System Prompts Leaks is a collection of captured system instructions used to guide AI chatbots and coding agents before they receive user messages. It serves researchers and developers studying how different AI assistants are directed.
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 asgeirtj/system_prompts_leaks --skill todoistgit clone --depth 1 https://github.com/asgeirtj/system_prompts_leaksWrote 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/asgeirtj/system_prompts_leaks/todoist)<a href="https://agentmods.dev/skills/asgeirtj/system_prompts_leaks/todoist"><img src="https://agentmods.dev/badge/skills/asgeirtj/system_prompts_leaks/todoist/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/asgeirtj/system_prompts_leaks/todoist"><img src="https://agentmods.dev/badge/skills/asgeirtj/system_prompts_leaks/todoist.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 | $0.00028 | $0.00326 |
| Opus 5.5 | $0.00011 | $0.00130 |
| Sonnet 5.5 | $0.00006 | $0.00065 |
| Haiku 4.5 | $0.00003 | $0.00033 |
Grade A, and why
todoist 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 21d 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
Todoist
Use the installed todoist CLI. Start with todoist status. If it reports
not_connected, run todoist authorize-url and share only the returned
connect_url with the user.
OAuth uses Dynamic Client Registration and PKCE through authd. No shared client secret enters Muse, and credentials must never be requested in chat.
The first connection requests read-only Todoist access. If a requested change fails because Todoist write or delete access has not been granted, direct the user to add it in Settings; Hatch approval for the action remains separate.
Run todoist list-tools to inspect the live provider catalogue and schemas,
then call an advertised tool with:
todoist call-tool --name <tool> --arguments-json '<json-object>'
list-tools exposes only reviewed Todoist tools and includes each tool's
hatch_permission, hatch_action, and hatch_permission_label.
delete-object is authorized as projects.delete for projects and as
items.delete for every other object type. Unknown or new provider tools
remain unavailable until reviewed. Read permissions follow the user's connector
settings; changes require the corresponding granular approval. Do not retry a
failed or timed-out write automatically because its side effect may have
completed.
What ships with it
2 files 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.
- 21d ago First seen · 36 lines · 28 tokens per session scan A 2ab7d06e6b4e
todoist is a skill published in the GitHub repository asgeirtj/system_prompts_leaks (70,207 stars, last pushed today), licensed CC0-1.0. It adds 28 tokens to every session and 326 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 2026-10-05.
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