feat(plugin): publish as Claude Code marketplace plugin

Update .claude-plugin/marketplace.json and plugin.json to v2.9.5 with
full metadata. Add plugin install instructions to README as the
recommended install method. The repo root serves as both the marketplace
and the plugin - skills/last30days/SKILL.md (symlink) is discovered
automatically.

Users can now install with:
  /plugin marketplace add mvanhorn/last30days-skill
  /plugin install last30days@last30days-skill

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

.claude-plugin/marketplace.json

@@ -1,18 +1,23 @@
 {
   "$schema": "https://anthropic.com/claude-code/marketplace.schema.json",
-  "name": "last30days",
+  "name": "last30days-skill",
+  "description": "Research any topic from the last 30 days across Reddit, X, YouTube, TikTok, Instagram, Hacker News, Polymarket, and the web.",
   "owner": {
-    "name": "mvanhorn",
+    "name": "Matt Van Horn",
     "url": "https://github.com/mvanhorn"
   },
-  "metadata": {
-    "description": "Research any topic from the last 30 days across Reddit, X, YouTube, and the web",
-    "version": "2.1.0"
-  },
   "plugins": [
     {
       "name": "last30days",
-      "source": "./"
+      "description": "Research any topic from the last 30 days. Become an expert and write copy-paste-ready prompts.",
+      "version": "2.9.5",
+      "author": {
+        "name": "Matt Van Horn",
+        "url": "https://github.com/mvanhorn"
+      },
+      "source": "./",
+      "category": "productivity",
+      "homepage": "https://github.com/mvanhorn/last30days-skill"
     }
   ]
 }

.claude-plugin/plugin.json

@@ -1,12 +1,25 @@
 {
   "name": "last30days",
-  "description": "Research any topic from the last 30 days across Reddit, X, YouTube, and the web",
+  "version": "2.9.5",
-  "version": "2.9.1",
+  "description": "Research any topic from the last 30 days across Reddit, X, YouTube, TikTok, Instagram, Hacker News, Polymarket, and the web.",
   "author": {
-    "name": "mvanhorn"
+    "name": "Matt Van Horn",
+    "email": "mvanhorn@gmail.com",
+    "url": "https://github.com/mvanhorn"
   },
+  "homepage": "https://github.com/mvanhorn/last30days-skill",
   "repository": "https://github.com/mvanhorn/last30days-skill",
   "license": "MIT",
-  "keywords": ["research", "reddit", "twitter", "x", "youtube", "trends", "prompts"],
+  "keywords": [
+    "research",
+    "reddit",
+    "twitter",
+    "youtube",
+    "tiktok",
+    "instagram",
+    "trends",
+    "prompts",
+    "polymarket"
+  ],
   "skills": ["./"]
 }

README.md

@@ -36,12 +36,18 @@ Instagram Reels is now the 8th signal source. TikTok and Instagram both run on S
 
 ## Installation
 
+### Claude Code Plugin (recommended)
+```
+/plugin marketplace add mvanhorn/last30days-skill
+/plugin install last30days@last30days-skill
+```
+
 ### Gemini CLI
 ```bash
 gemini extensions install https://github.com/mvanhorn/last30days-skill.git
 ```
 
-### Claude Code / Codex
+### Manual Install (Claude Code / Codex)
 ```bash
 # Clone the repo
 git clone https://github.com/mvanhorn/last30days-skill.git ~/.claude/skills/last30days

docs/plans/2026-03-08-feat-claude-code-plugin-marketplace-plan.md

@@ -0,0 +1,197 @@
+---
+title: "feat: Publish last30days as Claude Code marketplace plugin"
+type: feat
+status: active
+date: 2026-03-08
+---
+
+# feat: Publish last30days as Claude Code Marketplace Plugin
+
+## Overview
+
+Publish the last30days skill as a Claude Code plugin so users can install it with:
+
+```
+/plugin marketplace add mvanhorn/last30days-skill
+/plugin install last30days@last30days-skill
+```
+
+This gives users auto-updates, versioned installs, and the standard plugin management UX instead of manual git clone.
+
+## Current State
+
+The repo already has most of what's needed:
+
+| Component | Status | Notes |
+|-----------|--------|-------|
+| `SKILL.md` | Exists | Source of truth at repo root |
+| `skills/last30days/SKILL.md` | Exists (symlink) | Points to root SKILL.md, added for Gemini CLI |
+| `scripts/` | Exists | Python research engine |
+| `gemini-extension.json` | Exists | Gemini CLI support |
+| `.claude-plugin/marketplace.json` | **Missing** | Needed to make repo a marketplace |
+| `.claude-plugin/plugin.json` | **Missing** | Needed (in plugin subdir) to define the plugin |
+| `plugins/last30days/` | **Missing** | Plugin directory structure |
+
+## How It Works (compound-engineering as reference)
+
+The repo serves as BOTH a **marketplace** (distribution channel) and contains **plugins**:
+
+```
+repo-root/                          # = marketplace
+├── .claude-plugin/
+│   └── marketplace.json            # Makes repo discoverable as marketplace
+└── plugins/
+    └── plugin-name/                # = individual plugin
+        ├── .claude-plugin/
+        │   └── plugin.json         # Plugin manifest
+        └── skills/
+            └── skill-name/
+                └── SKILL.md
+```
+
+## Implementation Plan
+
+### 1. Create marketplace manifest
+
+#### `.claude-plugin/marketplace.json`
+
+```json
+{
+  "$schema": "https://anthropic.com/claude-code/marketplace.schema.json",
+  "name": "last30days-skill",
+  "description": "Research any topic from the last 30 days across Reddit, X, YouTube, TikTok, Instagram, Hacker News, Polymarket, and the web.",
+  "owner": {
+    "name": "Matt Van Horn",
+    "url": "https://github.com/mvanhorn"
+  },
+  "plugins": [
+    {
+      "name": "last30days",
+      "description": "Research any topic from the last 30 days. Become an expert and write copy-paste-ready prompts.",
+      "version": "2.9.5",
+      "author": {
+        "name": "Matt Van Horn",
+        "url": "https://github.com/mvanhorn"
+      },
+      "source": "./plugins/last30days",
+      "category": "productivity",
+      "homepage": "https://github.com/mvanhorn/last30days-skill"
+    }
+  ]
+}
+```
+
+### 2. Create plugin directory
+
+#### `plugins/last30days/.claude-plugin/plugin.json`
+
+```json
+{
+  "name": "last30days",
+  "version": "2.9.5",
+  "description": "Research any topic from the last 30 days across Reddit, X, YouTube, TikTok, Instagram, Hacker News, Polymarket, and the web.",
+  "author": {
+    "name": "Matt Van Horn",
+    "email": "mvanhorn@gmail.com",
+    "url": "https://github.com/mvanhorn"
+  },
+  "homepage": "https://github.com/mvanhorn/last30days-skill",
+  "repository": "https://github.com/mvanhorn/last30days-skill",
+  "license": "MIT",
+  "keywords": [
+    "research",
+    "reddit",
+    "twitter",
+    "youtube",
+    "tiktok",
+    "trends",
+    "prompts"
+  ]
+}
+```
+
+### 3. Symlink skill and scripts into plugin directory
+
+```bash
+mkdir -p plugins/last30days/.claude-plugin
+mkdir -p plugins/last30days/skills/last30days
+
+# Symlink SKILL.md (single source of truth)
+ln -s ../../../../SKILL.md plugins/last30days/skills/last30days/SKILL.md
+
+# Symlink scripts directory (the Python engine)
+ln -s ../../scripts plugins/last30days/scripts
+
+# Symlink fixtures if needed
+ln -s ../../fixtures plugins/last30days/fixtures
+```
+
+### 4. Update README with plugin install instructions
+
+Add before the manual install section:
+
+```markdown
+### Plugin Install (recommended)
+```
+/plugin marketplace add mvanhorn/last30days-skill
+/plugin install last30days@last30days-skill
+```
+
+Then configure your API keys:
+```bash
+mkdir -p ~/.config/last30days
+# Add SCRAPECREATORS_API_KEY to your env
+```
+```
+
+### 5. Version bump workflow
+
+When releasing new versions, update version in ALL manifests:
+- `SKILL.md` frontmatter `version:`
+- `gemini-extension.json` `version`
+- `plugins/last30days/.claude-plugin/plugin.json` `version`
+- `.claude-plugin/marketplace.json` plugins[0].version
+
+Consider: a `scripts/bump-version.sh` that updates all four in one command.
+
+## Open Question: Symlinks in Plugin Cache
+
+**Risk:** When Claude Code installs a plugin, it clones the repo into `~/.claude/plugins/cache/`. Git preserves symlinks on macOS/Linux, so `plugins/last30days/skills/last30days/SKILL.md -> ../../../../SKILL.md` should resolve correctly because the full repo is cloned.
+
+**Mitigation if symlinks fail:** Replace symlinks with a small build step in sync.sh that copies SKILL.md into the plugin directory. Or just copy the file and accept the duplication in the plugin directory (since the plugin cache is a read-only clone anyway - drift only matters in the source repo, not the installed copy).
+
+**Test:** After implementing, verify with `git clone` into a temp dir and check symlink resolution.
+
+## Acceptance Criteria
+
+- [ ] `.claude-plugin/marketplace.json` exists with correct schema
+- [ ] `plugins/last30days/.claude-plugin/plugin.json` exists
+- [ ] `plugins/last30days/skills/last30days/SKILL.md` resolves to root SKILL.md
+- [ ] `plugins/last30days/scripts` resolves to root scripts/
+- [ ] README has plugin install instructions
+- [ ] `/plugin marketplace add mvanhorn/last30days-skill` works
+- [ ] `/plugin install last30days@last30days-skill` works
+- [ ] `/last30days test topic` works after plugin install
+- [ ] Standalone install (git clone to ~/.claude/skills/) still works
+- [ ] Gemini CLI install still works
+
+## User Experience After Publishing
+
+```
+# One-time setup
+/plugin marketplace add mvanhorn/last30days-skill
+/plugin install last30days@last30days-skill
+
+# Use it
+/last30days AI video tools for business
+
+# Auto-updates happen at startup when version bumps
+```
+
+## Sources
+
+- Claude Code plugin docs: https://code.claude.com/docs/en/plugins
+- Plugin reference: https://code.claude.com/docs/en/plugins-reference
+- Marketplace docs: https://code.claude.com/docs/en/plugin-marketplaces
+- compound-engineering reference: https://github.com/EveryInc/compound-engineering-plugin
+- Your installed plugins: superpowers (4.3.1), swift-lsp (1.0.0), compound-engineering (2.38.1)

docs/plans/2026-03-08-feat-gemini-cli-support-implementation-plan.md

@@ -1,7 +1,7 @@
 ---
 title: "feat: Add Gemini CLI extension support"
 type: feat
-status: active
+status: completed
 date: 2026-03-08
 origin: docs/plans/2026-03-08-review-pr-53-gemini-cli-support-plan.md
 ---