[ca] Update CLI versions: Claude Code 2.1.66, Copilot CLI 0.0.421, MCP Gateway v0.1.8 #19568
Description
Summary
3 CLI/MCP updates detected and applied to pkg/constants/constants.go on 2026-03-04. make recompile completed successfully, updating 165 workflow lock files.
| Tool | Previous | New | Risk |
|---|---|---|---|
| Claude Code | 2.1.63 | 2.1.66 | Low |
| Copilot CLI | 0.0.420 | 0.0.421 | Medium (integration test recommended) |
| MCP Gateway | v0.1.7 | v0.1.8 | Low |
Update Claude Code 2.1.63 → 2.1.66
Version: 2.1.63 → 2.1.66 (intermediate: 2.1.64, 2.1.65, 2.1.66)
Release Timeline:
- 2.1.63: 2026-02-28
- 2.1.64: 2026-03-03
- 2.1.66: 2026-03-04
View Full Changelog
CLI Discovery
No changes detected in --help output between 2.1.63 and 2.1.66. All flags and subcommands are identical.
Breaking Changes
None detected.
Notes
Claude Code has no public GitHub repository. Version metadata sourced from NPM registry only. The help output between 2.1.63 and 2.1.66 is identical, suggesting internal bug fixes or performance improvements.
View Migration Guide
No migration steps required. Drop-in replacement.
Impact Assessment
- Risk: Low
- Affects: All Claude engine workflows
- CLI interface: Unchanged
Package Links
Update Copilot CLI 0.0.420 → 0.0.421
Version: 0.0.420 → 0.0.421
WARNING: Upgrading Copilot CLI requires a full integration test run to ensure compatibility.
View Full Changelog
CLI Discovery
One new flag detected in --help output:
New flag:
--plugin-dir (directory) Load a plugin from a local directory (can
be used multiple times)
```
### Subcommand Changes
- `config` help: No changes
- `environment` help: No changes
### Breaking Changes
None detected.
### Model List (unchanged)
Available models in both 0.0.420 and 0.0.421:
- claude-sonnet-4.6, claude-sonnet-4.5, claude-haiku-4.5
- claude-opus-4.6, claude-opus-4.6-fast, claude-opus-4.5
- claude-sonnet-4, gemini-3-pro-preview
- gpt-5.3-codex, gpt-5.2-codex, gpt-5.2
- gpt-5.1-codex-max, gpt-5.1-codex, gpt-5.1, gpt-5.1-codex-mini
- gpt-5-mini, gpt-4.1
</details>
<details>
<summary><b>View Migration Guide</b></summary>
1. Run full integration test suite after deploying
2. New `--plugin-dir` flag is additive — no existing workflows affected
</details>
### Impact Assessment
- Risk: **Medium** (per project policy: Copilot upgrades require integration tests)
- Affects: All Copilot engine workflows
- New capability: `--plugin-dir` for loading local plugins
### Package Links
- NPM Package: https://www.npmjs.com/package/`@github/copilot`
---
### Update MCP Gateway v0.1.7 → v0.1.8
**Version**: v0.1.7 → v0.1.8
**Release Date**: 2026-03-04
<details>
<summary><b>View Full Changelog</b></summary>
### Release Highlights (from GitHub)
**Bug Fix**: HTTP backend session ID correctness — MCP Gateway now correctly uses the server-issued session ID when making `tools/list` calls to HTTP backends, rather than a client-generated ID. This resolves a subtle protocol compliance issue that could cause tool discovery to fail with HTTP-mode MCP servers.
### What's Changed
- fix: use server-issued session ID for HTTP backend tools/list by `@lpcox` in https://github.com/github/gh-aw-mcpg/pull/1559
- Add daily GHCR download tracker workflow by `@Copilot` in https://github.com/github/gh-aw-mcpg/pull/1560
- Improved test coverage for `server.setupSessionCallback`, `server.withResponseLogging`, and `config/validation_env` package
- Added debug logging to `writeGatewayConfig` for easier gateway startup diagnostics
### Docker Image
```
ghcr.io/github/gh-aw-mcpg:v0.1.8
View Migration Guide
No migration steps required. The session ID fix is transparent to existing workflows using HTTP-mode MCP servers.
Impact Assessment
- Risk: Low
- Affects: Workflows using MCP Gateway with HTTP-backend MCP servers
- Fix: Improves protocol compliance for HTTP-mode MCP servers
Package Links
- Release Notes: https://github.com/github/gh-aw-mcpg/releases/tag/v0.1.8
Recommendations
- Claude Code: Low-risk update, deploy immediately
- Copilot CLI: Run full integration test suite before deploying to production
- MCP Gateway: Low-risk bug fix, deploy immediately
References:
Generated by CLI Version Checker · ◷
- expires on Mar 6, 2026, 10:03 AM UTC