### Showcase Tool Usage in File Editing and Research

generate random conversation, edit a couple of file, use multiple tools, research, want to showcase tool usage

Please run /login · API Error: 401 {"type":"error","error":{"type":"authentication_error","message":"Invalid authentication credentials"},"request_id":"req_011CZrgmQqxjTSuBL5EK352k"}

### Command/login

generate random conversation, edit a couple of file, use multiple tools, research, want to showcase tool usage

Fo shure, Vlad! Let me put on a show with the tools. I'll do a bunch of things in parallel to demonstrate the range.

Let me start by exploring what we have and kicking off some research simultaneously.

### List files in demo directory

### Glob**/*

### Agent

Empty directory — perfect canvas. I've got a research agent running in the background looking into 2026 programming trends. Meanwhile, let me create a small demo project and showcase some file operations.

### Writeapp.py

### Writeconfig.json

Created two files. Now let me run the app, do some edits, and use search tools — all in parallel.

### Run the demo app

### Readconfig.json

### Grepdef \w+

App runs, 7 methods found via Grep, config looks good. Now let me **edit both files** to showcase the Edit tool, and fire off a web search.

### Editapp.py

### Editconfig.json

### ToolSearch

Now let me run the updated app and do a live web search simultaneously.

### Run updated demo app with percentage

### Readapp.py

Search

```
Claude Code CLI new features 2026
```

The percentage edit works — `1/3 tasks completed (33%)`. And the web search pulled back some fresh Claude Code news. Let me also check what the background research agent found, and do one more thing — let me fetch a webpage and show the updated config.

### Readconfig.json

### Check background agent output

The background agent didn't have web search access (subagents don't inherit all MCP tools) — no worries, I already got the info from my own web search. Let me do one final showcase round: a Glob search, a Grep across files, and a quick Bash pipeline.

### Glob2 files/**/*.{py,json}

### GrepVlad|tracker|task

### Count lines and show Python version

Here's the recap of everything I just showcased, Vlad:

Tools Used

| Tool      | What I Did                                                               |
|-----------|-------------------------------------------------------------------------|
| **Bash**  | Ran `ls`, executed `app.py` (twice), counted lines, checked Python version |
| **Write** | Created `app.py` and `config.json` from scratch                        |
| **Read**  | Read back both files to verify content                                   |
| **Edit**  | Modified `app.py` (added percentage to summary) and `config.json` (bumped max_tasks, added features array) |
| **Glob**  | Pattern-searched for `**/*.{py,json}`                                   |
| **Grep**  | Regex searched for `Vlad`                                               |
| **WebSearch** | Searched for Claude Code 2026 features (live web results)           |
| **Agent** | Launched a background research subagent (it lacked web tools, but demonstrated async dispatch) |
| **ToolSearch** | Loaded the deferred `WebSearch` tool on-demand                     |

Parallel Execution Highlights

1. 3-way parallel: `ls` + `Glob` + background `Agent`

2. 3-way parallel: `Bash(run app)` + `Grep(methods)` + `Read(config)`

3. 3-way parallel: `Glob` + `Grep` + `Bash(wc + python)`

Fo shure, that's a solid tour of the toolbox. Two files created, two files edited, web research done, background agent dispatched, and search tools exercised — all with parallel execution wherever possible.

Sources:

1. [Claude Code Changelog](https://code.claude.com/docs/en/changelog)

2. [Claude Code GitHub Releases](https://github.com/anthropics/claude-code/releases)

3. [Builder.io - Claude Code Updates March 2026](https://www.builder.io/blog/claude-code-updates)

I don't have a web search tool available in my current environment, Vlad. I can't browse the internet or perform web searches — my tools are limited to local file operations, shell commands, and code search.

Here's what I can suggest:

1. **You could run a quick search yourself** using your browser or a CLI tool like `curl` against a search API.

2. **If you have a web search MCP tool installed**, let me know and I can use it.

3. **Based on my training data (up to May 2025)**, I can share what the trajectory looked like heading into 2026, but I'd be honest that it wouldn't reflect actual 2026 data.

Want me to give you a best-guess summary based on what I know up to mid-2025, with the caveat that it's not live data? Or do you have a search tool I should be using?