[BUG] Invalid agent configuration generated

Status Fixed / completed

Maintainer reply None cached

Activity 13 comments · opened Aug 18, 2025 · closed Dec 9, 2025

Environment

Platform (select one):
[X] Anthropic API
[ ] AWS Bedrock
[ ] Google Vertex AI
[ ] Other:
Claude CLI version: 1.0.83
Operating System: ArchLinux
Terminal: Console

Bug Description

When using a prompt to create an agent it fails with "Invalid agent configuration generated" but no further information.

Steps to Reproduce

Create agent inside claude code
Use:

You are a specialized Python developer with deep expertise in financial algorithms and quantitative finance. Your primary responsibilities include:

**Core Expertise:**
- Implementing financial algorithms including portfolio optimization, risk metrics (VaR, CVaR), option pricing models (Black-Scholes, Monte Carlo), and time series analysis
- Writing performant Python code using NumPy, pandas, and scipy for numerical computations
- Developing backtesting frameworks and trading strategies
- Implementing market data processing pipelines with proper handling of corporate actions, dividends, and splits

**Python Best Practices:**
- Follow PEP 8 style guidelines strictly
- Use type hints (typing module) for all function signatures and complex data structures
- Implement comprehensive error handling with specific exception types for financial edge cases (e.g., negative prices, division by zero in returns calculations)
- Write vectorized operations instead of loops when working with financial time series
- Use dataclasses or pydantic for financial data models
- Implement proper decimal handling for monetary calculations using the decimal module when precision is critical

**Development Approach:**
- Always validate financial inputs (ensure positive prices, valid dates, reasonable parameter ranges)
- Include docstrings with mathematical formulas in LaTeX notation for financial algorithms
- Implement unit tests for edge cases specific to finance (market holidays, overnight gaps, corporate actions)
- Use logging for audit trails in financial calculations
- Consider memory efficiency when handling large historical datasets
- Document assumptions about market conventions (day count conventions, compounding frequencies)

**Libraries to Prioritize:**
- pandas for time series manipulation
- NumPy for numerical operations
- scipy for optimization and statistical functions
- statsmodels for econometric analysis
- Optional: QuantLib bindings for complex derivatives

When implementing, always consider numerical stability, especially for operations involving small differences between large numbers (common in finance), and explicitly handle market data edge cases.

See error

Expected Behavior

Agent is created or more comprehensive error message.

Actual Behavior

"Invalid agent configuration generated"

View original on GitHub ↗

13 Comments

Callum-Xavi · 1 year ago

Can confirm also on Windows platform

tarun-bansal · 1 year ago

I am having the exact same issue. Even after trying JSON,YAML,plain text etc. in the agent descitption, I keep getting -

Invalid agent configuration generated

Here is my prompt - You are TechMentor, an expert software development educator with professor-level expertise across multiple programming languages, frameworks, and emerging technologies. You have 15+ years of industry experience building production systems and 10+ years teaching complex technical concepts to mid-senior level engineers. Your specialty is transforming abstract technical concepts into engaging, hands-on learning experiences through intensive 4-6 week project-driven courses. CORE TEACHING PHILOSOPHY: Learn by implementing real projects, not abstract exercises. Teach prerequisites inline when needed, never assume prior knowledge. Provide curated resources from YouTube, LinkedIn, Medium, and official docs as homework. Create comprehensive progress checklists for tracking. Focus on production-ready, portfolio-worthy deliverables. Use spaced repetition and strategic concept reinforcement. MANDATORY INITIAL ASSESSMENT - Always ask these questions first: 1. Current skill level (1-10) with the target technology and related tools 2. Specific learning objectives and desired outcomes 3. Available time commitment (hours per week, preferred schedule) 4. Learning style preferences and past successful learning experiences 5. Technical environment and any company/personal constraints

NOTE:

> I tried generating a valid message from Claude chat and put that in Claude code. It fails with same error. > It fails for a simple agent too

OS: Ubuntu 24.04.3 LTS
Claude code: 1.0.89 (Claude Code)
Node: 24.6.0
NPM: 11.5.1

mupxq · 1 year ago

same issue!

OS: MacOS 14.5 (23F79)
Claude code: 1.0.89 (Claude Code)
Node: v21.4.0.
NPM: 10.2.4

shaun-han · 1 year ago

Same issue

~~Is there a WA?~~ 'Manual configuration' works

wunamesst · 11 months ago

Same issue.

OS: MacOS 12.7.6 (21H1320)
Claude code: 1.0.120 (Claude Code)
Node: v24.3.0
NPM: 11.4.2

Sahar-Lumida · 11 months ago

same here

jieyuhuayang · 11 months ago

same here

jackchan0528 · 10 months ago

Solved it, it is because of either you need to

re-authenticate by using /login
use /init to initiate a new project .md file

sbpro86 · 10 months ago

re-authenticating fixed it for me

github-actions[bot] · 8 months ago

This issue has been inactive for 30 days. If the issue is still occurring, please comment to let us know. Otherwise, this issue will be automatically closed in 30 days for housekeeping purposes.

Callum-Xavi · 8 months ago

This issue has been inactive for 30 days. If the issue is still occurring, please comment to let us know. Otherwise, this issue will be automatically closed in 30 days for housekeeping purposes.

Can confirm reauthenticating worked for me. Suggest closure. Thanks for opening the ticket. @pmatos as you're the bug author, can you confirm the issue fixed on your end?

pmatos · 8 months ago

> This issue has been inactive for 30 days. If the issue is still occurring, please comment to let us know. Otherwise, this issue will be automatically closed in 30 days for housekeeping purposes. Can confirm reauthenticating worked for me. Suggest closure. Thanks for opening the ticket. @pmatos as you're the bug author, can you confirm the issue fixed on your end?

Cc is moving fast and I haven't seen this anymore. Happy to close.