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>

website/src/content/docs/tools/alphaxiv.md

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+---
+title: AlphaXiv
+description: Paper search and analysis tools
+section: Tools
+order: 1
+---
+
+## Overview
+
+AlphaXiv powers Feynman's academic paper workflows. All tools require an alphaXiv account — sign in with `feynman alpha login`.
+
+## Tools
+
+### alpha_search
+
+Paper discovery with three search modes:
+
+- **semantic** — Meaning-based search across paper content
+- **keyword** — Traditional keyword matching
+- **agentic** — AI-powered search that interprets your intent
+
+### alpha_get_paper
+
+Fetch a paper's report (structured summary) or full raw text by arXiv ID.
+
+### alpha_ask_paper
+
+Ask a targeted question about a specific paper. Returns an answer grounded in the paper's content.
+
+### alpha_annotate_paper
+
+Add persistent local notes to a paper. Annotations are stored locally and persist across sessions.
+
+### alpha_list_annotations
+
+Recall all annotations across papers and sessions.
+
+### alpha_read_code
+
+Read source code from a paper's linked GitHub repository. Useful for auditing or replication planning.

website/src/content/docs/tools/preview.md

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+---
+title: Preview
+description: Preview generated artifacts in browser or PDF
+section: Tools
+order: 4
+---
+
+## Overview
+
+The `preview_file` tool opens generated artifacts in your browser or PDF viewer.
+
+## Usage
+
+Inside the REPL:
+
+```
+/preview
+```
+
+Or Feynman will suggest previewing when you generate artifacts that benefit from rendered output (Markdown with LaTeX, HTML reports, etc.).
+
+## Requirements
+
+Preview requires `pandoc` for PDF/HTML rendering. Install it with:
+
+```bash
+feynman --setup-preview
+```
+
+## Supported formats
+
+- Markdown (with LaTeX math rendering)
+- HTML
+- PDF

website/src/content/docs/tools/session-search.md

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+---
+title: Session Search
+description: Search prior Feynman session transcripts
+section: Tools
+order: 3
+---
+
+## Overview
+
+The `session_search` tool recovers prior Feynman work from stored session transcripts. Useful for picking up previous research threads or finding past findings.
+
+## Usage
+
+Inside the REPL:
+
+```
+/search
+```
+
+Or use the tool directly — Feynman will invoke `session_search` automatically when you reference prior work.
+
+## What it searches
+
+- Full session transcripts
+- Tool outputs and agent results
+- Generated artifacts and their content

website/src/content/docs/tools/web-search.md

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+---
+title: Web Search
+description: Web search routing and configuration
+section: Tools
+order: 2
+---
+
+## Routing modes
+
+Feynman supports three web search backends:
+
+| Mode | Description |
+|------|-------------|
+| `auto` | Prefer Perplexity when configured, fall back to Gemini |
+| `perplexity` | Force Perplexity Sonar |
+| `gemini` | Force Gemini (default) |
+
+## Default behavior
+
+The default path is zero-config Gemini Browser via a signed-in Chromium profile. No API keys required.
+
+## Check current config
+
+```bash
+feynman search status
+```
+
+## Advanced configuration
+
+Edit `~/.feynman/web-search.json` directly to set:
+
+- Gemini API keys
+- Perplexity API keys
+- Custom routing preferences