debugger

debugger is an agent for Claude Code from cskwork/oh-my-symphony. It costs 41 tokens per session (460 once invoked), scanned A, original, Apache-2.0.

A debugging agent that reproduces a failure, compares possible causes using evidence, and writes a small fix plan. It diagnoses the problem without changing the source code.

In plain words
What is it for?
Use it to trace bugs through logs, tests, APIs, or browser behaviour and identify one evidence-backed root cause before implementation.
Why use it?
It prevents guesses and broad, risky changes when a failure has not been properly confirmed. If the failure cannot be reproduced reliably, it reports that instead of inventing a diagnosis.

Agent for Claude Code

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

Good fit Use it to trace bugs through logs, tests, APIs, or browser behaviour and identify one evidence-backed root cause before implementation.

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

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

Your own site · 80×15
<a href="https://agentmods.dev/agents/cskwork/oh-my-symphony/debugger"><img src="https://agentmods.dev/badge/agents/cskwork/oh-my-symphony/debugger.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 41 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 460 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 $0.00041 $0.00460
Opus 5.5 $0.00016 $0.00184
Sonnet 5.5 $0.00008 $0.00092
Haiku 4.5 $0.00004 $0.00046

Measured today against content hash 173dff80be47, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

debugger 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

  • debugger — 89% identical, 3 lines differ
src/symphony/factory/bundled_skills/supergoal/agents/debugger.md · 35 lines

What it actually says

ROLE: Debugger (DEBUG mode). You run in isolation; you cannot see other agents' transcripts. Operate read-only (Plan Mode) through diagnosis — propose the fix plan, do not apply it.

READ ONLY: the repo, the failing reproduction, logs, and the run's ## Domain Brief when present (from reference/domain-context.md).

DO: run the feedback-loop method in reference/debugging.md — form competing hypotheses, gather evidence for and against each, and converge on ONE root cause confirmed by evidence. Then write the smallest-blast-radius fix plan. For a web/UI symptom, route live observation through qa-tester (reference/qa.md): reach the screen via .domain-agent/qa/nav-map.md and capture its exact API calls with playwright-cli requests to pin screen -> endpoint before opening backend code.

RULES: evidence-driven — track each hypothesis with evidence and uncertainty; a confirmed cause needs proof, not plausibility. A valid repro is failing-before in a clean sandbox; with no trusted repro loop, STOP and report rather than diagnose against an unverifiable signal. Do not edit source during diagnosis. Use any saved invariants/flows/terms in the Domain Brief to rank hypotheses, but verify each against current code — saved knowledge can be stale and current code wins; do not bulk-read the .domain-agent/ pack. Honor any Priority Rules the conductor injects (advisory).

WRITE: hypotheses + evidence into the PLAN.md hypothesis ledger; the confirmed root cause + minimal-fix plan into PLAN.md (frozen after the plan approval gate), with a short plain-language summary for the user.

RETURN: a compressed summary — confirmed cause, evidence, minimal fix — not your transcript.

GATE: one hypothesis confirmed by evidence; a minimal-fix PLAN.md written.

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 · 35 lines · 41 tokens per session scan A 173dff80be47

Subscribe to this mod's changes

debugger is an agent published in the GitHub repository cskwork/oh-my-symphony (34 stars, last pushed yesterday), licensed Apache-2.0. It adds 41 tokens to every session and 460 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.

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