diff --git a/.gitea/scripts/registry_prune.py b/.gitea/scripts/registry_prune.py
new file mode 100644
index 0000000..12c40ec
--- /dev/null
+++ b/.gitea/scripts/registry_prune.py
@@ -0,0 +1,277 @@
+#!/usr/bin/env python3
+"""
+Registry Image Tag Pruner - Keeps only the latest 1 SHA-tag per repository.
+
+Usage:
+    python3 registry_prune.py \
+        --registry registry.nxtgauge.com \
+        --repo nxtgauge-rust-gateway \
+        --username "$REGISTRY_USERNAME" \
+        --password "$REGISTRY_PASSWORD"
+
+Environment variables can also be used:
+    REGISTRY_HOST, REGISTRY_REPO, REGISTRY_USERNAME, REGISTRY_PASSWORD
+
+SHA-like tags are identified by pattern: ^[a-f0-9]{40}$
+Non-SHA tags (e.g., high-performance-latest, main-latest, latest) are NEVER deleted.
+
+Exit code: 0 on success (or if prune fails gracefully), non-zero only on critical error.
+"""
+
+import argparse
+import base64
+import json
+import os
+import sys
+import time
+from urllib.request import Request, urlopen
+from urllib.error import URLError, HTTPError
+
+
+def parse_args():
+    parser = argparse.ArgumentParser(
+        description="Prune Docker registry tags, keeping only the latest SHA tag."
+    )
+    parser.add_argument("--registry", default=os.environ.get("REGISTRY_HOST"))
+    parser.add_argument("--repo", default=os.environ.get("REGISTRY_REPO"))
+    parser.add_argument("--username", default=os.environ.get("REGISTRY_USERNAME"))
+    parser.add_argument("--password", default=os.environ.get("REGISTRY_PASSWORD"))
+    parser.add_argument("--keep", type=int, default=1, help="Number of SHA tags to keep (default: 1)")
+    return parser.parse_args()
+
+
+def api_request(url: str, method: str, username: str, password: str, data=None, retries: int = 3) -> dict | None:
+    """Make an authenticated API request with retry logic."""
+    auth = base64.b64encode(f"{username}:{password}".encode()).decode()
+    headers = {
+        "Authorization": f"Basic {auth}",
+        "Content-Type": "application/json",
+    }
+
+    for attempt in range(1, retries + 1):
+        try:
+            req = Request(url, method=method, headers=headers, data=data)
+            with urlopen(req, timeout=30) as response:
+                content = response.read()
+                if content:
+                    return json.loads(content)
+                return {}
+        except HTTPError as e:
+            if e.code == 401:
+                print(f"  [ERROR] Authentication failed (401)")
+                return None
+            if e.code == 404:
+                print(f"  [WARN] Resource not found: {url}")
+                return None
+            print(f"  [RETRY {attempt}/{retries}] HTTP {e.code} for {url}")
+        except URLError as e:
+            print(f"  [RETRY {attempt}/{retries}] URL error: {e.reason}")
+        except Exception as e:
+            print(f"  [RETRY {attempt}/{retries}] Error: {e}")
+
+        if attempt < retries:
+            time.sleep(attempt * 2)
+
+    print(f"  [ERROR] Failed after {retries} attempts for {url}")
+    return None
+
+
+def get_tag_digest(registry: str, repo: str, tag: str, username: str, password: str) -> tuple[str, str] | None:
+    """Get the digest (sha256:...) and created time for a tag."""
+    url = f"https://{registry}/v2/{repo}/manifests/{tag}"
+    auth = base64.b64encode(f"{username}:{password}".encode()).decode()
+
+    for attempt in range(1, 4):
+        try:
+            req = Request(url, method="GET", headers={
+                "Authorization": f"Basic {auth}",
+                "Accept": "application/vnd.docker.distribution.manifest.v2+json",
+            })
+            with urlopen(req, timeout=30) as response:
+                digest = response.headers.get("Docker-Content-Digest", "")
+                created = response.headers.get("Date", "")
+                return digest, created
+        except Exception as e:
+            print(f"  [RETRY {attempt}/3] Getting digest for {tag}: {e}")
+            time.sleep(attempt)
+
+    return None
+
+
+def delete_tag(registry: str, repo: str, digest: str, username: str, password: str) -> bool:
+    """Delete a tag by its digest."""
+    url = f"https://{registry}/v2/{repo}/manifests/{digest}"
+    auth = base64.b64encode(f"{username}:{password}".encode()).decode()
+
+    for attempt in range(1, 4):
+        try:
+            req = Request(url, method="DELETE", headers={
+                "Authorization": f"Basic {auth}",
+            })
+            with urlopen(req, timeout=30) as response:
+                if response.status in (200, 202, 404):
+                    return True
+        except HTTPError as e:
+            if e.code == 404:
+                return True  # Already deleted
+            print(f"  [RETRY {attempt}/3] Deleting {digest[:20]}...: {e}")
+        except Exception as e:
+            print(f"  [RETRY {attempt}/3] Deleting {digest[:20]}...: {e}")
+
+        time.sleep(attempt)
+
+    return False
+
+
+def is_sha_tag(tag: str) -> bool:
+    """Check if tag looks like a SHA (40 hex chars)."""
+    import re
+    return bool(re.match(r"^[a-f0-9]{40}$", tag))
+
+
+def prune_tags(registry: str, repo: str, username: str, password: str, keep: int = 1) -> bool:
+    """
+    Main prune logic:
+    - List all tags for the repo
+    - Filter SHA-like tags
+    - Sort by created date (newest first)
+    - Keep newest `keep` tags
+    - Delete older SHA tags by digest
+    - Never delete non-SHA tags
+    """
+    print(f"\n=== Pruning {registry}/{repo} ===")
+    print(f"Strategy: Keep {keep} newest SHA tag(s), delete older SHA tags")
+    print(f"Non-SHA tags (e.g., high-performance-latest, main-latest, latest) are preserved\n")
+
+    # Get catalog (list of repos)
+    catalog_url = f"https://{registry}/v2/_catalog"
+    catalog = api_request(catalog_url, "GET", username, password)
+    if catalog is None:
+        print("[ERROR] Failed to get repository catalog")
+        return False
+
+    if repo not in catalog.get("repositories", []):
+        print(f"[INFO] Repository {repo} not found in catalog")
+        return True
+
+    # Get tags for repo
+    tags_url = f"https://{registry}/v2/{repo}/tags/list"
+    tags_data = api_request(tags_url, "GET", username, password)
+    if tags_data is None:
+        print(f"[ERROR] Failed to get tags for {repo}")
+        return False
+
+    all_tags = tags_data.get("tags", [])
+    if not all_tags:
+        print("[INFO] No tags found")
+        return True
+
+    # Separate SHA tags from non-SHA tags
+    sha_tags = [t for t in all_tags if is_sha_tag(t)]
+    non_sha_tags = [t for t in all_tags if not is_sha_tag(t)]
+
+    print(f"Total tags: {len(all_tags)}")
+    print(f"  SHA tags (candidates for pruning): {len(sha_tags)}")
+    print(f"  Non-SHA tags (protected): {len(non_sha_tags)}")
+    if non_sha_tags:
+        print(f"  Protected tags: {', '.join(sorted(non_sha_tags))}")
+
+    if not sha_tags:
+        print("\n[INFO] No SHA tags to prune")
+        return True
+
+    # Get digest and created time for each SHA tag
+    tag_info = []
+    for tag in sha_tags:
+        result = get_tag_digest(registry, repo, tag, username, password)
+        if result:
+            digest, created = result
+            tag_info.append({
+                "tag": tag,
+                "digest": digest,
+                "created": created,
+                "timestamp": parse_http_date(created) if created else 0,
+            })
+        time.sleep(0.1)  # Be nice to the registry
+
+    if not tag_info:
+        print("\n[ERROR] Could not get info for any SHA tags")
+        return False
+
+    # Sort by timestamp (newest first)
+    tag_info.sort(key=lambda x: x["timestamp"], reverse=True)
+
+    print(f"\nSHA tags sorted by age (newest first):")
+    for i, info in enumerate(tag_info):
+        marker = " [KEEP]" if i < keep else " [DELETE]"
+        print(f"  {i+1}. {info['tag']} ({info['created'] or 'unknown date'}){marker}")
+
+    # Delete older SHA tags
+    deleted_count = 0
+    kept_count = 0
+
+    for i, info in enumerate(tag_info):
+        if i < keep:
+            print(f"\n[KEEP] {info['tag']}")
+            kept_count += 1
+            continue
+
+        print(f"\n[DELETE] {info['tag']} (digest: {info['digest'][:20]}...)")
+        if delete_tag(registry, repo, info["digest"], username, password):
+            print(f"  [OK] Deleted {info['tag']}")
+            deleted_count += 1
+        else:
+            print(f"  [WARN] Failed to delete {info['tag']} (will retry next run)")
+
+        time.sleep(0.2)  # Be nice to the registry
+
+    print(f"\n=== Prune Summary ===")
+    print(f"Tags kept: {kept_count}")
+    print(f"Tags deleted: {deleted_count}")
+    print(f"Tags protected (non-SHA): {len(non_sha_tags)}")
+
+    return True
+
+
+def parse_http_date(date_str: str) -> float:
+    """Parse HTTP Date header to timestamp."""
+    from email.utils import parsedate_to_datetime
+    try:
+        return parsedate_to_datetime(date_str).timestamp()
+    except Exception:
+        return 0
+
+
+def main():
+    args = parse_args()
+
+    # Validate required args
+    registry = args.registry or os.environ.get("REGISTRY_HOST")
+    repo = args.repo or os.environ.get("REGISTRY_REPO")
+    username = args.username or os.environ.get("REGISTRY_USERNAME")
+    password = args.password or os.environ.get("REGISTRY_PASSWORD")
+
+    if not all([registry, repo, username, password]):
+        print("[ERROR] Missing required arguments. Need: --registry, --repo, --username, --password")
+        print("Or set environment variables: REGISTRY_HOST, REGISTRY_REPO, REGISTRY_USERNAME, REGISTRY_PASSWORD")
+        sys.exit(1)
+
+    print(f"Registry: {registry}")
+    print(f"Repository: {repo}")
+    print(f"Username: {username}")
+
+    try:
+        success = prune_tags(registry, repo, username, password, args.keep)
+        if success:
+            print("\n[OK] Prune completed successfully")
+            sys.exit(0)
+        else:
+            print("\n[WARN] Prune completed with some errors")
+            sys.exit(0)  # Exit 0 per requirement - never fail workflow
+    except Exception as e:
+        print(f"\n[ERROR] Prune failed with exception: {e}")
+        sys.exit(0)  # Exit 0 per requirement - never fail workflow
+
+
+if __name__ == "__main__":
+    main()
diff --git a/.gitea/workflows/build.yaml b/.gitea/workflows/build.yaml
index e45b0ce..e020445 100644
--- a/.gitea/workflows/build.yaml
+++ b/.gitea/workflows/build.yaml
@@ -44,3 +44,19 @@ jobs:
             -t "$REGISTRY_HOSTPORT/nxtgauge-ai-assistant:${{ gitea.sha }}" \
             -t "$REGISTRY_HOSTPORT/nxtgauge-ai-assistant:main-latest" \
             .
+
+      - name: Prune old image tags (keep latest 1 SHA)
+        if: success()
+        continue-on-error: true
+        env:
+          REGISTRY_HOST: ${{ secrets.REGISTRY_HOSTPORT }}
+          REGISTRY_USERNAME: ${{ secrets.REGISTRY_USERNAME }}
+          REGISTRY_PASSWORD: ${{ secrets.REGISTRY_PASSWORD }}
+        run: |
+          set -euo pipefail
+          python3 .gitea/scripts/registry_prune.py \
+            --registry "$REGISTRY_HOST" \
+            --repo "nxtgauge-ai-assistant" \
+            --username "$REGISTRY_USERNAME" \
+            --password "$REGISTRY_PASSWORD" \
+            --keep 1