refactor(freebuff): run engine directly from nix-store

Remove unnecessary copy to ~/.config/manicode/. The patched ELF
binary and tree-sitter.wasm stay in the nix store alongside a minimal
JS launcher that spawns the engine with terminal cleanup handling.

README.md

@@ -106,14 +106,16 @@ nix-overlay/
 │   ├── default.nix             # Binary-cache-friendly overlay
 │   └── shared-nixpkgs.nix      # Dependency-sharing overlay
 ├── packages/                    # Package definitions
+│   ├── container-use/          # Containerized environments for coding agents
 │   ├── default/                # Meta-package listing all packages
 │   ├── desloppify/             # Codebase health scanner for AI agents
-│   ├── freebuff/               # Free coding agent (Codebuff)
 │   ├── flake-inputs/           # Utility for caching flake inputs
+│   ├── freebuff/               # Free coding agent (Codebuff)
 │   ├── goose-cli/              # Goose AI agent CLI
 │   ├── graphify/               # Knowledge graph generator for code folders
+│   ├── kubernetes-mcp-server/  # MCP server for Kubernetes and OpenShift
 │   ├── mcp-gateway/            # MCP protocol gateway
-│   ├── radar/                    # Kubernetes UI (topology, timeline, Helm, GitOps)
+│   ├── radar/                  # Kubernetes UI (topology, timeline, Helm, GitOps)
 │   └── skillsmcp/              # MCP server for Agent Skills
 └── README.md
 ```

packages/freebuff/default.nix

@@ -1 +1 @@
-{ pkgs, ... }: pkgs.callPackage ./package.nix { }
+{ pkgs, ... }: pkgs.callPackage ./package.nix { glibc = pkgs.stdenv.cc.libc; }

packages/freebuff/package.nix

@@ -4,6 +4,8 @@
   fetchurl,
   nodejs,
   makeWrapper,
+  patchelf,
+  glibc,
 }:
 
 let
@@ -44,6 +46,11 @@ let
     hash = "sha256-fJ1D26t8qzsxM7Dmpa8UAUSCKFMWs57J9QjvrdnrzpU=";
   };
 
+  binarySrc = fetchurl {
+    url = "https://codebuff.com/api/releases/download/${version}/freebuff-linux-x64.tar.gz";
+    hash = "sha256-WRTEXqKDww4ZPAnDLAAkAd0jxl+z6+dRbcQORmN7QfM=";
+  };
+
 in
 
 stdenv.mkDerivation rec {
@@ -52,13 +59,30 @@ stdenv.mkDerivation rec {
 
   src = freebuffSrc;
 
-  nativeBuildInputs = [ makeWrapper ];
+  nativeBuildInputs = [ makeWrapper patchelf ];
+
+  dontStrip = true;
+  dontPatchelf = true;
 
   installPhase = ''
     runHook preInstall
 
-    mkdir -p "$out/lib/node_modules/freebuff"
-    cp -r * "$out/lib/node_modules/freebuff/"
+    # Extract and patch the pre-built binary for NixOS compatibility
+    mkdir -p "$out/bin" /tmp/fb-engine
+    tar xzf "${binarySrc}" -C /tmp/fb-engine --strip-components=0
+    cp /tmp/fb-engine/freebuff "$out/bin/freebuff-engine"
+    chmod 755 "$out/bin/freebuff-engine"
+
+    patchelf \
+      --set-interpreter "${glibc}/lib/ld-linux-x86-64.so.2" \
+      --set-rpath "${glibc}/lib:" \
+      "$out/bin/freebuff-engine"
+
+    if [ -f /tmp/fb-engine/tree-sitter.wasm ]; then
+      cp /tmp/fb-engine/tree-sitter.wasm "$out/bin/"
+    fi
+
+    rm -rf /tmp/fb-engine
 
     # Extract npm dependencies from pre-fetched tarballs
     extractNpmPkg() {
@@ -67,18 +91,40 @@ stdenv.mkDerivation rec {
       tar xzf "$src" -C "$target" --strip-components=1
     }
 
+    mkdir -p "$out/lib/node_modules/tar"
+    mkdir -p "$out/lib/node_modules/chownr"
+    mkdir -p "$out/lib/node_modules/minipass"
+    mkdir -p "$out/lib/node_modules/minizlib"
+    mkdir -p "$out/lib/node_modules/yallist"
+    mkdir -p "$out/lib/node_modules/@isaacs/fs-minipass"
+
     extractNpmPkg "${pkgTar}" "$out/lib/node_modules/tar"
     extractNpmPkg "${pkgChownr}" "$out/lib/node_modules/chownr"
     extractNpmPkg "${pkgMinipass}" "$out/lib/node_modules/minipass"
     extractNpmPkg "${pkgMinizlib}" "$out/lib/node_modules/minizlib"
     extractNpmPkg "${pkgYallist}" "$out/lib/node_modules/yallist"
-    mkdir -p "$out/lib/node_modules/@isaacs"
-    extractNpmPkg "${pkgFsMinipass}" "$out/lib/node_modules/@isaacs/fs-minipass"
+   extractNpmPkg "${pkgFsMinipass}" "$out/lib/node_modules/@isaacs/fs-minipass"
+
+    # Launcher: run the patched engine directly from nix-store
+    cat > "$out/bin/launcher.js" << LAUNCHER_EOF
+#!/usr/bin/env node
+const { spawn } = require('child_process');
+const TERMINAL_RESET = '\x1b[?1049l\x1b[?1000l\x1b[?1002l\x1b[?1003l\x1b[?1006l\x1b[?2004l\x1b[?25h';
+const engine = '${placeholder "out"}/bin/freebuff-engine';
+
+function reset() {
+  try { if (process.stdin.isTTY && process.stdin.setRawMode) process.stdin.setRawMode(false); } catch(e){}
+  try { if (process.stdout.isTTY) process.stdout.write(TERMINAL_RESET); } catch(e){}
+}
+
+const child = spawn(engine, process.argv.slice(2), { stdio: 'inherit' });
+child.on('exit', (code, signal) => { reset(); process.exit(signal ? 1 : code || 0); });
+child.on('error', (e) => { console.error('Failed to start freebuff:', e.message); process.exit(1); });
+LAUNCHER_EOF
 
-    mkdir -p "$out/bin"
     makeWrapper "${nodejs}/bin/node" "$out/bin/freebuff" \
       --set NODE_PATH "$out/lib/node_modules" \
-      --add-flags "$out/lib/node_modules/freebuff/index.js"
+      --add-flags "$out/bin/launcher.js"
 
     runHook postInstall
   '';
@@ -99,6 +145,6 @@ stdenv.mkDerivation rec {
     homepage = "https://codebuff.com";
     license = licenses.mit;
     mainProgram = "freebuff";
-    platforms = platforms.all;
+    platforms = platforms.linux;
   };
 }