AI digest: 2026-11-03

Highlights

Google's Elephant-Goldfish Model plugin: design-before-code skills where fresh, context-free subagents review your agent's design doc. Install in Claude Code with claude plugin marketplace add google/elephant-goldfish-model, then claude plugin install egm@egm.
Claude message threads (beta): long agent loops send only new messages each turn for a lower time to first token. Prices are unchanged.
Gemini 2.5 Pro and 2.5 Flash deprecated: from 2026-12-01 they route to 3.8 Flash and 3.5 Flash-Lite at the new models' prices, with breaking API changes.

Elephant-Goldfish Model (EGM): Google's plugin for drafting and reviewing designs (Claude Code, Codex, Antigravity).
Claude Code release 2.1.317: fail-closed SDK hooks, account-email leak check, gateway cost report, many fixes.

Claude API message threads (beta): server-side conversation state for long loops; 5-minute expiry, not ZDR-eligible.
Gemini API changelog: Gemini 2.5 Pro and 2.5 Flash deprecated: routing and new-model billing from 2026-12-01.

tooling/skills: EGM plugin and how to install it.
tooling/coding-agents: Claude Code 2.1.317, SDK hooks that fail closed, EGM.
practices/security: email leak check, connector warning, fail-closed SDK hooks.
frameworks/landscape: Claude Agent SDK (Python) row and release check.
models/claude: message threads and how to use them.
models/gemini: 2.5 deprecations; open questions rechecked (Computer Use is billed as regular tokens; 3.5 Flash routing price still unstated).
practices/cost-and-caching: billing for routed deprecations, message threads, gateway cost report, price table notes.