Record the 2026-10-19 lint decisions and the UPPER_SNAKE value rule in the agent notes

.agents/memory/lint-config.md

@@ -47,5 +47,37 @@ rules: {
 overrides: projectOverrides,
 ```
 
+## Rule decisions (2026-10-19, all repos)
+
+- `typescript/promise-function-async` is on with `require-await` and
+  `typescript/return-await`. A function that returns a promise is `async`
+  and awaits it: `async f() { const x = await g(); return x; }`. Test
+  doubles do the same (`const resolved = await Promise.resolve(v); return
+  resolved;`), and `expect(promise).rejects` takes the promise itself.
+  `src/processes/child.ts` is exempt in `projectOverrides`: `exitCode` must
+  return the very promise it marks handled, or a failed spawn would surface
+  as an unhandled rejection before callers await it.
+- `init-declarations` is on: an uninitialized `let` becomes
+  `let x: T | null = null;` (`unknown` already includes `null`); a `try` that
+  assigns and a `catch` that exits still narrow it.
+- `no-use-before-define` is on with only `{ functions: false }`.
+- `no-await-in-loop` is off (sequential awaits are intentional) and
+  `unicorn/no-array-reduce` is on: sequential steps are plain `for` loops,
+  never `reduce` chains or recursion.
+- `consistent-return`, `typescript/switch-exhaustiveness-check`, and
+  `default-case` are off: TypeScript's checks cover them, and no `default:`
+  branch is added to an exhaustive switch.
+- `unknown` is allowed; `any` is banned and the `typescript/no-unsafe-*`
+  rules are on. Untrusted data is `unknown` plus a type guard.
+- `unicorn/no-array-for-each` (use `for...of`),
+  `unicorn/prefer-structured-clone`, and `typescript/prefer-nullish-coalescing`
+  (defaults) stay on.
+- explicit-types `upper-snake-string-unions` is on
+  ([[enum-values-upper-snake]]); `unicorn/custom-error-definition` is on, so a
+  custom error has a constructor that sets `this.name`.
+- `src/post/` and `src/profiles/` (code and tests) are exempt from
+  `project/prefer-ascii` in `projectOverrides`: posted Gitea text shows emoji
+  verdict marks and a middle dot.
+
 A new category hit is fixed in the code; an off or exception is added only
 for a real collision or churn, with its reason. Rules: [[project-lint-plugin]].