Oracle – Second Opinion Model

Invokes OpenAI’s GPT-5.2 extra high reasoning model via CLI for complex analysis tasks. It excels at debugging, code review, architecture analysis, and finding better solutions.

Prerequisite: Codex CLI installed and authenticated (codex login).

Trade-offs: Slower and more expensive than the main agent, but significantly better at complex reasoning. Use deliberately, not for every task.

Invocation

Use codex exec --profile oracle to run the reasoning model:

codex exec --profile oracle "Review @src/auth/jwt.ts for security vulnerabilities"

Examples

# Security review
codex exec --profile oracle "Review @src/auth/jwt.ts for security vulnerabilities. Provide specific fixes."

# Debugging
codex exec --profile oracle "Find why memory leak in @src/DataFetcher.tsx. Component doesn't clean up on unmount."

# Architecture analysis
codex exec --profile oracle "Analyze how @src/services/payment.ts and @src/services/order.ts interact. Propose refactoring plan."

# Complex bug investigation
codex exec --profile oracle "Bug: Users see stale data after updates. Check @src/cache/invalidation.ts for race conditions."

Prompting for Reasoning Models

Reasoning models work differently from completion models. Follow these guidelines:

Keep prompts simple and direct:

• State the goal clearly without excessive context
• Let the model explore and discover relevant information
• Avoid step-by-step instructions – the model reasons on its own

Focus on WHAT, not HOW:

• Bad: “First read the file, then analyze each function, then check for…”
• Good: “Review this code for security vulnerabilities”

Use @ syntax for file references:

• Include relevant files directly: @src/auth/login.ts
• The model will read and understand the code

Be specific about expected output:

• “Provide specific fixes” > “Is this correct?”
• “List all race conditions” > “Are there any bugs?”

Example Prompts

Security Review

Review @src/auth/jwt.ts for security vulnerabilities.
Provide specific fixes for any issues found.

Debugging

Find why the memory leak occurs in @src/components/DataFetcher.tsx.
The component fetches data but doesn't clean up on unmount.

Architecture Analysis

Analyze how @src/services/payment.ts and @src/services/order.ts interact.
Propose a refactoring plan that maintains backward compatibility.

Complex Bug Investigation

Bug: Users intermittently see stale data after updates.
Related files: @src/api/update.ts @src/cache/invalidation.ts @src/hooks/useData.ts

Identify race conditions or cache invalidation issues and provide a fix.

Workflow

Think step-by-step:

1. Gather context first: Identify relevant files and the specific problem
2. Formulate a focused prompt: Include file references with @, state the goal directly
3. Invoke the oracle: Run codex exec --profile oracle "prompt"
4. Continue if needed: Use codex exec resume SESSION_ID "follow-up" to refine analysis
5. Act on the analysis: Implement recommendations from the oracle’s response

Continuing Conversations

Use codex exec resume SESSION_ID to continue until satisfied. The session ID is returned from the initial invocation.

# Initial analysis (returns session ID)
codex exec --profile oracle "Review @src/auth/jwt.ts for security vulnerabilities"
# Output includes: Session ID: abc123...

# Continue with follow-up questions using the session ID
codex exec resume abc123 "Also check for timing attacks in the token validation"

# Keep refining with the same session
codex exec resume abc123 "What about the refresh token rotation logic?"

Rules

• Use the oracle for complex problems that require deep reasoning
• Keep prompts focused – one problem per invocation
• Include file references with @ syntax for relevant code
• Request specific, actionable output
• Chain with main agent: oracle for analysis, main agent for implementation
• Oracle is read-only; use the main agent to implement changes