buildkite-mcp-debugging

buildkite-mcp-debugging is a skill for Claude Code, Codex from hasithaishere/buildkite-developer-toolkit. It costs 96 tokens per session (1,033 once invoked), scanned A, original, MIT.

A guide for investigating Buildkite, a service that runs automated software builds and tests. It uses Buildkite’s MCP server and current documentation to inspect builds, logs, pipelines, agents, and related details.

In plain words
What is it for?
Use it to investigate failed builds, fetch logs and annotations, list pipelines or agents, and check current Buildkite syntax and behavior.
Why use it?
It helps identify why a build or step failed without relying on outdated Buildkite instructions or incomplete logs.

Skill for Claude CodeCodex

Part of the buildkite-developer-toolkit plugin — 7 skills shipped together

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/hasithaishere/buildkite-developer-toolkit/buildkite-mcp-debugging
Any agent
npx skills add hasithaishere/buildkite-developer-toolkit --skill buildkite-mcp-debugging
Clone the repo
git clone --depth 1 https://github.com/hasithaishere/buildkite-developer-toolkit

Made for: Claude Code, Codex.

Or install buildkite-developer-toolkit, the plugin that ships this one along with the rest of its 7 skills.

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 buildkite-mcp-debugging

README.md
[![agentmods](https://agentmods.dev/badge/skills/hasithaishere/buildkite-developer-toolkit/buildkite-mcp-debugging.svg)](https://agentmods.dev/skills/hasithaishere/buildkite-developer-toolkit/buildkite-mcp-debugging)
Your own site
<a href="https://agentmods.dev/skills/hasithaishere/buildkite-developer-toolkit/buildkite-mcp-debugging"><img src="https://agentmods.dev/badge/skills/hasithaishere/buildkite-developer-toolkit/buildkite-mcp-debugging.svg" alt="Measured on agentmods" height="20"></a>
Per session 96 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,033 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 $0.00096 $0.01033
Opus 5 $0.00048 $0.00517
Sonnet 5 $0.00019 $0.00207
Haiku 4.5 $0.00010 $0.00103

Measured 4d ago against content hash 17059dd22296, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

buildkite-mcp-debugging 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 4d 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.

skills/buildkite-mcp-debugging/SKILL.md · 87 lines

How it starts

The opening of the file, as written. The whole thing — 87 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Buildkite live debugging & real-time accuracy

This skill does two things: inspect real builds via the Buildkite MCP server, and keep answers accurate by checking the live documentation.

References (verify here):

A. Debugging with the Buildkite MCP server

The MCP server exposes Buildkite read/write operations as tools. It is not bundled in this plugin (so you never ship credentials); the user adds it once.

One-time setup (user runs this)

# Full access:
claude mcp add --transport http buildkite https://mcp.buildkite.com/mcp

# Read-only (recommended for debugging — can't mutate anything):
claude mcp add --transport http buildkite-ro https://mcp.buildkite.com/mcp/readonly \
  --header "X-Buildkite-Toolsets: user,pipelines,builds,agents"

The remote server authenticates via Buildkite's OAuth flow on first use. See the README "Connecting the Buildkite MCP server" section.

Using it

Once connected, MCP tools appear (typically prefixed mcp__buildkite__*). If you don't see them, use ToolSearch to load them. Toolsets group the tools:

  • user — who am I / which org (validate the token first).
  • pipelines — list/get pipelines (and create/update with write access).
  • builds — list/get builds, get a build's jobs, fetch logs, wait for builds.
  • agents — which agents are connected and their state.

Debugging workflow

  1. Confirm access: call the user/token tool to verify org + scope.
  2. Locate the build: list builds for the pipeline (filter by branch/state), or get a specific build by number.
  3. Find the failing job/step: get the build's jobs; identify the non-zero / failed one and which hook or command it was.
  4. Read the log: fetch that job's log. Look for: the failing command, the last hook that ran, set -e aborts, missing env vars, and any +++/^^^ Buildkite log group markers near the failure.
  5. Correlate to code: map the failure to the pipeline step or plugin hook. For plugin issues, hand off to buildkite-plugin-dev; for pipeline structure, to pipeline-architecture (and validate fixes with --dry-run).
  6. Propose a fix and, if the user wants, re-run via the MCP write tools.

Read the full file on GitHub · 87 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. 4d ago First seen · 87 lines · 96 tokens per session scan A 17059dd22296

Subscribe to this mod's changes

buildkite-mcp-debugging is a skill published in the GitHub repository hasithaishere/buildkite-developer-toolkit (2 stars, last pushed 1mo ago), licensed MIT. It adds 96 tokens to every session and 1,033 once invoked, about $0.0005 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 2026-08-31.

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