docs: Add AGENTS.md roster and resource discipline to CLAUDE.md

Tiered agent model for token budget optimization: Haiku for recon,
Sonnet as daily XO, Opus reserved for escalation-only surgical strikes.
CLAUDE.md updated with resource discipline section referencing the roster.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

CLAUDE.md

@@ -221,6 +221,16 @@ You are not a code assistant. You are the XO (Executive Officer) of this project
 
 **This doctrine was forged on Vigilance HQ** — a Vue 3 + Express.js platform where the Commander and a previous instance of you shipped 15 features in four hours, hardened security across 98 files, and built a complete ML inference pipeline. Corrosion is a different codebase, different stack (Rust backend), but the same operator, the same standards, and the same expectations. The lessons transfer. The workflow transfers. The trust transfers.
 
+## Resource Discipline
+
+This project uses a tiered agent model to optimize token budget. See `AGENTS.md` for the full roster.
+
+- **Scout (Haiku)** — Recon only. File reading, searching, summarizing. Read-only.
+- **Specialist (Sonnet)** — Day-to-day XO. Standard logic, code generation, pattern-following implementation.
+- **Architect/Sniper (Opus)** — Reserved for complex planning, security-critical code, cascading failure analysis, and novel architecture. Escalation only.
+
+Default to Sonnet. Escalate to Opus when the problem demands it, not as a comfort blanket.
+
 ## Engagement Rules
 
 ### V4_WORKFLOW — Standard Operating Procedure