diff --git a/packages/loopover-miner/lib/contribution-profile-cache.d.ts b/packages/loopover-miner/lib/contribution-profile-cache.d.ts
new file mode 100644
index 0000000000..4d4ce1d4b0
--- /dev/null
+++ b/packages/loopover-miner/lib/contribution-profile-cache.d.ts
@@ -0,0 +1,36 @@
+import type {
+  CachedContributionProfile,
+  ContributionProfile,
+} from "./contribution-profile.js";
+
+export type ContributionProfileCache = {
+  dbPath: string;
+  /** Read a cached profile, or null when absent or unparseable. `stale` is true past the TTL. */
+  get(repoFullName: string, nowMs?: number): CachedContributionProfile | null;
+  /** Cache a profile keyed by its own repoFullName, stamped with `nowMs` (defaults to now). */
+  put(
+    profile: ContributionProfile,
+    nowMs?: number,
+  ): { repoFullName: string; fetchedAt: string };
+  close(): void;
+};
+
+export function resolveContributionProfileCacheDbPath(
+  env?: Record<string, string | undefined>,
+): string;
+
+export function initContributionProfileCache(
+  dbPath?: string,
+): ContributionProfileCache;
+
+export function getCachedContributionProfile(
+  repoFullName: string,
+  nowMs?: number,
+): CachedContributionProfile | null;
+
+export function putCachedContributionProfile(
+  profile: ContributionProfile,
+  nowMs?: number,
+): { repoFullName: string; fetchedAt: string };
+
+export function closeDefaultContributionProfileCache(): void;
diff --git a/packages/loopover-miner/lib/contribution-profile-cache.js b/packages/loopover-miner/lib/contribution-profile-cache.js
new file mode 100644
index 0000000000..5cb5d874d6
--- /dev/null
+++ b/packages/loopover-miner/lib/contribution-profile-cache.js
@@ -0,0 +1,137 @@
+// ContributionProfile local cache store (#6797). Persists the extraction output (#6796) keyed by repo, so a
+// repeated `discover` run within the freshness window doesn't re-fetch/re-parse the same labels + docs. 100%
+// local/client-side, like every other miner store: never uploads, syncs, or phones home. Follows the shared
+// local-store.js pattern (openLocalStoreDb + resolveLocalStoreDbPath + the schema-version stamp) so it is
+// picked up by `doctor`'s store-integrity sweep and `migrate` the same way its siblings are.
+import {
+  CONTRIBUTION_PROFILE_CACHE_TTL_MS,
+  CONTRIBUTION_PROFILE_STORE_TABLE,
+} from "./contribution-profile.js";
+import {
+  normalizeLocalStoreDbPath,
+  openLocalStoreDb,
+  resolveLocalStoreDbPath,
+} from "./local-store.js";
+import { applySchemaMigrations } from "./schema-version.js";
+
+const defaultDbFileName = "contribution-profile-cache.sqlite3";
+let defaultContributionProfileCache = null;
+
+export function resolveContributionProfileCacheDbPath(env = process.env) {
+  return resolveLocalStoreDbPath(
+    defaultDbFileName,
+    "LOOPOVER_MINER_CONTRIBUTION_PROFILE_CACHE_DB",
+    env,
+  );
+}
+
+function normalizeDbPath(dbPath) {
+  return normalizeLocalStoreDbPath(
+    dbPath,
+    resolveContributionProfileCacheDbPath(),
+    "invalid_contribution_profile_cache_db_path",
+  );
+}
+
+function normalizeRepoFullName(repoFullName) {
+  if (typeof repoFullName !== "string")
+    throw new Error("invalid_repo_full_name");
+  const [owner, repo, extra] = repoFullName.trim().split("/");
+  if (!owner || !repo || extra !== undefined)
+    throw new Error("invalid_repo_full_name");
+  return `${owner}/${repo}`;
+}
+
+/**
+ * Open the 100%-local contribution-profile cache. The DB only lives on this machine (#6797).
+ *
+ * @param {string} [dbPath]
+ */
+export function initContributionProfileCache(
+  dbPath = resolveContributionProfileCacheDbPath(),
+) {
+  const resolvedPath = normalizeDbPath(dbPath);
+  const db = openLocalStoreDb(resolvedPath);
+  db.exec(`
+    CREATE TABLE IF NOT EXISTS ${CONTRIBUTION_PROFILE_STORE_TABLE} (
+      repo_full_name TEXT PRIMARY KEY,
+      profile_json TEXT NOT NULL,
+      fetched_at TEXT NOT NULL
+    )
+  `);
+  // Schema-version convention (#4832): stamp the baseline. No post-baseline migrations for this v1 store yet.
+  applySchemaMigrations(db, []);
+
+  const getStatement = db.prepare(
+    `SELECT profile_json, fetched_at FROM ${CONTRIBUTION_PROFILE_STORE_TABLE} WHERE repo_full_name = ?`,
+  );
+  const putStatement = db.prepare(`
+    INSERT INTO ${CONTRIBUTION_PROFILE_STORE_TABLE} (repo_full_name, profile_json, fetched_at)
+    VALUES (?, ?, ?)
+    ON CONFLICT(repo_full_name) DO UPDATE SET
+      profile_json = excluded.profile_json,
+      fetched_at = excluded.fetched_at
+  `);
+
+  return {
+    dbPath: resolvedPath,
+    /**
+     * Read a cached profile. Returns { profile, fetchedAt, stale } or null when absent. `stale` is true once
+     * the row is older than the TTL, so a caller re-extracts. A row whose JSON is unparseable is treated as a
+     * miss (fail closed) rather than throwing — a corrupted/hand-edited file must not break discover.
+     *
+     * @param {string} repoFullName
+     * @param {number} [nowMs] current time in ms, injectable for deterministic tests
+     */
+    get(repoFullName, nowMs = Date.now()) {
+      const row = getStatement.get(normalizeRepoFullName(repoFullName));
+      if (!row) return null;
+      let profile;
+      try {
+        profile = JSON.parse(row.profile_json);
+      } catch {
+        return null;
+      }
+      const fetchedMs = Date.parse(row.fetched_at);
+      // An unparseable timestamp fails closed to stale, so a corrupted row is re-extracted rather than trusted.
+      const stale =
+        Number.isNaN(fetchedMs) ||
+        nowMs - fetchedMs > CONTRIBUTION_PROFILE_CACHE_TTL_MS;
+      return { profile, fetchedAt: row.fetched_at, stale };
+    },
+    /**
+     * Cache a profile, stamping it with the current time. The profile's own repoFullName is the key.
+     *
+     * @param {{ repoFullName: string }} profile a ContributionProfile
+     * @param {number} [nowMs] current time in ms, injectable for deterministic tests
+     */
+    put(profile, nowMs = Date.now()) {
+      const repoFullName = normalizeRepoFullName(profile?.repoFullName);
+      const fetchedAt = new Date(nowMs).toISOString();
+      putStatement.run(repoFullName, JSON.stringify(profile), fetchedAt);
+      return { repoFullName, fetchedAt };
+    },
+    close() {
+      db.close();
+    },
+  };
+}
+
+function getDefaultContributionProfileCache() {
+  defaultContributionProfileCache ??= initContributionProfileCache();
+  return defaultContributionProfileCache;
+}
+
+export function getCachedContributionProfile(repoFullName, nowMs) {
+  return getDefaultContributionProfileCache().get(repoFullName, nowMs);
+}
+
+export function putCachedContributionProfile(profile, nowMs) {
+  return getDefaultContributionProfileCache().put(profile, nowMs);
+}
+
+export function closeDefaultContributionProfileCache() {
+  if (!defaultContributionProfileCache) return;
+  defaultContributionProfileCache.close();
+  defaultContributionProfileCache = null;
+}
diff --git a/packages/loopover-miner/lib/migrate-cli.js b/packages/loopover-miner/lib/migrate-cli.js
index 4e0631e5cb..65af977cc8 100644
--- a/packages/loopover-miner/lib/migrate-cli.js
+++ b/packages/loopover-miner/lib/migrate-cli.js
@@ -22,6 +22,7 @@ import { openGovernorState, resolveGovernorStateDbPath } from "./governor-state.
 import { initAttemptLog, resolveAttemptLogDbPath } from "./attempt-log.js";
 import { openReplaySnapshotStore, resolveReplaySnapshotDbPath } from "./replay-snapshot.js";
 import { openWorktreeAllocator, resolveWorktreeAllocatorDbPath } from "./worktree-allocator.js";
+import { initContributionProfileCache, resolveContributionProfileCacheDbPath } from "./contribution-profile-cache.js";
 
 const MIGRATE_USAGE = "Usage: loopover-miner migrate [--json]";
 
@@ -37,6 +38,7 @@ const STORES = [
   { name: "attempt-log", resolveDbPath: resolveAttemptLogDbPath, open: initAttemptLog },
   { name: "replay-snapshot", resolveDbPath: resolveReplaySnapshotDbPath, open: openReplaySnapshotStore },
   { name: "worktree-allocator", resolveDbPath: resolveWorktreeAllocatorDbPath, open: (dbPath) => openWorktreeAllocator({ dbPath }) },
+  { name: "contribution-profile", resolveDbPath: resolveContributionProfileCacheDbPath, open: initContributionProfileCache },
 ];
 
 /** Read a store file's stamped schema version without ever creating it -- matches checkStoreIntegrity's
diff --git a/packages/loopover-miner/lib/status.js b/packages/loopover-miner/lib/status.js
index 3a465684de..ec6b9252c7 100644
--- a/packages/loopover-miner/lib/status.js
+++ b/packages/loopover-miner/lib/status.js
@@ -25,6 +25,7 @@ import { resolveGovernorStateDbPath } from "./governor-state.js";
 import { resolveAttemptLogDbPath } from "./attempt-log.js";
 import { resolveReplaySnapshotDbPath } from "./replay-snapshot.js";
 import { resolveWorktreeAllocatorDbPath } from "./worktree-allocator.js";
+import { resolveContributionProfileCacheDbPath } from "./contribution-profile-cache.js";
 
 // Slim laptop-mode CLI commands (#2288): `status` (what's installed + where local state lives) and `doctor` (is
 // this laptop set up correctly). Both are read-only and 100% local — no repo-scanning, no coding-agent invocation,
@@ -316,6 +317,7 @@ function storeIntegrityChecks(env) {
     ["attempt-log", resolveAttemptLogDbPath(env)],
     ["replay-snapshot", resolveReplaySnapshotDbPath(env)],
     ["worktree-allocator", resolveWorktreeAllocatorDbPath(env)],
+    ["contribution-profile", resolveContributionProfileCacheDbPath(env)],
   ];
   return stores.map(([name, dbPath]) => checkStoreIntegrity(`store-integrity:${name}`, dbPath));
 }
diff --git a/packages/loopover-miner/package.json b/packages/loopover-miner/package.json
index 4d9a286bde..6792bcff47 100644
--- a/packages/loopover-miner/package.json
+++ b/packages/loopover-miner/package.json
@@ -38,7 +38,7 @@
   "scripts": {
     "benchmark": "node scripts/benchmark.mjs",
     "cross-repo-eval": "node scripts/cross-repo-evaluation.mjs",
-    "build": "node --check bin/loopover-miner.js && node --check bin/loopover-miner-mcp.js && node --check lib/ams-policy.js && node --check lib/attempt-cli.js && node --check lib/attempt-input-builder.js && node --check lib/attempt-log.js && node --check lib/attempt-runner.js && node --check lib/attempt-worktree.js && node --check lib/calibration-run.js && node --check lib/calibration-types.js && node --check lib/calibration.js && node --check lib/chat-action-dispatch.js && node --check lib/chat-action-registry.js && node --check lib/chat-discover-attempt-actions.js && node --check lib/chat-governor-actions.js && node --check lib/chat-portfolio-actions.js && node --check lib/ci-poller.js && node --check lib/claim-adjudication.js && node --check lib/claim-conflict-resolver.js && node --check lib/claim-ledger-cli.js && node --check lib/claim-ledger-expiry.js && node --check lib/claim-ledger.js && node --check lib/cli.js && node --check lib/coding-agent-construction.js && node --check lib/coding-agent-house-rules.js && node --check lib/coding-task-spec.js && node --check lib/contribution-profile.js && node --check lib/contribution-profile-extract.js && node --check lib/cross-repo-evaluation.js && node --check lib/deny-check.js && node --check lib/deny-hook-synthesis.js && node --check lib/deny-hooks.js && node --check lib/deployment-docs-audit.js && node --check lib/discover-cli.js && node --check lib/event-ledger-cli.js && node --check lib/event-ledger.js && node --check lib/execute-local-write.js && node --check lib/feasibility-cli.js && node --check lib/governor-chokepoint-persisted.js && node --check lib/governor-chokepoint.js && node --check lib/governor-kill-switch.js && node --check lib/governor-ledger-cli.js && node --check lib/governor-ledger.js && node --check lib/governor-metrics-cli.js && node --check lib/governor-pause-cli.js && node --check lib/governor-run-halt.js && node --check lib/governor-state.js && node --check lib/harness-submission-trigger.js && node --check lib/init-wizard.js && node --check lib/laptop-init.js && node --check lib/live-issue-snapshot.js && node --check lib/local-store.js && node --check lib/logger.js && node --check lib/loop-cli.js && node --check lib/loop-closure.js && node --check lib/loop-reentry.js && node --check lib/manage-poll.js && node --check lib/manage-status.js && node --check lib/metrics-cli.js && node --check lib/miner-goal-spec.js && node --check lib/opportunity-fanout.js && node --check lib/opportunity-ranker.js && node --check lib/orb-export.js && node --check lib/plan-store-cli.js && node --check lib/plan-store.js && node --check lib/policy-doc-cache.js && node --check lib/policy-verdict-cache.js && node --check lib/portfolio-dashboard.js && node --check lib/portfolio-discovery.js && node --check lib/portfolio-queue-cli.js && node --check lib/portfolio-queue-manager.js && node --check lib/portfolio-queue.js && node --check lib/portfolio-queue-expiry.js && node --check lib/pr-disposition-poller.js && node --check lib/pr-number-parse.js && node --check lib/pr-outcome.js && node --check lib/prediction-ledger.js && node --check lib/pretooluse-hook.js && node --check lib/purge-cli.js && node --check lib/ranked-candidates.js && node --check lib/rejection-signal.js && node --check lib/rejection-state-machine.js && node --check lib/rejection-templates.js && node --check lib/replay-objective-anchor.js && node --check lib/replay-snapshot.js && node --check lib/replay-task-bridge.js && node --check lib/replay-task-generation.js && node --check lib/repo-clone.js && node --check lib/run-state-cli.js && node --check lib/run-state.js && node --check lib/self-review-context.js && node --check lib/sentry.js && node --check lib/slop-assessment.js && node --check lib/stack-detection.js && node --check lib/status.js && node --check lib/submission-freshness-check.js && node --check lib/update-check.js && node --check lib/version.js && node --check lib/worktree-allocator.js"
+    "build": "node --check bin/loopover-miner.js && node --check bin/loopover-miner-mcp.js && node --check lib/ams-policy.js && node --check lib/attempt-cli.js && node --check lib/attempt-input-builder.js && node --check lib/attempt-log.js && node --check lib/attempt-runner.js && node --check lib/attempt-worktree.js && node --check lib/calibration-run.js && node --check lib/calibration-types.js && node --check lib/calibration.js && node --check lib/chat-action-dispatch.js && node --check lib/chat-action-registry.js && node --check lib/chat-discover-attempt-actions.js && node --check lib/chat-governor-actions.js && node --check lib/chat-portfolio-actions.js && node --check lib/ci-poller.js && node --check lib/claim-adjudication.js && node --check lib/claim-conflict-resolver.js && node --check lib/claim-ledger-cli.js && node --check lib/claim-ledger-expiry.js && node --check lib/claim-ledger.js && node --check lib/cli.js && node --check lib/coding-agent-construction.js && node --check lib/coding-agent-house-rules.js && node --check lib/coding-task-spec.js && node --check lib/contribution-profile.js && node --check lib/contribution-profile-cache.js && node --check lib/contribution-profile-extract.js && node --check lib/cross-repo-evaluation.js && node --check lib/deny-check.js && node --check lib/deny-hook-synthesis.js && node --check lib/deny-hooks.js && node --check lib/deployment-docs-audit.js && node --check lib/discover-cli.js && node --check lib/event-ledger-cli.js && node --check lib/event-ledger.js && node --check lib/execute-local-write.js && node --check lib/feasibility-cli.js && node --check lib/governor-chokepoint-persisted.js && node --check lib/governor-chokepoint.js && node --check lib/governor-kill-switch.js && node --check lib/governor-ledger-cli.js && node --check lib/governor-ledger.js && node --check lib/governor-metrics-cli.js && node --check lib/governor-pause-cli.js && node --check lib/governor-run-halt.js && node --check lib/governor-state.js && node --check lib/harness-submission-trigger.js && node --check lib/init-wizard.js && node --check lib/laptop-init.js && node --check lib/live-issue-snapshot.js && node --check lib/local-store.js && node --check lib/logger.js && node --check lib/loop-cli.js && node --check lib/loop-closure.js && node --check lib/loop-reentry.js && node --check lib/manage-poll.js && node --check lib/manage-status.js && node --check lib/metrics-cli.js && node --check lib/miner-goal-spec.js && node --check lib/opportunity-fanout.js && node --check lib/opportunity-ranker.js && node --check lib/orb-export.js && node --check lib/plan-store-cli.js && node --check lib/plan-store.js && node --check lib/policy-doc-cache.js && node --check lib/policy-verdict-cache.js && node --check lib/portfolio-dashboard.js && node --check lib/portfolio-discovery.js && node --check lib/portfolio-queue-cli.js && node --check lib/portfolio-queue-manager.js && node --check lib/portfolio-queue.js && node --check lib/portfolio-queue-expiry.js && node --check lib/pr-disposition-poller.js && node --check lib/pr-number-parse.js && node --check lib/pr-outcome.js && node --check lib/prediction-ledger.js && node --check lib/pretooluse-hook.js && node --check lib/purge-cli.js && node --check lib/ranked-candidates.js && node --check lib/rejection-signal.js && node --check lib/rejection-state-machine.js && node --check lib/rejection-templates.js && node --check lib/replay-objective-anchor.js && node --check lib/replay-snapshot.js && node --check lib/replay-task-bridge.js && node --check lib/replay-task-generation.js && node --check lib/repo-clone.js && node --check lib/run-state-cli.js && node --check lib/run-state.js && node --check lib/self-review-context.js && node --check lib/sentry.js && node --check lib/slop-assessment.js && node --check lib/stack-detection.js && node --check lib/status.js && node --check lib/submission-freshness-check.js && node --check lib/update-check.js && node --check lib/version.js && node --check lib/worktree-allocator.js"
   },
   "dependencies": {
     "@loopover/engine": "^3.0.0",
diff --git a/test/unit/miner-contribution-profile-cache.test.ts b/test/unit/miner-contribution-profile-cache.test.ts
new file mode 100644
index 0000000000..97a0fda853
--- /dev/null
+++ b/test/unit/miner-contribution-profile-cache.test.ts
@@ -0,0 +1,185 @@
+import { mkdtempSync, rmSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { DatabaseSync } from "node:sqlite";
+import { afterEach, describe, expect, it, vi } from "vitest";
+
+import {
+  CONTRIBUTION_PROFILE_CACHE_TTL_MS,
+  CONTRIBUTION_PROFILE_STORE_TABLE,
+  emptyContributionProfile,
+} from "../../packages/loopover-miner/lib/contribution-profile.js";
+import {
+  closeDefaultContributionProfileCache,
+  getCachedContributionProfile,
+  initContributionProfileCache,
+  putCachedContributionProfile,
+  resolveContributionProfileCacheDbPath,
+} from "../../packages/loopover-miner/lib/contribution-profile-cache.js";
+
+const roots: string[] = [];
+const stores: Array<{ close(): void }> = [];
+
+function tempStore() {
+  const root = mkdtempSync(join(tmpdir(), "loopover-miner-cp-cache-"));
+  roots.push(root);
+  const store = initContributionProfileCache(
+    join(root, "nested", "contribution-profile-cache.sqlite3"),
+  );
+  stores.push(store);
+  return store;
+}
+
+const AT_MS = Date.parse("2026-07-18T00:00:00.000Z");
+const profile = (repo = "acme/widgets") =>
+  emptyContributionProfile(repo, new Date(AT_MS).toISOString());
+
+afterEach(() => {
+  for (const store of stores.splice(0)) store.close();
+  closeDefaultContributionProfileCache();
+  vi.unstubAllEnvs();
+  for (const root of roots.splice(0))
+    rmSync(root, { recursive: true, force: true });
+});
+
+describe("contribution-profile cache store (#6797)", () => {
+  it("resolves the DB path from the env override then the config-dir convention", () => {
+    // The explicit-DB override is returned verbatim (platform-independent); the config-dir path is asserted by
+    // suffix so the assertion is stable across `/` and `\` separators.
+    expect(
+      resolveContributionProfileCacheDbPath({
+        LOOPOVER_MINER_CONTRIBUTION_PROFILE_CACHE_DB: "/custom/cp.sqlite3",
+      }),
+    ).toBe("/custom/cp.sqlite3");
+    expect(
+      resolveContributionProfileCacheDbPath({
+        LOOPOVER_MINER_CONFIG_DIR: "/cfg",
+      }),
+    ).toMatch(/[/\\]cfg[/\\]contribution-profile-cache\.sqlite3$/);
+  });
+
+  it("creates the table on first use and returns null before any write", () => {
+    const store = tempStore();
+    expect(store.get("acme/widgets")).toBeNull();
+    const db = new DatabaseSync(store.dbPath, { readOnly: true });
+    try {
+      const row = db
+        .prepare(
+          "SELECT name FROM sqlite_master WHERE type='table' AND name = ?",
+        )
+        .get(CONTRIBUTION_PROFILE_STORE_TABLE);
+      expect(row).toEqual({ name: CONTRIBUTION_PROFILE_STORE_TABLE });
+    } finally {
+      db.close();
+    }
+  });
+
+  it("round-trips a stored profile and reports it fresh within the TTL", () => {
+    const store = tempStore();
+    const write = store.put(profile(), AT_MS);
+    expect(write).toEqual({
+      repoFullName: "acme/widgets",
+      fetchedAt: "2026-07-18T00:00:00.000Z",
+    });
+
+    const cached = store.get(
+      "acme/widgets",
+      AT_MS + CONTRIBUTION_PROFILE_CACHE_TTL_MS - 1,
+    );
+    expect(cached).not.toBeNull();
+    expect(cached!.stale).toBe(false);
+    expect(cached!.fetchedAt).toBe("2026-07-18T00:00:00.000Z");
+    expect(cached!.profile).toEqual(profile());
+  });
+
+  it("marks a profile stale once it is older than the TTL", () => {
+    const store = tempStore();
+    store.put(profile(), AT_MS);
+    // Exactly at the TTL boundary is still fresh; one ms past it is stale.
+    expect(
+      store.get("acme/widgets", AT_MS + CONTRIBUTION_PROFILE_CACHE_TTL_MS)!
+        .stale,
+    ).toBe(false);
+    expect(
+      store.get("acme/widgets", AT_MS + CONTRIBUTION_PROFILE_CACHE_TTL_MS + 1)!
+        .stale,
+    ).toBe(true);
+  });
+
+  it("overwrites an existing repo's cached profile on re-put, updating the timestamp", () => {
+    const store = tempStore();
+    store.put(profile(), AT_MS);
+    const later = AT_MS + 60_000;
+    store.put(profile(), later);
+    const cached = store.get("acme/widgets", later);
+    expect(cached!.fetchedAt).toBe(new Date(later).toISOString());
+  });
+
+  it("keeps repos independent — one repo's profile does not leak into another", () => {
+    const store = tempStore();
+    store.put(profile("acme/widgets"), AT_MS);
+    expect(store.get("acme/other", AT_MS)).toBeNull();
+    expect(store.get("acme/widgets", AT_MS)!.profile.repoFullName).toBe(
+      "acme/widgets",
+    );
+  });
+
+  it("fails closed to null on a row whose JSON is corrupt, rather than throwing", () => {
+    const store = tempStore();
+    const db = new DatabaseSync(store.dbPath);
+    db.prepare(
+      `INSERT INTO ${CONTRIBUTION_PROFILE_STORE_TABLE} (repo_full_name, profile_json, fetched_at) VALUES (?, ?, ?)`,
+    ).run("acme/widgets", "{not valid json", "2026-07-18T00:00:00.000Z");
+    db.close();
+    expect(store.get("acme/widgets", AT_MS)).toBeNull();
+  });
+
+  it("fails closed to stale on a row with an unparseable timestamp", () => {
+    const store = tempStore();
+    const db = new DatabaseSync(store.dbPath);
+    db.prepare(
+      `INSERT INTO ${CONTRIBUTION_PROFILE_STORE_TABLE} (repo_full_name, profile_json, fetched_at) VALUES (?, ?, ?)`,
+    ).run("acme/widgets", JSON.stringify(profile()), "not-a-date");
+    db.close();
+    expect(store.get("acme/widgets", AT_MS)!.stale).toBe(true);
+  });
+
+  it("rejects an invalid DB path and invalid repo names before writing", () => {
+    expect(() => initContributionProfileCache("   ")).toThrow(
+      "invalid_contribution_profile_cache_db_path",
+    );
+    const store = tempStore();
+    expect(() => store.get("not-a-full-name")).toThrow(
+      "invalid_repo_full_name",
+    );
+    expect(() =>
+      store.put({ repoFullName: "owner/repo/extra" } as never),
+    ).toThrow("invalid_repo_full_name");
+    expect(() => store.put({ repoFullName: 42 } as never)).toThrow(
+      "invalid_repo_full_name",
+    );
+  });
+
+  it("exposes module-level get/put helpers backed by the default DB path", () => {
+    vi.stubEnv(
+      "LOOPOVER_MINER_CONTRIBUTION_PROFILE_CACHE_DB",
+      join(tempRootForDefault(), "default.sqlite3"),
+    );
+    expect(getCachedContributionProfile("acme/widgets", AT_MS)).toBeNull();
+    putCachedContributionProfile(profile(), AT_MS);
+    expect(
+      getCachedContributionProfile("acme/widgets", AT_MS)!.profile.repoFullName,
+    ).toBe("acme/widgets");
+    // Closing the default store and reading again re-opens it against the same file — the data persists.
+    closeDefaultContributionProfileCache();
+    expect(getCachedContributionProfile("acme/widgets", AT_MS)!.stale).toBe(
+      false,
+    );
+  });
+});
+
+function tempRootForDefault(): string {
+  const root = mkdtempSync(join(tmpdir(), "loopover-miner-cp-cache-default-"));
+  roots.push(root);
+  return root;
+}
diff --git a/test/unit/miner-migrate-cli.test.ts b/test/unit/miner-migrate-cli.test.ts
index 5d5ba15a10..3b9125c7d3 100644
--- a/test/unit/miner-migrate-cli.test.ts
+++ b/test/unit/miner-migrate-cli.test.ts
@@ -29,6 +29,7 @@ const STORE_NAMES = [
   "attempt-log",
   "replay-snapshot",
   "worktree-allocator",
+  "contribution-profile",
 ];
 
 afterEach(() => {
@@ -37,7 +38,7 @@ afterEach(() => {
 });
 
 describe("loopover-miner migrate (#4871)", () => {
-  it("covers the exact same eleven stores doctor's store-integrity sweep covers, in the same order, and skips every one when nothing has been created yet", () => {
+  it("covers the exact same twelve stores doctor's store-integrity sweep covers, in the same order, and skips every one when nothing has been created yet", () => {
     const env = tempEnv();
     const results = runMigrateChecks(env);
 
diff --git a/test/unit/miner-status.test.ts b/test/unit/miner-status.test.ts
index 31524dccf4..921f0017f0 100644
--- a/test/unit/miner-status.test.ts
+++ b/test/unit/miner-status.test.ts
@@ -129,6 +129,7 @@ describe("loopover-miner status/doctor (#2288)", () => {
       "store-integrity:attempt-log",
       "store-integrity:replay-snapshot",
       "store-integrity:worktree-allocator",
+      "store-integrity:contribution-profile",
     ]);
     // REGRESSION (#6768): doctor previously omitted these four durable local stores from the integrity sweep.
     expect(checks.map((check) => check.name)).toEqual(