Prompts
Format Compliance and Schema Validation Prompts
Format Compliance and Schema Validation Prompts
Prompt playbooks for checking JSON structure, field presence, type correctness, enum adherence, and output shape conformance. Useful for API-facing AI products where malformed outputs break downstream parsers and require automated format grading.
JSON Schema Compliance Judge Prompt Template
For API platform teams validating LLM outputs against a JSON Schema. Produces a structured pass/fail verdict with field-level error locations, type mismatches, and missing required fields. Includes eval harness for false-positive and false-negative rate tracking against known malformed payloads.
Strict JSON Mode Enforcement Prompt Template
For developers who need the LLM itself to output parseable JSON without post-processing repair. Produces a system prompt wrapper that enforces valid JSON syntax, escapes, and structural rules before generation. Includes test cases for trailing commas, unescaped quotes, and incomplete objects.
Field Presence and Required Attribute Audit Prompt
For ingestion pipeline owners verifying that all required fields exist in structured LLM outputs. Produces a per-field presence report distinguishing missing, null, and empty values. Includes evaluation against a schema registry with known optional vs. required field definitions.
Type Correctness and Coercion Detection Prompt
For data engineering teams catching type errors before they reach downstream systems. Produces a field-level type audit flagging string-where-number-expected, boolean-as-string, and array vs. object mismatches. Includes harness for testing against common LLM type coercion patterns.
Enum and Constrained Vocabulary Adherence Prompt
For product teams whose outputs must use controlled vocabularies, status codes, or category labels. Produces a violation report listing fields with out-of-set values and suggesting the closest valid alternatives. Includes eval against deliberately perturbed enum values.
Nested Object and Array Structure Validation Prompt
For teams generating complex nested payloads where depth, array element types, and recursive structures must conform. Produces a structural conformance report with path-based error locations. Includes test cases for missing nested keys, wrong array element types, and depth violations.
Output Truncation and Completeness Detection Prompt
For streaming and long-output scenarios where LLM responses may be cut off mid-structure. Produces a completeness verdict checking for unclosed braces, truncated strings, and missing closing tags. Includes eval against intentionally truncated JSON, XML, and code blocks.
Cross-Field Consistency and Dependency Validation Prompt
For business logic validation where field values must agree with each other. Produces a consistency report flagging contradictions like status 'shipped' with null tracking_number or start_date after end_date. Includes test cases for common dependency rule violations.
API Response Format Grading Rubric Prompt
For API product teams who need a single quality score for LLM-generated API responses. Produces a numeric score across structure, typing, completeness, and convention adherence dimensions with a weighted rubric. Includes calibration against human API reviewer scores.
Date-Time and ISO 8601 Compliance Prompt
For systems ingesting temporal data where format inconsistency breaks parsing. Produces a field-level audit checking ISO 8601 adherence, timezone presence, and valid calendar values. Includes eval against common LLM date hallucinations like February 30th.
String Pattern and Regex Constraint Validation Prompt
For teams enforcing format patterns on identifiers, codes, and structured strings. Produces a match/mismatch report per field against expected regex patterns. Includes test cases for edge-case pattern failures like boundary lengths and character class errors.
Null Handling and Nullable Field Audit Prompt
For schema owners who need to distinguish intentional nulls from missing fields and empty values. Produces a nullability conformance report flagging fields that are null when required, or populated when the schema expects null. Includes eval against ambiguous null representations.
Multi-Format Output Conformance Prompt (JSON, XML, YAML, CSV)
For platforms that must validate LLM outputs across multiple serialization formats. Produces a format-specific conformance report with syntax validation, structure checks, and format-appropriate error messages. Includes test suite covering JSON, XML, YAML, and CSV variants.
Streaming Chunk and NDJSON Line Validation Prompt
For real-time streaming APIs where each chunk must be independently valid JSON. Produces a per-line validation report for NDJSON and server-sent event streams. Includes eval against malformed lines, missing newlines, and inter-chunk structure breaks.
Tool Call and Function Argument Schema Validation Prompt
For agent platform teams validating that LLM-generated function calls match the tool's parameter schema. Produces an argument-level audit checking type, required params, enum values, and JSON structure of tool call payloads. Includes test cases for hallucinated parameters and wrong tool selection.
Schema Evolution and Backward Compatibility Check Prompt
For API versioning teams who need to verify that LLM outputs remain compatible when schemas add, deprecate, or remove fields. Produces a compatibility report flagging breaking changes against a previous schema version. Includes eval against field deprecation and required-field addition scenarios.
Naming Convention and Case Format Audit Prompt
For teams enforcing camelCase, snake_case, or other key naming standards across LLM outputs. Produces a convention violation report per field with suggested corrections. Includes test cases for mixed-case, reserved-word collisions, and inconsistent conventions within a single output.
Error Object and RFC 7807 Problem Detail Validation Prompt
For API teams whose LLM-generated error responses must follow standard error formats. Produces a compliance check against RFC 7807 fields: type, title, status, detail, instance. Includes eval against missing required error fields and non-standard error shapes.
Format Compliance Regression Test Prompt Template
For CI/CD pipelines that must catch format regressions when prompts or models change. Produces a pass/fail verdict comparing current output shape against a golden expected schema. Includes harness for running against a bank of known-good and known-bad historical outputs.
Human-Readable Format Error Explanation Prompt
For developer-facing tools that need to explain schema validation failures to users who don't read JSON Schema. Produces plain-language error descriptions with field paths, expected vs. actual values, and fix suggestions. Includes eval for clarity and actionability of explanations.
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