refactor!: remove DynamicBuffer concept and read_until

.cursor/commands/doc-rebuild.md

@@ -313,21 +313,13 @@ Even `std::byte` imposes a semantic opinion. POSIX uses `void*` for semantic neu
     - Scatter/gather operations (multiple buffers in one syscall)
     - Custom allocators and memory-mapped buffers
     - Integration with any user-defined buffer type
-- **Dynamic Buffers** (`buffers/dynamic.adoc`)
-  - The producer/consumer model
-  - The `DynamicBuffer` concept: `prepare(n)`, `commit(n)`, `data()`, `consume(n)`
-  - Capacity management: `size()`, `max_size()`, `capacity()`
-  - `DynamicBufferParam` for safe coroutine parameter passing
-  - Implementations: `flat_dynamic_buffer`, `circular_dynamic_buffer`, `vector_dynamic_buffer`, `string_dynamic_buffer`
 
 **Reference headers**:
 
 - `<capy/buffers.hpp>`
 - `<capy/buffers/const_buffer.hpp>`, `<capy/buffers/mutable_buffer.hpp>`
 - `<capy/buffers/make_buffer.hpp>`
 - `<capy/buffers/buffer_copy.hpp>`, `<capy/buffers/consuming_buffers.hpp>`
-- `<capy/concept/dynamic_buffer.hpp>`
-- `<capy/flat_dynamic_buffer.hpp>`, `<capy/circular_dynamic_buffer.hpp>`
 
 ### 6. Stream Concepts (Sixth Section)
 
@@ -361,7 +353,6 @@ Generate content based on public API and agent-guide.md. **Key structure**: For
   - **Example**: Compression pipeline — source provides compressed data, sink receives decompressed
 - **Transfer Algorithms** (`streams/algorithms.adoc`)
   - `read(stream, buffers)` — loops `read_some` until full or error
-  - `read(source, dynamic_buffer)` — loops until EOF
   - `write(stream, buffers)` — loops `write_some` until all written
   - `push_to(BufferSource, WriteSink/WriteStream)` — caller-owns-buffers transfer
   - `pull_from(ReadSource/ReadStream, BufferSink)` — callee-owns-buffers transfer
@@ -428,9 +419,6 @@ Generate examples that showcase Capy features. Examples should progress from sim
   - Multiple operations in parallel with `when_all`
   - First-wins pattern with `when_any`
   - Shows: `when_all`, `when_any`, concurrent composition
-- **Custom Dynamic Buffer** (`examples/custom-dynamic-buffer.adoc`)
-  - Implementing `DynamicBuffer` for a custom allocation strategy
-  - Shows: concept modeling, `prepare`/`commit`/`consume` pattern
 - **Echo Server with Corosio** (`examples/echo-server-corosio.adoc`)
   - Complete echo server using Corosio sockets
   - Demonstrates Capy + Corosio integration

doc/modules/ROOT/nav.adoc

@@ -26,7 +26,6 @@
 ** xref:5.buffers/5c.sequences.adoc[Buffer Sequences]
 ** xref:5.buffers/5d.system-io.adoc[System I/O Integration]
 ** xref:5.buffers/5e.algorithms.adoc[Buffer Algorithms]
-** xref:5.buffers/5f.dynamic.adoc[Dynamic Buffers]
 * xref:6.streams/6.intro.adoc[Stream Concepts]
 ** xref:6.streams/6a.overview.adoc[Overview]
 ** xref:6.streams/6b.streams.adoc[Streams (Partial I/O)]
@@ -48,7 +47,6 @@
 ** xref:8.examples/8e.type-erased-echo.adoc[Type-Erased Echo]
 ** xref:8.examples/8f.timeout-cancellation.adoc[Timeout with Cancellation]
 ** xref:8.examples/8g.parallel-fetch.adoc[Parallel Fetch]
-** xref:8.examples/8h.custom-dynamic-buffer.adoc[Custom Dynamic Buffer]
 ** xref:8.examples/8i.echo-server-corosio.adoc[Echo Server with Corosio]
 ** xref:8.examples/8j.stream-pipeline.adoc[Stream Pipeline]
 ** xref:8.examples/8k.strand-serialization.adoc[Strand Serialization]