Playbook card named 4 sources: HAX, Bolt, YC, Activate. 2 are live here. YC (181 leads) via its public Algolia search index, filtered to Hardware/Hard Tech/Robotics tags + companies launched 2022 or later. HAX (89 leads) — SOSV's hard-tech-only accelerator, every company qualifies by construction — filtered to the 2022–2026 seed cohorts. Bolt is not included: its old domain (boltvc.com) has expired and now redirects to a parked GoDaddy sale page; its current site (bolt.io) is a JS single-page app with no discoverable portfolio listing. Activate is not included: activate.org/activate-fellows loads its Fellows/Companies data behind a client-side tab with no static API call visible in network traffic. Both are early-stage/pre-seed hardware startups — score reflects fit signals (hardware tag density, funding stage, team size), not funding math.