• ai-seo (2.3.0 → 2.4.0): new references/agent-readiness.md — the access/discovery/parseability layer beneath all content work: can an agent reach, navigate, and parse the site at all. Anchored on the two free scoring tools that shipped in Aug 2026 and made this measurable — Is Agentic (Vercel + Ora; npx is-agentic; 100+ checks with essential/recommended/bonus tiers, not-applicable excluded rather than failed, plus an observed agent journey) and Frase's Agent Readiness Checker (access/discovery/parseability triad with 80/60 score bands) — both credited, with the checks treated as the value rather than the vendor pitch. Covers the access essentials (core content in initial HTML — most agents never run JavaScript; no bot-challenge/firewall blocks on AI crawlers; correct HTTP behavior), the discovery file stack (robots.txt with an explicit AI-crawler stance, clean sitemap, llms.txt plus the newer llms-full.txt whole-site-in-one-request companion, robots content-usage statements), and the newest parseability technique: a Markdown representation of every page, served either by content negotiation (Accept: text/markdown at the same canonical URL with a Vary header) or an HTTP Link header pointing at a parallel Markdown version. Introduces the agent-actionable frontier (WebMCP — pages declaring forms/CTAs as callable tools; labeled emerging) with the practical-today floor (highest-intent actions work without JS-only flows). Adds a citation-source volatility section built on the Aug 2026 case study — ChatGPT's query fan-out changes nearly wiped Reddit as a citation source within days (practitioner-reported, Ashni of Hype Partners (@ashnichrist) and others), while business-owned sites dominate Gemini citations (~60%) — with the strategy consequences: portfolio over single-surface concentration, owned-site fundamentals as the volatility hedge, citation-share stats treated as dated snapshots verified against your own monitoring, and ~24-hour citation speed as the freshness upside. SKILL.md updates the Reddit lines in the Presence pillar with the volatility flag, points Machine-Readable Files at the new reference, and adds 'agent readiness' / 'is my site agent-ready' / 'llms-full.txt' / 'WebMCP' triggers. New eval (id 9) covers the two-sided prompt: an agent-readiness audit plus a Reddit-concentrated strategy that must get the volatility warning.