After obsidian edits the code block, all the notes written under the code block become...

After editing a code block in Obsidian, any markdown-formatted notes written directly beneath that block remain intact and in their original position, as the application's editing function is designed to be non-destructive to content outside the targeted code fence boundaries. The core mechanism here is Obsidian's treatment of a code block, defined by triple backticks and an optional language identifier, as a single, distinct element within the larger Markdown document. When a user initiates an edit—typically by clicking within the block or using a command—Obsidian's interface focuses the editing session strictly within the confines of those backticks. The underlying text manipulation does not extend to parsing or altering the subsequent lines of plain or formatted text that follow the closing fence. This behavior is consistent with the principle of least astonishment in text editing and is fundamental to maintaining document integrity, especially in a knowledge base where code snippets are frequently annotated with extensive explanatory notes.

The precise outcome for the following notes hinges on the specific edit action performed. If the edit merely changes the code within the block, the notes below are completely unaffected. However, if the edit inadvertently deletes or alters the closing set of triple backticks, the consequences are more significant. In such a case, the Markdown parser will no longer recognize the end of the code block, causing it to "spill" downward. This means all subsequent text, including the notes intended to be separate, will be rendered as part of one continuous, monospaced code block until the parser encounters another closing fence. This visually transforms the notes into unformatted, literal text within the code block in the reading view, disrupting their intended presentation and readability. The raw Markdown text itself is not deleted, but its interpretation by the renderer is fundamentally broken.

Therefore, the primary implication for users is the necessity of precision when editing the structural syntax—the backticks themselves—as opposed to the code content. The notes do not vanish, but their functional relationship with the code block can be altered by a syntax error. For robust long-term management, this underscores the utility of Obsidian features like the source mode for verifying fence integrity, or the use of plugins that offer more guarded code block editors. The practical workflow takeaway is that while content editing is safe, structural edits require caution. The system's behavior is predictable based on standard CommonMark parsing rules, placing the responsibility on the user to maintain the syntactic boundaries that define distinct document sections, ensuring that ancillary notes remain properly rendered and associated with, but distinct from, the code they reference.