vibe-seller: Skill for Claude Code

.claude/skills/debug-ci/SKILL.md

debug-ci is a skill for Claude Code from zpoint/vibe-seller. It costs 25 tokens per session (2,446 once invoked), scanned A, original, Apache-2.0.

A skill for investigating continuous-integration failures, where automated checks run on code changes. It examines build logs, test code, and the agent's reasoning to identify the underlying cause.

In plain words
What is it for?
Downloading CI artifact logs, tracing failures through tests and agent behaviour, and fixing root causes rather than hiding them with retries or looser checks.
Why use it?
It helps separate the real defect in code, configuration, or design from the visible test failure.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

This is zpoint/vibe-seller's own configuration. It tells Claude Code how to work on vibe-seller itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything vibe-seller configures →

Not installable: its command points at a path on the author’s own machine, so it runs nowhere else. The line is /home/runner/actions-runner/_work/$REPO/$REPO/logs/backend_7777.log.

Reuse

Borrowing it

Nothing to install: this file belongs to zpoint/vibe-seller. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/zpoint/vibe-seller/main/.claude/skills/debug-ci/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/zpoint/vibe-seller

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 debug-ci

README.md
[![agentmods](https://agentmods.dev/badge/skills/zpoint/vibe-seller/debug-ci.svg)](https://agentmods.dev/skills/zpoint/vibe-seller/debug-ci)
Your own site
<a href="https://agentmods.dev/skills/zpoint/vibe-seller/debug-ci"><img src="https://agentmods.dev/badge/skills/zpoint/vibe-seller/debug-ci.svg" alt="Measured on agentmods" height="20"></a>
Per session 25 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,446 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 5.1 $0.00025 $0.02446
Opus 5 $0.00013 $0.01223
Sonnet 5 $0.00005 $0.00489
Haiku 4.5 $0.00003 $0.00245

Measured 6d ago against content hash c5d9056a4561, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

debug-ci 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 6d 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.

.claude/skills/debug-ci/SKILL.md · 240 lines

How it starts

The opening of the file, as written. The whole thing — 240 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CI Debug

Debug CI test failures by analyzing artifact logs, test code, and agent behavior.

Core Principle

We own the project, not just the PR.

Every CI failure has a root cause in code, config, or design — not in "flakiness." Even if a failure predates your current changes, you are responsible for finding the root cause and fixing it. Never dismiss a failure as "unrelated to this PR" or "intermittent" — those are descriptions of symptoms, not conclusions. The conclusion is the root cause and the fix.

Workarounds like increasing timeouts, adding retries, or loosening assertions are NOT acceptable. These mask the real problem. Find and fix the design flaw that the test exposed.

Fix from design, not from symptom

Before writing any fix, review the design that produced the bug. A failing test is one observation of a design that allowed a failure to be possible. Patching the observation doesn't change what's possible — only changing the design does.

Ask in this order, every time:

  1. What contract was violated? Which invariant did the failure prove was unenforced? E.g., "the agent's email_watermark value must be a recent epoch" was an assumption, not an invariant, so the agent's wrong value was accepted.
  2. Where does the design make the bug possible? Find the surface that lets a wrong value through — usually a missing guard, a non-deterministic input, or a contract expressed only in prose.
  3. Move the contract into code. The fix should make the bug class impossible to recreate from this surface, not just unlikely. Server-side validation, typed APIs, ownership invariants, single coroutine ordering — these are design fixes. Retries, sleeps, and "let's just hope the model gets it right next time" are not.
  4. Only after the design fix, ask: are tests pinning this invariant now? If not, add them. The test is the second line of defence, not the fix itself.

Symptoms that mean you skipped the design pass and went straight to a workaround:

Read the full file on GitHub · 240 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. 6d ago First seen · 240 lines · 25 tokens per session scan A c5d9056a4561

Subscribe to this mod's changes

debug-ci is a skill published in the GitHub repository zpoint/vibe-seller (62 stars, last pushed 12d ago), licensed Apache-2.0. It adds 25 tokens to every session and 2,446 once invoked, about $0.0001 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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