Phase 19 — Cheatsheet: Capstone — Maintainer & Startup

Read AGENTS.md FIRST. No pure code-agent PRs; disclose AI; include tests+results; no dupes.
Merge-ready PR = small scope + tests that pin behavior + benchmark if perf + clear why.
Portfolio = merged PR + benchmark writeup + your mini_vllm engine.
Moats: kernel/scheduling edge, workload specialization, control plane, distribution.

Key upstream files

AGENTS.md
docs/contributing/
.buildkite/ and tests/
docs/design/

Full reference: 00-guide.md · 01-deep-dive.md