asdf

Squash the current repository state back into one baseline commit while
preserving the README reframing and repository contents.

Constraint: User explicitly requested a single squashed commit with subject "asdf"
Confidence: high
Scope-risk: broad
Reversibility: clean
Directive: This commit intentionally rewrites published history; coordinate before future force-pushes
Tested: git status clean; local history rewritten to one commit; force-pushed main to origin and instructkr
Not-tested: Fresh clone verification after push

src/utils/messagePredicates.ts

@@ -0,0 +1,8 @@
+import type { Message, UserMessage } from '../types/message.js'
+
+// tool_result messages share type:'user' with human turns; the discriminant
+// is the optional toolUseResult field. Four PRs (#23977, #24016, #24022,
+// #24025) independently fixed miscounts from checking type==='user' alone.
+export function isHumanTurn(m: Message): m is UserMessage {
+  return m.type === 'user' && !m.isMeta && m.toolUseResult === undefined
+}