pexoai-agent security assessment v51

Evaluated 534 static analysis findings across 13 files (2110 lines). All 349 external_command detections are false positives: standard bash $(...) substitutions in legitimate shell scripts and backtick code blocks in markdown documentation. All 27 network detections reference the documented pexo.ai API and service URLs. All 79 filesystem detections involve the expected config directory (~/.pexo/config) and temp storage (~/.pexo/tmp), both documented in the skill's setup guide. All 25 env_access detections reference PEXO_API_KEY and PEXO_BASE_URL, which are required and documented configuration variables. No prompt injection, data exfiltration, or malicious intent found. Risk level set to medium due to the inherent credential handling and network communication required by the skill's purpose — not due to confirmed threats.