feat: land superpaper v1 notes scaffold

Add the ledger schema, class router, lint codes, ingest/build
pipeline, and three work-tree examples: align derivation,
superfig delegation, and supertensor delegation.

references/agents.md

@@ -0,0 +1,14 @@
+# Agents
+
+Must split when pages > 12 **or** top sections > 4 **or** redraws ≥ 2 **or** the user asks to spawn. Otherwise one agent (including 9–12 pages with ≤4 tops and ≤1 redraw).
+
+Writer jobs are lecture rows in `outline.md`, not `coverage.sections_in`. Outline writes `ledger.yaml`, `outline.md`, `notes.tex` inputs, and `F*.request.md`. Writers only touch their `sec-XX.tex`. Figure agents only see the request.
+
+```
+$superpaper <源> 请 spawn 多 sub agents，隔离上下文：
+  - 1 个 outline agent：ledger.yaml + outline.md
+  - N 个 writer agents：sections/sec-XX.tex
+  - 每个计划重绘图 1 个 figure agent：F*.request.md + sibling skill
+  - 1 个 consistency agent：符号、术语、claim 覆盖
+完成后用 scripts/lint.py 与 build.sh 收口。
+```