itd-39 extends a Python prompt-router hook; the ahoy chapter says every hook event command is a shim that finds and runs the abcd binary

itd-39 extends a Python prompt-router hook; the ahoy chapter says every hook event command is a shim that finds and runs the abcd binary

A premise contradiction (severity minor) found by the cross-document consistency pass.

• End A: .abcd/development/brief/04-surfaces/01-ahoy.md:663 — "resolving shim rather than a plain binary call."
• End B: .abcd/development/intents/planned/itd-39-scope-aware-memory-retrieval.md:33 — "hooks/prompt_router_hook.py (itd-3) is extended from rules-only to rules + memory"

itd-39 scopes memory recall as extending hooks/prompt_router_hook.py (itd-3) from rules only to rules plus memory. The ahoy chapter describes the shipped hook manifest: nine event types, each event command a resolving shim rather than a plain binary call, with UserPromptSubmit provisioning the plugin-root binary when it is missing. So the prompt router that hook runs is the abcd binary. The planned work names a hook file the shipped surface does not have.

Evidence: .abcd/work/reviews/2026-10-26-consistency/00-summary.md, finding 373.