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- Replace Arize with Langfuse in observability section for accurate tracing information. - Adjust styles for Client and Langfuse in the flowchart for better visual distinction. - Correctly format connections in the system flowchart for clarity. - Update environment variable from PHOENIX_ENDPOINT to LANGFUSE_BASE_URL for consistency. - Change observability exporters section title from Arize/Phoenix to Langfuse.
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Reviewer's GuideUpdates the README’s observability documentation and diagrams to reflect a migration from Arize/Phoenix to Langfuse, adjusts Mermaid flowchart styles and edge syntax for clarity, and aligns environment variable names with the new observability stack. Flow diagram for updated observability section with Langfusegraph TB
subgraph "🧠 Core System"
Client[Client UI] --> UI[Next.js App]
UI --> App[Mastra App]
App --> Agents[Agents]
Agents --> Postgres[(Postgres + PgVector)]
end
subgraph "📊 Observability"
Agents --> Langfuse[Langfuse Traces<br/>• 97% Traced<br/>• 10+ Scorers]
Postgres --> Langfuse
end
UI --> App
App --> Agents
style Client fill:#e8f5e9,stroke:#ff9800
style Langfuse fill:#e8f5e9,stroke:#ff9800
style UI fill:#e8f5e9,stroke:#64b5f6
Flow diagram for updated system flowchart in READMEflowchart TD
A[app/chat] -->|components| B[chat-header.tsx]
A -->|components| C[chat-messages.tsx]
A -->|components| D[chat-input.tsx]
A -->|config| E[agents.ts]
A -->|providers| F[chat-context.tsx]
G[app/networks] -->|components| H[network-header.tsx]
G -->|components| I[network-messages.tsx]
G -->|config| J[networks.ts]
G -->|providers| K[network-context.tsx]
L[app/workflows] -->|components| M[workflow-canvas.tsx]
L -->|components| N[workflow-header.tsx]
L -->|config| O[workflows.ts]
L -->|providers| P[workflow-context.tsx]
Q[app/dashboard] -->|components| R[dashboard.tsx]
Q -->|components| S[agent-list.tsx]
Q -->|providers| T[dashboard-context.tsx]
U[lib] -->|hooks| V[use-mastra.ts]
U -->|hooks| W[use-dashboard-queries.ts]
U -->|utils| X[utils.ts]
U -->|client| Y[mastra-client.ts]
Z[src/types] -->|api| AA[mastra-api.ts]
AB[src/mastra/index.ts] -->|imports| AC[agents/*]
AB -->|imports| AD[tools/*]
AB -->|imports| AE[workflows/*]
AB -->|imports| AF[networks/*]
AB -->|imports| AG[config/*]
style A fill:#e8f5e9,stroke:#81c784
style G fill:#e8f5e9,stroke:#81c784
style L fill:#e8f5e9,stroke:#81c784
style Q fill:#e8f5e9,stroke:#81c784
style U fill:#e3f2fd,stroke:#64b5f6
style Z fill:#e3f2fd,stroke:#64b5f6
style AB fill:#000000,stroke:#ff9800
File-Level Changes
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Caution Review failedThe pull request is closed. Summary by CodeRabbitRelease Notes
✏️ Tip: You can customize this high-level summary in your review settings. WalkthroughREADME.md has been updated to replace Arize/Phoenix observability tooling with Langfuse throughout diagrams and documentation. Environment variable references changed from PG_CONNECTION to LANGFUSE_BASE_URL with SUPABASE as the new RAG setup key. Mermaid diagram syntax corrected by removing stray "<" annotations. Diagram styling enhanced with stroke colors for consistency. Changes
Estimated code review effort🎯 2 (Simple) | ⏱️ ~10 minutes
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Summary of ChangesHello @ssdeanx, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request updates the README.md file to reflect a significant change in the project's observability stack, transitioning from Arize/Phoenix to Langfuse. The changes ensure that the documentation accurately represents the current system architecture, including updated environment variables, flowchart diagrams, and descriptive text, providing a clear and up-to-date overview for users and contributors. Highlights
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Hey there - I've reviewed your changes - here's some feedback:
- Double-check the
PG_CONNECTION→SUPABASEenv var rename aligns with the actual configuration keys used in the codebase, as this could easily desync the README from the runtime config. - The
style AB fill:#000000,stroke:#ff9800change will render black text on a black background in Mermaid by default; consider using a lighter fill color or explicitly setting a contrasting font color. - The new styles for
Client,Langfuse, andUIall reuse the same fill color, which may reduce visual distinction in the observability diagram compared to the previous palette; consider varying fill colors if the goal is clearer differentiation.
Prompt for AI Agents
Please address the comments from this code review:
## Overall Comments
- Double-check the `PG_CONNECTION` → `SUPABASE` env var rename aligns with the actual configuration keys used in the codebase, as this could easily desync the README from the runtime config.
- The `style AB fill:#000000,stroke:#ff9800` change will render black text on a black background in Mermaid by default; consider using a lighter fill color or explicitly setting a contrasting font color.
- The new styles for `Client`, `Langfuse`, and `UI` all reuse the same fill color, which may reduce visual distinction in the observability diagram compared to the previous palette; consider varying fill colors if the goal is clearer differentiation.Help me be more useful! Please click 👍 or 👎 on each comment and I'll use the feedback to improve your reviews.
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Code Review
This pull request updates the README.md to reflect the migration from Arize/Phoenix to Langfuse for observability. The changes correctly update the architecture diagrams, environment variables table, and section headers.
However, the update appears to be incomplete and contains some inconsistencies. I found several remaining references to Arize/Phoenix that should be updated for consistency:
- In
README.md:- Line 60: The comparison table still lists "Full Arize/Phoenix tracing".
- Line 80: The core capabilities list mentions "Arize/Phoenix traces".
- Line 646: The contribution guidelines mention "Arize spans".
- In
src/mastra/config/AGENTS.md:- Line 61: The environment variables section still lists
PHOENIX_ENDPOINT.
- Line 61: The environment variables section still lists
Additionally, there are a couple of other inconsistencies:
- The environment variable
PG_CONNECTIONwas changed toSUPABASEinREADME.md(line 556), but this change is not reflected insrc/mastra/config/AGENTS.md(line 45), which still refers toPG_CONNECTION. - The PR description does not mention the change from
PG_CONNECTIONtoSUPABASE.
I've left one specific comment regarding a styling issue in one of the updated Mermaid diagrams that affects readability. Please address these points to ensure the documentation is fully consistent with the codebase changes.
| style U fill:#e3f2fd,stroke:#64b5f6 | ||
| style Z fill:#e3f2fd,stroke:#64b5f6 | ||
| style AB fill:#fff3e0,stroke:#ff9800 | ||
| style AB fill:#000000,stroke:#ff9800 |
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The fill color for the src/mastra/index.ts node (AB) in this Mermaid diagram has been set to black (#000000). This will make the node's label unreadable, as the default text color is also black. To ensure the diagram is clear, please use a lighter fill color that provides sufficient contrast. The previous color #fff3e0 would work well.
| style AB fill:#000000,stroke:#ff9800 | |
| style AB fill:#fff3e0,stroke:#ff9800 |
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Greptile OverviewGreptile SummaryThis PR migrates the observability documentation from Arize/Phoenix to Langfuse across the README, including:
Issues Found:
Confidence Score: 3/5
Important Files ChangedFile Analysis
Sequence DiagramsequenceDiagram
participant Dev as Developer
participant README as README.md
participant Obs as Observability System
participant Env as Environment Config
Dev->>README: Update observability references
Note over README: Line 109: Arize → Langfuse
Note over README: Line 110: Connection updated
Dev->>README: Fix flowchart syntax
Note over README: Lines 125-164: |< → |
Note over README: Correct Mermaid arrows
Dev->>README: Update environment variables
Note over README: Line 556: PG_CONNECTION → SUPABASE
Note over README: Line 560: PHOENIX_ENDPOINT → LANGFUSE_BASE_URL
Dev->>README: Update observability section
Note over README: Line 586: Section title updated
README-->>Obs: Documentation now references Langfuse
README-->>Env: New env var names documented
Note over README: ⚠️ Missed references:<br/>Line 60, 80, 646 still mention Arize/Phoenix
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Additional Comments (3)
-
README.md, line 60 (link)syntax: inconsistent with the rest of the PR - should be updated to
Langfuseto match the changes made elsewhere in the document -
README.md, line 80 (link)syntax: inconsistent with the PR - should reference
Langfuseinstead ofArize/Phoenix -
README.md, line 646 (link)syntax: inconsistent with the observability migration - should be
Langfuseinstead ofArize
1 file reviewed, 3 comments
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Pull request overview
This PR updates the documentation to migrate from Arize/Phoenix to Langfuse as the observability platform, while also improving the readability of mermaid flowchart syntax.
Key changes:
- Replaces Arize/Phoenix references with Langfuse across diagrams and configuration tables
- Fixes flowchart arrow syntax (removes
<characters) for proper rendering - Updates environment variable from
PG_CONNECTIONtoSUPABASEfor consistency with.env.example
| style U fill:#e3f2fd,stroke:#64b5f6 | ||
| style Z fill:#e3f2fd,stroke:#64b5f6 | ||
| style AB fill:#fff3e0,stroke:#ff9800 | ||
| style AB fill:#000000,stroke:#ff9800 |
There was a problem hiding this comment.
The style uses a black fill color (#000000) which may make the text difficult to read in the diagram. Consider using a lighter background color consistent with other elements in the flowchart. For example: style AB fill:#fff3e0,stroke:#ff9800 (as it was before) or another light color that provides good contrast.
| style AB fill:#000000,stroke:#ff9800 | |
| style AB fill:#fff3e0,stroke:#ff9800 |
Summary by Sourcery
Update documentation to reflect Langfuse-based observability and improved system diagrams.
Documentation: