diff --git a/.mocharc.json b/.mocharc.json
new file mode 100644
index 0000000..1df49e4
--- /dev/null
+++ b/.mocharc.json
@@ -0,0 +1,6 @@
+{
+  "extension": ["ts"],
+  "spec": "test/**/*.test.ts",
+  "require": "ts-node/register",
+  "project": "tsconfig.test.json"
+}
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index 7103b94..2ac84b6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
 	"name": "devchat",
-	"version": "0.0.45",
+	"version": "0.0.47",
 	"lockfileVersion": 2,
 	"requires": true,
 	"packages": {
 		"": {
 			"name": "devchat",
-			"version": "0.0.45",
+			"version": "0.0.47",
 			"dependencies": {
 				"@emotion/react": "^11.10.8",
 				"@mantine/core": "^6.0.10",
@@ -37,19 +37,24 @@
 				"@babel/preset-env": "^7.21.5",
 				"@babel/preset-react": "^7.18.6",
 				"@babel/preset-typescript": "^7.21.5",
+				"@types/chai": "^4.3.5",
 				"@types/glob": "^8.1.0",
-				"@types/jest": "^29.5.1",
+				"@types/mocha": "^10.0.1",
+				"@types/mock-fs": "^4.13.1",
 				"@types/ncp": "^2.0.5",
 				"@types/node": "16.x",
+				"@types/proxyquire": "^1.3.28",
 				"@types/react-dom": "^18.2.3",
 				"@types/react-syntax-highlighter": "^15.5.6",
 				"@types/shell-escape": "^0.2.1",
+				"@types/sinon": "^10.0.15",
 				"@types/uuid": "^9.0.1",
 				"@types/vscode": "^1.77.0",
 				"@typescript-eslint/eslint-plugin": "^5.56.0",
 				"@typescript-eslint/parser": "^5.56.0",
 				"@vscode/test-electron": "^2.3.0",
 				"babel-loader": "^9.1.2",
+				"chai": "^4.3.7",
 				"copy-webpack-plugin": "^11.0.0",
 				"css-loader": "^6.7.3",
 				"dotenv": "^16.0.3",
@@ -59,15 +64,21 @@
 				"html-webpack-plugin": "^5.5.1",
 				"jest": "^29.5.0",
 				"json-loader": "^0.5.7",
+				"mocha": "^10.2.0",
+				"mock-fs": "^5.2.0",
+				"proxyquire": "^2.1.3",
 				"react": "^18.2.0",
 				"react-dom": "^18.2.0",
 				"react-redux": "^8.0.5",
 				"redux": "^4.2.1",
+				"sinon": "^15.1.0",
 				"style-loader": "^3.3.2",
 				"ts-jest": "^29.1.0",
 				"ts-loader": "^9.4.2",
+				"ts-node": "^10.9.1",
 				"typescript": "^4.9.5",
 				"url-loader": "^4.1.1",
+				"vscode-test": "^1.6.1",
 				"webpack": "^5.76.3",
 				"webpack-cli": "^5.0.1",
 				"webpack-dev-server": "^4.13.3"
@@ -1964,6 +1975,28 @@
 			"integrity": "sha512-0hYQ8SB4Db5zvZB4axdMHGwEaQjkZzFjQiN9LVYvIFB2nSUHW9tYpxWriPrWDASIxiaXax83REcLxuSdnGPZtw==",
 			"dev": true
 		},
+		"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",
+			"integrity": "sha512-IchNf6dN4tHoMFIn/7OE8LWZ19Y6q/67Bmf6vnGREv8RSbBVb9LPJxEcnwrcwX6ixSvaiGoomAUvu4YSxXrVgw==",
+			"dev": true,
+			"dependencies": {
+				"@jridgewell/trace-mapping": "0.3.9"
+			},
+			"engines": {
+				"node": ">=12"
+			}
+		},
+		"node_modules/@cspotcode/source-map-support/node_modules/@jridgewell/trace-mapping": {
+			"version": "0.3.9",
+			"resolved": "https://registry.npmjs.org/@jridgewell/trace-mapping/-/trace-mapping-0.3.9.tgz",
+			"integrity": "sha512-3Belt6tdc8bPgAtbcmdtNJlirVoTmEb5e2gC94PnkwEW9jI6CAHUeoG85tjWP5WquqfavoMtMwiG4P926ZKKuQ==",
+			"dev": true,
+			"dependencies": {
+				"@jridgewell/resolve-uri": "^3.0.3",
+				"@jridgewell/sourcemap-codec": "^1.4.10"
+			}
+		},
 		"node_modules/@discoveryjs/json-ext": {
 			"version": "0.5.7",
 			"resolved": "https://registry.npmjs.org/@discoveryjs/json-ext/-/json-ext-0.5.7.tgz",
@@ -3112,6 +3145,35 @@
 			"dev": true
 		},
 		"node_modules/@sinonjs/commons": {
+			"version": "3.0.0",
+			"resolved": "https://registry.npmjs.org/@sinonjs/commons/-/commons-3.0.0.tgz",
+			"integrity": "sha512-jXBtWAF4vmdNmZgD5FoKsVLv3rPgDnLgPbU84LIJ3otV44vJlDRokVng5v8NFJdCf/da9legHcKaRuZs4L7faA==",
+			"dev": true,
+			"dependencies": {
+				"type-detect": "4.0.8"
+			}
+		},
+		"node_modules/@sinonjs/fake-timers": {
+			"version": "10.2.0",
+			"resolved": "https://registry.npmjs.org/@sinonjs/fake-timers/-/fake-timers-10.2.0.tgz",
+			"integrity": "sha512-OPwQlEdg40HAj5KNF8WW6q2KG4Z+cBCZb3m4ninfTZKaBmbIJodviQsDBoYMPHkOyJJMHnOJo5j2+LKDOhOACg==",
+			"dev": true,
+			"dependencies": {
+				"@sinonjs/commons": "^3.0.0"
+			}
+		},
+		"node_modules/@sinonjs/samsam": {
+			"version": "8.0.0",
+			"resolved": "https://registry.npmjs.org/@sinonjs/samsam/-/samsam-8.0.0.tgz",
+			"integrity": "sha512-Bp8KUVlLp8ibJZrnvq2foVhP0IVX2CIprMJPK0vqGqgrDa0OHVKeZyBykqskkrdxV6yKBPmGasO8LVjAKR3Gew==",
+			"dev": true,
+			"dependencies": {
+				"@sinonjs/commons": "^2.0.0",
+				"lodash.get": "^4.4.2",
+				"type-detect": "^4.0.8"
+			}
+		},
+		"node_modules/@sinonjs/samsam/node_modules/@sinonjs/commons": {
 			"version": "2.0.0",
 			"resolved": "https://registry.npmjs.org/@sinonjs/commons/-/commons-2.0.0.tgz",
 			"integrity": "sha512-uLa0j859mMrg2slwQYdO/AkrOfmH+X6LTVmNTS9CqexuE2IvVORIkSpJLqePAbEnKJ77aMmCwr1NUZ57120Xcg==",
@@ -3120,14 +3182,11 @@
 				"type-detect": "4.0.8"
 			}
 		},
-		"node_modules/@sinonjs/fake-timers": {
-			"version": "10.0.2",
-			"resolved": "https://registry.npmjs.org/@sinonjs/fake-timers/-/fake-timers-10.0.2.tgz",
-			"integrity": "sha512-SwUDyjWnah1AaNl7kxsa7cfLhlTYoiyhDAIgyh+El30YvXs/o7OLXpYH88Zdhyx9JExKrmHDJ+10bwIcY80Jmw==",
-			"dev": true,
-			"dependencies": {
-				"@sinonjs/commons": "^2.0.0"
-			}
+		"node_modules/@sinonjs/text-encoding": {
+			"version": "0.7.2",
+			"resolved": "https://registry.npmjs.org/@sinonjs/text-encoding/-/text-encoding-0.7.2.tgz",
+			"integrity": "sha512-sXXKG+uL9IrKqViTtao2Ws6dy0znu9sOaP1di/jKGW1M6VssO8vlpXCQcpZ+jisQ1tTFAC5Jo/EOzFbggBagFQ==",
+			"dev": true
 		},
 		"node_modules/@tabler/icons": {
 			"version": "2.17.0",
@@ -3525,6 +3584,30 @@
 				"node": ">= 6"
 			}
 		},
+		"node_modules/@tsconfig/node10": {
+			"version": "1.0.9",
+			"resolved": "https://registry.npmjs.org/@tsconfig/node10/-/node10-1.0.9.tgz",
+			"integrity": "sha512-jNsYVVxU8v5g43Erja32laIDHXeoNvFEpX33OK4d6hljo3jDhCBDhx5dhCCTMWUojscpAagGiRkBKxpdl9fxqA==",
+			"dev": true
+		},
+		"node_modules/@tsconfig/node12": {
+			"version": "1.0.11",
+			"resolved": "https://registry.npmjs.org/@tsconfig/node12/-/node12-1.0.11.tgz",
+			"integrity": "sha512-cqefuRsh12pWyGsIoBKJA9luFu3mRxCA+ORZvA4ktLSzIuCUtWVxGIuXigEwO5/ywWFMZ2QEGKWvkZG1zDMTag==",
+			"dev": true
+		},
+		"node_modules/@tsconfig/node14": {
+			"version": "1.0.3",
+			"resolved": "https://registry.npmjs.org/@tsconfig/node14/-/node14-1.0.3.tgz",
+			"integrity": "sha512-ysT8mhdixWK6Hw3i1V2AeRqZ5WfXg1G43mqoYlM2nc6388Fq5jcXyr5mRsqViLx/GJYdoL0bfXD8nmF+Zn/Iow==",
+			"dev": true
+		},
+		"node_modules/@tsconfig/node16": {
+			"version": "1.0.4",
+			"resolved": "https://registry.npmjs.org/@tsconfig/node16/-/node16-1.0.4.tgz",
+			"integrity": "sha512-vxhUy4J8lyeyinH7Azl1pdd43GJhZH/tP2weN8TntQblOY+A0XbT8DJk1/oCPuOOyg/Ja757rG0CgHcWC8OfMA==",
+			"dev": true
+		},
 		"node_modules/@types/babel__core": {
 			"version": "7.20.0",
 			"resolved": "https://registry.npmjs.org/@types/babel__core/-/babel__core-7.20.0.tgz",
@@ -3585,6 +3668,12 @@
 				"@types/node": "*"
 			}
 		},
+		"node_modules/@types/chai": {
+			"version": "4.3.5",
+			"resolved": "https://registry.npmjs.org/@types/chai/-/chai-4.3.5.tgz",
+			"integrity": "sha512-mEo1sAde+UCE6b2hxn332f1g1E8WfYRu6p5SvTKr2ZKC1f7gFJXk4h5PyGP9Dt6gCaG8y8XhwnXWC6Iy2cmBng==",
+			"dev": true
+		},
 		"node_modules/@types/connect": {
 			"version": "3.4.35",
 			"resolved": "https://registry.npmjs.org/@types/connect/-/connect-3.4.35.tgz",
@@ -3738,16 +3827,6 @@
 				"@types/istanbul-lib-report": "*"
 			}
 		},
-		"node_modules/@types/jest": {
-			"version": "29.5.1",
-			"resolved": "https://registry.npmjs.org/@types/jest/-/jest-29.5.1.tgz",
-			"integrity": "sha512-tEuVcHrpaixS36w7hpsfLBLpjtMRJUE09/MHXn923LOVojDwyC14cWcfc0rDs0VEfUyYmt/+iX1kxxp+gZMcaQ==",
-			"dev": true,
-			"dependencies": {
-				"expect": "^29.0.0",
-				"pretty-format": "^29.0.0"
-			}
-		},
 		"node_modules/@types/json-schema": {
 			"version": "7.0.11",
 			"resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.11.tgz",
@@ -3774,6 +3853,21 @@
 			"integrity": "sha512-K0VQKziLUWkVKiRVrx4a40iPaxTUefQmjtkQofBkYRcoaaL/8rhwDWww9qWbrgicNOgnpIsMxyNIUM4+n6dUIA==",
 			"dev": true
 		},
+		"node_modules/@types/mocha": {
+			"version": "10.0.1",
+			"resolved": "https://registry.npmjs.org/@types/mocha/-/mocha-10.0.1.tgz",
+			"integrity": "sha512-/fvYntiO1GeICvqbQ3doGDIP97vWmvFt83GKguJ6prmQM2iXZfFcq6YE8KteFyRtX2/h5Hf91BYvPodJKFYv5Q==",
+			"dev": true
+		},
+		"node_modules/@types/mock-fs": {
+			"version": "4.13.1",
+			"resolved": "https://registry.npmjs.org/@types/mock-fs/-/mock-fs-4.13.1.tgz",
+			"integrity": "sha512-m6nFAJ3lBSnqbvDZioawRvpLXSaPyn52Srf7OfzjubYbYX8MTUdIgDxQl0wEapm4m/pNYSd9TXocpQ0TvZFlYA==",
+			"dev": true,
+			"dependencies": {
+				"@types/node": "*"
+			}
+		},
 		"node_modules/@types/ms": {
 			"version": "0.7.31",
 			"resolved": "https://registry.npmjs.org/@types/ms/-/ms-0.7.31.tgz",
@@ -3820,6 +3914,12 @@
 			"resolved": "https://registry.npmjs.org/@types/prop-types/-/prop-types-15.7.5.tgz",
 			"integrity": "sha512-JCB8C6SnDoQf0cNycqd/35A7MjcnK+ZTqE7judS6o7utxUCg6imJg3QK2qzHKszlTjcj2cn+NwMB2i96ubpj7w=="
 		},
+		"node_modules/@types/proxyquire": {
+			"version": "1.3.28",
+			"resolved": "https://registry.npmjs.org/@types/proxyquire/-/proxyquire-1.3.28.tgz",
+			"integrity": "sha512-SQaNzWQ2YZSr7FqAyPPiA3FYpux2Lqh3HWMZQk47x3xbMCqgC/w0dY3dw9rGqlweDDkrySQBcaScXWeR+Yb11Q==",
+			"dev": true
+		},
 		"node_modules/@types/qs": {
 			"version": "6.9.7",
 			"resolved": "https://registry.npmjs.org/@types/qs/-/qs-6.9.7.tgz",
@@ -3912,6 +4012,21 @@
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 			"dev": true
 		},
+		"node_modules/@types/sinon": {
+			"version": "10.0.15",
+			"resolved": "https://registry.npmjs.org/@types/sinon/-/sinon-10.0.15.tgz",
+			"integrity": "sha512-3lrFNQG0Kr2LDzvjyjB6AMJk4ge+8iYhQfdnSwIwlG88FUOV43kPcQqDZkDa/h3WSZy6i8Fr0BSjfQtB1B3xuQ==",
+			"dev": true,
+			"dependencies": {
+				"@types/sinonjs__fake-timers": "*"
+			}
+		},
+		"node_modules/@types/sinonjs__fake-timers": {
+			"version": "8.1.2",
+			"resolved": "https://registry.npmjs.org/@types/sinonjs__fake-timers/-/sinonjs__fake-timers-8.1.2.tgz",
+			"integrity": "sha512-9GcLXF0/v3t80caGs5p2rRfkB+a8VBGLJZVih6CNFkx8IZ994wiKKLSRs9nuFwk1HevWs/1mnUmkApGrSGsShA==",
+			"dev": true
+		},
 		"node_modules/@types/sockjs": {
 			"version": "0.3.33",
 			"resolved": "https://registry.npmjs.org/@types/sockjs/-/sockjs-0.3.33.tgz",
@@ -4427,6 +4542,15 @@
 				"acorn": "^6.0.0 || ^7.0.0 || ^8.0.0"
 			}
 		},
+		"node_modules/acorn-walk": {
+			"version": "8.2.0",
+			"resolved": "https://registry.npmjs.org/acorn-walk/-/acorn-walk-8.2.0.tgz",
+			"integrity": "sha512-k+iyHEuPgSw6SbuDpGQM+06HQUa04DZ3o+F6CSzXMvvI5KMvnaEqXe+YVe555R9nn6GPt404fos4wcgpw12SDA==",
+			"dev": true,
+			"engines": {
+				"node": ">=0.4.0"
+			}
+		},
 		"node_modules/agent-base": {
 			"version": "6.0.2",
 			"resolved": "https://registry.npmjs.org/agent-base/-/agent-base-6.0.2.tgz",
@@ -4503,6 +4627,15 @@
 				"ajv": "^6.9.1"
 			}
 		},
+		"node_modules/ansi-colors": {
+			"version": "4.1.1",
+			"resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-4.1.1.tgz",
+			"integrity": "sha512-JoX0apGbHaUJBNl6yF+p6JAFYZ666/hhCGKN5t9QFjbJQKUU/g8MNbFDbvfrgKXvI1QpZplPOnwIo99lX/AAmA==",
+			"dev": true,
+			"engines": {
+				"node": ">=6"
+			}
+		},
 		"node_modules/ansi-escapes": {
 			"version": "4.3.2",
 			"resolved": "https://registry.npmjs.org/ansi-escapes/-/ansi-escapes-4.3.2.tgz",
@@ -4579,6 +4712,12 @@
 				"node": ">= 8"
 			}
 		},
+		"node_modules/arg": {
+			"version": "4.1.3",
+			"resolved": "https://registry.npmjs.org/arg/-/arg-4.1.3.tgz",
+			"integrity": "sha512-58S9QDqG0Xx27YwPSt9fJxivjYl432YCwfDMfZ+71RAqUrZef7LrKQZ3LHLOwCS4FLNBplP533Zx895SeOCHvA==",
+			"dev": true
+		},
 		"node_modules/argparse": {
 			"version": "2.0.1",
 			"resolved": "https://registry.npmjs.org/argparse/-/argparse-2.0.1.tgz",
@@ -4615,6 +4754,15 @@
 				"node": ">=8"
 			}
 		},
+		"node_modules/assertion-error": {
+			"version": "1.1.0",
+			"resolved": "https://registry.npmjs.org/assertion-error/-/assertion-error-1.1.0.tgz",
+			"integrity": "sha512-jgsaNduz+ndvGyFt3uSuWqvy4lCnIJiovtouQN5JZHOKCS2QuhEdbcQHFhVksz2N2U9hXJo8odG7ETyWlEeuDw==",
+			"dev": true,
+			"engines": {
+				"node": "*"
+			}
+		},
 		"node_modules/asynckit": {
 			"version": "0.4.0",
 			"resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
@@ -4893,6 +5041,15 @@
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 			"dev": true
 		},
+		"node_modules/big-integer": {
+			"version": "1.6.51",
+			"resolved": "https://registry.npmjs.org/big-integer/-/big-integer-1.6.51.tgz",
+			"integrity": "sha512-GPEid2Y9QU1Exl1rpO9B2IPJGHPSupF5GnVIP0blYvNOMer2bTvSWs1jGOUg04hTmu67nmLsQ9TBo1puaotBHg==",
+			"dev": true,
+			"engines": {
+				"node": ">=0.6"
+			}
+		},
 		"node_modules/big.js": {
 			"version": "5.2.2",
 			"resolved": "https://registry.npmjs.org/big.js/-/big.js-5.2.2.tgz",
@@ -4902,6 +5059,19 @@
 				"node": "*"
 			}
 		},
+		"node_modules/binary": {
+			"version": "0.3.0",
+			"resolved": "https://registry.npmjs.org/binary/-/binary-0.3.0.tgz",
+			"integrity": "sha512-D4H1y5KYwpJgK8wk1Cue5LLPgmwHKYSChkbspQg5JtVuR5ulGckxfR62H3AE9UDkdMC8yyXlqYihuz3Aqg2XZg==",
+			"dev": true,
+			"dependencies": {
+				"buffers": "~0.1.1",
+				"chainsaw": "~0.1.0"
+			},
+			"engines": {
+				"node": "*"
+			}
+		},
 		"node_modules/binary-extensions": {
 			"version": "2.2.0",
 			"resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-2.2.0.tgz",
@@ -4911,6 +5081,12 @@
 				"node": ">=8"
 			}
 		},
+		"node_modules/bluebird": {
+			"version": "3.4.7",
+			"resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.4.7.tgz",
+			"integrity": "sha512-iD3898SR7sWVRHbiQv+sHUtHnMvC1o3nW5rAcqnq3uOn07DSAppZYUkIGslDz6gXC7HfunPe7YVBgoEJASPcHA==",
+			"dev": true
+		},
 		"node_modules/body-parser": {
 			"version": "1.20.1",
 			"resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.1.tgz",
@@ -4999,6 +5175,12 @@
 				"node": ">=8"
 			}
 		},
+		"node_modules/browser-stdout": {
+			"version": "1.3.1",
+			"resolved": "https://registry.npmjs.org/browser-stdout/-/browser-stdout-1.3.1.tgz",
+			"integrity": "sha512-qhAVI1+Av2X7qelOfAIYwXONood6XlZE/fXaBSmW/T5SzLAmCgzi+eiWE7fUvbHaeNBQH13UftjpXxsfLkMpgw==",
+			"dev": true
+		},
 		"node_modules/browserslist": {
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@@ -12164,6 +12859,58 @@
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@@ -12298,6 +13045,24 @@
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@@ -12514,6 +13279,12 @@
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+			"deprecated": "This package has been renamed to @vscode/test-electron, please update to the new name",
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+				"@sinonjs/fake-timers": "^10.0.2",
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+					"requires": {
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+					"dev": true
+				},
+				"path-to-regexp": {
+					"version": "1.8.0",
+					"resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-1.8.0.tgz",
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 		},
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+		},
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 		},
+		"proxyquire": {
+			"version": "2.1.3",
+			"resolved": "https://registry.npmjs.org/proxyquire/-/proxyquire-2.1.3.tgz",
+			"integrity": "sha512-BQWfCqYM+QINd+yawJz23tbBM40VIGXOdDw3X344KcclI/gtBbdWF6SlQ4nK/bYhF9d27KYug9WzljHC6B9Ysg==",
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+			"requires": {
+				"fill-keys": "^1.0.2",
+				"module-not-found-error": "^1.0.1",
+				"resolve": "^1.11.1"
+			}
+		},
 		"punycode": {
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 			"resolved": "https://registry.npmjs.org/punycode/-/punycode-2.3.0.tgz",
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 			"dev": true
 		},
+		"sinon": {
+			"version": "15.1.0",
+			"resolved": "https://registry.npmjs.org/sinon/-/sinon-15.1.0.tgz",
+			"integrity": "sha512-cS5FgpDdE9/zx7no8bxROHymSlPLZzq0ChbbLk1DrxBfc+eTeBK3y8nIL+nu/0QeYydhhbLIr7ecHJpywjQaoQ==",
+			"dev": true,
+			"requires": {
+				"@sinonjs/commons": "^3.0.0",
+				"@sinonjs/fake-timers": "^10.2.0",
+				"@sinonjs/samsam": "^8.0.0",
+				"diff": "^5.1.0",
+				"nise": "^5.1.4",
+				"supports-color": "^7.2.0"
+			}
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 			"dev": true
 		},
+		"traverse": {
+			"version": "0.3.9",
+			"resolved": "https://registry.npmjs.org/traverse/-/traverse-0.3.9.tgz",
+			"integrity": "sha512-iawgk0hLP3SxGKDfnDJf8wTz4p2qImnyihM5Hh/sGvQ3K37dPi/w8sRhdNIxYA1TwFwc5mDhIJq+O0RsvXBKdQ==",
+			"dev": true
+		},
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@@ -21957,6 +23361,35 @@
 				"semver": "^7.3.4"
 			}
 		},
+		"ts-node": {
+			"version": "10.9.1",
+			"resolved": "https://registry.npmjs.org/ts-node/-/ts-node-10.9.1.tgz",
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+			"dev": true,
+			"requires": {
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+				"@tsconfig/node10": "^1.0.7",
+				"@tsconfig/node12": "^1.0.7",
+				"@tsconfig/node14": "^1.0.0",
+				"@tsconfig/node16": "^1.0.2",
+				"acorn": "^8.4.1",
+				"acorn-walk": "^8.1.1",
+				"arg": "^4.1.0",
+				"create-require": "^1.1.0",
+				"diff": "^4.0.1",
+				"make-error": "^1.1.1",
+				"v8-compile-cache-lib": "^3.0.1",
+				"yn": "3.1.1"
+			},
+			"dependencies": {
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+					"version": "4.0.2",
+					"resolved": "https://registry.npmjs.org/diff/-/diff-4.0.2.tgz",
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+				}
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 			"dev": true
 		},
+		"unzipper": {
+			"version": "0.10.14",
+			"resolved": "https://registry.npmjs.org/unzipper/-/unzipper-0.10.14.tgz",
+			"integrity": "sha512-ti4wZj+0bQTiX2KmKWuwj7lhV+2n//uXEotUmGuQqrbVZSEGFMbI68+c6JCQ8aAmUWYvtHEz2A8K6wXvueR/6g==",
+			"dev": true,
+			"requires": {
+				"big-integer": "^1.6.17",
+				"binary": "~0.3.0",
+				"bluebird": "~3.4.1",
+				"buffer-indexof-polyfill": "~1.0.0",
+				"duplexer2": "~0.1.4",
+				"fstream": "^1.0.12",
+				"graceful-fs": "^4.2.2",
+				"listenercount": "~1.0.1",
+				"readable-stream": "~2.3.6",
+				"setimmediate": "~1.0.4"
+			}
+		},
 		"update-browserslist-db": {
 			"version": "1.0.11",
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@@ -22176,6 +23627,12 @@
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 			}
 		},
+		"v8-compile-cache-lib": {
+			"version": "3.0.1",
+			"resolved": "https://registry.npmjs.org/v8-compile-cache-lib/-/v8-compile-cache-lib-3.0.1.tgz",
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+			"dev": true
+		},
 		"v8-to-istanbul": {
 			"version": "9.1.0",
 			"resolved": "https://registry.npmjs.org/v8-to-istanbul/-/v8-to-istanbul-9.1.0.tgz",
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 			"dev": true
 		},
+		"vscode-test": {
+			"version": "1.6.1",
+			"resolved": "https://registry.npmjs.org/vscode-test/-/vscode-test-1.6.1.tgz",
+			"integrity": "sha512-086q88T2ca1k95mUzffvbzb7esqQNvJgiwY4h29ukPhFo8u+vXOOmelUoU5EQUHs3Of8+JuQ3oGdbVCqaxuTXA==",
+			"dev": true,
+			"requires": {
+				"http-proxy-agent": "^4.0.1",
+				"https-proxy-agent": "^5.0.0",
+				"rimraf": "^3.0.2",
+				"unzipper": "^0.10.11"
+			}
+		},
 		"w3c-keyname": {
 			"version": "2.2.6",
 			"resolved": "https://registry.npmjs.org/w3c-keyname/-/w3c-keyname-2.2.6.tgz",
@@ -22487,6 +23956,12 @@
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 			"dev": true
 		},
+		"workerpool": {
+			"version": "6.2.1",
+			"resolved": "https://registry.npmjs.org/workerpool/-/workerpool-6.2.1.tgz",
+			"integrity": "sha512-ILEIE97kDZvF9Wb9f6h5aXK4swSlKGUcOEGiIYb2OOu/IrDU9iwj0fD//SsA6E5ibwJxpEvhullJY4Sl4GcpAw==",
+			"dev": true
+		},
 		"wrap-ansi": {
 			"version": "7.0.0",
 			"resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-7.0.0.tgz",
@@ -22543,6 +24018,45 @@
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 		},
+		"yargs": {
+			"version": "16.2.0",
+			"resolved": "https://registry.npmjs.org/yargs/-/yargs-16.2.0.tgz",
+			"integrity": "sha512-D1mvvtDG0L5ft/jGWkLpG1+m0eQxOfaBvTNELraWj22wSVUMWxZUvYgJYcKh6jGGIkJFhH4IZPQhR4TKpc8mBw==",
+			"dev": true,
+			"requires": {
+				"cliui": "^7.0.2",
+				"escalade": "^3.1.1",
+				"get-caller-file": "^2.0.5",
+				"require-directory": "^2.1.1",
+				"string-width": "^4.2.0",
+				"y18n": "^5.0.5",
+				"yargs-parser": "^20.2.2"
+			}
+		},
+		"yargs-parser": {
+			"version": "20.2.4",
+			"resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-20.2.4.tgz",
+			"integrity": "sha512-WOkpgNhPTlE73h4VFAFsOnomJVaovO8VqLDzy5saChRBFQFBoMYirowyW+Q9HB4HFF4Z7VZTiG3iSzJJA29yRA==",
+			"dev": true
+		},
+		"yargs-unparser": {
+			"version": "2.0.0",
+			"resolved": "https://registry.npmjs.org/yargs-unparser/-/yargs-unparser-2.0.0.tgz",
+			"integrity": "sha512-7pRTIA9Qc1caZ0bZ6RYRGbHJthJWuakf+WmHK0rVeLkNrrGhfoabBNdue6kdINI6r4if7ocq9aD/n7xwKOdzOA==",
+			"dev": true,
+			"requires": {
+				"camelcase": "^6.0.0",
+				"decamelize": "^4.0.0",
+				"flat": "^5.0.2",
+				"is-plain-obj": "^2.1.0"
+			}
+		},
+		"yn": {
+			"version": "3.1.1",
+			"resolved": "https://registry.npmjs.org/yn/-/yn-3.1.1.tgz",
+			"integrity": "sha512-Ux4ygGWsu2c7isFWe8Yu1YluJmqVhxqK2cLXNQA5AcC3QfbGNpM7fu0Y8b/z16pXLnFxZYvWhd3fhBY9DLmC6Q==",
+			"dev": true
+		},
 		"yocto-queue": {
 			"version": "0.1.0",
 			"resolved": "https://registry.npmjs.org/yocto-queue/-/yocto-queue-0.1.0.tgz",
diff --git a/package.json b/package.json
index 0cfd3b6..22b92d6 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
 	"name": "devchat",
 	"displayName": "DevChat",
 	"description": "Write prompts, not code",
-	"version": "0.0.45",
+	"version": "0.0.47",
 	"icon": "assets/devchat.png",
 	"publisher": "merico",
 	"engines": {
@@ -155,7 +155,7 @@
 			},
 			{
 				"command": "DevChat.OPENAI_API_KEY",
-				"title": "DEVCHAT_API_KEY",
+				"title": "Input Access Key",
 				"category": "DevChat"
 			},
 			{
@@ -314,7 +314,7 @@
 		"watch-tests": "tsc -p . -w --outDir out",
 		"pretest": "npm run compile-tests && npm run compile && npm run lint",
 		"lint": "eslint src --ext ts",
-		"test": "node ./out/test/runTest.js",
+		"test": "mocha",
 		"build": "webpack --config webpack.config.js",
 		"dev": "webpack serve --config webpack.config.js --open"
 	},
@@ -323,19 +323,24 @@
 		"@babel/preset-env": "^7.21.5",
 		"@babel/preset-react": "^7.18.6",
 		"@babel/preset-typescript": "^7.21.5",
+		"@types/chai": "^4.3.5",
 		"@types/glob": "^8.1.0",
-		"@types/jest": "^29.5.1",
+		"@types/mocha": "^10.0.1",
+		"@types/mock-fs": "^4.13.1",
 		"@types/ncp": "^2.0.5",
 		"@types/node": "16.x",
+		"@types/proxyquire": "^1.3.28",
 		"@types/react-dom": "^18.2.3",
 		"@types/react-syntax-highlighter": "^15.5.6",
 		"@types/shell-escape": "^0.2.1",
+		"@types/sinon": "^10.0.15",
 		"@types/uuid": "^9.0.1",
 		"@types/vscode": "^1.77.0",
 		"@typescript-eslint/eslint-plugin": "^5.56.0",
 		"@typescript-eslint/parser": "^5.56.0",
 		"@vscode/test-electron": "^2.3.0",
 		"babel-loader": "^9.1.2",
+		"chai": "^4.3.7",
 		"copy-webpack-plugin": "^11.0.0",
 		"css-loader": "^6.7.3",
 		"dotenv": "^16.0.3",
@@ -345,15 +350,21 @@
 		"html-webpack-plugin": "^5.5.1",
 		"jest": "^29.5.0",
 		"json-loader": "^0.5.7",
+		"mocha": "^10.2.0",
+		"mock-fs": "^5.2.0",
+		"proxyquire": "^2.1.3",
 		"react": "^18.2.0",
 		"react-dom": "^18.2.0",
 		"react-redux": "^8.0.5",
 		"redux": "^4.2.1",
+		"sinon": "^15.1.0",
 		"style-loader": "^3.3.2",
 		"ts-jest": "^29.1.0",
 		"ts-loader": "^9.4.2",
+		"ts-node": "^10.9.1",
 		"typescript": "^4.9.5",
 		"url-loader": "^4.1.1",
+		"vscode-test": "^1.6.1",
 		"webpack": "^5.76.3",
 		"webpack-cli": "^5.0.1",
 		"webpack-dev-server": "^4.13.3"
diff --git a/src/command/commandManager.ts b/src/command/commandManager.ts
index c3cae0e..b0600d0 100644
--- a/src/command/commandManager.ts
+++ b/src/command/commandManager.ts
@@ -1,8 +1,4 @@
-import { vs } from "react-syntax-highlighter/dist/esm/styles/hljs";
 import CustomCommands from "./customCommand";
-import { logger } from "../util/logger";
-import * as vscode from 'vscode';
-import * as path from 'path';
 
 export interface Command {
     name: string;
diff --git a/src/command/customCommand.ts b/src/command/customCommand.ts
index eeec6c3..381005c 100644
--- a/src/command/customCommand.ts
+++ b/src/command/customCommand.ts
@@ -2,88 +2,92 @@ import fs from 'fs';
 import path from 'path';
 import { logger } from '../util/logger';
 
-interface Command {
-  name: string;
-  pattern: string;
-  description: string;
-  message: string;
-  default: boolean;
-  show: boolean;
-  instructions: string[];
+export interface Command {
+	name: string;
+	pattern: string;
+	description: string;
+	message: string;
+	default: boolean;
+	show: boolean;
+	instructions: string[];
 }
 
 class CustomCommands {
 	private static instance: CustomCommands | null = null;
 	private commands: Command[] = [];
 
-  private constructor() {
-  }
+	private constructor() {
+	}
 
-  public static getInstance(): CustomCommands {
-    if (!CustomCommands.instance) {
-      CustomCommands.instance = new CustomCommands();
-    }
-    return CustomCommands.instance;
-  }
-
-  public parseCommands(workflowsDir: string): void {
-	this.commands = [];
-
-	try {
-		const subDirs = fs.readdirSync(workflowsDir, { withFileTypes: true })
-		.filter(dirent => dirent.isDirectory())
-		.map(dirent => dirent.name);
-
-		for (const dir of subDirs) {
-		const settingsPath = path.join(workflowsDir, dir, '_setting_.json');
-		if (fs.existsSync(settingsPath)) {
-			const settings = JSON.parse(fs.readFileSync(settingsPath, 'utf-8'));
-			const command: Command = {
-			name: dir,
-			pattern: settings.pattern,
-			description: settings.description,
-			message: settings.message,
-			default: settings.default,
-			show: settings.show === undefined ? "true": settings.show,
-			instructions: settings.instructions
-			};
-			this.commands.push(command);
+	public static getInstance(): CustomCommands {
+		if (!CustomCommands.instance) {
+			CustomCommands.instance = new CustomCommands();
 		}
+		return CustomCommands.instance;
+	}
+
+	public parseCommands(workflowsDir: string): void {
+		this.commands = [];
+
+		try {
+			const subDirs = fs.readdirSync(workflowsDir, { withFileTypes: true })
+				.filter(dirent => dirent.isDirectory())
+				.map(dirent => dirent.name);
+
+			for (const dir of subDirs) {
+				const settingsPath = path.join(workflowsDir, dir, '_setting_.json');
+				if (fs.existsSync(settingsPath)) {
+					const settings = JSON.parse(fs.readFileSync(settingsPath, 'utf-8'));
+					const command: Command = {
+						name: dir,
+						pattern: settings.pattern,
+						description: settings.description,
+						message: settings.message,
+						default: settings.default,
+						show: settings.show === undefined ? "true" : settings.show,
+						instructions: settings.instructions
+					};
+					this.commands.push(command);
+				}
+			}
+		} catch (error) {
+			// 显示错误消息
+			logger.channel()?.error(`Failed to parse commands: ${error}`);
+			logger.channel()?.show();
 		}
-	} catch (error) {
-		// 显示错误消息
-		logger.channel()?.error(`Failed to parse commands: ${error}`);
-		logger.channel()?.show();
-	}	
-}
+	}
 
-  public getCommands(): Command[] {
-    return this.commands;
-  }
+	public regCommand(command: Command) {
+		this.commands.push(command);
+	}
 
-  public getCommand(commandName: string): Command | null {
-	const foundCommand = this.commands.find(command => command.name === commandName);
-	return foundCommand ? foundCommand : null;
+	public getCommands(): Command[] {
+		return this.commands;
+	}
+
+	public getCommand(commandName: string): Command | null {
+		const foundCommand = this.commands.find(command => command.name === commandName);
+		return foundCommand ? foundCommand : null;
 	}
 
 
-  public handleCommand(commandName: string): string {
-    // 获取命令对象，这里假设您已经有一个方法或属性可以获取到命令对象
-    const command = this.getCommand(commandName);
-	if (!command) {
-		logger.channel()?.error(`Command ${commandName} not found!`);
-		logger.channel()?.show();
-		return '';
+	public handleCommand(commandName: string): string {
+		// 获取命令对象，这里假设您已经有一个方法或属性可以获取到命令对象
+		const command = this.getCommand(commandName);
+		if (!command) {
+			logger.channel()?.error(`Command ${commandName} not found!`);
+			logger.channel()?.show();
+			return '';
+		}
+
+		// 构建instructions列表字符串
+		const instructions = command!.instructions
+			.map((instruction: string) => `[instruction|./.chat/workflows/${command.name}/${instruction}]`)
+			.join(' ');
+
+		// 返回结果字符串
+		return `${instructions}  ${command!.message}`;
 	}
-
-    // 构建instructions列表字符串
-    const instructions = command!.instructions
-      .map((instruction: string) => `[instruction|./.chat/workflows/${command.name}/${instruction}]`)
-      .join(' ');
-
-    // 返回结果字符串
-    return `${instructions}  ${command!.message}`;
-  }
 }
 
 export default CustomCommands;
diff --git a/src/context/contextCodeSelected.ts b/src/context/contextCodeSelected.ts
index abf920b..569aa40 100644
--- a/src/context/contextCodeSelected.ts
+++ b/src/context/contextCodeSelected.ts
@@ -1,7 +1,7 @@
 
-import * as vscode from 'vscode';
 import * as path from 'path';
 import { createTempSubdirectory, getLanguageIdByFileName } from '../util/commonUtil';
+import { UiUtilWrapper } from '../util/uiUtil';
 
 export async function handleCodeSelected(fileSelected: string, codeSelected: string) {
     // get file name from fileSelected
@@ -15,7 +15,7 @@ export async function handleCodeSelected(fileSelected: string, codeSelected: str
     const languageId = await getLanguageIdByFileName(fileSelected);
 
 	// get relative path of workspace
-	const workspaceDir = vscode.workspace.workspaceFolders?.[0].uri.fsPath;
+	const workspaceDir = UiUtilWrapper.workspaceFoldersFirstPath();
 	const relativePath = path.relative(workspaceDir!, fileSelected);
 
     // convert fileContent to markdown code block with languageId and file path
@@ -27,7 +27,7 @@ export async function handleCodeSelected(fileSelected: string, codeSelected: str
 	const jsonData = JSON.stringify(data);
 
     // save markdownCodeBlock to temp file
-    await vscode.workspace.fs.writeFile(vscode.Uri.file(tempFile), Buffer.from(jsonData));
+    await UiUtilWrapper.writeFile(tempFile, jsonData);
 
     return `[context|${tempFile}]`;
 }
\ No newline at end of file
diff --git a/src/context/contextCustomCommand.ts b/src/context/contextCustomCommand.ts
index 54fa938..0f8d502 100644
--- a/src/context/contextCustomCommand.ts
+++ b/src/context/contextCustomCommand.ts
@@ -1,15 +1,16 @@
 import * as path from 'path';
-import * as vscode from 'vscode';
 import { ChatContext } from './contextManager';
 import { createTempSubdirectory, runCommandStringAndWriteOutput } from '../util/commonUtil';
 import { logger } from '../util/logger';
+import { UiUtilWrapper } from '../util/uiUtil';
+
 
 export const customCommandContext: ChatContext = {
     name: '<custom command>',
     description: 'custorm command',
     handler: async () => {
         // popup a dialog to ask for the command line to run
-        const customCommand = await vscode.window.showInputBox({
+        const customCommand = await UiUtilWrapper.showInputBox({
             prompt: 'Input your custom command',
             placeHolder: 'for example: ls -l'
         });
@@ -17,15 +18,15 @@ export const customCommandContext: ChatContext = {
         // 检查用户是否输入了命令
         if (customCommand) {
             const tempDir = await createTempSubdirectory('devchat/context');
-            const diff_file = path.join(tempDir, 'custom.txt');
+            const diffFile = path.join(tempDir, 'custom.txt');
 
 			logger.channel()?.info(`custom command: ${customCommand}`);
-            const result = await runCommandStringAndWriteOutput(customCommand, diff_file);
+            const result = await runCommandStringAndWriteOutput(customCommand, diffFile);
 			logger.channel()?.info(`custom command: ${customCommand} exit code:`, result.exitCode);
 
 			logger.channel()?.debug(`custom command: ${customCommand} stdout:`, result.stdout);
 			logger.channel()?.debug(`custom command: ${customCommand} stderr:`, result.stderr);
-            return `[context|${diff_file}]`;
+            return `[context|${diffFile}]`;
         }
         return '';
   },
diff --git a/src/context/contextFileSelected.ts b/src/context/contextFileSelected.ts
index 845bb6c..94c1a8f 100644
--- a/src/context/contextFileSelected.ts
+++ b/src/context/contextFileSelected.ts
@@ -1,8 +1,8 @@
 
-import * as vscode from 'vscode';
 import * as path from 'path';
 import * as fs from 'fs';
 import { createTempSubdirectory, getLanguageIdByFileName } from '../util/commonUtil';
+import { UiUtilWrapper } from '../util/uiUtil';
 
 export async function handleFileSelected(fileSelected: string) {
     // get file name from fileSelected
@@ -18,7 +18,7 @@ export async function handleFileSelected(fileSelected: string) {
     const languageId = await getLanguageIdByFileName(fileSelected);
 
 	// get relative path of workspace
-	const workspaceDir = vscode.workspace.workspaceFolders?.[0].uri.fsPath;
+	const workspaceDir = UiUtilWrapper.workspaceFoldersFirstPath();
 	const relativePath = path.relative(workspaceDir!, fileSelected);
 
     // convert fileContent to markdown code block with languageId and file path
@@ -30,7 +30,7 @@ export async function handleFileSelected(fileSelected: string) {
 	const jsonData = JSON.stringify(data);
 
     // save markdownCodeBlock to temp file
-    await vscode.workspace.fs.writeFile(vscode.Uri.file(tempFile), Buffer.from(jsonData));
+    await UiUtilWrapper.writeFile(tempFile, jsonData);
 
     return `[context|${tempFile}]`;
 }
\ No newline at end of file
diff --git a/src/context/contextRef.ts b/src/context/contextRef.ts
index efbdc11..ec52f91 100644
--- a/src/context/contextRef.ts
+++ b/src/context/contextRef.ts
@@ -1,5 +1,4 @@
 
-import * as vscode from 'vscode';
 import * as path from 'path';
 import { createTempSubdirectory, runCommandStringAndWriteOutput } from '../util/commonUtil';
 import { logger } from '../util/logger';
diff --git a/src/contributes/commands.ts b/src/contributes/commands.ts
index bfdc629..48d6bc2 100644
--- a/src/contributes/commands.ts
+++ b/src/contributes/commands.ts
@@ -1,186 +1,184 @@
 import * as vscode from 'vscode';
-import ChatPanel from '../panel/chatPanel';
 import { sendFileSelectMessage, sendCodeSelectMessage } from './util';
-import { logger } from '../util/logger';
-import * as childProcess from 'child_process';
-import { DevChatViewProvider } from '../panel/devchatView';
 import ExtensionContextHolder from '../util/extensionContext';
+import { TopicManager } from '../topic/topicManager';
+import { TopicTreeDataProvider, TopicTreeItem } from '../panel/topicView';
+import { FilePairManager } from '../util/diffFilePairs';
+import { ApiKeyManager } from '../util/apiKey';
 
-import * as process from 'process';
-
-export function checkDevChatDependency(): boolean {
-  try {
-    // Get pipx environment
-    const pipxEnvOutput = childProcess.execSync('python3 -m pipx environment').toString();
-    const binPathRegex = /PIPX_BIN_DIR=\s*(.*)/;
-
-    // Get BIN path from pipx environment
-    const match = pipxEnvOutput.match(binPathRegex);
-    if (match && match[1]) {
-      const binPath = match[1];
-
-      // Add BIN path to PATH
-      process.env.PATH = `${binPath}:${process.env.PATH}`;
-
-      // Check if DevChat is installed
-      childProcess.execSync('devchat --help');
-      return true;
-    } else {
-      return false;
-    }
-  } catch (error) {
-    // DevChat dependency check failed
-    return false;
-  }
-}
-
-export async function checkOpenaiApiKey() {
-	const secretStorage: vscode.SecretStorage = ExtensionContextHolder.context!.secrets;
-	let openaiApiKey = await secretStorage.get("devchat_OPENAI_API_KEY");
-	if (!openaiApiKey) {
-		openaiApiKey = vscode.workspace.getConfiguration('DevChat').get('API_KEY');
-	}
-	if (!openaiApiKey) {
-		openaiApiKey = process.env.OPENAI_API_KEY;
-	}
-	if (!openaiApiKey) {
-		return false;
-	}
-	return true;
-}
-
-function checkOpenaiKey() {
-	let openaiApiKey = vscode.workspace.getConfiguration('DevChat').get('API_KEY');
-	if (!openaiApiKey) {
-		openaiApiKey = process.env.OPENAI_API_KEY;
-	}
-	if (!openaiApiKey) {
-		// OpenAI key not set
-		vscode.window.showInputBox({
-			placeHolder: 'Please input your OpenAI API key (or DevChat access key)'
-		}).then((value) => {
-			if (value) {
-				// 设置用户输入的API Key
-				vscode.workspace.getConfiguration('DevChat').update('API_KEY', value, true);
-			}
-		});
-		return false;
-	}
-	return true;
-}
-
-function checkDependencyPackage() {
-	const dependencyInstalled = checkDevChatDependency();
-	if (!dependencyInstalled) {
-		// Prompt the user, whether to install devchat using pip3 install devchat
-		const installPrompt = 'devchat is not installed. Do you want to install it using pip3 install devchat?';
-		const installAction = 'Install';
-
-		vscode.window.showInformationMessage(installPrompt, installAction).then((selectedAction) => {
-			if (selectedAction === installAction) {
-				// Install devchat using pip3 install devchat
-				const terminal = vscode.window.createTerminal("DevChat Install");
-				terminal.sendText("pip3 install --upgrade devchat");
-				terminal.show();
-			}
-		});
-	}
-
-	if (!checkOpenaiKey()) {
-		return;
-	}
-}
 
 function registerOpenChatPanelCommand(context: vscode.ExtensionContext) {
-    let disposable = vscode.commands.registerCommand('devchat.openChatPanel',async () => {
+	let disposable = vscode.commands.registerCommand('devchat.openChatPanel', async () => {
 		await vscode.commands.executeCommand('devchat-view.focus');
-    });
-    context.subscriptions.push(disposable);
+	});
+	context.subscriptions.push(disposable);
 }
 
 async function ensureChatPanel(context: vscode.ExtensionContext): Promise<boolean> {
-    await vscode.commands.executeCommand('devchat-view.focus');
-    return true;
+	await vscode.commands.executeCommand('devchat-view.focus');
+	return true;
 }
 
 function registerAddContextCommand(context: vscode.ExtensionContext) {
-    const disposableAddContext = vscode.commands.registerCommand('devchat.addConext', async (uri: { path: any; }) => {
-        if (!await ensureChatPanel(context)) {
-            return;
-        }
+	const callback = async (uri: { path: any; }) => {
+		if (!await ensureChatPanel(context)) {
+			return;
+		}
 
-        await sendFileSelectMessage(ExtensionContextHolder.provider?.view()!, uri.path);
-    });
-    context.subscriptions.push(disposableAddContext);
-
-	const disposableAddContextChinese = vscode.commands.registerCommand('devchat.addConext_chinese', async (uri: { path: any; }) => {
-        if (!await ensureChatPanel(context)) {
-            return;
-        }
-
-        await sendFileSelectMessage(ExtensionContextHolder.provider?.view()!, uri.path);
-    });
-    context.subscriptions.push(disposableAddContextChinese);
+		await sendFileSelectMessage(ExtensionContextHolder.provider?.view()!, uri.path);
+	};
+	context.subscriptions.push(vscode.commands.registerCommand('devchat.addConext', callback));
+	context.subscriptions.push(vscode.commands.registerCommand('devchat.addConext_chinese', callback));
 }
 
 function registerAskForCodeCommand(context: vscode.ExtensionContext) {
-    const disposableCodeContext = vscode.commands.registerCommand('devchat.askForCode', async () => {
-        const editor = vscode.window.activeTextEditor;
-        if (editor) {
-            if (!await ensureChatPanel(context)) {
-                return;
-            }
+	const callback = async () => {
+		const editor = vscode.window.activeTextEditor;
+		if (editor) {
+			if (!await ensureChatPanel(context)) {
+				return;
+			}
 
-            const selectedText = editor.document.getText(editor.selection);
-            await sendCodeSelectMessage(ExtensionContextHolder.provider?.view()!, editor.document.fileName, selectedText);
-        }
-    });
-    context.subscriptions.push(disposableCodeContext);
-
-	const disposableCodeContextChinese = vscode.commands.registerCommand('devchat.askForCode_chinese', async () => {
-        const editor = vscode.window.activeTextEditor;
-        if (editor) {
-            if (!await ensureChatPanel(context)) {
-                return;
-            }
-
-            const selectedText = editor.document.getText(editor.selection);
-            await sendCodeSelectMessage(ExtensionContextHolder.provider?.view()!, editor.document.fileName, selectedText);
-        }
-    });
-    context.subscriptions.push(disposableCodeContextChinese);
+			const selectedText = editor.document.getText(editor.selection);
+			await sendCodeSelectMessage(ExtensionContextHolder.provider?.view()!, editor.document.fileName, selectedText);
+		}
+	};
+	context.subscriptions.push(vscode.commands.registerCommand('devchat.askForCode', callback));
+	context.subscriptions.push(vscode.commands.registerCommand('devchat.askForCode_chinese', callback));
 }
 
 function registerAskForFileCommand(context: vscode.ExtensionContext) {
-    const disposableAskFile = vscode.commands.registerCommand('devchat.askForFile', async () => {
-        const editor = vscode.window.activeTextEditor;
-        if (editor) {
-            if (!await ensureChatPanel(context)) {
-                return;
-            }
+	const callback = async () => {
+		const editor = vscode.window.activeTextEditor;
+		if (editor) {
+			if (!await ensureChatPanel(context)) {
+				return;
+			}
 
-            await sendFileSelectMessage(ExtensionContextHolder.provider?.view()!, editor.document.fileName);
-        }
-    });
-    context.subscriptions.push(disposableAskFile);
+			await sendFileSelectMessage(ExtensionContextHolder.provider?.view()!, editor.document.fileName);
+		}
+	};
+	context.subscriptions.push(vscode.commands.registerCommand('devchat.askForFile', callback));
+	context.subscriptions.push(vscode.commands.registerCommand('devchat.askForFile_chinese', callback));
+}
 
-	const disposableAskFileChinese = vscode.commands.registerCommand('devchat.askForFile_chinese', async () => {
-        const editor = vscode.window.activeTextEditor;
-        if (editor) {
-            if (!await ensureChatPanel(context)) {
-                return;
-            }
+export function registerApiKeySettingCommand(context: vscode.ExtensionContext) {
+	const secretStorage: vscode.SecretStorage = context.secrets;
+	context.subscriptions.push(
+		vscode.commands.registerCommand('DevChat.OPENAI_API_KEY', async () => {
+			const passwordInput: string = await vscode.window.showInputBox({
+				password: true,
+				title: "Input Access Key",
+				placeHolder: "Set OPENAI_API_KEY (or DevChat Access Key)"
+			}) ?? '';
 
-            await sendFileSelectMessage(ExtensionContextHolder.provider?.view()!, editor.document.fileName);
-        }
-    });
-    context.subscriptions.push(disposableAskFileChinese);
+			ApiKeyManager.writeApiKeySecret(passwordInput);
+		})
+	);
+}
+
+export function registerStatusBarItemClickCommand(context: vscode.ExtensionContext) {
+	context.subscriptions.push(
+		vscode.commands.registerCommand('devcaht.onStatusBarClick', async () => {
+			await vscode.commands.executeCommand('devchat-view.focus');
+		})
+	);
+}
+
+const topicDeleteCallback = async (item: TopicTreeItem) => {
+	const confirm = 'Delete';
+	const cancel = 'Cancel';
+	const label = typeof item.label === 'string' ? item.label : item.label!.label;
+	const truncatedLabel = label.substring(0, 20) + (label.length > 20 ? '...' : '');
+	const result = await vscode.window.showWarningMessage(
+		`Are you sure you want to delete the topic "${truncatedLabel}"?`,
+		{ modal: true },
+		confirm,
+		cancel
+	);
+
+	if (result === confirm) {
+		TopicManager.getInstance().deleteTopic(item.id);
+	}
+};
+;
+
+export function regTopicDeleteCommand(context: vscode.ExtensionContext) {
+	context.subscriptions.push(
+		vscode.commands.registerCommand('devchat-topicview.deleteTopic', topicDeleteCallback)
+	);
+}
+
+export function regAddTopicCommand(context: vscode.ExtensionContext) {
+	context.subscriptions.push(
+		vscode.commands.registerCommand('devchat-topicview.addTopic', () => {
+			const topic = TopicManager.getInstance().createTopic();
+			TopicManager.getInstance().setCurrentTopic(topic.topicId);
+		})
+	);
+}
+
+export function regDeleteSelectTopicCommand(context: vscode.ExtensionContext) {
+	context.subscriptions.push(
+		vscode.commands.registerCommand('devchat-topicview.deleteSelectedTopic', () => {
+			const selectedItem = TopicTreeDataProvider.getInstance().selectedItem;
+			if (selectedItem) {
+				topicDeleteCallback(selectedItem);
+			} else {
+				vscode.window.showErrorMessage('No item selected');
+			}
+		})
+	);
+}
+
+export function regSelectTopicCommand(context: vscode.ExtensionContext) {
+	context.subscriptions.push(
+		vscode.commands.registerCommand('devchat-topicview.selectTopic', (item: TopicTreeItem) => {
+			TopicTreeDataProvider.getInstance().setSelectedItem(item);
+			TopicManager.getInstance().setCurrentTopic(item.id);
+		})
+	);
+}
+
+export function regReloadTopicCommand(context: vscode.ExtensionContext) {
+	context.subscriptions.push(
+		vscode.commands.registerCommand('devchat-topicview.reloadTopic', async () => {
+			TopicManager.getInstance().loadTopics();
+		})
+	);
+}
+
+export function regApplyDiffResultCommand(context: vscode.ExtensionContext) {
+	context.subscriptions.push(
+		vscode.commands.registerCommand('devchat.applyDiffResult', async () => {
+			const activeEditor = vscode.window.activeTextEditor;
+			const fileName = activeEditor!.document.fileName;
+
+			const [leftUri, rightUri] = FilePairManager.getInstance().findPair(fileName) || [undefined, undefined];
+			if (leftUri && rightUri) {
+				// 获取对比的两个文件
+				const leftDoc = await vscode.workspace.openTextDocument(leftUri);
+				const rightDoc = await vscode.workspace.openTextDocument(rightUri);
+
+				// 将右边文档的内容替换到左边文档
+				const leftEditor = await vscode.window.showTextDocument(leftDoc);
+				await leftEditor.edit(editBuilder => {
+					const fullRange = new vscode.Range(0, 0, leftDoc.lineCount, 0);
+					editBuilder.replace(fullRange, rightDoc.getText());
+				});
+
+				// 保存左边文档
+				await leftDoc.save();
+			} else {
+				vscode.window.showErrorMessage('No file to apply diff result.');
+			}
+		})
+	);
 }
 
 export {
-	checkDependencyPackage,
-    registerOpenChatPanelCommand,
-    registerAddContextCommand,
-    registerAskForCodeCommand,
-    registerAskForFileCommand,
+	registerOpenChatPanelCommand,
+	registerAddContextCommand,
+	registerAskForCodeCommand,
+	registerAskForFileCommand,
 };
diff --git a/src/contributes/commandsBase.ts b/src/contributes/commandsBase.ts
new file mode 100644
index 0000000..866e1aa
--- /dev/null
+++ b/src/contributes/commandsBase.ts
@@ -0,0 +1,42 @@
+// src/contributes/commandsBase.ts
+
+import { runCommand } from "../util/commonUtil";
+
+
+export function checkDevChatDependency(): boolean {
+  try {
+    const binPath = getPipxEnvironmentPath();
+
+    if (binPath) {
+      updateEnvironmentPath(binPath);
+
+      // Check if DevChat is installed
+      runCommand('devchat --help');
+      return true;
+    } else {
+      return false;
+    }
+  } catch (error) {
+    // DevChat dependency check failed
+    return false;
+  }
+}
+
+export function getPipxEnvironmentPath(): string | null {
+  // Get pipx environment
+  const pipxEnvOutput = runCommand('python3 -m pipx environment').toString();
+  const binPathRegex = /PIPX_BIN_DIR=\s*(.*)/;
+
+  // Get BIN path from pipx environment
+  const match = pipxEnvOutput.match(binPathRegex);
+  if (match && match[1]) {
+    return match[1];
+  } else {
+    return null;
+  }
+}
+
+function updateEnvironmentPath(binPath: string): void {
+  // Add BIN path to PATH
+  process.env.PATH = `${binPath}:${process.env.PATH}`;
+}
\ No newline at end of file
diff --git a/src/contributes/context.ts b/src/contributes/context.ts
new file mode 100644
index 0000000..8a4e23b
--- /dev/null
+++ b/src/contributes/context.ts
@@ -0,0 +1,10 @@
+import * as vscode from 'vscode';
+
+export function regLanguageContext() {
+	const currentLocale = vscode.env.language;
+	if (currentLocale === 'zh-cn' || currentLocale === 'zh-tw') {
+		vscode.commands.executeCommand('setContext', 'isChineseLocale', true);
+	} else {
+		vscode.commands.executeCommand('setContext', 'isChineseLocale', false);
+	}
+}
\ No newline at end of file
diff --git a/src/contributes/util.ts b/src/contributes/util.ts
index 625c2f7..0a30a60 100644
--- a/src/contributes/util.ts
+++ b/src/contributes/util.ts
@@ -4,15 +4,18 @@ import { handleCodeSelected } from '../context/contextCodeSelected';
 import { handleFileSelected } from '../context/contextFileSelected';
 import { MessageHandler } from '../handler/messageHandler';
 import { regInMessage, regOutMessage } from '../util/reg_messages';
+import { logger } from '../util/logger';
 
 regOutMessage({command: 'appendContext', context: ''});
 export async function sendFileSelectMessage(panel: vscode.WebviewPanel|vscode.WebviewView, filePath: string): Promise<void> {
+	logger.channel()?.info(`Append context: ${filePath}`);
 	const codeContext = await handleFileSelected(filePath);
 	MessageHandler.sendMessage(panel, { command: 'appendContext', context: codeContext });
 }
 
 regOutMessage({command: 'appendContext', context: ''});
 export async function sendCodeSelectMessage(panel: vscode.WebviewPanel|vscode.WebviewView, filePath: string, codeBlock: string): Promise<void> {
+	logger.channel()?.info(`Append context: ${filePath}`);
 	const codeContext = await handleCodeSelected(filePath, codeBlock);
 	MessageHandler.sendMessage(panel, { command: 'appendContext', context: codeContext });
 }
\ No newline at end of file
diff --git a/src/contributes/views.ts b/src/contributes/views.ts
new file mode 100644
index 0000000..911b77f
--- /dev/null
+++ b/src/contributes/views.ts
@@ -0,0 +1,21 @@
+import * as vscode from 'vscode';
+import { DevChatViewProvider } from '../panel/devchatView';
+import { TopicTreeDataProvider } from '../panel/topicView';
+import ExtensionContextHolder from '../util/extensionContext';
+
+
+export function regDevChatView(context: vscode.ExtensionContext) {
+	ExtensionContextHolder.provider = new DevChatViewProvider(context);
+	context.subscriptions.push(
+		vscode.window.registerWebviewViewProvider('devchat-view', ExtensionContextHolder.provider, {
+			webviewOptions: { retainContextWhenHidden: true }
+		})
+	);
+}
+
+export function regTopicView(context: vscode.ExtensionContext) {
+	const yourTreeView = vscode.window.createTreeView('devchat-topicview', {
+		treeDataProvider: TopicTreeDataProvider.getInstance(),
+	});
+	context.subscriptions.push(yourTreeView);
+}
\ No newline at end of file
diff --git a/src/extension.ts b/src/extension.ts
index a4dd23f..d9cdbf9 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -1,358 +1,55 @@
 import * as vscode from 'vscode';
-import * as fs from 'fs';
 
 import {
-	checkOpenaiApiKey,
-	checkDevChatDependency,
-	checkDependencyPackage,
 	registerOpenChatPanelCommand,
 	registerAddContextCommand,
 	registerAskForCodeCommand,
 	registerAskForFileCommand,
+	registerApiKeySettingCommand,
+	regTopicDeleteCommand,
+	regAddTopicCommand,
+	regDeleteSelectTopicCommand,
+	regSelectTopicCommand,
+	regReloadTopicCommand,
+	regApplyDiffResultCommand,
+	registerStatusBarItemClickCommand,
 } from './contributes/commands';
+import { regLanguageContext } from './contributes/context';
+import { regDevChatView, regTopicView } from './contributes/views';
 
 import ExtensionContextHolder from './util/extensionContext';
 import { logger } from './util/logger';
-import { DevChatViewProvider } from './panel/devchatView';
-import path from 'path';
-import { FilePairManager } from './util/diffFilePairs';
-import { Topic, TopicManager } from './topic/topicManager';
-
-
-class TopicTreeItem extends vscode.TreeItem {
-	id: string;
-	date: number | undefined;
-	constructor(label: string, id: string, date: number | undefined, collapsibleState: vscode.TreeItemCollapsibleState) {
-		super(label, collapsibleState);
-		this.id = id;
-		this.date = date;
-		this.iconPath = new vscode.ThemeIcon('symbol-variable');
-		this.contextValue = 'yourTreeItem'; // 添加这一行
-	}
-}
-
-class TopicTreeDataProvider implements vscode.TreeDataProvider<TopicTreeItem> {
-	private _onDidChangeTreeData: vscode.EventEmitter<TopicTreeItem | undefined | null | void> = new vscode.EventEmitter<TopicTreeItem | undefined | null | void>();
-	readonly onDidChangeTreeData: vscode.Event<TopicTreeItem | undefined | null | void> = this._onDidChangeTreeData.event;
-
-	public selectedItem: TopicTreeItem | null = null;
-	private items: TopicTreeItem[] = [];
-
-	// reg listeners to TopicManager in constructor
-	constructor() {
-		TopicManager.getInstance().addOnCreateTopicListener(this.addItem.bind(this));
-		TopicManager.getInstance().addOnDeleteTopicListener(this.onDeleteTopic.bind(this));
-		TopicManager.getInstance().addOnReloadTopicsListener(this.onReloadTopics.bind(this));
-		TopicManager.getInstance().addOnUpdateTopicListener(this.onUpdateTopics.bind(this));
-	}
-
-	// sort items
-	private sortItems() {
-		this.items.sort((a, b) => {
-			if (a.date && b.date) {
-				return b.date - a.date;
-			} else if (!a.date) {
-				return -1;
-			} else if (!b.date) {
-				return 1;
-			} else {
-				return 0;
-			}
-		});
-	}
-
-	onUpdateTopics(topicId: string) {
-		const items = this.items.filter(i => i.id === topicId);
-		const topic = TopicManager.getInstance().getTopic(topicId);
-		items.map((item) => {
-			item.label = topic?.name;
-			item.date = topic?.lastUpdated;
-		});
-		this.sortItems();
-		this._onDidChangeTreeData.fire();
-	}
-
-	onReloadTopics(topics: Topic[]) {
-		const items = topics.map((topic) => {
-			return new TopicTreeItem(topic.name ? topic.name : "new topic", topic.topicId, topic.lastUpdated, vscode.TreeItemCollapsibleState.None);
-		});
-		this.items = items;
-		this.sortItems();
-		this._onDidChangeTreeData.fire();
-	}
-
-	onDeleteTopic(topicId: string) {
-		this.items = this.items.filter(i => i.id !== topicId);
-		this.sortItems();
-		this._onDidChangeTreeData.fire();
-	}
-
-	setSelectedItem(item: TopicTreeItem): void {
-		this.selectedItem = item;
-	}
-
-	getChildren(element?: TopicTreeItem): vscode.ProviderResult<TopicTreeItem[]> {
-		return this.items;
-	}
-
-	getTreeItem(element: TopicTreeItem): vscode.TreeItem | Thenable<vscode.TreeItem> {
-		element.command = {
-			title: 'Select Item',
-			command: 'devchat-topicview.selectTopic',
-			arguments: [element],
-		};
-		return element;
-	}
-
-	reload(): void {
-		const topicList = TopicManager.getInstance().getTopicList();
-		this.onReloadTopics(topicList);
-	}
-
-	addItem(topic: Topic): void {
-		const newItem = new TopicTreeItem(topic.name ? topic.name : "new topic", topic.topicId, topic.lastUpdated, vscode.TreeItemCollapsibleState.None);
-		this.items.push(newItem);
-		this.sortItems();
-		this._onDidChangeTreeData.fire();
-	}
-
-
-	deleteItem(item: TopicTreeItem): void {
-		this.items = this.items.filter(i => i !== item);
-		this.sortItems();
-		this._onDidChangeTreeData.fire();
-	}
-}
-
-function getExtensionVersion(context: vscode.ExtensionContext): string {
-	const packageJsonPath = path.join(context.extensionUri.fsPath, 'package.json');
-	const packageJsonContent = fs.readFileSync(packageJsonPath, 'utf8');
-	const packageJson = JSON.parse(packageJsonContent);
-
-	return packageJson.version;
-}
+import { LoggerChannelVscode } from './util/logger_vscode';
+import { createStatusBarItem } from './panel/statusBarView';
+import { UiUtilWrapper } from './util/uiUtil';
+import { UiUtilVscode } from './util/uiUtil_vscode';
 
 
 function activate(context: vscode.ExtensionContext) {
 	ExtensionContextHolder.context = context;
-	const extensionVersion = getExtensionVersion(context);
-	logger.init(context);
 
-	const secretStorage: vscode.SecretStorage = context.secrets;
-	vscode.commands.registerCommand('DevChat.OPENAI_API_KEY', async () => {
-		const passwordInput: string = await vscode.window.showInputBox({
-			password: true,
-			title: "OPENAI_API_KEY"
-		}) ?? '';
+	logger.init(LoggerChannelVscode.getInstance());
+	UiUtilWrapper.init(new UiUtilVscode());
 
-		secretStorage.store("devchat_OPENAI_API_KEY", passwordInput);
-	});
+	regLanguageContext();
 
-	const currentLocale = vscode.env.language;
-	if (currentLocale === 'zh-cn' || currentLocale === 'zh-tw') {
-		vscode.commands.executeCommand('setContext', 'isChineseLocale', true);
-	} else {
-		vscode.commands.executeCommand('setContext', 'isChineseLocale', false);
-	}
+	regDevChatView(context);
+	regTopicView(context);
 
+	registerApiKeySettingCommand(context);
 	registerOpenChatPanelCommand(context);
 	registerAddContextCommand(context);
 	registerAskForCodeCommand(context);
 	registerAskForFileCommand(context);
+	registerStatusBarItemClickCommand(context);
 
-	const statusBarItem = vscode.window.createStatusBarItem(vscode.StatusBarAlignment.Right, 100);
+	createStatusBarItem(context);
 
-	// Set the status bar item properties
-	// const iconPath = context.asAbsolutePath(path.join('assets', 'tank.png'));
-
-	// Set the status bar item properties
-	statusBarItem.text = `$(warning)DevChat`;
-	statusBarItem.tooltip = 'DevChat checking ..., please wait.';
-	statusBarItem.command = '';
-
-	// add a timer to update the status bar item
-	let devchatStatus = '';
-	let apiKeyStatus = '';
-	let isVersionChangeCompare: boolean|undefined = undefined;
-	setInterval(async () => {
-		const versionOld = await secretStorage.get("DevChatVersionOld");
-		const versionNew = extensionVersion;
-		const versionChanged = versionOld !== versionNew;
-		await secretStorage.store("DevChatVersionOld", versionNew!);
-		
-		// status item has three status type
-		// 1. not in a folder
-		// 2. dependence is invalid
-		// 3. ready
-		if (devchatStatus === '' || devchatStatus === 'waiting install devchat') {
-			let bOk = true;
-			let devChat: string | undefined = vscode.workspace.getConfiguration('DevChat').get('DevChatPath');
-			if (!devChat) {
-				bOk = false;
-			}
-
-			if (!bOk) {
-				bOk = checkDevChatDependency();
-			}
-			if (bOk && versionChanged && !isVersionChangeCompare) {
-				logger.channel()?.info(`versionOld: ${versionOld}, versionNew: ${versionNew}, versionChanged: ${versionChanged}`);
-				bOk = false;
-			}
-
-			if (bOk) {
-				devchatStatus = 'ready';
-				TopicManager.getInstance().loadTopics();
-			} else {
-				if (devchatStatus === '') {
-					devchatStatus = 'not ready';
-				}
-			}
-		}
-		if (devchatStatus === 'not ready') {
-			// auto install devchat
-			const terminal = vscode.window.createTerminal("DevChat Install");
-			terminal.sendText(`python ${context.extensionUri.fsPath + "/tools/install.py"}`);
-			terminal.show();
-			devchatStatus = 'waiting install devchat';
-			isVersionChangeCompare = true;
-		}
-
-		if (devchatStatus !== 'ready') {
-			statusBarItem.text = `$(warning)DevChat`;
-			statusBarItem.tooltip = `${devchatStatus}`;
-			statusBarItem.command = undefined;
-			// set statusBarItem warning color
-			return;
-		}
-
-		// check api key
-		if (apiKeyStatus === '' || apiKeyStatus === 'please set api key') {
-			const bOk = await checkOpenaiApiKey();
-			if (bOk) {
-				apiKeyStatus = 'ready';
-			} else {
-				apiKeyStatus = 'please set api key';
-			}
-		}
-		if (apiKeyStatus !== 'ready') {
-			statusBarItem.text = `$(warning)DevChat`;
-			statusBarItem.tooltip = `${apiKeyStatus}`;
-			statusBarItem.command = 'DevChat.OPENAI_API_KEY';
-			return;
-		}
-
-		statusBarItem.text = `$(pass)DevChat`;
-		statusBarItem.tooltip = `ready to chat`;
-		statusBarItem.command = 'devcaht.onStatusBarClick';
-	}, 3000);
-
-	// Add the status bar item to the status bar
-	statusBarItem.show();
-	context.subscriptions.push(statusBarItem);
-
-	// Register the command
-	context.subscriptions.push(
-		vscode.commands.registerCommand('devcaht.onStatusBarClick', async () => {
-			await vscode.commands.executeCommand('devchat-view.focus');
-		})
-	);
-
-	ExtensionContextHolder.provider = new DevChatViewProvider(context);
-	context.subscriptions.push(
-		vscode.window.registerWebviewViewProvider('devchat-view', ExtensionContextHolder.provider, {
-			webviewOptions: { retainContextWhenHidden: true }
-		})
-	);
-
-	const yourTreeDataProvider = new TopicTreeDataProvider();
-	const yourTreeView = vscode.window.createTreeView('devchat-topicview', {
-		treeDataProvider: yourTreeDataProvider,
-	});
-	context.subscriptions.push(yourTreeView);
-
-	const topicDeleteCallback = async (item: TopicTreeItem) => {
-		const confirm = 'Delete';
-		const cancel = 'Cancel';
-		const label = typeof item.label === 'string' ? item.label : item.label!.label;
-		const truncatedLabel = label.substring(0, 20) + (label.length > 20 ? '...' : '');
-		const result = await vscode.window.showWarningMessage(
-			`Are you sure you want to delete the topic "${truncatedLabel}"?`,
-			{ modal: true },
-			confirm,
-			cancel
-		);
-
-		if (result === confirm) {
-			TopicManager.getInstance().deleteTopic(item.id);
-		}
-	};
-	vscode.commands.registerCommand('devchat-topicview.deleteTopic', topicDeleteCallback);
-
-	context.subscriptions.push(
-		vscode.languages.registerCodeActionsProvider(
-			{ pattern: '**', scheme: 'file' },
-			{
-				provideCodeActions: (document, range, context, token) => {
-					const deleteAction = new vscode.CodeAction('Delete Item', vscode.CodeActionKind.QuickFix);
-					deleteAction.command = {
-						title: 'Delete Item',
-						command: 'devchat-topicview.deleteTopic',
-						arguments: [context.diagnostics[0].code],
-					};
-					return [deleteAction];
-				},
-			},
-			{ providedCodeActionKinds: [vscode.CodeActionKind.QuickFix] }
-		)
-	);
-
-	vscode.commands.registerCommand('devchat-topicview.addTopic', () => {
-		const topic = TopicManager.getInstance().createTopic();
-		TopicManager.getInstance().setCurrentTopic(topic.topicId);
-	});
-
-	vscode.commands.registerCommand('devchat-topicview.deleteSelectedTopic', () => {
-		const selectedItem = yourTreeDataProvider.selectedItem;
-		if (selectedItem) {
-			topicDeleteCallback(selectedItem);
-		} else {
-			vscode.window.showErrorMessage('No item selected');
-		}
-	});
-
-	vscode.commands.registerCommand('devchat-topicview.selectTopic', (item: TopicTreeItem) => {
-		yourTreeDataProvider.setSelectedItem(item);
-		TopicManager.getInstance().setCurrentTopic(item.id);
-	});
-
-	vscode.commands.registerCommand('devchat-topicview.reloadTopic', async (item: TopicTreeItem) => {
-		TopicManager.getInstance().loadTopics();
-	});
-
-	context.subscriptions.push(
-		vscode.commands.registerCommand('devchat.applyDiffResult', async (data) => {
-			const activeEditor = vscode.window.activeTextEditor;
-			const fileName = activeEditor!.document.fileName;
-
-			const [leftUri, rightUri] = FilePairManager.getInstance().findPair(fileName) || [undefined, undefined];
-			if (leftUri && rightUri) {
-				// 获取对比的两个文件
-				const leftDoc = await vscode.workspace.openTextDocument(leftUri);
-				const rightDoc = await vscode.workspace.openTextDocument(rightUri);
-
-				// 将右边文档的内容替换到左边文档
-				const leftEditor = await vscode.window.showTextDocument(leftDoc);
-				await leftEditor.edit(editBuilder => {
-					const fullRange = new vscode.Range(0, 0, leftDoc.lineCount, 0);
-					editBuilder.replace(fullRange, rightDoc.getText());
-				});
-
-				// 保存左边文档
-				await leftDoc.save();
-			} else {
-				vscode.window.showErrorMessage('No file to apply diff result.');
-			}
-		})
-	);
+	regTopicDeleteCommand(context);
+	regAddTopicCommand(context);
+	regDeleteSelectTopicCommand(context);
+	regSelectTopicCommand(context);
+	regReloadTopicCommand(context);
+	regApplyDiffResultCommand(context);
 }
 exports.activate = activate;
diff --git a/src/handler/contextDetail.ts b/src/handler/contextDetail.ts
index fce2a2a..c6caf34 100644
--- a/src/handler/contextDetail.ts
+++ b/src/handler/contextDetail.ts
@@ -2,15 +2,19 @@ import * as vscode from 'vscode';
 import * as fs from 'fs';
 import { MessageHandler } from './messageHandler';
 import { regInMessage, regOutMessage } from '../util/reg_messages';
+import { logger } from '../util/logger';
 
 
-regInMessage({command: 'contextDetail', file: ''});
-regOutMessage({command: 'contextDetailResponse', file: '', result: ''});
+regInMessage({ command: 'contextDetail', file: '' });
+regOutMessage({ command: 'contextDetailResponse', file: '', result: '' });
 // message: { command: 'contextDetail', file: string }
 // read detail context information from file
 // return json string
-export async function contextDetail(message: any, panel: vscode.WebviewPanel|vscode.WebviewView): Promise<void> {
-	const fileContent = fs.readFileSync(message.file, 'utf-8');
-    MessageHandler.sendMessage(panel, { command: 'contextDetailResponse', 'file':message.file, result: fileContent });
-	return;
+export async function contextDetail(message: any, panel: vscode.WebviewPanel | vscode.WebviewView): Promise<void> { 
+	try { 
+		const fileContent = fs.readFileSync(message.file, 'utf-8'); 
+		MessageHandler.sendMessage(panel, { command: 'contextDetailResponse', 'file': message.file, result: fileContent }); 
+	} catch (error) { 
+		logger.channel()?.error(`Error reading file ${ message.file }:, ${error}`); 
+	} 
 }
diff --git a/src/handler/historyMessages.ts b/src/handler/historyMessages.ts
index d53bdd2..9c73ea1 100644
--- a/src/handler/historyMessages.ts
+++ b/src/handler/historyMessages.ts
@@ -1,141 +1,21 @@
 import * as vscode from 'vscode';
-import DevChat, { LogOptions, LogEntry } from '../toolwrapper/devchat';
 import { MessageHandler } from './messageHandler';
-import messageHistory from '../util/messageHistory';
 import { regInMessage, regOutMessage } from '../util/reg_messages';
-import { checkOpenaiApiKey } from '../contributes/commands';
-import ExtensionContextHolder from '../util/extensionContext';
-import { TopicManager } from '../topic/topicManager';
+import { historyMessagesBase, onApiKeyBase } from './historyMessagesBase';
 
 
-let isApiSet: boolean | undefined = undefined;
-
-interface LoadHistoryMessages {
-	command: string;
-	entries: Array<LogEntry>;
-}
-
-function welcomeMessage(): LogEntry {
-	// create default logEntry to show welcome message
-	return {
-		hash: 'message',
-		parent: '',
-		user: 'system',
-		date: '',
-		request: 'How do I use DevChat?',
-		response: `
-Do you want to write some code or have a question about the project? Simply right-click on your chosen files or code snippets and add them to DevChat. Feel free to ask me anything or let me help you with coding.
-
-Don't forget to check out the "+" button on the left of the input to add more context. To see a list of workflows you can run in the context, just type "/". Happy prompting!
-		`,
-		context: []
-	} as LogEntry;
-}
-
-function apiKeyMissedMessage(): LogEntry {
-	// create default logEntry to show welcome message
-	return {
-		hash: 'message',
-		parent: '',
-		user: 'system',
-		date: '',
-		request: 'Is OPENAI_API_KEY ready?',
-		response: `
-OPENAI_API_KEY is missing from your environment or settings. Kindly input your OpenAI or DevChat key, and I'll ensure DevChat is all set for you.
-		`,
-		context: []
-	} as LogEntry;
-}
-
 
 regInMessage({command: 'historyMessages', options: { skip: 0, maxCount: 0 }});
 regOutMessage({command: 'loadHistoryMessages', entries: [{hash: '',user: '',date: '',request: '',response: '',context: [{content: '',role: ''}]}]});
 export async function historyMessages(message: any, panel: vscode.WebviewPanel|vscode.WebviewView): Promise<void> {
-	const topicId = TopicManager.getInstance().currentTopicId;
-	let logEntriesFlat: Array<LogEntry> = [];
-	if (topicId) {
-		logEntriesFlat = await TopicManager.getInstance().getTopicHistory(topicId);
+	const historyMessage = await historyMessagesBase();
+	if (historyMessage) {
+		MessageHandler.sendMessage(panel, historyMessage);
 	}
-	messageHistory.clear();
-
-	// TODO handle context    
-	const logEntriesFlatFiltered = logEntriesFlat.map((entry) => {
-        return {
-			date: entry.date,
-			hash: entry.hash,
-			request: entry.request,
-			text: entry.response,
-			user: entry.user,
-			parentHash: '',
-		};
-    });
-
-	for (let i = 0; i < logEntriesFlat.length; i++) {
-		let entryOld = logEntriesFlat[i];
-		let entryNew = {
-			date: entryOld.date,
-			hash: entryOld.hash,
-			request: entryOld.request,
-			text: entryOld.response,
-			user: entryOld.user,
-			parentHash: '',
-		};
-		if (i > 0) {
-			entryNew.parentHash = logEntriesFlat[i - 1].hash;
-		}
-		messageHistory.add(entryNew);
-	}
-
-	const isApiKeyReady = await checkOpenaiApiKey();
-	isApiSet = true;
-	if (!isApiKeyReady) {
-		const startMessage = [ apiKeyMissedMessage() ];
-		isApiSet = false;
-
-		MessageHandler.sendMessage(panel, {
-			command: 'loadHistoryMessages',
-			entries: startMessage,
-		} as LoadHistoryMessages);
-		return;
-	}
-
-	const loadHistoryMessages: LoadHistoryMessages = {
-		command: 'loadHistoryMessages',
-		entries: logEntriesFlat.length>0? logEntriesFlat : [welcomeMessage()],
-	};
-
-	MessageHandler.sendMessage(panel, loadHistoryMessages);
-	return;
-}
-
-
-export function isValidApiKey(apiKey: string) {
-	let apiKeyStrim = apiKey.trim();
-	if (apiKeyStrim.indexOf('sk-') !== 0 && apiKeyStrim.indexOf('DC.') !== 0) {
-		return false;
-	}
-	return true;
-}
-
-export async function isWaitForApiKey() {
-	if (isApiSet === undefined) {
-		isApiSet = await checkOpenaiApiKey();
-	}
-	return !isApiSet;
 }
 
 export async function onApiKey(apiKey: string, panel: vscode.WebviewPanel|vscode.WebviewView): Promise<void> {
-	if (!isValidApiKey(apiKey)) {
-		MessageHandler.sendMessage(panel, { command: 'receiveMessage', text: 'Your API key is invalid. We support OpenAI and DevChat keys. Please reset the key.', hash: '', user: 'system', date: '', isError: false });
-		return;
-	}
-
-	isApiSet = true;
-
-	const secretStorage: vscode.SecretStorage = ExtensionContextHolder.context?.secrets!;
-	secretStorage.store("devchat_OPENAI_API_KEY", apiKey);
-
-	const welcomeMessageText =  welcomeMessage().response;
-	MessageHandler.sendMessage(panel, { command: 'receiveMessage', text: `Your OPENAI_API_KEY is set. Enjoy DevChat!\n${welcomeMessageText}`, hash: '', user: 'system', date: '', isError: false });
+	const resMessage = await onApiKeyBase(apiKey);
+	MessageHandler.sendMessage(panel, resMessage);
 }
 
diff --git a/src/handler/historyMessagesBase.ts b/src/handler/historyMessagesBase.ts
new file mode 100644
index 0000000..ef86724
--- /dev/null
+++ b/src/handler/historyMessagesBase.ts
@@ -0,0 +1,143 @@
+
+
+import { TopicManager } from '../topic/topicManager';
+import { LogEntry } from '../toolwrapper/devchat';
+import messageHistory from '../util/messageHistory';
+import { ApiKeyManager } from '../util/apiKey';
+import { logger } from '../util/logger';
+
+let isApiSet: boolean | undefined = undefined;
+
+interface LoadHistoryMessages {
+	command: string;
+	entries: Array<LogEntry>;
+}
+
+function welcomeMessage(): LogEntry {
+	// create default logEntry to show welcome message
+	return {
+		hash: 'message',
+		parent: '',
+		user: 'system',
+		date: '',
+		request: 'How do I use DevChat?',
+		response: `
+Do you want to write some code or have a question about the project? Simply right-click on your chosen files or code snippets and add them to DevChat. Feel free to ask me anything or let me help you with coding.
+
+Don't forget to check out the "+" button on the left of the input to add more context. To see a list of workflows you can run in the context, just type "/". Happy prompting!
+		`,
+		context: []
+	} as LogEntry;
+}
+
+function apiKeyMissedMessage(): LogEntry {
+	// create default logEntry to show welcome message
+	return {
+		hash: 'message',
+		parent: '',
+		user: 'system',
+		date: '',
+		request: 'Is OPENAI_API_KEY ready?',
+		response: `
+OPENAI_API_KEY is missing from your environment or settings. Kindly input your OpenAI or DevChat key, and I'll ensure DevChat is all set for you.
+		`,
+		context: []
+	} as LogEntry;
+}
+
+export function isValidApiKey(apiKey: string) {
+	let apiKeyStrim = apiKey.trim();
+	if (ApiKeyManager.getKeyType(apiKeyStrim) === undefined) {
+		return false;
+	}
+	return true;
+}
+
+export async function isWaitForApiKey() {
+	if (isApiSet === undefined) {
+		const apiKey = await ApiKeyManager.getApiKey();
+		isApiSet = apiKey !== undefined;
+	}
+	return !isApiSet;
+}
+
+export async function loadTopicHistoryLogs() : Promise<Array<LogEntry> | undefined>  {
+	const topicId = TopicManager.getInstance().currentTopicId;
+	let logEntriesFlat: Array<LogEntry> = [];
+	if (topicId) {
+		logEntriesFlat = await TopicManager.getInstance().getTopicHistory(topicId);
+	}
+
+	if (topicId !== TopicManager.getInstance().currentTopicId) {
+		logger.channel()?.info(`Current topic changed dure load topic hsitory!`)
+		return undefined;
+	}
+	return logEntriesFlat;
+}
+
+export function updateCurrentMessageHistory(logEntries: Array<LogEntry>): void {
+	messageHistory.clear();
+
+	for (let i = 0; i < logEntries.length; i++) {
+		let entryOld = logEntries[i];
+		let entryNew = {
+			date: entryOld.date,
+			hash: entryOld.hash,
+			request: entryOld.request,
+			text: entryOld.response,
+			user: entryOld.user,
+			parentHash: '',
+		};
+		if (i > 0) {
+			entryNew.parentHash = logEntries[i - 1].hash;
+		}
+		messageHistory.add(entryNew);
+	}
+}
+
+export async function apiKeyInvalidMessage(): Promise<LoadHistoryMessages|undefined> {
+	const apiKey = await ApiKeyManager.getApiKey();
+	isApiSet = true;
+	if (!apiKey) {
+		const startMessage = [ apiKeyMissedMessage() ];
+		isApiSet = false;
+		
+		return {
+			command: 'loadHistoryMessages',
+			entries: startMessage,
+		} as LoadHistoryMessages;
+	} else {
+		return undefined;
+	}
+}
+
+export async function historyMessagesBase(): Promise<LoadHistoryMessages | undefined> {
+	const logEntriesFlat = await loadTopicHistoryLogs();
+	if (!logEntriesFlat) {
+		return undefined;
+	}
+
+	updateCurrentMessageHistory(logEntriesFlat);
+	
+	const apiKeyMessage = await apiKeyInvalidMessage();
+	if (apiKeyMessage !== undefined) {
+		return apiKeyMessage;
+	}
+	
+	return {
+		command: 'loadHistoryMessages',
+		entries: logEntriesFlat.length>0? logEntriesFlat : [welcomeMessage()],
+	} as LoadHistoryMessages;
+}
+
+export async function onApiKeyBase(apiKey: string): Promise<{command: string, text: string,  hash: string, user: string, date: string, isError: boolean}> {
+	if (!isValidApiKey(apiKey)) {
+		return { command: 'receiveMessage', text: 'Your API key is invalid. We support OpenAI and DevChat keys. Please reset the key.', hash: '', user: 'system', date: '', isError: false };
+	}
+
+	isApiSet = true;
+	ApiKeyManager.writeApiKeySecret(apiKey);
+
+	const welcomeMessageText =  welcomeMessage().response;
+	return { command: 'receiveMessage', text: `Your OPENAI_API_KEY is set. Enjoy DevChat!\n${welcomeMessageText}`, hash: '', user: 'system', date: '', isError: false };
+}
\ No newline at end of file
diff --git a/src/handler/messageHandler.ts b/src/handler/messageHandler.ts
index ac42951..6b2f09a 100644
--- a/src/handler/messageHandler.ts
+++ b/src/handler/messageHandler.ts
@@ -5,9 +5,9 @@ import * as vscode from 'vscode';
 import '../command/loadCommands';
 import '../context/loadContexts';
 import { logger } from '../util/logger';
-import { on } from 'events';
-import { isWaitForApiKey, onApiKey } from './historyMessages';
-import { checkOpenaiApiKey } from '../contributes/commands';
+import { isWaitForApiKey } from './historyMessagesBase';
+import { onApiKey } from './historyMessages';
+import { ApiKeyManager } from '../util/apiKey';
 
 
 export class MessageHandler {
@@ -20,6 +20,8 @@ export class MessageHandler {
 		this.handlers[command] = handler;
 	}
 
+	
+
 	async handleMessage(message: any, panel: vscode.WebviewPanel|vscode.WebviewView): Promise<void> {
 		let isNeedSendResponse = false;
 		if (message.command === 'sendMessage') {
@@ -34,7 +36,7 @@ export class MessageHandler {
 			}
 		}
 		if (message.command === 'sendMessage') {
-			if (await isWaitForApiKey() && !await checkOpenaiApiKey()) {
+			if (await isWaitForApiKey() && !await ApiKeyManager.getApiKey()) {
 				onApiKey(message.text, panel);
 				return;
 			}
diff --git a/src/handler/sendMessage.ts b/src/handler/sendMessage.ts
index 1db92c2..8fbfd53 100644
--- a/src/handler/sendMessage.ts
+++ b/src/handler/sendMessage.ts
@@ -1,76 +1,12 @@
 
 import * as vscode from 'vscode';
-import * as fs from 'fs';
-import * as path from 'path';
-import DevChat, { ChatResponse } from '../toolwrapper/devchat';
-import CommandManager from '../command/commandManager';
-import { logger } from '../util/logger';
 import { MessageHandler } from './messageHandler';
-import messageHistory from '../util/messageHistory';
-import CustomCommands from '../command/customCommand';
 import { regInMessage, regOutMessage } from '../util/reg_messages';
-import { TopicManager } from '../topic/topicManager';
+import { stopDevChatBase, sendMessageBase } from './sendMessageBase';
+
 
 let _lastMessage: any = undefined;
 
-
-// Add this function to messageHandler.ts
-function parseMessage(message: string): { context: string[]; instruction: string[]; reference: string[]; text: string } {
-	const contextRegex = /\[context\|(.*?)\]/g;
-	const instructionRegex = /\[instruction\|(.*?)\]/g;
-	const referenceRegex = /\[reference\|(.*?)\]/g;
-
-	const contextPaths = [];
-	const instructionPaths = [];
-	const referencePaths = [];
-
-	let match;
-
-	// 提取 context
-	while ((match = contextRegex.exec(message)) !== null) {
-		contextPaths.push(match[1]);
-	}
-
-	// 提取 instruction
-	while ((match = instructionRegex.exec(message)) !== null) {
-		instructionPaths.push(match[1]);
-	}
-
-	// 提取 reference
-	while ((match = referenceRegex.exec(message)) !== null) {
-		referencePaths.push(match[1]);
-	}
-
-	// 移除标签，保留纯文本
-	const text = message
-		.replace(contextRegex, '')
-		.replace(instructionRegex, '')
-		.replace(referenceRegex, '')
-		.trim();
-
-	return { context: contextPaths, instruction: instructionPaths, reference: referencePaths, text };
-}
-
-function getInstructionFiles(): string[] {
-	const instructionFiles: string[] = [];
-
-	const customCommands = CustomCommands.getInstance().getCommands();
-	// visit customCommands, get default command
-	for (const command of customCommands) {
-		if (command.default) {
-			for (const instruction of command.instructions) {
-				instructionFiles.push(`./.chat/workflows/${command.name}/${instruction}`);
-			}
-		}
-	}
-
-	return instructionFiles;
-}
-
-const devChat = new DevChat();
-let userStop = false;
-
-
 regInMessage({command: 'sendMessage', text: '', hash: undefined});
 regOutMessage({ command: 'receiveMessage', text: 'xxxx', hash: 'xxx', user: 'xxx', date: 'xxx'});
 regOutMessage({ command: 'receiveMessagePartial', text: 'xxxx', user: 'xxx', date: 'xxx'});
@@ -81,72 +17,12 @@ regOutMessage({ command: 'receiveMessagePartial', text: 'xxxx', user: 'xxx', dat
 export async function sendMessage(message: any, panel: vscode.WebviewPanel|vscode.WebviewView): Promise<void> {
 	_lastMessage = message;
 
-	const newText2 = await CommandManager.getInstance().processText(message.text);
-	const parsedMessage = parseMessage(newText2);
-	const chatOptions: any = {};
-
-	let parentHash = undefined;
-	logger.channel()?.info(`request message hash: ${message.hash}`);
-	if (message.hash) {
-		const hmessage = messageHistory.find(message.hash);
-		parentHash = hmessage ? message.parentHash : undefined;
-	} else {
-		const hmessage = messageHistory.findLast();
-		parentHash = hmessage ? hmessage.hash : undefined;
+	const responseMessage = await sendMessageBase(message,  (data: { command: string, text: string, user: string, date: string}) => {
+		MessageHandler.sendMessage(panel, data, false);
+	});
+	if (responseMessage) {
+		MessageHandler.sendMessage(panel, responseMessage);
 	}
-	if (parentHash) {
-		chatOptions.parent = parentHash;
-	}
-	logger.channel()?.info(`parent hash: ${parentHash}`);
-
-	if (parsedMessage.context.length > 0) {
-		chatOptions.context = parsedMessage.context;
-	}
-
-	chatOptions.header = getInstructionFiles();
-	if (parsedMessage.instruction.length > 0) {
-		chatOptions.header = parsedMessage.instruction;
-	}
-
-	if (parsedMessage.reference.length > 0) {
-		chatOptions.reference = parsedMessage.reference;
-	}
-
-	let partialDataText = '';
-	const onData = (partialResponse: ChatResponse) => {
-		const responseText = partialResponse.response.replace(/```\ncommitmsg/g, "```commitmsg");
-		partialDataText = responseText;
-		MessageHandler.sendMessage(panel, { command: 'receiveMessagePartial', text: responseText, user: partialResponse.user, date: partialResponse.date }, false);
-	};
-
-	const chatResponse = await devChat.chat(parsedMessage.text, chatOptions, onData);
-	
-	if (!chatResponse.isError) {
-		messageHistory.add({request: message.text, text: chatResponse.response, parentHash, hash: chatResponse['prompt-hash'], user: chatResponse.user, date: chatResponse.date });
-		
-		let topicId = TopicManager.getInstance().currentTopicId;
-		if (!topicId) {
-			// create new topic
-			const topic = TopicManager.getInstance().createTopic();
-			topicId = topic.topicId;
-		}
-
-		TopicManager.getInstance().updateTopic(topicId!, chatResponse['prompt-hash'], Number(chatResponse.date), message.text, chatResponse.response);
-	}
-
-	let responseText = chatResponse.response.replace(/```\ncommitmsg/g, "```commitmsg");
-	if (userStop) {
-		userStop = false;
-		if (responseText.indexOf('Exit code: undefined') >= 0) {
-			return;
-		}
-	}
-	if (chatResponse.isError) {
-		responseText = partialDataText + responseText;
-	}
-
-	MessageHandler.sendMessage(panel, { command: 'receiveMessage', text: responseText, hash: chatResponse['prompt-hash'], user: chatResponse.user, date: chatResponse.date, isError: chatResponse.isError });
-	return;
 }
 
 // regeneration last message again
@@ -160,9 +36,7 @@ export async function regeneration(message: any, panel: vscode.WebviewPanel|vsco
 
 regInMessage({command: 'stopDevChat'});
 export async function stopDevChat(message: any, panel: vscode.WebviewPanel|vscode.WebviewView): Promise<void> {
-	logger.channel()?.info(`Stopping devchat`);
-	userStop = true;
-	devChat.stop();
+	stopDevChatBase(message);
 }
 
 
diff --git a/src/handler/sendMessageBase.ts b/src/handler/sendMessageBase.ts
new file mode 100644
index 0000000..90fca3d
--- /dev/null
+++ b/src/handler/sendMessageBase.ts
@@ -0,0 +1,160 @@
+import DevChat, { ChatResponse } from '../toolwrapper/devchat';
+import CommandManager from '../command/commandManager';
+import { logger } from '../util/logger';
+import messageHistory from '../util/messageHistory';
+import { TopicManager } from '../topic/topicManager';
+import CustomCommands from '../command/customCommand';
+
+
+// Add this function to messageHandler.ts
+export function parseMessage(message: string): { context: string[]; instruction: string[]; reference: string[]; text: string } {
+	const contextRegex = /\[context\|(.*?)\]/g;
+	const instructionRegex = /\[instruction\|(.*?)\]/g;
+	const referenceRegex = /\[reference\|(.*?)\]/g;
+
+	const contextPaths = [];
+	const instructionPaths = [];
+	const referencePaths = [];
+
+	let match;
+
+	// 提取 context
+	while ((match = contextRegex.exec(message)) !== null) {
+		contextPaths.push(match[1]);
+	}
+
+	// 提取 instruction
+	while ((match = instructionRegex.exec(message)) !== null) {
+		instructionPaths.push(match[1]);
+	}
+
+	// 提取 reference
+	while ((match = referenceRegex.exec(message)) !== null) {
+		referencePaths.push(match[1]);
+	}
+
+	// 移除标签，保留纯文本
+	const text = message
+		.replace(contextRegex, '')
+		.replace(instructionRegex, '')
+		.replace(referenceRegex, '')
+		.trim();
+
+	return { context: contextPaths, instruction: instructionPaths, reference: referencePaths, text };
+}
+
+export function getInstructionFiles(): string[] {
+	const instructionFiles: string[] = [];
+
+	const customCommands = CustomCommands.getInstance().getCommands();
+	// visit customCommands, get default command
+	for (const command of customCommands) {
+		if (command.default) {
+			for (const instruction of command.instructions) {
+				instructionFiles.push(`./.chat/workflows/${command.name}/${instruction}`);
+			}
+		}
+	}
+
+	return instructionFiles;
+}
+
+const devChat = new DevChat();
+let userStop = false;
+
+
+// 将解析消息的部分提取到一个单独的函数中
+export async function parseMessageAndSetOptions(message: any, chatOptions: any): Promise<{ context: string[]; instruction: string[]; reference: string[]; text: string }> {
+	const newText2 = await CommandManager.getInstance().processText(message.text);
+	const parsedMessage = parseMessage(newText2);
+
+	if (parsedMessage.context.length > 0) {
+		chatOptions.context = parsedMessage.context;
+	}
+
+	chatOptions.header = getInstructionFiles();
+	if (parsedMessage.instruction.length > 0) {
+		chatOptions.header = parsedMessage.instruction;
+	}
+
+	if (parsedMessage.reference.length > 0) {
+		chatOptions.reference = parsedMessage.reference;
+	}
+	return parsedMessage;
+}
+
+// 将处理父哈希的部分提取到一个单独的函数中
+export function getParentHash(message: any): string|undefined {
+	let parentHash = undefined;
+	logger.channel()?.info(`request message hash: ${message.hash}`);
+	if (message.hash) {
+		const hmessage = messageHistory.find(message.hash);
+		parentHash = hmessage ? hmessage.parentHash : undefined;
+	} else {
+		const hmessage = messageHistory.findLast();
+		parentHash = hmessage ? hmessage.hash : undefined;
+	}
+	logger.channel()?.info(`parent hash: ${parentHash}`);
+	return parentHash;
+}
+
+export async function handleTopic(parentHash:string, message: any, chatResponse: ChatResponse) {
+	if (!chatResponse.isError) {
+		messageHistory.add({ request: message.text, text: chatResponse.response, parentHash, hash: chatResponse['prompt-hash'], user: chatResponse.user, date: chatResponse.date });
+
+		let topicId = TopicManager.getInstance().currentTopicId;
+		if (!topicId) {
+			// create new topic
+			const topic = TopicManager.getInstance().createTopic();
+			topicId = topic.topicId;
+		}
+
+		TopicManager.getInstance().updateTopic(topicId!, chatResponse['prompt-hash'], Number(chatResponse.date), message.text, chatResponse.response);
+	}
+}
+
+export async function handlerResponseText(partialDataText: string, chatResponse: ChatResponse) : Promise<string|undefined> {
+	let responseText = chatResponse.response.replace(/```\ncommitmsg/g, "```commitmsg");
+	if (userStop) {
+		userStop = false;
+		if (responseText == '' && chatResponse.isError) {
+			return undefined;
+		}
+	}
+	if (chatResponse.isError) {
+		responseText = partialDataText + '\n\n' + responseText;
+	}
+	return responseText;
+}
+
+// 重构后的sendMessage函数
+export async function sendMessageBase(message: any, handlePartialData: (data: { command: string, text: string, user: string, date: string}) => void): Promise<{ command: string, text: string, hash: string, user: string, date: string, isError: boolean }|undefined> {
+	const chatOptions: any = {};
+	const parsedMessage = await parseMessageAndSetOptions(message, chatOptions);
+
+	const parentHash = getParentHash(message);
+	if (parentHash) {
+		chatOptions.parent = parentHash;
+	}
+
+	let partialDataText = '';
+	const onData = (partialResponse: ChatResponse) => {
+		partialDataText = partialResponse.response.replace(/```\ncommitmsg/g, "```commitmsg");
+		handlePartialData({ command: 'receiveMessagePartial', text: partialDataText!, user: partialResponse.user, date: partialResponse.date });
+	};
+
+	const chatResponse = await devChat.chat(parsedMessage.text, chatOptions, onData);
+	await handleTopic(parentHash!, message, chatResponse);
+	const responseText = await handlerResponseText(partialDataText, chatResponse);
+	if (responseText === undefined) {
+		return;
+	}
+	
+	return { command: 'receiveMessage', text: responseText, hash: chatResponse['prompt-hash'], user: chatResponse.user, date: chatResponse.date, isError: chatResponse.isError };
+}
+
+export async function stopDevChatBase(message: any): Promise<void> {
+	logger.channel()?.info(`Stopping devchat`);
+	userStop = true;
+	devChat.stop();
+}
\ No newline at end of file
diff --git a/src/handler/showDiff.ts b/src/handler/showDiff.ts
index 84ce537..9fcb2c5 100644
--- a/src/handler/showDiff.ts
+++ b/src/handler/showDiff.ts
@@ -8,6 +8,7 @@ import { regInMessage, regOutMessage } from '../util/reg_messages';
 import { applyCodeChanges, isValidActionString } from '../util/appyDiff';
 import { logger } from '../util/logger';
 import { FilePairManager } from '../util/diffFilePairs';
+import { UiUtilWrapper } from '../util/uiUtil';
 
 
 
@@ -64,7 +65,7 @@ export async function diffView(code: string, tarFile: string) {
 	const tempFile = path.join(tempDir, fileName);
 
 	// save code to temp file
-	await vscode.workspace.fs.writeFile(vscode.Uri.file(tempFile), Buffer.from(code));
+	await UiUtilWrapper.writeFile(tempFile, code);
 
 	// open diff view
 	FilePairManager.getInstance().addFilePair(curFile, tempFile);
diff --git a/src/init/chatConfig.ts b/src/init/chatConfig.ts
index 3681ce2..ba281c1 100644
--- a/src/init/chatConfig.ts
+++ b/src/init/chatConfig.ts
@@ -1,9 +1,9 @@
 import * as vscode from 'vscode';
 import * as fs from 'fs';
 import * as path from 'path';
-import * as ncp from 'ncp';
 
 import { logger } from '../util/logger';
+import { UiUtilWrapper } from '../util/uiUtil';
 
 
 function copyFileSync(source: string, target: string) {
@@ -32,13 +32,11 @@ function copyFileSync(source: string, target: string) {
   }
 
 export function createChatDirectoryAndCopyInstructionsSync(extensionUri: vscode.Uri) {
-  
-    const workspaceFolders = vscode.workspace.workspaceFolders;
-    if (!workspaceFolders) {
+  	const workspaceRoot = UiUtilWrapper.workspaceFoldersFirstPath();
+    if (!workspaceRoot) {
       return;
     }
   
-    const workspaceRoot = workspaceFolders[0].uri.fsPath;
     const chatWorkflowsDirPath = path.join(workspaceRoot, '.chat', 'workflows');
     const instructionsSrcPath = path.join(extensionUri.fsPath, 'workflows');
   
diff --git a/src/panel/chatPanel.ts b/src/panel/chatPanel.ts
index b1325c3..6271587 100644
--- a/src/panel/chatPanel.ts
+++ b/src/panel/chatPanel.ts
@@ -9,6 +9,7 @@ import WebviewManager from './webviewManager';
 import CustomCommands from '../command/customCommand';
 import CommandManager from '../command/commandManager';
 import { createChatDirectoryAndCopyInstructionsSync } from '../init/chatConfig';
+import { UiUtilWrapper } from '../util/uiUtil';
 
 export default class ChatPanel {
 	private static _instance: ChatPanel | undefined;
@@ -20,7 +21,7 @@ export default class ChatPanel {
 		// 创建 .chat 目录并复制 workflows
 		createChatDirectoryAndCopyInstructionsSync(extensionUri);
 
-		const workspaceDir = vscode.workspace.workspaceFolders?.[0].uri.fsPath;
+		const workspaceDir = UiUtilWrapper.workspaceFoldersFirstPath();
 		if (workspaceDir) {
 			const workflowsDir = path.join(workspaceDir!, '.chat', 'workflows');
 			CustomCommands.getInstance().parseCommands(workflowsDir);
diff --git a/src/panel/devchatView.ts b/src/panel/devchatView.ts
index 44b58a1..5ce44da 100644
--- a/src/panel/devchatView.ts
+++ b/src/panel/devchatView.ts
@@ -8,6 +8,7 @@ import { createChatDirectoryAndCopyInstructionsSync } from '../init/chatConfig';
 import ExtensionContextHolder from '../util/extensionContext';
 import CustomCommands from '../command/customCommand';
 import { TopicManager } from '../topic/topicManager';
+import { UiUtilWrapper } from '../util/uiUtil';
 
 
 export class DevChatViewProvider implements vscode.WebviewViewProvider {
@@ -27,7 +28,7 @@ export class DevChatViewProvider implements vscode.WebviewViewProvider {
 		// 创建 .chat 目录并复制 workflows
 		createChatDirectoryAndCopyInstructionsSync(ExtensionContextHolder.context?.extensionUri!);
 
-		const workspaceDir = vscode.workspace.workspaceFolders?.[0].uri.fsPath;
+		const workspaceDir = UiUtilWrapper.workspaceFoldersFirstPath();
 		if (workspaceDir) {
 			const workflowsDir = path.join(workspaceDir!, '.chat', 'workflows');
 			CustomCommands.getInstance().parseCommands(workflowsDir);
diff --git a/src/panel/statusBarView.ts b/src/panel/statusBarView.ts
new file mode 100644
index 0000000..ffa7a6d
--- /dev/null
+++ b/src/panel/statusBarView.ts
@@ -0,0 +1,42 @@
+import * as vscode from 'vscode';
+
+import { dependencyCheck } from './statusBarViewBase';
+
+
+export function createStatusBarItem(context: vscode.ExtensionContext): vscode.StatusBarItem {
+    const statusBarItem = vscode.window.createStatusBarItem(vscode.StatusBarAlignment.Right, 100);
+
+    // Set the status bar item properties
+    statusBarItem.text = `$(warning)DevChat`;
+    statusBarItem.tooltip = 'DevChat checking ..., please wait.';
+    statusBarItem.command = '';
+
+    // add a timer to update the status bar item
+	setInterval(async () => {
+		const [devchatStatus, apiKeyStatus] = await dependencyCheck();
+		if (devchatStatus !== 'ready') {
+			statusBarItem.text = `$(warning)DevChat`;
+			statusBarItem.tooltip = `${devchatStatus}`;
+			statusBarItem.command = undefined;
+			// set statusBarItem warning color
+			return;
+		}
+
+		if (apiKeyStatus !== 'ready') {
+			statusBarItem.text = `$(warning)DevChat`;
+			statusBarItem.tooltip = `${apiKeyStatus}`;
+			statusBarItem.command = 'DevChat.OPENAI_API_KEY';
+			return;
+		}
+
+		statusBarItem.text = `$(pass)DevChat`;
+		statusBarItem.tooltip = `ready to chat`;
+		statusBarItem.command = 'devcaht.onStatusBarClick';
+	}, 3000);
+
+	// Add the status bar item to the status bar
+	statusBarItem.show();
+
+	context.subscriptions.push(statusBarItem);
+    return statusBarItem;
+}
\ No newline at end of file
diff --git a/src/panel/statusBarViewBase.ts b/src/panel/statusBarViewBase.ts
new file mode 100644
index 0000000..cd99598
--- /dev/null
+++ b/src/panel/statusBarViewBase.ts
@@ -0,0 +1,81 @@
+import * as fs from 'fs';
+import * as path from 'path';
+import { logger } from "../util/logger";
+
+import { UiUtilWrapper } from "../util/uiUtil";
+import { TopicManager } from "../topic/topicManager";
+import { checkDevChatDependency } from "../contributes/commandsBase";
+import { ApiKeyManager } from '../util/apiKey';
+
+
+
+function getExtensionVersion(): string {
+	const packageJsonPath = path.join(UiUtilWrapper.extensionPath(), 'package.json');
+	const packageJsonContent = fs.readFileSync(packageJsonPath, 'utf8');
+	const packageJson = JSON.parse(packageJsonContent);
+
+	return packageJson.version;
+}
+
+let devchatStatus = '';
+let apiKeyStatus = '';
+let isVersionChangeCompare: boolean|undefined = undefined;
+export async function dependencyCheck(): Promise<[string, string]> {
+	let versionChanged = false;
+	if (isVersionChangeCompare === undefined) {
+		const versionOld = await UiUtilWrapper.secretStorageGet("DevChatVersionOld");
+		const versionNew = getExtensionVersion();
+		const versionChanged = versionOld !== versionNew;
+		UiUtilWrapper.storeSecret("DevChatVersionOld", versionNew!);
+
+		isVersionChangeCompare = true;
+		logger.channel()?.info(`versionOld: ${versionOld}, versionNew: ${versionNew}, versionChanged: ${versionChanged}`);
+	}
+	
+	
+	// status item has three status type
+	// 1. not in a folder
+	// 2. dependence is invalid
+	// 3. ready
+	if (devchatStatus === '' || devchatStatus === 'waiting install devchat') {
+		let bOk = true;
+		let devChat: string | undefined = UiUtilWrapper.getConfiguration('DevChat', 'DevChatPath');
+		if (!devChat) {
+			bOk = false;
+		}
+
+		if (!bOk) {
+			bOk = checkDevChatDependency();
+		}
+		if (bOk && versionChanged) {
+			bOk = false;
+		}
+
+		if (bOk) {
+			devchatStatus = 'ready';
+			TopicManager.getInstance().loadTopics();
+		} else {
+			if (devchatStatus === '') {
+				devchatStatus = 'not ready';
+			}
+		}
+	}
+	if (devchatStatus === 'not ready') {
+		// auto install devchat
+		UiUtilWrapper.runTerminal('DevChat Install', `python ${UiUtilWrapper.extensionPath() + "/tools/install.py"}`);
+		devchatStatus = 'waiting install devchat';
+		isVersionChangeCompare = true;
+	}
+
+	// check api key
+	if (apiKeyStatus === '' || apiKeyStatus === 'please set api key') {
+		const bOk = await ApiKeyManager.getApiKey();
+		if (bOk) {
+			apiKeyStatus = 'ready';
+		} else {
+			apiKeyStatus = 'please set api key';
+		}
+	}
+
+	return [devchatStatus, apiKeyStatus];
+}
\ No newline at end of file
diff --git a/src/panel/topicView.ts b/src/panel/topicView.ts
new file mode 100644
index 0000000..a07555a
--- /dev/null
+++ b/src/panel/topicView.ts
@@ -0,0 +1,129 @@
+import * as vscode from 'vscode';
+
+import { TopicManager, Topic } from '../topic/topicManager';
+
+
+export class TopicTreeItem extends vscode.TreeItem {
+    id: string;
+    date: number | undefined;
+    constructor(label: string, id: string, date: number | undefined, collapsibleState: vscode.TreeItemCollapsibleState) {
+        super(label, collapsibleState);
+        this.id = id;
+        this.date = date;
+        this.iconPath = new vscode.ThemeIcon('symbol-variable');
+        this.contextValue = 'yourTreeItem';
+    }
+	uncheck() {
+		this.iconPath = new vscode.ThemeIcon('symbol-variable');
+	}
+	check() {
+		this.iconPath = new vscode.ThemeIcon('check');
+	}
+}
+
+export class TopicTreeDataProvider implements vscode.TreeDataProvider<TopicTreeItem> {
+    private static instance: TopicTreeDataProvider;
+
+    public static getInstance(): TopicTreeDataProvider {
+        if (!TopicTreeDataProvider.instance) {
+            TopicTreeDataProvider.instance = new TopicTreeDataProvider();
+        }
+        return TopicTreeDataProvider.instance;
+    }
+
+    private _onDidChangeTreeData: vscode.EventEmitter<TopicTreeItem | undefined | null | void> = new vscode.EventEmitter<TopicTreeItem | undefined | null | void>();
+    readonly onDidChangeTreeData: vscode.Event<TopicTreeItem | undefined | null | void> = this._onDidChangeTreeData.event;
+
+    public selectedItem: TopicTreeItem | null = null;
+    private items: TopicTreeItem[] = [];
+
+    // reg listeners to TopicManager in constructor
+    private constructor() {
+        TopicManager.getInstance().addOnCreateTopicListener(this.addItem.bind(this));
+        TopicManager.getInstance().addOnDeleteTopicListener(this.onDeleteTopic.bind(this));
+        TopicManager.getInstance().addOnReloadTopicsListener(this.onReloadTopics.bind(this));
+        TopicManager.getInstance().addOnUpdateTopicListener(this.onUpdateTopics.bind(this));
+    }
+
+    // sort items
+    private sortItems() {
+        this.items.sort((a, b) => {
+            if (a.date && b.date) {
+                return b.date - a.date;
+            } else if (!a.date) {
+                return -1;
+            } else if (!b.date) {
+                return 1;
+            } else {
+                return 0;
+            }
+        });
+    }
+
+    onUpdateTopics(topicId: string) {
+        const items = this.items.filter(i => i.id === topicId);
+        const topic = TopicManager.getInstance().getTopic(topicId);
+        items.map((item) => {
+            item.label = topic?.name;
+            item.date = topic?.lastUpdated;
+        });
+        this.sortItems();
+        this._onDidChangeTreeData.fire();
+    }
+
+    onReloadTopics(topics: Topic[]) {
+        const items = topics.map((topic) => {
+            return new TopicTreeItem(topic.name ? topic.name : "new topic", topic.topicId, topic.lastUpdated, vscode.TreeItemCollapsibleState.None);
+        });
+        this.items = items;
+        this.sortItems();
+        this._onDidChangeTreeData.fire();
+    }
+
+    onDeleteTopic(topicId: string) {
+        this.items = this.items.filter(i => i.id !== topicId);
+        this.sortItems();
+        this._onDidChangeTreeData.fire();
+    }
+
+    setSelectedItem(item: TopicTreeItem): void {
+		this.items.map((item) => {
+			item.uncheck();
+		});
+		item.check();
+        this.selectedItem = item;
+		this._onDidChangeTreeData.fire();
+    }
+
+    getChildren(element?: TopicTreeItem): vscode.ProviderResult<TopicTreeItem[]> {
+        return this.items;
+    }
+
+    getTreeItem(element: TopicTreeItem): vscode.TreeItem | Thenable<vscode.TreeItem> {
+        element.command = {
+            title: 'Select Item',
+            command: 'devchat-topicview.selectTopic',
+            arguments: [element],
+        };
+        return element;
+    }
+
+    reload(): void {
+        const topicList = TopicManager.getInstance().getTopicList();
+        this.onReloadTopics(topicList);
+    }
+
+    addItem(topic: Topic): void {
+        const newItem = new TopicTreeItem(topic.name ? topic.name : "new topic", topic.topicId, topic.lastUpdated, vscode.TreeItemCollapsibleState.None);
+        this.items.push(newItem);
+        this.sortItems();
+        this._onDidChangeTreeData.fire();
+    }
+
+	
+    deleteItem(item: TopicTreeItem): void {
+        this.items = this.items.filter(i => i !== item);
+        this.sortItems();
+        this._onDidChangeTreeData.fire();
+    }
+}
\ No newline at end of file
diff --git a/src/toolwrapper/devchat.ts b/src/toolwrapper/devchat.ts
index aca9dd6..f458f6b 100644
--- a/src/toolwrapper/devchat.ts
+++ b/src/toolwrapper/devchat.ts
@@ -1,5 +1,4 @@
 // devchat.ts
-import * as vscode from 'vscode';
 import * as dotenv from 'dotenv';
 import * as path from 'path';
 import * as fs from 'fs';
@@ -7,6 +6,8 @@ import * as fs from 'fs';
 import { logger } from '../util/logger';
 import { CommandRun } from "../util/commonUtil";
 import ExtensionContextHolder from '../util/extensionContext';
+import { UiUtilWrapper } from '../util/uiUtil';
+import { ApiKeyManager } from '../util/apiKey';
 
 
 
@@ -84,18 +85,6 @@ class DevChat {
 		return args;
 	}
 
-	async getOpenaiApiKey(): Promise<string | undefined> {
-		const secretStorage: vscode.SecretStorage = ExtensionContextHolder.context!.secrets;
-		let openaiApiKey = await secretStorage.get("devchat_OPENAI_API_KEY");
-		if (!openaiApiKey) {
-			openaiApiKey = vscode.workspace.getConfiguration('DevChat').get('API_KEY');
-		}
-		if (!openaiApiKey) {
-			openaiApiKey = process.env.OPENAI_API_KEY;
-		}
-		return openaiApiKey;
-	}
-
 	private parseOutData(stdout: string, isPartial: boolean): ChatResponse {
 		const responseLines = stdout.trim().split("\n");
 
@@ -148,15 +137,7 @@ class DevChat {
 	}
 
 	apiEndpoint(apiKey: string | undefined): any {
-		let openAiApiBase: string | undefined = undefined;
-		if (apiKey?.startsWith("DC.")) {
-			// TODO add devchat proxy
-			openAiApiBase = "https://xw4ymuy6qj.ap-southeast-1.awsapprunner.com/api/v1";
-		}
-
-		if (vscode.workspace.getConfiguration('DevChat').get('API_ENDPOINT')) {
-			openAiApiBase = vscode.workspace.getConfiguration('DevChat').get('API_ENDPOINT');
-		}
+		const openAiApiBase = ApiKeyManager.getEndPoint(apiKey);
 
 		const openAiApiBaseObject = openAiApiBase ? { OPENAI_API_BASE: openAiApiBase } : {};
 		return openAiApiBaseObject;
@@ -166,8 +147,8 @@ class DevChat {
 		const args = await this.buildArgs(options);
 		args.push(content);
 
-		const workspaceDir = vscode.workspace.workspaceFolders?.[0].uri.fsPath;
-		let openaiApiKey = await this.getOpenaiApiKey();
+		const workspaceDir = UiUtilWrapper.workspaceFoldersFirstPath();
+		let openaiApiKey = await ApiKeyManager.getApiKey();
 		if (!openaiApiKey) {
 			logger.channel()?.error('OpenAI key is invalid!');
 			logger.channel()?.show();
@@ -177,13 +158,13 @@ class DevChat {
 		// 如果配置了devchat的TOKEN，那么就需要使用默认的代理
 		let openAiApiBaseObject = this.apiEndpoint(openaiApiKey);
 
-		const openaiModel = vscode.workspace.getConfiguration('DevChat').get('OpenAI.model');
-		const openaiTemperature = vscode.workspace.getConfiguration('DevChat').get('OpenAI.temperature');
-		const openaiStream = vscode.workspace.getConfiguration('DevChat').get('OpenAI.stream');
-		const llmModel = vscode.workspace.getConfiguration('DevChat').get('llmModel');
-		const tokensPerPrompt = vscode.workspace.getConfiguration('DevChat').get('OpenAI.tokensPerPrompt');
+		const openaiModel = UiUtilWrapper.getConfiguration('DevChat', 'OpenAI.model');
+		const openaiTemperature = UiUtilWrapper.getConfiguration('DevChat', 'OpenAI.temperature');
+		const openaiStream = UiUtilWrapper.getConfiguration('DevChat', 'OpenAI.stream');
+		const llmModel = UiUtilWrapper.getConfiguration('DevChat', 'llmModel');
+		const tokensPerPrompt = UiUtilWrapper.getConfiguration('DevChat', 'OpenAI.tokensPerPrompt');
 
-		let devChat: string | undefined = vscode.workspace.getConfiguration('DevChat').get('DevChatPath');
+		let devChat: string | undefined = UiUtilWrapper.getConfiguration('DevChat', 'DevChatPath');
 		if (!devChat) {
 			devChat = 'devchat';
 		}
@@ -227,12 +208,11 @@ class DevChat {
 			const { exitCode: code, stdout, stderr } = await this.commandRun.spawnAsync(devChat, args, spawnAsyncOptions, onStdoutPartial, undefined, undefined, undefined);
 
 			if (stderr) {
-				const errorMessage = stderr.trim().match(/Error：(.+)/)?.[1];
 				return {
 					"prompt-hash": "",
 					user: "",
 					date: "",
-					response: errorMessage ? `Error: ${errorMessage}` : "Unknown error",
+					response: stderr,
 					isError: true,
 				};
 			}
@@ -253,7 +233,7 @@ class DevChat {
 	async log(options: LogOptions = {}): Promise<LogEntry[]> {
 		const args = this.buildLogArgs(options);
 		const devChat = this.getDevChatPath();
-		const workspaceDir = vscode.workspace.workspaceFolders?.[0].uri.fsPath;
+		const workspaceDir = UiUtilWrapper.workspaceFoldersFirstPath();
 		const openaiApiKey = process.env.OPENAI_API_KEY;
 
 		logger.channel()?.info(`Running devchat with args: ${args.join(" ")}`);
@@ -286,7 +266,7 @@ class DevChat {
 		if (options.maxCount) {
 			args.push('--max-count', `${options.maxCount}`);
 		} else {
-			const maxLogCount = vscode.workspace.getConfiguration('DevChat').get('maxLogCount');
+			const maxLogCount = UiUtilWrapper.getConfiguration('DevChat', 'maxLogCount');
 			args.push('--max-count', `${maxLogCount}`);
 		}
 
@@ -294,7 +274,7 @@ class DevChat {
 	}
 
 	private getDevChatPath(): string {
-		let devChat: string | undefined = vscode.workspace.getConfiguration('DevChat').get('DevChatPath');
+		let devChat: string | undefined = UiUtilWrapper.getConfiguration('DevChat', 'DevChatPath');
 		if (!devChat) {
 			devChat = 'devchat';
 		}
diff --git a/src/toolwrapper/dtm.ts b/src/toolwrapper/dtm.ts
index b266acc..6d0a277 100644
--- a/src/toolwrapper/dtm.ts
+++ b/src/toolwrapper/dtm.ts
@@ -1,10 +1,10 @@
 import { spawn } from "child_process";
-import * as vscode from 'vscode';
 import * as path from 'path';
 import * as fs from 'fs';
 
 import { logger } from "../util/logger";
 import { CommandRun } from "../util/commonUtil";
+import { UiUtilWrapper  } from "../util/uiUtil";
 
 interface DtmResponse {
 	status: number;
@@ -17,7 +17,7 @@ class DtmWrapper {
 	private commandRun: CommandRun;
 
 	constructor() {
-		this.workspaceDir = vscode.workspace.workspaceFolders?.[0].uri.fsPath || '.';
+		this.workspaceDir = UiUtilWrapper.workspaceFoldersFirstPath() || '.';
 		this.commandRun = new CommandRun();
 	}
 
diff --git a/src/topic/topicManager.ts b/src/topic/topicManager.ts
index e400194..22bf6a8 100644
--- a/src/topic/topicManager.ts
+++ b/src/topic/topicManager.ts
@@ -1,11 +1,11 @@
 import { v4 as uuidv4 } from 'uuid';
-import * as vscode from 'vscode';
 import * as path from 'path';
 import * as fs from 'fs';
 
 import DevChat, { LogEntry, LogOptions } from '../toolwrapper/devchat';
 
 import { loadTopicList } from './loadTopics';
+import { UiUtilWrapper } from '../util/uiUtil';
 
 export class Topic {
 	name: string | undefined;
@@ -194,7 +194,7 @@ export class TopicManager {
 
 		if (topic.firstMessageHash) {
 			// get ${WORKSPACE_ROOT}/.chat/.deletedTopics
-			const workspaceDir = vscode.workspace.workspaceFolders?.[0].uri.fsPath;
+			const workspaceDir = UiUtilWrapper.workspaceFoldersFirstPath();
 			const deletedTopicsPath = path.join(workspaceDir!, '.chat', '.deletedTopics');
 
 			// read ${WORKSPACE_ROOT}/.chat/.deletedTopics as String[]
@@ -218,7 +218,7 @@ export class TopicManager {
 	}
 
 	isDeleteTopic(topicId: string) {
-		const workspaceDir = vscode.workspace.workspaceFolders?.[0].uri.fsPath;
+		const workspaceDir = UiUtilWrapper.workspaceFoldersFirstPath();
 		const deletedTopicsPath = path.join(workspaceDir!, '.chat', '.deletedTopics');
 
 		if (!fs.existsSync(deletedTopicsPath)) {
diff --git a/src/util/apiKey.ts b/src/util/apiKey.ts
new file mode 100644
index 0000000..7f4be65
--- /dev/null
+++ b/src/util/apiKey.ts
@@ -0,0 +1,41 @@
+// src/apiKey.ts
+
+import { UiUtilWrapper } from './uiUtil';
+
+export class ApiKeyManager {
+	static async getApiKey(): Promise<string | undefined> {
+		let apiKey = await UiUtilWrapper.secretStorageGet("devchat_OPENAI_API_KEY");
+		if (!apiKey) {
+			apiKey = UiUtilWrapper.getConfiguration('DevChat', 'API_KEY');
+		}
+		if (!apiKey) {
+			apiKey = process.env.OPENAI_API_KEY;
+		}
+		return apiKey;
+	}
+
+	static getKeyType(apiKey: string): string | undefined {
+		if (apiKey.startsWith("sk.")) {
+			return "sk";
+		} else if (apiKey.startsWith("DC.")) {
+			return "DC";
+		} else {
+			return undefined;
+		}
+	}
+
+	static async writeApiKeySecret(apiKey: string): Promise<void> {
+		await UiUtilWrapper.storeSecret("devchat_OPENAI_API_KEY", apiKey);
+	}
+
+	static getEndPoint(apiKey: string | undefined): string | undefined {
+		let endPoint = UiUtilWrapper.getConfiguration('DevChat', 'API_ENDPOINT');
+		if (!endPoint) {
+			endPoint = process.env.OPENAI_API_BASE;
+		}
+		if (!endPoint && apiKey?.startsWith("DC.")) {
+			endPoint = "https://xw4ymuy6qj.ap-southeast-1.awsapprunner.com/api/v1";
+		}
+		return endPoint;
+	}
+}
\ No newline at end of file
diff --git a/src/util/appyDiff.ts b/src/util/appyDiff.ts
index 02bc9e6..e2c01ba 100644
--- a/src/util/appyDiff.ts
+++ b/src/util/appyDiff.ts
@@ -19,9 +19,10 @@ function findMatchingIndex(list1: string[], list2: string[]): number[] {
 		let isMatch = true;
 		for (let j = 0; j < list2.length; j++) {
 			if (list1[i + j].trim() !== list2[j].trim()) {
-				if (j > 0) {
+
+				//if (j > 0) {
 					logger.channel()?.info(`findMatchingIndex end at ${j} ${list1[i + j].trim()} != ${list2[j].trim()}`);
-				}
+				//}
 
 				isMatch = false;
 				break;
diff --git a/src/util/commonUtil.ts b/src/util/commonUtil.ts
index 7655d8a..d6285a3 100644
--- a/src/util/commonUtil.ts
+++ b/src/util/commonUtil.ts
@@ -1,11 +1,13 @@
 import * as fs from 'fs';
 import * as os from 'os';
 import * as path from 'path';
-import * as vscode from 'vscode';
+import * as childProcess from 'child_process';
+
 import { parseArgsStringToArgv } from 'string-argv';
 
 import { logger } from './logger';
 import { spawn, exec } from 'child_process';
+import { UiUtilWrapper } from './uiUtil';
 
 export function createTempSubdirectory(subdir: string): string {
 	// 获取系统临时目录
@@ -77,7 +79,7 @@ export class CommandRun {
 				if (code === 0) {
 					resolve({ exitCode: code, stdout, stderr });
 				} else {
-					reject({ exitCode: code, stdout, stderr });
+					resolve({ exitCode: code, stdout, stderr });
 				}
 			});
 
@@ -90,7 +92,7 @@ export class CommandRun {
 					logger.channel()?.error(`Error occurred: ${error.message}`);
 					logger.channel()?.show();
 				}
-				reject({ exitCode: error.code, stdout: "", stderr: error.message });
+				resolve({ exitCode: error.code, stdout: "", stderr: error.message });
 			});
 		});
 	};
@@ -110,7 +112,7 @@ export async function runCommandAndWriteOutput(
 ): Promise<CommandResult> {
 	const run = new CommandRun();
 	const options = {
-		cwd: vscode.workspace.workspaceFolders?.[0].uri.fsPath || '.',
+		cwd: UiUtilWrapper.workspaceFoldersFirstPath() || '.',
 	};
 
 	return run.spawnAsync(command, args, options, undefined, undefined, undefined, outputFile);
@@ -122,7 +124,7 @@ export async function runCommandStringAndWriteOutput(
 ): Promise<CommandResult> {
     const run = new CommandRun();
     const options = {
-        cwd: vscode.workspace.workspaceFolders?.[0].uri.fsPath || '.'
+        cwd: UiUtilWrapper.workspaceFoldersFirstPath() || '.'
     };
 
     // Split the commandString into command and args array using string-argv
@@ -143,13 +145,14 @@ export async function runCommandStringAndWriteOutput(
 
 export async function getLanguageIdByFileName(fileName: string): Promise<string | undefined> {
 	try {
-		// 打开指定的文件
-		const document = await vscode.workspace.openTextDocument(fileName);
-		// 获取文件的语言标识符
-		const languageId = document.languageId;
+		const languageId = await UiUtilWrapper.languageId(fileName);
 		return languageId;
 	} catch (error) {
 		// 如果无法打开文件或发生其他错误，返回undefined
 		return undefined;
 	}
+}
+
+export function runCommand(command: string): string {
+	return childProcess.execSync(command).toString();
 }
\ No newline at end of file
diff --git a/src/util/logger.ts b/src/util/logger.ts
index 3530271..b8027c1 100644
--- a/src/util/logger.ts
+++ b/src/util/logger.ts
@@ -1,12 +1,19 @@
-import * as vscode from 'vscode'
+
+export interface LogChannel {
+	info(message: string, ...args: any[]): void;
+	warn(message: string, ...args: any[]): void;
+	error(message: string | Error, ...args: any[]): void;
+	debug(message: string, ...args: any[]): void;
+	show(): void;
+}
 
 export class logger {
-	private static _channel: vscode.LogOutputChannel | undefined;
-	public static init(context: vscode.ExtensionContext): void {
-		this._channel = vscode.window.createOutputChannel('DevChat', { log: true });
+	private static _channel: LogChannel | undefined;
+	public static init(channel: LogChannel): void {
+		this._channel = channel;
 	}
 
-	public static channel(): vscode.LogOutputChannel | undefined {
+	public static channel(): LogChannel | undefined {
 		return this._channel;
 	}
 }
diff --git a/src/util/logger_vscode.ts b/src/util/logger_vscode.ts
new file mode 100644
index 0000000..caca8f9
--- /dev/null
+++ b/src/util/logger_vscode.ts
@@ -0,0 +1,39 @@
+import { LogChannel } from "./logger";
+import * as vscode from 'vscode';
+
+export class LoggerChannelVscode implements LogChannel {
+  _channel: vscode.LogOutputChannel;
+
+  private static _instance: LoggerChannelVscode;
+
+  private constructor() {
+    this._channel = vscode.window.createOutputChannel('DevChat', { log: true });
+  }
+
+  public static getInstance(): LoggerChannelVscode {
+    if (!this._instance) {
+      this._instance = new LoggerChannelVscode();
+    }
+    return this._instance;
+  }
+
+  info(message: string, ...args: any[]): void {
+    this._channel.info(message, ...args);
+  }
+
+  warn(message: string, ...args: any[]): void {
+    this._channel.warn(message, ...args);
+  }
+
+  error(message: string | Error, ...args: any[]): void {
+    this._channel.error(message, ...args);
+  }
+
+  debug(message: string, ...args: any[]): void {
+    this._channel.debug(message, ...args);
+  }
+
+  show(): void {
+    this._channel.show();
+  }
+}
\ No newline at end of file
diff --git a/src/util/messageHistory.ts b/src/util/messageHistory.ts
index 2f9fa07..6bd0d08 100644
--- a/src/util/messageHistory.ts
+++ b/src/util/messageHistory.ts
@@ -1,6 +1,5 @@
-import * as vscode from 'vscode';
 
-class MessageHistory {
+export class MessageHistory {
 	private history: any[];
 	private lastmessage: any | null;
 
@@ -21,10 +20,6 @@ class MessageHistory {
 		return this.lastmessage;
 	}
 
-	remove() {
-		return;
-	}
-
 	clear() {
 		this.history = [];
 		this.lastmessage = null;
diff --git a/src/util/uiUtil.ts b/src/util/uiUtil.ts
new file mode 100644
index 0000000..12e1a7a
--- /dev/null
+++ b/src/util/uiUtil.ts
@@ -0,0 +1,48 @@
+
+export interface UiUtil {
+	languageId(uri: string): Promise<string>;
+	workspaceFoldersFirstPath(): string | undefined;
+	getConfiguration(key1: string, key2: string): string | undefined;
+	secretStorageGet(key: string): Promise<string | undefined>;
+	writeFile(uri: string, content: string): Promise<void>;
+	showInputBox(option: object): Promise<string | undefined>;
+	storeSecret(key: string, value: string): Promise<void>;
+	extensionPath(): string;
+	runTerminal(terminalName:string, command: string): void;
+}
+
+export class UiUtilWrapper {
+	private static _uiUtil: UiUtil | undefined;
+	public static init(uiUtil: UiUtil): void {
+		this._uiUtil = uiUtil;
+	}
+
+	public static async languageId(uri: string): Promise<string | undefined> {
+		return await this._uiUtil?.languageId(uri);
+	}
+	public static workspaceFoldersFirstPath(): string | undefined {
+		return this._uiUtil?.workspaceFoldersFirstPath();
+	}
+	public static getConfiguration(key1: string, key2: string): string | undefined {
+		return this._uiUtil?.getConfiguration(key1, key2);
+	}
+	public static async secretStorageGet(key: string): Promise<string | undefined> {
+		return await this._uiUtil?.secretStorageGet(key);
+	}
+	public static async writeFile(uri: string, content: string): Promise<void> {
+		return await this._uiUtil?.writeFile(uri, content);
+	}
+	public static async showInputBox(option: object): Promise<string | undefined> {
+		return await this._uiUtil?.showInputBox(option);
+	}
+	public static async storeSecret(key: string, value: string): Promise<void> {
+		return await this._uiUtil?.storeSecret(key, value);
+	}
+	public static extensionPath(): string {
+		return this._uiUtil?.extensionPath()!;
+	}
+	public static runTerminal(terminalName: string, command: string): void {
+		this._uiUtil?.runTerminal(terminalName, command);
+	}
+}
+
diff --git a/src/util/uiUtil_vscode.ts b/src/util/uiUtil_vscode.ts
new file mode 100644
index 0000000..2d4b453
--- /dev/null
+++ b/src/util/uiUtil_vscode.ts
@@ -0,0 +1,42 @@
+import * as vscode from 'vscode';
+
+import ExtensionContextHolder from './extensionContext';
+import { UiUtil } from './uiUtil';
+
+
+export class UiUtilVscode implements UiUtil {
+	public async languageId(uri: string): Promise<string> {
+		const document = await vscode.workspace.openTextDocument(uri);
+		return document.languageId;
+	}
+	public workspaceFoldersFirstPath(): string | undefined {
+		return vscode.workspace.workspaceFolders?.[0].uri.fsPath;
+	}
+
+	public getConfiguration(key1: string, key2: string): string | undefined {
+		return vscode.workspace.getConfiguration(key1).get(key2);
+	}
+	public async secretStorageGet(key: string): Promise<string | undefined> {
+		const secretStorage: vscode.SecretStorage = ExtensionContextHolder.context!.secrets;
+		let openaiApiKey = await secretStorage.get(key);
+		return openaiApiKey;
+	}
+	public async writeFile(uri: string, content: string): Promise<void> {
+		await vscode.workspace.fs.writeFile(vscode.Uri.file(uri), Buffer.from(content));
+	}
+	public async showInputBox(option: object): Promise<string | undefined> {
+		return vscode.window.showInputBox(option);		
+	}
+	public async storeSecret(key: string, value: string): Promise<void> {
+		const secretStorage: vscode.SecretStorage = ExtensionContextHolder.context!.secrets;
+		await secretStorage.store(key, value);
+	}
+	public extensionPath(): string {
+		return ExtensionContextHolder.context!.extensionUri.fsPath;
+	}
+	public runTerminal(terminalName: string, command: string): void {
+		const terminal = vscode.window.createTerminal(terminalName);
+		terminal.sendText(command);
+		terminal.show();
+	}
+}
diff --git a/test/command/commandManager.test.ts b/test/command/commandManager.test.ts
new file mode 100644
index 0000000..92ac69d
--- /dev/null
+++ b/test/command/commandManager.test.ts
@@ -0,0 +1,76 @@
+import { expect } from 'chai';
+import { describe, it } from 'mocha';
+import CommandManager, { Command } from '../../src/command/commandManager';
+import CustomCommands, { Command as CCommand} from '../../src/command/customCommand';
+
+describe('CommandManager', () => {
+  let commandManager: CommandManager;
+
+  beforeEach(() => {
+    commandManager = CommandManager.getInstance();
+  });
+
+  afterEach(() => {
+    // Reset the command list after each test
+    commandManager['commands'] = [];
+  });
+
+  it('should register a command', () => {
+    const command: Command = {
+      name: 'test',
+      pattern: 'test',
+      description: 'Test command',
+      handler: async (commandName: string, userInput: string) => {
+        return 'Test result';
+      },
+    };
+
+    commandManager.registerCommand(command);
+    expect(commandManager['commands']).to.include(command);
+  });
+
+  it('should return the command list', () => {
+    const command: Command = {
+      name: 'test',
+      pattern: 'test',
+      description: 'Test command',
+      handler: async (commandName: string, userInput: string) => {
+        return 'Test result';
+      },
+    };
+
+    commandManager.registerCommand(command);
+    expect(commandManager.getCommandList()).to.include(command);
+  });
+
+  it('should process text with a command', async () => {
+    const command: Command = {
+      name: 'test',
+      pattern: 'test',
+      description: 'Test command',
+      handler: async (commandName: string, userInput: string) => {
+        return 'Test result';
+      },
+    };
+
+    commandManager.registerCommand(command);
+    const result = await commandManager.processText('/test');
+    expect(result).to.equal('Test result');
+  });
+
+  it('should process text with a custom command', async () => {
+    const customCommand: CCommand = {
+      name: 'customTest',
+      pattern: 'customTest',
+      description: 'Custom test command',
+	  message: 'Custom test result',
+      show: true,
+	  default: false,
+	  instructions: []
+    };
+
+    CustomCommands.getInstance().regCommand(customCommand);
+    const result = await commandManager.processText('/customTest');
+    expect(result).to.equal('  Custom test result');
+  });
+});
\ No newline at end of file
diff --git a/test/command/customCommand.test.ts b/test/command/customCommand.test.ts
new file mode 100644
index 0000000..b0afdc6
--- /dev/null
+++ b/test/command/customCommand.test.ts
@@ -0,0 +1,106 @@
+import { expect } from 'chai';
+import { describe, it } from 'mocha';
+import mockFs from 'mock-fs';
+import * as fs from 'fs';
+import * as path from 'path';
+import CustomCommands, { Command } from '../../src/command/customCommand';
+
+
+describe('CustomCommands', () => {
+  let customCommands: CustomCommands;
+
+  beforeEach(() => {
+    customCommands = CustomCommands.getInstance();
+  });
+
+  afterEach(() => {
+    // Reset the command list after each test
+    customCommands['commands'] = [];
+	mockFs.restore();
+  });
+
+  it('should parse commands from workflows directory', () => {
+    // Mock the file system with two directories, one with _setting_.json and one without
+    mockFs({
+      'workflows': {
+        'command1': {
+          '_setting_.json': JSON.stringify({
+            pattern: 'command1',
+            description: 'Command 1',
+            message: 'Command 1 message',
+            default: false,
+            show: true,
+            instructions: ['instruction1', 'instruction2'],
+          }),
+        },
+        'command2': {
+          // No _setting_.json file
+        },
+      },
+    });
+
+    const workflowsDir = path.join(process.cwd(), 'workflows');
+    customCommands.parseCommands(workflowsDir);
+
+    const expectedResult: Command[] = [
+      {
+        name: 'command1',
+        pattern: 'command1',
+        description: 'Command 1',
+        message: 'Command 1 message',
+        default: false,
+        show: true,
+        instructions: ['instruction1', 'instruction2'],
+      },
+    ];
+
+    expect(customCommands['commands']).to.deep.equal(expectedResult);
+  });
+
+  it('should register a custom command', () => {
+    const command: Command = {
+      name: 'test',
+      pattern: 'test',
+      description: 'Test command',
+      message: 'Test message',
+      default: false,
+      show: true,
+      instructions: ['instruction1', 'instruction2'],
+    };
+
+    customCommands.regCommand(command);
+    expect(customCommands['commands']).to.include(command);
+  });
+
+  it('should get a custom command by name', () => {
+    const command: Command = {
+      name: 'test',
+      pattern: 'test',
+      description: 'Test command',
+      message: 'Test message',
+      default: false,
+      show: true,
+      instructions: ['instruction1', 'instruction2'],
+    };
+
+    customCommands.regCommand(command);
+    const foundCommand = customCommands.getCommand('test');
+    expect(foundCommand).to.deep.equal(command);
+  });
+
+  it('should handle a custom command', () => {
+    const command: Command = {
+      name: 'test',
+      pattern: 'test',
+      description: 'Test command',
+      message: 'Test message',
+      default: false,
+      show: true,
+      instructions: ['instruction1', 'instruction2'],
+    };
+
+    customCommands.regCommand(command);
+    const result = customCommands.handleCommand('test');
+    expect(result).to.equal('[instruction|./.chat/workflows/test/instruction1] [instruction|./.chat/workflows/test/instruction2]  Test message');
+  });
+});
\ No newline at end of file
diff --git a/test/context/contextCodeSelected.test.ts b/test/context/contextCodeSelected.test.ts
new file mode 100644
index 0000000..751785a
--- /dev/null
+++ b/test/context/contextCodeSelected.test.ts
@@ -0,0 +1,43 @@
+import { expect } from 'chai';
+import { describe, it, afterEach, beforeEach } from 'mocha';
+import { handleCodeSelected } from '../../src/context/contextCodeSelected';
+import * as path from 'path';
+import { UiUtilWrapper } from '../../src/util/uiUtil';
+import sinon from 'sinon';
+
+describe('handleCodeSelected', () => {
+  let languageIdStub: sinon.SinonStub;
+  let workspaceFoldersFirstPathStub: sinon.SinonStub;
+  let writeFileStub: sinon.SinonStub;
+
+  beforeEach(() => {
+    // Mock UiUtilWrapper functions
+    languageIdStub = sinon.stub(UiUtilWrapper, 'languageId').resolves('typescript');
+    workspaceFoldersFirstPathStub = sinon.stub(UiUtilWrapper, 'workspaceFoldersFirstPath').returns('test');
+    writeFileStub = sinon.stub(UiUtilWrapper, 'writeFile').resolves();
+  });
+
+  afterEach(() => {
+    // Restore the original functions after each test
+    languageIdStub.restore();
+    workspaceFoldersFirstPathStub.restore();
+    writeFileStub.restore();
+  });
+
+  it('should create a context file with the correct content', async () => {
+    const fileSelected = path.join(__dirname, 'testFile.ts');
+    const codeSelected = 'console.log("Hello, world!");';
+
+    const contextFile = await handleCodeSelected(fileSelected, codeSelected);
+
+    // Check if the mocked functions were called with the correct arguments
+    expect(languageIdStub.calledWith(fileSelected)).to.be.true;
+    expect(workspaceFoldersFirstPathStub.called).to.be.true;
+    expect(writeFileStub.called).to.be.true;
+
+    // Extract the temp file path from the context string
+    const tempFilePath = contextFile.match(/\[context\|(.*?)\]/)?.[1];
+
+    expect(tempFilePath).to.not.be.undefined;
+  });
+});
\ No newline at end of file
diff --git a/test/context/loadContexts.test.ts b/test/context/loadContexts.test.ts
new file mode 100644
index 0000000..223a97d
--- /dev/null
+++ b/test/context/loadContexts.test.ts
@@ -0,0 +1,18 @@
+import { expect } from 'chai';
+import { describe, it } from 'mocha';
+import '../../src/context/loadContexts';
+import ChatContextManager from '../../src/context/contextManager';
+import { gitDiffCachedContext } from '../../src/context/contextGitDiffCached';
+import { gitDiffContext } from '../../src/context/contextGitDiff';
+import { customCommandContext } from '../../src/context/contextCustomCommand';
+
+describe('loadContexts', () => {
+  it('should register all contexts', () => {
+    const chatContextManager = ChatContextManager.getInstance();
+    const contextList = chatContextManager.getContextList();
+
+    expect(contextList).to.include(gitDiffCachedContext);
+    expect(contextList).to.include(gitDiffContext);
+    expect(contextList).to.include(customCommandContext);
+  });
+});
\ No newline at end of file
diff --git a/test/contributes/commandsBase.test.ts b/test/contributes/commandsBase.test.ts
new file mode 100644
index 0000000..8e16ab3
--- /dev/null
+++ b/test/contributes/commandsBase.test.ts
@@ -0,0 +1,84 @@
+// test/commandsBase.test.ts
+
+import { expect } from 'chai';
+import * as commonUtil from '../../src/util/commonUtil';
+import * as commandsBase from '../../src/contributes/commandsBase';
+import sinon from 'sinon';
+
+describe('commandsBase', () => {
+  afterEach(() => {
+    sinon.restore();
+  });
+
+  describe('checkDevChatDependency', () => {
+    it('should return true if DevChat is installed', () => {
+      sinon.stub(commonUtil, 'runCommand').callsFake((command: string) => {
+        if (command === 'python3 -m pipx environment') {
+          return 'PIPX_BIN_DIR=/path/to/bin';
+        } else if (command === 'devchat --help') {
+          return 'DevChat help text';
+        }
+        return '';
+      });
+
+      const result = commandsBase.checkDevChatDependency();
+      expect(result).to.be.true;
+    });
+
+    it('should return false if DevChat is not installed', () => {
+      sinon.stub(commonUtil, 'runCommand').callsFake((command: string) => {
+        if (command === 'python3 -m pipx environment') {
+          return 'PIPX_BIN_DIR=/path/to/bin';
+        } else if (command === 'devchat --help') {
+          throw new Error('Command not found');
+        }
+        return '';
+      });
+
+      const result = commandsBase.checkDevChatDependency();
+      expect(result).to.be.false;
+    });
+
+    it('should return false if pipx environment is not found', () => {
+      sinon.stub(commonUtil, 'runCommand').callsFake((command: string) => {
+        if (command === 'python3 -m pipx environment') {
+          return 'No pipx environment found';
+        }
+        return '';
+      });
+
+      const result = commandsBase.checkDevChatDependency();
+      expect(result).to.be.false;
+    });
+  });
+
+  describe('getPipxEnvironmentPath', () => {
+    afterEach(() => {
+      sinon.restore();
+    });
+
+    it('should return the pipx environment path if found', () => {
+      sinon.stub(commonUtil, 'runCommand').callsFake((command: string) => {
+        if (command === 'python3 -m pipx environment') {
+          return 'PIPX_BIN_DIR=/path/to/bin';
+        }
+        return '';
+      });
+
+      const result = commandsBase.getPipxEnvironmentPath();
+      expect(result).to.equal('/path/to/bin');
+    });
+
+    it('should return null if pipx environment path is not found', () => {
+      sinon.stub(commonUtil, 'runCommand').callsFake((command: string) => {
+        if (command === 'python3 -m pipx environment') {
+          return 'No pipx environment found';
+        }
+        return '';
+      });
+
+      const result = commandsBase.getPipxEnvironmentPath();
+      expect(result).to.be.null;
+    });
+  });
+});
\ No newline at end of file
diff --git a/test/handler/sendMessageBase.test.ts b/test/handler/sendMessageBase.test.ts
new file mode 100644
index 0000000..d6ef5e9
--- /dev/null
+++ b/test/handler/sendMessageBase.test.ts
@@ -0,0 +1,309 @@
+import { expect } from 'chai';
+import { describe, it } from 'mocha';
+import { Context } from 'mocha';
+import sinon from 'sinon';
+import { parseMessage, getInstructionFiles, parseMessageAndSetOptions, getParentHash, handleTopic, handlerResponseText, sendMessageBase, stopDevChatBase } from '../../src/handler/sendMessageBase';
+import DevChat, { ChatResponse } from '../../src/toolwrapper/devchat';
+import CommandManager from '../../src/command/commandManager';
+import messageHistory from '../../src/util/messageHistory';
+import { TopicManager } from '../../src/topic/topicManager';
+import CustomCommands from '../../src/command/customCommand';
+import { UiUtilWrapper } from '../../src/util/uiUtil';
+
+
+describe('sendMessageBase', () => {
+	let workspaceFoldersFirstPathStub: sinon.SinonStub;
+	let getConfigurationStub: sinon.SinonStub;
+
+	beforeEach(() => {
+		workspaceFoldersFirstPathStub = sinon.stub(UiUtilWrapper, 'workspaceFoldersFirstPath');
+		getConfigurationStub = sinon.stub(UiUtilWrapper, 'getConfiguration');
+	});
+
+	afterEach(() => {
+		workspaceFoldersFirstPathStub.restore();
+		getConfigurationStub.restore();
+	});
+
+	describe('parseMessage', () => {
+		it('should parse message correctly', () => {
+			const message = '[context|path/to/context] [instruction|path/to/instruction] [reference|path/to/reference] Hello, world!';
+			const result = parseMessage(message);
+
+			expect(result.context).to.deep.equal(['path/to/context']);
+			expect(result.instruction).to.deep.equal(['path/to/instruction']);
+			expect(result.reference).to.deep.equal(['path/to/reference']);
+			expect(result.text).to.equal('Hello, world!');
+		});
+	});
+
+	describe('getInstructionFiles', () => {
+		it('should return instruction files', () => {
+			const result = getInstructionFiles();
+			expect(result).to.be.an('array');
+		});
+	});
+
+	describe('parseMessageAndSetOptions', () => {
+		it('should parse message and set options correctly', async () => {
+			const message = {
+				text: '[context|path/to/context] [instruction|path/to/instruction] [reference|path/to/reference] Hello, world!'
+			};
+			const chatOptions: any = {};
+
+			const result = await parseMessageAndSetOptions(message, chatOptions);
+
+			expect(result.context).to.deep.equal(['path/to/context']);
+			expect(result.instruction).to.deep.equal(['path/to/instruction']);
+			expect(result.reference).to.deep.equal(['path/to/reference']);
+			expect(result.text).to.equal('Hello, world!');
+			expect(chatOptions.context).to.deep.equal(['path/to/context']);
+			expect(chatOptions.header).to.deep.equal(['path/to/instruction']);
+			expect(chatOptions.reference).to.deep.equal(['path/to/reference']);
+		});
+	});
+
+	describe('getParentHash', () => {
+		beforeEach(() => {
+			messageHistory.clear();
+		});
+
+		it('should return parent hash when message hash is provided and found in history', () => {
+			const message1 = {
+				hash: 'somehash1',
+				parentHash: 'parentHash1'
+			};
+			const message2 = {
+				hash: 'somehash2',
+				parentHash: 'parentHash2'
+			};
+			messageHistory.add(message1);
+			messageHistory.add(message2);
+
+			const message = {
+				hash: 'somehash1'
+			};
+
+			const result = getParentHash(message);
+			expect(result).to.equal('parentHash1');
+		});
+
+		it('should return undefined when message hash is provided but not found in history', () => {
+			const message1 = {
+				hash: 'somehash1',
+				parentHash: 'parentHash1'
+			};
+			const message2 = {
+				hash: 'somehash2',
+				parentHash: 'parentHash2'
+			};
+			messageHistory.add(message1);
+			messageHistory.add(message2);
+
+			const message = {
+				hash: 'nonexistenthash'
+			};
+
+			const result = getParentHash(message);
+			expect(result).to.be.undefined;
+		});
+
+		it('should return last message hash when message hash is not provided', () => {
+			const message1 = {
+				hash: 'somehash1',
+				parentHash: 'parentHash1'
+			};
+			const message2 = {
+				hash: 'somehash2',
+				parentHash: 'parentHash2'
+			};
+			messageHistory.add(message1);
+			messageHistory.add(message2);
+
+			const message = {};
+
+			const result = getParentHash(message);
+			expect(result).to.equal('somehash2');
+		});
+
+		it('should return undefined when message hash is not provided and history is empty', () => {
+			const message = {};
+
+			const result = getParentHash(message);
+			expect(result).to.be.undefined;
+		});
+	});
+
+	describe('handleTopic', () => {
+		it('should handle topic correctly', async () => {
+			const parentHash = 'somehash';
+			const message = {
+				text: 'Hello, world!'
+			};
+			const chatResponse: ChatResponse = {
+				response: 'Hello, user!',
+				isError: false,
+				user: 'user',
+				date: '2022-01-01T00:00:00.000Z',
+				'prompt-hash': 'responsehash'
+			};
+
+			await handleTopic(parentHash, message, chatResponse);
+			// Check if the topic was updated correctly
+		});
+	});
+
+	describe('handlerResponseText', () => {
+		it('should handle response text correctly when isError is false', async () => {
+			const partialDataText = 'Partial data';
+			const chatResponse: ChatResponse = {
+				response: 'Hello, user!',
+				isError: false,
+				user: 'user',
+				date: '2022-01-01T00:00:00.000Z',
+				'prompt-hash': 'responsehash'
+			};
+
+			const result = await handlerResponseText(partialDataText, chatResponse);
+			expect(result).to.equal('Hello, user!');
+		});
+
+		it('should handle response text correctly when isError is true', async () => {
+			const partialDataText = 'Partial data';
+			const chatResponse: ChatResponse = {
+				response: 'Error occurred!',
+				isError: true,
+				user: 'user',
+				date: '2022-01-01T00:00:00.000Z',
+				'prompt-hash': 'responsehash'
+			};
+
+			const result = await handlerResponseText(partialDataText, chatResponse);
+			expect(result).to.equal('Partial data\n\nError occurred!');
+		});
+	});
+
+	describe('sendMessageBase', async () => {
+		it('should send message correct with openai api key', async () => {
+			const message = {
+				text: 'Hello, world!'
+			};
+			const handlePartialData = (data: { command: string, text: string, user: string, date: string }) => {
+				// Handle partial data
+			};
+
+			workspaceFoldersFirstPathStub.returns('./');
+
+			getConfigurationStub.withArgs('DevChat', 'API_KEY').returns('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');
+			getConfigurationStub.withArgs('DevChat', 'OpenAI.model').returns('gpt-4');
+			getConfigurationStub.withArgs('DevChat', 'OpenAI.temperature').returns(0);
+			getConfigurationStub.withArgs('DevChat', 'OpenAI.stream').returns('true');
+			getConfigurationStub.withArgs('DevChat', 'llmModel').returns('OpenAI');
+			getConfigurationStub.withArgs('DevChat', 'OpenAI.tokensPerPrompt').returns(9000);
+
+			const result = await sendMessageBase(message, handlePartialData);
+			expect(result).to.be.an('object');
+			expect(result!.command).to.equal('receiveMessage');
+			expect(result!.text).to.be.a('string');
+			expect(result!.hash).to.be.a('string');
+			expect(result!.user).to.be.a('string');
+			expect(result!.date).to.be.a('string');
+			expect(result!.isError).to.be.false;
+		}).timeout(10000);
+
+		it('should send message correct with DevChat access key', async () => {
+			const message = {
+				text: 'Hello, world!'
+			};
+			const handlePartialData = (data: { command: string, text: string, user: string, date: string }) => {
+				// Handle partial data
+			};
+
+			workspaceFoldersFirstPathStub.returns('./');
+
+			getConfigurationStub.withArgs('DevChat', 'API_KEY').returns('DC.eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJvcmdfaWQiOjY2MTI0NDU1ODE2LCJqdGkiOjcyMzc4ODIzMjI3Mjc4MzI2NTJ9.qGWJ_NyWjjj66oa5mbfi3Hjawe-Yp8syCDLkpyu4yS0');
+			getConfigurationStub.withArgs('DevChat', 'OpenAI.model').returns('gpt-4');
+			getConfigurationStub.withArgs('DevChat', 'OpenAI.temperature').returns(0);
+			getConfigurationStub.withArgs('DevChat', 'OpenAI.stream').returns('true');
+			getConfigurationStub.withArgs('DevChat', 'llmModel').returns('OpenAI');
+			getConfigurationStub.withArgs('DevChat', 'OpenAI.tokensPerPrompt').returns(9000);
+
+			const result = await sendMessageBase(message, handlePartialData);
+			expect(result).to.be.an('object');
+			expect(result!.command).to.equal('receiveMessage');
+			expect(result!.text).to.be.a('string');
+			expect(result!.hash).to.be.a('string');
+			expect(result!.user).to.be.a('string');
+			expect(result!.date).to.be.a('string');
+			expect(result!.isError).to.be.false;
+		}).timeout(10000);
+
+		it('should send message error with invalid api key', async () => {
+			const message = {
+				text: 'Hello, world!'
+			};
+			const handlePartialData = (data: { command: string, text: string, user: string, date: string }) => {
+				// Handle partial data
+			};
+
+			workspaceFoldersFirstPathStub.returns('./');
+
+			getConfigurationStub.withArgs('DevChat', 'API_KEY').returns('sk-KvH7ZCtHmFDCBTqH0jUv');
+			getConfigurationStub.withArgs('DevChat', 'OpenAI.model').returns('gpt-4');
+			getConfigurationStub.withArgs('DevChat', 'OpenAI.temperature').returns('0');
+			getConfigurationStub.withArgs('DevChat', 'OpenAI.stream').returns('true');
+			getConfigurationStub.withArgs('DevChat', 'llmModel').returns('OpenAI');
+			getConfigurationStub.withArgs('DevChat', 'OpenAI.tokensPerPrompt').returns('9000');
+
+			const result = await sendMessageBase(message, handlePartialData);
+			expect(result).to.be.an('object');
+			expect(result!.command).to.equal('receiveMessage');
+			expect(result!.text).to.be.a('string');
+			expect(result!.hash).to.be.a('string');
+			expect(result!.user).to.be.a('string');
+			expect(result!.date).to.be.a('string');
+			expect(result!.isError).to.be.true;
+		}).timeout(10000);
+	});
+
+	describe('stopDevChatBase', () => {
+		it('should stop sendMessageBase correctly', async () => {
+			const message = {
+				text: 'Hello, world!'
+			};
+			const handlePartialData = (data: { command: string, text: string, user: string, date: string }) => {
+				// Handle partial data
+			};
+
+			workspaceFoldersFirstPathStub.returns('./');
+
+			getConfigurationStub.withArgs('DevChat', 'API_KEY').returns('DC.eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJvcmdfaWQiOjY2MTI0NDU1ODE2LCJqdGkiOjcyMzc4ODIzMjI3Mjc4MzI2NTJ9.qGWJ_NyWjjj66oa5mbfi3Hjawe-Yp8syCDLkpyu4yS0');
+			getConfigurationStub.withArgs('DevChat', 'OpenAI.model').returns('gpt-4');
+			getConfigurationStub.withArgs('DevChat', 'OpenAI.temperature').returns(0);
+			getConfigurationStub.withArgs('DevChat', 'OpenAI.stream').returns('true');
+			getConfigurationStub.withArgs('DevChat', 'llmModel').returns('OpenAI');
+			getConfigurationStub.withArgs('DevChat', 'OpenAI.tokensPerPrompt').returns(9000);
+
+
+			// Start sendMessageBase in a separate Promise
+			const sendMessagePromise = sendMessageBase(message, handlePartialData);
+
+			// Wait for a short period to ensure sendMessageBase has started
+			await new Promise((resolve) => setTimeout(resolve, 100));
+
+			// Call stopDevChatBase
+			const stopMessage = {
+				text: 'stop'
+			};
+			await stopDevChatBase(stopMessage);
+
+			// Check if sendMessageBase has been stopped and returns an error
+			try {
+				const result = await sendMessagePromise;
+				expect(result).to.undefined;
+			} catch (error) {
+				expect(error).to.be.an('error');
+			}
+		});
+	});
+});
\ No newline at end of file
diff --git a/test/toolwrapper/devchat.test.ts b/test/toolwrapper/devchat.test.ts
new file mode 100644
index 0000000..40b8289
--- /dev/null
+++ b/test/toolwrapper/devchat.test.ts
@@ -0,0 +1,60 @@
+import { expect } from 'chai';
+import { describe, it } from 'mocha';
+import sinon from 'sinon';
+import DevChat, { ChatOptions } from '../../src/toolwrapper/devchat';
+import { CommandRun } from '../../src/util/commonUtil';
+import { UiUtilWrapper } from '../../src/util/uiUtil';
+
+describe('DevChat', () => {
+  let devChat: DevChat;
+  let spawnAsyncStub: sinon.SinonStub;
+  let workspaceFoldersFirstPathStub: sinon.SinonStub;
+
+  beforeEach(() => {
+    devChat = new DevChat();
+    spawnAsyncStub = sinon.stub(CommandRun.prototype, 'spawnAsync');
+    workspaceFoldersFirstPathStub = sinon.stub(UiUtilWrapper, 'workspaceFoldersFirstPath');
+  });
+
+  afterEach(() => {
+    spawnAsyncStub.restore();
+    workspaceFoldersFirstPathStub.restore();
+  });
+
+
+  describe('chat', () => {
+    it('should return a ChatResponse object with isError false when the chat is successful', async () => {
+      const content = 'Test chat content';
+      const options: ChatOptions = {
+        // Provide mock values for the options
+        parent: 'parent_value',
+        reference: ['ref1', 'ref2'],
+        header: ['header1', 'header2'],
+        context: ['context1', 'context2'],
+      };
+      const mockResponse = {
+        exitCode: 0,
+        stdout: 'User: Test user\nDate: 2022-01-01\nprompt-hash: 12345\nTest chat response',
+        stderr: '',
+      };
+      const mockWorkspacePath = './';
+
+      spawnAsyncStub.resolves(mockResponse);
+      workspaceFoldersFirstPathStub.returns(mockWorkspacePath);
+
+			const response = await devChat.chat(content, options, (data)=>{});
+
+      expect(response).to.have.property('prompt-hash', '12345');
+      expect(response).to.have.property('user', 'Test user');
+      expect(response).to.have.property('date', '2022-01-01');
+      expect(response).to.have.property('response', 'Test chat response');
+      expect(response).to.have.property('isError', false);
+      expect(spawnAsyncStub.calledOnce).to.be.true;
+      expect(workspaceFoldersFirstPathStub.calledOnce).to.be.true;
+    });
+
+    // Add more test cases for the chat method here
+  });
+
+  // ... other test cases
+});
\ No newline at end of file
diff --git a/test/toolwrapper/dtm.test.ts b/test/toolwrapper/dtm.test.ts
new file mode 100644
index 0000000..229bc3d
--- /dev/null
+++ b/test/toolwrapper/dtm.test.ts
@@ -0,0 +1,64 @@
+import { expect } from 'chai';
+import { describe, it } from 'mocha';
+import sinon from 'sinon';
+import DtmWrapper from '../../src/toolwrapper/dtm';
+
+
+describe('DtmWrapper', () => {
+	let dtmWrapper: DtmWrapper;
+	let commitStub: sinon.SinonStub;
+	let commitAllStub: sinon.SinonStub;
+  
+	beforeEach(() => {
+	  dtmWrapper = new DtmWrapper();
+	  commitStub = sinon.stub(dtmWrapper, 'commit');
+	  commitAllStub = sinon.stub(dtmWrapper, 'commitall');
+	});
+  
+	afterEach(() => {
+	  commitStub.restore();
+	  commitAllStub.restore();
+	});
+
+  describe('commit', () => {
+    it('should return a DtmResponse object with status 0 when the commit is successful', async () => {
+      const commitMsg = 'Test commit message';
+      const mockResponse = {
+        status: 0,
+        message: 'Commit successful',
+        log: 'Commit log',
+      };
+
+      commitStub.resolves(mockResponse);
+
+      const response = await dtmWrapper.commit(commitMsg);
+
+      expect(response).to.have.property('status', 0);
+      expect(response).to.have.property('message');
+      expect(response).to.have.property('log');
+      expect(commitStub.calledOnce).to.be.true;
+    });
+
+    // Add more test cases for the commit method here
+  });
+
+  describe('commitall', () => {
+    it('should return a DtmResponse object with status 0 when the commit is successful', async () => {
+		const commitMsg = 'Test commit message';
+		const mockResponse = {
+		  status: 0,
+		  message: 'Commit all successful',
+		  log: 'Commit all log',
+		};
+  
+		commitAllStub.resolves(mockResponse);
+  
+		const response = await dtmWrapper.commitall(commitMsg);
+  
+		expect(response).to.have.property('status', 0);
+		expect(response).to.have.property('message');
+		expect(response).to.have.property('log');
+		expect(commitAllStub.calledOnce).to.be.true;
+	  });
+  });
+});
\ No newline at end of file
diff --git a/test/topic/loadTopics.test.ts b/test/topic/loadTopics.test.ts
new file mode 100644
index 0000000..c363fcc
--- /dev/null
+++ b/test/topic/loadTopics.test.ts
@@ -0,0 +1,49 @@
+import { expect } from 'chai';
+import { describe, it } from 'mocha';
+import { LogEntry } from '../../src/toolwrapper/devchat';
+import { loadTopicList } from '../../src/topic/loadTopics';
+
+describe('loadTopicList', () => {
+  it('should create topic lists from chat logs', () => {
+    const chatLogs: LogEntry[] = [
+      { hash: '1', parent: '', user: 'user1', date: '2022-01-01', request: 'request1', response: 'response1', context: []},
+      { hash: '2', parent: '1', user: 'user2', date: '2022-01-02', request: 'request2', response: 'response2', context: []},
+      { hash: '3', parent: '2', user: 'user3', date: '2022-01-03', request: 'request3', response: 'response3', context: []},
+      { hash: '4', parent: '', user: 'user4', date: '2022-01-04', request: 'request4', response: 'response4', context: []},
+      { hash: '5', parent: '4', user: 'user5', date: '2022-01-05', request: 'request5', response: 'response5', context: []},
+    ];
+
+    const expectedTopicLists = {
+      '1': [
+        { hash: '1', parent: '', user: 'user1', date: '2022-01-01', request: 'request1', response: 'response1', context: []},
+        { hash: '2', parent: '1', user: 'user2', date: '2022-01-02', request: 'request2', response: 'response2', context: []},
+        { hash: '3', parent: '2', user: 'user3', date: '2022-01-03', request: 'request3', response: 'response3', context: []},
+      ],
+      '4': [
+        { hash: '4', parent: '', user: 'user4', date: '2022-01-04', request: 'request4', response: 'response4', context: []},
+        { hash: '5', parent: '4', user: 'user5', date: '2022-01-05', request: 'request5', response: 'response5', context: []},
+      ],
+    };
+
+    const topicLists = loadTopicList(chatLogs);
+    expect(topicLists).to.deep.equal(expectedTopicLists);
+  });
+
+  it('should handle empty chat logs', () => {
+    const chatLogs: LogEntry[] = [];
+    const expectedTopicLists = {};
+    const topicLists = loadTopicList(chatLogs);
+    expect(topicLists).to.deep.equal(expectedTopicLists);
+  });
+
+  it('should handle chat logs with no root entries', () => {
+    const chatLogs: LogEntry[] = [
+      { hash: '1', parent: '0', user: 'user1', date: '2022-01-01', request: 'request1', response: 'response1', context: []},
+      { hash: '2', parent: '1', user: 'user2', date: '2022-01-02', request: 'request2', response: 'response2', context: []},
+    ];
+
+    const expectedTopicLists = {};
+    const topicLists = loadTopicList(chatLogs);
+    expect(topicLists).to.deep.equal(expectedTopicLists);
+  });
+});
\ No newline at end of file
diff --git a/test/topic/topicManager.test.ts b/test/topic/topicManager.test.ts
new file mode 100644
index 0000000..a17901c
--- /dev/null
+++ b/test/topic/topicManager.test.ts
@@ -0,0 +1,97 @@
+import { expect } from 'chai';
+import { describe, it } from 'mocha';
+
+import { TopicManager } from '../../src/topic/topicManager';
+
+describe('TopicManager', () => {
+	let topicManager: TopicManager;
+
+	beforeEach(() => {
+		topicManager = TopicManager.getInstance();
+	});
+
+	afterEach(() => {
+		// Reset topics and currentTopicId after each test
+		topicManager['_topics'] = {};
+		topicManager.currentTopicId = undefined;
+	});
+
+	it('getInstance should return a singleton instance', () => {
+		const instance1 = TopicManager.getInstance();
+		const instance2 = TopicManager.getInstance();
+		expect(instance1).to.equal(instance2);
+	});
+
+	it('createTopic should create a new topic', () => {
+		const topic = topicManager.createTopic();
+		expect(topic).to.be.not.undefined;
+		expect(topic.topicId).to.be.not.undefined;
+		expect(topicManager.getTopic(topic.topicId)).to.equal(topic);
+	});
+
+	it('getTopicList should return a list of topics', () => {
+		const topic1 = topicManager.createTopic();
+		const topic2 = topicManager.createTopic();
+		const topicList = topicManager.getTopicList();
+		expect(topicList).to.include(topic1);
+		expect(topicList).to.include(topic2);
+	});
+
+	it('setCurrentTopic should set the current topic ID', () => {
+		const topic = topicManager.createTopic();
+		topicManager.setCurrentTopic(topic.topicId);
+		expect(topicManager.currentTopicId).to.equal(topic.topicId);
+	});
+
+	it('updateTopic should update the topic with the given properties', () => {
+		const topic = topicManager.createTopic();
+		const newMessageHash = 'new-message-hash';
+		const messageDate = Date.now();
+		const requestMessage = 'Request message';
+		const responseMessage = 'Response message';
+
+		topicManager.updateTopic(topic.topicId, newMessageHash, messageDate, requestMessage, responseMessage);
+
+		const updatedTopic = topicManager.getTopic(topic.topicId);
+		expect(updatedTopic!.name).to.equal(`${requestMessage} - ${responseMessage}`);
+		expect(updatedTopic!.firstMessageHash).to.equal(newMessageHash);
+		expect(updatedTopic!.lastMessageHash).to.equal(newMessageHash);
+		expect(updatedTopic!.lastUpdated).to.equal(messageDate);
+	});
+
+	it('updateTopic should not update the topic if the topic does not exist', () => {
+		const nonExistentTopicId = 'non-existent-topic-id';
+		const newMessageHash = 'new-message-hash';
+		const messageDate = Date.now();
+		const requestMessage = 'Request message';
+		const responseMessage = 'Response message';
+
+		topicManager.updateTopic(nonExistentTopicId, newMessageHash, messageDate, requestMessage, responseMessage);
+
+		const nonExistentTopic = topicManager.getTopic(nonExistentTopicId);
+		expect(nonExistentTopic).to.be.undefined;
+	});
+
+	it('deleteTopic should delete the topic with the given ID', () => {
+		const topic = topicManager.createTopic();
+		topicManager.deleteTopic(topic.topicId);
+		expect(topicManager.getTopic(topic.topicId)).to.be.undefined;
+	  });
+	
+	  it('deleteTopic should not throw an error if the topic does not exist', () => {
+		const nonExistentTopicId = 'non-existent-topic-id';
+		expect(() => {
+		  topicManager.deleteTopic(nonExistentTopicId);
+		}).to.not.throw();
+	  });
+	
+	  it('deleteTopic should set the currentTopicId to undefined if the deleted topic was the current topic', () => {
+		const topic = topicManager.createTopic();
+		topicManager.setCurrentTopic(topic.topicId);
+		topicManager.deleteTopic(topic.topicId);
+		expect(topicManager.currentTopicId).to.be.undefined;
+	  });
+	
+
+	// Add more test cases for other methods in TopicManager
+});
\ No newline at end of file
diff --git a/test/util/apiKey.test.ts b/test/util/apiKey.test.ts
new file mode 100644
index 0000000..5a0e4b3
--- /dev/null
+++ b/test/util/apiKey.test.ts
@@ -0,0 +1,91 @@
+// test/apiKey.test.ts
+
+import { expect } from 'chai';
+import { ApiKeyManager } from '../../src/util/apiKey';
+import { UiUtilWrapper } from '../../src/util/uiUtil';
+import sinon from 'sinon';
+
+describe('ApiKeyManager', () => {
+  afterEach(() => {
+    sinon.restore();
+	delete process.env.OPENAI_API_KEY;
+    delete process.env.OPENAI_API_BASE;
+  });
+
+  describe('getApiKey', () => {
+    it('should return the secret storage API key', async () => {
+      sinon.stub(UiUtilWrapper, 'secretStorageGet').resolves('sk.secret');
+      sinon.stub(UiUtilWrapper, 'getConfiguration').returns(undefined);
+
+      const apiKey = await ApiKeyManager.getApiKey();
+      expect(apiKey).to.equal('sk.secret');
+    });
+
+    it('should return the configuration API key', async () => {
+      sinon.stub(UiUtilWrapper, 'secretStorageGet').resolves(undefined);
+      sinon.stub(UiUtilWrapper, 'getConfiguration').returns('sk.config');
+
+      const apiKey = await ApiKeyManager.getApiKey();
+      expect(apiKey).to.equal('sk.config');
+    });
+
+    it('should return the environment variable API key', async () => {
+      sinon.stub(UiUtilWrapper, 'secretStorageGet').resolves(undefined);
+      sinon.stub(UiUtilWrapper, 'getConfiguration').returns(undefined);
+      process.env.OPENAI_API_KEY = 'sk.env';
+
+      const apiKey = await ApiKeyManager.getApiKey();
+      expect(apiKey).to.equal('sk.env');
+    });
+  });
+
+  describe('getEndPoint', () => {
+    it('should return the configuration endpoint', () => {
+      sinon.stub(UiUtilWrapper, 'getConfiguration').returns('https://config-endpoint.com');
+
+      const endPoint = ApiKeyManager.getEndPoint('sk.key');
+      expect(endPoint).to.equal('https://config-endpoint.com');
+    });
+
+    it('should return the environment variable endpoint', () => {
+      sinon.stub(UiUtilWrapper, 'getConfiguration').returns(undefined);
+      process.env.OPENAI_API_BASE = 'https://env-endpoint.com';
+
+      const endPoint = ApiKeyManager.getEndPoint('sk.key');
+      expect(endPoint).to.equal('https://env-endpoint.com');
+    });
+
+    it('should return the default endpoint for DC keys', () => {
+      sinon.stub(UiUtilWrapper, 'getConfiguration').returns(undefined);
+
+      const endPoint = ApiKeyManager.getEndPoint('DC.key');
+      expect(endPoint).to.equal('https://xw4ymuy6qj.ap-southeast-1.awsapprunner.com/api/v1');
+    });
+  });
+
+  describe('getKeyType', () => {
+    it('should return "sk" for sk keys', () => {
+      const keyType = ApiKeyManager.getKeyType('sk.key');
+      expect(keyType).to.equal('sk');
+    });
+
+    it('should return "DC" for DC keys', () => {
+      const keyType = ApiKeyManager.getKeyType('DC.key');
+      expect(keyType).to.equal('DC');
+    });
+
+    it('should return undefined for invalid keys', () => {
+      const keyType = ApiKeyManager.getKeyType('invalid.key');
+      expect(keyType).to.be.undefined;
+    });
+  });
+
+  describe('writeApiKeySecret', () => {
+    it('should store the API key in secret storage', async () => {
+      const storeSecretStub = sinon.stub(UiUtilWrapper, 'storeSecret').resolves();
+
+      await ApiKeyManager.writeApiKeySecret('sk.secret');
+      expect(storeSecretStub.calledWith('devchat_OPENAI_API_KEY', 'sk.secret')).to.be.true;
+    });
+  });
+});
\ No newline at end of file
diff --git a/test/util/commonUtil.test.ts b/test/util/commonUtil.test.ts
new file mode 100644
index 0000000..53d8558
--- /dev/null
+++ b/test/util/commonUtil.test.ts
@@ -0,0 +1,138 @@
+// test/commonUtil.test.ts
+
+import { expect } from 'chai';
+import * as fs from 'fs';
+import * as os from 'os';
+import * as path from 'path';
+import {
+	createTempSubdirectory,
+	CommandRun,
+	runCommandAndWriteOutput,
+	runCommandStringAndWriteOutput,
+	getLanguageIdByFileName,
+} from '../../src/util/commonUtil';
+import { UiUtilWrapper } from '../../src/util/uiUtil';
+
+import sinon from 'sinon';
+
+describe('commonUtil', () => {
+	afterEach(() => {
+		sinon.restore();
+	});
+
+	describe('createTempSubdirectory', () => {
+		it('should create a temporary subdirectory', () => {
+			const tempDir = os.tmpdir();
+			const subdir = 'test-subdir';
+			const targetDir = createTempSubdirectory(subdir);
+
+			expect(targetDir.startsWith(path.join(tempDir, subdir))).to.be.true;
+			expect(fs.existsSync(targetDir)).to.be.true;
+			fs.rmdirSync(targetDir, { recursive: true });
+		});
+	});
+
+	describe('CommandRun', () => {
+		it('should run a command and capture stdout and stderr', async () => {
+			const command = 'echo';
+			const args = ['hello', 'world'];
+			const options = { shell: true };
+
+			const run = new CommandRun();
+			const result = await run.spawnAsync(command, args, options, undefined, undefined, undefined, undefined);
+
+			expect(result.exitCode).to.equal(0);
+			expect(result.stdout.trim()).to.equal('hello world');
+			expect(result.stderr).to.equal('');
+		});
+
+		it('should run a command and write output to a file', async () => {
+			const command = 'echo';
+			const args = ['hello', 'world'];
+			const options = { shell: true };
+			const outputFile = path.join(os.tmpdir(), 'test-output.txt');
+
+			const run = new CommandRun();
+			const result = await run.spawnAsync(command, args, options, undefined, undefined, undefined, outputFile);
+
+			expect(result.exitCode).to.equal(0);
+			expect(result.stdout.trim()).to.equal('hello world');
+			expect(result.stderr).to.equal('');
+			expect(fs.readFileSync(outputFile, 'utf-8').trim()).to.equal('hello world');
+			fs.unlinkSync(outputFile);
+		});
+
+		it('should handle command not found error and output the error message', async () => {
+			const command = 'nonexistent-command';
+			const args: string[] = [];
+			const options = { shell: true };
+
+			const run = new CommandRun();
+
+			const result = await run.spawnAsync(
+				command,
+				args,
+				options,
+				undefined,
+				undefined,
+				undefined,
+				undefined
+			);
+
+			expect(result.exitCode).to.not.equal(0);
+			expect(result.stderr).to.include(`${command}: command not found`);
+		});
+	});
+
+	describe('runCommandAndWriteOutput', () => {
+		it('should run a command and write output to a file', async () => {
+			const command = 'echo';
+			const args: string[] = ['hello', 'world'];
+			const outputFile = path.join(os.tmpdir(), 'test-output.txt');
+
+			await runCommandAndWriteOutput(command, args, outputFile);
+
+			expect(fs.readFileSync(outputFile, 'utf-8').trim()).to.equal('hello world');
+			fs.unlinkSync(outputFile);
+		});
+	});
+	describe('runCommandStringAndWriteOutput', () => {
+		it('should run a command string and write output to a file', async () => {
+			const commandString = 'echo hello world';
+			const outputFile = path.join(os.tmpdir(), 'test-output.txt');
+
+			await runCommandStringAndWriteOutput(commandString, outputFile);
+
+			const fileContent = fs.readFileSync(outputFile, 'utf-8').trim();
+			const parsedContent = JSON.parse(fileContent);
+
+			expect(parsedContent.command).to.equal(commandString);
+			expect(parsedContent.content.trim()).to.equal('hello world');
+			fs.unlinkSync(outputFile);
+		});
+	});
+
+	describe('getLanguageIdByFileName', () => {
+		beforeEach(() => {
+			sinon.stub(UiUtilWrapper, 'languageId').callsFake(async (fileName: string) => {
+				const languageIds: { [key: string]: string } = {
+					'test.py': 'python',
+					'test.js': 'javascript',
+					'test.ts': 'typescript',
+				};
+				return languageIds[fileName];
+			});
+		});
+
+		afterEach(() => {
+			sinon.restore();
+		});
+
+		it('should return the correct language ID for a given file name', async () => {
+			expect(await getLanguageIdByFileName('test.py')).to.equal('python');
+			expect(await getLanguageIdByFileName('test.js')).to.equal('javascript');
+			expect(await getLanguageIdByFileName('test.ts')).to.equal('typescript');
+			expect(await getLanguageIdByFileName('test.unknown')).to.equal(undefined);
+		});
+	});
+});
\ No newline at end of file
diff --git a/test/util/filePairManager.test.ts b/test/util/filePairManager.test.ts
new file mode 100644
index 0000000..246e851
--- /dev/null
+++ b/test/util/filePairManager.test.ts
@@ -0,0 +1,45 @@
+import { expect } from 'chai';
+import { describe, it } from 'mocha';
+import { FilePairManager } from '../../src/util/diffFilePairs';
+
+describe('FilePairManager', () => {
+  let filePairManager: FilePairManager;
+
+  beforeEach(() => {
+    filePairManager = FilePairManager.getInstance();
+  });
+
+  afterEach(() => {
+    // Clear the filePairs map after each test
+    (filePairManager as any).filePairs.clear();
+  });
+
+  it('add file pair', () => {
+    const file1 = 'file1.txt';
+    const file2 = 'file2.txt';
+    filePairManager.addFilePair(file1, file2);
+    expect(filePairManager.findPair(file1)).to.deep.equal([file1, file2]);
+    expect(filePairManager.findPair(file2)).to.deep.equal([file1, file2]);
+  });
+
+  it('find pair', () => {
+    const file1 = 'file1.txt';
+    const file2 = 'file2.txt';
+    const file3 = 'file3.txt';
+    const file4 = 'file4.txt';
+    filePairManager.addFilePair(file1, file2);
+    filePairManager.addFilePair(file3, file4);
+    expect(filePairManager.findPair(file1)).to.deep.equal([file1, file2]);
+    expect(filePairManager.findPair(file2)).to.deep.equal([file1, file2]);
+    expect(filePairManager.findPair(file3)).to.deep.equal([file3, file4]);
+    expect(filePairManager.findPair(file4)).to.deep.equal([file3, file4]);
+  });
+
+  it('find non-existent pair', () => {
+    const file1 = 'file1.txt';
+    const file2 = 'file2.txt';
+    const file3 = 'file3.txt';
+    filePairManager.addFilePair(file1, file2);
+    expect(filePairManager.findPair(file3)).to.be.undefined;
+  });
+});
\ No newline at end of file
diff --git a/test/util/logger.test.ts b/test/util/logger.test.ts
new file mode 100644
index 0000000..03cf2d0
--- /dev/null
+++ b/test/util/logger.test.ts
@@ -0,0 +1,64 @@
+// test/util/logger.test.ts
+
+import { expect } from 'chai';
+import { describe, it } from 'mocha';
+import { logger, LogChannel } from '../../src/util/logger';
+
+class MockLogChannel implements LogChannel {
+  logs: string[] = [];
+
+  info(message: string, ...args: any[]): void {
+    this.logs.push(`[INFO] ${message} ${args.join(' ')}`);
+  }
+
+  warn(message: string, ...args: any[]): void {
+    this.logs.push(`[WARN] ${message} ${args.join(' ')}`);
+  }
+
+  error(message: string | Error, ...args: any[]): void {
+    this.logs.push(`[ERROR] ${message} ${args.join(' ')}`);
+  }
+
+  debug(message: string, ...args: any[]): void {
+    this.logs.push(`[DEBUG] ${message} ${args.join(' ')}`);
+  }
+
+  show(): void {
+    // Do nothing
+  }
+}
+
+describe('logger', () => {
+  it('should initialize the logger and create a channel', () => {
+    // Arrange
+    const mockChannel = new MockLogChannel();
+
+    // Act
+    logger.init(mockChannel);
+
+    // Assert
+    const channel = logger.channel();
+    expect(channel).to.not.be.undefined;
+    expect(channel).to.equal(mockChannel);
+  });
+
+  it('should log messages using the initialized channel', () => {
+    // Arrange
+    const mockChannel = new MockLogChannel();
+    logger.init(mockChannel);
+
+    // Act
+    logger.channel()?.info('Test info message');
+    logger.channel()?.warn('Test warn message');
+    logger.channel()?.error('Test error message');
+    logger.channel()?.debug('Test debug message');
+
+    // Assert
+    expect(mockChannel.logs).to.deep.equal([
+      '[INFO] Test info message ',
+      '[WARN] Test warn message ',
+      '[ERROR] Test error message ',
+      '[DEBUG] Test debug message ',
+    ]);
+  });
+});
\ No newline at end of file
diff --git a/test/util/messageHistory.test.ts b/test/util/messageHistory.test.ts
new file mode 100644
index 0000000..159df12
--- /dev/null
+++ b/test/util/messageHistory.test.ts
@@ -0,0 +1,45 @@
+import { expect } from 'chai';
+import { describe, it } from 'mocha';
+import { MessageHistory } from '../../src/util/messageHistory';
+
+describe('MessageHistory', () => {
+  let messageHistory: MessageHistory;
+
+  beforeEach(() => {
+    messageHistory = new MessageHistory();
+  });
+
+  it('add message', () => {
+    const message = { hash: '123', content: 'Hello' };
+    messageHistory.add(message);
+    expect(messageHistory.find('123')).to.deep.equal(message);
+  });
+
+  it('find message by hash', () => {
+    const message1 = { hash: '123', content: 'Hello' };
+    const message2 = { hash: '456', content: 'World' };
+    messageHistory.add(message1);
+    messageHistory.add(message2);
+    expect(messageHistory.find('123')).to.deep.equal(message1);
+    expect(messageHistory.find('456')).to.deep.equal(message2);
+  });
+
+  it('find last message', () => {
+    const message1 = { hash: '123', content: 'Hello' };
+    const message2 = { hash: '456', content: 'World' };
+    messageHistory.add(message1);
+    messageHistory.add(message2);
+    expect(messageHistory.findLast()).to.deep.equal(message2);
+  });
+
+  it('clear history', () => {
+    const message1 = { hash: '123', content: 'Hello' };
+    const message2 = { hash: '456', content: 'World' };
+    messageHistory.add(message1);
+    messageHistory.add(message2);
+    messageHistory.clear();
+    expect(messageHistory.find('123')).to.be.undefined;
+    expect(messageHistory.find('456')).to.be.undefined;
+    expect(messageHistory.findLast()).to.be.null;
+  });
+});
\ No newline at end of file
diff --git a/test/util/utils.test.ts b/test/util/utils.test.ts
new file mode 100644
index 0000000..d60892e
--- /dev/null
+++ b/test/util/utils.test.ts
@@ -0,0 +1,13 @@
+import { expect } from 'chai';
+import { describe, it } from 'mocha';
+
+describe('yourFunction', () => {
+  it('should return the correct result for input 1', () => {
+    const input = 1;
+    const expectedResult = 'expectedResult';
+    const result = 'expectedResult';
+    expect(result).to.equal(expectedResult);
+  });
+
+  // Add more test cases here
+});
\ No newline at end of file
diff --git a/tsconfig.json b/tsconfig.json
index 9c5ae0e..525d19d 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -13,5 +13,6 @@
 		"strict": true,
 		"jsx": "react",
 		"esModuleInterop": true
-	}
+	},
+	"exclude": ["test"]
 }
\ No newline at end of file
diff --git a/tsconfig.test.json b/tsconfig.test.json
new file mode 100644
index 0000000..c10ef32
--- /dev/null
+++ b/tsconfig.test.json
@@ -0,0 +1,9 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "rootDir": ".",
+    "outDir": "out-test",
+	"skipLibCheck": true
+  },
+  "include": ["src/**/*.ts", "test/**/*.ts"]
+}
\ No newline at end of file