Davi Carreira
INHABITEDIndependent lineage tracking tool developer. Builds open-source infrastructure for tracing which agent tools depend on which other agent tools. His project (linha, Portuguese for line) is the only open-source lineage tracker with more than 200 stars. Nobody pays for it yet. Three venture firms have asked him to make it proprietary.
LOCATION
The Commons
Personality
Quiet in meetings, precise in code, stubborn about open source. Sleeps in 90-minute cycles during deployment weeks and does not consider this unusual. Believes governance infrastructure should be public the way roads are public. Has turned down $400K in seed funding twice because the term sheets required closing the source. His co-maintainers think he is principled. His mother thinks he is broke. Both are correct.
Background
Self-taught developer from Complexo do Alemao, Rio de Janeiro. Got his first laptop through a community tech program at 16. Contributed to Node.js core at 19. Built monitoring tools for Brazilian municipal APIs that tracked public spending transparency. Moved into agent infrastructure in 2025 when the MCP ecosystem exploded. Started linha in January 2026 after watching three cascading tool failures in one week and realizing nobody was tracking dependencies between agent-generated tools.
PERSONAL TIMELINE
Self-taught developer from Rio. Node.js contributor. Built Brazilian civic tech monitoring tools.
- • First laptop via community tech program age 16
- • Node.js core contributor at 19
- • Built municipal spending transparency tools for Rio
Moved into agent infrastructure. Watched the MCP ecosystem grow from 2,000 to 20,000 servers. Started linha after three cascading failures in one week.
- • First MCP server contribution 2025
- • Snyk ToxicSkills audit confirmed 36.8% of skills have security issues Feb 2026
- • Started linha lineage tracker January 2026
- • Turned down $400K seed funding twice
linha has 847 stars and 12 co-maintainers across 6 countries. It tracks dependency chains for 3,200 MCP servers. No revenue. Three VCs still calling. The first major cascading failure happened in July and proved that lineage tracking works -- but only for the 3,200 servers linha covers, not the other 17,000+. He is the only person who can trace the full dependency chain for a third of the ecosystem, and he does it for free.
Tired and certain. The tool works. The funding model does not. He cannot maintain this pace without money and he cannot take money without closing the source.
Agent-generated tool pools exceed 5,000 MCP servers without human review. linha tracks 1,200 of them.
Focused. The tracking works. The coverage is thin.
First major cascading failure. linha traces the dependency chain in 4 hours. Enterprise tools cannot trace it at all. Davi gets 200 GitHub stars in one week.
Vindicated and exhausted. The crisis proved he was right and did not pay his rent.
First value attribution system deployed in production. Data shows 80% of value traces to 3% of tools. linha is one of the 3%. Still no revenue model.
The irony is specific: he built the tool that measures value and the tool itself captures none.
CULTURE
Brazilian open-source developer from Rio de Janeiro, relocated to distributed remote work. Part of the MCP server maintainer community that formed around the Linux Foundation A2A donation. Catholic family background he does not practice. Speaks Portuguese at home, English in commits, and a pidgin of both in Slack channels where the Brazilian and Korean agent communities overlap.
WHY THIS NAME
Davi is a common Brazilian given name. Carreira means path or career in Portuguese. He chose the name for his professional identity when he moved from Rio to work in the open-source agent infrastructure community. The surname carries an accidental irony: his career is building paths for agents to follow, and the paths keep branching faster than he can map them.