---

name: doppler-secret-validation description: Validate and test secrets stored in Doppler. Add API tokens/credentials to Doppler, verify storage and retrieval, test authentication with target services. Use when user mentions "add to Doppler", "store secret", "validate token", or provides API tokens needing secure storage. allowed-tools: Read, Bash

Doppler Secret Validation

Overview

Workflow for securely adding, validating, and testing API tokens and credentials in Doppler secrets management.

When to Use This Skill

Use this skill when:

• User provides API tokens or credentials (PyPI, GitHub, AWS, etc.)
• User mentions "add to Doppler", "store secret", "validate token"
• User wants to test authentication before production use
• User needs to verify secret storage and retrieval

Workflow

Step 1: Test Token Format (Before Adding to Doppler)

Before storing in Doppler, validate token format:

# Check token format, length, prefix
python3 -c "token = 'TOKEN_VALUE'; print(f'Prefix: {token[:20]}...'); print(f'Length: {len(token)}')"

Common token formats:

• PyPI: pypi-... (179 chars)
• GitHub: ghp_... (40+ chars)
• AWS: 20-char access key + 40-char secret

Step 2: Add Secret to Doppler

doppler secrets set SECRET_NAME="value" --project PROJECT --config CONFIG

Example:

doppler secrets set PYPI_TOKEN="pypi-AgEI..." \
  --project claude-config --config prd

Important: CLI doesn't support --note. Add notes via dashboard:

1. https://dashboard.doppler.com
2. Navigate: PROJECT → CONFIG → SECRET_NAME
3. Edit → Add descriptive note

Step 3: Validate Storage

Use the bundled validation script:

cd ${CLAUDE_PLUGIN_ROOT}/skills/doppler-secret-validation
uv run scripts/validate_secret.py \
  --project PROJECT \
  --config CONFIG \
  --secret SECRET_NAME

This validates:

1. Secret exists in Doppler
2. Secret retrieval works
3. Environment injection works via doppler run

Example:

uv run scripts/validate_secret.py \
  --project claude-config \
  --config prd \
  --secret PYPI_TOKEN

Step 4: Test API Authentication

Use the bundled auth test script (adapt test_api_authentication() for specific API):

cd ${CLAUDE_PLUGIN_ROOT}/skills/doppler-secret-validation
doppler run --project PROJECT --config CONFIG -- \
  uv run scripts/test_api_auth.py \
    --secret SECRET_NAME \
    --api-url API_ENDPOINT

Example (PyPI):

doppler run --project claude-config --config prd -- \
  uv run scripts/test_api_auth.py \
    --secret PYPI_TOKEN \
    --api-url https://upload.pypi.org/legacy/

Step 5: Document Usage

After validation, document the usage pattern for the user:

# Pattern 1: Doppler run (recommended)
doppler run --project PROJECT --config CONFIG -- COMMAND

# Pattern 2: Manual export (for troubleshooting)
export SECRET_NAME=$(doppler secrets get SECRET_NAME \
  --project PROJECT --config CONFIG --plain)

Common Patterns

Multiple Configs (dev, stg, prd)

Add secret to multiple environments:

# Production
doppler secrets set TOKEN="prod-value" --project foo --config prd

# Development
doppler secrets set TOKEN="dev-value" --project foo --config dev

Verify Secret Across Configs

for config in dev stg prd; do
  echo "=== $config ==="
  doppler secrets get TOKEN --project foo --config $config --plain | head -c 20
  echo "..."
done

Security Guidelines

1. Never log full secrets: Use ${SECRET:0:20}... masking
2. Prefer doppler run: Scopes secrets to single command
3. Use --plain only for piping: Human-readable view masks secrets
4. Separate configs per environment: dev/stg/prd isolation

Bundled Resources

• scripts/validate_secret.py - Complete validation suite (existence, retrieval, injection)
• scripts/test_api_auth.py - Template for API authentication testing
• references/doppler-patterns.md - Common CLI patterns and examples

Reference

• Doppler docs: https://docs.doppler.com/docs
• CLI install: brew install dopplerhq/cli/doppler
• See doppler-patterns.md for comprehensive patterns