Changes in version 1.4.12                        

  - Exported a small, stable "extension API" so that companion provider
    packages (such as aisdk.providers) can build on the core HTTP and
    image-handling machinery without reaching into the aisdk namespace:
    api_endpoint_urls(), post_to_api(), post_multipart_to_api(),
    finalize_image_artifacts(), materialize_image_upload(),
    normalize_image_input_for_json() and
    normalize_image_input_to_url_like(). These are documented with
    \keyword{internal} (kept out of the main help index) and are
    intended for package authors rather than end users; their behaviour
    is unchanged.
  - When a model ID names a provider that lives in a companion package
    (e.g. deepseek:..., kimi:...) but that package is not installed, the
    provider registry now offers to install it in interactive sessions
    and, in non-interactive sessions, fails with a clear hint naming the
    package to install. Resolution of already-available providers is
    unchanged.

                 Changes in version 1.4.11 (2026-05-30)                 

  - Removed wall-clock elapsed-time assertions from two r_eval
    rejection/abort tests in tests/testthat/test-r-introspect-tools.R.
    The tests now rely solely on the structured output (the REJECTED
    status and the subprocess refusal marker), which already
    distinguishes an immediate rejection from a timeout wait. The
    previous expect_lt(elapsed, ...) thresholds were unreliable on
    loaded CRAN build machines (a library(aisdk) subprocess start alone
    exceeded the 5s bound on the Fedora check farm) and are exactly the
    kind of timing test that "Writing R Extensions" advises against.
  - Removed stray Rplots*.pdf plot artifacts that had been committed
    under tests/testthat/.

                 Changes in version 1.4.10 (2026-05-29)                 

  - Skip r_eval process-tree-reaping test on CRAN (it polls pgrep for sh
    + sleep grandchildren that the Linux kernel may reparent to PID 1
    before processx::kill_tree() can finish; the TIMEOUT user-visible
    behaviour is exercised by a separate test).

                        Changes in version 1.4.9                        

  - Layered architecture (Specification, Utilities, Providers, Core)
    with R6 classes for Agent, Tool, Skill, Computer, and Telemetry.
  - Unified interface to multiple AI model providers (e.g. 'OpenAI',
    'Anthropic'), with request interception, robust error handling, and
    exponential retry delays.
  - Local small language model inference, distributed 'MCP' ecosystem,
    multi-agent orchestration, progressive knowledge loading through
    skills, and a global skill store for sharing AI capabilities.
  - Optional companion packages (aisdk.channels for Feishu/messaging
    integration, aisdk.skills for skill-forge tooling) are detected at
    runtime and degrade gracefully when not installed.