diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,26 @@
 
 ## Unreleased
 
+## 0.3.1.0 — 2026-07-22
+
+### New Features
+
+* `Kiroku.Store.Effect.Resource.runKirokuStoreWith` installs an already-acquired
+  `KirokuStore` into the effect stack without acquiring or releasing it — the
+  caller owns the handle's lifetime. Processes that open exactly one store, the
+  arrangement `KirokuStoreResource` already documents, can now run several
+  independent effectful actions against that one handle.
+
+  Previously the only runner was `withKirokuStore`, which acquires. A caller
+  that already held an open store but ran many actions through it paid for a
+  connection pool, a dedicated `LISTEN` connection, and a publisher thread on
+  every action. Switching one such caller to the new runner cut a
+  command-line invocation from 5 PostgreSQL connections to 3.
+
+  Note that `runKirokuStoreWith` requires `IOE` even though it neither brackets
+  nor unlifts: `KirokuStoreResource` is a `Static WithSideEffects` effect, and
+  `evalStaticRep` demands `IOE` for those.
+
 ## 0.3.0.1 — 2026-07-14
 
 ### Bug Fixes
diff --git a/kiroku-store.cabal b/kiroku-store.cabal
--- a/kiroku-store.cabal
+++ b/kiroku-store.cabal
@@ -1,6 +1,6 @@
 cabal-version:   3.0
 name:            kiroku-store
-version:         0.3.0.1
+version:         0.3.1.0
 synopsis:        High-performance PostgreSQL event store
 description:
   Kiroku is a PostgreSQL-backed event store for Haskell applications. It
diff --git a/src/Kiroku/Store/Effect/Resource.hs b/src/Kiroku/Store/Effect/Resource.hs
--- a/src/Kiroku/Store/Effect/Resource.hs
+++ b/src/Kiroku/Store/Effect/Resource.hs
@@ -9,6 +9,9 @@
 
     -- * Bracket-style runner
     withKirokuStore,
+
+    -- * Runner over an existing handle
+    runKirokuStoreWith,
 ) where
 
 import Effectful (Dispatch (..), DispatchOf, Eff, Effect, IOE, UnliftStrategy (..), withEffToIO, (:>))
@@ -52,3 +55,22 @@
 withKirokuStore settings action = withEffToIO SeqUnlift $ \unlift ->
     withStore settings $ \store ->
         unlift (evalStaticRep (KirokuStoreResource store) action)
+
+{- | Install an /already acquired/ 'KirokuStore' into the effect stack.
+
+Unlike 'withKirokuStore', this neither acquires nor releases: the caller owns
+the handle's lifetime. Use it when a process has opened exactly one store (the
+documented arrangement) and needs to run several independent effectful actions
+against it. Acquiring a store per action instead costs a connection pool, a
+dedicated @LISTEN@ connection, and a publisher thread each time.
+
+There is no bracket and no unlifting here, but @IOE@ is still required:
+'KirokuStoreResource' is @Static WithSideEffects@, and 'evalStaticRep' demands
+@IOE@ for any effect declared that way.
+-}
+runKirokuStoreWith ::
+    (IOE :> es) =>
+    KirokuStore ->
+    Eff (KirokuStoreResource : es) a ->
+    Eff es a
+runKirokuStoreWith = evalStaticRep . KirokuStoreResource