render-env-vars
Configures environment variables, secrets, and env groups on Render. Use when the user needs to set env vars, wire secrets between services, create env groups, use generateValue, set sync: false, or troubleshoot missing or incorrect environment variable values in Blueprints or the Dashboard.
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Content sha256 66d4da240b606f0e… — run codexguild_scan_skills after installing to verify your local copy.
Static analysis is a first line of defense, not a guarantee. Read the source
SKILL.md
Environment Variables on Render
Before inspecting or changing environment variables, secrets, secret files, or environment groups, read references/environment-variables.md for the current documentation, source-of-truth, safety, and mutation workflow.
Blueprint wiring examples and language-specific application notes live under references/.
When to Use This Skill
Use this skill when users want to:
- Add, change, or remove environment variables or secrets
- Understand Dashboard vs Blueprint vs API/MCP flows
- Use environment groups for shared configuration
- Wire
fromDatabase,fromService,fromGroup,sync: false, orgenerateValuein Blueprints - Debug missing vars, secret files, precedence, or platform-injected names
For full Blueprint authoring, pair with render-blueprints. For first-time deploys, render-deploy. For web service behavior and ports, render-web-services.
Blueprint Wiring (Summary)
After reading references/environment-variables.md, use references/wiring-reference.md for task-specific fromDatabase, fromService, and fromGroup examples. Consult render-blueprints for the complete Blueprint workflow.
Platform-Injected Variables
Use the current default-variable reference fetched through references/environment-variables.md instead of relying on a fixed catalog. Language-specific application notes remain in references/platform-variables.md.
Runtime-Specific Defaults
Always bind HTTP servers to 0.0.0.0 and PORT (or the stack’s documented port env) unless using a static site or custom Docker entrypoint.
- When diagnosing a port-binding failure, first establish whether the service uses a native runtime or Docker and inspect its actual start command; the applicable defaults differ.
- For a web service,
PORTdefaults to10000. Prefer reading$PORTin the start command rather than hardcoding that number or settingPORTmerely to match an arbitrary hardcoded port. - Native Python services currently receive
GUNICORN_CMD_ARGSwith a default bind to0.0.0.0:10000. A custom Gunicorn start command should bind to0.0.0.0:$PORTso the process and Render's health checks use the same port.
Common Issues
WEB_CONCURRENCY defaults differ for some older and newer services. When debugging worker counts, compare service creation date and explicit overrides, then confirm current behavior using references/environment-variables.md and references/platform-variables.md.
References
references/environment-variables.md— Current configuration docs, secret handling, groups, platform variables, and mutation safetyreferences/wiring-reference.md— Blueprint cross-resource wiring examples and workspace edge casesreferences/platform-variables.md— Concurrency, native-runtime versus Docker behavior, and application parsing notes
Related Skills
- render-blueprints — Full Blueprint authoring, validation, multi-service layouts
- render-deploy — First deploy, repo requirements, MCP vs YAML
- render-web-services — Ports, health checks, scaling behavior tied to env-driven servers
Current documentation retrieval
Whenever this skill directs you to consult current Render documentation:
- Retrieve the linked Markdown document directly with an available URL-fetching tool or HTTP client, such as
curl. Do not substitute web-search summaries for the document. - Confirm that retrieval succeeded and returned the expected document, then read its contents. Saving a file or printing its path is not sufficient.
- If the request fails or your tool cannot read the Markdown response, open and read the linked HTML version instead.
- If neither version can be retrieved, disclose that the current reference is unavailable and follow any topic-specific fallback in the skill. Use bundled guidance only for stable constraints, and do not guess at changeable platform details.
When a task requires multiple references, apply this workflow to each one and distinguish the documents you verified from those that remain unavailable.
Files
4- SKILL.md
70db7a21f04.6 KB - references/environment-variables.md
9f75cdfe3b4.5 KB - references/platform-variables.md
83762222891.3 KB - references/wiring-reference.md
22da8207194.4 KB
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