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GitHub Actions is starting runtime brownouts for outdated self-hosted runners

Teams with pinned, custom-image or auto-update-disabled GitHub Actions runners can now see registration or job execution fail before the September 25 cutoff. The migration is not just a one-time jump to v2.329.0: already-registered runners must also stay within 30 days of the latest runner release.

Bun 1.4 rewrites the runtime in Rust and moves closer to Node.js 26 compatibility

Bun 1.4 combines an implementation-language rewrite with a larger built-in standard library and a substantial Node-compatibility push. For teams already running Bun, the practical task is to validate native addons, runtime behavior and workload-specific performance rather than treating this as a drop-in minor upgrade.

OpenAI’s Assistants API has shut down

The Assistants API shutdown date has passed. OpenAI’s deprecation documentation lists August 26, 2026 as the removal date and directs developers to Responses and Conversations for replacement workloads.

OpenSSH 10.6 turns on hybrid post-quantum signatures and disables compression to cut side-channel risk

The release is more than routine maintenance. OpenSSH is changing cryptographic defaults, sacrificing some compression effectiveness for side-channel safety, and warning that AI-assisted security reports are pushing it toward a faster release cadence.

Google Cloud extends Agent Identity into Cloud Run with automatic Agent Registry registration

Agent Identity is moving from a standalone credential boundary into a mainstream serverless runtime. Cloud Run can now assign agent identities and register agents/MCP servers automatically, reducing custom discovery and identity plumbing while keeping the runtime integration itself in Preview.

Meta Muse turns a consumer AI assistant into a persistent agent — and its first Mac zero-day tests the containment model

Muse packages persistent autonomous execution, credentials, payments, app access and memory into a mainstream consumer product. A September macOS hotfix now provides an early real-world lesson: agent containment has to protect not only the cloud runtime but also the local control path into the agent.