debug

A troubleshooting workflow for diagnosing stated faults or startup and performance regressions in code, JAX, Marin, Iris, Zephyr, or TPU systems.

In plain words
What is it for?
Use it for stuck jobs, scheduling failures, resource leaks, slow pipelines, worker failures, and TPU errors such as missing or busy accelerators.
Why use it?
It directs the investigation toward the relevant repository guidance and operating procedures instead of treating ordinary implementation work as a fault.

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/marin-community/marin/debug
Any agent
npx skills add marin-community/marin --skill debug
Clone the repo
git clone --depth 1 https://github.com/marin-community/marin

Made for: Claude Code, Codex.

Per session 39 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 412 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00039 $0.00412
Opus 5 $0.00019 $0.00206
Sonnet 5 $0.00008 $0.00082
Haiku 4.5 $0.00004 $0.00041

Measured 2d ago against content hash 7674bbf6a621, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

debug 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 2d 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/debug/SKILL.md · 35 lines

What it actually says

Debug

Keep working notes in the active task. Do not add repository debug-log files. Use consult-echo when repository policy requires prior-work search. After every incident handled by this workflow, use write-ops-log to publish its standalone Echo record and link it from the associated PR or issue.

Infrastructure faults

Read lib/iris/AGENTS.md or lib/zephyr/AGENTS.md for context, then follow the matching OPS.md section:

Symptom Read
Stuck job, scheduling failure, resource leak, controller stalled lib/iris/OPS.md → SQL Queries, Process Inspection & Profiling, Known Bugs, Troubleshooting
Iris task misbehaving, container inspection, profiling a running task lib/iris/OPS.md → Task Operations, Process Inspection & Profiling
Zephyr pipeline slow / stragglers / data skew / worker failures lib/zephyr/OPS.md → Diagnostic Patterns, Observability
TPU bad node (No accelerator found, FAILED_PRECONDITION, Device or resource busy) lib/iris/OPS.md → TPU Bad-Node Recovery

Read the guardrails beside the commands. Never modify the controller database, prefer iris process profile over SSH, and never run a full iris cluster restart without approval. After a TPU recovery or Zephyr fix, return to the active Iris job-monitoring or babysit-zephyr loop.

Code bugs

For code bugs, reproduce the failure, identify the smallest falsifiable hypothesis, change one cause at a time, and test the behavior that failed. Let exceptions propagate unless added context changes the diagnosis.

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. 2d ago First seen · 35 lines · 39 tokens per session scan A 7674bbf6a621

Subscribe to this mod's changes

debug is a skill published in the GitHub repository marin-community/marin (3,212 stars, last pushed today), licensed Apache-2.0. It adds 39 tokens to every session and 412 once invoked, about $0.0002 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.

Related

Other skills, from other repositories

systematic-debugging

Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes.

obra/superpowers · 21 tokens

chat-pet-sprite-creation

Use when creating or changing VS Code chat pet sprite art, sprite sheets, state animations, eye treatments, Stable/Insiders variants, or pet transitions under src/vs/workbench/contrib/chat/browser/widget/media/chatPet.

microsoft/vscode · 53 tokens

cpu-profile-analysis

Analyze V8/Chrome CPU profiles (.cpuprofile) and DevTools trace files (Trace-.json). Use when: profiling performance, investigating slow functions, comparing code paths, finding bottlenecks, analyzing timeToRequest, understanding call trees from sampling profiler data, analyzing layout/paint/rendering, investigating…

microsoft/vscode · 71 tokens

babysit-pr

Babysit a GitHub pull request after creation by continuously polling review comments, CI checks/workflow runs, and mergeability state until the PR is merged/closed or user help is required. Diagnose failures, retry likely flaky failures up to 3 times, auto-fix/push branch-related issues when appropriate, and keep…

openai/codex · 114 tokens

imagegen

Generate or edit raster images when the task benefits from AI-created bitmap visuals such as photos, illustrations, textures, sprites, mockups, or transparent-background cutouts. Use when Codex should create a brand-new image, transform an existing image, or derive visual variants from references, and the output…

openai/codex · 113 tokens

agent-host-chat-contributions

Build and review cross-cutting agent-host chat behavior through lifecycle contributions. Use when adding turn lifecycle side effects, prompt or context injection, restored-history transformation, protocol-action observation, or when reviewing changes that add code to AgentSideEffects or AgentService.

microsoft/vscode · 56 tokens