commit c8f85a12202673b39469e8cc96cd28cfb7296229
Author: kaitranntt <kaitran.ntt@gmail.com>
Date:   Sat Nov 1 17:01:42 2025 -0400

    feat: initial commit - ultra-simple claude code switcher
    
    - Core ccs bash script with profile switching
    - Installation script with PATH verification
    - Example config template
    - Comprehensive README with troubleshooting
    - Security: input validation, injection prevention
    - MIT license

diff --git a/.ccs.example.json b/.ccs.example.json
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--- /dev/null
+++ b/.ccs.example.json
@@ -0,0 +1,8 @@
+{
+  "profiles": {
+    "glm": "~/.claude/glm.settings.json",
+    "sonnet": "~/.claude/sonnet.settings.json",
+    "opus": "~/.claude/opus.settings.json",
+    "default": "~/.claude/settings.json"
+  }
+}
diff --git a/.gitignore b/.gitignore
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index 00000000..f73c5fc6
--- /dev/null
+++ b/.gitignore
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+# User config files
+.ccs.json
+
+# macOS
+.DS_Store
+
+# Editor
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 CCS Contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/README.md b/README.md
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+++ b/README.md
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+# CCS - Claude Code Switch
+
+Ultra-simple wrapper for `claude --settings`. Switch between Claude profiles with friendly aliases.
+
+## Why?
+
+Claude CLI supports `--settings` flag but it's verbose:
+
+```bash
+claude --settings ~/.claude/glm.settings.json
+claude --settings ~/.claude/sonnet.settings.json --verbose
+```
+
+CCS makes it friendly:
+
+```bash
+ccs glm
+ccs sonnet --verbose
+```
+
+## Installation
+
+```bash
+git clone https://github.com/yourusername/ccs.git
+cd ccs
+./install.sh
+```
+
+Or as a one-liner:
+
+```bash
+git clone https://github.com/yourusername/ccs.git && cd ccs && ./install.sh
+```
+
+## Configuration
+
+Copy example config:
+
+```bash
+cp .ccs.example.json ~/.ccs.json
+```
+
+Edit `~/.ccs.json` with your profiles:
+
+```json
+{
+  "profiles": {
+    "glm": "~/.claude/glm.settings.json",
+    "sonnet": "~/.claude/sonnet.settings.json"
+  }
+}
+```
+
+## Usage
+
+### Basic
+
+```bash
+ccs glm                  # Use GLM profile
+ccs sonnet               # Use Sonnet profile
+```
+
+### Pass Arguments Transparently
+
+All arguments after the profile name are passed directly to Claude:
+
+```bash
+ccs glm --verbose
+ccs sonnet /plan "add feature"
+ccs opus --model claude-opus-4
+```
+
+## Requirements
+
+- `bash` (3.2+ compatible)
+- `jq` (JSON processor)
+- [Claude CLI](https://docs.claude.com/en/docs/claude-code/installation) installed
+
+### Installing jq
+
+```bash
+# macOS
+brew install jq
+
+# Ubuntu/Debian
+sudo apt install jq
+
+# Fedora
+sudo dnf install jq
+```
+
+## How It Works
+
+1. Reads profile name from first argument
+2. Looks up settings file path in `~/.ccs.json`
+3. Executes `claude --settings <path> [remaining-args]`
+
+That's it. No magic, no proxies, no file modification.
+
+## Troubleshooting
+
+### Profile not found
+
+```bash
+Error: Profile 'foo' not found in ~/.ccs.json
+```
+
+**Solution**: Add the profile to your `~/.ccs.json` config file.
+
+### Settings file missing
+
+```bash
+Error: Settings file not found: ~/.claude/foo.settings.json
+```
+
+**Solution**: Create the settings file or update the path in your config.
+
+### jq not installed
+
+```bash
+Error: jq is required but not installed
+```
+
+**Solution**: Install jq using your package manager (see Requirements section).
+
+### PATH not set
+
+```bash
+⚠️  Warning: ~/.local/bin is not in PATH
+```
+
+**Solution**: Add to your shell profile (`~/.bashrc` or `~/.zshrc`):
+
+```bash
+export PATH="$HOME/.local/bin:$PATH"
+```
+
+Then restart your shell or run `source ~/.bashrc` (or `~/.zshrc`).
+
+## Use Cases
+
+### Claude Subscription + GLM Coding Plan
+
+If you have both Claude subscription and GLM coding plan:
+
+```json
+{
+  "profiles": {
+    "claude": "~/.claude/sonnet.settings.json",
+    "glm": "~/.claude/glm.settings.json"
+  }
+}
+```
+
+```bash
+ccs claude           # Use Claude subscription
+ccs glm              # Use GLM coding plan
+```
+
+### Multiple Anthropic Accounts
+
+```json
+{
+  "profiles": {
+    "work": "~/.claude/work.settings.json",
+    "personal": "~/.claude/personal.settings.json"
+  }
+}
+```
+
+### Different Models
+
+```json
+{
+  "profiles": {
+    "sonnet": "~/.claude/sonnet.settings.json",
+    "opus": "~/.claude/opus.settings.json",
+    "haiku": "~/.claude/haiku.settings.json"
+  }
+}
+```
+
+## Uninstallation
+
+```bash
+rm ~/.local/bin/ccs
+rm ~/.ccs.json
+```
+
+## License
+
+MIT
+
+## Contributing
+
+PRs welcome! Keep it simple (KISS principle).
+
+## Philosophy
+
+**YAGNI**: We don't add features "just in case"
+**KISS**: Simple bash script, no complexity
+**DRY**: One source of truth (config file)
+
+This tool does ONE thing well: map profile names to settings files. Nothing more.
diff --git a/ccs b/ccs
new file mode 100755
index 00000000..d2f0e68e
--- /dev/null
+++ b/ccs
@@ -0,0 +1,81 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+CONFIG_FILE="${CCS_CONFIG:-$HOME/.ccs.json}"
+PROFILE="${1:-}"
+
+# Validate usage
+if [[ -z "$PROFILE" ]]; then
+  echo "Usage: ccs <profile> [claude-args...]"
+  echo "Example: ccs glm --verbose"
+  echo ""
+  echo "Available profiles are defined in: $CONFIG_FILE"
+  exit 1
+fi
+
+# Check config exists
+if [[ ! -f "$CONFIG_FILE" ]]; then
+  echo "Error: Config file not found: $CONFIG_FILE"
+  echo ""
+  echo "Create ~/.ccs.json with your profile mappings."
+  echo "See .ccs.example.json for template."
+  exit 1
+fi
+
+# Check jq installed
+if ! command -v jq &> /dev/null; then
+  echo "Error: jq is required but not installed"
+  echo ""
+  echo "Install jq:"
+  echo "  macOS:   brew install jq"
+  echo "  Ubuntu:  sudo apt install jq"
+  echo "  Fedora:  sudo dnf install jq"
+  exit 1
+fi
+
+# Validate profile name (alphanumeric, dash, underscore only)
+if [[ "$PROFILE" =~ [^a-zA-Z0-9_-] ]]; then
+  echo "Error: Invalid profile name. Use only alphanumeric characters, dash, or underscore."
+  exit 1
+fi
+
+# Validate JSON syntax
+if ! jq -e . "$CONFIG_FILE" &>/dev/null; then
+  echo "Error: Invalid JSON in $CONFIG_FILE"
+  exit 1
+fi
+
+# Validate config has profiles object
+if ! jq -e '.profiles' "$CONFIG_FILE" &>/dev/null; then
+  echo "Error: Config must have 'profiles' object"
+  echo "See .ccs.example.json for correct format"
+  exit 1
+fi
+
+# Get settings path for profile (using --arg to prevent injection)
+SETTINGS_PATH=$(jq -r --arg profile "$PROFILE" '.profiles[$profile] // empty' "$CONFIG_FILE")
+
+if [[ -z "$SETTINGS_PATH" ]]; then
+  echo "Error: Profile '$PROFILE' not found in $CONFIG_FILE"
+  echo ""
+  echo "Available profiles:"
+  jq -r '.profiles | keys[]' "$CONFIG_FILE" 2>/dev/null | sed 's/^/  - /'
+  exit 1
+fi
+
+# Expand ~ in path
+SETTINGS_PATH="${SETTINGS_PATH/#\~/$HOME}"
+
+# Validate settings file exists
+if [[ ! -f "$SETTINGS_PATH" ]]; then
+  echo "Error: Settings file not found: $SETTINGS_PATH"
+  echo ""
+  echo "Create the settings file or update the path in $CONFIG_FILE"
+  exit 1
+fi
+
+# Shift profile arg, pass rest to claude
+shift
+
+# Execute claude with settings
+exec claude --settings "$SETTINGS_PATH" "$@"
diff --git a/install.sh b/install.sh
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--- /dev/null
+++ b/install.sh
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+#!/usr/bin/env bash
+set -euo pipefail
+
+INSTALL_DIR="${INSTALL_DIR:-$HOME/.local/bin}"
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+echo "Installing ccs to $INSTALL_DIR..."
+echo ""
+
+# Create install dir if needed
+mkdir -p "$INSTALL_DIR"
+
+# Make executable first
+chmod +x "$SCRIPT_DIR/ccs"
+
+# Symlink ccs script
+ln -sf "$SCRIPT_DIR/ccs" "$INSTALL_DIR/ccs"
+
+# Verify installation
+if [[ ! -L "$INSTALL_DIR/ccs" ]]; then
+  echo "❌ Error: Failed to create symlink at $INSTALL_DIR/ccs"
+  echo "Check directory permissions and try again."
+  exit 1
+fi
+
+# Check if in PATH
+if [[ ":$PATH:" != *":$INSTALL_DIR:"* ]]; then
+  echo "⚠️  Warning: $INSTALL_DIR is not in PATH"
+  echo ""
+  echo "Add to your shell profile (~/.bashrc or ~/.zshrc):"
+  echo "  export PATH=\"\$HOME/.local/bin:\$PATH\""
+  echo ""
+fi
+
+echo "✅ Installation complete!"
+echo ""
+echo "Next steps:"
+echo "1. Copy example config: cp $SCRIPT_DIR/.ccs.example.json ~/.ccs.json"
+echo "2. Edit ~/.ccs.json with your profile mappings"
+echo "3. Run: ccs <profile>"
+echo ""
+echo "Example:"
+echo "  ccs glm"
+echo "  ccs sonnet --verbose"