[Copilot]

Test Coverage Improver failed before agent startup: live compatibility resolution selected Copilot CLI 1.0.101, but the pinned setup action had no reviewed checksum for that release.

• Pin runtime: Set engine.version to 1.0.98, which the existing setup action can verify.
• Regenerate lock: Pass the explicit version to the installer, bypassing live compatibility resolution while preserving checksum verification, action pins, permissions, and sandbox controls.

• Fixes [aw] Test Coverage Improver: failed before agent execution started #15436

[Copilot]

🔵 Needs a closer look

Source and lock agree, but the pinned installer’s checksum support could not be independently verified.

No open issues 🎉

What changed in this PR

Pins Test Coverage Improver’s Copilot CLI to address the installation failure reported in #15436, which prevented agent startup.

Changes:

• Select Copilot CLI 1.0.98 explicitly in the workflow source.
• Regenerate the lock file to pass that version directly to the installer and report it in runtime metadata, without changing existing security controls.

File	Description
.github/​workflows/​test-coverage-improver.md	Pins the Copilot engine version to 1.0.98.
.github/​workflows/​test-coverage-improver.lock.yml	Updates the installer argument, version metadata, and source hash.

_{Review effort: Max}

[lpcox]

@copilot merge main, resolve conflicts, and address review feedback

[Copilot]

@copilot merge main, resolve conflicts, and address review feedback

Merged main and regenerated the lock from the pinned 1.0.98 source using the updated v0.93.2 setup action. I verified the pinned installer sources a release-integrity manifest with a reviewed 1.0.98 checksum-manifest digest and validates it before installation. The merge is e396f65; the conflict-free lock repair is 8cde707.