# portableScheduleStep

A portable schedule step record carrying ordinal, nodeName, requestedDevice, resolvedDevice, fallbackUsed, and related state.

Last updated: 2026-09-09

Package: compute.graph | Status: source-declared

Tags: compute, compute.graph, cpu, graph, method, source-example, thing, yeho

Describe compute work as an explicit graph with package-owned validation and scheduling metadata.

```yh
external thing portableScheduleStep
```

- int ordinal: Stores ordinal as int.
- text nodeName: Stores node name as text.
- text requestedDevice: Stores requested device as text.
- text resolvedDevice: Stores resolved device as text.
- bool fallbackUsed: Stores fallback used as bool.
- bool fusedWithPrevious: Stores fused with previous as bool.
- text cacheDecision: Stores cache decision as text.
- text specializationDecision: Stores specialization decision as text.
- text transferDecision: Stores transfer decision as text.
- portableScheduleStep(int ordinal, text nodeName, text requestedDevice, text resolvedDevice, bool fallbackUsed, bool fusedWithPrevious, text cacheDecision, text specializationDecision, text transferDecision): Portable schedule step.
- Describe() returns text: Describe.

## Use portableScheduleStep

A complete small caller. Values are illustrative; check the returned result and package requirements before connecting live resources.

Verification: type checked

```yh
using compute.graph

// Describe compute work as an explicit graph with package-owned validation and scheduling metadata.
portableScheduleStep sample = portableScheduleStep(1, "node Name", "requested Device", "resolved Device", true, true, "cache Decision", "specialization Decision", "transfer Decision")
Console.Log(Text.From(sample.ordinal))

```

Save this beside start.yh as project.mech:

```toml
manifestVersion = "2"
package = "api.example.compute_graph__portableschedulestep"
version = "0.1.0"
languageEdition = "yeho-core-2026.1"

[app]
kind = "headless"

[[dependencies]]
package = "compute.buffer"
version = "0.1.0"
path = "../../../yeho/packages/compute/buffer"

[[dependencies]]
package = "compute.device"
version = "0.1.0"
path = "../../../yeho/packages/compute/device"

[[dependencies]]
package = "compute.graph"
version = "0.1.0"
path = "../../../yeho/packages/compute/graph"

[[dependencies]]
package = "compute.kernels"
version = "0.1.0"
path = "../../../yeho/packages/compute/kernels"

[[dependencies]]
package = "compute.tensor"
version = "0.1.0"
path = "../../../yeho/packages/compute/tensor"

[[dependencies]]
package = "console"
version = "0.1.0"
path = "../../../yeho/packages/console"

[[dependencies]]
package = "diagnostics"
version = "0.1.0"
path = "../../../yeho/packages/diagnostics"

```

Extract the example archive beside the yeho and dolphin checkouts. This example requires those source dependencies and a current developer compiler.

```sh
./yeho/build/dolphin-metal/yehoc ./api-examples/compute.graph--portableScheduleStep/usage --backend cpu-oracle -o /tmp/yeho-example
/tmp/yeho-example
```


## portableScheduleStep.Describe

A complete caller for this public method. Sample inputs are illustrative; native resources require their owning lifecycle.

Verification: type checked

```yh
using compute.graph

// Describe.
portableScheduleStep instance = portableScheduleStep(1, "node Name", "requested Device", "resolved Device", true, true, "cache Decision", "specialization Decision", "transfer Decision")
text result = instance.Describe()
Console.Log(Text.From(result))

```

Save this beside start.yh as project.mech:

```toml
manifestVersion = "2"
package = "api.example.compute_graph__portableschedulestep"
version = "0.1.0"
languageEdition = "yeho-core-2026.1"

[app]
kind = "headless"

[[dependencies]]
package = "compute.buffer"
version = "0.1.0"
path = "../../../yeho/packages/compute/buffer"

[[dependencies]]
package = "compute.device"
version = "0.1.0"
path = "../../../yeho/packages/compute/device"

[[dependencies]]
package = "compute.graph"
version = "0.1.0"
path = "../../../yeho/packages/compute/graph"

[[dependencies]]
package = "compute.kernels"
version = "0.1.0"
path = "../../../yeho/packages/compute/kernels"

[[dependencies]]
package = "compute.tensor"
version = "0.1.0"
path = "../../../yeho/packages/compute/tensor"

[[dependencies]]
package = "console"
version = "0.1.0"
path = "../../../yeho/packages/console"

[[dependencies]]
package = "diagnostics"
version = "0.1.0"
path = "../../../yeho/packages/diagnostics"

```

Extract the example archive beside the yeho and dolphin checkouts. This example requires those source dependencies and a current developer compiler.

```sh
./yeho/build/dolphin-metal/yehoc ./api-examples/compute.graph--portableScheduleStep/method-Describe-10 --backend cpu-oracle -o /tmp/yeho-example
/tmp/yeho-example
```


Package presence and a declaration do not establish support on every host. Host services need their platform and lifecycle setup.

Source: yeho/packages/compute/graph/portable_contract.yh

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