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Control-plane settings no longer interpolate template tokens. Server listen, API/web URL, storage, object-store, and GitHub App identity fields are now literal strings. Use native overrides such as FABRO_WEB_URL and FABRO_STORAGE_DIR where deployment-time values are required.
A workflow goal can no longer reference itself. A {{ goal }} token inside the graph goal now fails validation instead of passing through as literal text. Prompts may continue to reference the rendered goal.

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MCP transport interpolation

Environment-dependent MCP commands, URLs, headers, and environment values previously carried unresolved tokens into the launched server. fabro run and fabro exec now resolve {{ env.NAME }} at the boundary where the MCP server starts, and a missing variable fails clearly instead of leaking the token as text.