fix: add --dangerously-skip-permissions flag for Claude Code backend

When using Claude Code CLI in non-interactive mode (--print), write/edit
operations require permission bypass. Without this flag, Claude Code
would prompt for permissions which cannot be handled in subprocess mode.

Added skip_permissions parameter (default: True) to ClaudeCodeBackend
that adds --dangerously-skip-permissions to CLI commands.

Bump version to 4.0.1

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: Taoidle

.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "plan-cascade",
-  "version": "4.0.0",
+  "version": "4.0.1",
   "description": "Three-layer cascaded parallel development framework with multi-agent collaboration. Breaks down projects into Features (Mega Plan), Features into Stories (Hybrid Ralph), with dependency-driven batch execution, Git Worktree isolation, and support for multiple AI agents (Codex, Amp, Aider, etc.).",
   "author": {
     "name": "Taoidle",

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "plan-cascade"
-version = "4.0.0"
+version = "4.0.1"
 description = "Plan Cascade - Three-layer parallel development framework for AI coding tools"
 readme = "README.md"
 license = {text = "MIT"}

src/plan_cascade/backends/claude_code.py

@@ -50,6 +50,7 @@ def __init__(
         claude_path: str = "claude",
         project_root: Path | None = None,
         output_format: str = "stream-json",
+        skip_permissions: bool = True,
     ):
         """
         Initialize the Claude Code backend.
@@ -58,11 +59,15 @@ def __init__(
             claude_path: Path to claude CLI (default: "claude")
             project_root: Project root directory
             output_format: Output format ("stream-json" recommended)
+            skip_permissions: Whether to skip permission checks (default: True)
+                             This allows Claude Code to write/edit files without
+                             interactive permission prompts.
         """
         super().__init__(project_root)
 
         self.claude_path = claude_path
         self.output_format = output_format
+        self.skip_permissions = skip_permissions
 
         self._process: asyncio.subprocess.Process | None = None
         self._llm: LLMProvider | None = None
@@ -124,6 +129,10 @@ async def execute(
             "--include-partial-messages",  # Enable true streaming output
         ]
 
+        # Add permission bypass if enabled (required for non-interactive write/edit)
+        if self.skip_permissions:
+            cmd.append("--dangerously-skip-permissions")
+
         # Add session resume if we have a session_id
         if self._session_id:
             cmd.extend(["--resume", self._session_id])
@@ -464,9 +473,14 @@ async def complete(
             "--output-format", "stream-json",
             "--verbose",
             "--include-partial-messages",  # Enable true streaming
-            prompt,
         ]
 
+        # Add permission bypass if enabled
+        if self.backend.skip_permissions:
+            cmd.append("--dangerously-skip-permissions")
+
+        cmd.append(prompt)
+
         output_text = ""
 
         try: