### Problem/Motivation The configuration source — one of the three input-value sources in the resolution chain (input > config > default) — has never worked, and has no test coverage. Three linked defects in `src/TypedInputsTrait.php`: 1. `getConfigurationValue()` (line ~440) inverts its `$return_typed_data` parameter: TRUE returns the plain value (`->getContextValue()`), FALSE returns the raw `Context` object — backwards from both the name and the docblock. 2. `getExecutableValue()` (line ~125) calls `$this->getConfigurationValue($name)->getValue()`. With the default `$return_typed_data = FALSE` that is a `Context` object, and core `Context` has no `getValue()` method — any tool whose executable value falls back to a configuration value crashes with a fatal undefined-method error. 3. `getConfiguration()` (lines ~58-64) consequently returns `Context` objects instead of plain values, and throws `InputException` for any input that never had a configuration value set — violating the `ConfigurableInterface` contract that `getConfiguration()` always returns a serializable array. ### Steps to reproduce 1. Create a tool with an input. 2. `$tool->setConfigurationValue('name', 'value');` (no input value set). 3. `$tool->execute();` → fatal: `Call to undefined method Drupal\Core\Plugin\Context\Context::getValue()`. ### Proposed resolution - Fix the ternary in `getConfigurationValue()` so the parameter means what it says, and make `getExecutableValue()` retrieve the plain value. - Make `getConfiguration()` return plain values, with NULL/default for unset keys instead of throwing. - Add kernel tests for the config-source fallback: precedence (input > config > default), `getConfiguration()` round-trip, and execution with a config-sourced value. ### API changes `getConfigurationValue()` behavior corrected (current behavior is unusable, so no BC concern in practice). Must land before the RC1 signature freeze. ### AI usage (if applicable) - [x] **AI Assisted Issue:** This issue was generated with AI assistance, but was reviewed and refined by the creator. - [x] **AI Assisted Code:** This code was mainly generated by a human, with AI autocompleting or parts AI generated, but under full human supervision. - [x] **AI Generated Code:** This code was mainly generated by an AI with human guidance, and reviewed, tested, and refined by a human. - [ ] **Vibe Coded:** This code was generated by an AI and has only been functionally tested.