GitHub Copilot CLI reads your CLAUDE.md and ships Vim mode GA
Two releases in a day let custom agents share one instructions file across your CLI tools, bring native modal editing, and stop resumes from dropping plugins.
Copy markdown
The setting to flip
v1.0.86-1 lets custom agents opt into your repository instruction files — AGENTS.md, copilot-instructions.md, and CLAUDE.md — with `include-custom-instructions: true` in their frontmatter. The upshot: the same instructions file you already keep for Claude Code now feeds Copilot's custom agents, so you stop maintaining parallel configs per tool.
Vim mode is now GA
v1.0.85 makes native modal editing generally available — turn it on with `/vim` or set `editorMode: vim`, with the active mode shown as you type. It lands alongside subagent context controls: `/settings` now lets you opt agents and subagents into context-management tools.
New verbs, cleaner transcripts, safer resumes
The same build adds `copilot instruction list` and `copilot lsp list`, a `--json` flag on plugin listings, and plugin `enable`/`disable` subcommands. A concise transcript folds tool activity into expandable summaries, and automatic compaction is rollback-able via `/session checkpoints`. Large sessions now resume without freezing the UI.
The fixes that bite daily
Session resume no longer silently drops your marketplace plugins and skills after a reload; `/sandbox` now reports your real local-network policy instead of a stale default; and the status line tells you when it's waiting on a background dev server rather than showing a blank "Working."
Elsewhere: Mistral's open models land in Firefox
Mozilla's Smart Window beta — Firefox's in-browser AI assistant — now runs on Mistral models, with zero data retention by default, live in France and North America. For builders it's a signal that open-weight European models are shipping inside a mainstream browser's default AI surface.