Add Windows support for context-bar.sh (fixes #5)

scripts/README.md

@@ -51,6 +51,22 @@ Preview all options by running `bash scripts/color-preview.sh`:
 - `git` (optional, for branch display)
 - Claude Code 2.0.65+ (verified to work; older versions may not have the required JSON fields - check earlier commits for older versions)
 
+### Windows Support
+
+On Windows (Git Bash/MSYS2), the script automatically uses `jq.exe` from the same directory. To set up:
+
+1. Download `jq.exe` from [jqlang.github.io/jq](https://jqlang.github.io/jq/download/) or [GitHub releases](https://github.com/jqlang/jq/releases)
+2. Place `jq.exe` in `~/.claude/scripts/` alongside `context-bar.sh`
+3. Use Windows-style path in `settings.json`:
+   ```json
+   {
+     "statusLine": {
+       "type": "command",
+       "command": "C:/Users/USERNAME/.claude/scripts/context-bar.sh"
+     }
+   }
+   ```
+
 ### How it works
 
 Claude Code passes session metadata to status line commands via stdin as JSON, including:

scripts/context-bar.sh

@@ -1,5 +1,17 @@
 #!/bin/bash
 
+# Cross-platform jq detection (Windows compatibility)
+# On Windows (Git Bash/MSYS), use jq.exe from the same directory
+# On Linux/Mac, use system jq
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+if [[ "$OSTYPE" == "msys" || "$OSTYPE" == "cygwin" || -n "$MSYSTEM" ]]; then
+    # Windows (Git Bash/MSYS2)
+    JQ="${SCRIPT_DIR}/jq.exe"
+else
+    # Linux/Mac - use system jq
+    JQ="jq"
+fi
+
 # Color theme: gray, orange, blue, teal, green, lavender, rose, gold, slate, cyan
 # Preview colors with: bash scripts/color-preview.sh
 COLOR="blue"
@@ -24,8 +36,8 @@ esac
 input=$(cat)
 
 # Extract model, directory, and cwd
-model=$(echo "$input" | jq -r '.model.display_name // .model.id // "?"')
-cwd=$(echo "$input" | jq -r '.cwd // empty')
+model=$(echo "$input" | "$JQ" -r '.model.display_name // .model.id // "?"')
+cwd=$(echo "$input" | "$JQ" -r '.cwd // empty')
 dir=$(basename "$cwd" 2>/dev/null || echo "?")
 
 # Get git branch, uncommitted file count, and sync status
@@ -95,17 +107,17 @@ if [[ -n "$cwd" && -d "$cwd" ]]; then
 fi
 
 # Get transcript path for context calculation and last message feature
-transcript_path=$(echo "$input" | jq -r '.transcript_path // empty')
+transcript_path=$(echo "$input" | "$JQ" -r '.transcript_path // empty')
 
 # Get context window size from JSON (accurate), but calculate tokens from transcript
 # (more accurate than total_input_tokens which excludes system prompt/tools/memory)
 # See: github.com/anthropics/claude-code/issues/13652
-max_context=$(echo "$input" | jq -r '.context_window.context_window_size // 200000')
+max_context=$(echo "$input" | "$JQ" -r '.context_window.context_window_size // 200000')
 max_k=$((max_context / 1000))
 
 # Calculate context bar from transcript
 if [[ -n "$transcript_path" && -f "$transcript_path" ]]; then
-    context_length=$(jq -s '
+    context_length=$("$JQ" -s '
         map(select(.message.usage and .isSidechain != true and .isApiErrorMessage != true)) |
         last |
         if . then
@@ -182,7 +194,7 @@ if [[ -n "$transcript_path" && -f "$transcript_path" ]]; then
     [[ -n "$branch" ]] && plain_output+=" | 🔀${branch} ${git_status}"
     plain_output+=" | xxxxxxxxxx ${pct}% of ${max_k}k tokens"
     max_len=${#plain_output}
-    last_user_msg=$(jq -rs '
+    last_user_msg=$("$JQ" -rs '
         # Messages to skip (not useful as context)
         def is_unhelpful:
             startswith("[Request interrupted") or