Claude Code runs in the terminal, but it still depends on the right runtime, directory permissions, credential storage, and corporate proxy setup. This guide walks through what to prepare locally and how teams can share configuration safely.
Claude Code is a terminal tool, and once it is installed, a single command is enough to start using it. That is why many people focus almost entirely on networking. In practice, the issues that block people are usually elsewhere: whether the runtime version is correct, whether the project directory is writable, where credentials are stored, how the corporate proxy is routed, and how teammates share one configuration.
Align the runtime environment and dependencies first
Start by checking the official documentation for the currently required runtime version and install what it specifies. Avoid testing with a version that was released only a few days ago. Follow the package manager used by the team; mixing npm, pnpm, and yarn can make lockfiles conflict. git and basic command-line tools are essential because tools like this need to read repositories, execute commands, and run tests. If any part is missing, errors appear immediately.
After installation, verify three things in an empty directory first: that it can read files, modify files, and run tests. Environment problems surface quickly in a small directory, while troubleshooting them inside business code costs much more time.
Project directories, permissions, and boundaries
Do not start it from your home directory or the root of an entire drive. Give it a clearly defined repository root and keep read/write access inside the project. When broader access is genuinely needed, grant it once for that task instead of leaving it open permanently.
Check .gitignore before committing. Locally generated caches, logs, and temporary scripts should stay outside version control. In a team, one of the easiest ways to cause trouble is not a coding mistake but accidentally committing sensitive files created during local debugging.
Where to store keys and credentials
API keys, access tokens, and similar secrets should be provided through environment variables or the operating system's credential manager. Do not put them in source code, configuration files, or script comments. The .env file itself should also be listed in .gitignore; keep only a sample file in the repository that explains what each field means.
Separate personal credentials from team credentials. If several people share one key, it becomes difficult to determine who was using it when something goes wrong. Define a rotation schedule in advance: rotate regularly, rotate on the day someone leaves, and rotate immediately when a leak is suspected. If a credential is exposed, revoke it first and investigate afterward; do not delete logs first.
Working with corporate proxies and network environments
On corporate networks, the main difficulty with tools like this is often not basic connectivity but proxies and certificates. If an enterprise gateway performs TLS interception, the tool may fail because it does not trust the certificate chain. In that case, ask IT for the internal root certificate and install it in the correct trust store instead of temporarily disabling certificate verification.
The login flow opens a browser, so the command line and browser should ideally use the same egress path. That path should also be fixed, stable, and controllable. If any of those qualities is missing, you are more likely to see repeated logins or CAPTCHA checks. Frequently switching nodes is more likely to trigger verification than keeping one node fixed, because the latter looks more like a long-term user session.
To verify whether the egress path is actually in effect, use the command line with the proxy option to query an IP service once.
curl -x http://127.0.0.1:7897 https://ipinfo.io
The returned address should be the one you expect. It is also best for the browser's time zone and language to match the egress region; avoid a setup where one suggests North America while the other is set to UTC+8.
How teams can share configuration
Share the structure, not the secrets. Put working-directory conventions, proxy routing rules, the allowed command scope, and code-style constraints into a version-controlled configuration file in the repository. Each person should inject their own secrets locally through environment variables.
New team members can then follow the documentation and get running without asking colleagues one by one. If the team uses multiple identities or environments at the same time, PurpleMark can also keep the browser state for each environment fixed, so it remains possible to trace which environment a particular login occurred in.
Wrap-up
When tools like this fail, the cause is often not a bug in the tool itself but prerequisites that were never aligned. Runtime and dependencies, directory permissions, credential storage, proxy egress, and shared configuration are the five areas worth sorting out in a small project first. Doing that upfront can save repeated troubleshooting later.
