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Copilot CLI update: chronicle, plugins, and fleet mode

GitHub Checkout

In this episode of GitHub Checkout, we sit down with Copilot CLI Product Manager Ryan Hecht to explore the latest experimental features. We cover the plugin marketplace, the /chronicle slash command for self-healing prompts, and how to run Claude Opus 4.6, GPT-5.4, and Gemini 3 simultaneously. We also walk through how /fleet mode and autopilot can handle massive refactoring tasks while you step away.

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A database is a structured set of data held in a computer, usually a server.
Slack + GitHub screenshot

This recommendation was created by GitHub staff

Slack + GitHub

Bring your code to the conversations you care about with the GitHub and Slack app. A separate Slack subscription is required. With two of your most important workspaces connected, you’ll get updates about what’s happening on GitHub—without leaving Slack.

Trending repository

An open-source long-horizon SuperAgent harness that researches, codes, and creates. With the help of sandboxes, memories, tools, skill, subagents and message gateway, it handles different levels of tasks that could take minutes to hours.

  • Updated Jun 21, 2026
  • Python
codebase-memory-mcp

Trending repository

High-performance code intelligence MCP server. Indexes codebases into a persistent knowledge graph — average repo in milliseconds. 158 languages, sub-ms queries, 99% fewer tokens. Single static binary, zero dependencies.

  • Updated Jun 20, 2026
  • C
Anthropic-Cybersecurity-Skills

Trending repository

754 structured cybersecurity skills for AI agents · Mapped to 5 frameworks: MITRE ATT&CK, NIST CSF 2.0, MITRE ATLAS, D3FEND & NIST AI RMF · agentskills.io standard · Works with Claude Code, GitHub Copilot, Codex CLI, Cursor, Gemini CLI & 20+ platforms · 26 security domains · Apache 2.0

  • Updated Jun 20, 2026
  • Python

Trending repository

Cognee is the open-source AI memory platform for agents. Give your AI agents persistent long-term memory across sessions with a self-hosted knowledge graph engine.

  • Updated Jun 21, 2026
  • Python
system_prompts_leaks

Trending repository

Extracted system prompts from Anthropic - Claude Fable 5, Opus 4.8, Claude Code, Claude Design. OpenAI - ChatGPT 5.5 Thinking, GPT 5.5 Instant, Codex. Google - Gemini 3.5 Flash, 3.1 Pro, Antigravity. xAI - Grok, Cursor, Copilot, VS Code, Perplexity, and more. Updated regularly.

  • Updated Jun 21, 2026
  • JavaScript

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Pull Request Size

Introducing size labels for Pull Requests! Apply labels to Pull Requests based on the total lines of code changed (additions + deletions).