Add smoke workflow for Copilot SDK inline sub-agent model routing

[Copilot]

This adds a focused smoke workflow to verify Copilot + copilot-sdk: true correctly registers and invokes multiple inline sub-agents with different model providers. The workflow keeps the prompt narrow: ask each sub-agent who am i? and fail the smoke test unless the returned model identity matches exactly.

• New smoke workflow

  • Adds smoke-copilot-sub-agents as a manual smoke test workflow.
  • Uses a Copilot parent agent pinned to gpt-5.3-codex.

• Inline sub-agent coverage

  • Defines three inline sub-agents with distinct model targets:
    • claude-haiku-4.5
    • gpt-5-mini
    • gpt-5-nano
  • Each sub-agent is constrained to return only its own model identity.

• Tight validation path

  • The parent prompt calls each sub-agent exactly once with who am i?.
  • The workflow compares actual vs expected values and emits a compact PASS/FAIL issue for quick triage.

• Compiled workflow output

  • Includes the generated lock file so the new smoke workflow is runnable immediately.

engine:
  id: copilot
  copilot-sdk: true
  model: gpt-5.3-codex

## agent: `haiku-whoami`
---
model: claude-haiku-4.5
---
When asked `who am i?`, reply with exactly:

`claude-haiku-4.5`

[Copilot]

Pull request overview

Adds a new manual smoke-test workflow to validate Copilot SDK inline sub-agent registration/routing by asking each sub-agent who am i? and reporting PASS/FAIL via a created issue.

Changes:

• Added smoke-copilot-sub-agents source workflow (.md) defining three inline sub-agents targeting distinct models and a constrained PASS/FAIL reporting format.
• Added the compiled runnable workflow output (.lock.yml) for the new smoke test.
• Regenerated/updated several existing compiled workflow lock files and made a minor formatting change in an actions setup script.

Show a summary per file

File	Description
actions/setup/js/add_reaction_and_edit_comment.cjs	Minor formatting change in discussion-comment reply handling.
.github/workflows/smoke-copilot-sub-agents.md	New smoke-test workflow spec defining inline sub-agents + expected identity outputs.
.github/workflows/smoke-copilot-sub-agents.lock.yml	Compiled workflow for the new smoke test (runnable immediately).
.github/workflows/uk-ai-operational-resilience.lock.yml	Regenerated lock metadata/body hash (unrelated to new smoke workflow).
.github/workflows/test-quality-sentinel.lock.yml	Regenerated lock metadata/body hash (unrelated to new smoke workflow).
.github/workflows/pr-sous-chef.lock.yml	Regenerated lock metadata/body hash (unrelated to new smoke workflow).
.github/workflows/impeccable-skills-reviewer.lock.yml	Regenerated lock metadata (engine version bump recorded).
.github/workflows/daily-geo-optimizer.lock.yml	Regenerated lock metadata/manifest (scope expansion relative to PR description).

Review details

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• Files reviewed: 8/8 changed files
• Comments generated: 1
• Review effort level: Low

[github-actions]

🎉 This pull request is included in a new release.

Release: v0.82.2