diff --git a/package.json b/package.json
index 62f1594..84b8fa2 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
     "author": "Yatao Li",
     "license": "MIT",
     "icon": "Icon512.png",
-    "version": "0.1.58",
+    "version": "0.1.59",
     "publisher": "yatli",
     "repository": {
         "type": "git",
diff --git a/src/FSharpLanguageServer/Program.fs b/src/FSharpLanguageServer/Program.fs
index a8710ea..886b6c1 100644
--- a/src/FSharpLanguageServer/Program.fs
+++ b/src/FSharpLanguageServer/Program.fs
@@ -572,6 +572,7 @@ type Server(client: ILanguageClient) =
                             completionProvider = Some({resolveProvider=true; triggerCharacters=['.']})
                             signatureHelpProvider = Some({triggerCharacters=['('; ',']})
                             documentSymbolProvider = true
+                            codeActionProvider = true
                             codeLensProvider = Some({resolveProvider=true})
                             workspaceSymbolProvider = true
                             definitionProvider = true
@@ -809,8 +810,55 @@ type Server(client: ILanguageClient) =
                                     dprintfn "Error parsing %s: %s" sourceFile.Name e.Message
                 return List.ofSeq(all)
             }
-        member this.CodeActions(p: CodeActionParams): Async<Command list> = TODO()
-        member this.CodeLens(p: CodeLensParams): Async<List<CodeLens>> = 
+        member this.CodeActions(p: CodeActionParams): Async<Command list> = 
+            // TODO match: [fsharp 39: typecheck] [E] The value, namespace, type or module 'Thread' is not defined.
+            //      then:  1. search a reflection-based cache for a matching entry. if found, suggest opening a module/namespace
+            //             2. search for nuget packages
+            //             3. search for workspace symbol. if found, suggest opening a module/namespace
+            // TODO match: [fsharp] [H] Unused declaration
+            //      then:  1. offer refactoring to _
+            //             2. offer refactoring to __
+            // TODO match: [fsharp 39: typecheck] [E] The value or constructor 'fancy' is not defined.
+            //      then:  1. offer create binding
+            //             2. offer create class
+            // TODO match: [fsharp 39: typecheck] [E] The field, constructor or member 'Gah' is not defined.
+            //      then:  1. offer create field
+            //             2. offer create member
+            // TODO match: [fsharp 366: typecheck] [E] No implementation was given for 'IDisposable.Dispose() : unit'. 
+            //             Note that all interface members must be implemented and listed under an appropriate 'interface' declaration, e.g. 'interface ... with member ...'.
+            //      then:  1. offer implement interface
+            // TODO match: [fsharp 855: typecheck] [E] No abstract or interface member was found that corresponds to this override
+            //      then:  1. offer adding it to the interface
+            async {
+                let dbg = sprintf "codeactions: %s %A %A" p.textDocument.uri.LocalPath p.range p.context.diagnostics
+                return [ { title = dbg; command = p.ToString(); arguments = [] } ]
+            }
+
+(*
+            async {
+                let file = FileInfo(p.textDocument.uri.LocalPath)
+                match! checkOpenFile(file, true, false) with 
+                | Error(errors) -> 
+                    dprintfn "Check failed, ignored %d errors" (List.length(errors))
+                    return []
+                | Ok(parseResult, checkResult) -> 
+                    dprintfn "Code action over %s" <| p.ToString()
+
+                    dprintfn "parseResult errors: %A" parseResult.Errors
+                    dprintfn "checkResult errors: %A" checkResult.Errors
+
+                    let errors = 
+                        Array.append parseResult.Errors checkResult.Errors
+                        |> Array.filter (fun e -> FileInfo(e.FileName).FullName = file.FullName)
+                        |> Array.filter (fun e -> e.StartLineAlternate
+
+                    for e in errors do
+                        Uri(e.FileName) = p.textDocument.uri
+
+                    return []
+            }
+*)
+        member this.CodeLens(p: CodeLensParams): Async<CodeLens list> = 
             async {
                 let file = FileInfo(p.textDocument.uri.LocalPath)
                 match projects.FindProjectOptions(file), getOrRead(file) with 
diff --git a/update.ps1 b/update.ps1
index 014cc8b..c8b83cd 100644
--- a/update.ps1
+++ b/update.ps1
@@ -1,4 +1,4 @@
 dotnet build -c Release
-Copy-Item -Force .\src\FSharpLanguageServer\bin\Release\netcoreapp2.2\*.dll ~\AppData\Local\coc\extensions\node_modules\coc-fsharp\out\server\win10-x64\
-Copy-Item -Force .\src\FSharpLanguageServer\bin\Release\netcoreapp2.2\*.json ~\AppData\Local\coc\extensions\node_modules\coc-fsharp\out\server\win10-x64\
+Copy-Item -Force .\src\FSharpLanguageServer\bin\Release\netcoreapp2.2\*.dll ~\AppData\Local\coc\extensions\node_modules\coc-fsharp\out\server\
+Copy-Item -Force .\src\FSharpLanguageServer\bin\Release\netcoreapp2.2\*.json ~\AppData\Local\coc\extensions\node_modules\coc-fsharp\out\server\
 Copy-Item -Force .\package.json ~\AppData\Local\coc\extensions\node_modules\coc-fsharp\package.json
diff --git a/update.sh b/update.sh
index 465fb04..a0b938c 100755
--- a/update.sh
+++ b/update.sh
@@ -1,6 +1,4 @@
 dotnet build -c Release
-cp ./src/FSharpLanguageServer/bin/Release/netcoreapp2.2/*.dll ~/.config/coc/extensions/node_modules/coc-fsharp/out/server/linux-x64/
-cp ./src/FSharpLanguageServer/bin/Release/netcoreapp2.2/*.dll ~/.config/coc/extensions/node_modules/coc-fsharp/out/server/osx.10.11-x64/
-cp ./src/FSharpLanguageServer/bin/Release/netcoreapp2.2/*.json ~/.config/coc/extensions/node_modules/coc-fsharp/out/server/linux-x64/
-cp ./src/FSharpLanguageServer/bin/Release/netcoreapp2.2/*.json ~/.config/coc/extensions/node_modules/coc-fsharp/out/server/osx.10.11-x64/
+cp ./src/FSharpLanguageServer/bin/Release/netcoreapp2.2/*.dll ~/.config/coc/extensions/node_modules/coc-fsharp/out/server/
+cp ./src/FSharpLanguageServer/bin/Release/netcoreapp2.2/*.json ~/.config/coc/extensions/node_modules/coc-fsharp/out/server/
 cp ./package.json ~/.config/coc/extensions/node_modules/coc-fsharp/package.json
diff --git a/update_2.2.sh b/update_2.2.sh
index 675d40f..dfe2e5e 100755
--- a/update_2.2.sh
+++ b/update_2.2.sh
@@ -7,4 +7,4 @@ do
         -r $i src/FSharpLanguageServer -o ./out/server/$i
 done
  
-cp -r ./src/FSharpLanguageServer/out/server/linux-x64/* ~/.config/coc/extensions/node_modules/coc-fsharp/out/server/linux-x64/
+cp -r ./src/FSharpLanguageServer/out/server/linux-x64/* ~/.config/coc/extensions/node_modules/coc-fsharp/out/server/