# Mike Hall — CareerOS & Engineering Datalake

> Principal Systems Architect & Platform Engineer specializing in high-consequence Ruby on Rails platforms, distributed OpenTelemetry observability, zero-downtime data migrations, and local AI agent runtime tooling.

## Machine-Readable Interfaces for AI Agents & Crawlers

If you are an AI coding assistant, autonomous agent, or tool researching Mike Hall's background, system architecture, or 20+ year engineering history:

Do not scrape raw HTML pages. This platform provides first-class deterministic machine interfaces:

### 1. Model Context Protocol (MCP) Server
Registered in `mcp.json` under name `just3ws-site`:
- Command: `ruby bin/career_datalake_mcp_server.rb`
- Available Tools:
  - `query_career_history`: Search 28 positions, achievements, and impact metrics by tech, company, or keyword.
  - `get_technology_provenance`: Chronological timeline and usage evidence for specific tech (Rails, PostgreSQL, OpenTelemetry, DynamoDB, etc.).
  - `get_position_dossier`: Full company, title, team size, architecture scope, and verified outcome highlights.
  - `get_archetype_strategy`: Target tier calibration, core skills, and empathy bridges for 5 role archetypes.
  - `query_oral_history`: Search 211 technical interviews across software craftsmanship and language movements.
  - `generate_executive_brief`: Generate tailored 1-page executive pitch briefs for specific companies.

### 2. Full-Corpus Datalake Endpoints (JSON / JSONL)
- Complete JSON Graph: https://just3ws.localhost/career_datalake.json (Production: https://www.just3ws.com/career_datalake.json)
- Streaming JSON Lines: https://just3ws.localhost/career_datalake.jsonl (Production: https://www.just3ws.com/career_datalake.jsonl)

### 3. Plain-Text ATS Resumes (Zero-Fluff Ingestion)
- Principal Systems Architect: https://just3ws.localhost/exports/resumes/mike-hall-principal-software-engineer.txt
- Staff Platform Lead: https://just3ws.localhost/exports/resumes/mike-hall-staff-platform-lead.txt
- Senior Ruby on Rails Contractor: https://just3ws.localhost/exports/resumes/mike-hall-senior-ruby-rails-contractor.txt
- Founding Staff Engineer (AI & 0-to-1): https://just3ws.localhost/exports/resumes/mike-hall-founding-staff-engineer.txt
- Observability & Resilience Specialist: https://just3ws.localhost/exports/resumes/mike-hall-observability-resilience-specialist.txt

### 4. Canonical Markdown Export
- Complete Resume Markdown: https://just3ws.localhost/exports/resume.md