circleci-builds

circleci-builds is a skill for Claude Code, Codex from fanfan-de/anybox. It costs 55 tokens per session (480 once invoked), scanned A, original, MIT.

A workflow for investigating failed CircleCI builds. CircleCI is a service that automatically runs a project’s tests and build steps when code changes.

In plain words
What is it for?
Use it to inspect failed jobs, identify root causes, fix build or test configuration, handle dependency or environment issues, and assess flaky or transient failures.
Why use it?
It helps separate real code or configuration failures from temporary problems, then focuses attention on the first meaningful error instead of later cascading failures.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to inspect failed jobs, identify root causes, fix build or test configuration, handle dependency or environment issues, and assess flaky or transient failures.

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Install with agentmods
npx agentmods add skills/fanfan-de/anybox/builds
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.

Any agent
npx skills add fanfan-de/anybox --skill builds
Clone the repo
git clone --depth 1 https://github.com/fanfan-de/anybox

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 circleci-builds

README.md
[![agentmods](https://agentmods.dev/badge/skills/fanfan-de/anybox/builds/github.svg)](https://agentmods.dev/skills/fanfan-de/anybox/builds)
Your own site
<a href="https://agentmods.dev/skills/fanfan-de/anybox/builds"><img src="https://agentmods.dev/badge/skills/fanfan-de/anybox/builds/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 circleci-builds

Your own site · 80×15
<a href="https://agentmods.dev/skills/fanfan-de/anybox/builds"><img src="https://agentmods.dev/badge/skills/fanfan-de/anybox/builds.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 55 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 480 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00055 $0.00480
Opus 5 $0.00028 $0.00240
Sonnet 5 $0.00011 $0.00096
Haiku 4.5 $0.00006 $0.00048

Measured 9d ago against content hash cc46ce138f51, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

circleci-builds 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 9d 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.

plugins/Anybox-Plugins/circleci/skills/builds/SKILL.md · 58 lines

How it starts

The opening of the file, as written. The whole thing — 58 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CircleCI Builds

Overview

Use this skill to turn failing CircleCI pipelines into actionable fixes with clear evidence. Prioritize fast root-cause isolation, minimal safe patches, and explicit validation criteria.

Read references/transient-vs-deterministic.md when deciding whether a failure should be fixed in code/config, retried, mitigated with rerun behavior, or reported as external/transient. Read ../config/references/test-results-and-splitting.md when the failure involves missing test metadata, flaky test reruns, test splitting, or JUnit XML setup.

Inputs To Gather

  • Failing pipeline/workflow/job identifier
  • Branch and commit SHA
  • First failing step and key log lines
  • Whether rerun on same commit reproduces failure

Workflow

  1. Identify the primary failing signal.
    • Record the first failing job and step, not every downstream failure.
  2. Classify issue type.
    • Config syntax/reference issue
    • Environment/toolchain mismatch
    • Dependency/cache issue
    • Test or build regression
    • External/transient failure
  3. Apply the smallest viable fix.
    • Patch only files tied to confirmed root cause.
    • Keep workaround scope narrow.
  4. Validate.
    • Run highest-signal local checks when possible.
    • Define expected CircleCI success signals for the rerun.
  5. Report residual risk.
    • Call out unverified assumptions and likely follow-up checks.

Guardrails

  • Do not hide deterministic failures with blanket retries.
  • Avoid mixing unrelated refactors into incident fixes.
  • Treat external service outages as report-and-mitigate unless user asks for deeper redesign.
  • Keep confidence levels explicit when logs are incomplete.
  • Do not recommend automatic reruns or flaky-test workflows until the failure is classified as plausibly transient.

Output Contract

Provide:

  1. Failure summary (pipeline/workflow/job/step).
  2. Root-cause hypothesis with confidence.
  3. Applied changes with file list.
  4. Validation plan and expected pass signal.
  5. Remaining risk.

Read the full file on GitHub · 58 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 9d ago First seen · 58 lines · 55 tokens per session scan A cc46ce138f51

Subscribe to this mod's changes

circleci-builds is a skill published in the GitHub repository fanfan-de/anybox (57 stars, last pushed 26d ago), licensed MIT. It adds 55 tokens to every session and 480 once invoked, about $0.0003 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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