diff --git a/lib/microwaveprop/release.ex b/lib/microwaveprop/release.ex
index 7b2d9947..2f41dd5c 100644
--- a/lib/microwaveprop/release.ex
+++ b/lib/microwaveprop/release.ex
@@ -1,7 +1,15 @@
 defmodule Microwaveprop.Release do
   @moduledoc """
-  Used for executing DB release tasks when run in production without Mix
-  installed.
+  Release tasks that run in production without Mix installed.
+
+  Usage via `bin/microwaveprop eval`:
+
+      bin/microwaveprop eval "Microwaveprop.Release.migrate"
+      bin/microwaveprop eval "Microwaveprop.Release.backtest_all"
+      bin/microwaveprop eval "Microwaveprop.Release.backtest(\"naive_gradient\")"
+      bin/microwaveprop eval "Microwaveprop.Release.climatology"
+      bin/microwaveprop eval "Microwaveprop.Release.native_backfill(500)"
+      bin/microwaveprop eval "Microwaveprop.Release.native_derive"
   """
   @app :microwaveprop
 
@@ -18,13 +26,243 @@ defmodule Microwaveprop.Release do
     {:ok, _, _} = Ecto.Migrator.with_repo(repo, &Ecto.Migrator.run(&1, :down, to: version))
   end
 
+  @doc """
+  Run a single feature backtest. Prints markdown report to stdout.
+  """
+  def backtest(feature_name) when is_binary(feature_name) do
+    start_app()
+
+    alias Microwaveprop.Backtest
+    alias Microwaveprop.Backtest.Features
+
+    fun_atom = String.to_atom(feature_name)
+
+    unless function_exported?(Features, fun_atom, 3) do
+      available =
+        Features.__info__(:functions)
+        |> Enum.filter(fn {_, a} -> a == 3 end)
+        |> Enum.map_join(", ", fn {f, _} -> to_string(f) end)
+
+      IO.puts("Unknown feature: #{feature_name}\nAvailable: #{available}")
+      System.halt(1)
+    end
+
+    feature_fun = &apply(Features, fun_atom, [&1, &2, &3])
+    name = "Microwaveprop.Backtest.Features.#{feature_name}"
+
+    report = Backtest.evaluate(feature_fun, sample_size: 5000, feature_name: name)
+    distance_bins = Backtest.lift_by_distance(feature_fun, sample_size: 5000)
+    band_stats = Backtest.lift_by_band(feature_fun, sample_size: 5000)
+
+    IO.puts(Backtest.to_markdown(report, distance_bins: distance_bins, band_stats: band_stats))
+  end
+
+  @doc """
+  Run consolidated backtest across all features. Prints markdown to stdout.
+  """
+  def backtest_all do
+    start_app()
+
+    alias Microwaveprop.Backtest
+    alias Microwaveprop.Backtest.Features
+
+    features = Features.all_features()
+    IO.puts("Running consolidated backtest for #{map_size(features)} features...")
+
+    results = Backtest.consolidated_report(features, sample_size: 5000)
+    IO.puts(Backtest.to_consolidated_markdown(results))
+  end
+
+  @doc """
+  Build surface temperature climatology from hrrr_profiles.
+  """
+  def climatology(min_samples \\ 3) do
+    start_app()
+
+    alias Microwaveprop.Repo
+
+    %{rows: combos} =
+      Repo.query!(
+        """
+        SELECT EXTRACT(MONTH FROM valid_time)::int AS month,
+               EXTRACT(HOUR FROM valid_time)::int AS hour
+        FROM hrrr_profiles
+        WHERE surface_temp_c IS NOT NULL AND is_grid_point = true
+        GROUP BY 1, 2
+        ORDER BY 1, 2
+        """,
+        [],
+        timeout: 120_000
+      )
+
+    IO.puts("Building climatology (min_samples=#{min_samples}, #{length(combos)} batches)...")
+
+    total =
+      combos
+      |> Enum.with_index(1)
+      |> Enum.reduce(0, fn {[month, hour], idx}, acc ->
+        %{num_rows: count} =
+          Repo.query!(
+            """
+            INSERT INTO hrrr_climatology (id, lat, lon, month, hour,
+                                          mean_surface_temp_c, stddev_surface_temp_c, sample_count)
+            SELECT gen_random_uuid(), lat, lon,
+                   $2 AS month,
+                   $3 AS hour,
+                   AVG(surface_temp_c),
+                   STDDEV_SAMP(surface_temp_c),
+                   COUNT(*)
+            FROM hrrr_profiles
+            WHERE surface_temp_c IS NOT NULL
+              AND is_grid_point = true
+              AND EXTRACT(MONTH FROM valid_time)::int = $2
+              AND EXTRACT(HOUR FROM valid_time)::int = $3
+            GROUP BY lat, lon
+            HAVING COUNT(*) >= $1
+            ON CONFLICT (lat, lon, month, hour)
+            DO UPDATE SET
+              mean_surface_temp_c = EXCLUDED.mean_surface_temp_c,
+              stddev_surface_temp_c = EXCLUDED.stddev_surface_temp_c,
+              sample_count = EXCLUDED.sample_count
+            """,
+            [min_samples, month, hour],
+            timeout: 300_000
+          )
+
+        IO.puts("  [#{idx}/#{length(combos)}] month=#{month} hour=#{hour}: #{count} rows")
+        acc + count
+      end)
+
+    IO.puts("Upserted #{total} climatology records total.")
+  end
+
+  @doc """
+  Enqueue native HRRR backfill jobs for the top-N hours by contact count.
+  """
+  def native_backfill(limit \\ 500) do
+    start_app()
+
+    alias Microwaveprop.Repo
+
+    %{rows: rows} =
+      Repo.query!(
+        """
+        SELECT EXTRACT(YEAR FROM qso_timestamp)::int AS year,
+               EXTRACT(MONTH FROM qso_timestamp)::int AS month,
+               EXTRACT(DAY FROM qso_timestamp)::int AS day,
+               EXTRACT(HOUR FROM qso_timestamp)::int AS hour,
+               COUNT(*) AS cnt
+        FROM contacts
+        WHERE pos1 IS NOT NULL
+          AND qso_timestamp >= '2019-01-01'
+        GROUP BY 1, 2, 3, 4
+        ORDER BY cnt DESC
+        LIMIT $1
+        """,
+        [limit],
+        timeout: 60_000
+      )
+
+    IO.puts("Enqueuing #{length(rows)} native backfill jobs...")
+
+    for [year, month, day, hour, cnt] <- rows do
+      args = %{year: year, month: month, day: day, hour: hour}
+
+      case Oban.insert(
+             Microwaveprop.Workers.HrrrNativeGridWorker.new(args, unique: [period: :infinity])
+           ) do
+        {:ok, _} -> IO.puts("  #{year}-#{month}-#{day} #{hour}Z (#{cnt} contacts)")
+        {:error, _} -> IO.puts("  #{year}-#{month}-#{day} #{hour}Z (skipped, already enqueued)")
+      end
+    end
+
+    IO.puts("Done.")
+  end
+
+  @doc """
+  Compute derived fields (inversion, Ri, ducts) on native profiles that lack them.
+  """
+  def native_derive(limit \\ 10_000) do
+    start_app()
+
+    import Ecto.Query
+
+    alias Microwaveprop.Propagation.Duct
+    alias Microwaveprop.Propagation.Inversion
+    alias Microwaveprop.Repo
+    alias Microwaveprop.Weather.HrrrNativeProfile
+    alias Microwaveprop.Weather.ThetaE
+
+    profiles =
+      HrrrNativeProfile
+      |> where([p], is_nil(p.bulk_richardson) and p.level_count > 2)
+      |> limit(^limit)
+      |> Repo.all()
+
+    IO.puts("Deriving fields for #{length(profiles)} profiles...")
+
+    count =
+      Enum.count(profiles, fn profile ->
+        p = %{
+          heights_m: profile.heights_m,
+          temp_k: profile.temp_k,
+          spfh: profile.spfh,
+          pressure_pa: profile.pressure_pa,
+          u_wind_ms: profile.u_wind_ms,
+          v_wind_ms: profile.v_wind_ms,
+          tke_m2s2: profile.tke_m2s2,
+          level_count: profile.level_count
+        }
+
+        inversion_fields =
+          case Inversion.find_inversion_top(p) do
+            {:ok, %{height_m: top_h, level_idx: top_idx, base_idx: base_idx}} ->
+              ri = Inversion.bulk_richardson(p, base_idx, top_idx)
+              shear = Inversion.shear_magnitude(p, base_idx, top_idx)
+              theta_e_jump = ThetaE.theta_e_jump(p, base_idx, top_idx)
+
+              [
+                inversion_top_m: top_h,
+                bulk_richardson: ri,
+                shear_at_top_ms: shear,
+                theta_e_jump_k: theta_e_jump
+              ]
+
+            :none ->
+              [
+                inversion_top_m: nil,
+                bulk_richardson: nil,
+                shear_at_top_ms: nil,
+                theta_e_jump_k: nil
+              ]
+          end
+
+        duct_result = Duct.analyze(p)
+        duct_fields = [ducts: duct_result.ducts, best_duct_band_ghz: duct_result.best_duct_band_ghz]
+        fields = inversion_fields ++ duct_fields
+
+        {1, _} =
+          HrrrNativeProfile
+          |> where([pr], pr.id == ^profile.id)
+          |> Repo.update_all(set: fields)
+
+        true
+      end)
+
+    IO.puts("Updated #{count} profiles with derived fields.")
+  end
+
   defp repos do
     Application.fetch_env!(@app, :ecto_repos)
   end
 
   defp load_app do
-    # Many platforms require SSL when connecting to the database
     Application.ensure_all_started(:ssl)
     Application.ensure_loaded(@app)
   end
+
+  defp start_app do
+    Application.ensure_all_started(@app)
+    Oban.pause_all_queues(Oban)
+  end
 end