josh/decision-doc v0.1.0

Produce single-file HTML briefing and review documents for human consumption — informational summaries or interactive decision artifacts with per-decision notes, catchall commentary, and an Export JSON button that copies AND displays the result inline. Use whenever the user asks for a "brief", "summary", "review doc", "decision doc", "html output", "something to look at", "give me something to review", "plan to sign off", or any time the work has architectural choices, doubt areas, or assumptions that need a human call.