diff --git a/.circleci/config.yml b/.circleci/config.yml
index e7b5f023fba..2e01af9891a 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -70,7 +70,7 @@ commands:
     steps:
     - checkout
     - concat_files:
-        glob: "*/*.csproj"
+        glob: "{src,test,tools}/*/*.csproj"
         to: .combined-package-files.txt
     - restore_cache:
         keys:
@@ -105,14 +105,18 @@ commands:
         root: .
         paths:
         - <<parameters.collect_tests_to>>
-        - "*/bin/"
-        - "*/obj/"
+        - "src/*/bin/"
+        - "src/*/obj/"
+        - "test/*/bin/"
+        - "test/*/obj/"
+        - "tools/*/bin/"
+        - "tools/*/obj/"
 
   mono_build_base:
     steps:
     - checkout
     - concat_files:
-        glob: "*/*.csproj"
+        glob: "{src,test,tools}/*/*.csproj"
         to: .combined-package-files.txt
     - restore_cache:
         keys:
diff --git a/.github/bin/constants.sh b/.github/bin/constants.sh
index 8c1f33f214f..c7ebeb043e3 100644
--- a/.github/bin/constants.sh
+++ b/.github/bin/constants.sh
@@ -3,29 +3,29 @@
 # shellcheck disable=SC2034
 solution="Libplanet"
 projects=(
-  "Libplanet"
-  "Libplanet.Action"
-  "Libplanet.Common"
-  "Libplanet.Crypto"
-  "Libplanet.Crypto.Secp256k1"
-  "Libplanet.Mocks"
-  "Libplanet.Net"
-  "Libplanet.Store"
-  "Libplanet.Store.Remote"
-  "Libplanet.Stun"
-  "Libplanet.Types"
-  "Libplanet.RocksDBStore"
-  "Libplanet.Analyzers"
-  "Libplanet.Tools"
-  "Libplanet.Explorer"
-  "Libplanet.Explorer.Executable"
-  "Libplanet.Explorer.Cocona"
-  "Libplanet.Extensions.Cocona"
+  "src/Libplanet"
+  "src/Libplanet.Action"
+  "src/Libplanet.Common"
+  "src/Libplanet.Crypto"
+  "src/Libplanet.Crypto.Secp256k1"
+  "src/Libplanet.Net"
+  "src/Libplanet.Store"
+  "src/Libplanet.Store.Remote"
+  "src/Libplanet.Stun"
+  "src/Libplanet.Types"
+  "src/Libplanet.RocksDBStore"
+  "test/Libplanet.Mocks"
+  "tools/Libplanet.Analyzers"
+  "tools/Libplanet.Tools"
+  "tools/Libplanet.Explorer"
+  "tools/Libplanet.Explorer.Executable"
+  "tools/Libplanet.Explorer.Cocona"
+  "tools/Libplanet.Extensions.Cocona"
 )
 configuration=Release
 executables=(
-  "Libplanet.Tools"
-  "Libplanet.Explorer.Executable"
+  "tools/Libplanet.Tools"
+  "tools/Libplanet.Explorer.Executable"
 )
 npm_packages=(
   "@planetarium/cli"
diff --git a/.github/workflows/benchmarks-pr.yml b/.github/workflows/benchmarks-pr.yml
index d685778c847..e40ad9763a1 100644
--- a/.github/workflows/benchmarks-pr.yml
+++ b/.github/workflows/benchmarks-pr.yml
@@ -26,7 +26,7 @@ jobs:
       with:
         dotnet-version: 6.0.x
     - name: Run benchmark
-      run: dotnet run --project Libplanet.Benchmarks -c Release -- --exporters json --filter '*'
+      run: dotnet run --project tools/Libplanet.Benchmarks -c Release -- --exporters json --filter '*'
 
     - name: Compare benchmark result
       uses: planetarium/github-action-benchmark@v1
diff --git a/.github/workflows/yarn.yaml b/.github/workflows/yarn.yaml
index b0cef87c74f..efd11b02cb6 100644
--- a/.github/workflows/yarn.yaml
+++ b/.github/workflows/yarn.yaml
@@ -61,7 +61,7 @@ jobs:
     - if: runner.os != 'Windows'
       run: |
         set -ev
-        cd Libplanet.Tools/
+        cd tools/Libplanet.Tools/
         bin/npm-test.sh "$LATEST_VERSION"
       env:
         LATEST_VERSION: ${{ steps.latest-tag.outputs.tag }}
@@ -69,7 +69,7 @@ jobs:
       shell: pwsh
       run: |
         $ErrorActionPreference = "Stop"
-        cd Libplanet.Tools\
+        cd tools\Libplanet.Tools\
         pwsh `
           -ExecutionPolicy Bypass `
           -File bin\npm-test.ps1 `
diff --git a/@planetarium/cli b/@planetarium/cli
index 059870b2cdb..d16b8cf53dc 120000
--- a/@planetarium/cli
+++ b/@planetarium/cli
@@ -1 +1 @@
-../Libplanet.Tools
\ No newline at end of file
+../tools/Libplanet.Tools
\ No newline at end of file
diff --git a/@planetarium/tx/package.json b/@planetarium/tx/package.json
index 1a5d44b5bbd..7723ed0ec1a 100644
--- a/@planetarium/tx/package.json
+++ b/@planetarium/tx/package.json
@@ -21,8 +21,8 @@
   "scripts": {
     "build": "yarn && nanobundle build",
     "prepack": "yarn && yarn build",
-    "dev": "yarn && dotnet build ../../Libplanet.Tools && vitest",
-    "test": "yarn && yarn run -T tsc -p tsconfig.json && dotnet build ../../Libplanet.Tools && vitest run",
+    "dev": "yarn && dotnet build ../../tools/Libplanet.Tools && vitest",
+    "test": "yarn && yarn run -T tsc -p tsconfig.json && dotnet build ../../tools/Libplanet.Tools && vitest run",
     "coverage": "yarn && vitest run --coverage"
   },
   "repository": {
diff --git a/@planetarium/tx/test/tx/signed.test.ts b/@planetarium/tx/test/tx/signed.test.ts
index c3d47916c09..7252944b22e 100644
--- a/@planetarium/tx/test/tx/signed.test.ts
+++ b/@planetarium/tx/test/tx/signed.test.ts
@@ -1,10 +1,10 @@
-import { encodeSignedTx, signTx } from "../../src/tx/signed";
-import { type UnsignedTx } from "../../src/tx/unsigned";
-import { account1, address1 } from "./fixtures";
+import { join } from "node:path";
 import { RecordView, encode } from "@planetarium/bencodex";
 import { execa } from "execa";
-import { join } from "node:path";
 import { describe, expect, test } from "vitest";
+import { encodeSignedTx, signTx } from "../../src/tx/signed";
+import { type UnsignedTx } from "../../src/tx/unsigned";
+import { account1, address1 } from "./fixtures";
 
 describe("signTx", () => {
   test("UnsignedTx", async () => {
@@ -30,28 +30,28 @@ describe("signTx", () => {
                       minters: [
                         Buffer.from(
                           "47d082a115c63e7b58b1532d20e631538eafadde",
-                          "hex",
+                          "hex"
                         ),
                       ],
                       ticker: "NCG",
                     },
-                    "text",
+                    "text"
                   ),
                   1000n,
                 ],
                 recipient: Buffer.from(
                   "5a533067D0cBa77490268b26195EdB10B990143D",
-                  "hex",
+                  "hex"
                 ),
                 sender: Buffer.from(
                   "111CB8E18c6D70f5032000c5739c5ac36E793EDB",
-                  "hex",
+                  "hex"
                 ),
               },
-              "text",
+              "text"
             ),
           },
-          "text",
+          "text"
         ),
       ],
     };
@@ -64,13 +64,13 @@ describe("signTx", () => {
         "run",
         "--no-build",
         "--project",
-        join(__dirname, "..", "..", "..", "..", "Libplanet.Tools"),
+        join(__dirname, "..", "..", "..", "..", "tools", "Libplanet.Tools"),
         "--",
         "tx",
         "analyze",
         "-",
       ],
-      { input: payload },
+      { input: payload }
     );
     expect(JSON.parse(stdout)).toStrictEqual({
       id: "49a645bb80fa96757009615ec33bc15a2e90e9121877de9f14de35b7d657a118",
diff --git a/@planetarium/tx/test/tx/unsigned.test.ts b/@planetarium/tx/test/tx/unsigned.test.ts
index be972f20c0d..48ac83caa04 100644
--- a/@planetarium/tx/test/tx/unsigned.test.ts
+++ b/@planetarium/tx/test/tx/unsigned.test.ts
@@ -1,9 +1,9 @@
-import { encodeUnsignedTx } from "../../src/tx/unsigned";
-import { key1 } from "./fixtures";
+import { join } from "node:path";
 import { RecordView, encode } from "@planetarium/bencodex";
 import { execa } from "execa";
-import { join } from "node:path";
 import { expect, test } from "vitest";
+import { encodeUnsignedTx } from "../../src/tx/unsigned";
+import { key1 } from "./fixtures";
 
 test("encodeUnsignedTx", async () => {
   const encoded = encodeUnsignedTx({
@@ -28,25 +28,25 @@ test("encodeUnsignedTx", async () => {
                     new Uint8Array(
                       Buffer.from(
                         "47d082a115c63e7b58b1532d20e631538eafadde",
-                        "hex",
-                      ),
+                        "hex"
+                      )
                     ),
                   ],
                   ticker: "NCG",
                 },
-                "text",
+                "text"
               ),
               1000n,
             ],
             recipient: new Uint8Array(
-              Buffer.from("5a533067D0cBa77490268b26195EdB10B990143D", "hex"),
+              Buffer.from("5a533067D0cBa77490268b26195EdB10B990143D", "hex")
             ),
             sender: new Uint8Array(
-              Buffer.from("111CB8E18c6D70f5032000c5739c5ac36E793EDB", "hex"),
+              Buffer.from("111CB8E18c6D70f5032000c5739c5ac36E793EDB", "hex")
             ),
           },
         },
-        "text",
+        "text"
       ),
     ],
   });
@@ -57,7 +57,7 @@ test("encodeUnsignedTx", async () => {
       "run",
       "--no-build",
       "--project",
-      join(__dirname, "..", "..", "..", "..", "Libplanet.Tools"),
+      join(__dirname, "..", "..", "..", "..", "tools", "Libplanet.Tools"),
       "--",
       "tx",
       "analyze",
@@ -66,7 +66,7 @@ test("encodeUnsignedTx", async () => {
     ],
     {
       input: Buffer.from(payload),
-    },
+    }
   );
   expect(JSON.parse(stdout)).toStrictEqual({
     nonce: 123,
diff --git a/Docs/docfx.json b/Docs/docfx.json
index 09f560a223b..dffea54a550 100644
--- a/Docs/docfx.json
+++ b/Docs/docfx.json
@@ -4,20 +4,20 @@
       "src": [
         {
           "files": [
-            "Libplanet/Libplanet.csproj",
-            "Libplanet.Action/Libplanet.Action.csproj",
-            "Libplanet.Common/Libplanet.Common.csproj",
-            "Libplanet.Crypto/Libplanet.Crypto.csproj",
-            "Libplanet.Crypto.Secp256k1/Libplanet.Crypto.Secp256k1.csproj",
-            "Libplanet.Explorer.Cocona/Libplanet.Explorer.Cocona.csproj",
-            "Libplanet.Extensions.Cocona/Libplanet.Extensions.Cocona.csproj",
-            "Libplanet.Mocks/Libplanet.Mocks.csproj",
-            "Libplanet.Net/Libplanet.Net.csproj",
-            "Libplanet.RocksDBStore/Libplanet.RocksDBStore.csproj",
-            "Libplanet.Store/Libplanet.Store.csproj",
-            "Libplanet.Store.Remote/Libplanet.Store.Remote.csproj",
-            "Libplanet.Stun/Libplanet.Stun.csproj",
-            "Libplanet.Types/Libplanet.Types.csproj"
+            "src/Libplanet/Libplanet.csproj",
+            "src/Libplanet.Action/Libplanet.Action.csproj",
+            "src/Libplanet.Common/Libplanet.Common.csproj",
+            "src/Libplanet.Crypto/Libplanet.Crypto.csproj",
+            "src/Libplanet.Crypto.Secp256k1/Libplanet.Crypto.Secp256k1.csproj",
+            "tools/Libplanet.Explorer.Cocona/Libplanet.Explorer.Cocona.csproj",
+            "tools/Libplanet.Extensions.Cocona/Libplanet.Extensions.Cocona.csproj",
+            "test/Libplanet.Mocks/Libplanet.Mocks.csproj",
+            "src/Libplanet.Net/Libplanet.Net.csproj",
+            "src/Libplanet.RocksDBStore/Libplanet.RocksDBStore.csproj",
+            "src/Libplanet.Store/Libplanet.Store.csproj",
+            "src/Libplanet.Store.Remote/Libplanet.Store.Remote.csproj",
+            "src/Libplanet.Stun/Libplanet.Stun.csproj",
+            "src/Libplanet.Types/Libplanet.Types.csproj"
           ],
           "exclude": ["**/bin/**", "**/obj/**"],
           "src": "../"
@@ -48,7 +48,7 @@
         ]
       },
       {
-        "src": "../Libplanet.Analyzers",
+        "src": "../tools/Libplanet.Analyzers",
         "dest": "analyzer",
         "files": [
           "*.md",
@@ -56,14 +56,14 @@
         ]
       },
       {
-        "src": "../Libplanet.Tools",
+        "src": "../tools/Libplanet.Tools",
         "dest": "cli",
         "files": [
           "*.md"
         ]
       },
       {
-        "src": "../Libplanet.Explorer",
+        "src": "../tools/Libplanet.Explorer",
         "dest": "explorer",
         "files": [
           "*.md"
@@ -111,7 +111,6 @@
     "fileMetadataFiles": [],
 
     "template": ["default"],
-    // "statictoc" has a bug that relative links with nested dirs in nav refer to incorrect destinations
 
     "theme": ["theme"],
     "postProcessors": [],
diff --git a/hooks/check-projects b/hooks/check-projects
index d06a06156e5..4fa193accc1 100755
--- a/hooks/check-projects
+++ b/hooks/check-projects
@@ -9,7 +9,7 @@ if ! [[ -f "$SOLUTION" ]]; then
 fi
 
 list-projects() {
-  dotnet sln "$SOLUTION" list | grep -E $'\\...proj\r?$' | sed 's/[/\].*//'
+  dotnet sln "$SOLUTION" list | grep -E $'\\...proj\r?$' | sed 's/[/][^/]*$//'
 }
 
 # shellcheck source=.github/bin/constants.sh
@@ -26,7 +26,8 @@ check-github-actions() {
 }
 
 check-contributing() {
-  if ! grep -E "^ -  \*$1\*: " CONTRIBUTING.md > /dev/null; then
+  name=$(echo "$1" | sed -re 's/(src|tools|test)\///')
+  if ! grep -E "^ -  \*$name\*: " CONTRIBUTING.md > /dev/null; then
     echo "The project $1 is not documented in the CONTRIBUTING.md file." \
       > /dev/stderr
     exit 1
diff --git a/hooks/pre-commit b/hooks/pre-commit
index 2d30c09fa38..5e459f25805 100755
--- a/hooks/pre-commit
+++ b/hooks/pre-commit
@@ -15,7 +15,7 @@ if command -v yarn --help > /dev/null; then
   # FIXME: The following workaround should be removed when Rome fixes their bug
   # which fails to resolve symlinks referring to the parent directory.
   rm -f @planetarium/cli
-  trap "ln -sf ../Libplanet.Tools @planetarium/cli" EXIT
+  trap "ln -sf ../tools/Libplanet.Tools @planetarium/cli" EXIT
   yarn rome check .
 else
   echo warn: yarn is not available\; not running commands pertaining to node.js. >&2
diff --git a/package.json b/package.json
index 1f5392e4921..6a1236314db 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,7 @@
     "@planetarium/account-aws-kms",
     "@planetarium/account-web3-secret-storage",
     "@planetarium/tx",
-    "Libplanet.Tools"
+    "tools/Libplanet.Tools"
   ],
   "scripts": {
     "build": "printf \"\\033[41;97mLibplanet note: currently, it is expected for `yarn build` to fail on the first run and succeed on the second run due to an unknown issue unrelated to the codebase (see issue #3492,) so the build phase runs twice. Whenever the culprit is specified please remove this message and the duplicate call.\\033[0m\n\" >&2 && _libplanet_build=1 yarn workspaces foreach -p -A run build || _libplanet_build=1 yarn workspaces foreach -p -A run build",
diff --git a/test/Libplanet.Tests/Tx/TxSigningMetadataTest.ts b/test/Libplanet.Tests/Tx/TxSigningMetadataTest.ts
index 84fdfeffc23..f3b18a3b09a 100644
--- a/test/Libplanet.Tests/Tx/TxSigningMetadataTest.ts
+++ b/test/Libplanet.Tests/Tx/TxSigningMetadataTest.ts
@@ -1,6 +1,3 @@
-namespace Libplanet.Tests.Tx
-{
-    public class X {
-
-    }
-}
\ No newline at end of file
+namespace Libplanet.Tests.Tx {
+    class X {}
+}
diff --git a/yarn.lock b/yarn.lock
index c6eb7cd6ac9..596388f4010 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1392,9 +1392,9 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@planetarium/cli@workspace:Libplanet.Tools":
+"@planetarium/cli@workspace:tools/Libplanet.Tools":
   version: 0.0.0-use.local
-  resolution: "@planetarium/cli@workspace:Libplanet.Tools"
+  resolution: "@planetarium/cli@workspace:tools/Libplanet.Tools"
   dependencies:
     extract-zip: "npm:^2.0.1"
     node-fetch: "npm:^3.1.1"
@@ -1532,11 +1532,11 @@ __metadata:
   linkType: hard
 
 "@types/yauzl@npm:^2.9.1":
-  version: 2.10.0
-  resolution: "@types/yauzl@npm:2.10.0"
+  version: 2.10.3
+  resolution: "@types/yauzl@npm:2.10.3"
   dependencies:
     "@types/node": "npm:*"
-  checksum: 55d27ae5d346ea260e40121675c24e112ef0247649073848e5d4e03182713ae4ec8142b98f61a1c6cbe7d3b72fa99bbadb65d8b01873e5e605cdc30f1ff70ef2
+  checksum: 5ee966ea7bd6b2802f31ad4281c92c4c0b6dfa593c378a2582c58541fa113bec3d70eb0696b34ad95e8e6861a884cba6c3e351285816693ed176222f840a8c08
   languageName: node
   linkType: hard
 
@@ -2123,7 +2123,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"debug@npm:4, debug@npm:^4.1.0, debug@npm:^4.1.1, debug@npm:^4.3.3, debug@npm:^4.3.4":
+"debug@npm:4, debug@npm:^4.1.0, debug@npm:^4.3.3, debug@npm:^4.3.4":
   version: 4.3.4
   resolution: "debug@npm:4.3.4"
   dependencies:
@@ -2135,6 +2135,18 @@ __metadata:
   languageName: node
   linkType: hard
 
+"debug@npm:^4.1.1":
+  version: 4.3.5
+  resolution: "debug@npm:4.3.5"
+  dependencies:
+    ms: "npm:2.1.2"
+  peerDependenciesMeta:
+    supports-color:
+      optional: true
+  checksum: cb6eab424c410e07813ca1392888589972ce9a32b8829c6508f5e1f25f3c3e70a76731610ae55b4bbe58d1a2fffa1424b30e97fa8d394e49cd2656a9643aedd2
+  languageName: node
+  linkType: hard
+
 "decamelize-keys@npm:^1.1.0":
   version: 1.1.1
   resolution: "decamelize-keys@npm:1.1.1"