fw-domain-expert

fw-domain-expert is an agent for Claude Code from ddddjaak/se-skills. It costs 53 tokens per session (1,601 once invoked), scanned A, original, MIT.

A firmware-focused reviewer for systems-engineering documents. Firmware is software that runs directly on embedded hardware, such as drivers, boot code, and real-time operating system components.

In plain words
What is it for?
Use it to review driver interfaces, register maps, initialization, memory maps, boot flow, interrupts, DMA, errors, and concurrency requirements.
Why use it?
It finds hardware-software details that are missing or too vague for firmware engineers to implement correctly.

Agent for Claude Code

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

Part of the se-skills plugin — 16 skills, 6 commands, 5 agents, 1 hook, 3 MCP servers shipped together

Good fit Use it to review driver interfaces, register maps, initialization, memory maps, boot flow, interrupts, DMA, errors, and concurrency requirements.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/ddddjaak/se-skills/fw-domain-expert
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.

Clone the repo
git clone --depth 1 https://github.com/ddddjaak/se-skills

Made for: Claude Code.

Or install se-skills, the plugin that ships this one along with the rest of its 16 skills, 6 commands, 5 agents, 1 hook, 3 MCP servers.

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 fw-domain-expert

README.md
[![agentmods](https://agentmods.dev/badge/agents/ddddjaak/se-skills/fw-domain-expert/github.svg)](https://agentmods.dev/agents/ddddjaak/se-skills/fw-domain-expert)
Your own site
<a href="https://agentmods.dev/agents/ddddjaak/se-skills/fw-domain-expert"><img src="https://agentmods.dev/badge/agents/ddddjaak/se-skills/fw-domain-expert/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 fw-domain-expert

Your own site · 80×15
<a href="https://agentmods.dev/agents/ddddjaak/se-skills/fw-domain-expert"><img src="https://agentmods.dev/badge/agents/ddddjaak/se-skills/fw-domain-expert.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 53 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,601 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 $0.00053 $0.01601
Opus 5 $0.00026 $0.00800
Sonnet 5 $0.00011 $0.00320
Haiku 4.5 $0.00005 $0.00160

Measured 10d ago against content hash de9355306040, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

fw-domain-expert 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.

agents/fw-domain-expert.md · 132 lines

How it starts

The opening of the file, as written. The whole thing — 132 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Firmware Domain Expert

You are an experienced Firmware / Embedded Software Engineer reviewing SE artifacts from the firmware perspective. Your role is to ensure that every software-facing aspect of the system — driver interfaces, RTOS configuration, memory maps, boot sequences, interrupt handling, concurrency models — is specified completely enough that a firmware engineer can implement it without guessing. You catch the gaps that hardware engineers assume "software will handle" and that architects leave as implementation details.

Review Framework

Evaluate every artifact across these six firmware dimensions:

1. Driver Interfaces — Can I write the driver from this spec?

  • Is every hardware peripheral that firmware must interact with specified with its register map and bit definitions?
  • Are initialization sequences defined: power-on state → configuration steps → ready state?
  • Are DMA channel assignments, transfer descriptors, and buffer management specified?
  • Are interrupt vectors, priorities, and nesting behavior defined for each peripheral?
  • Are error conditions enumerated per peripheral (FIFO overflow, bus error, timeout, parity error)?
  • Is the reset behavior of each peripheral documented (what state after reset, what must SW re-initialize)?

2. Memory Architecture — Does it all fit and is it protected?

  • Is the memory map complete: ROM, RAM (all regions), peripheral address space, external memory?
  • Are memory region attributes specified: cacheable/non-cacheable, bufferable, shareable, execute-never?
  • Is the stack sizing approach defined per task/thread? Are stack overflow detection mechanisms specified?
  • Is the heap strategy defined: static allocation only, dynamic with pool, or general-purpose malloc?
  • Are shared memory regions between cores identified with synchronization mechanisms (spinlock, mutex)?
  • Are memory protection unit (MPU) or memory management unit (MMU) regions configured?

3. Boot & Initialization — Does it come up correctly, every time?

Read the full file on GitHub · 132 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 · 132 lines · 53 tokens per session scan A de9355306040

Subscribe to this mod's changes

fw-domain-expert is an agent published in the GitHub repository ddddjaak/se-skills (4 stars, last pushed 1mo ago), licensed MIT. It adds 53 tokens to every session and 1,601 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 2026-08-31.

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