diff --git a/docs/comprehension-history.md b/docs/comprehension-history.md
index 8c0bc38..c7a53cc 100644
--- a/docs/comprehension-history.md
+++ b/docs/comprehension-history.md
@@ -24,3 +24,28 @@ Inherited architect, decided by:
 - `src/markdown/parse/markdown-to-adf.ts:113` `readBlock`: branches name the claim (`claims.alerts`, `claims.taskMarkers`)
 - `src/index.ts:5` exports: flavour names say which file to open
 - `src/markdown/portable/conventions.ts:3` `flavourClaims`: cost, all three flavours' rows live under `portable/`
+
+## 2026-10-09T00:56:04Z, PR #19 at 5fc877e, against 9519606
+
+Ruling: better
+
+| Seat | Vote |
+|---|---|
+| Mid A | better |
+| Inherited architect | better |
+
+Mid A, decided by:
+
+- `src/markdown/portable/conventions.ts:8` `flavourClaims`: one table says what each flavour reads; every gate reads a named field
+- `src/markdown/portable/task-ids.ts:7` `mintTaskIds`: one pass, no carried set crossing modules
+- `src/index.ts:5` exports: each name says which markdown it means
+- `src/markdown/parse/markdown-to-adf.ts:161` `quoteNode`: no reach into the portable writer's reduction
+- `src/markdown/portable/conventions.ts:20` `ReadClaims`: cost, `directiveNode` leans on a type in another file
+
+Inherited architect, decided by:
+
+- `src/markdown/portable/task-ids.ts:6` `mintTaskIds`: the retry loop and the parser-filled set are gone
+- `src/markdown/parse/markdown-to-adf.ts:26` `Reading`: no hidden state; branches name the feature they gate
+- `src/markdown/portable/conventions.ts:8` `flavourClaims`: cost, the table for all three flavours lives under `portable/`
+- `src/markdown/emit/line-escaping.ts:92` `escapeClaims`: directive escaping under the flag the parser checks
+- `src/markdown/emit/adf-to-markdown.ts:146` `spellPortableBlock`: no hard-coded lossless title