review: route the wiki from the diff, not only from the plan's intent

[choiyounggi]

Problem

The wiki is consulted at plan time only. skills/wiki-plan/SKILL.md and
skills/wiki-query/SKILL.md contain no occurrence of "review", and INDEX.md
opens with:

Route by matching your current task to a "route here when" line

Every review surface in dev-loop therefore reviews a diff with none of the
accumulated failure knowledge routed to it:

Surface	Reviewer	What it actually checks
loop-implement step 6	the session that wrote the code	bugs/edges/leaks + only the pages the plan named
loop-implement step 6.5	independent (pinned model)	test quality only
orchestrate Phase 4 (SKILL.md:479-482)	coordinator	one sentence: "Review each worktree diff"

Proposal

Add a review-time routing pass, symmetric to wiki-plan's decision→page map but
with a different input:

• wiki-plan routes from the intent ("what we set out to build").
• Review must route from what the code actually does — files touched, APIs and
  flags introduced, and the concurrency / IO / schema / auth / process-boundary
  signals visible in the diff.

Then load those pages and check the diff against their failure-mode and edge-case
rows.

The delta is the point. Pages the reviewer routes to that the plan never named
are the unplanned risk surface. If review simply re-reads the plan's decision→page
map, that delta is invisible by construction — which is the current behaviour.

Why this specific gap

From "Reviewing code is a skill"
(read 2026-08-13): the three defects a frontier LLM reviewer missed all required
context outside the diff — a remembered prior incident, the tool version on the
machine that actually runs the code, and cross-object failure ordering. In
dev-loop, the wiki is precisely the container for that context, and review is the
one phase that never opens it.

Scope

• AGENTS.md routing protocol — add the diff-as-input route.
• INDEX.md preamble — "current task" is not the only entry point.
• Consumed by orchestrate: Phase 4 review is one sentence — give it a fixed four-lens pass #82 (the Phase 4 pass); land this first.

Evidence status

Gap is verified by inspection (grep -n "review" skills/wiki-plan/SKILL.md skills/wiki-query/SKILL.md → no matches). The proposed remedy is a design
proposal, not a measured improvement.

Source

• https://typesanitizer.com/blog/code-review.html
• https://news.hada.io/topic?id=32417 (Korean summary)