orquestra-simulator

orquestra-simulator is a skill for Claude Code from berkayoztunc/orquestra. It costs 77 tokens per session (411 once invoked), scanned A, original, MIT.

A pre-signing checker for Solana instructions, which are individual requests sent to the Solana blockchain. It runs a simulation through Orquestra without signing or sending the transaction.

In plain words
What is it for?
Use it to dry-run an instruction, check whether it is likely to work, investigate a failed simulation, and review recent program logs before signing.
Why use it?
It lets you find failures before anything is authorized on-chain. It also explains Anchor program errors and shows how much computation the instruction used.

Skill for Claude Code

Written for Claude Code: argument-hint in frontmatter.

Good fit Use it to dry-run an instruction, check whether it is likely to work, investigate a failed simulation, and review recent program logs before signing.

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Install with agentmods
npx agentmods add skills/berkayoztunc/orquestra/orquestra-simulator
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add berkayoztunc/orquestra --skill orquestra-simulator
Clone the repo
git clone --depth 1 https://github.com/berkayoztunc/orquestra

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for orquestra-simulator

README.md
[![agentmods](https://agentmods.dev/badge/skills/berkayoztunc/orquestra/orquestra-simulator/github.svg)](https://agentmods.dev/skills/berkayoztunc/orquestra/orquestra-simulator)
Your own site
<a href="https://agentmods.dev/skills/berkayoztunc/orquestra/orquestra-simulator"><img src="https://agentmods.dev/badge/skills/berkayoztunc/orquestra/orquestra-simulator/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for orquestra-simulator

Your own site · 80×15
<a href="https://agentmods.dev/skills/berkayoztunc/orquestra/orquestra-simulator"><img src="https://agentmods.dev/badge/skills/berkayoztunc/orquestra/orquestra-simulator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 77 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 411 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00077 $0.00411
Opus 5 $0.00039 $0.00205
Sonnet 5 $0.00015 $0.00082
Haiku 4.5 $0.00008 $0.00041

Measured 12d ago against content hash 85cecb8401a8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

orquestra-simulator scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

agents/skills/orquestra-simulator/SKILL.md · 43 lines

What it actually says

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
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 12d ago First seen · 43 lines · 77 tokens per session scan A 85cecb8401a8

Subscribe to this mod's changes

orquestra-simulator is a skill published in the GitHub repository berkayoztunc/orquestra (23 stars, last pushed 25d ago), licensed MIT. It adds 77 tokens to every session and 411 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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