runtime_vars

Structs

`ActivationEnv`

Activation budget configuration loaded from env vars / Spin variables.

Controls SDK-side retry behavior when calling potentially cold (scaled-to-zero) agents. These values override ActivationConfig defaults in a2a_http_client::activation.

Variables (all optional, defaults applied if absent):

PF_ACTIVATION_MAX_COLD_START_MS / pf_activation_max_cold_start_ms (u64, default: 60000)
PF_ACTIVATION_INITIAL_BACKOFF_MS / pf_activation_initial_backoff_ms (u64, default: 100)
PF_ACTIVATION_MAX_BACKOFF_MS / pf_activation_max_backoff_ms (u64, default: 2000)
PF_ACTIVATION_MAX_RETRIES / pf_activation_max_retries (u32, default: 3)
PF_ACTIVATION_JITTER / pf_activation_jitter (bool, default: true)

Fields

Field	Type	Description
`max_cold_start_ms`	`u64`
`initial_backoff_ms`	`u64`
`max_backoff_ms`	`u64`
`max_retries`	`u32`
`jitter`	`bool`

Methods

`load_optional`

fn load_optional() -> Self

Load activation configuration from env vars / Spin variables. All fields are optional — defaults are applied when missing or unparseable.

`CheckpointEnv`

Fields

Field	Type	Description
`mode`	`CheckpointMode`
`allow_message_response`	`bool`	If true, allow respond.kind=“message” (only meaningful in ResponseControl mode)
`mirror_internal_state_to_task_meta`	`bool`	If true, mirror `internal_state` into Task metadata under `internal_state` key (when present)

Methods

`load_optional`

fn load_optional() -> Self

Optional:

pf_checkpoint_mode | PF_CHECKPOINT_MODE (state_only|task_observable|response_control)
pf_checkpoint_allow_message_response | PF_CHECKPOINT_ALLOW_MESSAGE_RESPONSE (bool)
pf_checkpoint_mirror_internal_state_to_task_meta | PF_CHECKPOINT_MIRROR_INTERNAL_STATE_TO_TASK_META (bool)

Enums

`CheckpointMode`

Variants

Variant	Description
`StateOnly`	Only internal emit/state recording (no task_patch / respond controls)
`TaskObservable`	Allow updating A2A Task state/metadata for polling
`ResponseControl`	Allow choosing response kind (Task vs Message)