> ## Documentation Index
> Fetch the complete documentation index at: https://docs.hiroshios.xyz/llms.txt
> Use this file to discover all available pages before exploring further.

# History Hygiene Pipeline

> Cleaning cross-provider conversational history.

Hiroshi implements a robust history hygiene pipeline that intercepts incoming and outgoing messages to maintain perfect structural compatibility across distinct LLM providers.

### 🧹 1. Empty Record Pruning

Many providers fail to deserialize blank or whitespace-only messages. The hygiene pipeline automatically prunes empty assistant or user records, preventing structural schema validation failures.

### 🔗 2. Orphaned Tool Corrections

When a provider outputs a tool call but the execution fails or gets aborted, we inject synthetic success/failure markers matching the required transaction UUIDs to guarantee structural safety.

### 🧠 3. Thinking Signature Transpositions

Converts complex thinking signatures (e.g. Anthropic's `<thinking>` XML sections) into plain-text annotations or system prompts when calling model providers that do not natively support dual-stage thinking payloads.