Rename .pi to .feynman, rename citation agent to verifier, add website, skills, and docs

- Rename project config dir from .pi/ to .feynman/ (Pi supports this via piConfig.configDir)
- Rename citation agent to verifier across all prompts, agents, skills, and docs
- Add website with homepage and 24 doc pages (Astro + Tailwind)
- Add skills for all workflows (deep-research, lit, review, audit, replicate, compare, draft, autoresearch, watch, jobs, session-log, agentcomputer)
- Add Pi-native prompt frontmatter (args, section, topLevelCli) and read at runtime
- Remove sync-docs generation layer — docs are standalone
- Remove metadata/prompts.mjs and metadata/packages.mjs — not needed at runtime
- Rewrite README and homepage copy
- Add environment selection to /replicate before executing
- Add prompts/delegate.md and AGENTS.md

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

extensions/research-tools.ts

@@ -6,7 +6,7 @@ import { registerHelpCommand } from "./research-tools/help.js";
 import { registerInitCommand, registerPreviewTool, registerSessionSearchTool } from "./research-tools/project.js";
 
 export default function researchTools(pi: ExtensionAPI): void {
-	const cache: { agentSummaryPromise?: Promise<{ count: number; lines: string[] }> } = {};
+	const cache: { agentSummaryPromise?: Promise<{ agents: string[]; chains: string[] }> } = {};
 
 	pi.on("session_start", async (_event, ctx) => {
 		await installFeynmanHeader(pi, ctx, cache);