diff --git a/changelog.md b/changelog.md
index d270c82..8205811 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## 2026-03-05 - 4.1.6 - fix(mod_compiler)
+add diagnostic logging to report dist_ts and output directory contents after each compilation task and after import-path rewriting
+
+- Adds DIAG-CROSSTASK logs to inspect dist_ts subdirectories after each task when not in quiet or JSON mode
+- Adds DIAG-FINAL logs to report directory names and file counts for each successful output dir after import-path rewriting
+- Diagnostics use dynamic fs import and are non-intrusive: gated by isQuiet/isJson and errors are ignored
+
 ## 2026-03-05 - 4.1.5 - fix(diagnostics)
 add diagnostic logging around compilation and unpack to aid troubleshooting
 
diff --git a/ts/00_commitinfo_data.ts b/ts/00_commitinfo_data.ts
index a8c261c..d355d21 100644
--- a/ts/00_commitinfo_data.ts
+++ b/ts/00_commitinfo_data.ts
@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@git.zone/tsbuild',
-  version: '4.1.5',
+  version: '4.1.6',
   description: 'A tool for compiling TypeScript files using the latest nightly features, offering flexible APIs and a CLI for streamlined development.'
 }
diff --git a/ts/mod_compiler/classes.tscompiler.ts b/ts/mod_compiler/classes.tscompiler.ts
index 5f61c0a..482b3f1 100644
--- a/ts/mod_compiler/classes.tscompiler.ts
+++ b/ts/mod_compiler/classes.tscompiler.ts
@@ -394,6 +394,19 @@ export class TsCompiler {
 
         successfulOutputDirs.push(destDir);
       }
+
+      // DIAGNOSTIC: Check dist_ts after each task (not just current destDir)
+      if (!isQuiet && !isJson) {
+        try {
+          const fs = await import('fs');
+          const distTsPath = require('path').join(this.cwd, 'dist_ts');
+          if (fs.existsSync(distTsPath)) {
+            const dirEntries = fs.readdirSync(distTsPath, { withFileTypes: true });
+            const dirs = dirEntries.filter((e: any) => e.isDirectory()).map((e: any) => e.name).sort();
+            console.log(`   📋 [DIAG-CROSSTASK] dist_ts after task ${currentTask}: ${dirs.length} dirs [${dirs.join(', ')}]`);
+          }
+        } catch (e: any) { /* ignore */ }
+      }
     }
 
     // Rewrite import paths in all output directories to handle cross-module references
@@ -410,6 +423,20 @@ export class TsCompiler {
       }
     }
 
+    // DIAGNOSTIC: Check dist_ts after path rewriting
+    if (!isQuiet && !isJson) {
+      for (const outputDir of successfulOutputDirs) {
+        try {
+          const fs = await import('fs');
+          const dirEntries = fs.readdirSync(outputDir, { withFileTypes: true });
+          const dirs = dirEntries.filter((e: any) => e.isDirectory()).map((e: any) => e.name).sort();
+          const fileCount = dirEntries.filter((e: any) => e.isFile()).length;
+          const relDir = outputDir.replace(this.cwd, '').replace(/^\//, '');
+          console.log(`   📋 [DIAG-FINAL] ${relDir}: ${dirs.length} dirs [${dirs.join(', ')}], ${fileCount} files`);
+        } catch (e: any) { console.log(`   📋 [DIAG-FINAL] Error: ${e.message}`); }
+      }
+    }
+
     // Merge all error summaries
     const finalErrorSummary = this.mergeErrorSummaries(errorSummaries);