diff --git a/server.py b/server.py
index f56abdc..3be7ff7 100644
--- a/server.py
+++ b/server.py
@@ -30,6 +30,7 @@ from tasks import render_effect
 
 # L2 server for auth verification
 L2_SERVER = os.environ.get("L2_SERVER", "http://localhost:8200")
+L2_DOMAIN = os.environ.get("L2_DOMAIN", "artdag.rose-ash.com")
 
 # Cache directory (use /data/cache in Docker, ~/.artdag/cache locally)
 CACHE_DIR = Path(os.environ.get("CACHE_DIR", str(Path.home() / ".artdag" / "cache")))
@@ -96,7 +97,8 @@ class RunStatus(BaseModel):
     celery_task_id: Optional[str] = None
     effects_commit: Optional[str] = None
     effect_url: Optional[str] = None  # URL to effect source code
-    username: Optional[str] = None  # Owner of the run
+    username: Optional[str] = None  # Owner of the run (ActivityPub actor ID)
+    infrastructure: Optional[dict] = None  # Hardware/software used for rendering
 
 
 # ============ Auth ============
@@ -274,6 +276,9 @@ async def create_run(request: RunRequest, username: str = Depends(get_required_u
     # Generate output name if not provided
     output_name = request.output_name or f"{request.recipe}-{run_id[:8]}"
 
+    # Format username as ActivityPub actor ID
+    actor_id = f"@{username}@{L2_DOMAIN}"
+
     # Create run record
     run = RunStatus(
         run_id=run_id,
@@ -282,7 +287,7 @@ async def create_run(request: RunRequest, username: str = Depends(get_required_u
         inputs=request.inputs,
         output_name=output_name,
         created_at=datetime.now(timezone.utc).isoformat(),
-        username=username
+        username=actor_id
     )
 
     # Submit to Celery
@@ -324,6 +329,9 @@ async def get_run(run_id: str):
                     run.effects_commit = effects[0].get("repo_commit")
                     run.effect_url = effects[0].get("repo_url")
 
+                # Extract infrastructure info
+                run.infrastructure = result.get("infrastructure")
+
                 # Cache the output
                 output_path = Path(result.get("output", {}).get("local_path", ""))
                 if output_path.exists():
@@ -900,6 +908,8 @@ async def ui_detail_page(run_id: str):
                 if effects:
                     run.effects_commit = effects[0].get("repo_commit")
                     run.effect_url = effects[0].get("repo_url")
+                # Extract infrastructure info
+                run.infrastructure = result.get("infrastructure")
                 output_path = Path(result.get("output", {}).get("local_path", ""))
                 if output_path.exists():
                     cache_file(output_path)
@@ -979,10 +989,18 @@ async def ui_detail_page(run_id: str):
     html += f'''
     <div class="provenance">
         <h2>Provenance</h2>
+        <div class="prov-item">
+            <div class="prov-label">Owner</div>
+            <div class="prov-value">{run.username or "anonymous"}</div>
+        </div>
         <div class="prov-item">
             <div class="prov-label">Effect</div>
             <div class="prov-value"><a href="{effect_url}" target="_blank">{run.recipe}</a></div>
         </div>
+        <div class="prov-item">
+            <div class="prov-label">Effects Commit</div>
+            <div class="prov-value">{run.effects_commit or "N/A"}</div>
+        </div>
         <div class="prov-item">
             <div class="prov-label">Input(s)</div>
             <div class="prov-value">
@@ -1002,6 +1020,20 @@ async def ui_detail_page(run_id: str):
         </div>
         '''
 
+    # Infrastructure section
+    if run.infrastructure:
+        software = run.infrastructure.get("software", {})
+        hardware = run.infrastructure.get("hardware", {})
+        html += f'''
+        <div class="prov-item">
+            <div class="prov-label">Infrastructure</div>
+            <div class="prov-value">
+                Software: {software.get("name", "unknown")} ({software.get("content_hash", "unknown")[:16]}...)<br>
+                Hardware: {hardware.get("name", "unknown")} ({hardware.get("content_hash", "unknown")[:16]}...)
+            </div>
+        </div>
+        '''
+
     html += f'''
         <div class="prov-item">
             <div class="prov-label">Run ID</div>
@@ -1042,6 +1074,7 @@ async def ui_detail_page(run_id: str):
         "created_at": run.created_at,
         "completed_at": run.completed_at,
         "username": run.username,
+        "infrastructure": run.infrastructure,
         "error": run.error
     }, indent=2)
 
@@ -1077,6 +1110,8 @@ async def ui_run_partial(run_id: str):
                 if effects:
                     run.effects_commit = effects[0].get("repo_commit")
                     run.effect_url = effects[0].get("repo_url")
+                # Extract infrastructure info
+                run.infrastructure = result.get("infrastructure")
                 output_path = Path(result.get("output", {}).get("local_path", ""))
                 if output_path.exists():
                     cache_file(output_path)
diff --git a/tasks.py b/tasks.py
index 73b8906..5f0df0c 100644
--- a/tasks.py
+++ b/tasks.py
@@ -17,6 +17,7 @@ from celery_app import app
 
 # Add effects to path (use env var in Docker, fallback to home dir locally)
 EFFECTS_PATH = Path(os.environ.get("EFFECTS_PATH", str(Path.home() / "artdag-effects")))
+ARTDAG_PATH = Path(os.environ.get("ARTDAG_PATH", str(Path.home() / "art" / "artdag")))
 
 
 def get_effects_commit() -> str:
@@ -35,6 +36,22 @@ def get_effects_commit() -> str:
     return "unknown"
 
 
+def get_artdag_commit() -> str:
+    """Get current git commit hash of artdag repo."""
+    try:
+        result = subprocess.run(
+            ["git", "rev-parse", "HEAD"],
+            cwd=ARTDAG_PATH,
+            capture_output=True,
+            text=True
+        )
+        if result.returncode == 0:
+            return result.stdout.strip()
+    except Exception:
+        pass
+    return "unknown"
+
+
 sys.path.insert(0, str(EFFECTS_PATH / "dog"))
 
 
@@ -128,11 +145,13 @@ def render_effect(self, input_hash: str, effect_name: str, output_name: str) ->
     # Build effect info based on source
     if effect_name == "identity":
         # Identity is from artdag package on GitHub
+        artdag_commit = get_artdag_commit()
         effect_info = {
             "name": f"effect:{effect_name}",
             "content_hash": REGISTRY[f"effect:{effect_name}"]["hash"],
             "repo": "github",
-            "repo_url": "https://github.com/gilesbradshaw/art-dag/blob/main/artdag/nodes/effect.py"
+            "repo_commit": artdag_commit,
+            "repo_url": f"https://github.com/gilesbradshaw/art-dag/blob/{artdag_commit}/artdag/nodes/effect.py"
         }
     else:
         # Other effects from rose-ash effects repo