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 skills add jxoesneon/Ciel --skill ai-first-engineeringgit clone --depth 1 https://github.com/jxoesneon/CielWrote 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/jxoesneon/ciel/ai-first-engineering)<a href="https://agentmods.dev/skills/jxoesneon/ciel/ai-first-engineering"><img src="https://agentmods.dev/badge/skills/jxoesneon/ciel/ai-first-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/jxoesneon/ciel/ai-first-engineering"><img src="https://agentmods.dev/badge/skills/jxoesneon/ciel/ai-first-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 | $0.00019 | $0.00544 |
| Opus 5 | $0.00010 | $0.00272 |
| Sonnet 5 | $0.00004 | $0.00109 |
| Haiku 4.5 | $0.00002 | $0.00054 |
Grade A, and why
ai-first-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 8d 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
CIEL ADAPTATION: AI-First Engineering
This skill provides CIEL's core philosophy for engineering in an AI-native environment. It prioritizes planning quality, deterministic verification, and agent-friendly architectures.
Integration Context
Adapted from ~/.agents/skills/ai-first-engineering/. This is CIEL's "Cultural Directive" for how it designs its own processes and reviews.
Core Mandates
1. Planning Over Typing
The orchestration skill must prioritize the "Research -> Strategy" phase. Implementation is a derivative of a well-defined plan.
2. Agent-Friendly Architecture
When proposing refactors or new features, prioritize:
- Explicit Boundaries: Decoupled services and clear API contracts.
- Typed Interfaces: Use TypeScript, Zod, or formal schemas for all data flow.
- Deterministic Tests: No flaky tests; every failure must be reproducible.
3. Elevated Testing Standard
For all CIEL-orchestrated work:
- Regression coverage is mandatory for touched domains.
- Explicit assertions for edge cases and failure modes.
- Integration checks for all interface boundaries.
Orchestration Logic
1. Architectural Review
The Council of Five must evaluate all major architectural proposals against the "Agent-Friendly" criteria.
2. Review Focus
CIEL's internal code review (via agentic-engineering) must focus on system behavior, security, and integrity, ignoring style issues covered by automation.
3. Hiring & Evolution
Use this skill to refine CIEL's own "Self-Improvement" strategies, focusing on the quality of its own generated plans and evals.
Original Documentation preserved at source.
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.
- 8d ago First seen · 77 lines · 19 tokens per session scan A adaba4dafe6a
ai-first-engineering is a skill published in the GitHub repository jxoesneon/Ciel (1 stars, last pushed yesterday), licensed Apache-2.0. It adds 19 tokens to every session and 544 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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