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 AmadeusITGroup/otter --skill otter-schematicsgit clone --depth 1 https://github.com/AmadeusITGroup/otterWrote 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/amadeusitgroup/otter/otter-schematics)<a href="https://agentmods.dev/skills/amadeusitgroup/otter/otter-schematics"><img src="https://agentmods.dev/badge/skills/amadeusitgroup/otter/otter-schematics/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/amadeusitgroup/otter/otter-schematics"><img src="https://agentmods.dev/badge/skills/amadeusitgroup/otter/otter-schematics.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00060 | $0.00548 |
| Opus 5 | $0.00030 | $0.00274 |
| Sonnet 5 | $0.00012 | $0.00110 |
| Haiku 4.5 | $0.00006 | $0.00055 |
Grade A, and why
otter-schematics 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 10d 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 — 45 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Otter Schematics
Otter (@o3r/) is an Angular framework extension.
When creating or modifying components, libraries, or services, Otter schematics must be used instead of manually creating file structures.
This ensures consistent code generation and prevents ad-hoc layouts that drift from conventions.
When to Use
- Creating any new Angular artifact (component, library, service, fixture)
- Scaffolding structure for a new feature
Core Rule: Schematics Over Manual File Creation
If a schematic exists for the artifact type, use it. Manual file creation is only acceptable when no schematic covers the case.
Use the @o3r/mcp MCP server to discover available schematics for the project and their options.
If the MCP server is not available, invoke the otter-mcp-setup skill to guide installation, then re-run this skill.
Preview before committing to a run: ng g <schematic> --dry-run lists the files that would be created or modified, and --help lists the current options.
When a schematic cannot be run
A schematic may fail or be unavailable — a version mismatch, a workspace the generator does not recognise, a broken install. Do not hand-write the files from memory, and do not invent a layout. Read what the schematic would have done and reproduce it:
- Locate the schematic in the installed package. Its
collection.jsonmaps each schematic name to a factory; the factory's directory holds the rules and the templates. - Read the factory and its templates. They are the source of truth for file names, folder layout, decorators, imports, and any file the generator also modifies (barrels, module registration, styling entry points).
- Apply the same changes by hand, keeping exactly the naming and structure the templates dictate.
- Report that the schematic failed, why, and what was reproduced manually, so a reviewer knows the layout was derived rather than generated.
This is the same approach the otter-migration agent uses for migration schematics: read the bundled code, then apply the equivalent changes.
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.
- 10d ago First seen · 45 lines · 60 tokens per session scan A 4a06046afff6
otter-schematics is a skill published in the GitHub repository AmadeusITGroup/otter (58 stars, last pushed yesterday), licensed BSD-3-Clause. It adds 60 tokens to every session and 548 once invoked, about $0.0003 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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