diff --git a/README.md b/README.md
index da4fcaa..449adea 100644
--- a/README.md
+++ b/README.md
@@ -17,9 +17,9 @@
-By task type, tool, model, MCP server, and project. Tracks one-shot success rate per activity type so you can see where the AI nails it first try vs. burns tokens on edit/test/fix retries. Interactive TUI dashboard with gradient charts, responsive panels, and keyboard navigation. macOS menu bar widget via SwiftBar. CSV/JSON export.
+By task type, tool, model, MCP server, and project. Supports **Claude Code** and **Codex** (OpenAI) with a provider plugin system. Tracks one-shot success rate per activity type so you can see where the AI nails it first try vs. burns tokens on edit/test/fix retries. Interactive TUI dashboard with gradient charts, responsive panels, and keyboard navigation. macOS menu bar widget via SwiftBar. CSV/JSON export.
-Works by reading Claude Code session transcripts directly from disk. No wrapper, no proxy, no API keys. Pricing from LiteLLM (auto-cached, all models supported).
+Works by reading session transcripts directly from disk. No wrapper, no proxy, no API keys. Pricing from LiteLLM (auto-cached, all models supported).
## Install
@@ -36,7 +36,7 @@ npx codeburn
### Requirements
- Node.js 20+
-- Claude Code (reads `~/.claude/projects/` session data)
+- Claude Code (`~/.claude/projects/`) and/or Codex (`~/.codex/sessions/`)
## Usage
@@ -44,14 +44,61 @@ npx codeburn
codeburn # interactive dashboard (default: 7 days)
codeburn today # today's usage
codeburn month # this month's usage
-codeburn report -p month # same as above
+codeburn report -p 30days # rolling 30-day window
codeburn status # compact one-liner (today + month)
codeburn status --format json
codeburn export # CSV with today, 7 days, 30 days
codeburn export -f json # JSON export
```
-Arrow keys switch between Today / 7 Days / Month. Press `q` to quit, `1` `2` `3` as shortcuts.
+Arrow keys switch between Today / 7 Days / 30 Days / Month. Press `q` to quit, `1` `2` `3` `4` as shortcuts.
+
+## Providers
+
+CodeBurn auto-detects which AI coding tools you use. If both Claude Code and Codex have session data on disk, press `p` in the dashboard to toggle between them.
+
+```bash
+codeburn report # all providers combined (default)
+codeburn report --provider claude # Claude Code only
+codeburn report --provider codex # Codex only
+codeburn today --provider codex # Codex today
+codeburn export --provider claude # export Claude data only
+```
+
+The `--provider` flag works on all commands: `report`, `today`, `month`, `status`, `export`.
+
+### Supported providers
+
+| Provider | Data location | Status |
+|----------|--------------|--------|
+| Claude Code | `~/.claude/projects/` | Supported |
+| Claude Desktop | `~/Library/Application Support/Claude/local-agent-mode-sessions/` | Supported |
+| Codex (OpenAI) | `~/.codex/sessions/` | Supported |
+| Pi, OpenCode, Amp | -- | Planned (provider plugin system) |
+
+Codex tool names are normalized to match Claude's conventions (`exec_command` shows as `Bash`, `read_file` as `Read`, etc.) so the activity classifier and tool breakdown work across providers.
+
+### Adding a provider
+
+The provider plugin system makes adding a new provider a single file. Each provider implements session discovery, JSONL parsing, tool normalization, and model display names. See `src/providers/codex.ts` for an example.
+
+## Currency
+
+By default, costs are shown in USD. To display in a different currency:
+
+```bash
+codeburn currency GBP # set to British Pounds
+codeburn currency AUD # set to Australian Dollars
+codeburn currency JPY # set to Japanese Yen
+codeburn currency # show current setting
+codeburn currency --reset # back to USD
+```
+
+Any [ISO 4217 currency code](https://en.wikipedia.org/wiki/ISO_4217#List_of_ISO_4217_currency_codes) is supported (162 currencies). Exchange rates are fetched from [Frankfurter](https://www.frankfurter.app/) (European Central Bank data, free, no API key) and cached for 24 hours at `~/.cache/codeburn/`. Config is stored at `~/.config/codeburn/config.json`.
+
+The currency setting applies everywhere: dashboard, status bar, menu bar widget, CSV/JSON exports, and JSON API output.
+
+The menu bar widget includes a currency picker with 17 common currencies. For any currency not listed, use the CLI command above.
## Menu Bar
@@ -62,25 +109,7 @@ codeburn install-menubar # install SwiftBar/xbar plugin
codeburn uninstall-menubar # remove it
```
-Requires [SwiftBar](https://github.com/swiftbar/SwiftBar) (`brew install --cask swiftbar`). Shows today's cost in the menu bar with a flame icon. Dropdown shows activity breakdown, model costs, and token stats for today, 7 days, and month. Refreshes every 5 minutes.
-
-## Currency
-
-By default, costs are shown in USD. To display in a different currency:
-
-```bash
-codeburn config currency GBP # set to British Pounds
-codeburn config currency AUD # set to Australian Dollars
-codeburn config currency JPY # set to Japanese Yen
-codeburn config currency # show current setting
-codeburn config currency --reset # back to USD
-```
-
-Any [ISO 4217 currency code](https://en.wikipedia.org/wiki/ISO_4217#List_of_ISO_4217_currency_codes) is supported (162 currencies). Exchange rates are fetched from [Frankfurter](https://www.frankfurter.app/) (European Central Bank data, free, no API key) and cached for 24 hours at `~/.cache/codeburn/`. Config is stored at `~/.config/codeburn/config.json`.
-
-The currency setting applies everywhere: dashboard, status bar, menu bar widget, CSV/JSON exports, and JSON API output.
-
-The menu bar widget also includes a currency picker with 16 common currencies. For any currency not listed in the menu bar, use the CLI command above.
+Requires [SwiftBar](https://github.com/swiftbar/SwiftBar) (`brew install --cask swiftbar`). Shows today's cost in the menu bar with a flame icon. Dropdown shows activity breakdown, model costs, token stats, per-provider cost breakdown, and a currency picker. Refreshes every 5 minutes.
## What it tracks
@@ -102,17 +131,26 @@ The menu bar widget also includes a currency picker with 16 common currencies. F
| Conversation | No tools, pure text exchange |
| General | Skill tool, uncategorized |
-**Breakdowns**: daily cost chart, per-project, per-model (Opus/Sonnet/Haiku/GPT-4o/Gemini), per-activity with one-shot rate, core tools, MCP servers.
+**Breakdowns**: daily cost chart, per-project, per-model (Opus/Sonnet/Haiku/GPT-5/GPT-4o/Gemini), per-activity with one-shot rate, core tools, shell commands, MCP servers.
**One-shot rate**: For categories that involve code edits, CodeBurn detects edit/test/fix retry cycles (Edit -> Bash -> Edit patterns). The 1-shot column shows the percentage of edit turns that succeeded without retries. Coding at 90% means the AI got it right first try 9 out of 10 times.
-**Pricing**: Fetched from [LiteLLM](https://github.com/BerriAI/litellm) model prices (auto-cached 24h at `~/.cache/codeburn/`). Handles input, output, cache write, cache read, and web search costs. Fast mode multiplier for Claude. Fallback to hardcoded prices if fetch fails.
+**Pricing**: Fetched from [LiteLLM](https://github.com/BerriAI/litellm) model prices (auto-cached 24h at `~/.cache/codeburn/`). Handles input, output, cache write, cache read, and web search costs. Fast mode multiplier for Claude. Hardcoded fallbacks for all Claude and GPT-5 models to prevent fuzzy matching mispricing.
## How it reads data
-Claude Code stores session transcripts as JSONL at `~/.claude/projects//.jsonl`. Each assistant entry contains model name, token usage (input, output, cache read, cache write), tool_use blocks, and timestamps.
+**Claude Code** stores session transcripts as JSONL at `~/.claude/projects//.jsonl`. Each assistant entry contains model name, token usage (input, output, cache read, cache write), tool_use blocks, and timestamps.
-CodeBurn reads these files, deduplicates messages by API message ID (prevents double-counting across sessions), filters by date range per entry (not per session), and classifies each turn.
+**Codex** stores sessions at `~/.codex/sessions/YYYY/MM/DD/rollout-*.jsonl` with `token_count` events containing per-call and cumulative token usage, and `function_call` entries for tool tracking.
+
+CodeBurn reads these files, deduplicates messages (by API message ID for Claude, by cumulative token cross-check for Codex), filters by date range per entry, and classifies each turn.
+
+## Environment variables
+
+| Variable | Description |
+|----------|-------------|
+| `CLAUDE_CONFIG_DIR` | Override Claude Code data directory (default: `~/.claude`) |
+| `CODEX_HOME` | Override Codex data directory (default: `~/.codex`) |
## Project structure
@@ -120,7 +158,7 @@ CodeBurn reads these files, deduplicates messages by API message ID (prevents do
src/
cli.ts Commander.js entry point
dashboard.tsx Ink TUI (React for terminals)
- parser.ts JSONL reader, dedup, date filter
+ parser.ts JSONL reader, dedup, date filter, provider orchestration
models.ts LiteLLM pricing, cost calculation
classifier.ts 13-category task classifier
types.ts Type definitions
@@ -129,6 +167,11 @@ src/
export.ts CSV/JSON multi-period export
config.ts Config file management (~/.config/codeburn/)
currency.ts Currency conversion, exchange rates, Intl formatting
+ providers/
+ types.ts Provider interface definitions
+ index.ts Provider registry
+ claude.ts Claude Code session discovery
+ codex.ts Codex session discovery and JSONL parsing
```
## License
@@ -137,6 +180,6 @@ MIT
## Credits
-Inspired by [ccusage](https://github.com/ryoppippi/ccusage). Pricing data from [LiteLLM](https://github.com/BerriAI/litellm).
+Inspired by [ccusage](https://github.com/ryoppippi/ccusage). Pricing data from [LiteLLM](https://github.com/BerriAI/litellm). Exchange rates from [Frankfurter](https://www.frankfurter.app/).
Built by [AgentSeal](https://agentseal.org).