feat(routing): W3 tier moves — validator-analyzer opus→sonnet, commit-changer propose=opus override (BDR-077)

validator-analyzer tiered down (deterministic validator-runner + fixed
deduction tables — no deep judgment; supersedes its BDR-076 opus pin).
commit-changer: MODE propose dispatched model="opus" (narrative
reconstruction + capitalize routing = judgment), MODE apply on the sonnet
pin. Typed-pin precedence smoke PASSED: sonnet-pinned verifier dispatched
model="haiku" ran on claude-haiku-4-5 — call-site wins, documented +
now behaviorally proven. Census §11 flip + §16 (106 pass), make test
exit 0.

skills/commit-change/SKILL.md

@@ -18,7 +18,8 @@ allowed-tools:
 
 # /commit-change — propose → confirm → apply dispatcher
 
-Grouping and committing both run on the sonnet-pinned `commit-changer`
+Grouping (propose, `model="opus"` override — judgment) and committing
+(apply, sonnet pin — mechanical) both run on the dispatched `commit-changer`
 subagent (dispatch makes the pin effective). No inline reflection happens
 in this dispatcher to protect, so there is no model gate. This dispatcher
 owns the two approval gates that used to live inside the subagent:
@@ -52,11 +53,15 @@ protected branch.
 ## STEP 1 — Propose
 
 ```
-Agent(subagent_type="commit-changer")
+Agent(subagent_type="commit-changer", model="opus")
 prompt: "MODE: propose
 $ARGUMENTS"
 ```
 
+(`model="opus"` — BDR-077: propose = narrative reconstruction + capitalize
+routing, judgment tier; the call-site override takes precedence over the
+sonnet frontmatter pin. Apply, STEP 4, stays on the pin.)
+
 Read the returned `COMMIT PLAN` + `EDGE CASES` + `CAPITALIZE CANDIDATES`,
 terminated by `READY TO APPLY — awaiting dispatcher confirmation`.