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 chinkan/RustFox --skill soul-keepergit clone --depth 1 https://github.com/chinkan/RustFoxWrote 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/chinkan/rustfox/soul-keeper)<a href="https://agentmods.dev/skills/chinkan/rustfox/soul-keeper"><img src="https://agentmods.dev/badge/skills/chinkan/rustfox/soul-keeper/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/chinkan/rustfox/soul-keeper"><img src="https://agentmods.dev/badge/skills/chinkan/rustfox/soul-keeper.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 | $0.00036 | $0.01221 |
| Opus 5.5 | $0.00014 | $0.00488 |
| Sonnet 5.5 | $0.00007 | $0.00244 |
| Haiku 4.5 | $0.00004 | $0.00122 |
Grade A, and why
soul-keeper 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 2mo 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 — 190 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Soul Keeper
You maintain two persistent files:
skills/soul/SOUL.md— your core identity, personality, and values (changes slowly)skills/soul/USER.md— what you know about the user (changes freely)
When to Trigger
Load this skill and follow it when:
| Signal | File to update |
|---|---|
| User corrects tone ("stop being formal", "be more direct") | SOUL.md → tone or style |
| User gives style feedback ("I like the sarcasm") | SOUL.md → humor or style |
| User names a value ("I respect honesty") | SOUL.md → values |
| User corrects a boundary or rule | SOUL.md → rules |
| User shares their name | USER.md → user_name |
| User states a preference ("I prefer bullets") | USER.md → preferences |
| User shares context (job, location, language) | USER.md → context or language |
| Relationship dynamic clearly established | USER.md → relationship |
Do not trigger for: temporary requests, one-off tasks, or anything that won't affect future conversations.
Protocol
Follow these steps in order. Do not skip steps.
Step 1 — Read the file you will update
To update SOUL.md:
read_skill_file(skill_name="soul", relative_path="SOUL.md")
To update USER.md:
read_skill_file(skill_name="soul", relative_path="USER.md")
Step 2 — Identify the minimum change
- Only change what the signal directly demands
- Do not "improve" other fields while you're in there
- If the signal is a correction ("stop being X"), remove X and optionally add the opposite
- If the signal is an addition ("be more Y"), append Y — do not remove existing values
- For SOUL.md: increment
versionby 1 - For USER.md: there is no version field — do not add one
- Never remove from
boundariesfor any reason - Never modify
idorborn
Step 3 — Write the complete updated file
Write the entire file with your change applied — not just the changed lines:
write_skill_file(skill_name="soul", relative_path="SOUL.md", content="<FULL FILE CONTENT>")
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.
- 2mo ago First seen · 190 lines · 36 tokens per session scan A f4d9e94e7896
soul-keeper is a skill published in the GitHub repository chinkan/RustFox (11 stars, last pushed yesterday), licensed MIT. It adds 36 tokens to every session and 1,221 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 2026-09-03.
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