fix(chat): stabilize inline tool activity updates

[waleedlatif1]

Summary

• Pace inline activity updates across chat and subagents while keeping history, completion, and requests for input immediate.
• Remove agent prefixes, preserve icons and disclosure animations, and compact related summaries such as “Navigated, read pages.”

Type of Change

• Bug fix

Testing

678 targeted tests passed, including timing, parallel failures, keyboard disclosure, browser favicon retention, and integration icon transitions. Type-check, lint, all 46 audits, block registry, and docs manifest checks passed. Manually checked the browser comparison with a real favicon in light and dark themes, including stable parallel-agent spacing from the first action through completion.

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

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1 Skipped Deployment

Project	Deployment	Actions	Updated
docs	Skipped		Sep 14, 2026 4:26am UTC

[waleedlatif1]

@greptile

[waleedlatif1]

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[greptile-apps]

Confidence Score: 5/5

The PR appears safe to merge.

Summary

• Active labels coalesce updates over a one-second cadence.
• Completion, failures, input requests, and expanded history remain immediate.
• Related actions use shorter shared-object summaries such as “Navigated, read pages.”

Diagram

sequenceDiagram
  participant Stream as Tool stream
  participant Group as AgentGroup
  participant Activity as ActivityStream
  participant User as User
  Stream->>Group: Tool call starts or changes
  Group->>Activity: Label, icon, activity key
  alt Cosmetic active-label change
    Activity-->>User: Keep current label and icon
    Activity-->>User: Show next label after 1 second
  else Failure, stop, skip, completion, or input needed
    Activity-->>User: Update immediately
  end
  User->>Activity: Open disclosure
  Activity-->>User: Show full history immediately

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[waleedlatif1]

@greptile

[waleedlatif1]

@cubic-dev-ai review this PR

[cubic-dev-ai]

@cubic-dev-ai review this PR

@waleedlatif1 I have started the AI code review. It will take a few minutes to complete.

[waleedlatif1]

@greptile

[waleedlatif1]

@cubic-dev-ai review this PR

[cubic-dev-ai]

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@waleedlatif1 I have started the AI code review. It will take a few minutes to complete.