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An improvement pass completed, failed or was cancelled

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POST
webhook-id
required
string

The event id; the same on every retry. Deduplicate on it.

webhook-timestamp
required
string
/^[0-9]+$/

Unix seconds when the request was signed. Reject requests far from your clock.

webhook-signature
required
string

v1,<base64 HMAC-SHA256 of "{webhook-id}.{webhook-timestamp}.{body}"> under the endpoint’s secret; space-separated when two secrets sign during a rotation.

Media typeapplication/json

An improvement pass ended (completed, failed or cancelled): one a person started, or one an improve schedule did. Its outcome names the proposal it wrote, if it wrote one.

object
id
required

Event id, also sent as the webhook-id header; the same on every retry.

string
type
required
string
Allowed value: improvement-pass.finished
createdAt
required
string format: date-time
data
required
object
pass
required

The pass, as GET /v1/improvement-passes/{passId} shows it.

object
id
required
string format: uuid
agentId
required
string
fromVersion
required

The version whose settings it tunes.

string
scope
required
One of: discriminator: kind

The agent’s default for the whole tenant.

object
kind
required
string
Allowed values: tenant
suiteId
required

The test set it searches and proves on.

string
tiers
required
Array<string>
Allowed values: settings prompt
objective
required
string
Allowed values: weightedYesShare weightedPrecisionAtK
classWeights

Which judgments its comparisons count. Absent from older servers: restricted-only.

string
Allowed values: as-recorded restricted-only
model

For a prompt pass: the provider and model that drafts the templates.

object
providerId
required
string
model
required
string
candidates

For a prompt pass: how many templates it drafts.

integer
>= 1 <= 5
budget
required
object
maxCostUsd
required

The most the pass’s comparisons may cost, in US dollars.

number
> 0 <= 100
maxCandidates
required

The most candidates it compares.

integer
>= 1 <= 200
requestedBy
required
string
status
required
string
Allowed values: running completed failed cancelled
candidatesEvaluated
required
integer
costUsd
required

What its comparisons have cost so far (US dollars).

string
outcome

What a finished pass found. proposed: its best candidate beat the current values on the test set’s hold-out part, so it wrote an improvement proposal (proposalId) for a reviewer to decide. nothing-found: no candidate beat them by more than the noise, or within the budget (reason; holdOut has the best candidate’s numbers when one got that far). failed: message says why.

object
kind
required
string
Allowed values: proposed nothing-found failed
proposalId
string format: uuid
reason
string
holdOut
object
baseline
required
number | null
candidate
required
number | null
delta
required
number | null
spread
number
message
string
cancelReason

Why a cancelled pass stopped when nobody cancelled it: a comparison’s eval run was cancelled for it (that run’s cancelReason, e.g. project-suspended). It wrote no proposal. Absent when it was cancelled.

string
comparisons

Its comparisons so far, each an eval run to open: reference (the version as it is, on the search part; for a model-settings change also on the hold-out part, what its proof is held to), each candidate (the block and the values it changed, on the search part), and the proof (the proposal, on the hold-out part). Absent from older servers.

Array<object>
object
evalRunId
string format: uuid
role
required
string
Allowed values: reference candidate proof
part
required
string
Allowed values: search hold-out
blockId
string
changed
object
key
additional properties
any
score
number | null
failed
string
refused

For a drafted template that was never compared: why the check refused it (what it reads or names that the agent doesn’t have, or its size).

Array<object>
object
path
required
string
message
required
string
hypothesis

For a drafted template: what the drafter meant it to change.

string
trigger

The improve schedule and fire that started it (GET /v1/schedules/{triggerId}/fires); absent for a pass a person started.

object
triggerId
required
string
fireId
required
string
createdAt
required
string format: date-time
updatedAt
required
string format: date-time
finishedAt
string format: date-time

Received. Any other answer, or none within 10 seconds, is retried.