Borrowing it
Nothing to install: this file belongs to irahardianto/rugged-gemini. 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/irahardianto/rugged-gemini/main/.gemini/skills/configuration-management-principles/SKILL.mdgit clone --depth 1 https://github.com/irahardianto/rugged-geminiWrote 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/irahardianto/rugged-gemini/configuration-management-principles)<a href="https://agentmods.dev/skills/irahardianto/rugged-gemini/configuration-management-principles"><img src="https://agentmods.dev/badge/skills/irahardianto/rugged-gemini/configuration-management-principles/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/irahardianto/rugged-gemini/configuration-management-principles"><img src="https://agentmods.dev/badge/skills/irahardianto/rugged-gemini/configuration-management-principles.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 | $0.00032 | $0.00538 |
| Opus 5 | $0.00016 | $0.00269 |
| Sonnet 5 | $0.00006 | $0.00108 |
| Haiku 4.5 | $0.00003 | $0.00054 |
Grade A, and why
configuration-management-principles 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 11d 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.
What it actually says
Configuration Management Principles
Config vs Code
Config: env-specific values (URLs, creds, timeouts), changes between envs, changes without deploy. Code: business logic, same across envs, requires deploy.
Never hardcode: ❌ const DB_URL = "postgresql://prod:5432" → ✅ const DB_URL = process.env.DATABASE_URL
Validation (at startup)
Fail fast if required config missing/invalid. Clear error: "DATABASE_URL required."
Checks: type, format (URL/email/path), range (port 1-65535), dependencies (feature X → config Y required).
Hierarchy (highest → lowest)
- CLI args — override everything (testing/debug)
- Env vars — override config files
- Config files — env-specific (config.prod.yaml)
- Defaults — reasonable fallback
Organization
Hybrid: config files for structure + .env for secrets.
.env files: secrets + env-specific values only. Never committed except .env.template.
.env.template— blank values (COMMIT).env.development— local creds (DO NOT COMMIT)
DEV_DB_HOST=123.45.67.89
DEV_DB_USERNAME=prod_user
DEV_DB_PASSWORD=a_very_secure_production_password
Feature files: grouped by function. Primary method for non-secret settings.
default: &default
adapter: postgresql
pool: 5
development:
<<: *default
host: localhost
database: myapp_dev
username: <%= ENV['DEV_DB_USERNAME'] %>
password: <%= ENV['DEV_DB_PASSWORD'] %>
production:
<<: *default
host: <%= ENV['PROD_DB_HOST'] %>
database: myapp_prod
username: <%= ENV['PROD_DB_USERNAME'] %>
password: <%= ENV['PROD_DB_PASSWORD'] %>
Feature flags are a distinct, PRD-gated concern — see @.gemini/skills/feature-flags-principles/SKILL.md.
Related
- Security Mandate GEMINI.md § Security Mandate
- Security Principles GEMINI.md § Security Principles
- Feature Flags @.gemini/skills/feature-flags-principles/SKILL.md
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.
- 11d ago First seen · 71 lines · 32 tokens per session scan A 6ebcd9b45166
configuration-management-principles is a skill published in the GitHub repository irahardianto/rugged-gemini (5 stars, last pushed 4mo ago), licensed MIT. It adds 32 tokens to every session and 538 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 2026-08-31.
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