diff --git a/scripts/test-find-thread-candidates.mjs b/scripts/test-find-thread-candidates.mjs
index b674317455d..1e62ba60464 100644
--- a/scripts/test-find-thread-candidates.mjs
+++ b/scripts/test-find-thread-candidates.mjs
@@ -44,7 +44,7 @@ export function parseArgs(argv) {
     }
     if (arg === "--min-duration-ms") {
       const parsed = Number.parseFloat(argv[i + 1] ?? "");
-      if (Number.isFinite(parsed) && parsed > 0) {
+      if (Number.isFinite(parsed) && parsed >= 0) {
         args.minDurationMs = parsed;
       }
       i += 1;
@@ -52,7 +52,7 @@ export function parseArgs(argv) {
     }
     if (arg === "--min-gain-ms") {
       const parsed = Number.parseFloat(argv[i + 1] ?? "");
-      if (Number.isFinite(parsed) && parsed > 0) {
+      if (Number.isFinite(parsed) && parsed >= 0) {
         args.minGainMs = parsed;
       }
       i += 1;
diff --git a/test/fixtures/test-parallel.behavior.json b/test/fixtures/test-parallel.behavior.json
index dafa5001cb8..74cdcf50982 100644
--- a/test/fixtures/test-parallel.behavior.json
+++ b/test/fixtures/test-parallel.behavior.json
@@ -341,6 +341,10 @@
         "file": "src/plugins/contracts/wizard.contract.test.ts",
         "reason": "Measured ~9% faster under threads than forks on this host while keeping the file green."
       },
+      {
+        "file": "src/channels/plugins/contracts/outbound-payload.contract.test.ts",
+        "reason": "Measured ~15% faster under threads than forks on this host while keeping the file green."
+      },
       {
         "file": "src/plugins/install.test.ts",
         "reason": "Measured ~18% faster under threads than forks on this host while keeping the file green."
@@ -357,6 +361,18 @@
         "file": "src/config/schema.help.quality.test.ts",
         "reason": "Measured ~13% faster under threads than forks on this host while keeping the file green."
       },
+      {
+        "file": "src/config/sessions/store.pruning.integration.test.ts",
+        "reason": "Measured ~11% faster under threads than forks on this host while keeping the file green."
+      },
+      {
+        "file": "src/config/sessions.test.ts",
+        "reason": "Measured ~16% faster under threads than forks on this host while keeping the file green."
+      },
+      {
+        "file": "src/config/sessions/store.pruning.test.ts",
+        "reason": "Measured ~13% faster under threads than forks on this host while keeping the file green."
+      },
       {
         "file": "src/cron/isolated-agent.uses-last-non-empty-agent-text-as.test.ts",
         "reason": "Measured ~15% faster under threads than forks on this host while keeping the file green."
@@ -365,6 +381,30 @@
         "file": "src/cron/isolated-agent.skips-delivery-without-whatsapp-recipient-besteffortdeliver-true.test.ts",
         "reason": "Measured ~13% faster under threads than forks on this host while keeping the file green."
       },
+      {
+        "file": "src/cron/isolated-agent/run.cron-model-override.test.ts",
+        "reason": "Measured ~25% faster under threads than forks on this host while keeping the file green."
+      },
+      {
+        "file": "src/cron/isolated-agent/run.skill-filter.test.ts",
+        "reason": "Measured ~15% faster under threads than forks on this host while keeping the file green."
+      },
+      {
+        "file": "src/cron/isolated-agent.delivers-response-has-heartbeat-ok-but-includes.test.ts",
+        "reason": "Measured ~12% faster under threads than forks on this host while keeping the file green."
+      },
+      {
+        "file": "src/cron/isolated-agent/delivery-dispatch.named-agent.test.ts",
+        "reason": "Measured ~14% faster under threads than forks on this host while keeping the file green."
+      },
+      {
+        "file": "src/cron/service.store-load-invalid-main-job.test.ts",
+        "reason": "Measured ~16% faster under threads than forks on this host while keeping the file green."
+      },
+      {
+        "file": "src/cron/service.store-migration.test.ts",
+        "reason": "Measured ~14% faster under threads than forks on this host while keeping the file green."
+      },
       {
         "file": "src/plugins/loader.test.ts",
         "reason": "Measured ~13% faster under threads than forks on this host while keeping the file green."
@@ -409,10 +449,22 @@
         "file": "src/infra/outbound/agent-delivery.test.ts",
         "reason": "Measured ~17% faster under threads than forks on this host while keeping the file green."
       },
+      {
+        "file": "src/infra/outbound/outbound-policy.test.ts",
+        "reason": "Measured ~11% faster under threads than forks on this host while keeping the file green."
+      },
+      {
+        "file": "src/infra/update-runner.test.ts",
+        "reason": "Measured ~11% faster under threads than forks on this host while keeping the file green."
+      },
       {
         "file": "src/infra/fs-pinned-write-helper.test.ts",
         "reason": "Measured ~13% faster under threads than forks on this host while keeping the file green."
       },
+      {
+        "file": "src/infra/run-node.test.ts",
+        "reason": "Measured ~9% faster under threads than forks on this host while keeping the file green."
+      },
       {
         "file": "src/infra/fs-safe.test.ts",
         "reason": "Measured ~17% faster under threads than forks on this host while keeping the file green."
@@ -421,6 +473,10 @@
         "file": "src/infra/archive-staging.test.ts",
         "reason": "Measured ~12% faster under threads than forks on this host while keeping the file green."
       },
+      {
+        "file": "src/infra/state-migrations.test.ts",
+        "reason": "Measured ~17% faster under threads than forks on this host while keeping the file green."
+      },
       {
         "file": "src/acp/server.startup.test.ts",
         "reason": "Measured ~11% faster under threads than forks on this host while keeping the file green."
@@ -429,6 +485,10 @@
         "file": "src/acp/client.test.ts",
         "reason": "Measured ~18% faster under threads than forks on this host while keeping the file green."
       },
+      {
+        "file": "src/acp/translator.cancel-scoping.test.ts",
+        "reason": "Measured ~10% faster under threads than forks on this host while keeping the file green."
+      },
       {
         "file": "src/daemon/schtasks.startup-fallback.test.ts",
         "reason": "Measured ~15% faster under threads than forks on this host while keeping the file green."
@@ -461,6 +521,10 @@
         "file": "ui/src/ui/views/chat.test.ts",
         "reason": "Measured ~25% faster under threads than forks on this host while keeping the file green."
       },
+      {
+        "file": "src/tui/tui-session-actions.test.ts",
+        "reason": "Measured ~11% faster under threads than forks on this host while keeping the file green."
+      },
       {
         "file": "src/cli/program/preaction.test.ts",
         "reason": "Measured ~21% faster under threads than forks on this host while keeping the file green."
diff --git a/test/scripts/test-find-thread-candidates.test.ts b/test/scripts/test-find-thread-candidates.test.ts
index 9f79cd1c4a7..fff07561696 100644
--- a/test/scripts/test-find-thread-candidates.test.ts
+++ b/test/scripts/test-find-thread-candidates.test.ts
@@ -31,6 +31,13 @@ describe("scripts/test-find-thread-candidates parseArgs", () => {
       files: ["src/a.test.ts"],
     });
   });
+
+  it("accepts zero thresholds for explicit deep scans", () => {
+    expect(parseArgs(["--min-duration-ms", "0", "--min-gain-ms", "0"])).toMatchObject({
+      minDurationMs: 0,
+      minGainMs: 0,
+    });
+  });
 });
 
 describe("scripts/test-find-thread-candidates exclusions", () => {