Zen muse-spark-*: tool-call continuation 400s with reasoning encrypted_content was not issued to this caller

[morpheus9393]

Zen muse-spark-*: tool-call continuation 400s with reasoning encrypted_content was not issued to this caller

Error

Opencode failed to send message with error: Error from provider (Console):
Upstream request failed: [invalid_request_error] reasoning encrypted_content was not issued to this caller

Model: opencode/muse-spark-1.3-contributor-free (also 1.2) via Zen / free.
Only observed with muse-spark-*, other models on same setup are fine.

Repro

1. Use opencode/muse-spark-1.3-contributor-free.
2. First turn without tools succeeds.
3. Any follow-up turn that replays previous assistant reasoning items together with tool results fails with the 400 above.
4. Affected in particular are subagents / council seats with reasoning variant (xhigh) + tool calls; the plain main session without tool continuation keeps working.

Root cause (suspected)

muse-spark-* on opencode-zen (and opencode-go) goes through the OpenAI Responses lane with includeEncryptedReasoning: true by default, so every tool-call continuation replays reasoning.encrypted_content that the gateway cannot round-trip (bound to the gateway caller) -> upstream 400.

Reference with exact same error text and a client-side fix in a different client layer: oh-my-pi issue #11928, fixed in 18.1.19 via deployment contract include-encrypted-reasoning #false + filter-reasoning-history #true (opencode-zen.kdl). Plain OpenCode has no equivalent user-facing option (provider.<id>.models.<id>.options documents only baseURL/apiKey/headers/provider.*/limit; no reasoning include/filter key), so users cannot work around it locally except by removing the model.

Expected

For Zen muse-spark-* SKUs OpenCode should either not request reasoning.encrypted_content or strip native reasoning items on history replay (same as the referenced fix), so tool-call continuations work.

Workaround used

Remove opencode/muse-spark-* from fallback chains / switch preset; fresh sessions only help until the first tool-call turn.

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• [Bug] muse-spark-1.3-contributor-free: reasoning encrypted_content was not issued to this caller when switching models in same session #48805: [Bug] muse-spark-1.3-contributor-free: reasoning encrypted_content was not issued to this caller when switching models in same session
• Getting Error from provider (Console): Upstream request failed: [invalid_request_error] reasoning encrypted_content was not issued to this caller #48973: Getting Error from provider (Console): Upstream request failed: [invalid_request_error] reasoning encrypted_content was not issued to this caller
• Muse Spark 1.3: resuming a session after idle fails with reasoning encrypted_content not issued to this caller #48915: Muse Spark 1.3: resuming a session after idle fails with reasoning encrypted_content not issued to this caller
• [Bug] Muse Spark 1.3 Free (Xhigh): reasoning encrypted_content error on follow-up prompts with images #48947: [Bug] Muse Spark 1.3 Free (Xhigh): reasoning encrypted_content error on follow-up prompts with images
• [regression 2026-09-15] muse-spark-1.3-contributor-free: encrypted_content was not issued to this caller en chats nuevos de 2-3 mensajes #49188: [regression 2026-09-15] muse-spark-1.3-contributor-free: encrypted_content was not issued to this caller en chats nuevos de 2-3 mensajes
• Opencode Zen critical errors on Muse Spark family when model recieves a image/does a tool call #48741: Opencode Zen critical errors on Muse Spark family when model receives a image/does a tool call

There appear to be many open reports of this same reasoning encrypted_content was not issued to this caller error with muse-spark-* models. You may want to follow one of the above issues for updates rather than tracking this separately.

[morpheus9393]

Closing as duplicate of #48741, which is the main tracking thread for this exact error (Zen muse-spark encrypted_content replay). See also fix PR #48918.