorHook(ctx: PluginInput) {
       }
     ): Promise<void> => {
       const promptText = extractPromptText(output.parts)
-      const detectedKeywords = detectKeywordsWithType(removeCodeBlocks(promptText), input.agent)
+      let detectedKeywords = detectKeywordsWithType(removeCodeBlocks(promptText), input.agent)
 
       if (detectedKeywords.length === 0) {
         return
       }
 
+      // Check if this is a subagent session (has parent)
+      // Only ultrawork keywords work in subagent sessions
+      // Other keywords (search, analyze, etc.) only work in main sessions
+      try {
+        const sessionInfo = await ctx.client.session.get({ path: { id: input.sessionID } })
+        const isSubagentSession = !!sessionInfo.data?.parentID
+
+        if (isSubagentSession) {
+          // Filter to only ultrawork keywords in subagent sessions
+          detectedKeywords = detectedKeywords.filter((k) => k.type === "ultrawork")
+          if (detectedKeywords.length === 0) {
+            log(`[keyword-detector] Skipping non-ultrawork keywords in subagent session`, {
+              sessionID: input.sessionID,
+              parentID: sessionInfo.data?.parentID,
+            })
+            return
+          }
+        }
+      } catch (err) {
+        log(`[keyword-detector] Failed to get session info, proceeding with all keywords`, {
+          error: err,
+          sessionID: input.sessionID,
+        })
+      }
+
       const hasUltrawork = detectedKeywords.some((k) => k.type === "ultrawork")
       if (hasUltrawork) {
         log(`[keyword-detector] Ultrawork mode activated`, { sessionID: input.sessionID })