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 0ryant/engineering-doctrine --skill doctrinelibrarychangegit clone --depth 1 https://github.com/0ryant/engineering-doctrineWrote 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/0ryant/engineering-doctrine/doctrinelibrarychange)<a href="https://agentmods.dev/skills/0ryant/engineering-doctrine/doctrinelibrarychange"><img src="https://agentmods.dev/badge/skills/0ryant/engineering-doctrine/doctrinelibrarychange/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/0ryant/engineering-doctrine/doctrinelibrarychange"><img src="https://agentmods.dev/badge/skills/0ryant/engineering-doctrine/doctrinelibrarychange.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 | $0.00083 | $0.00559 |
| Opus 5 | $0.00042 | $0.00280 |
| Sonnet 5 | $0.00017 | $0.00112 |
| Haiku 4.5 | $0.00008 | $0.00056 |
Grade A, and why
DoctrineLibraryChange 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
Doctrine library change (canonical repo)
Use when the user (or task) changes this repository — the versioned doctrine library — not when they only consume doctrine in another product repo.
Canonical path
This skill applies when the open workspace (or path the user provides) is the engineering-doctrine git checkout.
Execution order
- Read
doctrine/patterns/doctrine-library-change-harness.md— full procedure, tables, and §7 agent prompt (copy-paste block). - Research — additions need references and/or a note under
doctrine/evolution/; link from ADR Context / Evidence when non-trivial. - ADR — new
docs/adr/NNNN-*.md+ index update, or reference existing ADR; editorial-only may skip (document in PR). - Author — place text in the right layer; cross-link principle ↔ pattern ↔ tooling; update checklists if new adopter obligations.
- Navigation — run
./scripts/doctrine-change-preflight.shfrom repo root; update glossary, REFERENCES, doctrine/README (and ENGINEERING / tldr / how-to-read when the spine changes). - Verify —
doctrine/checklists/doctrine-change-checklist.md; PR: change class, consumer impact, ADR link. - Releases — CHANGELOG only for material releases (see
GOVERNANCE.mdanddoctrine/patterns/doctrine-versioning-and-consumer-compatibility.md).
Optional Cursor rule
Install from repo: docs/cursor/doctrine-library-change.mdc → .cursor/rules/ (see docs/cursor/README.md).
Related skills
- EngineeringDoctrine — align any work with shared doctrine; this skill is only for editing the library repo itself.
Output
Summarize: files touched, ADR number, change class; do not claim “done” without preflight and checklist alignment.
What ships with it
1 file 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.
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 · 40 lines · 83 tokens per session scan A 77dd839be0da
DoctrineLibraryChange is a skill published in the GitHub repository 0ryant/engineering-doctrine (5 stars, last pushed 2d ago), licensed Apache-2.0. It adds 83 tokens to every session and 559 once invoked, about $0.0004 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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