# claudbg

A CLI tool for inspecting [Claude Code](https://claude.ai/code) sessions.
Reads JSONL session files from `~/.claude/projects/`, caches them in a local
SQLite database, and lets you list, dump, and transcribe sessions and
sub-agent runs.

```
+----------+--------------------------+----------------------------+-------------------+----------+
| ID       | Date                     | Project                    | Model             | Messages |
+==========================================================================================================================+
| 21fae0a8 | 2026-03-28T20:36:00.417Z | /home/user/my-project      | claude-sonnet-4-6 | 663      |
| 80e9ebac | 2026-03-28T17:45:00.872Z | /home/user/my-project      | claude-sonnet-4-6 | 36       |
| 18b7e801 | 2026-03-28T03:13:13.354Z | /home/user/other-project   | claude-sonnet-4-6 | 239      |
+----------+--------------------------+----------------------------+-------------------+----------+
```

## Features

- **List sessions** sorted by most recent activity
- **Dump** raw message entries from any session
- **Transcribe** sessions as a human-readable chat log
- **Inspect sub-agent runs** with the same list/dump/transcribe commands
- **Live follow** (`--follow`) streams new entries as a session is written
- **Multiple output formats**: table, JSON, XML
- **Local cache** with lazy sync — only re-parses files that have changed on disk

## Installation

### Prerequisites

- Rust (stable) — install via [rustup](https://rustup.rs)

### From source

```bash
git clone https://github.com/pop/claudbg
cd claudbg
cargo install --path .
```

### With Nix flakes

```bash
nix run github:pop/claudbg
```

Or add to your flake inputs and install into your profile:

```nix
inputs.claudbg.url = "github:pop/claudbg";
```

## Usage

### Listing sessions

```bash
# Show all sessions, most recent first
claudbg sessions list

# Show full UUIDs and paths
claudbg sessions list --verbose

# Output as JSON
claudbg sessions list --output json
```

### Reading a session

Session IDs can be given as the full UUID or an 8-character prefix.

```bash
# Dump raw message entries (sequence, timestamp, type, role, content preview)
claudbg sessions dump 21fae0a8

# Full content, no truncation
claudbg sessions dump 21fae0a8 --verbose

# Human-readable transcript (user/assistant turns, tool calls)
claudbg sessions transcribe 21fae0a8

# Include thinking blocks and tool output in the transcript
claudbg sessions transcribe 21fae0a8 --include thinking,output

# Stream new entries as they are written (e.g. while a session is active)
claudbg sessions transcribe 21fae0a8 --follow
```

### Sub-agent runs

Claude Code uses sub-agents for long-running tasks. `claudbg agents`
mirrors the sessions commands for those runs.

```bash
# List all sub-agent runs within a session
claudbg agents list 21fae0a8

# Transcribe a specific sub-agent run
claudbg agents transcribe 21fae0a8 <agent-id>

# Follow a live sub-agent run
claudbg agents transcribe 21fae0a8 <agent-id> --follow
```

### Indexing

The database is kept in sync lazily (on every read command). You can also
trigger a full resync manually:

```bash
# Sync any changed session files
claudbg index

# Force rebuild of the entire cache
claudbg index --force
```

### Global flags

| Flag | Description |
|------|-------------|
| `--output table\|json\|xml` | Output format (default: `table`) |
| `--verbose` | Show full UUIDs and untruncated content |
| `--include thinking,output` | Include thinking blocks and/or tool results in transcripts |

## Database

claudbg stores its cache at `~/.claude/claudbg.db` (libsql/SQLite).
The JSONL files under `~/.claude/projects/` are always the source of truth —
the database is a read-through cache and can be deleted or rebuilt at any time.

## Roadmap

- **`tui`** — Terminal UI for browsing sessions interactively
- **`query`** — Run ad-hoc SQL against the session cache (`claudbg query "SELECT ..."`)
- **Token usage reports** — Aggregate cost/usage across sessions and date ranges
- **Search** — Full-text search across session content
- **Export** — Export transcripts to Markdown or HTML
- **Watch mode** — Automatically index new sessions as Claude Code writes them

## Development

The project uses [Nix flakes](https://nixos.wiki/wiki/Flakes) for a reproducible dev environment:

```bash
nix develop    # enter the dev shell (provides rustup, cargo-nextest, etc.)
cargo build
cargo nextest run
cargo clippy --all-targets -- -D warnings
nix flake check   # runs the full CI suite
```

## License

[MIT](LICENSE)