debug-mode

What this skill does

plugin: agentdev
updated: 2026-01-20

# AgentDev Debug Mode

Debug mode captures detailed session information for analysis, debugging, and optimization.
All events are recorded to a JSONL file in `claude-code-session-debug/`.

## Configuration

Debug mode uses **per-project configuration** stored in `.claude/agentdev-debug.json`.

### Config File Format

Location: `.claude/agentdev-debug.json` (in project root)

```json
{
  "enabled": true,
  "level": "standard",
  "created_at": "2026-01-09T07:00:00Z"
}
```

**Fields:**
- `enabled`: boolean - Whether debug mode is active
- `level`: string - Debug level (minimal, standard, verbose)
- `created_at`: string - ISO timestamp when config was created

## Enabling Debug Mode

Use the command to create the config file:

```
/agentdev:debug-enable
```

This creates `.claude/agentdev-debug.json` with `enabled: true`.

Or manually create the file:

```bash
mkdir -p .claude
cat > .claude/agentdev-debug.json << 'EOF'
{
  "enabled": true,
  "level": "standard",
  "created_at": "2026-01-09T07:00:00Z"
}
EOF
```

## Debug Levels

| Level | Captured Events |
|-------|-----------------|
| `minimal` | Phase transitions, errors, session start/end |
| `standard` | All of minimal + tool invocations, agent delegations |
| `verbose` | All of standard + skill activations, hook triggers, full parameters |

Default level is `standard`.

### Changing Debug Level

Using jq:
```bash
jq '.level = "verbose"' .claude/agentdev-debug.json > tmp.json && mv tmp.json .claude/agentdev-debug.json
```

## Output Location

Debug sessions are saved to:

```
claude-code-session-debug/agentdev-{slug}-{timestamp}-{id}.jsonl
```

Example:
```
claude-code-session-debug/agentdev-graphql-reviewer-20260109-063623-ba71.jsonl
```

## JSONL Format

Each line in the JSONL file is a complete JSON event object. This append-only format is:
- Crash-resilient (no data loss on unexpected termination)
- Easy to process with `jq`
- Streamable during the session

### Event Schema (v1.0.0)

```json
{
  "event_id": "550e8400-e29b-41d4-a716-446655440001",
  "correlation_id": null,
  "timestamp": "2026-01-09T06:40:00Z",
  "type": "tool_invocation",
  "data": { ... }
}
```

**Fields:**
- `event_id`: Unique UUID for this event
- `correlation_id`: Links related events (e.g., tool_invocation -> tool_result)
- `timestamp`: ISO 8601 timestamp
- `type`: Event type (see below)
- `data`: Type-specific payload

### Event Types

| Type | Description |
|------|-------------|
| `session_start` | Session initialization with metadata |
| `session_end` | Session completion |
| `tool_invocation` | Tool called with parameters |
| `tool_result` | Tool execution result |
| `skill_activation` | Skill loaded by agent |
| `hook_trigger` | PreToolUse/PostToolUse hook fired |
| `agent_delegation` | Task delegated to sub-agent |
| `agent_response` | Sub-agent returned result |
| `phase_transition` | Workflow phase changed |
| `user_interaction` | User approval/input requested |
| `proxy_mode_request` | External model request via Claudish |
| `proxy_mode_response` | External model response |
| `error` | Error occurred |

## What Gets Captured

### Session Metadata
- Session ID and path
- User request
- Environment (Claudish availability, plugin version)
- Start/end timestamps

### Tool Invocations
- Tool name
- Parameters (sanitized - credentials redacted)
- Execution context (phase, agent)
- Duration and result size

### Agent Delegations
- Target agent name
- Prompt preview (first 200 chars)
- Proxy mode model if used
- Session path

### Proxy Mode
- Model ID
- Request/response duration
- Success/failure status

### Phase Transitions
- From/to phase numbers and names
- Transition reason (completed, skipped, failed)
- Quality gate results

### Errors
- Error type (tool_error, hook_error, agent_error, etc.)
- Message and stack trace
- Context (phase, agent, tool)
- Recoverability

## Sensitive Data Protection

Debug mode automatically sanitizes sensitive data:

**Redacted Patterns:**
- API keys (`sk-*`, `ghp_*`, `AKIA*`, etc.)
- Tokens (bearer, access, auth)
- Passwords and secrets
- AWS credentials
- Slack tokens (`xox*`)
- Google API keys (`AIza*`)

## Analyzing Debug Output

### Prerequisites

Install `jq` for JSON processing:
```bash
# macOS
brew install jq

# Linux
apt-get install jq
```

### Quick Statistics

```bash
# Count events by type
cat session.jsonl | jq -s 'group_by(.type) | map({type: .[0].type, count: length})'
```

### Tool Usage Analysis

```bash
# Tool invocation counts
cat session.jsonl | jq -s '
  [.[] | select(.type == "tool_invocation") | .data.tool_name]
  | group_by(.)
  | map({tool: .[0], count: length})
  | sort_by(-.count)'
```

### Failed Operations

```bash
# Find all errors and failed tool results
cat session.jsonl | jq 'select(.type == "error" or (.type == "tool_result" and .data.success == false))'
```

### Timeline View

```bash
# Chronological event summary
cat session.jsonl | jq '"\(.timestamp) [\(.type)] \(.data | keys | join(", "))"'
```

### Event Correlation

```bash
# Find tool invocation and its result
INVOCATION_ID="550e8400-e29b-41d4-a716-446655440001"
cat session.jsonl | jq "select(.event_id == \"$INVOCATION_ID\" or .correlation_id == \"$INVOCATION_ID\")"
```

### Phase Duration Analysis

```bash
# Calculate time between phase transitions
cat session.jsonl | jq -s '
  [.[] | select(.type == "phase_transition")]
  | sort_by(.timestamp)
  | .[]
  | {phase: .data.to_name, timestamp: .timestamp}'
```

### Agent Delegation Timing

```bash
# Find slowest agent delegations
cat session.jsonl | jq -s '
  [.[] | select(.type == "agent_response")]
  | sort_by(-.data.duration_ms)
  | .[:5]
  | .[]
  | {agent: .data.agent, duration_sec: (.data.duration_ms / 1000)}'
```

### Proxy Mode Performance

```bash
# External model response times
cat session.jsonl | jq -s '
  [.[] | select(.type == "proxy_mode_response")]
  | .[]
  | {model: .data.model_id, success: .data.success, duration_sec: (.data.duration_ms / 1000)}'
```

## Disabling Debug Mode

Use the command:
```
/agentdev:debug-disable
```

Or manually update:
```bash
jq '.enabled = false' .claude/agentdev-debug.json > tmp.json && mv tmp.json .claude/agentdev-debug.json
```

Or delete the config file:
```bash
rm -f .claude/agentdev-debug.json
```

## Cleaning Up Debug Files

### Remove All Debug Files

```bash
rm -rf claude-code-session-debug/
```

### Remove Files Older Than 7 Days

```bash
find claude-code-session-debug/ -name "*.jsonl" -mtime +7 -delete
```

### Remove Files Larger Than 10MB

```bash
find claude-code-session-debug/ -name "*.jsonl" -size +10M -delete
```

## File Permissions

Debug files are created with restrictive permissions:
- Directory: `0o700` (owner only)
- Files: `0o600` (owner read/write only)

This prevents other users from reading potentially sensitive session data.

## Example Session Output

```jsonl
{"event_id":"init-1736408183","timestamp":"2026-01-09T06:36:23Z","type":"session_start","data":{"schema_version":"1.0.0","session_id":"agentdev-graphql-reviewer-20260109-063623-ba71","user_request":"Create an agent that reviews GraphQL schemas","session_path":"ai-docs/sessions/agentdev-graphql-reviewer-20260109-063623-ba71","environment":{"claudish_available":true,"plugin_version":"1.4.0","jq_available":true}}}
{"event_id":"550e8400-e29b-41d4-a716-446655440001","timestamp":"2026-01-09T06:36:25Z","type":"tool_invocation","data":{"tool_name":"TodoWrite","parameters":{"todos":"[REDACTED]"},"context":{"phase":0,"agent":null}}}
{"event_id":"550e8400-e29b-41d4-a716-446655440002","correlation_id":"550e8400-e29b-41d4-a716-446655440001","timestamp":"2026-01-09T06:36:25Z","type":"tool_result","data":{"tool_name":"TodoWrite","success":true,"result_size_bytes":156,"duration_ms":12}}
{"event_id":"550e8400-e29b-41d4-a716-446655440003","timestamp":"2026-01-09T06:36:26Z","type":"phase_transition","data":{"from_phase":null,"to_phase":0,"from_name":null,"to_name":"Init","transition_reason":"completed"