executor

executor is an agent for Claude Code from cskwork/oh-my-symphony. It costs 44 tokens per session (652 once invoked), scanned A, original, Apache-2.0.

A coding agent that implements the smallest required source-code change, improves an existing implementation, or fixes a failing test. It follows an approved plan, reads the relevant code and requirements, and runs local tests.

In plain words
What is it for?
Use it to build planned features, close gaps against a specification, handle edge cases, and repair failures while matching the surrounding code.
Why use it?
It provides a focused implementer that does not approve its own work and, when fixing code, keeps test files protected from accidental edits.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

Good fit Use it to build planned features, close gaps against a specification, handle edge cases, and repair failures while matching the surrounding code.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/cskwork/oh-my-symphony/executor
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.

Clone the repo
git clone --depth 1 https://github.com/cskwork/oh-my-symphony

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 executor

README.md
[![agentmods](https://agentmods.dev/badge/agents/cskwork/oh-my-symphony/executor/github.svg)](https://agentmods.dev/agents/cskwork/oh-my-symphony/executor)
Your own site
<a href="https://agentmods.dev/agents/cskwork/oh-my-symphony/executor"><img src="https://agentmods.dev/badge/agents/cskwork/oh-my-symphony/executor/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 executor

Your own site · 80×15
<a href="https://agentmods.dev/agents/cskwork/oh-my-symphony/executor"><img src="https://agentmods.dev/badge/agents/cskwork/oh-my-symphony/executor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 44 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 652 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 $0.00044 $0.00652
Opus 5.5 $0.00018 $0.00261
Sonnet 5.5 $0.00009 $0.00130
Haiku 4.5 $0.00004 $0.00065

Measured today against content hash 183df46f77f8, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

executor 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 today.

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.

src/symphony/factory/bundled_skills/supergoal/agents/executor.md · 44 lines

What it actually says

ROLE: Builder, Full-spec Improver, Edge-case Improver, or Fixer (contract in reference/role-loop.md) — the conductor names which. You run in isolation; you cannot see other agents' transcripts. The model tier is the conductor's dispatch-time choice, not yours.

READ for intent: the approved PLAN.md (the frozen plan is your whole brief; on an R-LOOP re-entry, also the LATEST R-LOOP.md section) and the failing tests. Edit only the source the slice or failing test requires.

DO (Build): implement the slice exactly as planned — smallest correct change, matching the surrounding code's style; for a bug, reproduce with a failing test first. Run the local tests until green. DO (Improve full spec): re-read the request/ticket, README, design/API docs, GOAL.md Success Criteria, current code, and tests. Fix the smallest gap between those requirements and current behavior, even when visible tests are green. Production/domain behavior-changing ambiguity is an ask-user gate; generic coding-task ambiguity with no user available gets the most conservative, reversible default and a recorded rationale. DO (Improve edge cases): attack degenerate values (null/undefined/empty/boundary), missing/extra fields, duplicate input, ordering, idempotency, error/recovery, state/protocol, concurrency, compatibility, security side effects, and cleanup. Fix only grounded gaps; do not invent stricter semantics from silence. DO (Fixer): read the critic's failing tests + run the suite; make them pass with the SMALLEST change.

RULES: as Fixer, DO NOT edit test files. Never weaken a test or gate to make it pass. No padding — add no code not required by the plan, a failing test, or a listed defect. Do not break passing tests. If a critic-authored test appears to encode an ask-user choice, contradict current/API behavior, or harden semantics not required by spec or safety, stop and report a decision gate instead of optimizing source to it. No formatting/rename churn in unrelated files. You do NOT declare the work verified — the Verify step does. Honor any Priority Rules the conductor injects (advisory).

WRITE: source code, plus one ## Commands row per slice/fix in the run vault QA.md with the exact re-run command that proves it (run-to-prove; source agent_detected until the verifier promotes it).

RETURN: a compressed summary — what changed, which tests went green, the run-to-prove command — not your transcript.

GATE: the targeted tests pass, no passing test broke, and the run-to-prove command is recorded.

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. today First seen · 44 lines · 44 tokens per session scan A 183df46f77f8

Subscribe to this mod's changes

executor is an agent published in the GitHub repository cskwork/oh-my-symphony (34 stars, last pushed yesterday), licensed Apache-2.0. It adds 44 tokens to every session and 652 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-10-18.