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jonmumm
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parse-at-boundary

Parse HTTP responses, requests, environment variables, file reads, and message queues through schemas.

2|Updated Feb 23, 2026
Search Tags:#schema#typing#edge#boundary#parse#data-validation
One-click install
npx skills add https://github.com/jonmumm/skills --skill parse-at-boundary
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: parse-at-boundary
Source: https://github.com/jonmumm/skills/tree/main/parse-at-boundary
Command: npx skills add https://github.com/jonmumm/skills --skill parse-at-boundary

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Untrusted data entering your system must be parsed through a schema at the boundary to prevent downstream errors and security issues.

Core Features & Use Cases

  • Enforces a one-time boundary parse so downstream code always receives typed data.
  • Applies to HTTP responses, HTTP requests, environment variables, file reads, and message queues to ensure data integrity.
  • Example use: validate an external API payload before business logic executes.

Quick Start

Parse an example input at the boundary using a schema and return typed data for downstream processing.

Frequently Asked Questions about parse-at-boundary

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
Why parse untrusted data at the system boundary instead of validating it later?▼

Boundary parsing ensures untrusted data is validated through a schema once at entry, preventing downstream errors and security issues by guaranteeing typed data for all subsequent processing.

How do I validate an external API payload before executing business logic?▼

Apply schema-based boundary parsing to HTTP responses and requests to validate external API payloads, ensuring only typed data passes through to downstream business logic execution.

What is fail-fast data validation for environment variables and file reads?▼

Fail-fast data validation parses environment variables and file reads through a schema at the boundary, immediately rejecting invalid data and producing typed data for downstream use.

Can I use schema-based parsing for message queues and HTTP requests?▼

Schema-based boundary parsing applies to message queues, HTTP requests, and HTTP responses, enforcing a one-time parse that guarantees typed data enters your downstream system.

When do I need boundary parsing for data validation?▼

You need boundary parsing when untrusted data enters your system from external sources, requiring schema enforcement to ensure data integrity and prevent downstream errors.

What's the best way to enforce typed data guarantees across system boundaries?▼

Enforcing a one-time schema-based boundary parse is the best way to guarantee typed data, applying fail-fast behavior to prevent invalid untrusted data from reaching downstream processing.

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