diff --git a/changelog.md b/changelog.md
index 8e4dec7..e614d77 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,14 @@
 # Changelog
 
+## 2025-10-17 - 2.6.0 - feat(runtime-adapters)
+Add runtime environment availability check and logger output; normalize runtime version strings
+
+- Introduce checkEnvironment() in TsTest and invoke it at the start of run() to detect available runtimes before executing tests.
+- Add environmentCheck(availability) to TsTestLogger to print a human-friendly environment summary (with JSON and quiet-mode handling).
+- Normalize reported runtime version strings from adapters: prefix Deno and Bun versions with 'v' and simplify Chromium version text.
+- Display runtime availability information to the user before moving previous logs or running tests.
+- Includes addition of local .claude/settings.local.json (local dev/tooling settings).
+
 ## 2025-10-17 - 2.5.2 - fix(runtime.node)
 Improve Node runtime adapter to use tsrun.spawnPath, strengthen tsrun detection, and improve process lifecycle and loader handling; update tsrun dependency.
 
diff --git a/ts/00_commitinfo_data.ts b/ts/00_commitinfo_data.ts
index 3dc6542..a9f737f 100644
--- a/ts/00_commitinfo_data.ts
+++ b/ts/00_commitinfo_data.ts
@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@git.zone/tstest',
-  version: '2.5.2',
+  version: '2.6.0',
   description: 'a test utility to run tests that match test/**/*.ts'
 }
diff --git a/ts/tstest.classes.runtime.bun.ts b/ts/tstest.classes.runtime.bun.ts
index f322ca4..63fcdb8 100644
--- a/ts/tstest.classes.runtime.bun.ts
+++ b/ts/tstest.classes.runtime.bun.ts
@@ -47,11 +47,11 @@ export class BunRuntimeAdapter extends RuntimeAdapter {
       }
 
       // Bun version is just the version number
-      const version = result.stdout.trim();
+      const version = `v${result.stdout.trim()}`;
 
       return {
         available: true,
-        version: `Bun ${version}`,
+        version: version,
       };
     } catch (error) {
       return {
diff --git a/ts/tstest.classes.runtime.chromium.ts b/ts/tstest.classes.runtime.chromium.ts
index c43dd15..9130708 100644
--- a/ts/tstest.classes.runtime.chromium.ts
+++ b/ts/tstest.classes.runtime.chromium.ts
@@ -37,7 +37,7 @@ export class ChromiumRuntimeAdapter extends RuntimeAdapter {
       // The browser binary is usually handled by @push.rocks/smartbrowser
       return {
         available: true,
-        version: 'Chromium (via smartbrowser)',
+        version: 'via smartbrowser',
       };
     } catch (error) {
       return {
diff --git a/ts/tstest.classes.runtime.deno.ts b/ts/tstest.classes.runtime.deno.ts
index f972687..0163bc2 100644
--- a/ts/tstest.classes.runtime.deno.ts
+++ b/ts/tstest.classes.runtime.deno.ts
@@ -67,11 +67,11 @@ export class DenoRuntimeAdapter extends RuntimeAdapter {
 
       // Parse Deno version from output (first line is "deno X.Y.Z")
       const versionMatch = result.stdout.match(/deno (\d+\.\d+\.\d+)/);
-      const version = versionMatch ? versionMatch[1] : 'unknown';
+      const version = versionMatch ? `v${versionMatch[1]}` : 'unknown';
 
       return {
         available: true,
-        version: `Deno ${version}`,
+        version: version,
       };
     } catch (error) {
       return {
diff --git a/ts/tstest.classes.tstest.ts b/ts/tstest.classes.tstest.ts
index ec0b2be..33a4380 100644
--- a/ts/tstest.classes.tstest.ts
+++ b/ts/tstest.classes.tstest.ts
@@ -62,7 +62,19 @@ export class TsTest {
     );
   }
 
+  /**
+   * Check and display available runtimes
+   */
+  private async checkEnvironment() {
+    const availability = await this.runtimeRegistry.checkAvailability();
+    this.logger.environmentCheck(availability);
+    return availability;
+  }
+
   async run() {
+    // Check and display environment
+    await this.checkEnvironment();
+    
     // Move previous log files if --logfile option is used
     if (this.logger.options.logFile) {
       await this.movePreviousLogFiles();
diff --git a/ts/tstest.logging.ts b/ts/tstest.logging.ts
index d317a24..350aa80 100644
--- a/ts/tstest.logging.ts
+++ b/ts/tstest.logging.ts
@@ -137,6 +137,43 @@ export class TsTestLogger {
       this.log(this.format(`   Found: ${count} test file(s)`, 'green'));
     }
   }
+
+  // Environment check - display available runtimes
+  environmentCheck(availability: Map<string, { available: boolean; version?: string; error?: string }>) {
+    if (this.options.json) {
+      const runtimes: any = {};
+      for (const [runtime, info] of availability) {
+        runtimes[runtime] = info;
+      }
+      this.logJson({ event: 'environmentCheck', runtimes });
+      return;
+    }
+    
+    if (this.options.quiet) return;
+    
+    this.log(this.format('\n🌍 Test Environment', 'bold'));
+    
+    // Define runtime display names
+    const runtimeNames: Record<string, string> = {
+      node: 'Node.js',
+      deno: 'Deno',
+      bun: 'Bun',
+      chromium: 'Chrome/Chromium'
+    };
+    
+    // Display each runtime
+    for (const [runtime, info] of availability) {
+      const displayName = runtimeNames[runtime] || runtime;
+      
+      if (info.available) {
+        const versionStr = info.version ? ` ${info.version}` : '';
+        this.log(this.format(`   ✓ ${displayName}${versionStr}`, 'green'));
+      } else {
+        const errorStr = info.error ? ` (${info.error})` : '';
+        this.log(this.format(`   ✗ ${displayName}${errorStr}`, 'dim'));
+      }
+    }
+  }
   
   // Test execution
   testFileStart(filename: string, runtime: string, index: number, total: number) {