[schema-coverage] feat: Add schema coverage demo for check-for-updates field

[github-actions]

Schema Coverage Demo

This PR adds a minimal demo workflow that demonstrates usage of the check-for-updates field in the gh-aw frontmatter schema.

Why: The schema feature coverage checker found that check-for-updates was not used in any existing workflow.

What: Adds schema-demos/schema-demo-check-for-updates.md with a valid, minimal demonstration of this field.

Field Description

Control whether the compile-agentic version update check runs in the activation job. When true (default), the activation job downloads config.json from the gh-aw repository and verifies the compiled version is not blocked and meets the minimum supported version. Set to false to disable the check (not allowed in strict mode).

Validation

Attempted make agent-finish, but it was blocked before tests by the Go toolchain download: proxy.golang.org returned Forbidden for golang.org/toolchain@v0.0.1-go1.25.8.linux-amd64.zip. No local ./gh-aw binary was present for compile-only validation.

Warning

Firewall blocked 3 domains

The following domains were blocked by the firewall during workflow execution:

• ab.chatgpt.com
• chatgpt.com
• proxy.golang.org

To allow these domains, add them to the network.allowed list in your workflow frontmatter:

network:
  allowed:
    - defaults
    - "ab.chatgpt.com"
    - "chatgpt.com"
    - "proxy.golang.org"

See Network Configuration for more information.

Generated by Schema Feature Coverage Checker · ◷

• expires on May 11, 2026, 7:36 AM UTC