fix(chat): preserve async agent display names in traces

[BillLeoutsakosvl346]

Summary

• Resolve wait, tail, steer and interrupt labels from async launch display names instead of shortened IDs.
• Retain only bounded launch identity through chat persistence; keep existing fallbacks and layout unchanged.

Type of Change

• Bug fix

Testing

• 183 focused and adjacent tests pass, including save/load compaction, legacy/span traces and fallback behavior.
• App type-check, lint, 46 audits, docs-manifest and block-registry checks pass.
• Browser-verified real formatter/activity-row components using synthetic fixtures: before/after, settled/running, wait-any, two-digit counts and narrow overflow. This is component-level verification, not a live model conversation.

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 9, 2026 9:26pm UTC

[BillLeoutsakosvl346]

Browser verification

Before/after using the real Sim formatter and activity-row components with synthetic launch data. This is an isolated component preview, not a live model conversation.

The full display name replaces the cut-off ID-derived label; IDs and layout are unchanged.

Wait-any wording and two-digit counts are preserved. Narrow panels still use the existing end ellipsis; old traces without launch metadata retain their fallback. Automated tests separately exercise persistence compaction and reload.

[greptile-apps]

Greptile Summary

This PR preserves bounded async-agent launch identity through chat persistence so control-tool traces can display full agent names rather than truncated IDs.

• Compacts validated launch metadata while continuing to strip other tool output.
• Resolves wait, tail, steer, and interrupt labels from launch display names within the current message.
• Retains existing fallbacks for unknown or malformed launch metadata.
• Adds coverage for live, serialized, reloaded, span-based, legacy, and fallback behavior.

Confidence Score: 5/5

The PR appears safe to merge, with no outstanding actionable findings.

No changes were made after the previous review. The earlier cross-turn concern was manually resolved after BillLeoutsakosvl346 explained that control handles are turn-scoped, rejected across turns, and may reuse IDs, making the message-scoped lookup intentional.

Important Files Changed

Filename	Overview
apps/sim/lib/copilot/chat/async-agent-display.ts	Introduces bounded validation and compaction of async-agent launch identity.
apps/sim/lib/copilot/chat/persisted-message.ts	Retains compact launch identity while stripping other persisted tool-result output.
apps/sim/app/workspace/[workspaceId]/home/components/message-content/message-content.tsx	Builds a message-scoped launch-name map and uses it when formatting async-agent control tools.
apps/sim/lib/copilot/tools/tool-display.ts	Adds optional display-name resolution while preserving humanized-ID fallbacks.
apps/sim/app/workspace/[workspaceId]/home/components/message-content/message-content.test.ts	Covers live, serialized, persisted, span-based, malformed, and fallback display-name behavior.
apps/sim/lib/copilot/chat/persisted-message.test.ts	Verifies that only bounded successful async-launch identity survives persistence compaction.
apps/sim/lib/copilot/tools/tool-display.test.ts	Verifies full display names, wait modes, counts, and unknown-ID fallbacks.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart LR
  A[Async agent launch result] --> B[Validate and compact identity]
  B --> C[Persist agent ID and display name]
  C --> D[Reload message blocks]
  B --> E[Parse live message blocks]
  D --> F[Build message-scoped name map]
  E --> F
  F --> G[Resolve control-tool title]
  G --> H[Display full agent name]

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[BillLeoutsakosvl346]

@greptile

[BillLeoutsakosvl346]

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[cubic-dev-ai]

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