Oh My Posh for GitHub Copilot CLI statusline - Catppuccin theme

statusline.cmd

@echo off
rem Keep the wrapper tiny so Copilot can pass stdin straight through to PowerShell.
pwsh -NoProfile -ExecutionPolicy Bypass -File "%~dp0statusline.ps1"

statusline.omp.json

{
  "$schema": "https://raw.githubusercontent.com/JanDeDobbeleer/oh-my-posh/main/themes/schema.json",
  "version": 4,
  "final_space": false,
  "palette": {
    "text": "#494D64",
    "blue": "#8AADF4",
    "lavender": "#B7BDF8",
    "pink": "#F5BDE6",
    "green": "#A6DA95",
    "surface": "#6E738D",
    "white": "#FFFFFF"
  },
  "blocks": [
    {
      "type": "prompt",
      "alignment": "left",
      "segments": [
        {
          "type": "text",
          "style": "diamond",
          "leading_diamond": "\ue0b6",
          "foreground": "p:text",
          "background": "p:pink",
          "template": " \uf07b {{ .Env.COPILOT_STATUS_FOLDER }}{{ if .Env.COPILOT_STATUS_BRANCH }} | \ue725 {{ .Env.COPILOT_STATUS_BRANCH }}{{ end }} "
        },
        {
          "type": "text",
          "style": "powerline",
          "powerline_symbol": "\ue0b0",
          "foreground": "p:text",
          "background": "p:blue",
          "template": " {{ .Env.COPILOT_STATUS_TOKENS }} "
        },
        {
          "type": "text",
          "style": "diamond",
          "trailing_diamond": "\ue0b4",
          "foreground": "p:white",
          "background": "p:surface",
          "template": "{{ if .Env.COPILOT_STATUS_CHANGES }} {{ .Env.COPILOT_STATUS_CHANGES }} {{ end }}"
        }
      ]
    }
  ]
}

statusline.ps1

$ErrorActionPreference = 'Stop'
[Console]::OutputEncoding = [System.Text.UTF8Encoding]::new()

function Format-TokenCount {
    param([Nullable[double]]$Value)

    if ($null -eq $Value) { return '?' }
    if ($Value -ge 1000000) { return ('{0:0.0}m' -f ($Value / 1000000)) }
    if ($Value -ge 1000) { return ('{0:0}k' -f ($Value / 1000)) }
    return ([int][Math]::Round($Value)).ToString()
}

# Copilot sends the statusline payload as JSON on stdin.
$payload = [Console]::In.ReadToEnd()

try {
    $json = $payload | ConvertFrom-Json
} catch {
    Write-Host -NoNewline 'Copilot status unavailable'
    exit 0
}

$context = $json.context_window

$currentTokens = if ($null -ne $context.current_context_tokens) {
    [double]$context.current_context_tokens
} else {
    $null
}

$contextLimit = if ($null -ne $context.displayed_context_limit) {
    [double]$context.displayed_context_limit
} else {
    $null
}

$cost = $json.cost
$linesAdded = if ($null -ne $cost.total_lines_added) { [int]$cost.total_lines_added } else { 0 }
$linesRemoved = if ($null -ne $cost.total_lines_removed) { [int]$cost.total_lines_removed } else { 0 }

$theme = Join-Path $PSScriptRoot 'statusline.omp.json'
$cwd = if ($json.cwd) { [string]$json.cwd } else { (Get-Location).Path }
$folderName = Split-Path -Path $cwd -Leaf
if ([string]::IsNullOrWhiteSpace($folderName)) {
    $folderName = $cwd
}

$branchName = ''
# Only show a branch when the payload cwd is actually inside a git work tree.
$isRepo = & git -C $cwd rev-parse --is-inside-work-tree 2>$null
if ($LASTEXITCODE -eq 0 -and $isRepo -eq 'true') {
    $branchName = (& git -C $cwd branch --show-current 2>$null).Trim()
    if ([string]::IsNullOrWhiteSpace($branchName)) {
        $branchName = (& git -C $cwd rev-parse --short HEAD 2>$null).Trim()
    }
}

$env:COPILOT_STATUS_FOLDER = $folderName
$env:COPILOT_STATUS_BRANCH = $branchName
$env:COPILOT_STATUS_TOKENS = "$(Format-TokenCount $currentTokens)/$(Format-TokenCount $contextLimit)"
$env:COPILOT_STATUS_CHANGES = if ($linesAdded -or $linesRemoved) { "+$linesAdded/-$linesRemoved" } else { '' }

try {
    # Let Oh My Posh draw the final line; the script only prepares the data.
    $output = & oh-my-posh print primary --config $theme --pwd $cwd --force --escape=false 2>$null
    if ([string]::IsNullOrWhiteSpace($output)) {
        throw 'Oh My Posh returned no output.'
    }

    Write-Host -NoNewline $output.TrimEnd()
} catch {
    # Fallback stays readable if the theme cannot render for any reason.
    $branch = if ($env:COPILOT_STATUS_BRANCH) { " | $($env:COPILOT_STATUS_BRANCH)" } else { '' }
    $changes = if ($env:COPILOT_STATUS_CHANGES) { " | $($env:COPILOT_STATUS_CHANGES)" } else { '' }
    Write-Host -NoNewline "$($env:COPILOT_STATUS_FOLDER)$branch | $($env:COPILOT_STATUS_TOKENS)$changes"
}