diff --git a/changelog.md b/changelog.md
index 1f5ff74..acb8d59 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,14 @@
 # Changelog
 
+## 2026-02-06 - 1.8.0 - feat(build)
+add optional content-hash based build cache to skip rebuilding unchanged Dockerfiles
+
+- Introduce TsDockerCache to compute SHA-256 of Dockerfile content and persist cache to .nogit/tsdocker_support.json
+- Add ICacheEntry and ICacheData interfaces and a cached flag to IBuildCommandOptions
+- Integrate cached mode in TsDockerManager: skip builds on cache hits, verify image presence, record builds on misses, and still perform dependency tagging
+- Expose --cached option in CLI to enable the cached build flow
+- Cache records store contentHash, imageId, buildTag and timestamp
+
 ## 2026-02-06 - 1.7.0 - feat(cli)
 add CLI version display using commitinfo
 
diff --git a/ts/00_commitinfo_data.ts b/ts/00_commitinfo_data.ts
index 56120b1..0bc6db8 100644
--- a/ts/00_commitinfo_data.ts
+++ b/ts/00_commitinfo_data.ts
@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@git.zone/tsdocker',
-  version: '1.7.0',
+  version: '1.8.0',
   description: 'develop npm modules cross platform with docker'
 }
diff --git a/ts/classes.tsdockercache.ts b/ts/classes.tsdockercache.ts
new file mode 100644
index 0000000..a6be1fb
--- /dev/null
+++ b/ts/classes.tsdockercache.ts
@@ -0,0 +1,117 @@
+import * as crypto from 'crypto';
+import * as fs from 'fs';
+import * as path from 'path';
+import * as plugins from './tsdocker.plugins.js';
+import * as paths from './tsdocker.paths.js';
+import { logger } from './tsdocker.logging.js';
+import type { ICacheData, ICacheEntry } from './interfaces/index.js';
+
+const smartshellInstance = new plugins.smartshell.Smartshell({
+  executor: 'bash',
+});
+
+/**
+ * Manages content-hash-based build caching for Dockerfiles.
+ * Cache is stored in .nogit/tsdocker_support.json.
+ */
+export class TsDockerCache {
+  private cacheFilePath: string;
+  private data: ICacheData;
+
+  constructor() {
+    this.cacheFilePath = path.join(paths.cwd, '.nogit', 'tsdocker_support.json');
+    this.data = { version: 1, entries: {} };
+  }
+
+  /**
+   * Loads cache data from disk. Falls back to empty cache on missing/corrupt file.
+   */
+  public load(): void {
+    try {
+      const raw = fs.readFileSync(this.cacheFilePath, 'utf-8');
+      const parsed = JSON.parse(raw);
+      if (parsed && parsed.version === 1 && parsed.entries) {
+        this.data = parsed;
+      } else {
+        logger.log('warn', '[cache] Cache file has unexpected format, starting fresh');
+        this.data = { version: 1, entries: {} };
+      }
+    } catch {
+      // Missing or corrupt file — start fresh
+      this.data = { version: 1, entries: {} };
+    }
+  }
+
+  /**
+   * Saves cache data to disk. Creates .nogit directory if needed.
+   */
+  public save(): void {
+    const dir = path.dirname(this.cacheFilePath);
+    fs.mkdirSync(dir, { recursive: true });
+    fs.writeFileSync(this.cacheFilePath, JSON.stringify(this.data, null, 2), 'utf-8');
+  }
+
+  /**
+   * Computes SHA-256 hash of Dockerfile content.
+   */
+  public computeContentHash(content: string): string {
+    return crypto.createHash('sha256').update(content).digest('hex');
+  }
+
+  /**
+   * Checks whether a build can be skipped for the given Dockerfile.
+   * Logs detailed diagnostics and returns true if the build should be skipped.
+   */
+  public async shouldSkipBuild(cleanTag: string, content: string): Promise<boolean> {
+    const contentHash = this.computeContentHash(content);
+    const entry = this.data.entries[cleanTag];
+
+    if (!entry) {
+      console.log(`[cache] ${cleanTag}:`);
+      console.log(`[cache]   Content hash: ${contentHash}`);
+      console.log(`[cache]   Stored hash:  (none)`);
+      console.log(`[cache]   Hash match:   no`);
+      console.log(`→ Building ${cleanTag}`);
+      return false;
+    }
+
+    const hashMatch = entry.contentHash === contentHash;
+    console.log(`[cache] ${cleanTag}:`);
+    console.log(`[cache]   Content hash: ${contentHash}`);
+    console.log(`[cache]   Stored hash:  ${entry.contentHash}`);
+    console.log(`[cache]   Image ID:     ${entry.imageId}`);
+    console.log(`[cache]   Hash match:   ${hashMatch ? 'yes' : 'no'}`);
+
+    if (!hashMatch) {
+      console.log(`→ Building ${cleanTag}`);
+      return false;
+    }
+
+    // Hash matches — verify the image still exists locally
+    const inspectResult = await smartshellInstance.exec(
+      `docker image inspect ${entry.imageId} > /dev/null 2>&1`
+    );
+    const available = inspectResult.exitCode === 0;
+    console.log(`[cache]   Available:    ${available ? 'yes' : 'no'}`);
+
+    if (available) {
+      console.log(`→ Skipping build for ${cleanTag} (cache hit)`);
+      return true;
+    }
+
+    console.log(`→ Building ${cleanTag} (image no longer available)`);
+    return false;
+  }
+
+  /**
+   * Records a successful build in the cache.
+   */
+  public recordBuild(cleanTag: string, content: string, imageId: string, buildTag: string): void {
+    this.data.entries[cleanTag] = {
+      contentHash: this.computeContentHash(content),
+      imageId,
+      buildTag,
+      timestamp: Date.now(),
+    };
+  }
+}
diff --git a/ts/classes.tsdockermanager.ts b/ts/classes.tsdockermanager.ts
index 3da51f4..ff19481 100644
--- a/ts/classes.tsdockermanager.ts
+++ b/ts/classes.tsdockermanager.ts
@@ -4,6 +4,7 @@ import { logger } from './tsdocker.logging.js';
 import { Dockerfile } from './classes.dockerfile.js';
 import { DockerRegistry } from './classes.dockerregistry.js';
 import { RegistryStorage } from './classes.registrystorage.js';
+import { TsDockerCache } from './classes.tsdockercache.js';
 import type { ITsDockerConfig, IBuildCommandOptions } from './interfaces/index.js';
 
 const smartshellInstance = new plugins.smartshell.Smartshell({
@@ -136,11 +137,54 @@ export class TsDockerManager {
     }
 
     logger.log('info', `Building ${toBuild.length} Dockerfiles...`);
-    await Dockerfile.buildDockerfiles(toBuild, {
-      platform: options?.platform,
-      timeout: options?.timeout,
-      noCache: options?.noCache,
-    });
+
+    if (options?.cached) {
+      // === CACHED MODE: skip builds for unchanged Dockerfiles ===
+      logger.log('info', '=== CACHED MODE ACTIVE ===');
+      const cache = new TsDockerCache();
+      cache.load();
+
+      for (const dockerfileArg of toBuild) {
+        const skip = await cache.shouldSkipBuild(dockerfileArg.cleanTag, dockerfileArg.content);
+        if (skip) {
+          continue;
+        }
+
+        // Cache miss — build this Dockerfile
+        await dockerfileArg.build({
+          platform: options?.platform,
+          timeout: options?.timeout,
+          noCache: options?.noCache,
+        });
+
+        const imageId = await dockerfileArg.getId();
+        cache.recordBuild(dockerfileArg.cleanTag, dockerfileArg.content, imageId, dockerfileArg.buildTag);
+      }
+
+      // Perform dependency tagging for all Dockerfiles (even cache hits, since tags may be stale)
+      for (const dockerfileArg of toBuild) {
+        const dependentBaseImages = new Set<string>();
+        for (const other of toBuild) {
+          if (other.localBaseDockerfile === dockerfileArg && other.baseImage !== dockerfileArg.buildTag) {
+            dependentBaseImages.add(other.baseImage);
+          }
+        }
+        for (const fullTag of dependentBaseImages) {
+          logger.log('info', `Tagging ${dockerfileArg.buildTag} as ${fullTag} for local dependency resolution`);
+          await smartshellInstance.exec(`docker tag ${dockerfileArg.buildTag} ${fullTag}`);
+        }
+      }
+
+      cache.save();
+    } else {
+      // === STANDARD MODE: build all via static helper ===
+      await Dockerfile.buildDockerfiles(toBuild, {
+        platform: options?.platform,
+        timeout: options?.timeout,
+        noCache: options?.noCache,
+      });
+    }
+
     logger.log('success', 'All Dockerfiles built successfully');
 
     return toBuild;
diff --git a/ts/interfaces/index.ts b/ts/interfaces/index.ts
index 226a1f4..9269bb6 100644
--- a/ts/interfaces/index.ts
+++ b/ts/interfaces/index.ts
@@ -77,4 +77,17 @@ export interface IBuildCommandOptions {
   platform?: string;    // Single platform override (e.g., 'linux/arm64')
   timeout?: number;     // Build timeout in seconds
   noCache?: boolean;    // Force rebuild without Docker layer cache (--no-cache)
+  cached?: boolean;     // Skip builds when Dockerfile content hasn't changed
+}
+
+export interface ICacheEntry {
+  contentHash: string;   // SHA-256 hex of Dockerfile content
+  imageId: string;       // Docker image ID (sha256:...)
+  buildTag: string;
+  timestamp: number;     // Unix ms
+}
+
+export interface ICacheData {
+  version: 1;
+  entries: { [cleanTag: string]: ICacheEntry };
 }
diff --git a/ts/tsdocker.cli.ts b/ts/tsdocker.cli.ts
index 8708d18..16f724d 100644
--- a/ts/tsdocker.cli.ts
+++ b/ts/tsdocker.cli.ts
@@ -49,6 +49,9 @@ export let run = () => {
       if (argvArg.cache === false) {
         buildOptions.noCache = true;
       }
+      if (argvArg.cached) {
+        buildOptions.cached = true;
+      }
 
       await manager.build(buildOptions);
       logger.log('success', 'Build completed successfully');
@@ -142,6 +145,9 @@ export let run = () => {
       if (argvArg.cache === false) {
         buildOptions.noCache = true;
       }
+      if (argvArg.cached) {
+        buildOptions.cached = true;
+      }
       await manager.build(buildOptions);
 
       // Run tests