https://portman.ai/ 2026-08-17 https://portman.ai/writing/ 2026-08-17 https://portman.ai/writing/agent-boundaries.html 2026-03-10 https://portman.ai/writing/evals-before-agents.html 2026-04-28 https://portman.ai/writing/agent-token-economics.html 2026-06-16 https://portman.ai/writing/mcp-in-production.html 2026-08-03