The complete guide to vs code secrets

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What Are VS Code Secrets?

VS Code secrets is the collective term for the credential management features built into Visual Studio Code — specifically the SecretStorage API, which extensions use to store sensitive values like API keys, tokens, and passwords in the operating system's native keychain rather than in plaintext files. At the extension level, VS Code secrets refers to any mechanism that keeps credentials out of your workspace folder and away from version control. At the developer workflow level, it refers to the broader challenge of keeping sensitive values secure inside an IDE that increasingly runs AI-powered tooling with broad filesystem access.

Understanding VS Code secrets is no longer optional. AI coding assistants can read files across your project tree, and the gap between what those tools are allowed to access and what they should access is where credential leaks happen.

Why VS Code Secrets Matters in 2026

AI Assistant Access to Your Workspace

Every AI coding extension — GitHub Copilot, Cursor, Claude Code, and others — runs inside VS Code with access to files you open, terminal output, and in many configurations, the ability to read arbitrary paths you haven't explicitly shared. When an AI assistant proposes code that uses an API key, it often read that key from a file somewhere in your project. The VS Code SecretStorage API exists precisely to prevent this: credentials stored through it are never written to the filesystem in a form the extension can inspect. But most developers don't use it, and most AI tools don't enforce it.

Secret Sprawl Across Project Files

GitGuardian's 2024 State of Secrets Sprawl report found over 12.8 million secrets exposed in public GitHub commits that year — a 28% increase from 2023. That figure only covers public repositories. Internal repositories and local development environments almost certainly carry higher rates because developers treat them as safe, apply less scrutiny, and copy credentials across config files without tracking them. VS Code's workspace settings, launch configurations, and task files are common landing zones for secrets that started as temporary test values and never got cleaned up.

The .gitignore Gap

Many developers assume .gitignore is sufficient protection. It isn't. .gitignore prevents files from being committed, but it doesn't prevent VS Code extensions from reading them, doesn't stop a misconfigured MCP server from passing their contents to a remote model, and does nothing for credentials hardcoded directly in source files. The VS Code secrets problem is partly a storage problem and partly a scope problem — what does your toolchain actually have access to, and does that match what you intended?

How to Approach VS Code Secrets

The right model is defense in layers, not a single control. Start with the SecretStorage API for any extension you write or configure. If you're building a VS Code extension that requires an API key, use context.secrets.store() and context.secrets.get() instead of writing to globalState or a workspace settings file. Keys stored this way go to the OS keychain — macOS Keychain, Windows Credential Store, or libsecret on Linux — and aren't exposed to other processes reading the filesystem.

For your own development workflow, the discipline is simpler: no credentials in workspace files, no credentials in terminal commands that get logged to shell history, no credentials in VS Code task definitions. Use environment variables loaded from a secrets manager or a tool like direnv, and scope what AI assistants can read. If your AI coding tool supports allow/deny rules for file access, configure them before you write a single line of code with it.

At CLaude coe product overview, we document exactly how Claude Code's permission model can be configured to block reads on credential paths — .env files, ~/.aws/credentials, token directories — so the assistant never sees values it doesn't need to complete a task.

Best VS Code Secrets Tools and Solutions

Native OS Keychain via SecretStorage API

The VS Code SecretStorage API is the first-party solution and the most reliable for extension-level secret storage. It abstracts OS keychain differences behind a consistent interface. If you maintain internal VS Code extensions, this should be your default for anything sensitive. The limitation is that it's extension-scoped — the API isn't directly accessible from your application code or test scripts outside VS Code.

Doppler, HashiCorp Vault, and AWS Secrets Manager

For team environments and CI/CD pipelines, dedicated secrets managers beat local solutions. Doppler injects environment variables at runtime without writing them to disk. Vault provides fine-grained access control with audit logs. AWS Secrets Manager integrates tightly with IAM roles, so your dev environment can use short-lived credentials that expire rather than long-lived keys stored in config files. The common pattern is to use one of these at the project level and let VS Code read from environment variables rather than from files.

Git-Level Scanning: gitleaks, truffleHog

Pre-commit hooks running gitleaks or truffleHog catch secrets before they reach version control. These tools scan staged changes for patterns matching known secret formats — AWS access keys, GitHub tokens, Stripe keys, and hundreds of others. They won't prevent your AI assistant from reading a local .env file, but they will stop an accidental commit. Set them up as pre-commit hooks, not just CI checks — catching a leak before push is meaningfully better than catching it after.

CLaude coe for AI-Specific Credential Exposure

Standard secret scanning tools weren't designed for the AI coding assistant threat model. They look for commits, not for files being passed to language models during an active coding session. Reviewing the CLaude coe documentation covers how to configure deny rules specifically for Claude Code — blocking reads on credential files, restricting outbound network access, and auditing what the assistant actually accessed during a session. These controls address the gap that gitignore and pre-commit hooks leave open.

VS Code Secrets Best Practices

Store nothing sensitive in workspace settings, launch.json, or tasks.json — these files are tracked by version control by default in most team setups, and even when excluded, they're readable by every extension running in the workspace. Use the SecretStorage API for extension-level credentials. Use environment variables loaded from a secrets manager for application-level credentials. And don't treat .gitignore as a security boundary.

Audit your AI assistant's file access scope. Most developers accept default configurations when installing an AI coding tool. Those defaults are often broad. Pull the logs or audit transcripts if your tool supports them, and look at what files were actually read during a recent session. You'll often find the assistant accessed files you didn't expect.

Rotate credentials that have been in your development environment for more than a few months. If a key was ever in a .env file that an AI tool could read, treat it as potentially compromised and rotate it. The cost of rotation is low; the cost of not rotating a leaked key is not.

Use short-lived credentials everywhere you can. An AWS session token that expires in one hour is worth far more than a long-lived access key stored in a config file, even if the config file is in .gitignore. IAM roles with instance profiles, GitHub OIDC for CI, and Vault's dynamic secrets all generate credentials that expire before an attacker can do meaningful damage with them.

Frequently Asked Questions

What is VS Code secrets?

VS Code secrets refers to the SecretStorage API built into Visual Studio Code, which lets extensions store sensitive values — API keys, tokens, passwords — in the operating system's native keychain instead of plaintext workspace files. More broadly, the term covers all the practices and tools involved in keeping credentials secure inside a VS Code development environment, including how AI coding assistants interact with those credentials.

Does VS Code SecretStorage protect .env files?

No. The SecretStorage API is for values stored programmatically by extensions using the VS Code API — it has no effect on .env files sitting in your project directory. A .env file is a plaintext file readable by any process, extension, or AI assistant with filesystem access to that path. To protect .env files from AI tools, you need to configure explicit deny rules in your assistant's permission settings, or load secrets from a dedicated secrets manager at runtime so the .env file never exists on disk in the first place.

Can GitHub Copilot read my API keys?

Copilot reads files you open in the editor and uses them as context for completions. If you open a file containing API keys — an .env file, a config file, a test fixture — those values can appear in the context window Copilot uses. Whether Copilot sends that context to GitHub's servers depends on your subscription tier and settings. Enterprise customers can configure content exclusions to prevent specific files from being indexed or sent. Individual users have fewer controls. The safest assumption is that any file you open in VS Code with Copilot active is potentially visible to the completion model.

How do I stop VS Code from exposing secrets to AI tools?

Configure your AI coding assistant's file access permissions before using it. For Claude Code, define allow lists that restrict reads to your source directories and explicit deny rules that block reads on .env, ~/.aws/credentials, ~/.ssh, and similar paths. For Copilot Enterprise, use content exclusions in your organization settings. For any tool, audit what was actually accessed by reviewing session transcripts or logs. The default configuration of most AI coding tools is permissive — you have to actively restrict it.

What is the difference between VS Code secrets and environment variables?

VS Code secrets (via SecretStorage) are stored in the OS keychain and accessible only to the specific extension that stored them, through the VS Code extension API. Environment variables are process-level values inherited by any subprocess and readable by any code running in that process. Environment variables are more portable and easier to use in application code, but they're less isolated — any extension or tool running in the same VS Code terminal session can read them. The practical answer for most development workflows is to use environment variables loaded from a secrets manager (not from a .env file) and SecretStorage for credentials your VS Code extensions themselves need.

What are common VS Code secrets mistakes to avoid?

The most common mistakes: hardcoding credentials in workspace settings or launch.json files that end up in version control; treating .gitignore as a security boundary when AI tools can still read excluded files; accepting default AI assistant configurations without reviewing file access scope; and using long-lived static credentials instead of short-lived dynamically generated ones. A frequently overlooked mistake is copying API keys into terminal commands to test them — that value lands in shell history and in VS Code's terminal buffer, where extensions can read it.