fix: remove non-functional subagent tracking (#1)

Claude Code doesn't expose subagent counts in its statusline JSON
schema. Subagents are API calls within the same process, not separate
`claude` child processes, so process-table scanning can't detect them.

Removes dead code and references until upstream adds the field.
See: #1

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Demwunz

README.md

@@ -16,7 +16,6 @@ A lightweight statusline for [Claude Code](https://docs.anthropic.com/en/docs/cl
 
 - 📊 **Context breakdown** - Visual bar showing token usage by segment
 - 🚦 **Degradation thresholds** - Color-coded warnings as context fills up
-- ⚡ **Subagent tracking** - See how many background agents are running
 - 💰 **Cost tracking** - Session and daily spending at a glance
 - 🔀 **Git integration** - Branch, staged/unstaged changes, ahead/behind
 - 📁 **Working directory** - Fish-style abbreviated paths
@@ -34,8 +33,8 @@ Built in Rust with zero runtime dependencies. A statusline runs on every prompt,
 ## What It Shows
 
 ```
-[opus] ▓▓▓████████████░░░░░░░░ 42% 116k left ⚡3 │ 1h 30m │ $0.45 / $12.30 │ main ✚2 │ ~/d/myproject
-       ▲ context bar             ▲ remaining   ▲ subagents ▲ elapsed ▲ cost           ▲ git     ▲ path
+[opus] ▓▓▓████████████░░░░░░░░ 42% 116k left │ 1h 30m │ $0.45 / $12.30 │ main ✚2 │ ~/d/myproject
+       ▲ context bar             ▲ remaining   ▲ elapsed ▲ cost           ▲ git     ▲ path
 ```
 
 **Context bar** — two textures show overhead vs conversation at a glance:
@@ -58,7 +57,6 @@ Built in Rust with zero runtime dependencies. A statusline runs on every prompt,
 Remaining tokens shown after percentage (e.g. `178k left`, `1.2m left`).
 
 **Other indicators:**
-- `⚡n` — active subagents (hidden when 0)
 - 🟢 green branch = clean, 🔴 red = dirty, `↑↓` ahead/behind, `✚●?` staged/unstaged/untracked
 - Paths are fish-style abbreviated (`~/d/cc-statusline`)
 

demo.tape

@@ -36,7 +36,7 @@ Type "# 45% — degrading zone (yellow), recall precision drops"
 Enter
 Sleep 500ms
 
-Type@50ms `echo '{"model":{"display_name":"Opus"},"context_window":{"total_input_tokens":60000,"total_output_tokens":20000,"context_window_size":200000,"used_percentage":45,"remaining_percentage":55},"cost":{"total_cost_usd":1.20,"total_duration_ms":900000},"workspace":{"current_dir":"/Users/demo/dev/cc-statusline"},"subagents":{"active":3}}' | cc-statusline`
+Type@50ms `echo '{"model":{"display_name":"Opus"},"context_window":{"total_input_tokens":60000,"total_output_tokens":20000,"context_window_size":200000,"used_percentage":45,"remaining_percentage":55},"cost":{"total_cost_usd":1.20,"total_duration_ms":900000},"workspace":{"current_dir":"/Users/demo/dev/cc-statusline"}}' | cc-statusline`
 Enter
 Sleep 2s
 

src/main.rs

@@ -83,14 +83,6 @@ struct StdinInput {
     workspace: Option<WorkspaceInfo>,
     #[serde(default)]
     session_id: Option<String>,
-    #[serde(default)]
-    subagents: Option<SubagentInfo>,
-}
-
-#[derive(Debug, Deserialize)]
-struct SubagentInfo {
-    #[serde(default)]
-    active: u32,
 }
 
 #[derive(Debug, Deserialize)]
@@ -179,9 +171,6 @@ fn run_statusline(config: &Config) {
 
         let cwd = input.workspace.as_ref().and_then(|w| w.current_dir.clone());
 
-        // Get subagent count
-        let subagent_count = input.subagents.as_ref().map(|s| s.active).unwrap_or(0);
-
         // Get cached scanner results
         let (skills_tokens, plugins_tokens, mcp_tokens) = cache.get();
 
@@ -212,7 +201,6 @@ fn run_statusline(config: &Config) {
             history.daily_cost,
             &git_status,
             cwd.as_deref(),
-            subagent_count,
             config,
         );
 

src/render.rs

@@ -1,4 +1,4 @@
-use crate::colors::{self, BOLD, DIM, RESET, GREEN, RED, YELLOW, CYAN};
+use crate::colors::{self, BOLD, DIM, RESET, GREEN, RED, YELLOW};
 use crate::config::Config;
 use crate::context::ContextBreakdown;
 use crate::git::GitStatus;
@@ -17,7 +17,6 @@ pub fn render(
     daily_cost: f64,
     git: &GitStatus,
     cwd: Option<&str>,
-    subagent_count: u32,
     config: &Config,
 ) -> String {
     let mut output = String::new();
@@ -53,11 +52,6 @@ pub fn render(
         output.push_str(&format!(" {DIM}{} left{RESET}", format_tokens(breakdown.remaining_tokens)));
     }
 
-    // Subagent count (only show when > 0)
-    if subagent_count > 0 {
-        output.push_str(&format!(" {CYAN}⚡{}{RESET}", subagent_count));
-    }
-
     // Session time (elapsed)
     output.push_str(&format!(" {DIM}│{RESET} "));
     output.push_str(&format_duration_ms(duration_ms));
@@ -357,7 +351,4 @@ pub fn print_legend(config: &Config) {
     println!("  {DIM}?n{RESET}      = untracked files");
     println!();
     println!("Path:     current working directory, fish-style (~/d/project)");
-    println!();
-    println!("Subagents:");
-    println!("  {CYAN}⚡n{RESET}     = active subagents (shown only when > 0)");
 }