Summary

When a slash command's template is marked synthetic: true in OpenCode, the user message has no visible parts and is dropped entirely. A companion ignored: true text part (e.g. "Running skill: onboarding") is also discarded because isUserVisiblePart filters out ignored parts. Users get no visual feedback that a skill was triggered.

Problem / goal

Users invoking slash commands should see a short confirmation of what skill was triggered, without the full template cluttering the chat.

Primary user(s)

• Bob (IT / power user)
• Susan (non-technical)
• Other team roles

OpenCode primitive alignment

The TextPart schema already supports synthetic and ignored boolean fields (packages/opencode/src/session/message-v2.ts). This is a companion to anomalyco/opencode#15805 which proposes marking command template parts as synthetic: true and emitting a short ignored: true companion part. OpenWork just needs to surface that ignored part instead of discarding it.

Alignment with VISION/PRINCIPLES/PRODUCT

Keeps the chat clean and focused while preserving transparency about what triggered the assistant's response.

Testability

1. Configure a skill in OpenCode
2. Invoke it via slash command
3. Verify the full template text does not appear in the chat
4. Verify a short italic indicator (e.g. "Running skill: onboarding") appears in the user message area

Ready to build it yourself?

Yes

Additional context

Upstream dependency: anomalyco/opencode#15805. Implementation is ~20 lines in message-list.tsx — extract ignored text parts before the "no renderable parts" check and render as a subtle indicator.