The system follows a carefully designed pipeline with isolated stages to prevent fabrication:

## System Architecture Overview

The system uses a pipeline of isolated analysis and generation steps:

1. **Stage 1: Isolated Analysis** (three sub-stages)
   - **1A: Job Analysis** - Extracts requirements from job description only
   - **1B: Candidate Analysis** - Catalogs qualifications from resume/context only
   - **1C: Mapping Analysis** - Identifies legitimate matches between requirements and qualifications

2. **Stage 2: Resume Generation**
   - Uses mapping output to create a tailored resume with evidence-based content

3. **Stage 3: Verification**
   - Performs fact-checking to catch any remaining fabrications

```mermaid
flowchart TD
    subgraph "Stage 1: Isolated Analysis"
        subgraph "Stage 1A: Job Analysis"
            A1[Job Description Input] --> A2[Job Analysis LLM]
            A2 --> A3[Job Requirements JSON]
        end
        
        subgraph "Stage 1B: Candidate Analysis"
            B1[Resume & Context Input] --> B2[Candidate Analysis LLM]
            B2 --> B3[Candidate Qualifications JSON]
        end
        
        subgraph "Stage 1C: Mapping Analysis"
            C1[Job Requirements JSON] --> C2[Candidate Qualifications JSON]
            C2 --> C3[Mapping Analysis LLM]
            C3 --> C4[Skills Mapping JSON]
        end
    end
    
    subgraph "Stage 2: Resume Generation"
        D1[Skills Mapping JSON] --> D2[Original Resume Reference]
        D2 --> D3[Resume Generation LLM]
        D3 --> D4[Tailored Resume Draft]
    end
    
    subgraph "Stage 3: Verification"
        E1[Skills Mapping JSON] --> E2[Original Materials]
        E2 --> E3[Tailored Resume Draft]
        E3 --> E4[Verification LLM]
        E4 --> E5{Verification Check}
        E5 -->|PASS| E6[Approved Resume]
        E5 -->|FAIL| E7[Correction Instructions]
        E7 --> D3
    end
    
    A3 --> C1
    B3 --> C2
    C4 --> D1
    D4 --> E3
    
    style A2 fill:#f9d77e,stroke:#333,stroke-width:2px
    style B2 fill:#f9d77e,stroke:#333,stroke-width:2px
    style C3 fill:#f9d77e,stroke:#333,stroke-width:2px
    style D3 fill:#f9d77e,stroke:#333,stroke-width:2px
    style E4 fill:#f9d77e,stroke:#333,stroke-width:2px
    style E5 fill:#a3e4d7,stroke:#333,stroke-width:2px
    style E6 fill:#aed6f1,stroke:#333,stroke-width:2px
    style E7 fill:#f5b7b1,stroke:#333,stroke-width:2px
```

## Stage 1: Isolated Analysis (three separate sub-stages)

1. **Job Analysis**: Extracts requirements from just the job description
2. **Candidate Analysis**: Catalogs qualifications from just the resume/context
3. **Mapping Analysis**: Identifies legitimate matches between requirements and qualifications

## Stage 2: Resume Generation

Creates a tailored resume using only verified information from the mapping

## Stage 3: Verification

1. Performs fact-checking to catch any remaining fabrications
2. Corrects issues if needed and re-verifies

### Key Anti-Fabrication Mechanisms

The system uses several techniques to prevent fabrication:

* **Isolation of Analysis Stages**: By analyzing the job and candidate separately, the system prevents the LLM from prematurely creating connections that might lead to fabrication.
* **Evidence Requirements**: Each qualification included must have explicit evidence from the original materials.
* **Conservative Transferability**: The system is instructed to be conservative when claiming skills are transferable.
* **Verification Layer**: A dedicated verification step acts as a safety check to catch any remaining fabrications.
* **Strict JSON Structures**: Using structured JSON formats ensures information flows properly between stages.

## Implementation Details

* **Prompt Engineering**: Each stage has carefully designed prompts with clear instructions and output formats.
* **Error Handling**: Comprehensive validation and error handling throughout the pipeline.
* **Correction Loop**: If verification fails, the system attempts to correct issues and re-verify.
* **Traceability**: Information in the final resume can be traced back to specific evidence in the original materials.