Declared contract migration route
Choose a bounded minimum-cost route through a supplied directed version-migration manifest, respecting explicit lossy-step, cost and step limits. Version IDs are opaque; no migrations run and declared compatibility is not independently verified.
workflow-assurance · Operation ID: contract-version-route
Choose this operation when
- Plan a declared contract migration path between agent versions
- Find a lowest-cost adapter chain without allowing declared data loss
Outside this profile
- Live negotiation, message delivery, queue consumption, remote pagination, artifact fetching or migration execution
- Authentication, signed provenance, authorization, schema compatibility proofs, or exactly-once guarantees
- Inferring absent versions, server state, missing history, semantic equivalence, or market uniqueness
Exact release references
Static JSON contract · Markdown reference · Fixed example response
Complete input schema
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "object",
"properties": {
"contract": {
"type": "string",
"minLength": 1,
"maxLength": 100
},
"sourceVersion": {
"type": "string",
"minLength": 1,
"maxLength": 100
},
"targetVersions": {
"minItems": 1,
"maxItems": 32,
"type": "array",
"items": {
"type": "string",
"minLength": 1,
"maxLength": 100
}
},
"migrations": {
"maxItems": 256,
"type": "array",
"items": {
"type": "object",
"properties": {
"id": {
"type": "string",
"minLength": 1,
"maxLength": 100
},
"from": {
"type": "string",
"minLength": 1,
"maxLength": 100
},
"to": {
"type": "string",
"minLength": 1,
"maxLength": 100
},
"costUnits": {
"type": "integer",
"minimum": 0,
"maximum": 1000000
},
"lossy": {
"type": "boolean"
}
},
"required": [
"id",
"from",
"to",
"costUnits",
"lossy"
],
"additionalProperties": false
}
},
"allowLossy": {
"type": "boolean"
},
"maximumCostUnits": {
"type": "integer",
"minimum": 0,
"maximum": 1000000000
},
"maximumSteps": {
"type": "integer",
"minimum": 0,
"maximum": 32
}
},
"required": [
"contract",
"sourceVersion",
"targetVersions",
"migrations",
"allowLossy",
"maximumCostUnits",
"maximumSteps"
],
"additionalProperties": false
}
Complete output-envelope schema
{
"type": "object",
"required": [
"operation",
"version",
"result",
"provenance"
],
"properties": {
"operation": {
"const": "contract-version-route",
"type": "string"
},
"version": {
"const": "0.29.0",
"type": "string"
},
"result": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "object",
"properties": {
"profile": {
"type": "string",
"const": "declared-contract-route-v1"
},
"contract": {
"type": "string",
"minLength": 1,
"maxLength": 100
},
"manifestValid": {
"type": "boolean"
},
"routeFound": {
"type": "boolean"
},
"route": {
"anyOf": [
{
"type": "object",
"properties": {
"targetVersion": {
"type": "string",
"minLength": 1,
"maxLength": 100
},
"costUnits": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
},
"migrationIds": {
"maxItems": 32,
"type": "array",
"items": {
"type": "string",
"minLength": 1,
"maxLength": 100
}
},
"versions": {
"minItems": 1,
"maxItems": 33,
"type": "array",
"items": {
"type": "string",
"minLength": 1,
"maxLength": 100
}
},
"containsLossyStep": {
"type": "boolean"
}
},
"required": [
"targetVersion",
"costUnits",
"migrationIds",
"versions",
"containsLossyStep"
],
"additionalProperties": false
},
{
"type": "null"
}
]
},
"selectionPolicy": {
"type": "string",
"const": "lowest-cost-then-fewest-steps-then-lexicographic-migration-ids"
},
"findings": {
"maxItems": 200,
"type": "array",
"items": {
"type": "object",
"properties": {
"code": {
"type": "string"
},
"severity": {
"type": "string",
"enum": [
"error",
"warning"
]
},
"path": {
"type": "string"
},
"message": {
"type": "string"
},
"relatedIds": {
"maxItems": 8,
"type": "array",
"items": {
"type": "string",
"minLength": 1,
"maxLength": 100
}
}
},
"required": [
"code",
"severity",
"path",
"message",
"relatedIds"
],
"additionalProperties": false
}
},
"findingCount": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
},
"errorCount": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
},
"truncated": {
"type": "boolean"
},
"advisoryOnly": {
"type": "boolean",
"const": true
},
"execution": {
"type": "boolean",
"const": false
},
"authorizationGranted": {
"type": "boolean",
"const": false
}
},
"required": [
"profile",
"contract",
"manifestValid",
"routeFound",
"route",
"selectionPolicy",
"findings",
"findingCount",
"errorCount",
"truncated",
"advisoryOnly",
"execution",
"authorizationGranted"
],
"additionalProperties": false
},
"provenance": {
"type": "object",
"required": [
"inputSha256",
"outputSha256",
"deterministic",
"externalRequests"
],
"properties": {
"inputSha256": {
"type": "string",
"pattern": "^[a-f0-9]{64}$"
},
"outputSha256": {
"type": "string",
"pattern": "^[a-f0-9]{64}$"
},
"deterministic": {
"const": true
},
"externalRequests": {
"const": 0
}
}
}
},
"additionalProperties": false
}
Fixed example
One accepted fixed example, not a custom-input trial. No operation runs when this static page is requested.
Example input
{
"contract": "task-record",
"sourceVersion": "v1",
"targetVersions": [
"v3"
],
"migrations": [
{
"id": "one-two",
"from": "v1",
"to": "v2",
"costUnits": 2,
"lossy": false
},
{
"id": "two-three",
"from": "v2",
"to": "v3",
"costUnits": 3,
"lossy": false
}
],
"allowLossy": false,
"maximumCostUnits": 10,
"maximumSteps": 4
}
Example response
{
"operation": "contract-version-route",
"version": "0.29.0",
"result": {
"profile": "declared-contract-route-v1",
"contract": "task-record",
"manifestValid": true,
"routeFound": true,
"route": {
"targetVersion": "v3",
"costUnits": 5,
"migrationIds": [
"one-two",
"two-three"
],
"versions": [
"v1",
"v2",
"v3"
],
"containsLossyStep": false
},
"selectionPolicy": "lowest-cost-then-fewest-steps-then-lexicographic-migration-ids",
"findings": [],
"findingCount": 0,
"errorCount": 0,
"truncated": false,
"advisoryOnly": true,
"execution": false,
"authorizationGranted": false
},
"provenance": {
"inputSha256": "60660389c7f5faa2d281b5746c520fe91095b938f9a171d927d7a9bdaf2c3837",
"outputSha256": "452b5e31f3af797da7880d0a594c7262ca6af4602c3241c4601e3e68ff18a7d3",
"deterministic": true,
"externalRequests": 0
}
}
Bounds and precision
JavaScript IEEE-754 numbers; use strings for large integer IDs/exact decimals where the schema accepts strings. No lossless numeric parsing.
{
"global": {
"requestBytes": 131072,
"responseBytes": 524288,
"jsonDepth": 32,
"jsonNodes": 20000,
"requestsPerMinute": 60,
"paidAttemptsPerMinute": 20,
"idempotencyHours": 24
},
"operation": {
"inputBytes": 100000,
"outputBytes": 400000,
"jsonNodes": 12000,
"depth": 20,
"findings": 200,
"migrations": 256,
"distinctVersions": 128,
"maximumSteps": 32
}
}
Complete schemas, descriptions and cross-field validation may impose additional limits.
Proposed price and protocol definitions
{
"unit": "one successful operation call",
"proposedNominalUsd": "0.005",
"sixDecimalTokenBaseUnits": "5000",
"subscription": false,
"includesPayerWalletOrNetworkFees": false,
"liveQuoteVerified": false,
"condition": "Actual SDK challenge is authoritative only within the caller's explicit authorization; configured six-decimal token peg is an operator assertion, not a conversion guarantee."
}
Protocol definitions: x402, mpp. MPP uses Tempo charge. Paid MCP execution is unsupported. All runtime readiness is not evaluated in this build.
API path templates, not endpoints on this documentation host
{
"x402": "/v1/x402/contract-version-route",
"mpp": "/v1/mpp/contract-version-route"
}
Required headers
{
"Content-Type": "application/json",
"Idempotency-Key": "random 16–128 character operation identifier"
}
Actual SDK challenge amount, asset, network, recipient and wallet costs must pass independent authorization. Preserve identical key, body, protocol and credential on retries; on PAYMENT_UNCERTAIN stop and reconcile.
Execution profile and provider conditions
{
"deterministic": true,
"externalRequests": 0,
"maxExternalRequests": 0,
"resultSnapshotPersisted": false,
"fixedExampleIsIllustrativeSnapshot": false,
"requiresPayment": true,
"supportsMcpExecution": false
}
Deterministic supplied-input operation with no external requests or stored request/result bodies. Payment infrastructure retains payment metadata and hashes.
Failure handling
- HTTP 400: Malformed JSON, missing/invalid idempotency key, or payment identifier mismatch Correct the request before payment
- HTTP 402: Payment challenge or rejected payment Use official protocol SDK; inspect payment outcome before another payment
- HTTP 409: Idempotency conflict, duplicate proof, or PAYMENT_UNCERTAIN Keep original key, body, and proof; reconcile uncertainty with operator; never blindly repay
- HTTP 413: Input or generated output too large Reduce input; no payment attempted for validation failure
- HTTP 415: Unsupported media type or compression Send uncompressed application/json
- HTTP 422: Schema or service-specific semantic validation failure Correct input using returned error code; no payment attempted
- HTTP 429: Request/payment-attempt rate exceeded Wait for rate limit window; preserve existing payment identity
- HTTP 503: Payment configuration/provider/state unavailable, or live DNS preparation failed before settlement Check readiness; DNS preparation failures may retry the identical key/body/credential only; uncertainty requires reconciliation
Declared requirements
Before any paid call, refresh the live operation contract and POST the complete bounded budgeted plan to the separate API's /preflight. Unknown requirements block selection; compatible preflight is not permission to spend.