nopeek

nopeek — Secret Safety for Claude Code

Secure proxy between Claude Code and your secrets. Claude knows key names, never key values.

Why

Every Bash tool output is sent to Anthropic's API and retained 30+ days. If a CLI prints a token, that token is stored on Anthropic's servers. nopeek prevents this.

Quick Start

All nopeek commands are safe inside Claude Code — they never output secret values, only key names.

1. Scan and migrate CLIs

npx nopeek init

Detects installed cloud CLIs (aws, hcloud, kubectl, etc.), checks their auth config, and migrates to profile-based auth where needed.

2. Load .env secrets

npx nopeek load .env
npx nopeek load .env --only DATABASE_URL,API_KEY

Injects values into the session via CLAUDE_ENV_FILE (when available) or outputs a source command. Only key names appear in output — never values.

3. Store arbitrary keys

npx nopeek set MY_API_KEY --from-env
npx nopeek set STRIPE_KEY --value "sk_live_..."

Stored keys auto-load on every Claude Code session via the SessionStart hook.

4. Verify

npx nopeek status
npx nopeek list

What the hooks do

Hook	Event	Purpose
session-load.sh	SessionStart	Loads stored keys + CLI profiles into CLAUDE_ENV_FILE
redact-output.sh	PreToolUse(Bash)	Wraps cloud CLI output through secret pattern redaction

Limitations

• Redaction is best-effort. Regex patterns catch known formats (AWS keys, bearer tokens, Stripe keys, private key headers, connection strings) but cannot catch every possible secret.
• This is a safety net, not a guarantee. The primary defense is loading secrets via CLAUDE_ENV_FILE so they never appear in output at all.
• No PostToolUse output redaction. Claude Code doesn't support modifying Bash output after execution. The PreToolUse hook rewrites commands to filter output before Claude sees it.
• Commands with pipes or redirections are not wrapped. The redaction hook skips commands containing |, >, or < to avoid breaking complex command semantics.
• Requires jq. The redact hook will not fire without jq installed.
• Waiting on anthropics/claude-code#39882 — PreApiCall/PostApiCall hooks would enable full payload redaction before data leaves your machine.

Audit .env files

npx nopeek audit

Scans current directory for .env files containing secrets and checks .gitignore coverage.

Troubleshooting

Keys not loading on session start:

• Check npx nopeek status — are keys stored?
• Verify the plugin is installed: /plugin list
• Try /reload-plugins

Cloud CLI still showing secrets:

• The redaction hook only fires for commands starting with known CLI names (aws, hcloud, kubectl, doctl, gcloud, az, terraform)
• Commands with pipes or redirections are skipped to avoid breaking semantics
• Run npx nopeek load .env to make secrets available as env vars, then use $VAR_NAME in commands