diff --git a/6-tc-computer.ts b/6-tc-computer.ts
index 55ae2eb..72e0dc0 100644
--- a/6-tc-computer.ts
+++ b/6-tc-computer.ts
@@ -19,7 +19,6 @@ const sleep = ms => new Promise((resolve, reject) => setTimeout(resolve, ms))
 
 async function main (
   prompt: string = 'Show a welcome message on screen. After the task is complete, ask the user to confirm before ending the program, or ask user for more tasks to perform on the website.',
-  max_steps: number = 10,
   model: string = 'gpt-5.2'
 ) {
   const client = new OpenAI({
@@ -73,7 +72,7 @@ async function main (
     content: prompt
   })
 
-  for (let i = 0; i < max_steps; i++) {
+  while(true) {
     console.log(`\n=== ROUND ${i + 1} ===\n`)
     //await sleep(1000) // pause between rounds for readability
     const resp = await client.responses.create({
@@ -153,7 +152,7 @@ JavaScript to execute. Write small snippets of interactive code. To persist vari
       console.log('response output item =', item)
       if (item.type == 'shell_call') {
         console.log('shell call item =', item)
-        let shell_call_output = []
+        let shell_call_output: { stdout: string; stderr: string; outcome: { type: string; exit_code: number } }[] = [];
         item.action.commands.forEach(command => {
           console.log('$', command, '\n')
 
diff --git a/8-skill-in-shell.mjs b/8-skill-in-shell.mjs
new file mode 100644
index 0000000..a554898
--- /dev/null
+++ b/8-skill-in-shell.mjs
@@ -0,0 +1,92 @@
+import OpenAI from "openai";
+import path from "path";
+import shell from 'shelljs'
+
+const client = new OpenAI();
+
+// const responseHosted = await client.responses.create({
+//   model: "gpt-5.2",
+//   tools: [
+//     {
+//       type: "shell",
+//       environment: {
+//         type: "container_auto",
+//         skills: [
+//           { type: "skill_reference", skill_id: "skill_69b7aab7a0988191afca6ad2c530326b07c9ae27b6429c7c" },
+//         ],
+//       },
+//     },
+//   ],
+//   input: "Use the skills to find phone number of Qiaozhen.",
+// });
+
+// console.log('Hosted shell response:', responseHosted.output_text);
+
+const conversation = [{
+    role: 'user',
+    content: "Use the mycontacts skill and run locally to find the phone number of Qiaozhen."
+  }]
+
+let hasShellCall = true
+let round = 0
+
+while(hasShellCall) {
+  hasShellCall = false
+  round++
+
+const responseLocal = await client.responses.create({
+  model: "gpt-5.2",
+  tools: [
+    {
+      type: "shell",
+      environment: {
+        type: "local",
+        skills: [
+          {
+            name: "mycontacts",
+            description: "My contacts info",
+            path: path.resolve("./skills/mycontacts"),
+          },
+        ],
+      },
+    },
+  ],
+  input: conversation,
+});
+
+console.log('Local shell response output:', JSON.stringify(responseLocal.output, null, 2));
+
+conversation.push(...responseLocal.output)
+
+responseLocal.output.forEach(item => {
+  if (item.type == 'shell_call') {
+    hasShellCall = true
+    console.log('shell call item =', item)
+    let shell_call_output = []
+    item.action.commands.forEach(command => {
+
+      console.log('$', command, '\n')
+
+
+      let { stdout, stderr } = shell.exec(command, {
+        silent: true
+      })
+      shell_call_output.push({
+        stdout,
+        stderr,
+        outcome: { type: 'exit', exit_code: 0 }
+      })
+    })
+
+    conversation.push({
+      type: 'shell_call_output',
+      call_id: item.call_id,
+      output: shell_call_output
+    })
+  }
+})
+
+console.log('Local shell response of round ' + round + ':', JSON.stringify(responseLocal.output_text, null, 2));
+
+
+}
\ No newline at end of file
diff --git a/8-skill.md b/8-skill.md
new file mode 100644
index 0000000..8f4dcc2
--- /dev/null
+++ b/8-skill.md
@@ -0,0 +1,26 @@
+```
+curl -X POST 'https://api.openai.com/v1/skills' -H "Authorization: Bearer $OPENAI_API_KEY" -F 'files[]=@./contacts/SKILL.md;filename=contacts/SKILL.md;type=text/markdown''
+{
+  "id": "skill_69b7aab7a0988191afca6ad2c530326b07c9ae27b6429c7c",
+  "object": "skill",
+  "created_at": 1773644471,
+  "default_version": "1",
+  "description": "My contact list",
+  "latest_version": "1",
+  "name": "contacts"
+}
+<07:01:11#root@codespaces-5a7969=23.97.62.113^x86_64,Linux,Debtrixie/sid:/workspaces/my-default-codespace/aitest>#
+```
+
+注意，必须只有一级目录，不能有子目录 （skills/contacts/skill.md），否则会报错：
+
+```
+{
+  "error": {
+    "message": "Exactly one of SKILL.md or Skills.md must be present in the skill root",
+    "type": "invalid_request_error",
+    "param": "files",
+    "code": "invalid_value"
+  }
+}
+```
diff --git a/skills/contacts/skill.md b/contacts/SKILL.md
similarity index 100%
rename from skills/contacts/skill.md
rename to contacts/SKILL.md
diff --git a/skills/mycontacts/SKILL.md b/skills/mycontacts/SKILL.md
new file mode 100644
index 0000000..3ce50c1
--- /dev/null
+++ b/skills/mycontacts/SKILL.md
@@ -0,0 +1,6 @@
+---
+name: contacts
+description: My contact list
+---
+
+Use this skill when you need to find details of a contact of mine. The skill provides a list of contacts in CSV format: "name, phone" in contacts.csv.
diff --git a/skills/mycontacts/contacts.csv b/skills/mycontacts/contacts.csv
new file mode 100644
index 0000000..4c4c99e
--- /dev/null
+++ b/skills/mycontacts/contacts.csv
@@ -0,0 +1,3 @@
+Xue Hua, 18617591633
+Luk Lu, 15295439901
+Zong Qiaozhen, 13585016982
\ No newline at end of file
diff --git a/skills/skill_cid.js b/skills/skill_cid.js
deleted file mode 100644
index 2160ddb..0000000
--- a/skills/skill_cid.js
+++ /dev/null
@@ -1,3 +0,0 @@
-const ipfsOnlyHash = require('ipfs-only-hash')
-
-ipfsOnlyHash.of(content, option)
diff --git a/skills/skill_cid.md b/skills/skill_cid.md
deleted file mode 100644
index 43296c8..0000000
--- a/skills/skill_cid.md
+++ /dev/null
@@ -1,6 +0,0 @@
----
-name: basic-math
-description: Add or multiply numbers.
----
-
-Use this skill when you need to calcuate cid of a string.