Suggested test: copilot/dynamic-workflows-engine-support #20389

Motivation

Link to the gh-aw PR: github/gh-aw#65937 — Support dynamic workflows in the Copilot CLI engine (engine.dynamic-workflows, enabled by default)

Proposed test

• Workflow file: test-copilot-dynamic-workflows.md (name TBD)
• Trigger: workflow_dispatch
• Engine: copilot (this feature is explicitly Copilot-CLI-specific; also landed for Claude in Support Claude Code dynamic workflows across activation and agent jobs github/gh-aw#65905, so a parallel test-claude-dynamic-workflows.md could follow once this is triaged)
• Safe output: create-issue or noop, just to confirm the agent ran with the dynamic-workflow extension available
• Variant: standard

Minimal test prompt sketch

Configure engine.dynamic-workflows: true (or rely on the new default) so the Copilot CLI session loads the targeted EXTENSIONS feature flag and project-extension discovery. Have the prompt ask the agent to invoke a project-level dynamic workflow/extension bundled in the repo (or confirm its availability) and then create an issue confirming it ran, so the test fails if the extension/workflow restore step silently breaks.

New fixtures or secrets needed

Likely needs a minimal fixture dynamic-workflow/extension file checked into this repo (e.g. under a project extensions folder) for the agent to discover and invoke — the PR mentions "prompt-mode project extension discovery" and restoring supporting files from an activation artifact. Exact fixture shape is unclear without reading the gh-aw engine config docs for this feature in more detail.

Notes

Open questions: (1) what the minimal fixture file/extension needs to look like for Copilot CLI to discover it, (2) whether this is meaningfully different from the existing test-copilot-skills-frontmatter.md coverage (skills vs. dynamic workflows may be adjacent but distinct mechanisms — needs triage), (3) whether a disabled-by-default negative test is also warranted per the PR's "explicitly deny them when disabled" behavior. No existing test or open suggestion currently covers dynamic workflows.

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