error-doctor

error-doctor is a skill for Claude Code, Codex from FeiZhuLulu/kimi-code-skills. It costs 30 tokens per session (2,280 once invoked), scanned A, original, MIT.

A structured troubleshooting method for terminal errors, failed builds and tests, runtime exceptions, dependency problems, and environment issues.

In plain words
What is it for?
Use it to diagnose a failure before changing code, verify the cause, and identify the smallest appropriate correction.
Why use it?
It turns a confusing error into likely causes, checks to confirm them, and a focused fix.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions subagents.

Good fit Use it to diagnose a failure before changing code, verify the cause, and identify the smallest appropriate correction.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/feizhululu/kimi-code-skills/error-doctor
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 FeiZhuLulu/kimi-code-skills --skill error-doctor
Clone the repo
git clone --depth 1 https://github.com/FeiZhuLulu/kimi-code-skills

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 error-doctor

README.md
[![agentmods](https://agentmods.dev/badge/skills/feizhululu/kimi-code-skills/error-doctor/github.svg)](https://agentmods.dev/skills/feizhululu/kimi-code-skills/error-doctor)
Your own site
<a href="https://agentmods.dev/skills/feizhululu/kimi-code-skills/error-doctor"><img src="https://agentmods.dev/badge/skills/feizhululu/kimi-code-skills/error-doctor/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 error-doctor

Your own site · 80×15
<a href="https://agentmods.dev/skills/feizhululu/kimi-code-skills/error-doctor"><img src="https://agentmods.dev/badge/skills/feizhululu/kimi-code-skills/error-doctor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 30 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,280 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00030 $0.02280
Opus 5 $0.00015 $0.01140
Sonnet 5 $0.00006 $0.00456
Haiku 4.5 $0.00003 $0.00228

Measured 10d ago against content hash 9f25eaa27dbb, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

error-doctor scanned grade A with 1 finding 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 10d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

Diagnosis: Check if the URL is reachable (`curl -I`), check DNS, check proxy settings.
error-doctor/SKILL.md · 239 lines

How it starts

The opening of the file, as written. The whole thing — 239 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Error Doctor — Structured Error Diagnosis

Purpose

Transform a confusing error message into: the key error, root cause hypotheses, verification steps, and a minimal fix. This skill diagnoses first, fixes second — it does not jump to editing code before understanding the problem.

Kimi Code Usage

Manual invocation:

/skill:error-doctor

This skill may be automatically invoked when the agent detects a failed Bash command, build error, or test failure.

Diagnosis Workflow

1. Locate the Error

Identify where the error came from:

Source How to get it
User pasted text Read directly from the conversation
Recent Bash output The last Bash tool execution with non-zero exit
Build log Look for the build command output in the conversation
Test output Look for the test command output in the conversation

If the output is long (> 50 lines), use Grep to find the key error:

Grep pattern: (?i)(error|fatal|panic|exception|traceback|failed|FAILED)

If the error comes from Kimi session or debug files (wire.jsonl, tasks/, exported debug zip), treat them as sensitive local data. Do not paste or summarize credential-like content. Redact paths, tokens, and command outputs that may contain secrets.

2. Extract the Key Error

From the error output, identify the primary error. Most tools emit a mix of warnings, info, and errors. Focus on:

  • The first error in a chain (subsequent errors are often cascading)
  • Lines with error, Error, ERROR, fatal, FATAL, panic
  • Lines with Exception, Traceback, FAILED
  • The exit code

Ignore:

  • Warnings that are not errors
  • Info lines
  • Decorative borders or formatting
  • Stack frames from node_modules, vendor directories, or standard libraries (focus on your own code)

3. Classify the Error

Route into one of these categories:

Syntax / Parse

Signals: SyntaxError, Unexpected token, Parse error, error: expected

Read the full file on GitHub · 239 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. 10d ago First seen · 239 lines · 30 tokens per session scan A 9f25eaa27dbb

Subscribe to this mod's changes

error-doctor is a skill published in the GitHub repository FeiZhuLulu/kimi-code-skills (5 stars, last pushed 2mo ago), licensed MIT. It adds 30 tokens to every session and 2,280 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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