{
  "id": "fixed-width-records-compose",
  "name": "Compose UTF-8 byte-column records",
  "description": "Write a real fixed-width UTF-8 import artifact from caller-declared byte columns and string records, with explicit ASCII padding, strict overflow rejection and byte offset manifest.",
  "category": "text",
  "priceUsd": "0.005",
  "pricingStatus": "proposed-unverified",
  "pricing": {
    "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."
  },
  "intents": [
    "Create fixed-width UTF-8 record files with exact byte column positions",
    "Pad string fields to supplied byte widths for a fixed-width importer"
  ],
  "whenToUse": [
    "Explicit UTF-8 byte column layout, ASCII pad characters and exact-key string records"
  ],
  "whenNotToUse": [
    "Terminal display width, glyph alignment, packed decimals, spreadsheet formatting or named bank/government formats",
    "Truncation, numeric coercion, parsing fixed-width input or CSV comparison",
    "Blind transcoding after layout; changing encoding can invalidate UTF-8 byte widths",
    "Fetching, uploading, sending, writing files, accessing media or changing external state"
  ],
  "capabilities": [
    "Exact UTF-8 byte widths, caller-selected left/right ASCII padding and LF/CRLF framing",
    "Ordered records and columns, zero-based end-exclusive per-record column offsets and row byte offsets",
    "Atomic rejection of overflow or mismatched row keys without truncation",
    "Deterministic supplied-input-only inert artifact with no network, clock or randomness"
  ],
  "limits": {
    "inputBytes": 100000,
    "outputBytes": 400000,
    "jsonNodes": 12000,
    "depth": 20,
    "profile": "utf8-byte-column-records-v1",
    "encoding": "UTF-8",
    "columns": 32,
    "maximumColumnBytes": 256,
    "maximumRecordBytes": 4096,
    "rows": 1000,
    "textOutputBytes": 100000
  },
  "related": [
    "csv-serialize",
    "template-render",
    "zip-store-compose"
  ],
  "errorCodes": [
    "INPUT_LIMIT",
    "OUTPUT_LIMIT",
    "COMPLEXITY_LIMIT",
    "INVALID_JSON",
    "INVALID_NUMBER",
    "INVALID_UNICODE",
    "UNSAFE_KEY",
    "RECORD_COLUMN_NAME",
    "RECORD_DUPLICATE_COLUMN",
    "RECORD_WIDTH_LIMIT",
    "RECORD_OUTPUT_LIMIT",
    "RECORD_ROW_KEYS",
    "RECORD_TEXT_PROFILE",
    "RECORD_OVERFLOW"
  ],
  "requirementsProfile": {
    "format": "declared-requirements-v1",
    "facts": {
      "execution.suppliedCode": false,
      "execution.remoteMutation": false,
      "execution.llmInference": false,
      "execution.paidMcp": false,
      "verification.semanticTruth": false,
      "verification.sourceAuthenticity": false,
      "verification.liveVulnerabilities": false,
      "numbers.arbitraryPrecisionJson": false,
      "numbers.model": "ieee754-binary64",
      "privacy.requestBodyPersisted": false,
      "execution.deterministic": true,
      "execution.networkAccess": false,
      "privacy.resultBodyPersisted": false,
      "payment.x402": true,
      "payment.mpp": true,
      "operation.id": "fixed-width-records-compose",
      "operation.category": "text",
      "limit.httpRequestBytes": 131072,
      "limit.requestBytes": 100000,
      "limit.responseBytes": 524288,
      "limit.resultBytes": 400000,
      "limit.jsonDepth": 20,
      "limit.jsonNodes": 12000,
      "fixedWidth.profile": "utf8-byte-column-records-v1",
      "fixedWidth.maxColumns": 32,
      "fixedWidth.maxColumnBytes": 256,
      "fixedWidth.maxRecordBytes": 4096,
      "fixedWidth.maxRows": 1000,
      "fixedWidth.maxTextBytes": 100000,
      "fixedWidth.columnUnit": "utf8-bytes",
      "fixedWidth.pad": "one-printable-ascii-character",
      "fixedWidth.truncation": false,
      "fixedWidth.numericCoercion": false,
      "fixedWidth.displayCellWidth": false,
      "fixedWidth.namedBankOrGovernmentFormat": false,
      "input.columns.maxItems": 32,
      "input.columns.minItems": 1,
      "input.rows.maxItems": 1000
    },
    "unknownPolicy": "Undeclared requirements are unknown, never compatible. Matching declared facts does not establish semantic fit or input validity.",
    "preflight": "/preflight"
  },
  "documentation": "/reference/tools/fixed-width-records-compose.md",
  "serviceContract": "/reference/services/fixed-width-records-compose.json",
  "errors": [
    {
      "status": 400,
      "meaning": "Malformed JSON, missing/invalid idempotency key, or payment identifier mismatch",
      "retry": "Correct the request before payment"
    },
    {
      "status": 402,
      "meaning": "Payment challenge or rejected payment",
      "retry": "Use official protocol SDK; inspect payment outcome before another payment"
    },
    {
      "status": 409,
      "meaning": "Idempotency conflict, duplicate proof, or PAYMENT_UNCERTAIN",
      "retry": "Keep original key, body, and proof; reconcile uncertainty with operator; never blindly repay"
    },
    {
      "status": 413,
      "meaning": "Input or generated output too large",
      "retry": "Reduce input; no payment attempted for validation failure"
    },
    {
      "status": 415,
      "meaning": "Unsupported media type or compression",
      "retry": "Send uncompressed application/json"
    },
    {
      "status": 422,
      "meaning": "Schema or service-specific semantic validation failure",
      "retry": "Correct input using returned error code; no payment attempted"
    },
    {
      "status": 429,
      "meaning": "Request/payment-attempt rate exceeded",
      "retry": "Wait for rate limit window; preserve existing payment identity"
    },
    {
      "status": 503,
      "meaning": "Payment configuration/provider/state unavailable, or live DNS preparation failed before settlement",
      "retry": "Check readiness; DNS preparation failures may retry the identical key/body/credential only; uncertainty requires reconciliation"
    }
  ],
  "numericPrecision": "JavaScript IEEE-754 numbers; use strings for large integer IDs/exact decimals where the schema accepts strings. No lossless numeric parsing.",
  "paymentWorkflow": {
    "discoveryOnly": false,
    "supportedProtocols": [
      "x402",
      "mpp"
    ],
    "x402": {
      "credentialHeader": "PAYMENT-SIGNATURE",
      "challengeHeader": "PAYMENT-REQUIRED",
      "receiptHeader": "PAYMENT-RESPONSE",
      "version": 2,
      "scheme": "exact",
      "paymentIdentifier": "payment-identifier extension MUST equal the HTTP Idempotency-Key",
      "sdk": "@x402/core with @x402/evm"
    },
    "mpp": {
      "supported": true,
      "credentialHeader": "Authorization",
      "challengeHeader": "WWW-Authenticate",
      "receiptHeader": "Payment-Receipt",
      "method": "tempo",
      "intent": "charge",
      "sdk": "mppx",
      "tokenDecimals": 6
    },
    "steps": [
      "Check configured readiness and the exact service schema",
      "Generate a fresh random Idempotency-Key for this operation; never use a discovery probe fixture for purchases",
      "Send valid input without a credential to obtain the official protocol challenge",
      "Use the official SDK and authorized wallet to fulfill the challenge",
      "Retry only with identical key, body, protocol and credential",
      "On PAYMENT_UNCERTAIN stop and request operator reconciliation; never blindly pay again"
    ],
    "versionedRetries": "Request fingerprint includes service release version. Retries across a version upgrade can conflict; coordinate upgrades outside the 24-hour replay window and reconcile pending attempts.",
    "docs": "/llms.txt"
  },
  "method": "POST",
  "paths": {
    "x402": "/v1/x402/fixed-width-records-compose",
    "mpp": "/v1/mpp/fixed-width-records-compose"
  },
  "inputSchema": {
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "type": "object",
    "properties": {
      "columns": {
        "minItems": 1,
        "maxItems": 32,
        "type": "array",
        "items": {
          "type": "object",
          "properties": {
            "name": {
              "type": "string",
              "minLength": 1,
              "maxLength": 128
            },
            "widthBytes": {
              "type": "integer",
              "minimum": 1,
              "maximum": 256
            },
            "align": {
              "type": "string",
              "enum": [
                "left",
                "right"
              ]
            },
            "pad": {
              "type": "string",
              "pattern": "^[\\x20-\\x7e]$"
            }
          },
          "required": [
            "name",
            "widthBytes",
            "align",
            "pad"
          ],
          "additionalProperties": false
        }
      },
      "rows": {
        "maxItems": 1000,
        "type": "array",
        "items": {
          "type": "object",
          "propertyNames": {
            "type": "string"
          },
          "additionalProperties": {
            "type": "string"
          }
        }
      },
      "lineEnding": {
        "type": "string",
        "enum": [
          "LF",
          "CRLF"
        ]
      },
      "finalLineEnding": {
        "type": "boolean"
      }
    },
    "required": [
      "columns",
      "rows",
      "lineEnding",
      "finalLineEnding"
    ],
    "additionalProperties": false
  },
  "outputSchema": {
    "type": "object",
    "required": [
      "operation",
      "version",
      "result",
      "provenance"
    ],
    "properties": {
      "operation": {
        "const": "fixed-width-records-compose",
        "type": "string"
      },
      "version": {
        "const": "0.29.0",
        "type": "string"
      },
      "result": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "type": "object",
        "properties": {
          "text": {
            "type": "string",
            "maxLength": 100000
          },
          "byteLength": {
            "type": "integer",
            "minimum": 0,
            "maximum": 100000
          },
          "recordByteLength": {
            "type": "integer",
            "minimum": 1,
            "maximum": 4096
          },
          "rowByteOffsets": {
            "maxItems": 1000,
            "type": "array",
            "items": {
              "type": "integer",
              "minimum": 0,
              "maximum": 100000
            }
          },
          "columns": {
            "minItems": 1,
            "maxItems": 32,
            "type": "array",
            "items": {
              "type": "object",
              "properties": {
                "name": {
                  "type": "string",
                  "minLength": 1,
                  "maxLength": 128
                },
                "startByte": {
                  "type": "integer",
                  "minimum": 0,
                  "maximum": 4095
                },
                "endByte": {
                  "type": "integer",
                  "minimum": 1,
                  "maximum": 4096
                }
              },
              "required": [
                "name",
                "startByte",
                "endByte"
              ],
              "additionalProperties": false
            }
          }
        },
        "required": [
          "text",
          "byteLength",
          "recordByteLength",
          "rowByteOffsets",
          "columns"
        ],
        "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
  },
  "exampleInput": {
    "columns": [
      {
        "name": "code",
        "widthBytes": 4,
        "align": "left",
        "pad": " "
      },
      {
        "name": "qty",
        "widthBytes": 4,
        "align": "right",
        "pad": "0"
      }
    ],
    "rows": [
      {
        "code": "A",
        "qty": "7"
      },
      {
        "code": "BB",
        "qty": "42"
      }
    ],
    "lineEnding": "CRLF",
    "finalLineEnding": true
  },
  "exampleResponse": {
    "operation": "fixed-width-records-compose",
    "version": "0.29.0",
    "result": {
      "text": "A   0007\r\nBB  0042\r\n",
      "byteLength": 20,
      "recordByteLength": 8,
      "rowByteOffsets": [
        0,
        10
      ],
      "columns": [
        {
          "name": "code",
          "startByte": 0,
          "endByte": 4
        },
        {
          "name": "qty",
          "startByte": 4,
          "endByte": 8
        }
      ]
    },
    "provenance": {
      "inputSha256": "6c94e72ed91c6ffdc231e1e577a82ffbc281de0948cc75ebd270a8517d1caa47",
      "outputSha256": "7f21c0e660c167d123da9877752f336c268d2984b2657754946d028cc92b45a4",
      "deterministic": true,
      "externalRequests": 0
    }
  },
  "requiredHeaders": {
    "Content-Type": "application/json",
    "Idempotency-Key": "random 16–128 character operation identifier"
  },
  "fixedExample": "/reference/examples/fixed-width-records-compose.json",
  "execution": {
    "deterministic": true,
    "externalRequests": 0,
    "maxExternalRequests": 0,
    "resultSnapshotPersisted": false,
    "fixedExampleIsIllustrativeSnapshot": false,
    "requiresPayment": true,
    "supportsMcpExecution": false
  },
  "releaseSnapshot": {
    "format": "static-release-reference-v1",
    "sourceVersion": "0.29.0",
    "sourceRegistrySha256": "a2b5ec09bf6c38b9d2879d746a4fded374f5928b445377b0270ef6aa8e6cac65",
    "generatedAt": "2026-10-06T15:38:00Z",
    "releaseAcceptance": "not-verified-by-generator",
    "runtimeReadiness": "not-evaluated",
    "livePaymentsVerified": false,
    "indexingVerified": false,
    "apiOrigin": null,
    "notice": "Build-time release reference. Runtime readiness, deployment, payment settlement and external indexing are not evaluated here. Prices are proposed; this file cannot authorize execution or payment."
  }
}