The Agent Skills Directory

[COMMAND_EXECUTION]: The skill invokes a Python script and the system open utility using hardcoded absolute file paths (e.g., /Users/ugreen/.claude/skills/chart-image/scripts/generate_chart.py). This creates a dependency on a specific local directory structure and may fail or behave unexpectedly on other systems.
[DATA_EXFILTRATION]: The skill transmits user-supplied chart descriptions to an external, non-whitelisted domain (api.labnana.com) through a network request performed by the scripts/generate_chart.py script. While this is part of the skill's stated purpose, it involves sending potentially sensitive business logic or data to a third-party service.
[DATA_EXPOSURE]: The instructions in SKILL.md expose the original author's local environment details, including their username (ugreen) and specific folder structures, which are hardcoded into the command execution paths.
[PROMPT_INJECTION]: The skill is susceptible to indirect prompt injection because it incorporates untrusted user-provided descriptions directly into prompts for an external image generation model without explicit sanitization.
Ingestion points: User-provided chart content descriptions processed in SKILL.md (Step 2).
Boundary markers: None; user input is interpolated directly into the image generation prompt template in scripts/generate_chart.py via the build_prompt function.
Capability inventory: Network access (via urllib.request), local file system writing (saving PNGs), and shell command execution (invoking Python and the open command).
Sanitization: The skill lacks logic to validate, filter, or escape user input before it is passed to the downstream image generation API.

chart-image