Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
git clone --depth 1 https://github.com/prisma/prisma-nextWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/rules/prisma/prisma-next/type-extraction-from-contract)<a href="https://agentmods.dev/rules/prisma/prisma-next/type-extraction-from-contract"><img src="https://agentmods.dev/badge/rules/prisma/prisma-next/type-extraction-from-contract/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/rules/prisma/prisma-next/type-extraction-from-contract"><img src="https://agentmods.dev/badge/rules/prisma/prisma-next/type-extraction-from-contract.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00000 | $0.00497 |
| Opus 5.5 | $0.00000 | $0.00199 |
| Sonnet 5.5 | $0.00000 | $0.00099 |
| Haiku 4.5 | $0.00000 | $0.00050 |
Grade A, and why
type-extraction-from-contract scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
This is a copy
100% identical to type-extraction-from-contract — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
What it actually says
Type Extraction from Contract
Pattern
CodecTypes and OperationTypes are carried via TypeMaps (type-only, not runtime keys).
- Emitted workflow:
contract.d.tsexportsContractandTypeMapsseparately. UseCodecTypesOf<TypeMaps>andOperationTypesOf<TypeMaps>for explicit threading. - No-emit workflow:
defineContract().build()returnsContractWithTypeMaps<Contract, TypeMaps>. UseExtractCodecTypes/ExtractOperationTypeswhich extract from the phantom key.
// Emitted: import TypeMaps, use CodecTypesOf<TypeMaps>
import type { Contract, TypeMaps } from './contract';
type CodecTypes = CodecTypesOf<TypeMaps>;
// No-emit: ExtractCodecTypes works with ContractWithTypeMaps
type CodecTypes = ExtractCodecTypes<typeof contract>;
Helper Types
CodecTypesOf<TTypeMaps>: ExtractscodecTypesfrom TypeMapsOperationTypesOf<TTypeMaps>: ExtractsoperationTypesfrom TypeMapsExtractTypeMapsFromContract<T>: Extracts TypeMaps from contract (TypeMapsPhantomKey→ extract, orneverfor emitted)ExtractCodecTypes<T>: Extracts from ContractWithTypeMaps (no-emit), fallbackRecord<string, never>ExtractOperationTypes<T>: Same for operation types
Lane APIs with Explicit TypeMaps
schema, sql, and orm accept optional TTypeMaps (defaults to ExtractTypeMapsFromContract<TContract>):
// No-emit: infers from ContractWithTypeMaps
const schemaHandle = schema<Contract>(context);
// Emitted: pass TypeMaps explicitly
const schemaHandle = schema<Contract, TypeMaps>(context);
Important
- Codec/operation type maps do not exist at runtime on
contract.mappings - Runtime contract values include only structural mappings (modelToTable, tableToModel, fieldToColumn, columnToField)
- Generated
Contracttype (emitted) has no phantom keys; TypeMaps is a separate export
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 50 lines · 0 tokens per session scan A 4155fb530d3a
type-extraction-from-contract is a cursor rule published in the GitHub repository prisma/prisma-next (412 stars, last pushed 2mo ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 497 tokens. A static security scan graded it A with 0 findings. It is 100% identical to type-extraction-from-contract, differing in 0 lines, and is treated as a copy.
Other cursor rules, from other repositories
no-bare-casts
No bare as casts in production TypeScript. Use blindCast (value) from @internal/utils/casts as the auditable escape hatch, castAs (value) for declarative-only assertions, or rewrite to eliminate the cast. as const is exempt. Test files are exempt.
sql-types-imports
Canonical import paths for SQL types.
use-ast-factories
Use factory functions for creating AST nodes instead of manual object creation.
type-extraction-from-contract
Extract TypeScript types from contract.d.ts and helpers.
required-key-undefined-fields
Internal input types use required keys typed | undefined, not optional keys.
type-predicates
Replace blind casts with type predicates (type guards).