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 OutlineDriven/odin-claude-plugin --skill prohibit-bad-habitsgit clone --depth 1 https://github.com/OutlineDriven/odin-claude-pluginWrote 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/outlinedriven/odin-claude-plugin/prohibit-bad-habits)<a href="https://agentmods.dev/skills/outlinedriven/odin-claude-plugin/prohibit-bad-habits"><img src="https://agentmods.dev/badge/skills/outlinedriven/odin-claude-plugin/prohibit-bad-habits/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/outlinedriven/odin-claude-plugin/prohibit-bad-habits"><img src="https://agentmods.dev/badge/skills/outlinedriven/odin-claude-plugin/prohibit-bad-habits.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 | $0.00037 | $0.01174 |
| Opus 5.5 | $0.00015 | $0.00470 |
| Sonnet 5.5 | $0.00007 | $0.00235 |
| Haiku 4.5 | $0.00004 | $0.00117 |
Grade A, and why
prohibit-bad-habits 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 1mo 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 — 65 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Prohibit bad habits
Contract
| Field | Bound contract |
|---|---|
| Trigger | Human requests that specific agent behavior patterns be documented as prohibited in a structured project document or agent-rule file rather than in AGENTS.md. |
| Authority | Reversible local: writes only the named local artifact; rollback is deleting the written file if it did not exist before and the human has not confirmed it. No remote mutation. |
| Side effect | Local file write: creates or updates one structured project document or agent-rule file that enumerates prohibited agent behavior patterns. |
| Done | A structured artifact exists at the agreed target path and contains at least one prohibited-habit entry with a non-empty name and description, verified by the human. |
Inputs
- Prohibited patterns: required. For each pattern, the human supplies a short name, a concrete description of the behavior to avoid, the negative consequence of that behavior, and optionally a category and a workaround or alternative. If the human cannot supply a concrete description, stop rather than invent one.
- Target location: optional. The human may specify the exact file path. Default:
docs/prohibited-habits.mdfor shared project docs;agent-rules/prohibited-habits.yamlfor agent-rule locations. - Authority confirmation: the human confirms or revises the target path before the write occurs.
Procedure
- Gather prohibited patterns. Ask the human to list each pattern to prohibit. For each, collect: name (short identifier), description (concrete behavior to avoid), consequence (what goes wrong when the agent does this), and optionally category and workaround. If the human cannot supply a concrete description, stop without writing. Done when: every pattern the human listed has a name and a concrete description, and any pattern lacking a description is named as blocked rather than invented.
- Confirm target location. Accept the human's specified path, or use
docs/prohibited-habits.mdfor a shared-project location oragent-rules/prohibited-habits.yamlfor an agent-rules location. Present the chosen path to the human and wait for confirmation before proceeding. Done when: the human has confirmed or revised the path, and the path is recorded for the write. - Choose format. Use Markdown (
*.md) if the target is underdocs/or the human requests it. Use YAML (*.yaml) if the target is underagent-rules/or multiple agent-rule files already exist in the project. Otherwise default to Markdown. Done when: the format matches the target path extension, or the default is chosen and the path extension agrees with it. - Draft file content. Write the following structure to the confirmed path:
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.
- 1mo ago Changed · +1 lines c8c1103d4687
- 1mo ago Changed · -14 tokens per session 754f8a08c0f0
- 1mo ago First seen · 64 lines · 51 tokens per session scan A e27c42ec2333
prohibit-bad-habits is a skill published in the GitHub repository OutlineDriven/odin-claude-plugin (40 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 37 tokens to every session and 1,174 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-09-04.
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