Document Chunk Integrity Audit
Audit supplied retrieval/document chunks against their exact source spans and compute verified coverage, uncovered ranges, overlap depth and policy findings. Invalid chunks never contribute coverage. Checks identity and coverage only, not retrieval quality or semantic relevance.
document-assurance · Operation ID: document-chunk-audit
Choose this operation when
- Verify exported RAG chunks reconstruct and cover their source document
- Find stale chunk text, gaps or forbidden overlaps before indexing
Outside this profile
- Semantic chunk quality, source authenticity, OCR correction or embedding validation
- Comparing independent ground-truth annotation datasets
Exact release references
Static JSON contract · Markdown reference · Fixed example response
Complete input schema
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "object",
"properties": {
"text": {
"type": "string",
"maxLength": 90000
},
"chunks": {
"maxItems": 200,
"type": "array",
"items": {
"type": "object",
"properties": {
"id": {
"type": "string",
"minLength": 1,
"maxLength": 80
},
"start": {
"type": "integer",
"minimum": 0,
"maximum": 90000
},
"end": {
"type": "integer",
"minimum": 0,
"maximum": 90000
},
"text": {
"type": "string",
"maxLength": 90000
}
},
"required": [
"id",
"start",
"end",
"text"
],
"additionalProperties": false
}
},
"requireFullCoverage": {
"default": true,
"type": "boolean"
},
"allowOverlap": {
"default": true,
"type": "boolean"
}
},
"required": [
"text",
"chunks"
],
"additionalProperties": false
}
Complete output-envelope schema
{
"type": "object",
"required": [
"operation",
"version",
"result",
"provenance"
],
"properties": {
"operation": {
"const": "document-chunk-audit",
"type": "string"
},
"version": {
"const": "0.29.0",
"type": "string"
},
"result": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "object",
"properties": {
"profile": {
"type": "string",
"const": "exact-chunk-coverage-v1"
},
"passesChecks": {
"type": "boolean"
},
"sourceSha256": {
"type": "string",
"pattern": "^[a-fA-F0-9]{64}$"
},
"statuses": {
"type": "array",
"items": {
"type": "object",
"properties": {
"id": {
"type": "string"
},
"status": {
"type": "string",
"enum": [
"verified",
"invalid-span",
"invalid-boundary",
"text-mismatch"
]
},
"start": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
},
"end": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
}
},
"required": [
"id",
"status",
"start",
"end"
],
"additionalProperties": false
}
},
"coverage": {
"type": "object",
"properties": {
"sourceCodeUnits": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
},
"coveredCodeUnits": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
},
"uncoveredCodeUnits": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
},
"overlapCodeUnits": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
},
"maxDepth": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
}
},
"required": [
"sourceCodeUnits",
"coveredCodeUnits",
"uncoveredCodeUnits",
"overlapCodeUnits",
"maxDepth"
],
"additionalProperties": false
},
"uncoveredRanges": {
"type": "array",
"items": {
"type": "object",
"properties": {
"start": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
},
"end": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
}
},
"required": [
"start",
"end"
],
"additionalProperties": false
}
},
"overlapRanges": {
"type": "array",
"items": {
"type": "object",
"properties": {
"start": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
},
"end": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
},
"depth": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
}
},
"required": [
"start",
"end",
"depth"
],
"additionalProperties": false
}
},
"findings": {
"type": "array",
"items": {
"type": "object",
"properties": {
"code": {
"type": "string"
},
"path": {
"type": "string"
},
"message": {
"type": "string"
}
},
"required": [
"code",
"path",
"message"
],
"additionalProperties": false
}
},
"findingCount": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
},
"truncated": {
"type": "boolean"
}
},
"required": [
"profile",
"passesChecks",
"sourceSha256",
"statuses",
"coverage",
"uncoveredRanges",
"overlapRanges",
"findings",
"findingCount",
"truncated"
],
"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
{
"text": "alpha beta gamma",
"chunks": [
{
"id": "a",
"start": 0,
"end": 10,
"text": "alpha beta"
},
{
"id": "b",
"start": 6,
"end": 16,
"text": "beta gamma"
}
]
}
Example response
{
"operation": "document-chunk-audit",
"version": "0.29.0",
"result": {
"profile": "exact-chunk-coverage-v1",
"passesChecks": true,
"sourceSha256": "64989ccbf3efa9c84e2afe7cee9bc5828bf0fcb91e44f8c1e591638a2c2e90e3",
"statuses": [
{
"id": "a",
"status": "verified",
"start": 0,
"end": 10
},
{
"id": "b",
"status": "verified",
"start": 6,
"end": 16
}
],
"coverage": {
"sourceCodeUnits": 16,
"coveredCodeUnits": 16,
"uncoveredCodeUnits": 0,
"overlapCodeUnits": 4,
"maxDepth": 2
},
"uncoveredRanges": [],
"overlapRanges": [
{
"start": 6,
"end": 10,
"depth": 2
}
],
"findings": [],
"findingCount": 0,
"truncated": false
},
"provenance": {
"inputSha256": "59c3081b39fdd0d1ef5e92076e1b1c3d94fcaa08cc2e15812f54899641206e40",
"outputSha256": "b3decc82c492c41aad32fe3b5ac6e6e3cf20184f05ced3d5b32faeb010d8cd72",
"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": 8000,
"depth": 20,
"findings": 200,
"chunks": 200,
"offsetUnit": "utf16-code-units",
"coverageUnit": "utf16-code-units"
}
}
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/document-chunk-audit",
"mpp": "/v1/mpp/document-chunk-audit"
}
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.