What-if Propose action (rollup delta)

POST

/v1/actions/hospitality.action.propose_action/whatif

curl --request POST \
  --url https://api.aerandil.com/v1/actions/hospitality.action.propose_action/whatif \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{ "branch": "2489E9AD-2EE2-8E00-8EC9-32D5F69181C0", "params": { "confidence": "low", "context_snapshot": {}, "expires_at": "2026-04-15T12:00:00Z", "rationale_text": "example", "requires_confirmation_from": "guest", "subject_kind": "reservation", "subject_ref": "example", "target_action": "example", "target_params_snapshot": {} }, "return_modified": false }'

• Production API

What-if projection of apply_hospitality_action_propose_action — previews the action (execute-and-roll-back) and folds its would-be events into rollup deltas, returning the contribution an apply would make to the daily_rooms fact (ADR / RevPAR / TRevPAR / Occupancy inputs) without persisting anything. Requires the same actions:hospitality.action.propose_action:apply scope as apply. An action that emits no rooms-fact events yields an empty daily_rooms.

Authorizations

• aerandil_oauth

Request Body^required

Media typeapplication/json

object

branch

Apply against an open branch’s overlay view instead of the canonical (main) plane. The action’s writes land in the branch’s copy-on-first-write overlay, its events in the branch’s own stream, and the invocation is journaled for merge-by-replay. Branch writes are action-only, so this is the write-side entry point to a branch (POST /v1/branches forks one).

string format: uuid

params

required

object

confidence

required

Agent confidence in the proposal

string

Allowed values: low medium high

context_snapshot

required

Frozen context the agent saw (bounded excerpts only)

object

key

additional properties

any

expires_at

When an unconfirmed proposal sweeps to `expired` (default 24h)

string format: date-time

rationale_text

required

Human-readable 'why', surfaced at confirmation time

string

requires_confirmation_from

required

Who must confirm before the kernel fires the action

string

Allowed values: guest staff approval_gate

subject_kind

required

The object class the action targets

string

Allowed values: reservation person folio charge stay venue other

subject_ref

required

Id of the subject object

string

target_action

required

The registered action this proposal intends to fire (ApiName form)

string

target_params_snapshot

required

Frozen proposed parameters for the target action

object

key

additional properties

any

return_modified

When true, the response carries modified_objects and modified_links projections — the engine reads the event log inside the same transaction so the projection observes the handler’s own writes.

boolean

Responses

200

Rollup deltas the action would contribute, computed and rolled back.

Media typeapplication/json

object

daily_rooms

required

Per (property, business_date) additive contribution to the rooms rollup.

Array<object>

object

business_date

required

string format: date

currency

ISO 4217, when the fold observed one.

string

property_id

required

string format: uuid

rooms_revenue_net_delta

required

Decimal, net rooms revenue delta.

string

rooms_sold_delta

required

integer format: int64

total_revenue_net_delta

required

Decimal, net total revenue delta.

string

Example^generated

{
  "daily_rooms": [
    {
      "business_date": "2026-04-15",
      "currency": "example",
      "property_id": "2489E9AD-2EE2-8E00-8EC9-32D5F69181C0",
      "rooms_revenue_net_delta": "example",
      "rooms_sold_delta": 1,
      "total_revenue_net_delta": "example"
    }
  ]
}

Headers

Cache-Control

string

Allowed value: no-store

Always no-store — derived, uncommitted data.

422

Validation error — the apply would be rejected.