Does Safe Vault protect API keys or sensitive secrets?

Yes. In addition to syntax preservation, Curtly operates under a strict zero-data-retention policy and never logs prompt payloads.

Deterministic Syntax Shield

Safe Vault™ bit-for-bit syntax protection

Protect code blocks, JSON schemas, SQL queries, and parameter variables from token compression drift and syntax corruption.

Syntax Corruption Rate

0.00%

Zero broken brackets, corrupted strings, or missing delimiters.

Supported Formats

All Code & JSON

TypeScript, Python, Go, Rust, JSON, YAML, SQL, and regex.

Processing Overhead

< 1ms

Deterministic hash mapping executed directly in memory.

The production engineering challenge

Naive prompt compressors and small-model summarizers routinely damage code syntax by deleting essential quotes, breaking indentation, truncating brackets, or hallucinating variables, rendering automated coding agents and APIs unusable.

Technical architecture & mechanics

Multi-language AST detection

Accurately detects programming language structures, JSON payloads, YAML configurations, and SQL statements across inputs.

Bit-for-bit cryptographic isolation

Extracts code blocks into an in-memory vault with unique hashes before any compression pass, restoring them identically post-compression.

Template variable preservation

Protects Mustache, Jinja, and framework variables (e.g. {{user_id}}, $variable) from accidental truncation or renaming.

Safe Vault In-Memory Isolation Test

import { compressPrompt } from '@curtly/core'; const rawPrompt = ` Please review this critical SQL schema: ```sql CREATE TABLE users ( id UUID PRIMARY KEY DEFAULT gen_random_uuid(), metadata JSONB NOT NULL, created_at TIMESTAMPTZ DEFAULT now() ); ``` And verify if the {{tenant_id}} parameter is indexed properly. `; // Safe Vault guarantees SQL block and {{tenant_id}} survive unmodified const result = compressPrompt(rawPrompt, { safeVault: true }); console.log(result.output);

Architecture comparison

Evaluation metric	Curtly.dev gateway	Traditional / naive approach
Code Block Handling	Isolated bit-for-bit and restored unchanged	Subjected to destructive text summarization
JSON Schema Validity	100% valid parseable JSON output guaranteed	Frequent invalid JSON syntax errors and missing keys
Template Variables	Preserved with exact character boundaries	Frequently mangled or merged into adjacent text

Frequently asked questions

Safe Vault combines markdown AST parsing, regex pattern matchers for curly brace/bracket balances, and heuristic token scanners to isolate code fragments cleanly.

Explore related platform features

Reliability & Quality Shield

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