diff --git a/data/calibrations/.gitignore b/data/calibrations/.gitignore
deleted file mode 100644
index 5c0276a..0000000
--- a/data/calibrations/.gitignore
+++ /dev/null
@@ -1,4 +0,0 @@
-*
-!*/
-!.gitignore
-!.gitkeep
diff --git a/data/calibrations/box/.gitkeep b/data/calibrations/box/.gitkeep
deleted file mode 100644
index 8b13789..0000000
--- a/data/calibrations/box/.gitkeep
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/data/calibrations/finger/.gitkeep b/data/calibrations/finger/.gitkeep
deleted file mode 100644
index 8b13789..0000000
--- a/data/calibrations/finger/.gitkeep
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/data/calibrations/mini/.gitkeep b/data/calibrations/mini/.gitkeep
deleted file mode 100644
index 8b13789..0000000
--- a/data/calibrations/mini/.gitkeep
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/docs/code-review.md b/docs/code-review.md
index 66c7191..3145fc3 100644
--- a/docs/code-review.md
+++ b/docs/code-review.md
@@ -51,7 +51,7 @@ ruff format <changed files>
 
 `$RUFF` may point at a specific ruff binary; otherwise `tools/lint_gate.py` uses `PATH` or the one
 beside the interpreter. **Pin the version**: the gate prints the version it ran, and findings differ
-between versions, so a runner must install the same one the developers use (currently 0.16.9).
+between versions, so a runner must install the same one the developers use (`ruff==0.16.9`).
 
 ## What this found when it was introduced
 
diff --git a/tools/downstream_sync_manifest.json b/tools/downstream_sync_manifest.json
index de240be..7ff2659 100644
--- a/tools/downstream_sync_manifest.json
+++ b/tools/downstream_sync_manifest.json
@@ -8,12 +8,6 @@
         {"from": "docs", "to": "docs", "include": ["get_started.md", "api.md"]},
         {"from": "examples", "to": "examples", "exclude": ["__pycache__", "*.pyc", "*.pyo"]},
         {"from": "config", "to": "config", "include": ["box.json", "finger.json", "mini.json"]},
-        {"from": "data/calibrations", "to": "data/calibrations", "include": [
-          ".gitignore",
-          "box/.gitkeep",
-          "mini/.gitkeep",
-          "finger/.gitkeep"
-        ]},
         {"from": "sensors", "to": "sensors", "include": [
           "box/sensor.json",
           "box/force_calibration.json",