Babysitter ev-certificate-validator

Validate EV code signing certificate chain and timestamp for Windows SmartScreen

install

source · Clone the upstream repo

git clone https://github.com/a5c-ai/babysitter

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/a5c-ai/babysitter "$T" && mkdir -p ~/.claude/skills && cp -r "$T/library/specializations/desktop-development/skills/ev-certificate-validator" ~/.claude/skills/a5c-ai-babysitter-ev-certificate-validator && rm -rf "$T"

manifest: library/specializations/desktop-development/skills/ev-certificate-validator/SKILL.md

ev-certificate-validator

Validate EV (Extended Validation) code signing certificate chain and timestamp to ensure Windows SmartScreen compatibility.

Capabilities

Verify certificate chain validity
Check timestamp presence and validity
Validate EV certificate attributes
Check certificate expiration
Verify signature algorithm strength
Validate publisher information

Input Schema

{
  "type": "object",
  "properties": {
    "signedFile": { "type": "string" },
    "checkSmartScreen": { "type": "boolean", "default": true }
  },
  "required": ["signedFile"]
}

Validation Commands

# Verify signature with chain
signtool verify /pa /all /v signed.exe

# Check certificate details
certutil -dump signed.exe

# Verify timestamp
signtool verify /pa /tw signed.exe

Related Skills

```
windows-authenticode-signer
```
```
code-signing-setup
```
process