Copy this prompt and paste it into your coding agent to add TwoTail tracing:
Connect Langfuse
Keep Langfuse for tracing. TwoTail pulls a read-only copy of your traces and runs the analyst on top: no code changes, and your recent history is imported so answers start immediately. Paste the keys your app already uses (LANGFUSE_PUBLIC_KEY / LANGFUSE_SECRET_KEY in its environment), or create a dedicated key in Langfuse → Project Settings → API Keys (needs Owner or Admin).
Langfuse
Autonomy
Projects
Project
Daily Update
Task
EvalsLast 30 days
Eval Detail
Daily issues by category
Judge Prompt
Rubric key
Failure taxonomy
Judge Prompt
Slack alerts
Sandbox
Autonomy runs experiments here as it investigates. You can also start one manually.
New sandbox run
1Type
2Task
3Variants
4Evals
5Inputs
6Review
What do you want to test?
Which task do you want to test?
Pick an LLM call from your production traces.
Define your variants
First row = baseline (from your latest prod span). Add one variant to A/B against it.
Which evals?
These run against every variant so you can compare quality. They're also available as an input filter on the next step.
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Which inputs should we run against?
Review and launch
Sandbox run
Preparing…
Tradeoffs
Recommendation
Datasets
Static collections of (input, output, eval) rows. Used for golden sets, calibration, annotation, and sandbox runs. Autonomy builds these as it works; you can also create one manually.
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Annotate
Review spans your judge evals flagged. Each judgment is stored as a human eval span next to the judge's score.
New dataset
Add row
Vocabulary
Help the analyst understand your agent's structure and goals
Strategy
Describe your agent's goals and what you're optimizing for
Terminology
Define business terms, KPIs, and domain-specific concepts
Data Structure
Span hierarchy and metadata fields (auto-generated from your traces)
Agent Change Log
Record dated changes to your agent (model swaps, prompt updates, deploys) so analysis can tie trends to causes
API Keys
Manage API keys for sending trace data to TwoTail.
Create New Key
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Your Keys
Team Settings
Manage team members and invitations for
Invite Team Members
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Team Members
Pending Invites
Welcome to TwoTail
Sign in to access your agent analytics
Team Invitation
Trace
Span Details
Save Chart
Time range:
Privacy Settings
Control what data your coding agent sends to TwoTail.