Hybrid Runtime

Install

npx attrition-sh pack install hybrid-runtime

# Hybrid Runtime
# See: /packs/hybrid-runtime

Summary

A disciplined runtime pattern that reserves deterministic rendering for tightly scoped known cases and uses an LLM only for bounded synthesis, not as the default execution path for every question.

Fit and expected payoff

When this pack earns its extra structure, when to skip it, and what it should improve.

Route the request first.

If the request matches a known packet with explicit policy or action steps:
- answer deterministically

If the request spans multiple packets or requires ambiguity handling:
- run the bounded synthesis path

Do not default to a full agent run for every request.

Build a hybrid runtime.

Path A: deterministic
- use canonical issue or entity packets
- render from rules and trusted fields
- cite exact identifiers and thresholds

Path B: bounded LLM synthesis
- only after routing decides deterministic coverage is insufficient
- limit the model to the validated evidence set
- preserve the same answer packet and quality gate shape

The value is not fewer models. The value is a cleaner decision boundary.

Evaluation checklist

These checks should pass before you consider the pattern production-ready.

• Do known packets render without unnecessary model usage?
• Does the LLM path only activate when the request exceeds deterministic coverage?
• Do both paths emit the same answer packet shape and review metadata?

Common failure modes

Every check below traces back to a specific production failure. Read as: "I would think about X because in production Y can happen."

Official docs and implementation references

Reference implementations