Rescope pdf-research → pdf: expose annotation, form-filling, signing

The underlying @modelcontextprotocol/server-pdf gained an `interact`
tool with 10 annotation types (highlight, underline, strikethrough,
note, rectangle, circle, line, freetext, stamp, image), form filling,
auto-highlight-text, page extraction, and annotated-PDF download.

This reshapes the plugin around interactive workflows:

- Rename plugin: pdf-research → pdf
- Rename skill: pdf-reading → pdf (unified, covers all capabilities)
- Commands: drop /summarize, rename /read → /open, add /annotate,
  /fill-form, /sign
- SKILL.md: document interact tool, all annotation types, coordinate
  system, interactive workflows (AI-driven annotate, form filling,
  visual signing)
- Positioning: explicitly steer AWAY from viewer for pure ingestion
  (use native Read instead) — the viewer's value is user interactivity
- /sign disclaimer: visual signature image, not certified digital sig

Out of scope (documented): summarization, cert signing, PDF generation.

Author: ochafik

.claude-plugin/marketplace.json

@@ -60,9 +60,9 @@
       "description": "Connect to preclinical research tools and databases (literature search, genomics analysis, target prioritization) to accelerate early-stage life sciences R&D"
     },
     {
-      "name": "pdf-research",
-      "source": "./pdf-research",
-      "description": "Read, navigate, and analyze PDF documents — academic papers, reports, and local files. Uses a local PDF MCP server for interactive viewing and text extraction."
+      "name": "pdf",
+      "source": "./pdf",
+      "description": "Interactive PDF workflows — view, annotate, fill forms, and sign documents in a live viewer. Collaborate on markup, stamp approvals, and place signatures with real-time visual feedback."
     }
   ]
 }

pdf-research/.claude-plugin/plugin.json

@@ -0,0 +1,8 @@
+{
+  "name": "pdf",
+  "version": "0.2.0",
+  "description": "Interactive PDF workflows — view, annotate, fill forms, and sign documents in a live viewer. Collaborate on markup, stamp approvals, and place signatures with real-time visual feedback.",
+  "author": {
+    "name": "Anthropic"
+  }
+}

pdf-research/README.md

@@ -7,7 +7,7 @@ The PDF server runs on your machine via `npx`.
 
 | Category | Server | How it runs |
 |----------|--------|-------------|
-| PDF viewer | `@modelcontextprotocol/server-pdf` | Local stdio via `npx` (auto-installed) |
+| PDF viewer & annotator | `@modelcontextprotocol/server-pdf` | Local stdio via `npx` (auto-installed) |
 
 ### Requirements
 - Node.js >= 18