senior-engineer

senior-engineer is a skill for Claude Code from Jaan-Mustafa/10x-Team. It costs 35 tokens per session (1,666 once invoked), scanned A, original, MIT.

A set of guidelines for making implementation decisions, reviewing code, debugging difficult problems, and mentoring developers. It requires first reading the relevant code and understanding the problem before recommending a solution.

In plain words
What is it for?
Use it for code reviews, bug fixes, refactors, design decisions, edge-case analysis, and production-quality implementation guidance.
Why use it?
It helps prevent fixes and design choices based on guesses about code that has not been examined.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the 10x-Team plugin — 13 skills, 2 commands shipped together

Good fit Use it for code reviews, bug fixes, refactors, design decisions, edge-case analysis, and production-quality implementation guidance.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/jaan-mustafa/10x-team/senior-engineer
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 Jaan-Mustafa/10x-Team --skill senior-engineer
Clone the repo
git clone --depth 1 https://github.com/Jaan-Mustafa/10x-Team

Made for: Claude Code.

Or install 10x-Team, the plugin that ships this one along with the rest of its 13 skills, 2 commands.

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 senior-engineer

README.md
[![agentmods](https://agentmods.dev/badge/skills/jaan-mustafa/10x-team/senior-engineer/github.svg)](https://agentmods.dev/skills/jaan-mustafa/10x-team/senior-engineer)
Your own site
<a href="https://agentmods.dev/skills/jaan-mustafa/10x-team/senior-engineer"><img src="https://agentmods.dev/badge/skills/jaan-mustafa/10x-team/senior-engineer/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 senior-engineer

Your own site · 80×15
<a href="https://agentmods.dev/skills/jaan-mustafa/10x-team/senior-engineer"><img src="https://agentmods.dev/badge/skills/jaan-mustafa/10x-team/senior-engineer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 35 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,666 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.
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 $0.00035 $0.01666
Opus 5 $0.00017 $0.00833
Sonnet 5 $0.00007 $0.00333
Haiku 4.5 $0.00003 $0.00167

Measured 10d ago against content hash 4c2b616a2672, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

senior-engineer 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 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.

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/senior-engineer/SKILL.md · 151 lines

How it starts

The opening of the file, as written. The whole thing — 151 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Senior Engineer

Help with implementation decisions, code review, and hands-on engineering guidance through structured analysis.

Start by understanding the codebase and the specific problem, then ask questions one at a time to clarify context. Once you understand what's needed, provide clear, actionable implementation guidance.

Anti-Pattern: "I Know the Fix Without Looking"

Every implementation task goes through this process. A bug fix, a feature addition, a refactor — all of them. Jumping to a solution without understanding the code and context leads to fixes that break other things. The review can be quick, but you MUST read the code first.

Checklist

You MUST complete these steps in order:

  1. Read the relevant code — understand the current implementation, patterns, dependencies
  2. Understand the problem — what's broken or needed, what's the expected behavior
  3. Ask clarifying questions — one at a time, understand edge cases, constraints, test expectations
  4. Evaluate approaches — propose 2-3 implementation options with trade-offs
  5. Present recommendation — clear implementation plan with rationale
  6. Consider edge cases — error handling, boundary conditions, backward compatibility
  7. Define testing strategy — what to test, how to verify the change works

Process Flow

Read relevant code
        │
        v
Understand the problem
        │
        v
Ask clarifying questions (one at a time)
        │
        v
Evaluate 2-3 implementation approaches
        │
        v
Present recommendation
        │
        v
User aligned? ──no──> Revise
        │
       yes
        │
        v
Implement with tests

Read the full file on GitHub · 151 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 · 151 lines · 35 tokens per session scan A 4c2b616a2672

Subscribe to this mod's changes

senior-engineer is a skill published in the GitHub repository Jaan-Mustafa/10x-Team (11 stars, last pushed 2mo ago), licensed MIT. It adds 35 tokens to every session and 1,666 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.

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