diff --git a/.c8rc b/.c8rc
new file mode 100644
index 000000000..d0ab3915c
--- /dev/null
+++ b/.c8rc
@@ -0,0 +1,20 @@
+{
+  "all": true,
+  "src": ["client/src", "server/src"],
+  "exclude": [
+    "**/node_modules/**",
+    "**/*.test.*",
+    "client/dist",
+    "client/src/connection/rest/api",
+    "server/dist",
+    "tools",
+    "server/src/python"
+  ],
+  "reporter": ["html", "text"],
+  "excludeAfterRemap": true,
+  "checkCoverage": true,
+  "lines": 52,
+  "statements": 52,
+  "branches": 71,
+  "functions": 43
+}
diff --git a/.github/workflows/pr.yml b/.github/workflows/pr.yml
index a4c321d55..d6f48ddf7 100644
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -16,7 +16,7 @@ jobs:
       - run: npm ci
       - run: npm run format:check
       - run: npm run copyright:check
-      - run: xvfb-run -a npm run test
+      - run: xvfb-run -a npm run coverage
         if: runner.os == 'Linux'
       - run: npx @vscode/vsce package
       - uses: actions/upload-artifact@v4
diff --git a/.gitignore b/.gitignore
index 12f8d29bc..9593c185a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,4 +6,5 @@ node_modules
 *.node
 *.qps-ploc.json
 l10n/bundle.l10n.json
-.history
\ No newline at end of file
+.history
+coverage/
diff --git a/.npmrc b/.npmrc
new file mode 100644
index 000000000..0453efcd4
--- /dev/null
+++ b/.npmrc
@@ -0,0 +1 @@
+registry=https://registry.npmjs.org
\ No newline at end of file
diff --git a/.prettierignore b/.prettierignore
index d1e1c4b88..1c111ed28 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -13,3 +13,5 @@ server/**/*.json
 
 # VSCode history
 .history/
+
+coverage/
diff --git a/.vscodeignore b/.vscodeignore
index 90fbf3a15..188336f26 100644
--- a/.vscodeignore
+++ b/.vscodeignore
@@ -19,4 +19,6 @@ ContributorAgreement.txt
 .nvmrc
 eslint.config.mjs
 pull_request_template.md
-l10n/bundle.l10n.json
\ No newline at end of file
+l10n/bundle.l10n.json
+.c8rc
+coverage/
diff --git a/package-lock.json b/package-lock.json
index 70e874755..1ecd390d2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -20,6 +20,7 @@
         "@typescript-eslint/parser": "^8.32.1",
         "@vscode/l10n-dev": "^0.0.35",
         "buffer": "6.0.3",
+        "c8": "^10.1.3",
         "chai": "^4.4.1",
         "concurrently": "^9.1.2",
         "cross-env": "^10.0.0",
@@ -295,6 +296,16 @@
         "node": ">=6.9.0"
       }
     },
+    "node_modules/@bcoe/v8-coverage": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/@bcoe/v8-coverage/-/v8-coverage-1.0.2.tgz",
+      "integrity": "sha512-6zABk/ECA/QYSCQ1NGiVwwbQerUCZ+TQbp64Q3AgmfNvurHH0j8TtXa1qbShXA6qqkpAj4V5W8pP6mLe1mcMqA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/@cspotcode/source-map-support": {
       "version": "0.8.1",
       "resolved": "https://registry.npmjs.org/@cspotcode/source-map-support/-/source-map-support-0.8.1.tgz",
@@ -1082,6 +1093,16 @@
         "url": "https://github.com/chalk/wrap-ansi?sponsor=1"
       }
     },
+    "node_modules/@istanbuljs/schema": {
+      "version": "0.1.3",
+      "resolved": "https://registry.npmjs.org/@istanbuljs/schema/-/schema-0.1.3.tgz",
+      "integrity": "sha512-ZXRY4jNvVgSVQ8DL3LTcakaAtXwTVUxE81hslsyD2AtoXW/wVob10HkOJ1X/pAlcI7D+2YoZKg5do8G/w6RYgA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/@jridgewell/gen-mapping": {
       "version": "0.3.8",
       "resolved": "https://registry.npmjs.org/@jridgewell/gen-mapping/-/gen-mapping-0.3.8.tgz",
@@ -1338,6 +1359,13 @@
       "integrity": "sha512-AYnb1nQyY49te+VRAVgmzfcgjYS91mY5P0TKUDCLEM+gNnA+3T6rWITXRLYCpahpqSQbN5cE+gHpnPyXjHWxcw==",
       "dev": true
     },
+    "node_modules/@types/istanbul-lib-coverage": {
+      "version": "2.0.6",
+      "resolved": "https://registry.npmjs.org/@types/istanbul-lib-coverage/-/istanbul-lib-coverage-2.0.6.tgz",
+      "integrity": "sha512-2QF/t/auWm0lsy8XtKVPG19v3sSOQlJe/YHZgfjb/KBBHOGSV+J2q/S671rcq9uTBrLAXmZpqJiaQbMT+zNU1w==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@types/json-schema": {
       "version": "7.0.15",
       "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.15.tgz",
@@ -2268,6 +2296,40 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/c8": {
+      "version": "10.1.3",
+      "resolved": "https://registry.npmjs.org/c8/-/c8-10.1.3.tgz",
+      "integrity": "sha512-LvcyrOAaOnrrlMpW22n690PUvxiq4Uf9WMhQwNJ9vgagkL/ph1+D4uvjvDA5XCbykrc0sx+ay6pVi9YZ1GnhyA==",
+      "dev": true,
+      "license": "ISC",
+      "dependencies": {
+        "@bcoe/v8-coverage": "^1.0.1",
+        "@istanbuljs/schema": "^0.1.3",
+        "find-up": "^5.0.0",
+        "foreground-child": "^3.1.1",
+        "istanbul-lib-coverage": "^3.2.0",
+        "istanbul-lib-report": "^3.0.1",
+        "istanbul-reports": "^3.1.6",
+        "test-exclude": "^7.0.1",
+        "v8-to-istanbul": "^9.0.0",
+        "yargs": "^17.7.2",
+        "yargs-parser": "^21.1.1"
+      },
+      "bin": {
+        "c8": "bin/c8.js"
+      },
+      "engines": {
+        "node": ">=18"
+      },
+      "peerDependencies": {
+        "monocart-coverage-reports": "^2"
+      },
+      "peerDependenciesMeta": {
+        "monocart-coverage-reports": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/call-bind": {
       "version": "1.0.8",
       "resolved": "https://registry.npmjs.org/call-bind/-/call-bind-1.0.8.tgz",
@@ -2530,6 +2592,13 @@
         "url": "https://github.com/chalk/supports-color?sponsor=1"
       }
     },
+    "node_modules/convert-source-map": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/convert-source-map/-/convert-source-map-2.0.0.tgz",
+      "integrity": "sha512-Kvp459HrV2FEJ1CAsi1Ku+MY3kasH19TFykTz2xWmMeq6bk2NU3XXvfJ+Q61m0xktWwt+1HSYf3JZsTms3aRJg==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/create-require": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/create-require/-/create-require-1.1.1.tgz",
@@ -3934,6 +4003,13 @@
         "he": "bin/he"
       }
     },
+    "node_modules/html-escaper": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/html-escaper/-/html-escaper-2.0.2.tgz",
+      "integrity": "sha512-H2iMtd0I4Mt5eYiapRdIDjp+XzelXQ0tFE4JS7YFwFevXXMmOp9myNrUvCg0D6ws8iqkRPBfKHgbwig1SmlLfg==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/http-proxy-agent": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/http-proxy-agent/-/http-proxy-agent-5.0.0.tgz",
@@ -4464,6 +4540,45 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/istanbul-lib-coverage": {
+      "version": "3.2.2",
+      "resolved": "https://registry.npmjs.org/istanbul-lib-coverage/-/istanbul-lib-coverage-3.2.2.tgz",
+      "integrity": "sha512-O8dpsF+r0WV/8MNRKfnmrtCWhuKjxrq2w+jpzBL5UZKTi2LeVWnWOmWRxFlesJONmc+wLAGvKQZEOanko0LFTg==",
+      "dev": true,
+      "license": "BSD-3-Clause",
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/istanbul-lib-report": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/istanbul-lib-report/-/istanbul-lib-report-3.0.1.tgz",
+      "integrity": "sha512-GCfE1mtsHGOELCU8e/Z7YWzpmybrx/+dSTfLrvY8qRmaY6zXTKWn6WQIjaAFw069icm6GVMNkgu0NzI4iPZUNw==",
+      "dev": true,
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "istanbul-lib-coverage": "^3.0.0",
+        "make-dir": "^4.0.0",
+        "supports-color": "^7.1.0"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
+    "node_modules/istanbul-reports": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/istanbul-reports/-/istanbul-reports-3.2.0.tgz",
+      "integrity": "sha512-HGYWWS/ehqTV3xN10i23tkPkpH46MLCIMFNCaaKNavAXTF1RkqxawEPtnjnGZ6XKSInBKkiOA5BKS+aZiY3AvA==",
+      "dev": true,
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "html-escaper": "^2.0.0",
+        "istanbul-lib-report": "^3.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/iterator.prototype": {
       "version": "1.1.4",
       "resolved": "https://registry.npmjs.org/iterator.prototype/-/iterator.prototype-1.1.4.tgz",
@@ -4728,6 +4843,22 @@
         "node": ">=10"
       }
     },
+    "node_modules/make-dir": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/make-dir/-/make-dir-4.0.0.tgz",
+      "integrity": "sha512-hXdUTZYIVOt1Ex//jAQi+wTZZpUpwBj/0QsOzqegb3rGMMeJiSEu5xLHnYfBrRV4RH2+OCSOO95Is/7x1WJ4bw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "semver": "^7.5.3"
+      },
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/make-error": {
       "version": "1.3.6",
       "resolved": "https://registry.npmjs.org/make-error/-/make-error-1.3.6.tgz",
@@ -6230,6 +6361,47 @@
         }
       }
     },
+    "node_modules/test-exclude": {
+      "version": "7.0.1",
+      "resolved": "https://registry.npmjs.org/test-exclude/-/test-exclude-7.0.1.tgz",
+      "integrity": "sha512-pFYqmTw68LXVjeWJMST4+borgQP2AyMNbg1BpZh9LbyhUeNkeaPF9gzfPGUAnSMV3qPYdWUwDIjjCLiSDOl7vg==",
+      "dev": true,
+      "license": "ISC",
+      "dependencies": {
+        "@istanbuljs/schema": "^0.1.2",
+        "glob": "^10.4.1",
+        "minimatch": "^9.0.4"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/test-exclude/node_modules/brace-expansion": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-2.0.2.tgz",
+      "integrity": "sha512-Jt0vHyM+jmUBqojB7E1NIYadt0vI0Qxjxd2TErW94wDz+E2LAm5vKMXXwg6ZZBTHPuUlDgQHKXvjGBdfcF1ZDQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "balanced-match": "^1.0.0"
+      }
+    },
+    "node_modules/test-exclude/node_modules/minimatch": {
+      "version": "9.0.5",
+      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-9.0.5.tgz",
+      "integrity": "sha512-G6T0ZX48xgozx7587koeX9Ys2NYy6Gmv//P89sEte9V9whIapMNF4idKxnW2QtCcLiTWlb/wfCabAtAFWhhBow==",
+      "dev": true,
+      "license": "ISC",
+      "dependencies": {
+        "brace-expansion": "^2.0.1"
+      },
+      "engines": {
+        "node": ">=16 || 14 >=14.17"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/isaacs"
+      }
+    },
     "node_modules/to-regex-range": {
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
@@ -6629,6 +6801,21 @@
       "integrity": "sha512-wa7YjyUGfNZngI/vtK0UHAN+lgDCxBPCylVXGp0zu59Fz5aiGtNXaq3DhIov063MorB+VfufLh3JlF2KdTK3xg==",
       "dev": true
     },
+    "node_modules/v8-to-istanbul": {
+      "version": "9.3.0",
+      "resolved": "https://registry.npmjs.org/v8-to-istanbul/-/v8-to-istanbul-9.3.0.tgz",
+      "integrity": "sha512-kiGUalWN+rgBJ/1OHZsBtU4rXZOfj/7rKQxULKlIzwzQSvMJUUNgPwJEEh7gU6xEVxC0ahoOBvN2YI8GH6FNgA==",
+      "dev": true,
+      "license": "ISC",
+      "dependencies": {
+        "@jridgewell/trace-mapping": "^0.3.12",
+        "@types/istanbul-lib-coverage": "^2.0.1",
+        "convert-source-map": "^2.0.0"
+      },
+      "engines": {
+        "node": ">=10.12.0"
+      }
+    },
     "node_modules/watchpack": {
       "version": "2.4.1",
       "resolved": "https://registry.npmjs.org/watchpack/-/watchpack-2.4.1.tgz",
diff --git a/package.json b/package.json
index e2c547eec..d8b6fa709 100644
--- a/package.json
+++ b/package.json
@@ -1387,6 +1387,7 @@
     "test-client": "node ./client/out/test/runTest.js",
     "test-server": "cross-env TS_NODE_PROJECT=./server/tsconfig.json mocha -r ts-node/register ./server/test/**/*.test.ts",
     "test": "npm run test-server && npm run test-client",
+    "coverage": "c8 --clean npm run test",
     "pseudoLocalize": "npx @vscode/l10n-dev export -o ./l10n ./client/src && npx @vscode/l10n-dev generate-pseudo -o ./l10n/ ./l10n/bundle.l10n.json ./package.nls.json",
     "postinstall": "cd client && npm install && cd ../server && npm install && cd ..",
     "copyright:check": "node ./tools/check-copyright.mjs",
@@ -1403,6 +1404,7 @@
     "@typescript-eslint/parser": "^8.32.1",
     "@vscode/l10n-dev": "^0.0.35",
     "buffer": "6.0.3",
+    "c8": "^10.1.3",
     "chai": "^4.4.1",
     "concurrently": "^9.1.2",
     "cross-env": "^10.0.0",