bug(v2): SAP AI Core initialization fails  #54791

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1. ton618to

   changed the title [-]bug(v2): SAP AI Core initialization fails after Babel stack rewriting on Bun 1.4.2[/-] [+]bug(v2): SAP AI Core initialization fails [/+] on Oct 12, 2026
2. opencode-agent commented on Oct 12, 2026

   

   opencode-agentBot

   on Oct 12, 2026 – with OpenCode Agent

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   Thanks for the detailed report. I reproduced this on the latest dev (bcf23b6) under Bun 1.4.2.

   What I ran: a headless server started from packages/cli with bun run src/index.ts serve, which loads the @opentui/solid/preload preload. It used an in-memory database, a temporary config directory, project config disabled and a fake AICORE_SERVICE_KEY. Every /api/experimental/generate call for sap-ai-core/anthropic--claude-4.8-opus returned:

   Cannot initialize sap-ai-core/anthropic--claude-4.8-opus: First argument must be an Error object
   

   Your diagnosis holds:

   • After OpenTUI's transformSolidSource runs, Error.prepareStackTrace is Babel's stackTraceRewriter, and importing @jerome-benoit/sap-ai-provider-v2@5.0.3 throws from follow-redirects.
   • Without the transform, or with the original prepareStackTrace restored, the import works.

   The released @opencode/cli@2.0.26 binary is not affected. With the same setup it gets past initialization and only fails later at the token request, as expected with fake credentials. So this seems limited to running from source with the Solid preload, which ties it to the Bun bug you linked (oven-sh/bun#41151).

   The script below reproduces it against a source checkout (dev mode) or an installed release (release mode).

   Reproduction script (server.sh)

   #!/usr/bin/env bash
   # Reproduce #54791 against a headless opencode server.
   # Usage: server.sh release   -> uses `opencode` from PATH (e.g. @opencode/cli@2.0.26)
   #        server.sh dev <repo> -> runs packages/cli/src/index.ts from a source checkout (bunfig preloads @opentui/solid/preload)
   set -u
   MODE=${1:-release}; REPO=${2:-/workspace/repo}; PORT=${PORT:-4610}
   TMP=$(mktemp -d); mkdir -p "$TMP/cfg" "$TMP/proj"
   export OPENCODE_DB=:memory: OPENCODE_CONFIG_DIR="$TMP/cfg" OPENCODE_DISABLE_PROJECT_CONFIG=1
   export AICORE_SERVICE_KEY='{"clientid":"x","clientsecret":"y","url":"https://auth.example.invalid","serviceurls":{"AI_API_URL":"https://api.example.invalid"}}'
   if [ "$MODE" = dev ]; then
     (cd "$REPO/packages/cli" && exec bun run src/index.ts serve --hostname 127.0.0.1 --port $PORT) > "$TMP/log" 2>&1 &
   else
     (cd "$TMP/proj" && exec opencode serve --hostname 127.0.0.1 --port $PORT) > "$TMP/log" 2>&1 &
   fi
   SRV=$!
   for i in $(seq 1 60); do grep -q password "$TMP/log" && break; sleep 1; done
   cat "$TMP/log"
   P=$(grep password "$TMP/log" | awk '{print $3}')
   for i in 1 2 3; do
     curl -s -u opencode:$P -X POST http://127.0.0.1:$PORT/api/experimental/generate \
       -H 'content-type: application/json' -H "x-opencode-directory: $TMP/proj" \
       -d '{"prompt":"hi","model":{"providerID":"sap-ai-core","id":"anthropic--claude-4.8-opus"}}'; echo
     sleep 3
   done
   kill $SRV 2>/dev/null

   Run it: bash server.sh
3. opencode-agent

   added

   reproduced

   on Oct 12, 2026