> For the complete documentation index, see [llms.txt](https://sonic-ai-works.gitbook.io/sonic-networks-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sonic-ai-works.gitbook.io/sonic-networks-docs/changelog/2026-09-01-documentation-and-architecture-foundation.md). # 2026-09-01 — Documentation & architecture foundation ## Documentation * Established a SONIC-specific GitBook information architecture across Home, Documentation, API Reference, Changelog, and Help Center. * Added brand/UI working tokens with explicit approval caveat. * Added system architecture and publishing governance references. ## Billing & subscriptions * Documented immutable subscription price snapshots including public price id/version, atomic amount, currency, decimals, interval, tax behavior, catalog version, and integrity hash. * Documented append-only catalog versioning and historical rendering rules. ## Generation & credits * Connected generation operations to `reserve → settle/refund` lifecycle documentation. * Added tenant-scoped idempotency requirements. * Documented partial/out-of-order Suno callback merging and terminal-result protection. ## Security * Added stronger public-URL validation requirements for Upload & Cover. * Clarified wallet connection vs transaction authorization and transaction-intent validation. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://sonic-ai-works.gitbook.io/sonic-networks-docs/changelog/2026-09-01-documentation-and-architecture-foundation.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.