lambda-drawlisted

# λambda draw protocol Diagrams for three destinations: live session files, vault course notes, and Anki cards. The failure mode this skill exists to kill: TikZ written blind and shipped unverified. **You have vision — every figure gets rendered and looked at before it is embedded, no exceptions.** ## Medium decision table | Situation | Medium | Why | |---|---|---| | Plan DAGs, quick structure inside a live session | **mermaid** | renders instantly in Obsidian/GitHub; zero toolchain; fine for arrows-and-boxes | | Course figures and Anki cards: BNs with observed/latent shading, HMM/DBN time slices, plates, message passing | **TikZ** (default) | course-faithful notation; Anki's builtin LaTeX already renders it | | Layout is the hard part: moral graphs, jointrees, >12 nodes, elimination orderings | **DOT → `dot -Tsvg`** | graphviz auto-layout beats hand-placing; optionally use the result as a layout draft for TikZ | | Quantitative data: a time-series, a line/bar plot, a distribution, an option-payoff diagram | **mermaid `xychart-beta`** (renders natively in the app), or a labelled ASCII/Unicode plot in a code fence | native render, no toolchain; ASCII when the plot is small or xychart fights you — see the rules below, this is where wrong charts ship | ## Quantitative charts (a chart is a claim — the trap that shipped a wrong graph) A wrong chart is a wrong claim delivered with false confidence. On surfaces where you cannot compile-and-LOOK (mermaid in chat, the lounge), the