feat(mcp): add a one-line Claude Code installer

Ship install-claude-code.sh: a curl|bash installer that provisions the
strix CLI (installing uv first if needed) and registers it as a
user-scoped MCP server in Claude Code, so a Claude Code subscription
drives Strix with no STRIX_LLM or LLM_API_KEY. Fork-only: the script and
the README one-liner pin this fork's URL, so they stay off the upstream
PR branch.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

README.md

@@ -354,7 +354,15 @@ Each server's tools are namespaced by `name`, for example `github_list_issues`.
 
 The reverse of the above: expose Strix's own tools to an MCP client such as Claude Code, Cursor, or Zed. The client supplies the model and the orchestration loop, so this mode needs **no `STRIX_LLM` and no `LLM_API_KEY`** — if you already use Claude Code or another coding agent, Strix rides on that subscription. Strix contributes its sandbox container, the HTTP proxy, the skill packs, and the CVSS-scored reporting tools.
 
-Register it with Claude Code:
+**One-line install for Claude Code** (needs Docker and the `claude` CLI already installed):
+
+```bash
+curl -LsSf https://raw.githubusercontent.com/IshanKulkarni02/strix-ClaudeCode/feat/mcp-server/install-claude-code.sh | bash
+```
+
+That installs the `strix` CLI (installing `uv` first if needed) and registers it as a user-scoped MCP server. Then open Claude Code and ask it to test a target.
+
+To wire it up manually instead, register it with Claude Code:
 
 ```bash
 claude mcp add strix -- strix mcp-server

install-claude-code.sh

@@ -0,0 +1,73 @@
+#!/usr/bin/env bash
+#
+# One-line installer: run Strix as an MCP server inside Claude Code.
+#
+#   curl -LsSf https://raw.githubusercontent.com/IshanKulkarni02/strix-ClaudeCode/feat/mcp-server/install-claude-code.sh | bash
+#
+# It installs the `strix` CLI (via uv, installing uv first if needed) and
+# registers it with Claude Code so the agent can drive Strix's tools. No
+# STRIX_LLM or LLM_API_KEY is needed: Claude Code supplies the model.
+#
+# Requirements the script checks for: Claude Code (`claude`) and Docker.
+
+set -euo pipefail
+
+REPO="${STRIX_REPO:-github.com/IshanKulkarni02/strix-ClaudeCode}"
+BRANCH="${STRIX_BRANCH:-feat/mcp-server}"
+SPEC="git+https://${REPO}@${BRANCH}"
+
+bold() { printf '\033[1m%s\033[0m\n' "$1"; }
+info() { printf '  %s\n' "$1"; }
+warn() { printf '\033[33m!\033[0m %s\n' "$1"; }
+die()  { printf '\033[31m✗\033[0m %s\n' "$1" >&2; exit 1; }
+
+bold "Strix → Claude Code installer"
+
+# 1. Claude Code must be present (it is the model + orchestration loop).
+if ! command -v claude >/dev/null 2>&1; then
+  die "Claude Code not found. Install it first: https://claude.com/claude-code"
+fi
+info "Claude Code: $(command -v claude)"
+
+# 2. uv: install if missing, then make sure its bin dir is on PATH now.
+export PATH="$HOME/.local/bin:$PATH"
+if ! command -v uv >/dev/null 2>&1; then
+  info "Installing uv (Python package manager)…"
+  curl -LsSf https://astral.sh/uv/install.sh | sh
+  # shellcheck disable=SC1090
+  [ -f "$HOME/.local/bin/env" ] && . "$HOME/.local/bin/env"
+fi
+command -v uv >/dev/null 2>&1 || die "uv install failed; see https://docs.astral.sh/uv/"
+info "uv: $(command -v uv)"
+
+# 3. Install the strix CLI from the fork branch as a global tool.
+info "Installing strix from ${REPO}@${BRANCH} (first run downloads deps)…"
+uv tool install --force "$SPEC" >/dev/null
+# Resolve the binary uv just created explicitly — do not trust PATH order, in
+# case an official strix (e.g. ~/.strix/bin/strix) shadows this one.
+UV_BIN_DIR="$(uv tool dir --bin 2>/dev/null || echo "$HOME/.local/bin")"
+STRIX_BIN="$UV_BIN_DIR/strix"
+[ -x "$STRIX_BIN" ] || die "strix was not installed at $STRIX_BIN"
+info "strix: $STRIX_BIN"
+
+# 4. Register the MCP server with Claude Code (user scope = all projects).
+#    Use the absolute path so it resolves regardless of the shell's PATH.
+claude mcp remove strix -s user >/dev/null 2>&1 || true
+claude mcp add strix -s user -- "$STRIX_BIN" mcp-server
+info "Registered 'strix' as an MCP server (user scope)."
+
+# 5. Docker is needed for the sandbox; warn but don't fail if it is down.
+if command -v docker >/dev/null 2>&1; then
+  if docker info >/dev/null 2>&1; then
+    info "Docker: running."
+  else
+    warn "Docker is installed but not running — start it before the first scan."
+  fi
+else
+  warn "Docker not found — install and start Docker Desktop before the first scan."
+fi
+
+printf '\n'
+bold "Done."
+info "Open Claude Code and ask, e.g.:  \"use strix to test https://example.com\""
+info "The sandbox container is pulled automatically on the first tool call."