Why can't you see which skill a subagent actually used when a task quietly goes wrong?

When subagents, especially the Plan subagent, execute, there's no visibility into which skills they invoke, making it hard to diagnose which skill failed or discover what's available at all.

Category: AI / Agents · Trend: Agents · Opportunity score: 6.5 / 10

What is the “Why can't you see which skill a subagent actually used when a task quietly goes wrong?” problem in 2026?

When subagents, especially the Plan subagent, execute, there's no visibility into which skills they invoke, making it hard to diagnose which skill failed or discover what's available at all.

Who has this problem?

Claude Code users building workflows around subagents and skills.

Recorded source context

Dataset source note: Lack of transparency: Users can't see what the subagent is actually doing under the hood... Difficult debugging: When things go wrong, it's hard to diagnose which skill failed or behaved unexpectedly.

This note may summarize the referenced material rather than quote it verbatim. Source label: anthropics/claude-code GitHub issue #12142, PaulRBerg, 22 Nov 2025, closed as duplicate of #5974. (reference).

Existing players in this space

  • Main-agent tool call display: Exists for the top-level agent but not propagated to subagent skill invocations.
  • Verbose/debug logging: Buries the relevant skill-invocation signal in noise.

What existing players are missing

An inline display of skill invocations within subagent output, similar to tool-call visibility for the main agent, so failures can be traced to a specific skill instead of a black-box subagent run.

How Real Problem AI scores this opportunity

Aggregate score: 6.5 / 10. Four-axis rubric:

  • Problem severity: 6 / 10
  • AI feasibility today: 8 / 10
  • Market signal: 5 / 10
  • Competition gap: 7 / 10

How to build a solution: stack hints

  • Subagent execution trace logging
  • Skill-invocation inline UI
  • Expandable trace viewer
  • Debug/diagnostic export

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