diff --git a/.github/.ci-trigger-marker b/.github/.ci-trigger-marker
deleted file mode 100644
index 7573e8aa..00000000
--- a/.github/.ci-trigger-marker
+++ /dev/null
@@ -1,6 +0,0 @@
-# CI re-trigger marker
-# Touched 2026-05-08 to fire Tests + Nix workflows after operator host
-# disk pressure relief (99% → 79%). Last run had ENOSPC errors that
-# masked which test failures are real vs env-induced.
-#
-# Safe to delete after confirming a clean run.
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index a92afdfa..5365d345 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -32,7 +32,17 @@ jobs:
         run: sudo apt-get update && sudo apt-get install -y ripgrep
 
       - name: Install uv
+        # Pin uv version explicitly so setup-uv constructs the release
+        # download URL directly instead of resolving "latest" via the
+        # GitHub REST API. The operator host's anon IP (5.78.80.188)
+        # is anonymous-rate-limited at GitHub post-2026-05-06 (no org
+        # PAT available — see internal#79). Without the pin, the
+        # action's `octokit.repos.getLatestRelease()` call hits the
+        # 60-req/hr cap and fails Install uv with "API rate limit
+        # exceeded". With a pin, no API call is needed.
         uses: astral-sh/setup-uv@d4b2f3b6ecc6e67c4457f6d3e41ec42d3d0fcb86  # v5
+        with:
+          version: "0.11.11"
 
       - name: Set up Python 3.11
         run: uv python install 3.11
@@ -61,7 +71,17 @@ jobs:
         uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4
 
       - name: Install uv
+        # Pin uv version explicitly so setup-uv constructs the release
+        # download URL directly instead of resolving "latest" via the
+        # GitHub REST API. The operator host's anon IP (5.78.80.188)
+        # is anonymous-rate-limited at GitHub post-2026-05-06 (no org
+        # PAT available — see internal#79). Without the pin, the
+        # action's `octokit.repos.getLatestRelease()` call hits the
+        # 60-req/hr cap and fails Install uv with "API rate limit
+        # exceeded". With a pin, no API call is needed.
         uses: astral-sh/setup-uv@d4b2f3b6ecc6e67c4457f6d3e41ec42d3d0fcb86  # v5
+        with:
+          version: "0.11.11"
 
       - name: Set up Python 3.11
         run: uv python install 3.11