feat(opencode): show actual model per turn - #6551
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📝 WalkthroughWalkthroughOpenCode now reports the model used for each assistant turn. The value flows through orchestration contracts, persistence, projections, client state, and web/mobile message metadata. ChangesActual model attribution
Estimated code review effort: 3 (Moderate) | ~25 minutes Mergeability Score: 🔵 Low · up to This PR adds optional per-turn model attribution across ingestion, persistence, and web/mobile display. It is mergeable with owner awareness: a timing edge case could omit the model label, long identifiers may be inaccessible when truncated, desktop display should be confirmed, and the fixed test timeout could cause flaky CI. Sequence Diagram(s)sequenceDiagram
participant OpenCodeAdapter
participant ProviderRuntimeIngestion
participant ProjectionThreadMessages
participant ClientRuntime
participant MessagesTimeline
OpenCodeAdapter->>ProviderRuntimeIngestion: Emit turn.completed with actualModel
ProviderRuntimeIngestion->>ProjectionThreadMessages: Project terminal assistant message
ProjectionThreadMessages->>ClientRuntime: Send message with actualModel
ClientRuntime->>MessagesTimeline: Render assistant metadata
Suggested reviewers: 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches 💡 1🛠️ Fix failing CI checks 💡
🧪 Generate unit tests (beta)
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Actionable comments posted: 2
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Inline comments:
In `@apps/server/src/provider/Layers/OpenCodeAdapter.test.ts`:
- Line 1137: Remove the one-second Effect.timeout from the Fiber.join call in
the events collection test, relying on Stream.take(4) to determine completion
while preserving the existing event collection behavior.
In `@apps/web/src/components/chat/MessagesTimeline.tsx`:
- Around line 1126-1133: Update the actualModel display in MessagesTimeline to
use the existing accessible Tooltip pattern, wrapping the truncated paragraph
and exposing the full model identifier in the tooltip content; preserve the
current truncation styling and conditional rendering.
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📒 Files selected for processing (20)
apps/mobile/src/features/threads/ThreadFeed.tsxapps/server/src/orchestration/Layers/ProjectionPipeline.tsapps/server/src/orchestration/Layers/ProjectionSnapshotQuery.tsapps/server/src/orchestration/Layers/ProviderRuntimeIngestion.test.tsapps/server/src/orchestration/Layers/ProviderRuntimeIngestion.tsapps/server/src/orchestration/decider.tsapps/server/src/orchestration/projector.tsapps/server/src/persistence/Layers/ProjectionThreadMessages.test.tsapps/server/src/persistence/Layers/ProjectionThreadMessages.tsapps/server/src/persistence/Migrations.tsapps/server/src/persistence/Migrations/041_ProjectionThreadMessageActualModel.test.tsapps/server/src/persistence/Migrations/041_ProjectionThreadMessageActualModel.tsapps/server/src/persistence/Services/ProjectionThreadMessages.tsapps/server/src/provider/Layers/OpenCodeAdapter.test.tsapps/server/src/provider/Layers/OpenCodeAdapter.tsapps/web/src/components/chat/MessagesTimeline.test.tsxapps/web/src/components/chat/MessagesTimeline.tsxpackages/client-runtime/src/state/threadReducer.tspackages/contracts/src/orchestration.tspackages/contracts/src/providerRuntime.ts
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ApprovabilityVerdict: Needs human review This PR introduces a new user-facing feature (displaying actual model per turn) with new state tracking logic, event enrichment, database migration, and UI changes across multiple platforms. New features with cross-cutting behavior changes warrant human review. You can customize Macroscope's approvability policy. Learn more. |
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Reviewed by Cursor Bugbot for commit 39137e4. Configure here.
1 participant
Closes #6536.
OpenCode can route a stable alias to different backend models, but T3 only showed the requested alias. This preserves the optional model ID from OpenCode's completed step, carries it through the event and projection layers, and shows it below the assistant turn on web, desktop, and mobile.
Older messages and providers that do not report an actual model keep the existing UI. The field is optional and persisted through SQLite migration 041 and snapshot hydration.
This depends on anomalyco/opencode#42433 for OpenCode to emit the structured step-finish model ID.
Testing:
Screenshots
Before
After
Model: GPT-5
Harness: Codex Desktop
Note
Show actual model used per turn in assistant messages
actualModelthrough the full stack: contracts, provider adapter, orchestration, persistence, and both web and mobile UIs.step-finishparts and attaches it toturn.completedevents; it handles cases where model metadata arrives after the turn completes by deferring emission.actual_modeltoprojection_thread_messages, withCOALESCE-based upserts to preserve the value across partial updates.Model: <actualModel>with a tooltip on completed assistant messages; the mobile feed (ThreadFeed.tsx) shows the same label inline.Macroscope summarized 3437ed1.
Summary by CodeRabbit
New Features
Bug Fixes
Tests
Note
Medium Risk
Touches orchestration ingestion, event projection, and SQLite schema across the message path; changes are additive/optional but span critical turn-completion and persistence logic.
Overview
Shows which backend model actually ran when OpenCode resolves an alias (e.g. auto → a concrete model ID), instead of only the user’s requested selection.
The stack gains an optional
actualModelon orchestration messages andturn.completedpayloads. OpenCodeAdapter reads it fromstep-finishparts, can emit a follow-upturn.completedif model metadata arrives after idle, and maps message→turn without rebinding to newer active turns. Provider runtime ingestion attachesactualModelwhen finalizing the terminal assistant message for a turn (including a fallback when tracking is empty but a completed assistant row exists).Persistence: migration 041 adds nullable
actual_modelonprojection_thread_messages; upserts use COALESCE so partial updates do not wipe stored model names. Projection pipeline, projector, snapshot queries, and client threadReducer all carry the field through.UI: web MessagesTimeline and mobile ThreadFeed render
Model: …on completed assistant turns when present; copy/timestamp controls stay hover-only on web. Messages without provider-reported model are unchanged.Reviewed by Cursor Bugbot for commit 3437ed1. Bugbot is set up for automated code reviews on this repo. Configure here.