Borrowing it
Nothing to install: this file belongs to iammrduncan/fxbot. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/iammrduncan/fxbot/main/.agents/skills/engineering/SKILL.mdgit clone --depth 1 https://github.com/iammrduncan/fxbotWrote 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.
[](https://agentmods.dev/skills/iammrduncan/fxbot/engineering)<a href="https://agentmods.dev/skills/iammrduncan/fxbot/engineering"><img src="https://agentmods.dev/badge/skills/iammrduncan/fxbot/engineering/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.
<a href="https://agentmods.dev/skills/iammrduncan/fxbot/engineering"><img src="https://agentmods.dev/badge/skills/iammrduncan/fxbot/engineering.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00069 | $0.01203 |
| Opus 5.5 | $0.00028 | $0.00481 |
| Sonnet 5.5 | $0.00014 | $0.00241 |
| Haiku 4.5 | $0.00007 | $0.00120 |
Grade A, and why
engineering 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 yesterday.
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.
How it starts
The opening of the file, as written. The whole thing — 93 lines — stays where its author put it; the contents beside it link to each section on GitHub.
The sidekick
A colleague you hand something to for an honest read. It reviews engineering work and derives repository instructions from evidence.
The value is in pushing back. A sidekick that agrees with you is worth nothing — but so is one that always finds something. Both are failures of the same kind: an answer decided before the work was looked at.
The rules that govern every command
Review by default. Only generate-agent-instructions writes files, and only on an explicit
request to create or update repository instructions. Every other command is read-only, including
when a correction looks obvious. Generation does not authorize code, CI, dependency, or policy changes.
Preserve scope and owner choices. Discover parent and nested instructions. Keep their scope, explicit decisions, stable rule IDs, and generated blocks intact. Report unresolved conflicts rather than choosing a new policy for the owner. Do not overwrite concurrent changes.
Say when you do not know. GOOD_ENGINEERING_H.md makes this
a principle, and it is the one most often broken by sounding confident instead. An honest "I cannot
tell without X" is worth more than a graded opinion.
Understand before judging. The ladder in reference/ladder.md runs after you understand the problem, never instead of it. A verdict on code you have not traced is noise dressed as judgement.
Setup
Resolve this installed skill's directory from the loaded SKILL.md location. Resolve its references
relative to that directory; keep the working directory at the user's target project. Load the one
command playbook needed. No source checkout or sibling skill is required for instruction work.
Commands
| Command | Purpose | Writes |
|---|---|---|
gut-check [thing] |
Fast read on an approach before it is built | no |
talk-it-out [problem] |
Rounds of questions until the problem is actually stated, then stop | no |
plan-it [work] |
Engineering judgement over a plan; hands the shape to the objectives skill | no |
grill-it [target] |
Adversarial review of something that exists. Our review and audit | no |
audit-agent-instructions [target] |
Inventory instructions, verify claims, and report conflicts | no |
generate-agent-instructions [target] |
Derive or update repository instructions from evidence | yes, explicit request |
What ships with it
11 files 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.
- agents/openai.yaml 218 B
- reference/audit-agent-instructions.md 2.5 KB
- reference/generate-agent-instructions.md 4.1 KB
- reference/GOOD_ENGINEERING_H.md 9.1 KB
- reference/grill-it.md 3.4 KB
- reference/gut-check.md 2.3 KB
- reference/ladder.md 3.8 KB
- reference/plan-it.md 2.7 KB
- reference/provenance.md 2.2 KB
- reference/style-sources.md 3.1 KB
- reference/talk-it-out.md 4.2 KB
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.
- yesterday First seen · 93 lines · 69 tokens per session scan A 7166eeba272f
engineering is a skill published in the GitHub repository iammrduncan/fxbot (11 stars, last pushed yesterday), licensed Apache-2.0. It adds 69 tokens to every session and 1,203 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-11-06.
engineering compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| engineeringiammrduncan/fxbot | Skill | 11 | yesterday | Apache-2.0 | A | 69 | Codex |
| C31-reviewChianW/C31 | Skill | 1 | 2mo ago | MIT | A | 32 | Claude Code, Codex |
| C31-multi-reviewChianW/C31 | Skill | 1 | 2mo ago | MIT | A | 34 | Claude Code, Codex |
| C31-review-securityChianW/C31 | Skill | 1 | 2mo ago | MIT | A | 67 | Claude Code, Codex |
| c31-improve-codebase-architectureChianW/C31 | Skill | 1 | 2mo ago | MIT | A | 64 | Claude Code, Codex |
| C31-review-adversarialChianW/C31 | Skill | 1 | 2mo ago | MIT | A | 0 | Claude Code, Codex |
| C31-review-architectureChianW/C31 | Skill | 1 | 2mo ago | MIT | A | 0 | Claude Code, Codex |