AI digest: 2026-10-15

Highlights

Claude Code idle compaction: 2.1.299 compacts 200K+ token conversations after about 54 idle minutes, before the one-hour prompt cache expires, to avoid a full uncached re-read. Remote MCP connectors now default to the stateless 2026-07-28 spec.
Gemini 4 Argon is Stable: the Gemini API model page labels it Stable, and the changelog lists it as GA from 2026-10-13. It supports implicit caching only.
Anthropic on the US midterms: its 5.5 models score 99% on political evenhandedness. Red teaming found that campaigns split into harmless-looking subtasks can slip past per-request refusals.

Gemini 4 Argon model page: Stable/GA status, 1M shared context, long decode, implicit caching only (gap fill).

Claude Code releases 2.1.299 and 2.1.300: idle compaction, stricter MCP rules, fail-closed hooks, cache telemetry.

Preparing for the 2026 US midterms: election usage figures, voter-info features, bias evals, banned influence operations.
Anthropic opens Singapore office: MOU with MDDI on joint evaluation; 1,500+ GovTech staff on Claude Code.
On-device scam detection with a fine-tuned Gemma: Google DeepMind and Singapore's two-stage on-device scam detector.

models/gemini: Argon is Stable/GA with its limits and features; open question on its status answered (gap filled).
practices/cost-and-caching: idle compaction tied to cache TTL; Argon has no explicit caching.
tooling/coding-agents: Claude Code 2.1.299–300; GovTech Singapore adoption.
tooling/mcp: stateless protocol now default for Claude Code's remote connectors; open question narrowed.
practices/security: decomposed misuse concept; election misuse findings; sandbox fixes.
models/claude: political evenhandedness results and voting features; Singapore office.
fundamentals/training-and-fine-tuning: cascade pattern with a small on-device fine-tuned model.
models/open-weight: Gemma fine-tuned for on-device scam detection.