Changes in version 0.1.3                        

  - str_value() now covers every domain class that has a full-tier
    format() / print() counterpart, completing the compact rendering
    tier: the scalars link, board_option, llm_model_option and plugin;
    the containers blocks, stacks, links, board_options and plugins; and
    the whole board. Each class also gains a utils::str() method that
    thinly displays its str_value(); a container or board renders one
    element per line below a <class[n]> header (#212).
  - New exported generic external_ctrl_vars() (with a block method) and
    predicate has_external_ctrl() provide a public, polymorphic API for
    resolving a board component's external_ctrl declaration into the set
    of externally controllable variable names. This promotes the
    previously internal block_external_ctrl_vars(), letting dependent
    packages dispatch on it (e.g. for dock extensions) instead of
    re-reading the raw external_ctrl attribute (#192).
  - blockr_deser.list() now forwards ... to the dispatched per-class
    method, so callers can thread additional context (e.g. a producer
    version) down to nested deserializers. Previously such arguments
    were silently dropped at the list-dispatch boundary (#186).

                 Changes in version 0.1.2 (2026-04-28)                  

  - The mod slots in update(...) payloads for blocks, links and stacks
    now uniformly expect a delta shape: a named list keyed by entry ID,
    where each entry is a named list of argument values to apply on top
    of the live entry.
      - For blocks, keys must be in block_external_ctrl_vars(blk) —
        non-ctrl-able changes go through rm + add. Ctrl-arg writes hit
        the corresponding reactiveVal in place; block_name (always
        treated as ctrl-able) updates the block's registry attribute.
      - For links and stacks, deltas are merged onto the current entry
        via the new update_link() / update_stack() S3 generics. The
        default methods reconstruct the entry through its stored
        constructor, preserving sub-class attributes. Sub-class owners
        (e.g. dock_stack adding color) only need to register a method
        when their constructor deviates from the convention (#175).
  - block_external_ctrl_vars() always includes "block_name" — every
    block can be renamed through update(...) regardless of its
    external_ctrl opt-in. The default ctrl plugin panel renders a
    block_name field on every block card alongside any opted-in ctrl
    vars. block_supports_external_ctrl() (which would now be TRUE for
    every block) has been removed; the gates that used to call it have
    been simplified accordingly.
  - The default block_server.block now constructs a block_name
    reactiveVal per block and appends it to the vars list passed to the
    ctrl plugin. Two guarded observers keep that reactiveVal in sync
    with the block's block_name attribute on the board (one emits an
    update(mod = ...) when the ctrl plugin writes the rv; the other
    pulls registry-attr changes back into the rv). The ctrl_block_server
    plugin signature is unchanged — block authors and custom ctrl
    plugins see uniform vars reactiveVals.
  - A blockr option attach_default_packages can be set to opt into
    evaluating block expressions with objects from default packages
    directly available.
  - Add ctrl_block() plugin for external block control, allowing blocks
    to be driven programmatically from outside the standard block UI.
  - Add clear_board() for removing all blocks/stacks from a board.
  - Add bbquote() and helpers (., ..) for cleaner code generation via
    bquote()-based quasiquotation.
  - Export custom_plugins() and custom_options() for easier board
    customization.
  - Add block_metadata() for retrieving per-block metadata and attach
    block metadata with defaults to block objects.
  - Export test utilities (blockr_test_exports(), new_mock_session(),
    export_safely()) for use in downstream package tests.

                 Changes in version 0.1.1 (2025-12-06)                  

  - Add Block-level notifications via (optional) expr server return
    value component cond.
  - Export get_board_option_value() to make available current option
    settings via session$UserData.
  - Introduce (optional) dependency on thematic to auto-style plots.
  - Export toolbar_ui() which takes case of the "core" toolbar UI
    component.
  - Utility functions chr_ply() and related, as well as miscellaneous
    utilities such as set_names(), coal(), etc. are now exported for use
    in dependent packages.
  - Export export_code() to make it easier for third-party
    generate_code() plugin implementations.
  - Use evaluate::evaluate() to capture plots.
  - Add new_fixed_block() for applying a fixed (i.e. non-paramtetrized)
    transformation to data input.
  - Board server callbacks are invoked with an additional argument
    session.
  - Export assertion utilities such as is_string(), is_count(), etc.
  - Improved ser/des, which now includes package/constructor information
    for all board, blocks, stacks and options. The corresponding infra
  - Board options now contain UI/server components to provide more
    options for customization. Also blocks can require certain options
    to be available.
  - Introduces block_render_trigger() to control per block class when to
    re-render the block output.
  - Rework of block notifications to provide a reactiveValues() object
    containing notification types a separate components.
  - Auto-ID generation can now be customized with a default provided by
    the ids package (if available).
  - Use the glue package for logging/block notifications; add a
    glue-based text block.
  - New board restore mechanism based on session$reload().
  - Improvements to the registry: block icons and a fixed set of
    categories.

                 Changes in version 0.1.0 (2025-05-20)                  

  - Initial CRAN submission