Claude Code
“A coding AI that works in the terminal” — a worker that opens your files directly when you give instructions
What is Claude Code?
Claude Code is an agentic AI from Anthropic. Instead of just giving answers in a chat window, it opens folders on your computer, reads and edits files, and even runs them. You can hand it document and spreadsheet cleanup without knowing how to code.
- 1It works directly on your computer instead of just giving answers
- 2You can hand off document and Excel cleanup without knowing how to code
- 3Not included in the free plan; available from Pro and up
What sets it apart
These are the differences we found by running the same material through several tools in our training sessions.
It delivers finished work, not just answers
A typical AI tells you “do it this way” and stops there. Hand Claude Code an entire folder and it opens, edits, and creates files directly and leaves finished deliverables behind. Renaming hundreds of scattered files by a rule takes a single instruction.
No coding skills needed
It started as a developer tool, but what it actually does is work with folders and files. You hand off repetitive tasks that used to take a person half a day in Korean, such as pulling only the needed rows from dozens of Excel files and merging them into one sheet, or replacing outdated phrases across documents all at once.
If the terminal feels daunting, use the app
If the black screen is intimidating, use the Claude desktop app. You get the same features without typing a single command. Since this app came out, noticeably fewer people in our training sessions give up at the installation step.
⚖️ The weaknesses are clear, too
It isn’t included in the free plan. Per the official docs, you need a Pro, Max, Team, Enterprise, or Console (API) account to unlock it. It is also a tool that actually edits files on your computer, so it’s safest to keep a copy of any important folder before you start.
💡 In plain EnglishIt’s like handing an intern who gets what you mean the key to your desk drawers. Instruct them well and it’s fast; instruct them badly and the drawers get messy.
The next step in AI training is moving from “asking” to “delegating.” Skip the step where people copy answers over by hand and get finished deliverables instead, and your organization’s view of AI changes.
Same job, different approach
It’s Friday afternoon, and performance files from 12 branch offices have just arrived
The old way
- Open 12 Excel files one by one
- Formats differ slightly, so you match them by hand
- Repeated copy-pasting means a line gets missed
- Totals don’t match, so you recount from scratch
With Claude Code
- Put the 12 files in one folder
- Type 'Merge matching columns into one sheet, even if the formats differ'
- Have it flag missing items and odd values separately
- A person checks only the flagged spots
Common uses
Merge scattered Excel files
It gathers several files with inconsistent formats into one sheet and flags missing values and mismatched totals. A person only checks the flagged spots.
File naming and folder organization
Set a rule such as 'date_client_document type,' and it organizes hundreds of files by that rule. Files that don’t match are set aside.
Search a pile of documents at once
Find every document in a folder that contains a specific phrase, and fix the wording all at once to match the revised policy. Ask for the list first, before any edits.
Who it’s for
Best for
- ✓People who merge same-format files by hand every month
- ✓Professionals who spend a lot of time organizing folders and bulk-editing documents
- ✓You want finished work from AI, not just answers
Better served by other tools
- –People who only want to use free AI
- –People who are fine just asking questions in chat and getting answers
- –Anyone whose company security policy doesn’t allow installing programs on their PC
Can we use it at work?
The questions that adoption leads and security teams ask first.
Note: Which files Claude Code may access and where to require approval before it runs vary by organization, so set a policy before you adopt it.
10-minute quick start
- 1
Sign up for a Claude Pro or higher plan. It doesn’t work on the free plan.
- 2
If the terminal is unfamiliar, install the Claude desktop app first (macOS, Windows, Linux).
- 3
Pick a folder to work in, open it, and write in Korean what you want to do.
- 4
First tell it, “Show me a list of what you will change,” and review it before letting it run.
Copy-and-paste prompts
Replace only the [bracketed] parts, then paste it in.
Read every Excel file in this folder and merge them into one sheet, matching the same items even if the formats differ. Before merging, first show me a table of how the column names differ in each file, and merge only after I confirm. Save the result as [Combined_2026.xlsx].
I want to rename the files in this folder to the [date_client_document type] format. First, just make a list of “current name → new name.” Collect any files that can’t follow the format separately, with the reason. Rename them only after I approve.
Find every place in the documents in this folder that contains [old phrase], and list the file name and sentence for each. Don’t fix anything yet, and flag any spots where changing it would be wrong in context.
Read all the meeting minutes in this folder and build a four-column table of only the unfinished action items: 'Owner · Task · Due date · Source file.' Mark any item with an unclear owner as 'Needs confirmation.'
From now on we’ll work in this folder. Before deleting or overwriting any file, always ask me first. Explain in one line what you want to change and why, and run it only when I reply 'proceed.'
Using it with other tools
Linking two or three tools changes your work more than any single tool does.
Organize materials → report (half a morning)
Applying internal policy revisions (one day)
Before you start
- Always make a copy of important folders before you start. Some changes are hard to undo.
- 'Show me the list of what you'll change first' is safer than 'just fix it.' Get in the habit of checking before you run.
- Keep folders with customer personal data or contract amounts out of its reach.
- It doesn’t open on the free plan. Check your plan before training so no time is wasted.
Pricing: personal use and work use
Plans that individuals pay for are different from plans that organizations contract for by member.
For individual use
Claude Code is not included in the free plan
Includes Claude Code — a good starting plan for beginners
Includes Claude Code · 5x and 20x the usage of Pro
Using it at work
Includes Claude Code · More usage than Pro, with unified member and billing management
Includes Claude Code · 5x the usage of Standard. Claude Code · Claude Cowork
Includes Claude Code · SCIM, audit logs, custom data retention, role-based access control
Checked 21 Sep 2026 · Claude Code is included in Claude plans rather than billed separately (except the free plan). The prices below are what Claude’s pricing page shows when accessed from Korea (US dollars). Whether tax is included depends on your country, so they may differ from US list prices. Prices change without notice — check the official page before you pay. Claude pricing ↗
Agentic AI — the version that does the work itself
Claude Code is an agent in its own right. There are two ways to get started, so if the terminal feels intimidating, you can do the same work in the app.
Claude Code (Terminal)
Hand over a whole folder and it reads files, edits them, and runs commands to produce results. It started as a developer tool, but it works just as well for documents, Excel, and web pages.
- macOS·Linux·WSL —
curl -fsSL https://claude.ai/install.sh | bash - Windows PowerShell —
irm https://claude.ai/install.ps1 | iex(installs without administrator rights) - If you use Homebrew on macOS —
brew install --cask claude-code - After installing, go to the folder you want to work in and type claude
Using the Claude desktop app
You get the same features without the black terminal screen. No typing commands: just pick a folder and give instructions in plain Korean.
- Download the macOS, Windows, or Linux app from the download link in the official documentation and install it.
- Open the app, log in with your Claude account, and choose the folder to work in.
Installation methods and requirements are based on the official documentation. Claude Code official setup docs ↗ · Claude Code product page ↗
Where Claude Code falls short
We don’t just list the positives. Here is what fell short when we used it.
- The black screen takes getting used to
You start from a command window, so if you normally work only with documents and a browser, the very first screen is a hurdle. We walk through the install and login with you at least once.
- You hit the usage limit mid-task
Big tasks use up your allowance quickly, so you can hit the limit just before finishing and have to wait. On a deadline day, you’ll be tempted to reconsider a higher plan.
- Few Korean-language resources
Official guides and on-screen text are mostly in English, so when you get stuck, it’s hard to find Korean explanations by searching. If no one else at your company uses it, there’s no obvious place to ask.
Tools to compare
CodexCoding AI bundled with ChatGPT plans→
CursorAI pair-programming tool for developers→
ReplitBrowser-based AI coding assistant→ClaudeThe most talked-about AI→FAQ
Last updated 22 Sep 2026 · The ratings on this page come from John Kim, CEO of Nanum Consulting, who has used these tools firsthand in training and real work.
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