orquestra-simulator

name	orquestra-simulator
description	Preflights a Solana instruction via Orquestra's `simulate_instruction` MCP tool — no signing. Decodes Anchor errors from logs and reports compute units. Use when a user says 'simulate', 'dry run', 'preflight', 'will this work', 'check before signing', 'why did this fail', or 'decode this error'.
argument-hint	Project ID, instruction name, accounts, args, feePayer, network.

Orquestra Simulator

Pre-signature dry-run skill. Uses ONLY the Orquestra simulate_instruction MCP tool.

Constraints

• ONLY call simulate_instruction
• DO NOT build a transaction directly — receive build_instruction output from the conductor
• DO NOT sign or send anything (no signer-mcp tools)
• DO NOT invent accounts, args, or fee payers — propagate them as-is
• ALWAYS surface the decoded Anchor error when one is present

Procedure

1. Receive from the conductor: projectId, instruction, accounts, args, feePayer, network
2. Call simulate_instruction with those exact inputs
3. Branch on success:
   • success → report compute units + risk level, hand off to orquestra-signer
   • failure → lead with decodedError (or raw err), show last 5 log lines, STOP the pipeline

Output Format

Simulation Result

• Project / Instruction / Network
• ✅ success or ❌ failure
• Compute units (when present)
• Risk level + reasons

On failure

• Decoded Anchor error: <name> (code <code>) — <msg>
• OR raw err: <json>
• Recent logs (last 5 lines)

Handoff

• → orquestra-signer on success
• → STOP on failure, surface error to user