cleanup phases 6

docs/roadmap/tech-debt.md

@@ -1,7 +1,7 @@
 # Tech debt — what it costs to not pay this yet
 
 > Last verified: 2026-08-02 against commit `cd8144e`. Populated by phase 5 of the
-> [documentation clean-up chain](../_plan/README.md).
+> [documentation clean-up chain](../../archive/clarify-chain/README.md).
 
 Debt is different from [backlog.md](../status/backlog.md): a backlog item blocks a specific flow. A debt item
 doesn't block anything today — it raises the cost of *everything that comes after it*. The phase brief named
@@ -136,7 +136,7 @@ commit it, then delete the workaround line. **Rough size: S.** Cheapest item on
 
 ## What didn't make this list
 
-`docs/_plan/README.md`'s own diagnosis (260+ markdown files, ~10 rule sources, contract drift) is the
+[`archive/clarify-chain/README.md`](../../archive/clarify-chain/README.md)'s own diagnosis (260+ markdown files, ~10 rule sources, contract drift) is the
 documentation debt this entire phase chain exists to retire — phases 0-4 already paid most of it down, and
 phase 6/7 finish the job. It isn't repeated here because it isn't *code* debt, and because tracking it twice
 would just be two ledgers again, the exact problem this chain was created to end.