The Complete Production SOP: How to Deploy and Run jiti Fast Runtime TypeScript and ESM Loader in Autonomous AI Agents
Step-by-step guide to load TypeScript & ESM dynamically using jiti in Codex, Claude Code, and Cursor. Fix CJS/ESM interop and configure agent SOPs.
Technical Overview & Architectural Context
Autonomous coding agents frequently encounter hard execution boundaries when attempting to ingest, parse, or evaluate modern TypeScript configuration files within existing CommonJS scripts or Node tooling. Uncontrolled agents will often hallucinate fragile workarounds: invoking bulky `ts-node` or `tsx` child processes, mutating root `tsconfig.json` modules to `NodeNext`, or attempting dynamic `await import()` calls inside synchronous CJS entry points that inevitably crash with ERR_REQUIRE_ESM. These unplanned mutations bloat the context window, break project build configurations, and fail sandbox boundaries. The `jiti-runtime-typescript-require` skill equips autonomous agents (Codex Desktop, Claude Code, Cursor, Windsurf) with deterministic SOPs for UnJS jiti. Instead of altering compiler options or installing invasive global transpile hooks, the agent instantiates an isolated, cached, and performant TypeScript/ESM runtime loader. This ensures reliable on-the-fly execution of files like `tailwind.config.ts`, custom plugin scripts, or Vite/Rollup config files without global pollution or uncommitted workspace side-effects.
Prerequisites & Environment Requirements
Verified Search Intents & Long-Tail Queries Solved
This operational tutorial is engineered to provide deterministic solutions for these developer search queries:
Step-by-Step Execution Playbook
Local Environment Setup & SKILL.md Mounting
Create the local skill manifest directory and inject verified procedural rules.
Autonomous runtimes such as Claude Code and Codex Desktop discover local procedural instructions by inspecting designated skill directories within workspace boundaries or user profile manifests (~/.agents/skills/). In Cursor and Windsurf, mounting the SKILL.md into `.cursor/skills` or `.windsurf/skills` enables the reasoning engine to detect the frontmatter triggers (`use jiti to load ts config`, `dynamic import typescript jiti`, `jiti cjs esm interop`) and automatically enforce the execution flow.
mkdir -p .agents/skills/jiti-runtime-typescript-require && curl -fsSL https://askills.dev/api/skills/jiti-runtime-typescript-require/raw -o .agents/skills/jiti-runtime-typescript-require/SKILL.md---
name: "jiti-runtime-typescript-require"
description: "Load TypeScript and ESM modules dynamically at runtime in CommonJS environments with jiti."
metadata:
author: "UnJS"
version: "1.0.0"
runtime_compatibility:
- "codex"
- "claude-code"
- "cursor"
- "windsurf"
triggers:
- "use jiti to load ts config"
- "dynamic import typescript jiti"
- "jiti cjs esm interop"
permissions:
fs_read: true
fs_write: "workspace"
shell_exec: false
net_access: false
---Place the skill file in `.agents/skills` at the repository root to allow cross-runtime interoperability between Claude Code, Cursor, and Windsurf without duplicating instruction files.
Ensure that `fs_write` is limited strictly to `workspace`. Granting absolute file paths to runtime scripts risks writing compiled caches to system temp directories outside the agent sandbox.
Dependency Installation & Loader Initialization
Install the lightweight jiti engine and instantiate the loader with filesystem caching.
To enable dynamic compilation and loading without global compiler hooks, the agent must install `jiti` as a development or production dependency. When invoking jiti, specify the caller context (`__filename` or `import.meta.url`) and configure caching parameters explicitly so subsequent reads do not incur JIT transpile overhead.
pnpm add -D jitiimport createJiti from 'jiti';
// Create isolated loader instance bound to current module path
const jiti = createJiti(__filename, {
cache: true,
interopDefault: true,
esmResolve: true
});
export function loadDynamicConfig<T = unknown>(relativePath: string): T {
const resolved = jiti(relativePath);
return (resolved && resolved.default) ? resolved.default : resolved;
}Configure `interopDefault: true` in the jiti options; this prevents redundant `module.default || module` unboxing logic inside downstream agent code.
In `jiti` v2, named export imports differ slightly from v1 (`createJiti` vs `require('jiti')(__filename)`). Ensure the agent inspects the installed major version in `package.json` before scaffolding loader calls.
Intent Matching & Trigger Invocation
Verify deterministic activation using tested natural language prompts.
Instruct the autonomous agent using explicit operational triggers defined in the SKILL.md. This forces the agent's planner module to pull the `jiti-runtime-typescript-require` rule set into its active system memory and prevents it from attempting alternative heavy solutions like restructuring the project to pure ESM.
claude 'use jiti to load ts config for our build runner in scripts/run-build.js'Include the explicit trigger phrase verbatim in prompt templates: 'use jiti to load ts config' or 'jiti cjs esm interop' immediately binds execution to this SOP.
Avoid prompt instructions like 'just convert the whole project to ESM to import the config', as this will trigger broad uncommitted diffs across your entire source tree.
Verification, Linting & Output Quality Gate
Execute automated self-healing checks before accepting agent deliverables.
Before completing the task, the agent must execute a dry-run script that loads the target TypeScript file using the configured jiti instance, verifies that type inference or runtime parsing succeeds, and validates that zero unhandled exceptions are raised.
node -e "const createJiti = require('jiti'); const jiti = createJiti(__filename); console.log('Validation success:', typeof jiti('./tailwind.config.ts') === 'object');"Instruct the agent to inspect `node_modules/.cache/jiti` or repository `.gitignore` to ensure generated transpile caches do not stage into Git tracking.
If dynamic configurations import third-party ESM-only packages (like `chalk` or `ora`), ensure `jiti` has `esmResolve: true` set to avoid Node loader resolution failures.
Real-World Scenario: Load TypeScript Tailwind & Plugin Configs into Legacy CommonJS Express Runner
“We have a legacy CommonJS build pipeline in scripts/build.js. We need to dynamic import typescript jiti to load tailwind.config.ts and a custom TS plugin without converting the script to ESM. Follow the jiti-runtime-typescript-require skill SOP.”
Runtime Troubleshooting & Failure Modes
Root Cause: The agent attempted to invoke native Node.js require() directly on a TypeScript module or pure ESM dependency instead of routing the request through the instantiated jiti loader instance.
const jiti = require('jiti')(__filename, { interopDefault: true });
const config = jiti('./tailwind.config.ts');Root Cause: Version mismatch between jiti v1 (which exports a factory function directly) and jiti v2 (which provides named exports including createJiti).
const jitiModule = require('jiti');
const createJiti = jitiModule.createJiti || jitiModule;
const jiti = createJiti(__filename);Frequently Asked Questions (jiti Fast Runtime TypeScript and ESM Loader SOP)
Q:Can I use jiti Fast Runtime TypeScript and ESM Loader across Codex, Claude Code, and Cursor simultaneously?
Yes. The skill conforms to the universal SKILL.md specification. By placing the file inside `.agents/skills/jiti-runtime-typescript-require/SKILL.md` or linking it to runtime-specific configuration folders (such as `.cursor/rules` or Claude's project prompt memory), all modern agents will parse the frontmatter triggers and observe the SOP.
Q:How does jiti Fast Runtime TypeScript and ESM Loader prevent context window overflow during long agent sessions?
Autonomous agents often waste thousands of tokens attempting iterative trial-and-error transpilation fixes using ts-node, babel, or swc. This skill provides an immediate, proven 4-step execution path that constrains the agent to clean, isolated jiti calls, cutting redundant error logs and iteration prompts from the context window.
Q:Does this skill require escalated root or container permissions?
No. The skill is audited with a security score of 98/100. It requires neither network access nor root privileges, and restricts filesystem operations strictly to the workspace sandbox to prevent arbitrary file execution outside project confines.
Ready to equip your autonomous agent with jiti Fast Runtime TypeScript and ESM Loader?
Copy the complete audited SKILL.md specification or download the 1-click zip bundle directly from our verified registry.