2026-06-30 08:40:24 -04:00
15 changed files with 434 additions and 41 deletions
@@ -10,11 +10,16 @@ RUN apt-get update \
    && rm -rf /var/lib/apt/lists/*

 WORKDIR /app
+# torch from the CUDA-12.4 wheel index (matches the base image); its wheels
+# bundle their own CUDA + cuDNN and coexist with onnxruntime-gpu. Installed
+# first + separately so the GPU build of torch is deterministic and layer-cached.
+RUN pip3 install --no-cache-dir torch==2.6.0 --index-url https://download.pytorch.org/whl/cu124
 COPY requirements.txt .
 RUN pip3 install --no-cache-dir -r requirements.txt
 COPY fc_agent ./fc_agent

-# imgutils caches downloaded ONNX models here; mount a volume to persist them.
+# imgutils ONNX models + the transformers SigLIP weights both cache here; mount
+# a volume to persist them across restarts (the SigLIP download is ~3.5 GB once).
 ENV HF_HOME=/models
 EXPOSE 8770

@@ -10,6 +10,13 @@
 #   4. Open http://localhost:8770 → Start. Pause/Stop hands the GPU back.
 #      docker compose down       to stop the container entirely.
 #
+# Surviving a curator redeploy (you're away, can't touch the agent):
+#   - A running agent rides out curator being unreachable on its own — it retries
+#     leasing with capped backoff and resumes when the server is back. In-flight
+#     work is handed back (not failed), so a redeploy never poisons good jobs.
+#   - AUTO_START=1 (below) also resumes the worker if the AGENT container itself
+#     restarts (host reboot / crash via `restart: unless-stopped`) — no click.
+#
 # Needs the NVIDIA Container Toolkit installed on the host for --gpus.

 services:
@@ -24,6 +31,12 @@ services:
      CCIP_MODEL: ${CCIP_MODEL:-}
      DETECTOR_LEVEL: ${DETECTOR_LEVEL:-m}
      BATCH_SIZE: ${BATCH_SIZE:-4}
+      # Resume the worker automatically on container start (survive a reboot /
+      # crash-restart while you're away). Set to 0 to require a manual Start.
+      AUTO_START: ${AUTO_START:-1}
+      # Crop embedder (SigLIP concept bag): float16 keeps VRAM low on a shared
+      # desktop GPU; the model itself is announced by the server.
+      SIGLIP_DTYPE: ${SIGLIP_DTYPE:-float16}
    volumes:
      # Persist the downloaded ONNX models so restarts are fast.
      - fc-agent-models:/models
@@ -16,6 +16,16 @@ worker = Worker(cfg)
 app = FastAPI(title="FabledCurator GPU agent")


+@app.on_event("startup")
+def _maybe_autostart() -> None:
+    # With AUTO_START set, a container restart (host reboot, or `restart:
+    # unless-stopped` after a crash) resumes the worker on its own — the slots
+    # then ride out a still-down curator via lease backoff. Lets the agent
+    # survive a redeploy with nobody at the desktop to click Start.
+    if cfg.auto_start and cfg.token:
+        worker.start()
+
+
@app.get("/", response_class=HTMLResponse)
 def index() -> str:
    return _PAGE
@@ -86,6 +96,10 @@ _PAGE = """<!doctype html><html><head><meta charset=utf-8>
 <span class=stat><span class=n id=active>0</span><br>active now</span>
 <span class=stat><span class=n id=done>0</span><br>processed</span>
 <span class=stat><span class=n id=err>0</span><br>errors</span>
+ <span class=stat><span class=n id=wait>0</span><br>waited out</span>
+</div>
+<div id=banner style="display:none;margin:.6rem 0;padding:.5rem .8rem;border-radius:6px;background:#5a4a17;color:#ffe28a">
+ curator unreachable — holding work + retrying, will resume on its own (no restart needed)
 </div>
 <div class=gpu id=gpu>GPU — …</div>
 <div class=bar><i id=gpubar style=width:0%></i></div>
@@ -103,7 +117,10 @@ _PAGE = """<!doctype html><html><head><meta charset=utf-8>
  const s=await (await fetch('/status')).json()
  CAP=s.max_concurrency||8; capn.textContent=CAP
  state.textContent=s.state; active.textContent=s.active; done.textContent=s.processed
-  err.textContent=s.errors; fc.textContent=s.fc_url
+  err.textContent=s.errors; fc.textContent=s.fc_url; wait.textContent=s.transient||0
+  // Running but the queue read failed → curator is unreachable; show we're
+  // riding it out rather than erroring.
+  banner.style.display=(s.state==='running' && !s.queue)?'block':'none'
  if(document.activeElement!==conc) conc.value=s.concurrency
  conc.max=CAP
  cfg.textContent=s.configured?'set':'MISSING'
@@ -13,6 +13,11 @@ class Config:
    ccip_model: str      # imgutils CCIP model name ("" → imgutils default)
    detector_level: str  # imgutils person-detector level: n|s|m|x
    poll_idle_seconds: float   # wait between empty leases
+    embed_dtype: str     # torch dtype for the crop embedder: float16|float32
+    embed_model_override: str  # force a SigLIP-family model ("" → use the one
+    #                            the server announces in the lease)
+    auto_start: bool     # start the worker pool on boot (so a container restart
+    #                      resumes processing without anyone clicking Start)

    @classmethod
    def from_env(cls) -> "Config":
@@ -25,4 +30,7 @@ class Config:
            ccip_model=os.environ.get("CCIP_MODEL", ""),
            detector_level=os.environ.get("DETECTOR_LEVEL", "m"),
            poll_idle_seconds=float(os.environ.get("POLL_IDLE_SECONDS", "10")),
+            embed_dtype=os.environ.get("SIGLIP_DTYPE", "float16"),
+            embed_model_override=os.environ.get("EMBED_MODEL_NAME", ""),
+            auto_start=os.environ.get("AUTO_START", "").lower() in ("1", "true", "yes"),
        )
@@ -0,0 +1,69 @@
+"""Crop EMBEDDER for the concept bag — model-agnostic (CLIP/SigLIP-family).
+
+The server trains its per-concept heads in the embedding space of whatever model
+its `embedder_model_version` names; a crop must be embedded with the SAME model
+or its vector lands in a different coordinate system and every head misfires. So
+the model identity (HF name + version) is ANNOUNCED BY THE SERVER in the lease —
+nothing here is hardcoded to SigLIP. Whatever name the server sends is loaded via
+transformers `get_image_features` (the CLIP/SigLIP-family image-tower call); a
+non-CLIP backbone (e.g. a DINO encoder) would need its own pooling adapter.
+
+torch on CUDA, fp16 by default to keep VRAM low on a shared desktop GPU — the
+tiny fp16-vs-fp32 difference is negligible for the linear heads (cosine ~0.999).
+A single inference lock serializes the forward pass: the pipeline is I/O-bound,
+so the GPU isn't the bottleneck, and one model shared across worker threads is
+safest behind a lock.
+"""
+import threading
+
+import numpy as np
+from PIL import Image
+
+
+class CropEmbedder:
+    def __init__(self, model_name: str, dtype: str = "float16"):
+        self._name = model_name
+        self._dtype_name = dtype
+        self._model = None
+        self._processor = None
+        self._torch = None
+        self._device = None
+        self._dt = None
+        self._load_lock = threading.Lock()
+        self._infer_lock = threading.Lock()
+
+    @property
+    def model_name(self) -> str:
+        return self._name
+
+    def load(self) -> None:
+        if self._model is not None:
+            return
+        with self._load_lock:
+            if self._model is not None:
+                return
+            import torch
+            from transformers import AutoImageProcessor, AutoModel
+
+            self._torch = torch
+            self._device = "cuda" if torch.cuda.is_available() else "cpu"
+            dt = getattr(torch, self._dtype_name, torch.float16)
+            if self._device == "cpu":
+                dt = torch.float32   # fp16 matmul is unsupported/slow on CPU
+            self._dt = dt
+            self._processor = AutoImageProcessor.from_pretrained(self._name)
+            model = AutoModel.from_pretrained(self._name, torch_dtype=dt)
+            model.eval().to(self._device)
+            self._model = model
+
+    def embed(self, image: Image.Image) -> list[float]:
+        """A crop → its embedding as a plain float list, ready to POST."""
+        self.load()
+        torch = self._torch
+        enc = self._processor(images=image, return_tensors="pt")
+        pixel_values = enc["pixel_values"].to(self._device, self._dt)
+        with self._infer_lock, torch.no_grad():
+            out = self._model.get_image_features(pixel_values=pixel_values)
+        pooled = out.pooler_output if hasattr(out, "pooler_output") else out
+        vec = pooled[0].float().cpu().numpy().astype(np.float32).reshape(-1)
+        return vec.tolist()
@@ -10,18 +10,43 @@ Stop (or shrinking the pool) RELEASES a slot's still-leased jobs immediately so
 orphaned work is re-picked at once rather than waiting out the lease.
 """
 import threading
-import time
+
+import requests

 from . import media, models
 from .client import FcClient
 from .config import Config
 from .crops import crop_region

+# Cap on the lease-retry backoff: when curator is unreachable (e.g. you redeploy
+# it while away), each slot retries leasing with exponential backoff up to this
+# many seconds, then resumes within this window once the server is back — no
+# restart needed.
+MAX_BACKOFF_SECONDS = 60.0
+
+
+def _is_transient(exc: "requests.RequestException") -> bool:
+    """A server/transport problem (wait it out) vs a job-specific fault (fail it).
+    No response → connection refused/timeout → curator is down → transient. With
+    a response: 5xx, auth (401/403, e.g. a token blip on redeploy), 408/409/429
+    (timeout / our lease reclaimed / rate-limited) are all 'not this job's fault'.
+    A specific 4xx like 404 (image gone) / 400 IS the job's fault → fail it."""
+    resp = getattr(exc, "response", None)
+    if resp is None:
+        return True
+    return resp.status_code >= 500 or resp.status_code in (401, 403, 408, 409, 429)
+
 # Generous cap: the pipeline is usually I/O-bound (downloading + decoding images
 # over HTTP), so the GPU stays underused until many workers overlap that I/O.
 # Push it up while watching the GPU util + VRAM in the UI.
 MAX_CONCURRENCY = 32

+# Fallbacks only — the server ANNOUNCES the embedding model (name + version) in
+# the lease so the agent stays model-agnostic and in lock-step with the space
+# the heads were trained in. These cover an older server that doesn't send them.
+DEFAULT_EMBED_MODEL = "google/siglip-so400m-patch14-384"
+DEFAULT_EMBED_VERSION = "siglip-so400m-patch14-384"
+

 class _Slot:
    """One worker loop. `inflight` = jobs leased but not yet processed, so a
@@ -43,7 +68,13 @@ class Worker:
        self._slots: list[_Slot] = []
        self.processed = 0
        self.errors = 0
+        self.transient = 0        # jobs handed back due to a server outage (NOT
+        #                           failed) — the "waiting out curator" counter
        self._active = 0          # slots currently mid-image
+        # The crop embedder (SigLIP-family) is built lazily on the first job that
+        # needs it, from the model the server announces — one shared instance.
+        self._embedder = None
+        self._embedder_lock = threading.Lock()

    # --- control -----------------------------------------------------------
    def start(self):
@@ -82,31 +113,48 @@ class Worker:
                "active": self._active,
                "processed": self.processed,
                "errors": self.errors,
+                "transient": self.transient,
            }

-    def _bump(self, *, processed=0, errors=0, active=0):
+    def _bump(self, *, processed=0, errors=0, active=0, transient=0):
        with self._lock:
            self.processed += processed
            self.errors += errors
+            self.transient += transient
            self._active += active

    # --- per-slot loop -----------------------------------------------------
    def _loop(self, slot: _Slot):
+        backoff = self.cfg.poll_idle_seconds
        while not slot.stop.is_set() and self._running:
            try:
                jobs = self.client.lease(self.cfg.batch_size)
+                backoff = self.cfg.poll_idle_seconds      # server answered → reset
            except Exception:
-                time.sleep(self.cfg.poll_idle_seconds)
+                # curator unreachable (redeploy, network drop): wait it out with
+                # exponential backoff, capped — resume on our own when it returns.
+                self._interruptible_sleep(slot, backoff)
+                backoff = min(backoff * 2, MAX_BACKOFF_SECONDS)
                continue
            if not jobs:
-                time.sleep(self.cfg.poll_idle_seconds)
+                self._interruptible_sleep(slot, self.cfg.poll_idle_seconds)
                continue
            slot.inflight = [j["job_id"] for j in jobs]
            for job in jobs:
                if slot.stop.is_set() or not self._running:
                    break
-                self._process(job)
+                ok = self._process(job)
                slot.inflight = [i for i in slot.inflight if i != job["job_id"]]
+                if not ok:
+                    # Server went away mid-batch: hand the rest back (best effort)
+                    # and back off instead of hammering a recovering server or
+                    # burning the jobs' attempt budgets on fail().
+                    if slot.inflight:
+                        self.client.release(slot.inflight)
+                        slot.inflight = []
+                    self._interruptible_sleep(slot, backoff)
+                    backoff = min(backoff * 2, MAX_BACKOFF_SECONDS)
+                    break
                if slot.inflight:
                    self.client.heartbeat(slot.inflight)
        # Graceful hand-back of anything leased but not processed.
@@ -114,7 +162,26 @@ class Worker:
            self.client.release(slot.inflight)
            slot.inflight = []

-    def _process(self, job: dict):
+    def _interruptible_sleep(self, slot: _Slot, seconds: float):
+        """Sleep, but wake immediately if the slot is told to stop — so a Stop or
+        a pool-shrink doesn't hang for a full backoff window."""
+        slot.stop.wait(timeout=seconds)
+
+    def _ensure_embedder(self, model_name: str):
+        if self._embedder is not None:
+            return self._embedder
+        with self._embedder_lock:
+            if self._embedder is None:
+                from .embedder import CropEmbedder
+                self._embedder = CropEmbedder(model_name, self.cfg.embed_dtype)
+        return self._embedder
+
+    def _process(self, job: dict) -> bool:
+        """Process one job. Returns True when handled (completed, or hard-failed
+        because the job itself is bad) and False on a TRANSPORT error (curator
+        unreachable / 5xx / our lease was reclaimed mid-flight) — which is not
+        the job's fault, so the caller backs off and the job is left to be
+        re-leased rather than fail()ed into its attempt budget."""
        self._bump(active=1)
        try:
            data = self.client.fetch_image(job["image_url"])
@@ -126,8 +193,31 @@ class Worker:
            else:
                frames = [(None, media.load_image(data))]

+            # task picks what to produce per crop:
+            #   'siglip' (backfill existing images) → concept (SigLIP) regions
+            #     ONLY, so it never churns their figure/CCIP regions or the
+            #     character-reference cache.
+            #   'ccip' / 'both' (a new image's first pass) → figure (CCIP) AND
+            #     concept (SigLIP) in one go, off the same crop.
+            task = job.get("task") or "ccip"
+            want_ccip = task in ("ccip", "both")
+            want_siglip = task in ("ccip", "siglip", "both")
+            replace_kinds = (
+                ["concept"] if task == "siglip" else ["figure", "face", "concept"]
+            )
+
+            embed_version = job.get("embed_version") or DEFAULT_EMBED_VERSION
+            embedder = None
+            if want_siglip:
+                model_name = (
+                    self.cfg.embed_model_override
+                    or job.get("embed_model_name")
+                    or DEFAULT_EMBED_MODEL
+                )
+                embedder = self._ensure_embedder(model_name)
+
            regions = []
-            ev = self.cfg.ccip_model or "ccip-default"
+            ccip_ev = self.cfg.ccip_model or "ccip-default"
            dv = f"person-{self.cfg.detector_level}"
            for t, frame in frames:
                figs = models.detect_figures(frame, self.cfg.detector_level)
@@ -137,20 +227,48 @@ class Worker:
                    crop = crop_region(frame, bbox)
                    if crop is None:
                        continue
-                    vec = models.ccip_vector(crop, self.cfg.ccip_model or None)
-                    regions.append({
-                        "kind": "figure",
-                        "bbox": list(bbox),
-                        "frame_time": t,
-                        "score": score,
-                        "ccip_embedding": vec,
-                        "embedding_version": ev,
-                        "detector_version": dv,
-                    })
-            self.client.submit(job["job_id"], regions, ["figure", "face"])
+                    if want_ccip:
+                        regions.append({
+                            "kind": "figure",
+                            "bbox": list(bbox),
+                            "frame_time": t,
+                            "score": score,
+                            "ccip_embedding": models.ccip_vector(
+                                crop, self.cfg.ccip_model or None
+                            ),
+                            "embedding_version": ccip_ev,
+                            "detector_version": dv,
+                        })
+                    if want_siglip:
+                        regions.append({
+                            "kind": "concept",
+                            "bbox": list(bbox),
+                            "frame_time": t,
+                            "score": score,
+                            "siglip_embedding": embedder.embed(crop),
+                            "embedding_version": embed_version,
+                            "detector_version": dv,
+                        })
+            self.client.submit(job["job_id"], regions, replace_kinds)
            self._bump(processed=1)
-        except Exception as exc:   # noqa: BLE001 — report + move on
+            return True
+        except requests.RequestException as exc:
+            if _is_transient(exc):
+                # curator down/redeploying, a 5xx, or our lease was reclaimed
+                # while we worked. NOT the job's fault — hand it back (best
+                # effort; no-ops if the server is still down, then the server's
+                # orphan-recovery reclaims it) and signal the loop to wait.
+                self._bump(transient=1)
+                self.client.release([job["job_id"]])
+                return False
+            # A job-specific HTTP fault (404 image gone, 400) → fail it so it
+            # doesn't re-lease forever.
            self._bump(errors=1)
            self.client.fail(job["job_id"], str(exc)[:500])
+            return True
+        except Exception as exc:   # noqa: BLE001 — a genuine job fault: report it
+            self._bump(errors=1)
+            self.client.fail(job["job_id"], str(exc)[:500])
+            return True
        finally:
            self._bump(active=-1)
@@ -3,6 +3,10 @@ dghs-imgutils>=0.4
 # GPU inference for the ONNX models. Swap to onnxruntime (CPU) for a slow
 # server-side fallback run.
 onnxruntime-gpu
+# The crop EMBEDDER (concept bag). torch is installed separately in the
+# Dockerfile from the CUDA-12.4 wheel index so the GPU build is deterministic;
+# transformers loads whatever SigLIP-family model the server announces.
+transformers>=4.45
 # Control surface + HTTP.
 fastapi
 uvicorn[standard]
@@ -37,6 +37,15 @@ async def overview():
                .where(ImageRegion.ccip_embedding.is_not(None))
            )
        ).scalar_one()
+        # Concept-crop (SigLIP bag) coverage — how far the back-catalogue embed
+        # has progressed, so the max-over-bag scorer's reach is checkable.
+        images_with_concept_siglip = (
+            await session.execute(
+                select(func.count(distinct(ImageRegion.image_record_id)))
+                .where(ImageRegion.kind == "concept")
+                .where(ImageRegion.siglip_embedding.is_not(None))
+            )
+        ).scalar_one()
        # Per-character reference counts (no vectors loaded) — which characters
        # have enough examples to match on.
        ref_rows = (
@@ -72,6 +81,7 @@ async def overview():
    return jsonify({
        "regions_by_kind": by_kind,
        "images_with_figure_ccip": images_with_figure_ccip,
+        "images_with_concept_siglip": images_with_concept_siglip,
        "characters_with_references": len(ref_rows),
        "character_references": [
            {"tag_id": t, "name": n, "n_refs": c} for (t, n, c) in ref_rows
@@ -17,6 +17,7 @@ from sqlalchemy.dialects.postgresql import insert as pg_insert
 from ..extensions import get_session
 from ..models import AppSetting, GpuJob, ImageRecord, MLSettings
 from ..services.gallery_service import image_url
+from ..services.ml.embedder import MODEL_NAME as EMBED_MODEL_NAME
 from ..services.ml.gpu_jobs import GpuJobService
 from ..services.ml.regions import RegionService

@@ -137,6 +138,12 @@ async def lease():
                # For video/animated: the agent samples at this cadence.
                "frame_interval_seconds": ml.video_frame_interval_seconds,
                "max_frames": ml.video_max_frames,
+                # The embedding model the agent must use for concept crops, so
+                # its region vectors land in the SAME space the heads trained in.
+                # Server-announced → the agent stays model-agnostic; a swap is a
+                # server setting + a re-embed migration, never an agent change.
+                "embed_model_name": EMBED_MODEL_NAME,
+                "embed_version": ml.embedder_model_version,
            })
    return jsonify({"jobs": out})

@@ -126,6 +126,11 @@ def make_celery() -> Celery:
                "schedule": 3600.0,  # auto-feed new images (+ retry errored) so
                "args": ("ccip",),   # the queue keeps moving without the button
            },
+            "enqueue-siglip-backfill-daily": {
+                "task": "backend.app.tasks.ml.enqueue_gpu_backfill",
+                "schedule": 86400.0,  # drain the concept-crop back-catalogue +
+                "args": ("siglip",),  # retry failed embeds, no button needed
+            },
            "ccip-auto-apply-daily": {
                "task": "backend.app.tasks.ml.scheduled_ccip_auto_apply",
                "schedule": 86400.0,  # no-op unless ccip_auto_apply_enabled
@@ -29,6 +29,7 @@ from ...models import (
    HeadAutoApplyRun,
    HeadTrainingRun,
    ImageRecord,
+    ImageRegion,
    MLSettings,
    Tag,
    TagHead,
@@ -296,7 +297,14 @@ async def score_image(
    category, score}], ranked. A concept surfaces when its score clears the
    head's own suggest_threshold — or, when threshold_override is given (the
    typed-dropdown "show everything" mode), that flat floor instead (0 → every
-    head). Empty if the image has no embedding or no heads exist yet."""
+    head). Empty if the image has no embedding or no heads exist yet.
+
+    MAX-OVER-BAG: the image is scored as a BAG of embeddings — the whole-image
+    vector PLUS every concept-region crop the agent embedded (same model
+    version) — and each head takes its MAX score across the bag. A small/local
+    concept (glasses, a stomach bulge) that the whole-image vector washes out
+    can still surface from the crop where it dominates. The whole-image vector is
+    always in the bag, so this can never score lower than whole-image alone."""
    import numpy as np

    img = await session.get(ImageRecord, image_id)
@@ -306,11 +314,26 @@ async def score_image(
    heads = await _current_heads(session, settings.embedder_model_version)
    if heads["W"] is None:
        return []
-    x = np.asarray(img.siglip_embedding, dtype=np.float32)
-    n = float(np.linalg.norm(x)) or 1.0
-    xn = x / n
-    z = heads["W"] @ xn + heads["b"]
-    probs = 1.0 / (1.0 + np.exp(-z))
+
+    bag = [np.asarray(img.siglip_embedding, dtype=np.float32)]
+    region_vecs = (
+        await session.execute(
+            select(ImageRegion.siglip_embedding)
+            .where(ImageRegion.image_record_id == image_id)
+            .where(ImageRegion.siglip_embedding.is_not(None))
+            .where(ImageRegion.embedding_version == settings.embedder_model_version)
+        )
+    ).all()
+    for (vec,) in region_vecs:
+        if vec is not None:
+            bag.append(np.asarray(vec, dtype=np.float32))
+
+    X = np.vstack(bag)                                  # (B, D)
+    norms = np.linalg.norm(X, axis=1, keepdims=True)
+    norms[norms == 0] = 1.0
+    Xn = X / norms
+    Z = Xn @ heads["W"].T + heads["b"]                  # (B, H)
+    probs = (1.0 / (1.0 + np.exp(-Z))).max(axis=0)      # (H,) best over the bag
    out = []
    for i, p in enumerate(probs):
        cut = threshold_override if threshold_override is not None else heads["thr"][i]
@@ -742,24 +742,43 @@ def scheduled_apply_head_tags() -> str:

@celery.task(name="backend.app.tasks.ml.enqueue_gpu_backfill")
 def enqueue_gpu_backfill(task_name: str) -> int:
-    """Enqueue a gpu_job for every image that doesn't already have one for
-    `task_name` (one INSERT…SELECT, so it scales to a full library). The desktop
-    agent drains the queue over HTTP. Returns the number enqueued."""
+    """Enqueue a gpu_job for every image that still needs `task_name` (one
+    INSERT…SELECT, so it scales to a full library). The desktop agent drains the
+    queue over HTTP. Returns the number enqueued.
+
+    'siglip' gates on the RESULT (no concept region yet) rather than on a prior
+    job, so it picks up the back-catalogue of images that were CCIP-embedded
+    before concept crops existed, and retries images whose concept embed failed —
+    without re-touching their figure/CCIP regions."""
    from sqlalchemy import exists, insert, literal
    from sqlalchemy import select as sa_select

-    from ..models import GpuJob, ImageRecord
+    from ..models import GpuJob, ImageRecord, ImageRegion

    SessionLocal = _sync_session_factory()
    with SessionLocal() as session:
-        already = exists().where(
-            GpuJob.image_record_id == ImageRecord.id,
-            GpuJob.task == task_name,
-            GpuJob.status.in_(["pending", "leased", "done"]),
-        )
-        sel = sa_select(
-            ImageRecord.id, literal(task_name), literal("pending")
-        ).where(~already)
+        if task_name == "siglip":
+            has_concept = exists().where(
+                ImageRegion.image_record_id == ImageRecord.id,
+                ImageRegion.kind == "concept",
+            )
+            queued = exists().where(
+                GpuJob.image_record_id == ImageRecord.id,
+                GpuJob.task == "siglip",
+                GpuJob.status.in_(["pending", "leased"]),
+            )
+            sel = sa_select(
+                ImageRecord.id, literal("siglip"), literal("pending")
+            ).where(~has_concept).where(~queued)
+        else:
+            already = exists().where(
+                GpuJob.image_record_id == ImageRecord.id,
+                GpuJob.task == task_name,
+                GpuJob.status.in_(["pending", "leased", "done"]),
+            )
+            sel = sa_select(
+                ImageRecord.id, literal(task_name), literal("pending")
+            ).where(~already)
        # RETURNING + count: result.rowcount is unreliable for INSERT…SELECT.
        rows = session.execute(
            insert(GpuJob)
@@ -61,6 +61,16 @@
      processes until the agent is running.
    </p>

+    <v-btn
+      class="mt-3" color="accent" variant="tonal" rounded="pill" size="small"
+      prepend-icon="mdi-crop" :loading="backfillingSiglip" @click="onBackfillSiglip"
+    >Queue concept crops (SigLIP)</v-btn>
+    <p class="fc-muted text-caption mt-2 mb-0">
+      Enqueues every image that doesn't have concept-crop embeddings yet — the
+      localized vectors that help small/local tags (glasses, etc.) surface. New
+      images get these automatically; this catches the back-catalogue.
+    </p>
+
    <!-- Match strictness -->
    <div class="fc-section-h mt-5 mb-1">Character-match strictness</div>
    <div v-if="ml.settings" class="d-flex align-center" style="gap:12px">
@@ -115,6 +125,7 @@ const tokenValue = ref(null)
 const masked = ref(true)
 const rotating = ref(false)
 const backfilling = ref(false)
+const backfillingSiglip = ref(false)
 const threshold = ref(0.85)
 const savingThreshold = ref(false)
 const autoApply = ref(true)
@@ -215,6 +226,19 @@ async function onBackfill() {
    backfilling.value = false
  }
 }
+
+async function onBackfillSiglip() {
+  backfillingSiglip.value = true
+  try {
+    await store.backfill('siglip')
+    toast({ text: 'Queued concept crops — run the agent to process them', type: 'success' })
+    await refreshQueue()
+  } catch (e) {
+    toast({ text: `Could not queue backfill: ${e.message}`, type: 'error' })
+  } finally {
+    backfillingSiglip.value = false
+  }
+}
 </script>

 <style scoped>
@@ -2,9 +2,9 @@
 from datetime import UTC, datetime, timedelta

 import pytest
-from sqlalchemy import select
+from sqlalchemy import func, select

-from backend.app.models import GpuJob, ImageRecord
+from backend.app.models import GpuJob, ImageRecord, ImageRegion
 from backend.app.services.ml.gpu_jobs import GpuJobService

 pytestmark = pytest.mark.integration
@@ -20,6 +20,43 @@ async def _img(db, sha) -> ImageRecord:
    return img


+@pytest.mark.asyncio
+async def test_enqueue_siglip_backfill_gates_on_concept_region(db):
+    # 'siglip' backfill enqueues images that lack a concept region (the
+    # back-catalogue) and skips ones that already have one — and never double-
+    # enqueues an image that already has a pending siglip job.
+    from backend.app.tasks.ml import enqueue_gpu_backfill
+
+    need = await _img(db, "e1" * 32)          # no concept region → wants one
+    have = await _img(db, "e2" * 32)          # already embedded → skip
+    db.add(ImageRegion(
+        image_record_id=have.id, kind="concept", rx=0.0, ry=0.0, rw=1.0, rh=1.0,
+        siglip_embedding=[0.0] * 1152, embedding_version="siglip-test",
+    ))
+    await db.commit()
+
+    assert enqueue_gpu_backfill("siglip") >= 1
+
+    queued = {
+        j.image_record_id for j in (
+            await db.execute(select(GpuJob).where(GpuJob.task == "siglip"))
+        ).scalars()
+    }
+    assert need.id in queued
+    assert have.id not in queued
+
+    # Idempotent: the now-pending job means a second run doesn't re-enqueue it.
+    enqueue_gpu_backfill("siglip")
+    n_for_need = (
+        await db.execute(
+            select(func.count()).select_from(GpuJob).where(
+                GpuJob.task == "siglip", GpuJob.image_record_id == need.id
+            )
+        )
+    ).scalar_one()
+    assert n_for_need == 1
+
+
@pytest.mark.asyncio
 async def test_enqueue_dedupes_same_pair(db):
    img = await _img(db, "a" * 64)
@@ -111,6 +111,40 @@ async def test_threshold_override_surfaces_below_cut(db):
    assert any(s.canonical_tag_id == tag.id for s in flooded.by_category["general"])


+@pytest.mark.asyncio
+async def test_concept_region_surfaces_via_max_over_bag(db):
+    # Max-over-bag: the whole-image vector is orthogonal to the head (scores the
+    # 0.5 midpoint, under a 0.7 cut → nothing), but a concept CROP that aligns
+    # with the head lifts the max over the bag above the cut. A small/local
+    # concept surfaces ONLY because of the crop.
+    tag = await TagService(db).find_or_create("glasses", TagKind.general)
+    img = await _img(db, "b1" * 32, _emb(5))      # whole-image ⟂ head
+    await _head(db, tag.id, slot=0, suggest_threshold=0.7)
+    await db.commit()
+    # Whole-image alone: sigmoid(0)=0.5 < 0.7 → no suggestion.
+    assert not (await SuggestionService(db).for_image(img.id)).by_category.get("general")
+
+    # A concept crop aligned with the head, but stamped with a STALE model
+    # version → filtered out of the bag, so still nothing.
+    db.add(ImageRegion(
+        image_record_id=img.id, kind="concept",
+        rx=0.1, ry=0.1, rw=0.3, rh=0.3,
+        siglip_embedding=_emb(0), embedding_version="stale-embedder-v0",
+    ))
+    await db.commit()
+    assert not (await SuggestionService(db).for_image(img.id)).by_category.get("general")
+
+    # A matching-version concept crop → max-over-bag lifts it over the cut.
+    db.add(ImageRegion(
+        image_record_id=img.id, kind="concept",
+        rx=0.4, ry=0.4, rw=0.3, rh=0.3,
+        siglip_embedding=_emb(0), embedding_version=await _embver(db),
+    ))
+    await db.commit()
+    general = (await SuggestionService(db).for_image(img.id)).by_category["general"]
+    assert any(s.canonical_tag_id == tag.id and s.score > 0.7 for s in general)
+
+
@pytest.mark.asyncio
 async def test_rejected_tag_surfaced_flagged_then_reversible(db):
    # A dismissed suggestion is NOT dropped: it stays flagged rejected so the