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fix: enforce Anthropic-only model routing for all worker dispatch #799

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Merged
marcusquinn merged 1 commit into from
Feb 9, 2026
Merged

fix: enforce Anthropic-only model routing for all worker dispatch #799

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25 changes: 8 additions & 17 deletions .agents/configs/fallback-chain-config.json.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -3,45 +3,36 @@
"_docs": "See .agents/tools/ai-assistants/fallback-chains.md for full documentation",

"chains": {
"_comment": "Per-tier fallback chains. Models tried in order. Only use providers configured in OpenCode (anthropic, google). Never use openrouter (expensive gateway).",
"_comment": "Per-tier fallback chains. Anthropic ONLY. Never use openrouter, openai, or google providers for worker dispatch.",

"haiku": [
"anthropic/claude-haiku-4-5",
"google/gemini-2.5-flash"
"anthropic/claude-haiku-4-5"
],
"flash": [
"google/gemini-2.5-flash",
"anthropic/claude-haiku-4-5"
],
"sonnet": [
"anthropic/claude-sonnet-4-5",
"google/gemini-2.5-pro"
"anthropic/claude-sonnet-4-5"
],
"pro": [
"google/gemini-2.5-pro",
"anthropic/claude-sonnet-4-5"
],
"opus": [
"anthropic/claude-opus-4-6",
"google/gemini-2.5-pro"
"anthropic/claude-opus-4-6"
],
"coding": [
"anthropic/claude-opus-4-6",
"anthropic/claude-sonnet-4-5",
"google/gemini-2.5-pro"
"anthropic/claude-sonnet-4-5"
],
"eval": [
"anthropic/claude-sonnet-4-5",
"google/gemini-2.5-flash"
"anthropic/claude-sonnet-4-5"
],
"health": [
"anthropic/claude-sonnet-4-5",
"google/gemini-2.5-flash"
"anthropic/claude-sonnet-4-5"
],

"default": [
"anthropic/claude-sonnet-4-5",
"google/gemini-2.5-pro"
"anthropic/claude-sonnet-4-5"
]
},

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16 changes: 8 additions & 8 deletions .agents/scripts/fallback-chain-helper.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -257,14 +257,14 @@ get_chain_for_tier() {
# Use the existing model-availability-helper.sh tier mapping
local tier_spec=""
case "$tier" in
haiku) tier_spec='["anthropic/claude-haiku-4-5","google/gemini-2.5-flash"]' ;;
flash) tier_spec='["google/gemini-2.5-flash","anthropic/claude-haiku-4-5"]' ;;
sonnet) tier_spec='["anthropic/claude-sonnet-4-5","google/gemini-2.5-pro"]' ;;
pro) tier_spec='["google/gemini-2.5-pro","anthropic/claude-sonnet-4-5"]' ;;
opus) tier_spec='["anthropic/claude-opus-4-6","google/gemini-2.5-pro"]' ;;
coding) tier_spec='["anthropic/claude-opus-4-6","google/gemini-2.5-pro"]' ;;
eval) tier_spec='["anthropic/claude-sonnet-4-5","google/gemini-2.5-flash"]' ;;
health) tier_spec='["anthropic/claude-sonnet-4-5","google/gemini-2.5-flash"]' ;;
haiku) tier_spec='["anthropic/claude-haiku-4-5"]' ;;
flash) tier_spec='["anthropic/claude-haiku-4-5"]' ;;
sonnet) tier_spec='["anthropic/claude-sonnet-4-5"]' ;;
pro) tier_spec='["anthropic/claude-sonnet-4-5"]' ;;
opus) tier_spec='["anthropic/claude-opus-4-6"]' ;;
coding) tier_spec='["anthropic/claude-opus-4-6","anthropic/claude-sonnet-4-5"]' ;;
eval) tier_spec='["anthropic/claude-sonnet-4-5"]' ;;
health) tier_spec='["anthropic/claude-sonnet-4-5"]' ;;
*)
print_error "Unknown tier: $tier"
return 1
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7 changes: 2 additions & 5 deletions .agents/scripts/supervisor-helper.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -2817,14 +2817,11 @@ resolve_model() {
sonnet|eval|health)
echo "anthropic/claude-sonnet-4-5"
;;
haiku)
haiku|flash)
echo "anthropic/claude-haiku-4-5"
;;
flash)
echo "google/gemini-2.5-flash"
;;
pro)
echo "google/gemini-2.5-pro"
echo "anthropic/claude-sonnet-4-5"
;;
Comment on lines 2817 to 2825
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@gemini-code-assist gemini-code-assist bot Feb 9, 2026

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medium

For better maintainability and to reduce redundancy, you can combine the case statements for tiers that resolve to the same model. The pro tier now resolves to the same model as sonnet, eval, and health.

Suggested change
sonnet|eval|health)
echo "anthropic/claude-sonnet-4-5"
;;
haiku)
haiku|flash)
echo "anthropic/claude-haiku-4-5"
;;
flash)
echo "google/gemini-2.5-flash"
;;
pro)
echo "google/gemini-2.5-pro"
echo "anthropic/claude-sonnet-4-5"
;;
sonnet|eval|health|pro)
echo "anthropic/claude-sonnet-4-5"
;;
haiku|flash)
echo "anthropic/claude-haiku-4-5"
;;

*)
# Unknown tier — treat as coding tier default
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