### 💬 My Take on Codex-tools (LLM-based dev tools)
- Similar to JavaScript → cool/strange/simple at the beginning  
- Evolution of tools/practices for defining context/prompts/LLMs

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> 3 months usage of passive use at SCB  
### 1.1 Day-to-Day:
- Generating tests  
- Explaining code  
- Simple refactoring  
- Code generation  
- Reading errors/extracting values  

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### 🔍 Observations
- Slow generation
- Settings disabled by admin (model, scopes)  

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## 2. Copilot J+History
Jun 2021: GitHub (Microsoft) released Copilot based on Codex (OpenAI GPT-3)  
- Uses FIM (fill-in-the-middle) - new LLM approach for capuring context  
- GPT-3.5 Turbo - first success  
- Introduced system to block risky patterns/exploits  

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### 🔧 Settings
🔗 https://github.com/settings/copilot

1. Subscription:  
   - Individual  
   - Business
   - Enterprise (learns codebase, COBOL, scans PRs for the best practices)

2. Models:  
   - GPT-4.0, D3  
   - Anthropic Claude 3.7  
   - Gemini 2.0 Flash  

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## 2.1 Internals
> NLP, ML
1. Input Preprocess – prepare for model context and prompt (code related) → `processed_prompt`  
2. LM Analysis – neural network analyzes `processed_prompt` (large body of text)  
3. Generation – LM generates code/suggestion  
4. Output Format – indent/highlight  

<img src="https://images.ctfassets.net/wfutmusr1t3h/16gHTMjSRTr8UtY7rb9rjG/ed6323cd793ddf005ff37fe969e3ae61/2000x1200-Inline-Graphic.jpg?w=1280&q=75" style="width: 3000px" />

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## 3. Stats
- **AMD 2023**: Specific HDL Language – generated code better aligned with standards.  
- **Shopify**: Out of 2,000 developers, 75% used Copilot, with 26% accepting suggestions.  
- **Accenture**: Out of 500 developers, 35% accepted suggestions.  
- **General Satisfaction**: 75% of users are satisfied with Copilot.

Competitors:
- Amazon CodeWhisperer  
- Cursor VSCode Fork  
- Claude Code  (recent impressive results)

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## 4. Features:
1. __Completion__ → VSCode (ghost text)  
2. __Smart Actions__:
  - __Explain__  
  - __Fix__  
  - __GenTest__  
  - __GenDocs__  
3. Cmd+I → change/refactor  
   3.2 Cmd+I in __terminal__  
   3.3 QuickChat  
4. __Commits__ summary - auto-generated  
   - __PR__ summary → GitHub interface disabled  
   - GitHub VSCode_workspaces_workflow → cloud-hosted dev.env