opencode-codetime

CodeTime plugin for OpenCode -- track your AI coding activity and time spent.

Features

• Automatic time tracking -- sends coding events to CodeTime when OpenCode reads, edits, or writes files
• Check your coding time -- ask the AI "what's my coding time?" and it fetches your stats via the codetime tool
• Per-project filtering -- view coding time for the current project or any specific project
• Project breakdown -- see a ranked table of all projects with time spent today
• Language detection -- detects 90+ programming languages from file extensions
• Git integration -- captures current branch and remote origin
• Project identification -- shows as directory-name [opencode] on your CodeTime dashboard
• Rate-limited -- one heartbeat per 2 minutes to avoid API spam
• Session lifecycle -- flushes pending events on session end so no data is lost
• Zero config -- just set your token and go

Prerequisites

A CodeTime account. Sign up for free at codetime.dev.

Get your upload token from CodeTime Settings.

Installation

Via opencode config (recommended)

Add to your opencode.json:

{
  "$schema": "https://opencode.ai/config.json",
  "plugin": ["opencode-codetime"]
}

From source

git clone https://github.com/roman-pinchuk/opencode-codetime
cd opencode-codetime
npm install && npm run build

Then copy the built files to your OpenCode plugins directory:

mkdir -p ~/.config/opencode/plugins
cp dist/*.js ~/.config/opencode/plugins/

Configuration

Set your CodeTime upload token as an environment variable:

export CODETIME_TOKEN="your-upload-token-here"

Add it to your shell profile (~/.bashrc, ~/.zshrc, etc.) to persist across sessions.

The plugin validates the token on startup and logs a warning if it is missing or invalid.

How It Works

The plugin hooks into OpenCode's event system to detect file activity.

OpenCode events                    Plugin                         CodeTime API
+-----------------------+     +------------------+     +------------------------+
| message.part.updated  | --> | Extract files    | --> | POST /v3/users/event-log|
| (edit, write, read,   |     | Detect language  |     |                        |
|  patch, multiedit)    |     | Rate limit (2m)  |     | { eventTime, language, |
+-----------------------+     +------------------+     |   project, relativeFile,|
| session.idle          | --> | Force flush      |     |   editor: "opencode",  |
| session.deleted       |     | pending events   |     |   platform, git info } |
+-----------------------+     +------------------+     +------------------------+

What gets tracked

Each heartbeat sent to CodeTime includes:

Field	Value
eventTime	Unix timestamp of the event
language	Detected from file extension (e.g. TypeScript, Python)
project	directory-name [opencode]
relativeFile	File path relative to the project root
editor	opencode
platform	OS platform (darwin, linux, windows)
gitOrigin	Remote origin URL (if available)
gitBranch	Current branch name (if available)

Hooks used

Hook	Purpose
event	Listens for message.part.updated (tool completions) and session.idle/session.deleted (flush)
chat.message	Processes pending heartbeats on chat activity
tool	Registers codetime tool to check today's coding time

Commands

Command	Description
/codetime	Show today's total coding time
/codetime-breakdown	Show today's coding time broken down by project

codetime tool

The codetime tool supports optional arguments for project filtering:

Argument	Type	Description
project	string (optional)	Filter by project name. Use "current" to auto-detect the current project. Omit to show total time.
breakdown	boolean (optional)	When true, show a ranked breakdown of all projects.

Usage examples (in natural language to the AI):

• "What's my coding time?" -- shows total time across all projects
• "How long have I been coding on this project?" -- shows time for the current project
• "Show me a breakdown of my coding time by project" -- shows ranked project list
• "How much time did I spend on my-app today?" -- shows time for a specific project

Example outputs:

# Total time (default)
Today's coding time: 2h 42m

# Current project
Today's coding time for opencode-codetime [opencode]: 1h 23m (Total across all projects: 2h 42m)

# Project breakdown
Today's coding time by project:

  opencode-codetime [opencode]    1h 23m
  my-other-project [vscode]         52m
  side-project [opencode]           27m
  ──────────────────────────────────────
  Total                           2h 42m

Tool tracking

Tool	Data Extracted
read	File path from title
edit	File path from filediff metadata
write	File path from metadata
patch	File paths from output
multiedit	File paths from each edit result

Project Structure

src/
  index.ts        Main plugin entry point with event hooks
  codetime.ts     CodeTime API client (token validation, heartbeats, stats)
  state.ts        Rate limiter (max 1 heartbeat per 2 minutes)
  language.ts     File extension to language name mapping
  git.ts          Git branch and remote origin extraction
  logger.ts       Structured logging via OpenCode SDK

Development

# Install dependencies
npm install

# Type check
npm run typecheck

# Build
npm run build

Troubleshooting

Plugin not loading

1. Verify opencode.json syntax
2. Check that CODETIME_TOKEN is set in your environment
3. Check OpenCode logs for opencode-codetime messages

Heartbeats not appearing in CodeTime

1. Verify your token at codetime.dev/dashboard/settings
2. Make sure you are editing files (not just chatting) -- heartbeats fire on tool completions
3. Wait up to 2 minutes for rate-limited heartbeats to flush
4. Check that the CodeTime API is reachable: curl -s https://api.codetime.dev/v3

Token validation fails

1. Regenerate your token at codetime.dev/dashboard/settings
2. Make sure the token has no leading/trailing whitespace

License

MIT