Braintrust Analysis

Analyze your Claude Code sessions for patterns, issues, and insights using Braintrust tracing data.

When to Use

• After completing a complex task (retrospective)

• When debugging why something failed

• Weekly review of productivity patterns

• Finding opportunities to create new skills

• Understanding token usage trends

Commands

Run from the project directory:

Analyze last session - summary with tool/agent/skill breakdown

uv run python -m runtime.harness scripts/braintrust_analyze.py --last-session

List recent sessions

uv run python -m runtime.harness scripts/braintrust_analyze.py --sessions 5

Agent usage statistics (last 7 days)

uv run python -m runtime.harness scripts/braintrust_analyze.py --agent-stats

Skill usage statistics (last 7 days)

uv run python -m runtime.harness scripts/braintrust_analyze.py --skill-stats

Detect loops - find repeated tool patterns (>5 same tool calls)

uv run python -m runtime.harness scripts/braintrust_analyze.py --detect-loops

Replay specific session - show full sequence of actions

uv run python -m runtime.harness scripts/braintrust_analyze.py --replay <session-id>

Weekly summary - daily activity breakdown

uv run python -m runtime.harness scripts/braintrust_analyze.py --weekly-summary

Token trends - usage over time

uv run python -m runtime.harness scripts/braintrust_analyze.py --token-trends

Options

• --project NAME
• Braintrust project name (default: agentica)

What You'll Learn

Session Analysis

• Tool usage breakdown

• Agent spawns (plan-agent, debug-agent, etc.)

• Skill activations (/commit, /research, etc.)

• Token consumption estimates

Loop Detection

Find sessions where the same tool was called repeatedly, which may indicate:

• Stuck in a search loop

• Inefficient approach

• Opportunity for better tooling

Usage Patterns

• Which agents you use most

• Which skills get activated

• Daily/weekly activity trends

Examples

Quick Retrospective

What happened in my last session?

uv run python -m runtime.harness scripts/braintrust_analyze.py --last-session

Output:

Session Analysis

ID: 92940b91... Started: 2025-12-24T01:31:05Z Spans: 14

Tool Usage

• Read: 4
• Bash: 2
• Edit: 2 ...

Find Loops

uv run python -m runtime.harness scripts/braintrust_analyze.py --detect-loops

Weekly Review

uv run python -m runtime.harness scripts/braintrust_analyze.py --weekly-summary

Requirements

• BRAINTRUST_API_KEY in ~/.claude/.env or project .env

• Braintrust tracing enabled (via braintrust-claude-plugin)