diff --git a/src/review/rag-index.ts b/src/review/rag-index.ts
index a1bfb98f82..16c1a8221c 100644
--- a/src/review/rag-index.ts
+++ b/src/review/rag-index.ts
@@ -27,6 +27,7 @@
 
 import { createInstallationToken } from "../github/app";
 import { githubRateLimitAdmissionKeyForInstallation, timeoutFetch, type GitHubRateLimitAdmissionKey } from "../github/client";
+import { incr } from "../selfhost/metrics";
 import { isConfigFile, isDependencyManifestFile } from "../signals/path-matchers";
 import { repoParts } from "../utils/json";
 import { createReviewAdapters } from "./adapters";
@@ -315,7 +316,11 @@ export async function indexRepo(
     );
     return { indexed: upserted, files: filesIndexed, capped };
   } catch (error) {
-    console.log(JSON.stringify({ ev: "rag_index_repo_error", repo: repo.fullName, message: String(error).slice(0, 200) }));
+    // ERROR level + counter (#3894): previously a no-`level` console.log invisible to Sentry, and this
+    // failure class had no metric at all -- gittensory_qdrant_errors_total only fires inside the Qdrant
+    // adapter itself, so an upstream failure here (GitHub tree/contents fetch, chunking) never counted.
+    console.error(JSON.stringify({ level: "error", event: "rag_index_repo_error", ev: "rag_index_repo_error", repo: repo.fullName, message: String(error).slice(0, 200) }));
+    incr("gittensory_rag_pipeline_errors_total", { op: "index_repo" });
     return empty;
   }
 }
@@ -378,7 +383,9 @@ export async function reindexChangedPaths(
     );
     return { indexed: upserted, files: filesIndexed, capped };
   } catch (error) {
-    console.log(JSON.stringify({ ev: "rag_reindex_paths_error", repo: repo.fullName, message: String(error).slice(0, 200) }));
+    // ERROR level + counter (#3894): see indexRepo's catch above -- same invisible-to-Sentry, no-metric fix.
+    console.error(JSON.stringify({ level: "error", event: "rag_reindex_paths_error", ev: "rag_reindex_paths_error", repo: repo.fullName, message: String(error).slice(0, 200) }));
+    incr("gittensory_rag_pipeline_errors_total", { op: "reindex_paths" });
     return empty;
   }
 }
diff --git a/src/review/rag.ts b/src/review/rag.ts
index e65653a6d6..552ed41003 100644
--- a/src/review/rag.ts
+++ b/src/review/rag.ts
@@ -300,7 +300,11 @@ export async function embedTexts(inference: InferenceAdapter | undefined, texts:
     }
     return out;
   } catch (error) {
-    console.log(JSON.stringify({ ev: "rag_embed_error", message: String(error).slice(0, 200) }));
+    // ERROR level (#3894): an embedding-provider failure previously logged at console.log with no `level`,
+    // invisible to the central Sentry forwarder -- mirrors the already-fixed retrieveContextWithMetrics
+    // catch below. Shares its `review_context_fetch_failed`/contextType:"rag" umbrella so both are
+    // searchable together, plus the specific `ev` tag for log continuity.
+    console.error(JSON.stringify({ level: "error", event: "review_context_fetch_failed", contextType: "rag", ev: "rag_embed_error", message: String(error).slice(0, 200) }));
     return null;
   }
 }
@@ -332,7 +336,8 @@ export async function upsertChunks(infra: RagInfra, project: string, repo: strin
     await db.batch(stmts);
     return chunks.length;
   } catch (error) {
-    console.log(JSON.stringify({ ev: "rag_upsert_error", message: String(error).slice(0, 200) }));
+    // ERROR level (#3894): see embedTexts's catch above -- same invisible-to-Sentry fix, same umbrella.
+    console.error(JSON.stringify({ level: "error", event: "review_context_fetch_failed", contextType: "rag", ev: "rag_upsert_error", message: String(error).slice(0, 200) }));
     return 0;
   }
 }
@@ -360,7 +365,8 @@ export async function deleteChunksForPaths(infra: RagInfra, project: string, rep
       await db.prepare(`DELETE FROM repo_chunks WHERE id IN (${batch.map(() => "?").join(",")})`).bind(...batch).run();
     }
   } catch (error) {
-    console.log(JSON.stringify({ ev: "rag_delete_error", message: String(error).slice(0, 200) }));
+    // ERROR level (#3894): see embedTexts's catch above -- same invisible-to-Sentry fix, same umbrella.
+    console.error(JSON.stringify({ level: "error", event: "review_context_fetch_failed", contextType: "rag", ev: "rag_delete_error", message: String(error).slice(0, 200) }));
   }
 }
 
@@ -565,7 +571,8 @@ export async function readChunkTexts(storage: StorageAdapter, ids: string[]): Pr
       .all<{ id: string; text: string }>();
     for (const r of rows.results ?? []) map.set(r.id, r.text);
   } catch (error) {
-    console.log(JSON.stringify({ ev: "rag_chunk_read_error", message: String(error).slice(0, 200) }));
+    // ERROR level (#3894): see embedTexts's catch above -- same invisible-to-Sentry fix, same umbrella.
+    console.error(JSON.stringify({ level: "error", event: "review_context_fetch_failed", contextType: "rag", ev: "rag_chunk_read_error", message: String(error).slice(0, 200) }));
   }
   return map;
 }
diff --git a/src/selfhost/metrics.ts b/src/selfhost/metrics.ts
index 25b2a21a74..c6b9c38512 100644
--- a/src/selfhost/metrics.ts
+++ b/src/selfhost/metrics.ts
@@ -97,6 +97,7 @@ const DEFAULT_METRIC_META: readonly (readonly [string, MetricMeta])[] = [
   ["gittensory_qdrant_queries_total", { help: "Qdrant vector query attempts.", type: "counter" }],
   ["gittensory_qdrant_upserts_total", { help: "Qdrant vector upserted item count.", type: "counter" }],
   ["gittensory_qdrant_errors_total", { help: "Qdrant vector operation errors.", type: "counter" }],
+  ["gittensory_rag_pipeline_errors_total", { help: "RAG index-population pipeline errors (repo/path indexing), by op.", type: "counter" }],
   ["gittensory_orb_events_exported_total", { help: "Orb events exported from the self-host runtime.", type: "counter" }],
   ["gittensory_orb_export_errors_total", { help: "Orb event export errors.", type: "counter" }],
   ["gittensory_orb_relay_drains_total", { help: "Orb relay drain outcomes.", type: "counter" }],
diff --git a/test/unit/rag-index.test.ts b/test/unit/rag-index.test.ts
index 0bc8eb11ab..3e519778dd 100644
--- a/test/unit/rag-index.test.ts
+++ b/test/unit/rag-index.test.ts
@@ -6,6 +6,7 @@ import { upsertRepositoryFromGitHub } from "../../src/db/repositories";
 import { upsertRepoFocusManifest } from "../../src/signals/focus-manifest-loader";
 import * as githubApp from "../../src/github/app";
 import { githubRateLimitAdmissionKeyForInstallation, latestGitHubRestRateLimitObservation } from "../../src/github/client";
+import { renderMetrics, resetMetrics } from "../../src/selfhost/metrics";
 import { createTestEnv, TestD1Database } from "../helpers/d1";
 
 // A valid bge-m3-width (1024-d) embedding vector — embedTexts rejects any other width.
@@ -279,6 +280,26 @@ describe("indexRepo: full repo index (tree → chunk → embed → upsert)", ()
     allReturn = {};
     await expect(indexRepo(env, PROJECT, REPO)).resolves.toEqual({ indexed: 0, files: 0, capped: false });
   });
+
+  it("a Cloudflare binding access that throws degrades to nothing indexed (indexRepo's own outer catch) + surfaces it at ERROR for Sentry with a counter (#3894)", async () => {
+    const { env } = indexEnv();
+    resetMetrics();
+    const errSpy = vi.spyOn(console, "error").mockImplementation(() => {});
+    // A binding CAN throw on access in real Workers runtime edge cases (revoked/misconfigured binding).
+    // Every I/O step inside indexRepo already self-catches (fetchRepoTree, fetchFileText, upsertChunks,
+    // resolveReadToken, ...), so this is the one realistic way to reach the function's own outer catch.
+    const throwingEnv = new Proxy(env, {
+      get(target, prop, receiver) {
+        if (prop === "VECTORIZE") throw new Error("binding access boom");
+        return Reflect.get(target, prop, receiver);
+      },
+    });
+    await expect(indexRepo(throwingEnv as typeof env, PROJECT, REPO)).resolves.toEqual({ indexed: 0, files: 0, capped: false });
+    const parsed = errSpy.mock.calls.map((c) => JSON.parse(c[0] as string));
+    expect(parsed.some((p) => p.level === "error" && p.event === "rag_index_repo_error" && p.ev === "rag_index_repo_error")).toBe(true);
+    expect(await renderMetrics()).toContain('gittensory_rag_pipeline_errors_total{op="index_repo"}');
+    errSpy.mockRestore();
+  });
 });
 
 describe("indexRepo: MAX_CHUNKS_PER_REPO cap holds", () => {
@@ -570,6 +591,25 @@ describe("reindexChangedPaths: delete + re-upsert only the changed paths", () =>
     expect(vec.deleted.length).toBe(0);
     expect(vec.upserted.length).toBe(0);
   });
+
+  it("a Cloudflare binding access that throws degrades to nothing indexed (reindexChangedPaths' own outer catch) + surfaces it at ERROR for Sentry with a counter (#3894)", async () => {
+    const { env } = indexEnv();
+    resetMetrics();
+    const errSpy = vi.spyOn(console, "error").mockImplementation(() => {});
+    // Same rationale as indexRepo's equivalent test above: every I/O step here already self-catches, so a
+    // binding access throw is the one realistic way to reach this function's own outer catch.
+    const throwingEnv = new Proxy(env, {
+      get(target, prop, receiver) {
+        if (prop === "VECTORIZE") throw new Error("binding access boom");
+        return Reflect.get(target, prop, receiver);
+      },
+    });
+    await expect(reindexChangedPaths(throwingEnv as typeof env, PROJECT, REPO, ["src/a.ts"])).resolves.toEqual({ indexed: 0, files: 0, capped: false });
+    const parsed = errSpy.mock.calls.map((c) => JSON.parse(c[0] as string));
+    expect(parsed.some((p) => p.level === "error" && p.event === "rag_reindex_paths_error" && p.ev === "rag_reindex_paths_error")).toBe(true);
+    expect(await renderMetrics()).toContain('gittensory_rag_pipeline_errors_total{op="reindex_paths"}');
+    errSpy.mockRestore();
+  });
 });
 
 describe("flag-off / missing-infra is a no-op (no GitHub fetch, no adapter use)", () => {
diff --git a/test/unit/rag.test.ts b/test/unit/rag.test.ts
index 8dee900309..3114cef0d3 100644
--- a/test/unit/rag.test.ts
+++ b/test/unit/rag.test.ts
@@ -1,4 +1,4 @@
-import { describe, expect, it } from "vitest";
+import { describe, expect, it, vi } from "vitest";
 import {
   bm25Rerank,
   bm25Scores,
@@ -469,8 +469,13 @@ describe("rag: upsertChunks (embed + vector upsert + chunk-text store)", () => {
   });
 
   it("returns 0 (no throw) when the vector upsert fails (#fail-safe)", async () => {
+    const errSpy = vi.spyOn(console, "error").mockImplementation(() => {});
     const vector = { upsert: async () => { throw new Error("vectorize down"); } } as unknown as VectorAdapter;
     expect(await upsertChunks({ storage: storageStub(), vector, inference: ai1024 }, "p", "o/r", chunks)).toBe(0);
+    // #3894: previously a no-level console.log, invisible to Sentry.
+    const parsed = errSpy.mock.calls.map((c) => JSON.parse(c[0] as string));
+    expect(parsed.some((p) => p.level === "error" && p.event === "review_context_fetch_failed" && p.contextType === "rag" && p.ev === "rag_upsert_error")).toBe(true);
+    errSpy.mockRestore();
   });
 });
 
@@ -510,8 +515,13 @@ describe("rag: deleteChunksForPaths (incremental re-index of changed files)", ()
   });
 
   it("swallows a storage failure (fail-safe; never throws)", async () => {
+    const errSpy = vi.spyOn(console, "error").mockImplementation(() => {});
     const storage = { prepare: () => { throw new Error("d1 down"); }, batch: async () => undefined } as unknown as StorageAdapter;
     await expect(deleteChunksForPaths({ storage }, "p", "o/r", ["src/a.ts"])).resolves.toBeUndefined();
+    // #3894: previously a no-level console.log, invisible to Sentry.
+    const parsed = errSpy.mock.calls.map((c) => JSON.parse(c[0] as string));
+    expect(parsed.some((p) => p.level === "error" && p.event === "review_context_fetch_failed" && p.contextType === "rag" && p.ev === "rag_delete_error")).toBe(true);
+    errSpy.mockRestore();
   });
 
   it("treats a SELECT result with NO `results` key as zero ids (the `rows.results ?? []` fallback)", async () => {
@@ -535,14 +545,24 @@ describe("rag: storage/inference catch paths return their fail-safe defaults", (
   });
 
   it("embedTexts returns null when inference throws", async () => {
+    const errSpy = vi.spyOn(console, "error").mockImplementation(() => {});
     const inference: InferenceAdapter = { run: async () => { throw new Error("ai down"); } };
     expect(await embedTexts(inference, ["hi"])).toBeNull();
+    // #3894: previously a no-level console.log, invisible to Sentry.
+    const parsed = errSpy.mock.calls.map((c) => JSON.parse(c[0] as string));
+    expect(parsed.some((p) => p.level === "error" && p.event === "review_context_fetch_failed" && p.contextType === "rag" && p.ev === "rag_embed_error")).toBe(true);
+    errSpy.mockRestore();
   });
 
   it("readChunkTexts returns an empty Map when the storage read throws", async () => {
+    const errSpy = vi.spyOn(console, "error").mockImplementation(() => {});
     const storage = { prepare: () => { throw new Error("d1 down"); }, batch: async () => undefined } as unknown as StorageAdapter;
     const map = await readChunkTexts(storage, ["id-1"]);
     expect(map.size).toBe(0);
+    // #3894: previously a no-level console.log, invisible to Sentry.
+    const parsed = errSpy.mock.calls.map((c) => JSON.parse(c[0] as string));
+    expect(parsed.some((p) => p.level === "error" && p.event === "review_context_fetch_failed" && p.contextType === "rag" && p.ev === "rag_chunk_read_error")).toBe(true);
+    errSpy.mockRestore();
   });
 
   it("readChunkTexts short-circuits on an empty id list", async () => {