v0.8.0

Ghostlight v0.8.0 -- governed browser automation for AI agents.

A native Rust service, protocol-versioned MCP edge, and thin Chromium adapter that give an AI
agent controlled access to your real, authenticated browser session, with an opt-in governance
layer (capability grants, sacred domains, audit). See the README and docs/guides/ for the
full walkthrough.

What's changed

The v0.8.0 candidate makes the MCP edge explicitly protocol-versioned, leaves the service kernel
protocol-neutral, and makes browser tab continuity match what users see in Chrome.

Added

• MCP 2026-07-28 support (ADR-0096). The local stdio edge implements the 2026 discovery and
  request-metadata lifecycle alongside MCP 2025-11-25. The protocol-neutral service does not parse
  MCP JSON-RPC or retain MCP request ids.
• Local MCPB packaging (ADR-0095). Release assembly now produces a self-contained Claude
  Desktop package with the same local-only service and Chrome Web Store adapter boundary.
• Browser-created tab continuity (ADR-0099). Opted-in browser results report a bounded tab
  delta. The service validates and claims a still-open child before returning its composite tab id,
  so an agent can use that id immediately without a separate context refresh.

Changed

• Three explicit executable roles (ADR-0096). MCP clients launch
  ghostlight-mcp-connector, the persistent protocol-neutral service remains ghostlight, and
  Chromium launches ghostlight-browser-connector. The old dual-role ghostlight-relay path is
  removed rather than retained as a compatibility alias.
• Extension-owned Chrome topology (ADR-0098). The extension owns native Chrome window, group,
  and placement mechanism. The service sends only logical workspace authority and presentation
  intent, so user-moved tabs and groups stay where the user put them.
• Major/minor adapter contract (ADR-0093). Chrome adapter v0.8.0 covers every Ghostlight
  service v0.8.x patch. Compatible adapter and service patches can ship independently; a contract
  change advances the minor for both components.
• Exact-title tab groups are reused for presentation without merging workspace authority or tab
  inventories.

Fixed

• A browser-created child with one exact managed opener is passively adopted into that workspace,
  while guessed, ambiguous, and cross-workspace tabs remain inaccessible.
• Closed MCP transports now tell the agent to reconnect through its current client instead of
  spawning a standalone connector that creates a different workspace and duplicate browser tabs.
• Moving a managed tab or whole group into another Chrome window no longer causes context lookup
  or addressed navigation to create replacement tabs or groups.

Install

1. Install the service and register detected MCP clients: npx -y ghostlight install.
2. Install Ghostlight in Browser
   from the Chrome Web Store.
3. Restart your MCP client, then verify the whole chain with npx ghostlight doctor.

Each platform archive contains the persistent ghostlight service, the protocol-versioned
ghostlight-mcp-connector stdio edge, and the browser-only ghostlight-browser-connector native host. MCP clients
must start ghostlight-mcp-connector; the removed ghostlight-relay --role agent path is not a fallback.

End-to-end verified on Windows and Linux. macOS builds and passes the full test suite in CI;
live-browser verification there is still owed.

Verify

Every archive carries a signed build-provenance attestation (GitHub Artifact
Attestations / Sigstore). Prove an artifact was built by this repo's release workflow,
not a mirror or a tampered copy:

gh attestation verify <archive> --repo sylin-org/ghostlight

The SHA-256 checksums are below (the attestation is the stronger, signed check).

Downloads

Platform	Architecture	Download
Windows	x86_64	ghostlight-v0.8.0-x86_64-pc-windows-msvc.zip
macOS	Apple Silicon	ghostlight-v0.8.0-aarch64-apple-darwin.tar.gz
macOS	Intel	ghostlight-v0.8.0-x86_64-apple-darwin.tar.gz
Linux	x86_64	ghostlight-v0.8.0-x86_64-unknown-linux-gnu.tar.gz
Chrome adapter	any	ghostlight-extension-v0.8.0.zip
Claude Desktop MCPB	Windows/macOS	ghostlight-v0.8.0.mcpb

Checksums (SHA-256)

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