diff --git a/.claude-plugin/marketplace.json b/.claude-plugin/marketplace.json
index 94558e8..bf14e15 100644
--- a/.claude-plugin/marketplace.json
+++ b/.claude-plugin/marketplace.json
@@ -5,7 +5,7 @@
   },
   "metadata": {
     "description": "AI-native scientific research pipeline",
-    "version": "0.3.9"
+    "version": "0.4.0"
   },
   "plugins": [
     {
diff --git a/.claude-plugin/plugin.json b/.claude-plugin/plugin.json
index b68a664..83cbd06 100644
--- a/.claude-plugin/plugin.json
+++ b/.claude-plugin/plugin.json
@@ -1,6 +1,6 @@
 {
   "name": "reaper",
-  "version": "0.3.9",
+  "version": "0.4.0",
   "description": "AI-native scientific research pipeline. Takes a research goal — optionally with a research paper — and autonomously conducts rigorous, multi-step academic research.",
   "author": {
     "name": "Runchao Han"
diff --git a/CLAUDE.md b/CLAUDE.md
index e6aec0c..321f711 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -43,7 +43,7 @@ pip install arxiv requests beautifulsoup4
 
 Primary distribution: [`vercel-labs/skills`](https://github.com/vercel-labs/skills) — `npx skills add SebastianElvis/reaper` shallow-clones the repo and copies all skill directories into the host agent's conventional skills folder. Targets 45+ agents including Cursor, OpenAI Codex CLI, Cline, Continue, Gemini CLI, Copilot, Windsurf, OpenCode, Warp, Goose, Replit, and Claude Code.
 
-- Pin syntax: `npx skills add SebastianElvis/reaper#v0.3.9`. Tagged releases are the pin contract.
+- Pin syntax: `npx skills add SebastianElvis/reaper#v0.4.0`. Tagged releases are the pin contract.
 - The installer copies the entire skill directory (including Python scripts and `references/`); only `metadata.json`, `.git`, `__pycache__`, `__pypackages__` are excluded.
 - All `SKILL.md` files must use host-agnostic phrasing ("invoke the `<name>` skill") for inter-skill calls. Sub-skill `Usage` blocks may show host-specific invocation forms (e.g. `/<sub>` on slash-command hosts like Claude Code) as examples, clearly labeled as such.
 
diff --git a/README.md b/README.md
index 5966508..157bb10 100644
--- a/README.md
+++ b/README.md
@@ -96,7 +96,7 @@ Reaper is distributed as standard `SKILL.md` folders. The cross-agent installer
 npx skills add SebastianElvis/reaper
 
 # Pinned to a specific release (recommended for reproducibility)
-npx skills add SebastianElvis/reaper#v0.3.9
+npx skills add SebastianElvis/reaper#v0.4.0
 
 # Install into a specific agent (defaults to all detected)
 npx skills add SebastianElvis/reaper --agent cursor
diff --git a/dev/ROADMAP.md b/dev/ROADMAP.md
index 7d4603c..8b2f832 100644
--- a/dev/ROADMAP.md
+++ b/dev/ROADMAP.md
@@ -419,7 +419,7 @@ Different models have different strengths. The critique skill should route consu
 |-----------|-----------|--------|
 | **Skill format** | `SKILL.md` with `name` + `description` frontmatter (vercel-labs/skills spec) | ✓ |
 | **Cross-agent installer** | `npx skills add SebastianElvis/reaper` | ✓ |
-| **Pin syntax** | `npx skills add SebastianElvis/reaper#v0.3.9` (git tags) | ✓ |
+| **Pin syntax** | `npx skills add SebastianElvis/reaper#v0.4.0` (git tags) | ✓ |
 | **Inter-skill calls** | Host-agnostic prose ("invoke the `<name>` skill") | ✓ |
 | **Python script bundling** | Whole-directory copy includes `arxiv.py`, `iacr.py`, `semantic_scholar.py`, `dblp.py`, `openalex.py`, `references/` | ✓ |
 | **Frontmatter compatibility** | Claude-only keys (`user-invocable`, `argument-hint`, hooks) preserved as opaque YAML, no-op on other hosts | ✓ |