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 skills/rand/cc-polymath/discover-engineeringnpx skills add rand/cc-polymath --skill discover-engineeringgit clone --depth 1 https://github.com/rand/cc-polymathWhat 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 | $0.00042 | $0.00638 |
| Opus 5 | $0.00021 | $0.00319 |
| Sonnet 5 | $0.00008 | $0.00128 |
| Haiku 4.5 | $0.00004 | $0.00064 |
Grade A, and why
discover-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 2d 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.
How it starts
The opening of the file, as written. The whole thing — 82 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Engineering Skills Discovery
Provides automatic access to comprehensive engineering skills.
When This Skill Activates
This skill auto-activates when you're working with:
- engineering practices
- code review
- documentation
- team collaboration
- technical leadership
- Process flows and flowcharts
- Sequence and interaction diagrams
- System architecture and C4 diagrams
- Database schemas and ER diagrams
- Class diagrams and state machines
- Data visualization charts
- Project timelines and Gantt charts
- Git workflows and branching
- Mindmaps and concept hierarchies
- Any Mermaid.js diagram creation
Available Skills
Quick Reference
The Engineering category contains 24 skills across 2 subcategories:
Engineering (16 skills):
Software Development Practices:
- code-review - PR reviews, feedback, automation
- code-quality - SOLID principles, metrics, code smells
- refactoring-patterns - Safe refactoring techniques
- test-driven-development - TDD, red-green-refactor
- domain-driven-design - DDD patterns, bounded contexts
- functional-programming - FP principles, immutability
- design-patterns - GoF patterns, when to use
- technical-debt - Identifying and managing debt
- pair-programming - Pairing techniques, mob programming
- continuous-integration - CI/CD pipelines, deployment
RFC & Documentation: 11. rfc-consensus-building - Stakeholder collaboration 12. rfc-decision-documentation - ADRs, decision tracking 13. rfc-structure-format - RFC templates, formatting 14. rfc-technical-design - Architecture proposals
Plus 2 more in ../engineering/INDEX.md
Diagrams (8 skills): See ../diagrams/INDEX.md
Load Full Category Details
Read ../engineering/INDEX.md Read ../diagrams/INDEX.md
Progressive Loading
This gateway skill enables progressive loading:
- Level 1: Gateway loads automatically (you're here now)
- Level 2: Load category INDEX.md for full overview
- Level 3: Load specific skills as needed
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.
- 2d ago First seen · 82 lines · 42 tokens per session scan A 216119fd8308
discover-engineering is a skill published in the GitHub repository rand/cc-polymath (136 stars, last pushed 6mo ago), licensed MIT. It adds 42 tokens to every session and 638 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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