diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+## 0.1.3.1 — 2026-10-05
+
+- Move the dependency on `mori://shinzui/baikai/packages/baikai` to `>=0.7.1.0 && <0.8` and widen the `effectful` bound to `>=2.6 && <2.8`, so both effectful 2.6 and 2.7 are supported (effectful 2.7 needs `baikai-effectful` 0.4.0.2, effectful 2.6 needs 0.4.0.1). Bounds only; no source changed.
+
 ## 0.1.3.0 — 2026-09-08
 
 - Raise the internal `shikumi-cache` bound to `^>=0.2.0.0` for the breaking cache release.
diff --git a/shikumi-cache-redis.cabal b/shikumi-cache-redis.cabal
--- a/shikumi-cache-redis.cabal
+++ b/shikumi-cache-redis.cabal
@@ -1,8 +1,8 @@
-cabal-version:   3.4
-name:            shikumi-cache-redis
-version:         0.1.3.0
-synopsis:        Redis-backed shikumi cache (EP-6)
-category:        AI
+cabal-version: 3.4
+name: shikumi-cache-redis
+version: 0.1.3.1
+synopsis: Redis-backed shikumi cache (EP-6)
+category: AI
 description:
   A Redis backend for shikumi's @Cache@ effect (EP-6), kept in a separate
   package so the heavy @hedis@ client and a running Redis server are only
@@ -11,20 +11,26 @@
   a @CachedResponse@ (the @Response@ round-trip comes from @shikumi-cache@'s
   @Shikumi.Cache.ResponseJSON@).
 
-license:         BSD-3-Clause
-author:          Nadeem Bitar
-maintainer:      nadeem@gmail.com
-build-type:      Simple
+license: BSD-3-Clause
+author: Nadeem Bitar
+maintainer: nadeem@gmail.com
+build-type: Simple
 extra-doc-files: CHANGELOG.md
 
 common common-options
   ghc-options:
-    -Wall -Wcompat -Widentities -Wincomplete-uni-patterns
-    -Wincomplete-record-updates -Wredundant-constraints
-    -fhide-source-paths -Wmissing-export-lists -Wpartial-fields
+    -Wall
+    -Wcompat
+    -Widentities
+    -Wincomplete-uni-patterns
+    -Wincomplete-record-updates
+    -Wredundant-constraints
+    -fhide-source-paths
+    -Wmissing-export-lists
+    -Wpartial-fields
     -Wmissing-deriving-strategies
 
-  default-language:   GHC2024
+  default-language: GHC2024
   default-extensions:
     DeriveAnyClass
     DuplicateRecordFields
@@ -32,37 +38,40 @@
     OverloadedStrings
 
 library
-  import:          common-options
-  hs-source-dirs:  src
+  import: common-options
+  hs-source-dirs: src
   exposed-modules: Shikumi.Cache.Backend.Redis
   build-depends:
-    , aeson          >=2.2      && <2.3
-    , base           >=4.20     && <5
-    , bytestring     >=0.11     && <0.13
-    , effectful      >=2.5      && <2.7
-    , hedis          >=0.15     && <0.17
-    , shikumi-cache  ^>=0.2.0.0
-    , text           ^>=2.1
+    aeson >=2.2 && <2.3,
+    base >=4.20 && <5,
+    bytestring >=0.11 && <0.13,
+    effectful >=2.6 && <2.8,
+    hedis >=0.15 && <0.17,
+    shikumi-cache ^>=0.2.0.1,
+    text ^>=2.1,
 
 test-suite shikumi-cache-redis-test
-  import:         common-options
-  type:           exitcode-stdio-1.0
+  import: common-options
+  type: exitcode-stdio-1.0
   hs-source-dirs: test
-  main-is:        Main.hs
-  ghc-options:    -threaded -with-rtsopts=-N
+  main-is: Main.hs
+  ghc-options:
+    -threaded
+    -with-rtsopts=-N
+
   build-depends:
-    , baikai               >=0.7.0.0  && <0.8
-    , base
-    , bytestring
-    , effectful
-    , generic-lens
-    , hedis
-    , lens
-    , shikumi              ^>=0.4.0.0
-    , shikumi-cache        ^>=0.2.0.0
-    , shikumi-cache-redis  ^>=0.1.3.0
-    , tasty
-    , tasty-hunit
-    , text
-    , time
-    , vector
+    baikai >=0.7.1.0 && <0.8,
+    base,
+    bytestring,
+    effectful,
+    generic-lens,
+    hedis,
+    lens,
+    shikumi ^>=0.4.0.0,
+    shikumi-cache ^>=0.2.0.1,
+    shikumi-cache-redis ^>=0.1.3.1,
+    tasty,
+    tasty-hunit,
+    text,
+    time,
+    vector,
diff --git a/src/Shikumi/Cache/Backend/Redis.hs b/src/Shikumi/Cache/Backend/Redis.hs
--- a/src/Shikumi/Cache/Backend/Redis.hs
+++ b/src/Shikumi/Cache/Backend/Redis.hs
@@ -6,7 +6,7 @@
 -- string key @shikumi:cache:\<hex\>@ (the @shikumi:cache:@ prefix is operational
 -- namespacing, outside the content hash). By default entries have no Redis-side
 -- expiry; callers that want Redis to bound storage can opt into @SETEX@ with
--- 'openRedisCacheWithTTL'. The value is the UTF-8 JSON of a 'CachedResponse';
+-- 'openRedisCacheWithTTL'. The value is the UTF-8 JSON of a t'Shikumi.Cache.Types.CachedResponse';
 -- the baikai 'Baikai.Response.Response' round-trip is the one from
 -- @shikumi-cache@ ("Shikumi.Cache.ResponseJSON").
 module Shikumi.Cache.Backend.Redis
@@ -43,7 +43,7 @@
 defaultRedisTTL = 7 * 24 * 60 * 60
 
 -- | Connect to Redis (verifying the connection eagerly via @checkedConnect@)
--- with no Redis-side expiry. Throws 'R.ConnectError' if the server is
+-- with no Redis-side expiry. Throws t'Database.Redis.ConnectError' if the server is
 -- unreachable.
 openRedisCache :: R.ConnectInfo -> IO RedisCache
 openRedisCache ci = do
@@ -51,7 +51,7 @@
   pure (RedisCache conn Nothing)
 
 -- | As 'openRedisCache' but with an explicit Redis-side per-entry TTL (seconds).
--- This bounds Redis storage independently of the policy-layer 'CacheConfig'
+-- This bounds Redis storage independently of the policy-layer 'Shikumi.Cache.CacheConfig'
 -- expiry in @shikumi-cache@.
 openRedisCacheWithTTL :: Integer -> R.ConnectInfo -> IO RedisCache
 openRedisCacheWithTTL ttl ci = do