docs(markdown): record native selection and image limitations

CLAUDE.md

@@ -50,6 +50,7 @@ At the start of non-trivial work, list `docs/` and skim anything relevant to the
 | [docs/terminal-performance.md](docs/terminal-performance.md)         | Terminal latency pipeline, coalescing/backpressure invariants, benchmark + perf spec usage                                     |
 | [docs/agent-stream-performance.md](docs/agent-stream-performance.md) | Assistant text pipeline — coalescing window, paced reveal, why arrival lumps are smoothed at render                            |
 | [docs/markdown-renderer.md](docs/markdown-renderer.md)               | Shared Markdown engine, native selection, links, images and library constraints                                                |
+| [docs/native-text-selection.md](docs/native-text-selection.md)       | Native diagram grouping, selection boundaries and leading inline image limitations                                             |
 | [docs/file-observation.md](docs/file-observation.md)                 | Recursive watcher ownership, Linux constraints, teardown invariants, and Parcel comparison                                     |
 | [docs/testing.md](docs/testing.md)                                   | TDD workflow, determinism, real dependencies over mocks, test organization                                                     |
 | [docs/qa.md](docs/qa.md)                                             | QA evidence bar for pull requests — platform matrix, version drift, performance, UI proof                                      |

docs/markdown-renderer.md

@@ -16,7 +16,7 @@ The pinned nightly has the same React Native package and core source trees as up
 
 Math and video are disabled. Task lists and admonitions are enabled; task checkboxes are read-only. Source adaptation spaces adjacent empty GFM table delimiters before escaping prose spoiler delimiters and decodes entity text before the engine can discard it. Code spans and fences keep their literal source. Comment HTML is normalized to Markdown before parsing; details show their summary and body expanded.
 
-Mermaid fences use the existing isolated diagram runtime and fullscreen viewer. Web dispatches them through the library’s code-block override. Native has no block-renderer hook, so the renderer extracts only Mermaid fences and places the existing WebView host between library-rendered segments. This is the only block exception; selection stops at a diagram boundary. Streaming keeps the last valid diagram visible while the next revision renders.
+Mermaid fences use the existing isolated diagram runtime and fullscreen viewer. Web dispatches them through the library’s code-block override. Native has no block-renderer hook, so the renderer extracts only Mermaid fences and places the existing WebView host between library-rendered segments. This is the only block exception; see [native selection limitations](native-text-selection.md) for diagram grouping and leading inline images. Streaming keeps the last valid diagram visible while the next revision renders.
 
 Native code blocks use the library's copy control and compiled grammars. Web code blocks use `HighlightedCodeBlock` through the library's `renderers.codeBlock` override. The patch also preserves web list numbering and link titles, marks pending parses with `aria-busy` so Find waits for rendered text, and carries link syntax through native and web tap events. The package patch is tracked by [upstream PR #997](https://github.com/software-mansion/enriched-markdown/pull/997); remove the patch when the pinned release includes it.
 

docs/native-text-selection.md

@@ -0,0 +1,15 @@
+# Native text selection
+
+Keep assistant prose in one native text view so selection crosses paragraphs, headings and lists. The shared [Markdown renderer](markdown-renderer.md) owns that view.
+
+## Diagrams in lists and quotes
+
+Selection stops at a Mermaid diagram. Native extracts Mermaid fences into separate views because the library exposes no native block renderer override. A diagram inside a list or quote therefore appears outside that container, and its following prose starts a separate Markdown fragment.
+
+Reopening a list marker or quote prefix on the following fragment cannot place the diagram inside the original container or continue its quote rule. Preserving the group requires a native block renderer hook or a host that owns the whole group. Keep native diagrams at the top level until that exists; nested grouping remains a known limitation.
+
+## Leading inline images
+
+Native image decoders do not support SVG badges, so the renderer shows their alt text. Images that fail decoding also show alt text.
+
+The native library classifies an image from the text preceding it. A raster image at the start of a paragraph uses block sizing even when text follows; the inline size setting only affects images the library recognizes as inline. Correcting that classification requires a native library change and new app builds. JavaScript-only updates retain that classification until native app builds include a library fix.