Pure move, no behaviour change. First of ~7 PRs decomposing the combo.ts
god-file (#3501).
handleComboChat evaluates a series of dispatch branches before it ever
reaches target resolution or the sequential attempt loop. None of them
iterate targets in priority order or need the failover/retry/credential
gate machinery that follows, so they move to a leaf:
- context-cache pin routing (Fix#679), including the
pinIsDurablyUnhealthy / isPinnedModelDurablyUnhealthy health gate
- fusion panel dispatch + the #6455 misconfiguration warn
- pipeline chaining
- nested combo-ref execute-mode runtime-unit dispatch
Only the chaos and round-robin hand-offs stay inline (11 and 13 lines);
extracting those would be pure indirection.
open-sse/services/combo.ts 3642 -> 3341 (-301)
open-sse/services/combo/dispatchPrelude.ts: 619 (under the 800 cap)
Each helper keeps the fall-through protocol the inline blocks had: return
a Response to OWN the request, return null to fall through. A flipped
null/Response would silently bypass the whole combo strategy, so the new
tests pin both directions for every branch.
combo.ts re-exports pinIsDurablyUnhealthy so combo-pin-health-gate.test.ts
keeps resolving. The leaf takes handleComboChat as a `runCombo` parameter
instead of importing it, so combo/ keeps zero back-edges into combo.ts.
Complexity-neutral: the first cut added +3 violations (two
max-lines-per-function, one complexity) inside the new leaf, so
evaluatePinnedResponse, orderRuntimeUnits, recordRuntimeUnitStickySuccess
and buildBaseOptions were split out. check:complexity now measures 2169
and check:cognitive-complexity 956 — identical to the pristine base.
Co-authored-by: diegosouzapw <diegosouzapw@users.noreply.github.com>
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