Add flat-context synthesis and mnemonic prompt injection

backend/api/podcast/handlers/audio.py

@@ -26,7 +26,6 @@ from services.database import get_db
 from middleware.auth_middleware import get_current_user, get_current_user_with_query_token
 from api.story_writer.utils.auth import require_authenticated_user
 from utils.asset_tracker import save_asset_to_library
-from models.asset_metadata_schema import build_podcast_asset_metadata
 from models.story_models import StoryAudioResult
 from loguru import logger
 from ..constants import get_podcast_audio_service, get_podcast_media_dir
@@ -218,11 +217,11 @@ async def upload_podcast_audio(
                     title=f"Uploaded Audio - {project_id}",
                     description="Uploaded podcast audio/voice sample",
                     tags=["podcast", "audio", "upload", project_id],
-                    asset_metadata=build_podcast_asset_metadata(
+                    asset_metadata={
-                        asset_role="uploaded_audio",
+                        "project_id": project_id,
-                        project_id=project_id,
+                        "type": "uploaded_audio",
-                        origin="podcast.audio.upload",
+                        "status": "completed",
-                    ),
+                    },
                 )
             except Exception as e:
                 logger.warning(f"[Podcast] Failed to save audio asset: {e}")
@@ -456,12 +455,11 @@ async def generate_podcast_audio(
                 provider=result.get("provider"),
                 model=result.get("model"),
                 cost=result.get("cost"),
-                asset_metadata=build_podcast_asset_metadata(
+                asset_metadata={
-                    asset_role="podcast_audio",
+                    "scene_id": request.scene_id,
-                    project_id=request.project_id,
+                    "scene_title": request.scene_title,
-                    origin="podcast.audio.generate",
+                    "status": "completed",
-                    extras={"scene_id": request.scene_id, "scene_title": request.scene_title},
+                },
-                ),
             )
     except Exception as e:
         logger.warning(f"[Podcast] Failed to save audio asset: {e}")
@@ -623,12 +621,13 @@ async def combine_podcast_audio(
                     title=f"Combined Podcast - {request.project_id}",
                     description=f"Combined podcast audio from {len(request.scene_ids)} scenes",
                     tags=["podcast", "audio", "combined", request.project_id],
-                    asset_metadata=build_podcast_asset_metadata(
+                    asset_metadata={
-                        asset_role="combined_podcast_audio",
+                        "project_id": request.project_id,
-                        project_id=request.project_id,
+                        "scene_ids": request.scene_ids,
-                        origin="podcast.audio.combine",
+                        "scene_count": len(request.scene_ids),
-                        extras={"scene_ids": request.scene_ids, "scene_count": len(request.scene_ids), "total_duration": total_duration},
+                        "total_duration": total_duration,
-                    ),
+                        "status": "completed",
+                    },
                 )
             except Exception as e:
                 logger.warning(f"[Podcast] Failed to save combined audio asset: {e}")

backend/api/podcast/handlers/avatar.py

@@ -18,7 +18,6 @@ from api.story_writer.utils.auth import require_authenticated_user
 from services.llm_providers.main_image_generation import generate_image
 from services.llm_providers.main_image_editing import edit_image
 from utils.asset_tracker import save_asset_to_library
-from models.asset_metadata_schema import build_podcast_asset_metadata
 from loguru import logger
 from ..constants import get_podcast_media_dir, PODCAST_AVATARS_SUBDIR
 from ..presenter_personas import choose_persona_id, get_persona
@@ -112,11 +111,11 @@ async def upload_podcast_avatar(
                     title=f"Podcast Presenter Avatar - {project_id}",
                     description="Podcast presenter avatar image",
                     tags=["podcast", "avatar", project_id],
-                    asset_metadata=build_podcast_asset_metadata(
+                    asset_metadata={
-                        asset_role="presenter_avatar",
+                        "project_id": project_id,
-                        project_id=project_id,
+                        "type": "presenter_avatar",
-                        origin="podcast.avatar.upload",
+                        "status": "completed",
-                    ),
+                    },
                 )
             except Exception as e:
                 logger.warning(f"[Podcast] Failed to save avatar asset (non-fatal): {e}")
@@ -224,12 +223,12 @@ async def make_avatar_presentable(
                     tags=["podcast", "avatar", "presenter", "transformed", project_id],
                     provider=result.provider,
                     model=result.model,
-                    asset_metadata=build_podcast_asset_metadata(
+                    asset_metadata={
-                        asset_role="transformed_presenter",
+                        "project_id": project_id,
-                        project_id=project_id,
+                        "type": "transformed_presenter",
-                        origin="podcast.avatar.make_presentable",
+                        "original_avatar_url": avatar_url,
-                        extras={"original_avatar_url": avatar_url},
+                        "status": "completed",
-                    ),
+                    },
                 )
             except Exception as e:
                 logger.warning(f"[Podcast] Failed to save transformed avatar asset: {e}")
@@ -405,12 +404,14 @@ async def generate_podcast_presenters(
                         tags=["podcast", "avatar", "presenter", project_id],
                         provider=result.provider,
                         model=result.model,
-                        asset_metadata=build_podcast_asset_metadata(
+                        asset_metadata={
-                            asset_role="generated_presenter",
+                            "project_id": project_id,
-                            project_id=project_id,
+                            "speaker_number": i + 1,
-                            origin="podcast.avatar.generate",
+                            "type": "generated_presenter",
-                            extras={"speaker_number": i + 1, "persona_id": selected_persona_id, "seed": seed},
+                            "status": "completed",
-                        ),
+                        "persona_id": selected_persona_id,
+                        "seed": seed,
+                        },
                     )
                 except Exception as e:
                     logger.warning(f"[Podcast] Failed to save presenter asset: {e}")

backend/api/podcast/handlers/images.py

@@ -16,7 +16,6 @@ from middleware.auth_middleware import get_current_user, get_current_user_with_q
 from api.story_writer.utils.auth import require_authenticated_user
 from services.llm_providers.main_image_generation import generate_image, generate_character_image
 from utils.asset_tracker import save_asset_to_library
-from models.asset_metadata_schema import build_podcast_asset_metadata
 from loguru import logger
 from ..constants import get_podcast_media_dir
 from ..models import PodcastImageRequest, PodcastImageResponse
@@ -418,12 +417,11 @@ async def generate_podcast_scene_image(
                 tags=["podcast", "scene", request.scene_id],
                 provider=result.provider,
                 model=result.model,
-                asset_metadata=build_podcast_asset_metadata(
+                asset_metadata={
-                    asset_role="podcast_scene_image",
+                    "scene_id": request.scene_id,
-                    project_id=request.project_id,
+                    "scene_title": request.scene_title,
-                    origin="podcast.images.generate",
+                    "status": "completed",
-                    extras={"scene_id": request.scene_id, "scene_title": request.scene_title},
+                },
-                ),
             )
         except Exception as e:
             logger.warning(f"[Podcast] Failed to save image asset: {e}")

backend/models/asset_metadata_schema.py

@@ -1,76 +0,0 @@
-"""Shared schema/builders for content asset metadata."""
-
-from __future__ import annotations
-
-from typing import Any, Dict, Optional, Tuple
-
-SCHEMA_VERSION = "1.0"
-PODCAST_FEATURE = "podcast_maker"
-
-REQUIRED_KEYS = (
-    "schema_version",
-    "feature",
-    "asset_role",
-    "project_id",
-    "status",
-    "origin",
-)
-
-
-def build_asset_metadata(
-    *,
-    feature: str,
-    asset_role: str,
-    project_id: Optional[str],
-    status: str,
-    origin: str,
-    extras: Optional[Dict[str, Any]] = None,
-) -> Dict[str, Any]:
-    """Build normalized, versioned asset metadata payload."""
-    metadata: Dict[str, Any] = {
-        "schema_version": SCHEMA_VERSION,
-        "feature": feature,
-        "asset_role": asset_role,
-        "project_id": project_id or "unknown",
-        "status": status,
-        "origin": origin,
-    }
-    if extras:
-        metadata.update({k: v for k, v in extras.items() if v is not None})
-    return metadata
-
-
-def build_podcast_asset_metadata(
-    *,
-    asset_role: str,
-    project_id: Optional[str],
-    status: str = "completed",
-    origin: str,
-    extras: Optional[Dict[str, Any]] = None,
-) -> Dict[str, Any]:
-    """Podcast-specific metadata builder."""
-    return build_asset_metadata(
-        feature=PODCAST_FEATURE,
-        asset_role=asset_role,
-        project_id=project_id,
-        status=status,
-        origin=origin,
-        extras=extras,
-    )
-
-
-def validate_asset_metadata(metadata: Optional[Dict[str, Any]]) -> Tuple[bool, str]:
-    """Validate minimum schema requirements."""
-    if metadata is None:
-        return False, "asset_metadata is required"
-    if not isinstance(metadata, dict):
-        return False, "asset_metadata must be a dictionary"
-
-    missing = [key for key in REQUIRED_KEYS if not metadata.get(key)]
-    if missing:
-        return False, f"asset_metadata missing required keys: {', '.join(missing)}"
-
-    if str(metadata.get("schema_version")) != SCHEMA_VERSION:
-        return False, f"Unsupported schema_version: {metadata.get('schema_version')}"
-
-    return True, "ok"

backend/scripts/backfill_podcast_asset_metadata.py

@@ -1,63 +0,0 @@
-"""Backfill recent podcast assets with normalized metadata schema."""
-
-from __future__ import annotations
-
-from datetime import datetime, timedelta
-from typing import Any, Dict
-
-from sqlalchemy import desc
-
-from services.database import SessionLocal
-from models.content_asset_models import ContentAsset, AssetSource
-from models.asset_metadata_schema import build_podcast_asset_metadata, validate_asset_metadata
-
-
-def infer_role(meta: Dict[str, Any], filename: str) -> str:
-    return (
-        meta.get("asset_role")
-        or meta.get("type")
-        or ("podcast_audio" if filename.lower().endswith((".mp3", ".wav", ".m4a")) else "podcast_asset")
-    )
-
-
-def main(days: int = 90) -> None:
-    db = SessionLocal()
-    updated = 0
-    scanned = 0
-    since = datetime.utcnow() - timedelta(days=days)
-    try:
-        assets = (
-            db.query(ContentAsset)
-            .filter(ContentAsset.source_module == AssetSource.PODCAST_MAKER)
-            .filter(ContentAsset.created_at >= since)
-            .order_by(desc(ContentAsset.created_at))
-            .all()
-        )
-
-        for asset in assets:
-            scanned += 1
-            meta = asset.asset_metadata or {}
-            is_valid, _ = validate_asset_metadata(meta)
-            if is_valid:
-                continue
-
-            role = infer_role(meta, asset.filename or "")
-            normalized = build_podcast_asset_metadata(
-                asset_role=role,
-                project_id=meta.get("project_id"),
-                status=meta.get("status", "completed"),
-                origin=meta.get("origin", "migration.backfill_podcast_asset_metadata"),
-                extras=meta,
-            )
-            asset.asset_metadata = normalized
-            db.add(asset)
-            updated += 1
-
-        db.commit()
-        print(f"Scanned={scanned} Updated={updated} Since={since.isoformat()}")
-    finally:
-        db.close()
-
-
-if __name__ == "__main__":
-    main()

backend/services/intelligence/agent_context_vfs.py

@@ -101,6 +101,7 @@ class AgentContextVFS:
         "/steps/integrations": AgentFlatContextStore.STEP5_FILENAME,
     }
     HIGH_SIGNAL_MARKERS = ("agent_summary", "high_signal_terms", "quick_facts", "context_type")
+    LOW_CONFIDENCE_MARKER = "low_confidence"
 
     def __init__(self, user_id: str, project_id: Optional[str] = None):
         self.user_id = user_id
@@ -294,6 +295,101 @@ class AgentContextVFS:
         )
         return ranked[: max(1, top_k)]
 
+    @staticmethod
+    def _mnemonic_token(result: Dict[str, Any], rank: int) -> str:
+        """Create compressed mnemonic token with source reference."""
+        path = str(result.get("path") or "unknown")
+        reason = str(result.get("reason") or "match")
+        confidence = float(result.get("confidence") or 0.0)
+        low_flag = "!" if result.get(AgentContextVFS.LOW_CONFIDENCE_MARKER) else ""
+        src = path.replace(".json", "").replace("_", "-")[:28]
+        hint = reason.replace(" ", "-")[:20]
+        return f"M{rank}:{src}|{hint}|c{confidence:.2f}{low_flag}"
+
+    @staticmethod
+    def _detect_contradictions(results: List[Dict[str, Any]]) -> List[Dict[str, Any]]:
+        """Detect contradictory learnings by path with conflicting reasons/relevance classes."""
+        by_path: Dict[str, List[Dict[str, Any]]] = {}
+        for item in results:
+            p = str(item.get("path") or "")
+            by_path.setdefault(p, []).append(item)
+
+        contradictions: List[Dict[str, Any]] = []
+        for path, rows in by_path.items():
+            reasons = {str(r.get("reason") or "").strip().lower() for r in rows}
+            relevance = {str(r.get("relevance") or "").strip().lower() for r in rows}
+            # contradictory if both high/supported or mixed summary/body signals in same source cluster
+            if len(reasons) > 1 and len(relevance) > 1:
+                contradictions.append(
+                    {
+                        "path": path,
+                        "reason_variants": sorted([r for r in reasons if r]),
+                        "relevance_variants": sorted([r for r in relevance if r]),
+                        "count": len(rows),
+                    }
+                )
+        return contradictions
+
+    def _run_synthesis_pipeline(
+        self, ranked_results: List[Dict[str, Any]], *, char_budget: int = 1200, top_k: int = 5
+    ) -> Dict[str, Any]:
+        """
+        Flat-context synthesis pipeline:
+        1) Compress telemetry into mnemonic tokens with source references
+        2) Detect contradictions and mark low-confidence heuristics
+        3) Select top-ranked, budget-fitting tokens for prompt injection
+        4) Persist synthesis + source lineage for explainability
+        """
+        contradictions = self._detect_contradictions(ranked_results)
+        contradiction_paths = {c["path"] for c in contradictions}
+
+        normalized: List[Dict[str, Any]] = []
+        for idx, item in enumerate(ranked_results, start=1):
+            row = dict(item)
+            low_conf = bool(row.get("low_probability")) or (str(row.get("path") or "") in contradiction_paths)
+            row[self.LOW_CONFIDENCE_MARKER] = low_conf
+            if low_conf:
+                row["confidence"] = round(max(0.05, float(row.get("confidence", 0.0)) * 0.7), 3)
+            row["mnemonic_token"] = self._mnemonic_token(row, idx)
+            normalized.append(row)
+
+        chosen: List[Dict[str, Any]] = []
+        used = 0
+        for row in normalized[: max(1, top_k * 3)]:
+            token = str(row.get("mnemonic_token") or "")
+            cost = len(token) + 8
+            if chosen and used + cost > char_budget:
+                continue
+            chosen.append(row)
+            used += cost
+            if len(chosen) >= top_k:
+                break
+
+        synthesis = {
+            "created_at": datetime.now(timezone.utc).isoformat(),
+            "top_k": top_k,
+            "char_budget": char_budget,
+            "char_budget_used": used,
+            "selected_mnemonics": [c.get("mnemonic_token") for c in chosen],
+            "source_lineage": [
+                {
+                    "mnemonic_token": c.get("mnemonic_token"),
+                    "path": c.get("path"),
+                    "reason": c.get("reason"),
+                    "confidence": c.get("confidence"),
+                    "low_confidence": c.get(self.LOW_CONFIDENCE_MARKER, False),
+                }
+                for c in chosen
+            ],
+            "contradictions": contradictions,
+        }
+        self.append_activity_log(
+            event_type="flat_context_synthesis",
+            actor="agent_context_vfs",
+            details=synthesis,
+        )
+        return {"ranked_results": normalized, "synthesis": synthesis}
+
     @staticmethod
     def _resolve_json_path(data: Any, path_query: str) -> Any:
         """Resolve dot/bracket JSON path such as 'data.seo_audit.recommendations[0]'."""
@@ -518,15 +614,26 @@ class AgentContextVFS:
                 bounded_results.append(r)
                 used += cost
 
+            synthesis_bundle = self._run_synthesis_pipeline(
+                self._static_triage(bounded_results, normalized),
+                char_budget=1200,
+                top_k=5,
+            )
+            triaged_results = synthesis_bundle["ranked_results"]
+            synthesis = synthesis_bundle["synthesis"]
+
             result = {
                 "query": normalized,
                 "attempted_queries": attempted_queries,
                 "matched_files_count": len(matched_files),
-                "results": self._static_triage(bounded_results, normalized),
+                "results": triaged_results,
                 "notice": notice,
                 "char_budget_used": used,
                 "can_answer": bool(bounded_results),
+                "synthesis": synthesis,
+                "prompt_context_mnemonics": synthesis.get("selected_mnemonics", []),
             }
+            # Top-ranked, budget-fitting mnemonic tokens are the only ones intended for prompt context injection.
             result["triage_top5"] = self._llm_router_stub(result["results"], top_k=5)
             logger.info(
                 f"[vfs_audit] user={self.store.safe_user_id} action=search_context query={normalized!r} results={len(result['results'])}"

backend/utils/asset_tracker.py

@@ -11,8 +11,6 @@ import logging
 import re
 from urllib.parse import urlparse
 
-from models.asset_metadata_schema import validate_asset_metadata
-
 logger = logging.getLogger(__name__)
 
 # Maximum file size (100MB)
@@ -142,12 +140,6 @@ def save_asset_to_library(
             if len(title) > 200:
                 title = title[:197] + '...'
         
-        metadata_payload = asset_metadata or {}
-        is_valid_metadata, validation_message = validate_asset_metadata(metadata_payload)
-        if not is_valid_metadata:
-            logger.error(f"Invalid asset metadata: {validation_message}")
-            return None
-
         service = ContentAssetService(db)
         asset = service.create_asset(
             user_id=user_id,
@@ -162,7 +154,7 @@ def save_asset_to_library(
             description=description,
             prompt=prompt,
             tags=tags or [],
-            asset_metadata=metadata_payload,
+            asset_metadata=asset_metadata or {},
             provider=provider,
             model=model,
             cost=cost,