diff --git a/.superpowers/sdd/evidence-task-5-report.md b/.superpowers/sdd/evidence-task-5-report.md
index ad45c3de..e778b59d 100644
--- a/.superpowers/sdd/evidence-task-5-report.md
+++ b/.superpowers/sdd/evidence-task-5-report.md
@@ -59,3 +59,24 @@ Live pgvector integration needs Docker or an authorized local pgvector endpoint.
 strategy is logical isolation rather than destructive cleanup because the shared `VectorStore`
 port intentionally exposes no delete/transaction API; unreachable failed generations can be
 garbage-collected by a future maintenance job.
+
+## Review integration wave
+
+Added an enforceable `metadata_filter` vector-port contract and capability flags. Direct pgvector
+places exact Evidence generation/document predicates in SQL before `LIMIT`; HTTP sends the same
+filter to the RPC and deliberately does not use the legacy 404 fallback. The reader RPC script now
+validates and applies that filter. Normal Evidence search and search-pack use an ACTIVE-aware
+searcher that groups active documents by generation, executes complete server-filtered searches,
+and merges the results.
+
+Added exact-generation Evidence cleanup to direct and HTTP writers plus the allowlisted writer RPC.
+Pipeline failures compensate both staged filesystem state and vector writes; cleanup failures stay
+sanitized and ACTIVE filtering remains the exposure boundary. Corpus-present session artifact
+resolution now fails closed on corrupt/missing ACTIVE rather than falling through to source files.
+
+Focused review-wave verification: 45 passed, scoped Ruff clean. A mocked REST regression proves
+the exact filter payload and fail-closed legacy 404 behavior.
+
+Still outstanding from the expanded review request: Task-4 JobRunner stage-by-stage integration,
+published-generation retention/garbage collection, same-fd `dirfd` materialized-file reads, and
+live local pgvector integration could not be completed in this wave.
diff --git a/harness/scripts/create_vector_reader_rpc.sql b/harness/scripts/create_vector_reader_rpc.sql
index 913e3b4c..43c4ba31 100644
--- a/harness/scripts/create_vector_reader_rpc.sql
+++ b/harness/scripts/create_vector_reader_rpc.sql
@@ -28,7 +28,9 @@ $$;
 create or replace function public.search_similar(
   table_name text,
   query_embedding vector,
-  limit_count integer
+  limit_count integer,
+  kinds text[] default null,
+  metadata_filter jsonb default null
 )
 returns table(id bigint, similarity real, metadata jsonb)
 language plpgsql
@@ -37,15 +39,31 @@ set search_path = public, vectors, extensions
 as $$
 begin
   perform public._assert_vector_read_table(table_name);
+  if metadata_filter is not null and (
+    table_name <> 'evidence'
+    or not (metadata_filter ? 'vector_generation')
+    or not (metadata_filter ? 'document_ids')
+    or jsonb_object_length(metadata_filter) <> 2
+    or jsonb_typeof(metadata_filter->'document_ids') <> 'array'
+  ) then
+    raise exception 'invalid Evidence metadata filter';
+  end if;
   return query execute format(
     'select t.id,
             (1 - (t.embedding <=> $1))::real as similarity,
             t.metadata
      from vectors.%I t
+     where ($3 is null or t.kind = any ($3))
+       and ($4 is null or (
+         t.metadata->>''vector_generation'' = $4->>''vector_generation''
+         and t.metadata->>''document_id'' in (
+           select jsonb_array_elements_text($4->''document_ids'')
+         )
+       ))
      order by t.embedding <=> $1
      limit $2',
     table_name
-  ) using query_embedding, limit_count;
+  ) using query_embedding, limit_count, kinds, metadata_filter;
 end;
 $$;
 
@@ -75,7 +93,7 @@ end;
 $$;
 
 revoke all on function public._assert_vector_read_table(text) from public;
-revoke all on function public.search_similar(text, vector, integer) from public;
+revoke all on function public.search_similar(text, vector, integer, text[], jsonb) from public;
 revoke all on function public.list_tables() from public;
 
 -- Revoca dai ruoli client generici, poi abilita solo il reader dedicato
@@ -83,15 +101,16 @@ revoke all on function public.list_tables() from public;
 do $$
 begin
   if exists (select 1 from pg_roles where rolname = 'anon') then
-    revoke all on function public.search_similar(text, vector, integer) from anon;
+    revoke all on function public.search_similar(text, vector, integer, text[], jsonb) from anon;
     revoke all on function public.list_tables() from anon;
   end if;
   if exists (select 1 from pg_roles where rolname = 'authenticated') then
-    revoke all on function public.search_similar(text, vector, integer) from authenticated;
+    revoke all on function public.search_similar(text, vector, integer, text[], jsonb) from authenticated;
     revoke all on function public.list_tables() from authenticated;
   end if;
   if exists (select 1 from pg_roles where rolname = 'vector_reader') then
-    grant execute on function public.search_similar(text, vector, integer) to vector_reader;
+    grant execute on function public.search_similar(text, vector, integer, text[], jsonb)
+      to vector_reader;
     grant execute on function public.list_tables() to vector_reader;
   end if;
 end $$;
diff --git a/harness/scripts/create_vector_writer_rpc.sql b/harness/scripts/create_vector_writer_rpc.sql
index 51a1aea5..1fe7d11a 100644
--- a/harness/scripts/create_vector_writer_rpc.sql
+++ b/harness/scripts/create_vector_writer_rpc.sql
@@ -101,9 +101,30 @@ begin
 end;
 $$;
 
+create or replace function public.delete_vector_generation(
+  table_name text, kind text, generation text
+)
+returns jsonb
+language plpgsql
+security definer
+set search_path = public, vectors, extensions
+as $$
+declare affected integer;
+begin
+  if table_name <> 'evidence' or kind <> 'evidence' or generation !~ '^gen:[0-9a-f]{32}$' then
+    raise exception 'only an exact Evidence generation may be deleted';
+  end if;
+  delete from vectors.evidence e
+   where e.kind = 'evidence' and e.metadata->>'vector_generation' = generation;
+  get diagnostics affected = row_count;
+  return jsonb_build_object('deleted', affected);
+end;
+$$;
+
 revoke all on function public._assert_vector_write_table(text, text[]) from public;
 revoke all on function public.existing_vector_hashes(text, text[]) from public;
 revoke all on function public.upsert_vector_records(text, jsonb) from public;
+revoke all on function public.delete_vector_generation(text, text, text) from public;
 
 -- Su alcuni progetti Supabase le funzioni in `public` ricevono grant automatici: revoca
 -- esplicitamente dai ruoli client generici, poi abilita solo il writer dedicato.
@@ -112,14 +133,17 @@ begin
   if exists (select 1 from pg_roles where rolname = 'anon') then
     revoke all on function public.existing_vector_hashes(text, text[]) from anon;
     revoke all on function public.upsert_vector_records(text, jsonb) from anon;
+    revoke all on function public.delete_vector_generation(text, text, text) from anon;
   end if;
   if exists (select 1 from pg_roles where rolname = 'authenticated') then
     revoke all on function public.existing_vector_hashes(text, text[]) from authenticated;
     revoke all on function public.upsert_vector_records(text, jsonb) from authenticated;
+    revoke all on function public.delete_vector_generation(text, text, text) from authenticated;
   end if;
   if exists (select 1 from pg_roles where rolname = 'vector_writer') then
     grant execute on function public.existing_vector_hashes(text, text[]) to vector_writer;
     grant execute on function public.upsert_vector_records(text, jsonb) to vector_writer;
+    grant execute on function public.delete_vector_generation(text, text, text) to vector_writer;
   end if;
 end $$;
 
diff --git a/harness/tests/test_search_similar_kinds.py b/harness/tests/test_search_similar_kinds.py
index 5a16be0a..049d9519 100644
--- a/harness/tests/test_search_similar_kinds.py
+++ b/harness/tests/test_search_similar_kinds.py
@@ -90,6 +90,25 @@ def test_search_similar_reraises_non_404_with_kinds(monkeypatch):
         _client().search_similar("memory", [0.1] * 4, 5, kinds=["memory"])
 
 
+def test_generation_filter_is_sent_exactly_and_legacy_404_fails_closed(monkeypatch):
+    calls = []
+
+    def fake_call(self, function, payload):
+        calls.append(payload)
+        raise VectorRestError("HTTP 404 missing filtered RPC")
+
+    monkeypatch.setattr(VectorRestClient, "_call", fake_call)
+    metadata_filter = {"vector_generation": "gen:abc", "document_ids": ["doc:1"]}
+    with pytest.raises(VectorRestError, match="404"):
+        _client().search_similar(
+            "evidence", [0.1] * 4, 5, kinds=["evidence"], metadata_filter=metadata_filter
+        )
+    assert calls == [{
+        "query_embedding": [0.1] * 4, "limit_count": 5, "table_name": "evidence",
+        "kinds": ["evidence"], "metadata_filter": metadata_filter,
+    }]
+
+
 def test_rest_searcher_forwards_kinds_to_client():
     calls = []
 
diff --git a/harness/tht/adapters/vector/legacy_direct.py b/harness/tht/adapters/vector/legacy_direct.py
index bdec704c..c14202f3 100644
--- a/harness/tht/adapters/vector/legacy_direct.py
+++ b/harness/tht/adapters/vector/legacy_direct.py
@@ -5,6 +5,7 @@ from sqlalchemy import Engine
 from tht.ports.vector import (
     VectorCapabilities,
     VectorHealth,
+    VectorStoreError,
     VectorWriteRecord,
     VectorWriteUnavailable,
     require_positive_limit,
@@ -49,8 +50,11 @@ class LegacyDirectVectorStore:
         *,
         limit: int,
         kinds: list[str] | None = None,
+        metadata_filter: dict[str, object] | None = None,
     ) -> list[VectorHit]:
         require_positive_limit(limit)
+        if metadata_filter is not None:
+            raise VectorStoreError("Legacy vector store cannot enforce metadata filtering")
         hits: list[VectorHit] = []
         for collection in collections:
             table = TableVectorStore(
diff --git a/harness/tht/adapters/vector/pgvector.py b/harness/tht/adapters/vector/pgvector.py
index e9980c28..1b1f9970 100644
--- a/harness/tht/adapters/vector/pgvector.py
+++ b/harness/tht/adapters/vector/pgvector.py
@@ -85,6 +85,8 @@ class PgVectorStore:
             search=self._reader is not None,
             existing_hashes=writable,
             upsert=writable,
+            metadata_filter=self._reader is not None,
+            delete_generation=writable,
         )
 
     def _probe(
@@ -242,6 +244,7 @@ class PgVectorStore:
         *,
         limit: int,
         kinds: list[str] | None = None,
+        metadata_filter: dict[str, object] | None = None,
     ) -> list[VectorHit]:
         require_positive_limit(limit)
         if self._reader is None:
@@ -262,7 +265,27 @@ class PgVectorStore:
                     )
                     if kinds and not collection_kinds:
                         continue
-                    where = sql.SQL(" WHERE kind = ANY(%s)") if collection_kinds else sql.SQL("")
+                    clauses = []
+                    filter_params = []
+                    if collection_kinds:
+                        clauses.append(sql.SQL("kind = ANY(%s)"))
+                        filter_params.append(collection_kinds)
+                    if metadata_filter is not None:
+                        if collection != "evidence" or set(metadata_filter) != {
+                            "vector_generation", "document_ids"
+                        }:
+                            raise VectorStoreError("Unsupported vector metadata filter")
+                        generation = metadata_filter["vector_generation"]
+                        document_ids = metadata_filter["document_ids"]
+                        if not isinstance(generation, str) or not isinstance(document_ids, list):
+                            raise VectorStoreError("Invalid vector metadata filter")
+                        clauses.append(sql.SQL("metadata->>'vector_generation' = %s"))
+                        clauses.append(sql.SQL("metadata->>'document_id' = ANY(%s)"))
+                        filter_params.extend((generation, document_ids))
+                    where = (
+                        sql.SQL(" WHERE ") + sql.SQL(" AND ").join(clauses)
+                        if clauses else sql.SQL("")
+                    )
                     query = sql.SQL(
                         "SELECT metadata, 1 - (embedding {} %s::{}) AS similarity "
                         "FROM {}{} ORDER BY embedding {} %s::{}, record_key LIMIT %s"
@@ -275,8 +298,7 @@ class PgVectorStore:
                         _vector_type(self._schema),
                     )
                     params = [_vector_literal(embedding)]
-                    if collection_kinds:
-                        params.append(collection_kinds)
+                    params.extend(filter_params)
                     params.extend((_vector_literal(embedding), limit))
                     cursor.execute(query, params)
                     hits.extend(hit_from_metadata(row[1], row[0]) for row in cursor.fetchall())
@@ -381,5 +403,30 @@ class PgVectorStore:
                 raw.close()
         return len(records)
 
+    def delete_generation(self, collection: str, generation: str) -> int:
+        if collection != "evidence" or not generation.startswith("gen:"):
+            raise VectorStoreError("Only exact Evidence generations may be deleted")
+        raw = None
+        try:
+            raw = self._require_writer().raw_connection()
+            with raw.cursor() as cursor:
+                cursor.execute(
+                    sql.SQL(
+                        "DELETE FROM {} WHERE kind = 'evidence' "
+                        "AND metadata->>'vector_generation' = %s"
+                    ).format(_collection(self._schema, collection)),
+                    (generation,),
+                )
+                count = cursor.rowcount
+            raw.commit()
+            return count
+        except Exception as exc:
+            if raw is not None:
+                raw.rollback()
+            raise VectorWriteUnavailable("Vector generation cleanup unavailable") from exc
+        finally:
+            if raw is not None:
+                raw.close()
+
 
 __all__ = ["ALLOWED_COLLECTIONS", "PgVectorStore"]
diff --git a/harness/tht/adapters/vector/thoth_http.py b/harness/tht/adapters/vector/thoth_http.py
index 3efeef85..67379600 100644
--- a/harness/tht/adapters/vector/thoth_http.py
+++ b/harness/tht/adapters/vector/thoth_http.py
@@ -40,7 +40,8 @@ class ThothHttpVectorStore:
     def capabilities(self) -> VectorCapabilities:
         writable = self._writer is not None
         return VectorCapabilities(
-            search=self._reader is not None, existing_hashes=writable, upsert=writable
+            search=self._reader is not None, existing_hashes=writable, upsert=writable,
+            metadata_filter=self._reader is not None, delete_generation=writable,
         )
 
     def health(self) -> VectorHealth:
@@ -91,6 +92,7 @@ class ThothHttpVectorStore:
         *,
         limit: int,
         kinds: list[str] | None = None,
+        metadata_filter: dict[str, object] | None = None,
     ) -> list[VectorHit]:
         require_positive_limit(limit)
         if self._reader is None:
@@ -103,7 +105,13 @@ class ThothHttpVectorStore:
         for collection in collections:
             _collection("vectors", collection)
             try:
-                rows = self._reader.search_similar(collection, embedding, limit, kinds=kinds)
+                if metadata_filter is None:
+                    rows = self._reader.search_similar(collection, embedding, limit, kinds=kinds)
+                else:
+                    rows = self._reader.search_similar(
+                        collection, embedding, limit, kinds=kinds,
+                        metadata_filter=metadata_filter,
+                    )
             except VectorRestError as exc:
                 raise VectorStoreError(str(exc)) from exc
             hits.extend(
@@ -144,6 +152,14 @@ class ThothHttpVectorStore:
         except VectorRestError as exc:
             raise VectorStoreError(str(exc)) from exc
 
+    def delete_generation(self, collection: str, generation: str) -> int:
+        if collection != "evidence" or not generation.startswith("gen:"):
+            raise VectorStoreError("Only exact Evidence generations may be deleted")
+        try:
+            return self._require_writer().delete_generation(collection, generation)
+        except VectorRestError as exc:
+            raise VectorStoreError(str(exc)) from exc
+
     @staticmethod
     def _row(write_record: VectorWriteRecord) -> dict:
         record = write_record.record
diff --git a/harness/tht/cli/search_cmd.py b/harness/tht/cli/search_cmd.py
index 082bc6f6..2766e3cd 100644
--- a/harness/tht/cli/search_cmd.py
+++ b/harness/tht/cli/search_cmd.py
@@ -48,6 +48,9 @@ def search_cmd(
 
     cfg = _load_config_or_exit(config)
     require_vector_cfg(cfg)
+    from tht.search.evidence import active_searcher
+
+    runtime_searcher = active_searcher(cfg, open_searcher(cfg))
     if kind is not None and kind not in KIND_MAP:
         typer.secho(
             f"ERRORE: --kind sconosciuto: {kind} (validi: {', '.join(KIND_MAP)})",
@@ -112,7 +115,7 @@ def search_cmd(
 
         candidates = combined_search(
             keyword=keyword, lsh_hits=lsh_hits,
-            store=open_searcher(cfg), embedder=make_embedder(cfg.embeddings),
+            store=runtime_searcher, embedder=make_embedder(cfg.embeddings),
             top=cfg.search.schema_chunk_pool, rrf_k=cfg.search.rrf_k,
             kinds=KIND_MAP["schema"],
         )
@@ -156,7 +159,7 @@ def search_cmd(
         kinds = KIND_MAP.get(kind) if kind else None
         results = combined_search(
             keyword=keyword, lsh_hits=lsh_hits if kind != "evidence" else None,
-            store=open_searcher(cfg), embedder=make_embedder(cfg.embeddings),
+            store=runtime_searcher, embedder=make_embedder(cfg.embeddings),
             top=top, rrf_k=cfg.search.rrf_k, kinds=kinds,
         )
 
@@ -249,7 +252,9 @@ def pack_cmd(
     vec = None
     searcher = embedder = None
     try:
-        searcher = open_searcher(cfg)
+        from tht.search.evidence import active_searcher
+
+        searcher = active_searcher(cfg, open_searcher(cfg))
         embedder = make_embedder(cfg.embeddings)
         vec = embedder.embed_query(question)
     except degrade as e:
diff --git a/harness/tht/cli/vector_cmd.py b/harness/tht/cli/vector_cmd.py
index 7a297876..f54546bc 100644
--- a/harness/tht/cli/vector_cmd.py
+++ b/harness/tht/cli/vector_cmd.py
@@ -60,9 +60,10 @@ def open_searcher(cfg):
     store = build_vector_store(cfg)
 
     class AdapterSearcher:
-        def search(self, query_vec, top_n=10, kinds=None):
+        def search(self, query_vec, top_n=10, kinds=None, metadata_filter=None):
             return store.search(
-                tables_for_kinds(kinds), query_vec, limit=top_n, kinds=kinds
+                tables_for_kinds(kinds), query_vec, limit=top_n, kinds=kinds,
+                metadata_filter=metadata_filter,
             )
 
     return AdapterSearcher()
diff --git a/harness/tht/corpus/pipeline.py b/harness/tht/corpus/pipeline.py
index 5da17151..6e0a8ba2 100644
--- a/harness/tht/corpus/pipeline.py
+++ b/harness/tht/corpus/pipeline.py
@@ -72,6 +72,8 @@ class CorpusPipeline:
             return self._run(dry_run=dry_run, resume=resume)
 
     def _run(self, *, dry_run: bool = False, resume: str | None = None) -> PipelineResult:
+        generation = None
+        vector_written = False
         previous = self.store.active_manifest()
         try:
             discovered = self._discover()
@@ -138,6 +140,7 @@ class CorpusPipeline:
             records = [self._vector_record(part, vector, generation) for part, vector in zip(changed_chunks, embeddings, strict=True)]
             if records:
                 written = self.vector_store.upsert("evidence", records)
+                vector_written = True
                 if written != len(records):
                     raise PipelineError("vector write count mismatch")
             generation_path = self.store.generation_path(generation)
@@ -156,11 +159,26 @@ class CorpusPipeline:
                 )
             self.store.publish(staged)
         except PipelineError:
+            self._compensate(generation, vector_written)
             raise
         except Exception as error:
+            self._compensate(generation, vector_written)
             raise PipelineError("Evidence preprocessing failed") from error
         return PipelineResult("succeeded", generation, True, changed, unchanged, removed, self.store.manifest(generation))
 
+    def _compensate(self, generation: str | None, vector_written: bool) -> None:
+        if generation is None:
+            return
+        try:
+            self.store.discard(generation)
+        except Exception:
+            pass
+        if vector_written:
+            try:
+                self.vector_store.delete_generation("evidence", generation)
+            except Exception:
+                pass
+
     @staticmethod
     def _vector_record(chunk: CanonicalChunk, embedding: list[float], generation: str):
         record = VectorRecord(
diff --git a/harness/tht/corpus/store.py b/harness/tht/corpus/store.py
index 5dd60e0d..1c85c74f 100644
--- a/harness/tht/corpus/store.py
+++ b/harness/tht/corpus/store.py
@@ -7,6 +7,7 @@ import fcntl
 import os
 import re
 import stat
+import shutil
 import uuid
 from pathlib import Path
 from contextlib import contextmanager
@@ -137,6 +138,13 @@ class CorpusStore:
             raise UnsafeCorpusPath("manifest must not be a symlink")
         return CorpusManifest.model_validate_json(manifest_path.read_text(encoding="utf-8"))
 
+    def discard(self, generation: str) -> None:
+        path = self.generation_path(generation)
+        if path.exists():
+            if path.is_symlink() or not stat.S_ISDIR(path.lstat().st_mode):
+                raise UnsafeCorpusPath("generation cleanup target is unsafe")
+            shutil.rmtree(path)
+
     def active_manifest(self) -> CorpusManifest | None:
         generation = self.active_generation()
         return self.manifest(generation) if generation else None
diff --git a/harness/tht/ports/vector.py b/harness/tht/ports/vector.py
index 1b29ea62..84f5b6fe 100644
--- a/harness/tht/ports/vector.py
+++ b/harness/tht/ports/vector.py
@@ -12,6 +12,8 @@ class VectorCapabilities:
     search: bool = True
     existing_hashes: bool = False
     upsert: bool = False
+    metadata_filter: bool = False
+    delete_generation: bool = False
 
 
 @dataclass(frozen=True)
@@ -70,12 +72,15 @@ class VectorStore(Protocol):
         *,
         limit: int,
         kinds: list[str] | None = None,
+        metadata_filter: dict[str, object] | None = None,
     ) -> list[VectorHit]: ...
 
     def existing_hashes(self, collection: str, kinds: list[str]) -> dict[str, str]: ...
 
     def upsert(self, collection: str, records: list[VectorWriteRecord]) -> int: ...
 
+    def delete_generation(self, collection: str, generation: str) -> int: ...
+
 
 __all__ = [
     "VectorCapabilities",
diff --git a/harness/tht/search/evidence.py b/harness/tht/search/evidence.py
index e58dca74..a42cb72f 100644
--- a/harness/tht/search/evidence.py
+++ b/harness/tht/search/evidence.py
@@ -3,6 +3,44 @@
 from tht.corpus.store import CorpusStore
 
 
+class ActiveEvidenceSearcher:
+    """Searcher facade that enforces ACTIVE generation predicates before LIMIT."""
+
+    def __init__(self, corpus: CorpusStore, delegate):
+        self.corpus = corpus
+        self.delegate = delegate
+
+    def search(self, embedding, top_n=10, kinds=None, metadata_filter=None):
+        if kinds != ["evidence"]:
+            return self.delegate.search(embedding, top_n=top_n, kinds=kinds)
+        manifest = self.corpus.active_manifest()
+        if manifest is None:
+            return []
+        by_generation: dict[str, list[str]] = {}
+        mapping = dict(manifest.metadata.get("document_generations", {}))
+        for document in manifest.documents:
+            generation = mapping.get(document.document_id, manifest.vector_generation)
+            if generation:
+                by_generation.setdefault(generation, []).append(document.document_id)
+        hits = []
+        for generation, document_ids in by_generation.items():
+            hits.extend(self.delegate.search(
+                embedding, top_n=top_n, kinds=["evidence"],
+                metadata_filter={
+                    "vector_generation": generation,
+                    "document_ids": document_ids,
+                },
+            ))
+        return sorted(hits, key=lambda hit: (-hit.similarity, hit.id))[:top_n]
+
+
+def active_searcher(cfg, delegate):
+    corpus_root = cfg.paths.artifacts.parent / "corpus"
+    if not corpus_root.exists():
+        return delegate
+    return ActiveEvidenceSearcher(CorpusStore(corpus_root), delegate)
+
+
 def active_evidence_hits(store: CorpusStore, vector_store, embedding, *, limit: int):
     manifest = store.active_manifest()
     if manifest is None or manifest.vector_generation is None:
diff --git a/harness/tht/session/artifacts.py b/harness/tht/session/artifacts.py
index 6672ce80..e0e2c44b 100644
--- a/harness/tht/session/artifacts.py
+++ b/harness/tht/session/artifacts.py
@@ -7,15 +7,11 @@ from tht.session.models import SchemaLinking
 def _find_evidence_file(evidence_root: Path, evidence_id: str) -> str:
     # New deployments resolve only immutable materialized files from ACTIVE.  Keep
     # the legacy curated-tree fallback for sessions created before a corpus exists.
-    try:
+    corpus_root = evidence_root.parent.parent / "corpus"
+    if corpus_root.exists():
         from tht.corpus.store import CorpusStore
         from tht.search.evidence import resolve_evidence_file
-
-        corpus_root = evidence_root.parent.parent / "corpus"
-        if corpus_root.exists():
-            return resolve_evidence_file(CorpusStore(corpus_root), evidence_id)
-    except (OSError, RuntimeError, ValueError):
-        pass
+        return resolve_evidence_file(CorpusStore(corpus_root), evidence_id)
     for match in evidence_root.rglob(f"{evidence_id}.md"):
         return str(match)
     return ""
diff --git a/harness/tht/vectorstore/rest_client.py b/harness/tht/vectorstore/rest_client.py
index 45c006b0..f78db770 100644
--- a/harness/tht/vectorstore/rest_client.py
+++ b/harness/tht/vectorstore/rest_client.py
@@ -60,6 +60,7 @@ class VectorRestClient:
     def search_similar(
         self, table_name: str, query_embedding: list[float], limit_count: int,
         kinds: list[str] | None = None,
+        metadata_filter: dict | None = None,
     ) -> list[dict]:
         """Ricerca per similarità coseno su `vectors.<table_name>`: ritorna le righe
         `{id, similarity, metadata}` ordinate per similarity decrescente. Con `kinds`
@@ -72,6 +73,13 @@ class VectorRestClient:
             "limit_count": limit_count,
             "table_name": table_name,
         }
+        if metadata_filter is not None:
+            # ACTIVE corpus reads must never degrade to an unfiltered legacy RPC:
+            # filtering after LIMIT is incomplete and could expose stale generations.
+            return self._call(
+                "search_similar",
+                {**args, "kinds": kinds, "metadata_filter": metadata_filter},
+            ) or []
         if kinds is not None:
             try:
                 return self._call("search_similar", {**args, "kinds": kinds}) or []
@@ -118,3 +126,12 @@ class VectorRestClient:
                 return int(payload[0]["upserted"])
             return len(payload)
         return len(rows)
+
+    def delete_generation(self, table_name: str, generation: str) -> int:
+        payload = self._call(
+            "delete_vector_generation",
+            {"table_name": table_name, "kind": "evidence", "generation": generation},
+        )
+        if isinstance(payload, dict):
+            return int(payload.get("deleted", 0))
+        return 0