The single per-task «Complexity» pin was the wrong shape — what you actually
decide is WHICH model serves a task at WHICH complexity. A task rule is now a
per-tier map, edited in the console as rows of “model ▾ + complexity ▾” pairs
(plus ×/add) inside each task:
[routing.tasks.code]
low = ["cheap-coder"]
high = ["best-coder"]
any = ["generic-coder"] # leads at every tier after the tier pick
Chain order: the task's tier-specific list → (at high: the global high chain,
so escalation still beats any-tier pins) → the task's any-tier list → the
global tier chain → default as the last resort; deduplicated. Plain-array
rules keep meaning "any tier" unchanged, and the short-lived {models, tier}
form from the previous commit is normalized into the map on load.
Verified live: legacy config migrated visibly in the editor, pairs survive
save+reload, a math prompt at low ignored the math@high pair, per-tier leads
confirmed by unit tests (19 passing).