v0.15.5 - 2026-08-22

Release Notes

Added

• ag-harness: expose lifecycle observer fan-out and GenAI metrics for agent duration,
  model and tool calls, executed-tool duration, and stable turn outcomes.

Changed

• agentty: show the active agent, model, reasoning level, and speed mode while focused
  reviews are loading.
• agentty: align changed-line focus with the selected file explorer row and review
  comment sidebar.
• ag-agent: require Antigravity CLI 1.1.18 and retain native long-context sessions
  through its persistent NDJSON transport.
• ag-harness: standardize GenAI telemetry metadata against the pinned OpenTelemetry
  semantic convention revision.
• release: bump workspace crate metadata and lockfile package versions to 0.15.5.

Fixed

• ag-agent: normalize Antigravity's string-valued summary fallback before strict
  protocol parsing instead of failing the turn in native schema validation.
• ag-agent: preserve sandboxed plan mode for read-only Gemini sessions while keeping
  utility prompts on standard ACP startup.
• ag-harness: harden unified-diff validation, nested response parsing, request
  preparation, and orchestration cancellation.

Contributors

• @andagaev
• @minev-dev

agentty 0.15.5

Install agentty 0.15.5

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/agentty-xyz/agentty/releases/download/v0.15.5/agentty-installer.sh | sh

Install prebuilt binaries into your npm project

npm install agentty@0.15.5

Download agentty 0.15.5

File	Platform	Checksum
agentty-aarch64-apple-darwin.tar.xz	Apple Silicon macOS	checksum
agentty-x86_64-apple-darwin.tar.xz	Intel macOS	checksum
agentty-aarch64-unknown-linux-gnu.tar.xz	ARM64 Linux	checksum
agentty-x86_64-unknown-linux-gnu.tar.xz	x64 Linux	checksum

Verifying GitHub Artifact Attestations

The artifacts in this release have attestations generated with GitHub Artifact Attestations. These can be verified by using the GitHub CLI:

gh attestation verify <file-path of downloaded artifact> --repo agentty-xyz/agentty

You can also download the attestation from GitHub and verify against that directly:

gh attestation verify <file-path of downloaded artifact> --bundle <file-path of downloaded attestation>

testty 0.15.5

Install testty 0.15.5

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/agentty-xyz/agentty/releases/download/v0.15.5/testty-installer.sh | sh

Install prebuilt binaries into your npm project

npm install @agentty-xyz/testty@0.15.5

Download testty 0.15.5

File	Platform	Checksum
testty-aarch64-apple-darwin.tar.xz	Apple Silicon macOS	checksum
testty-x86_64-apple-darwin.tar.xz	Intel macOS	checksum
testty-aarch64-unknown-linux-gnu.tar.xz	ARM64 Linux	checksum
testty-x86_64-unknown-linux-gnu.tar.xz	x64 Linux	checksum

Verifying GitHub Artifact Attestations

The artifacts in this release have attestations generated with GitHub Artifact Attestations. These can be verified by using the GitHub CLI:

gh attestation verify <file-path of downloaded artifact> --repo agentty-xyz/agentty

You can also download the attestation from GitHub and verify against that directly:

gh attestation verify <file-path of downloaded artifact> --bundle <file-path of downloaded attestation>