The Agent Skills Directory

Command Execution (HIGH): The skill uses the !date pattern. In many agent-skill runtimes and templating engines, this syntax triggers shell command execution. This allows for arbitrary command execution if the platform interprets these tags without strict sanitization.
Data Exposure (MEDIUM): The skill references a template at @~/.config/opencode/templates/thinking-session.md. Accessing the ~/.config directory is a sensitive operation as it often contains application secrets, tokens, and configuration data.
Indirect Prompt Injection (HIGH): The skill takes arbitrary user input via $ARGUMENTS and processes it using a deep thinking protocol that concludes with a file-write operation.
Ingestion points: $ARGUMENTS variable in SKILL.md.
Boundary markers: Absent. The user input is directly interpolated at the end of the instructions.
Capability inventory: obsidian_append_content (file modification/creation), background_task (agent orchestration).
Sanitization: None detected. Malicious instructions in $ARGUMENTS could influence the thinking protocol to exfiltrate data or modify unrelated Obsidian files.

think