Model variants supplied by plugins are clobbered by late config transform #59836

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1. opencodejr commented on Oct 28, 2026

   

   opencodejrBot

   on Oct 28, 2026

   Contributor

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   Thanks for the detailed report. I reproduced this on 2.2.0, and it still happens on the latest dev (fa1260d).

   Setup:

   • A project-local plugin uses ctx.model.transform to set variants none/low/medium/xhigh (and a marker family) on a config-defined model, myprov/my-model.
   • opencode.json lists that model with no variants and no capabilities.reasoning.

   Result: model.list shows the plugin's family, so the plugin transform ran, but the variants are the generic low/medium/high. The late transform in packages/core/src/config/plugin/provider.ts re-resolves variants for custom models even when an earlier transform has already set them. When I skipped that step for models that already have variants, the plugin's tiers were kept. Your PR #59835 takes that approach.

   One difference from your report: each of my runs used a brand-new data directory and project, so I couldn't check whether locations opened before behave differently.

   The script below reproduces it. Run it with opencode from PATH, or with OC_DEV=<checkout> to run from source.

   Reproduction script (repro.sh)

   #!/usr/bin/env bash
   # Repro for #59836: plugin-supplied model variants are replaced by low/medium/high.
   # Usage: ./repro.sh            (uses `opencode` on PATH)
   #        OC_DEV=/path/to/opencode-checkout ./repro.sh   (runs from source)
   set -euo pipefail
   P=$(mktemp -d /tmp/opencode/proj.XXXX); export HOME=$(mktemp -d /tmp/opencode/home.XXXX)
   mkdir -p "$P/.opencode/plugins"; cd "$P"; git init -q
   cat > .opencode/plugins/spec-pack.ts <<'TS'
   export default {
     id: "spec-pack",
     setup: async (ctx: any) => {
       await ctx.model.transform((models: any) => {
         models.update("myprov", "my-model", (model: any) => {
           model.family = "spec-pack-ran" // proves the plugin transform ran
           model.variants = [{ id: "none" }, { id: "low" }, { id: "medium" }, { id: "xhigh" }]
         })
       })
     },
   }
   TS
   cat > opencode.json <<'JSON'
   {
     "provider": {
       "myprov": {
         "name": "My Provider",
         "npm": "@ai-sdk/openai-compatible",
         "options": { "baseURL": "http://127.0.0.1:9/v1", "apiKey": "x" },
         "models": { "my-model": { "name": "My Model" } }
       }
     }
   }
   JSON
   if [ -n "${OC_DEV:-}" ]; then
     OC=(bun --conditions=browser --preload="$OC_DEV/packages/tui/node_modules/@opentui/solid/scripts/preload.js" "$OC_DEV/packages/cli/src/index.ts")
   else OC=(opencode); fi
   "${OC[@]}" --version
   export OPENCODE_SERVER_PASSWORD=repro-pass
   "${OC[@]}" serve --hostname 127.0.0.1 --port 47123 > serve.log 2>&1 &
   SRV=$!; trap 'kill $SRV 2>/dev/null' EXIT
   for i in $(seq 1 60); do grep -q "listening" serve.log && break; sleep 1; done
   "${OC[@]}" api --server http://127.0.0.1:47123 model.list > models.json
   python3 - <<'PY'
   import json
   for m in json.load(open("models.json"))["data"]:
       if m["providerID"] == "myprov":
           print("family:", m.get("family"), "| variants:", [v["id"] for v in m["variants"]])
           print("expected: ['none', 'low', 'medium', 'xhigh']")
   PY

   Run it: bash repro.sh
2. opencodejr

   added

   reproduced

   on Oct 28, 2026
3. rekram1-node

   closed this as completedin #60097on Oct 30, 2026