render-migrate-from-heroku
Migrate from Heroku to Render by reading local project files and generating equivalent Render services. Triggers: any mention of migrating from Heroku, moving off Heroku, Heroku to Render migration, or switching from Heroku. Reads Procfile, dependency files, and app config from the local repo. Optionally uses Heroku MCP to enrich with live config vars, add-on details, and dyno sizes. Uses Render MCP or Blueprint YAML to create services.
75
92%
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Critical
Do not install without reviewing
Security
2 findings: 1 critical severity, 1 high severity. Installing this skill is not recommended: please review these findings carefully if you do intend to do so.
E005: Suspicious download URL detected in skill instructions.
What this means
Detected a suspicious URL in the skill instructions that could lead the agent to download and execute malicious scripts or binaries. This includes links to executables from untrusted sources, typosquatting of official packages, URL shorteners that obscure the destination, and personal file hosting services.
Why it was flagged
The raw GitHub raw URL points to an install.sh script (curl | sh), which is a direct executable download and is considered risky because piping an unreviewed shell script from the web can be used to distribute malware; the other listed URLs are documentation, official dashboards, or repository links and appear benign.
W007: Insecure credential handling detected in skill instructions.
What this means
The skill handles credentials insecurely by requiring the agent to include secret values verbatim in its generated output. This exposes credentials in the agent’s context and conversation history, creating a risk of data exfiltration.
Why it was flagged
The skill instructs the agent to accept/paste Heroku config output and connection strings and to call update_environment_variables / use pg_credentials, which requires the LLM to include secret values (env var values, DB URLs, tokens) verbatim in tool calls or generated output.
Low
Low-risk findings.
2 low severity findings. Worth noting, but not necessarily harmful.
W011: Third-party content exposure detected (indirect prompt injection risk).
What this means
The skill exposes the agent to untrusted, user-generated content from public third-party sources, creating a risk of indirect prompt injection. This includes browsing arbitrary URLs, reading social media posts or forum comments, and analyzing content from unknown websites.
Why it was flagged
SKILL.md’s required workflow can ingest outsider-authored free text via “Heroku MCP” tool calls (Step 1b: `get_app_info`, `list_addons`, `ps_list`, etc.) or via user-pasted CLI output when MCP is missing (Step 1b), and that text is then used in the agent’s LLM context to generate migration outputs.
W012: Unverifiable external dependency detected (runtime URL that controls agent).
What this means
The skill fetches instructions or code from an external URL at runtime, and the fetched content directly controls the agent’s prompts or executes code. This dynamic dependency allows the external source to modify the agent’s behavior without any changes to the skill itself.
Why it was flagged
The skill instructs users to run a curl | sh installer at runtime to install the Render CLI (curl -fsSL https://raw.githubusercontent.com/render-oss/cli/main/bin/install.sh | sh), which fetches and executes remote code and is required for the mandatory Blueprint validation step.
- Repository
- openai/plugins
- Commit
11c74d6
- Audited
- Security analysis
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