GitHub CLI's Linux signing key expired Sept 5 — apt and dnf break
Only pre-April Linux installs break; Homebrew and macOS are fine. Also: Copilot retires four models Oct 2, and a free MIT medical model hits Vercel.
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Pre-April Linux installs break on next update
The PGP key signing GitHub CLI's APT and RPM repos expired Saturday, Sept 5. If you installed gh from the official Linux repos before April 8, 2026 and haven't refreshed since, the next gh release makes `apt update` and `dnf` fail signature checks (NO_PUBKEY / verification errors). Fix: re-install GitHub's keyring, which has shipped both the old and replacement keys since April.
Who's safe — Homebrew, macOS, Windows, source
Untouched: Windows, macOS, Homebrew, Conda, source builds, and anyone grabbing the .deb or standalone binary directly. Also fine: Linux users who installed or updated gh after April 8, 2026 — that keyring already trusts the replacement key, so nothing to do.
Copilot retires four models Oct 2
GitHub is pulling Gemini 3.5 Flash, Gemini 3.6 Flash, Kimi K2.7 Code, and Claude Opus 4.7 from every Copilot surface — chat, inline edits, ask/agent modes, and completions — on Oct 2. Migrate pinned configs to Gemini 3.8 Flash, Kimi K3, and Claude Opus 5 before then, or requests silently fall back.
A free MIT model to prototype with this weekend
Ling 3.0 Flash Sante (inclusionAI / Ant Group), a medical-tuned MoE — 124B total, ~5.1B active, 262K context, MIT weights — is free on Vercel's AI Gateway through Oct 4: one API key, no provider account. Cheap ground for a domain-RAG or triage-assistant prototype before you commit to a paid tier.