diff --git a/CLAUDE.md b/CLAUDE.md
index a1299ed..5050d2e 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -72,12 +72,9 @@ move.
 
 Soldeer packages, declared in `[dependencies]` in `foundry.toml` and locked in
 `soldeer.lock` (run `forge soldeer update` after changing them). Import paths
-carry the package version (e.g. `rainlang-interface-0.2.3/src/...`). Direct
-deps: `rainlang-interface` (Rainlang interpreter interfaces and caller libs) and
-`rain-math-float` (Float). Soldeer resolution is flat, so `[dependencies]` also
-declares everything `rainlang-interface`'s own src imports
-(`@openzeppelin-contracts`, `rain-lib-hash`, `rain-math-binary`,
-`rain-sol-codegen`, `rain-solmem`).
+carry the package version (e.g. `rainlang-0.2.27/src/...`). Direct deps:
+`rainlang` (Rainlang interpreter interfaces and caller libs, under
+`src/interface/` and `src/lib/caller/`) and `rain-math-float` (Float).
 
 ## Conventions
 
diff --git a/foundry.toml b/foundry.toml
index 4720288..3bd3b89 100644
--- a/foundry.toml
+++ b/foundry.toml
@@ -29,13 +29,8 @@ evm_version = "cancun"
 
 [dependencies]
 forge-std = "1.17.0"
-"rainlang-interface" = "0.2.14"
+rainlang = "0.2.27"
 rain-math-float = "0.3.10"
-"@openzeppelin-contracts" = "5.7.0"
-rain-lib-hash = "0.1.27"
-rain-math-binary = "0.1.4"
-rain-sol-codegen = "0.1.39"
-"rain-solmem" = "0.1.28"
 
 [soldeer]
 recursive_deps = false
diff --git a/remappings.txt b/remappings.txt
index 6612fa5..b653154 100644
--- a/remappings.txt
+++ b/remappings.txt
@@ -1,8 +1,3 @@
-@openzeppelin-contracts-5.7.0/=dependencies/@openzeppelin-contracts-5.7.0/
 forge-std-1.17.0/=dependencies/forge-std-1.17.0/
-rain-lib-hash-0.1.27/=dependencies/rain-lib-hash-0.1.27/
-rain-math-binary-0.1.4/=dependencies/rain-math-binary-0.1.4/
 rain-math-float-0.3.10/=dependencies/rain-math-float-0.3.10/
-rain-sol-codegen-0.1.39/=dependencies/rain-sol-codegen-0.1.39/
-rain-solmem-0.1.28/=dependencies/rain-solmem-0.1.28/
-rainlang-interface-0.2.14/=dependencies/rainlang-interface-0.2.14/
+rainlang-0.2.27/=dependencies/rainlang-0.2.27/
diff --git a/soldeer.lock b/soldeer.lock
index cd5988a..00cc640 100644
--- a/soldeer.lock
+++ b/soldeer.lock
@@ -1,10 +1,3 @@
-[[dependencies]]
-name = "@openzeppelin-contracts"
-version = "5.7.0"
-url = "https://soldeer-revisions.s3.amazonaws.com/@openzeppelin-contracts/5_7_0_29-07-2026_19:34:46_contracts.zip"
-checksum = "fe08a24bc34334b2976c6ad69a0d74bdfa63de8a5c8528579060f25a11fb5cd5"
-integrity = "3e13bc4d96bdef6e35f6b1e0dc0e455843a958edc597750dff20ca50295b767d"
-
 [[dependencies]]
 name = "forge-std"
 version = "1.17.0"
@@ -12,20 +5,6 @@ url = "https://soldeer-revisions.s3.amazonaws.com/forge-std/1_17_0_01-10-2026_10
 checksum = "a77ad38d5fbef0ec10d1f4d191698e5fbaa2bffbee5d1aced91a39da5e9b908c"
 integrity = "fa706c8a7caf3426c90f75e6aafa3224b0a6c899b490800cf6944e4ec42f9344"
 
-[[dependencies]]
-name = "rain-lib-hash"
-version = "0.1.27"
-url = "https://soldeer-revisions.s3.amazonaws.com/rain-lib-hash/0_1_27_16-09-2026_11:52:52_rain.lib.zip"
-checksum = "7a25602d78180e82ac330d1f1b44609589e8efa42d7a3553f926445dbda64256"
-integrity = "ba9fc2ff053bf801fc1b05e5b192fe5b8ade545c408f33874f473bfc39d2d3f0"
-
-[[dependencies]]
-name = "rain-math-binary"
-version = "0.1.4"
-url = "https://soldeer-revisions.s3.amazonaws.com/rain-math-binary/0_1_4_17-08-2026_05:22:01_rain.math.zip"
-checksum = "1787eb0bc883c4922deb5e547ecaf0bd0f9a31e99c51f3b11744c3324eb592f6"
-integrity = "857d22060d058ec173e88448c2d44f0cb884b2381669d0dbe1d3bebb168715ea"
-
 [[dependencies]]
 name = "rain-math-float"
 version = "0.3.10"
@@ -34,22 +13,8 @@ checksum = "81e6c67cc0e2c573784f1c03e70db1ea9537e8161065ded0aaf90bc11b6b6150"
 integrity = "f1509e5fa3a4182b625f4650fb368fe605f76ffcaeaa6fbbf1159346b69f2809"
 
 [[dependencies]]
-name = "rain-sol-codegen"
-version = "0.1.39"
-url = "https://soldeer-revisions.s3.amazonaws.com/rain-sol-codegen/0_1_39_01-10-2026_22:33:18_rain.sol.zip"
-checksum = "356774c9461a4486196d4c7c59f6e6e7099aa567eff4c40bb21ebc5f752f9389"
-integrity = "29de970d9b88ec2eac8a4914a04f76736862b96936aba8b5d61d99189064bbd4"
-
-[[dependencies]]
-name = "rain-solmem"
-version = "0.1.28"
-url = "https://soldeer-revisions.s3.amazonaws.com/rain-solmem/0_1_28_03-09-2026_07:34:16_rain.zip"
-checksum = "3dafbef001edb181683a43c3c295e3f88e2ffcedd751e986562e71e29560c9f0"
-integrity = "e7508cd81a998a67118a0fca314d504dc62850d6b535d29c824f696f214e4b23"
-
-[[dependencies]]
-name = "rainlang-interface"
-version = "0.2.14"
-url = "https://soldeer-revisions.s3.amazonaws.com/rainlang-interface/0_2_14_26-10-2026_13:25:43_rainlang.zip"
-checksum = "854b90ada2a8756d1c3292fa1272c5630fc0ebf48955bf18f60db9d48e4f210e"
-integrity = "d3c5c2983c62b09c3dda643150a3a2a8533c0526fa530b1ded91be69ac64bda5"
+name = "rainlang"
+version = "0.2.27"
+url = "https://soldeer-revisions.s3.amazonaws.com/rainlang/0_2_27_26-10-2026_20:17:13_rainlang.zip"
+checksum = "68fa485bb0587607372755e32e5feba9d017e5100f499aba348c60b9d294d16b"
+integrity = "0f54fd4d675e3e0e5c209c6b75dc37e11b9e4a0a90affea0c0391cb4e4b8dc0e"
diff --git a/src/interface/IRaindexV7.sol b/src/interface/IRaindexV7.sol
index 8a4ecc9..61a01dd 100644
--- a/src/interface/IRaindexV7.sol
+++ b/src/interface/IRaindexV7.sol
@@ -13,7 +13,7 @@ import {
 
     //forge-lint: disable-next-line(unused-import)
     IInterpreterStoreV3
-} from "rainlang-interface-0.2.14/src/interface/IInterpreterCallerV5.sol";
+} from "rainlang-0.2.27/src/interface/IInterpreterCallerV5.sol";
 
 import {
     ClearStateChangeV2,
diff --git a/src/interface/deprecated/v1/IOrderBookV1.sol b/src/interface/deprecated/v1/IOrderBookV1.sol
index af4333f..19e76dc 100644
--- a/src/interface/deprecated/v1/IOrderBookV1.sol
+++ b/src/interface/deprecated/v1/IOrderBookV1.sol
@@ -4,14 +4,14 @@ pragma solidity ^0.8.18;
 
 import {IERC3156FlashLender} from "../../ierc3156/IERC3156FlashLender.sol";
 //forge-lint: disable-next-line(unused-import)
-import {LibEvaluable} from "rainlang-interface-0.2.14/src/lib/caller/LibEvaluable.sol";
+import {LibEvaluable} from "rainlang-0.2.27/src/lib/caller/LibEvaluable.sol";
 import {
     EvaluableConfig,
     Evaluable,
     SignedContext,
     IInterpreterCallerV1
-} from "rainlang-interface-0.2.14/src/interface/deprecated/v1/IInterpreterCallerV1.sol";
-import {IExpressionDeployerV3} from "rainlang-interface-0.2.14/src/interface/deprecated/v1/IExpressionDeployerV3.sol";
+} from "rainlang-0.2.27/src/interface/deprecated/v1/IInterpreterCallerV1.sol";
+import {IExpressionDeployerV3} from "rainlang-0.2.27/src/interface/deprecated/v1/IExpressionDeployerV3.sol";
 
 /// Configuration for a deposit. All deposits are processed by and for
 /// `msg.sender` so the vaults are unambiguous here.
diff --git a/src/interface/deprecated/v2/IOrderBookV2.sol b/src/interface/deprecated/v2/IOrderBookV2.sol
index d358c34..0b2c1f5 100644
--- a/src/interface/deprecated/v2/IOrderBookV2.sol
+++ b/src/interface/deprecated/v2/IOrderBookV2.sol
@@ -3,15 +3,12 @@
 pragma solidity ^0.8.18;
 
 import {IERC3156FlashLender} from "../../ierc3156/IERC3156FlashLender.sol";
-import {
-    EvaluableConfig,
-    Evaluable
-} from "rainlang-interface-0.2.14/src/interface/deprecated/v1/IInterpreterCallerV1.sol";
+import {EvaluableConfig, Evaluable} from "rainlang-0.2.27/src/interface/deprecated/v1/IInterpreterCallerV1.sol";
 import {
     SignedContextV1,
     IInterpreterCallerV2
-} from "rainlang-interface-0.2.14/src/interface/deprecated/v1/IInterpreterCallerV2.sol";
-import {IExpressionDeployerV2} from "rainlang-interface-0.2.14/src/interface/deprecated/v1/IExpressionDeployerV2.sol";
+} from "rainlang-0.2.27/src/interface/deprecated/v1/IInterpreterCallerV2.sol";
+import {IExpressionDeployerV2} from "rainlang-0.2.27/src/interface/deprecated/v1/IExpressionDeployerV2.sol";
 
 /// Configuration for a deposit. All deposits are processed by and for
 /// `msg.sender` so the vaults are unambiguous here.
diff --git a/src/interface/deprecated/v3/IOrderBookV3.sol b/src/interface/deprecated/v3/IOrderBookV3.sol
index 5943653..4a26ac1 100644
--- a/src/interface/deprecated/v3/IOrderBookV3.sol
+++ b/src/interface/deprecated/v3/IOrderBookV3.sol
@@ -8,8 +8,8 @@ import {
     EvaluableConfigV3,
     IInterpreterCallerV2,
     SignedContextV1
-} from "rainlang-interface-0.2.14/src/interface/deprecated/v1/IInterpreterCallerV2.sol";
-import {IExpressionDeployerV3} from "rainlang-interface-0.2.14/src/interface/deprecated/v1/IExpressionDeployerV3.sol";
+} from "rainlang-0.2.27/src/interface/deprecated/v1/IInterpreterCallerV2.sol";
+import {IExpressionDeployerV3} from "rainlang-0.2.27/src/interface/deprecated/v1/IExpressionDeployerV3.sol";
 
 /// Import unmodified structures from older versions of `IOrderBook`.
 import {IO, ClearConfig, ClearStateChange} from "../v2/IOrderBookV2.sol";
diff --git a/src/interface/deprecated/v4/IOrderBookV4.sol b/src/interface/deprecated/v4/IOrderBookV4.sol
index 0b15d9d..3ca110e 100644
--- a/src/interface/deprecated/v4/IOrderBookV4.sol
+++ b/src/interface/deprecated/v4/IOrderBookV4.sol
@@ -13,7 +13,7 @@ import {
 
     //forge-lint: disable-next-line(unused-import)
     IInterpreterStoreV2
-} from "rainlang-interface-0.2.14/src/interface/deprecated/v2/IInterpreterCallerV3.sol";
+} from "rainlang-0.2.27/src/interface/deprecated/v2/IInterpreterCallerV3.sol";
 
 /// Import unmodified structures from older versions of `IOrderBook`.
 import {ClearStateChange, ClearConfig, IO} from "../v3/IOrderBookV3.sol";
diff --git a/src/interface/deprecated/v5/IOrderBookV5.sol b/src/interface/deprecated/v5/IOrderBookV5.sol
index 0fb14a2..d990050 100644
--- a/src/interface/deprecated/v5/IOrderBookV5.sol
+++ b/src/interface/deprecated/v5/IOrderBookV5.sol
@@ -13,7 +13,7 @@ import {
 
     //forge-lint: disable-next-line(unused-import)
     IInterpreterStoreV3
-} from "rainlang-interface-0.2.14/src/interface/deprecated/v3/IInterpreterCallerV4.sol";
+} from "rainlang-0.2.27/src/interface/deprecated/v3/IInterpreterCallerV4.sol";
 
 /// Import unmodified structures from older versions of `IOrderBook`.
 //forge-lint: disable-start(unused-import)
diff --git a/src/interface/deprecated/v6/IRaindexV6.sol b/src/interface/deprecated/v6/IRaindexV6.sol
index 2ff6cc0..5a8b667 100644
--- a/src/interface/deprecated/v6/IRaindexV6.sol
+++ b/src/interface/deprecated/v6/IRaindexV6.sol
@@ -15,7 +15,7 @@ import {
 
     //forge-lint: disable-next-line(unused-import)
     IInterpreterStoreV3
-} from "rainlang-interface-0.2.14/src/interface/deprecated/v3/IInterpreterCallerV4.sol";
+} from "rainlang-0.2.27/src/interface/deprecated/v3/IInterpreterCallerV4.sol";
 
 import {
     ClearStateChangeV2,