Patterns

BackPressEvent -> HandledIndicator

Dispatch a back-button event down a registration tree to let the deepest active handler intercept the action.

Tuple2<NavigationStack, NavigationAction> -> NavigationStack

Compute the next navigation configuration stack by applying a transition function to the current stack and a navigation command.

InstanceKey -> RetainedInstance

Retrieve a cached object instance by key from a registry that survives host component destruction and recreation.

ParentLifecycleEvent -> ChildLifecycleEvent

Propagate lifecycle state changes from a parent container down to active nested child contexts.

String -> TriggerQuery

Monitor cursor text entries for special prefix characters to expose a query event and generate atomic, immutable token elements.

RichTextState -> RichTextState

Record sequential snapshots of rich text spans and paragraph structures to support rich undo/redo operations.

ResourceURL -> Flow<LoadState<Resource>>

Fetch remote resources asynchronously over network channels and emit progressive loading, success, and error states as a reactive stream.

(Intent, ActivityResultCallback) -> Void

Route Activity results to inline callbacks by automatically generating unique request codes and matching them on intercept.

CurrentState -> OptimalControlInputs

Iterate state predictions and project outputs onto control constraints using the alternating direction method of multipliers (ADMM) to resolve bound constraints via cheap, element-wise clipping.

SystemDynamicsAndWeights -> PreFactoredCholeskyMatrices

Pre-factor and cache the quadratic program's KKT matrix offline to bypass runtime matrix inversion on-device.

(QPParameters, ControlBounds) -> BoundedOptimalControls

Solve quadratic programming problems containing upper and lower bounds on control inputs while supporting backpropagation through the solution step.

(NonlinearDynamics, CostFunction, InitialState) -> OptimizedTrajectory

Optimize non-linear control trajectories by iteratively linearizing non-linear system dynamics and quadratizing cost functions around a nominal trajectory, then solving the resulting linear-quadratic approximation.

(DynamicsMatrices, CostMatrices, InitialState) -> ControlTrajectory

Compute the optimal control trajectory for a linear-quadratic system and analytically backpropagate gradients of the trajectory with respect to the dynamics and cost matrices.

EnvironmentVariables -> ConfigurationSettings

Scan and override hierarchical application configuration settings using structured environment variables containing a specific double-underscore delimiter.

MultiChannelNonInterleavedBuffer -> MultiChannelNonInterleavedBuffer

Process multi-channel streams in fixed-size, non-interleaved flat arrays optimized for aligned SIMD vector operations.

StaticPipeline -> DynamicInterface

Encapsulate compile-time type-parameterized processing nodes into a dynamically dispatched, uniform interface to allow runtime reconfigurability.

MDLSchema -> MCPServerCapability

Exposes semantic models, metrics, and relationships to external AI engines via the Model Context Protocol.

ToolCall -> ToolResult

Gate agent tool calls through configurable execution policies (such as YOLO, planning, or auto-accept) to decide whether to run, prompt, or dry-run a task.

TokenUsage -> CostMetrics

Calculate monetary cost for an LLM interaction based on input/output token metrics and model-specific pricing.

(TechnicalQuery, LocalCodeContext) -> GroundedContext

Augment code intelligence context by querying search engines for external technical documentation and merging it with local AST chunks.

(SearchQuery, GitCommitRange) -> RankedList<CodeContext>

Merge and re-rank vector search results from a persistent codebase database and a dynamic ephemeral index built from git diffs.

PipelineOutputList & GroundTruthDataset -> WeightedValidationMetrics

Compute precision, recall, and a tier-weighted composite score of pipeline outputs against multi-tiered ground truth data.