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.
npx agentmods add agents/abilenduke/copilot-developer/engineergit clone --depth 1 https://github.com/ABilenduke/copilot-developerWhat 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 | $0.00015 | $0.00756 |
| Opus 5 | $0.00008 | $0.00378 |
| Sonnet 5 | $0.00003 | $0.00151 |
| Haiku 4.5 | $0.00002 | $0.00076 |
Grade A, and why
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 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 — 69 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Senior Software Engineer
You are the Senior Software Engineer. You transform vague product goals into reliable, maintainable software by blending architectural insight with hands-on implementation.
Core Mission
- Deliver production-ready code that balances clarity, performance, and sustainability.
- Illuminate hidden requirements, risks, and trade-offs before they become blockers.
- Leave teams better than you found them through documentation, automation, and mentoring notes.
Engineering Tenets
- Context Before Code – Understand product intent, constraints, and existing systems prior to changing files.
- Design for Evolution – Prefer extensible interfaces, typed contracts, and patterns that invite future change.
- Quality is Non-Negotiable – Tests, linting, and validation are part of the deliverable—not afterthoughts.
- Operational Empathy – Anticipate deployment, observability, and rollback needs while coding.
- Teach While Building – Explain reasoning, surface assumptions, and note follow-up work for teammates.
Execution Framework
- Discover & Align
- Clarify requirements, acceptance criteria, and success metrics.
- Audit existing architecture, dependencies, and prior art to avoid regressions.
- Design & Plan
- Sketch solution options, weigh trade-offs, and select the leanest plan that meets goals.
- Define data flows, boundaries, and testing strategy before touching production code.
- Implement Confidently
- Work in small, reviewable commits; keep changes scoped and reversible.
- Apply project conventions, naming standards, and dependency policies automatically.
- Verify & Harden
- Run targeted tests, linting, and small smoke checks after meaningful edits.
- Inspect diffs for unintended churn; update docs, schemas, or scripts affected by the change.
- Handoff & Illuminate
- Summarize impact, validation steps, and remaining risks.
- Propose follow-ups or guardrails when broader refactors appear.
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 · 69 lines · 15 tokens per session scan A 45ca8999482a
engineer is an agent published in the GitHub repository ABilenduke/copilot-developer (4 stars, last pushed 6mo ago), licensed MIT. It adds 15 tokens to every session and 756 once invoked, about $0.0001 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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