symphony-setup

symphony-setup is a skill for Claude Code, Codex from odysseus0/symphony. It costs 79 tokens per session (2,145 once invoked), scanned C, original, from a forked repository, Apache-2.0.

A setup guide for Symphony, an OpenAI Codex orchestrator that turns Linear work tickets into pull requests through autonomous coding agents.

In plain words
What is it for?
Configuring Symphony for a repository, checking Codex, mise, GitHub, Linear, API-key, and clone-auth requirements, and getting the workflow ready.
Why use it?
It helps prepare the required tools, credentials, repository access, and Linear connection before agents can work unattended.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/odysseus0/symphony/symphony-setup
Any agent
npx skills add odysseus0/symphony --skill symphony-setup
Clone the repo
git clone --depth 1 https://github.com/odysseus0/symphony

Made for: Claude Code, Codex.

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 symphony-setup

README.md
[![agentmods](https://agentmods.dev/badge/skills/odysseus0/symphony/symphony-setup.svg)](https://agentmods.dev/skills/odysseus0/symphony/symphony-setup)
Your own site
<a href="https://agentmods.dev/skills/odysseus0/symphony/symphony-setup"><img src="https://agentmods.dev/badge/skills/odysseus0/symphony/symphony-setup.svg" alt="Measured on agentmods" height="20"></a>
Per session 79 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,145 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 2 findings. Scan, not verified.
Origin fork From a forked repository.
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 $0.00079 $0.02145
Opus 5 $0.00039 $0.01073
Sonnet 5 $0.00016 $0.00429
Haiku 4.5 $0.00008 $0.00215

Measured 3d ago against content hash e18f70cfef87, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade C, and why

symphony-setup scanned grade C with 2 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 3d 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.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

6. **Git clone auth** — the `after_create` hook runs `git clone` unattended. Verify the user's repo clone URL works non-interactively: `git clone --depth 1 <url> /tmp/test-clone && rm -rf /tmp/test-clone`. HTTPS with pas

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

After the user picks a project, use Linear MCP to check the team's workflow states. Three custom states are required. If any are missing, create them via `curl`:
.agents/skills/symphony-setup/SKILL.md · 199 lines

How it starts

The opening of the file, as written. The whole thing — 199 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Symphony Setup

Set up Symphony — OpenAI's orchestrator that turns Linear tickets into pull requests via autonomous Codex agents.

Preflight checks

Run these checks first and stop if any fail — resolve before continuing:

  1. codex — run codex --version. Must be installed and authenticated.
  2. mise — run mise --version. Needed for Elixir/Erlang version management.
  3. gh — run gh auth status. Must be installed AND authenticated. Agents use gh to create PRs and close orphaned PRs. Silent failure without it.
  4. LINEAR_API_KEY — run test -n "$LINEAR_API_KEY" && echo "set" || echo "missing". Must persist across sessions (shell config, not just export).
  5. Linear MCP — verify Linear MCP is available. If not, set it up:
    • Claude Code: claude mcp add --transport http linear https://mcp.linear.app/mcp
    • Codex: codex mcp add linear --url https://mcp.linear.app/mcp
    • Other clients: see Linear MCP docs
  6. Git clone auth — the after_create hook runs git clone unattended. Verify the user's repo clone URL works non-interactively: git clone --depth 1 <url> /tmp/test-clone && rm -rf /tmp/test-clone. HTTPS with password prompts will silently fail. Use SSH keys (no passphrase) or HTTPS with credential helper / token.

Report results to the user before proceeding.

Build Symphony

Use the fork — easier to get started with:

git clone https://github.com/odysseus0/symphony
cd symphony/elixir
mise trust && mise install
mise exec -- mix setup
mise exec -- mix build

Note: mise install downloads precompiled Erlang/Elixir if available for the platform. If not, it compiles from source — this can take 10-20 minutes. Let the user know before starting.

Prepare the user's repo

Auto-detect as much as possible. Only ask the user to confirm or fill gaps.

Auto-detect repo info

  • Repo pathgit rev-parse --show-toplevel from the current directory. If not in a git repo, ask.
  • Clone URLgit remote get-url origin. Verify it works non-interactively: git clone --depth 1 <url> /tmp/test-clone && rm -rf /tmp/test-clone.
  • Setup commands — infer from lockfiles/manifests. Confirm with the user.

Read the full file on GitHub · 199 lines

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. 3d ago First seen · 199 lines · 79 tokens per session scan C e18f70cfef87

Subscribe to this mod's changes

symphony-setup is a skill published in the GitHub repository odysseus0/symphony (82 stars, last pushed 5mo ago), licensed Apache-2.0. It adds 79 tokens to every session and 2,145 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it C with 2 findings (recursive force delete, makes network calls). It comes from a forked repository.

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