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 JustineDevs/premortem --skill user-input-protocolgit clone --depth 1 https://github.com/JustineDevs/premortemWrote 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/justinedevs/premortem/user-input-protocol)<a href="https://agentmods.dev/skills/justinedevs/premortem/user-input-protocol"><img src="https://agentmods.dev/badge/skills/justinedevs/premortem/user-input-protocol/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/justinedevs/premortem/user-input-protocol"><img src="https://agentmods.dev/badge/skills/justinedevs/premortem/user-input-protocol.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 | $0.00184 | $0.02028 |
| Opus 5 | $0.00092 | $0.01014 |
| Sonnet 5 | $0.00037 | $0.00406 |
| Haiku 4.5 | $0.00018 | $0.00203 |
Grade A, and why
user-input-protocol 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 9d 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 — 249 lines — stays where its author put it; the contents beside it link to each section on GitHub.
User Input Protocol
Value: Respect -- the developer's judgment governs all consequential decisions. The agent never assumes when it should ask.
Purpose
Defines a structured format for agents to request human input at decision points. Prevents agents from making assumptions on the developer's behalf, ensures questions include enough context for informed decisions, and provides a pause-and-resume pattern for subagents that cannot directly prompt the user.
Practices
Stop and Present, Never Assume
When you encounter a decision that requires human judgment, stop working immediately. Do not guess. Do not pick the "most likely" option. Present the decision clearly and wait.
Decisions that require human input:
- Business rule ambiguities (two valid interpretations exist)
- Architecture trade-offs (performance vs. simplicity, etc.)
- Scope questions (should this feature include X?)
- Destructive actions (deleting files, force-pushing, dropping data)
Decisions that do NOT require human input:
- Implementation details with one clearly correct answer
- Formatting, naming, or style choices covered by project conventions
- Test structure when requirements are unambiguous
Use the AWAITING_USER_INPUT Format
When you need input, output this structured checkpoint:
AWAITING_USER_INPUT
---
Context: [Why you are asking -- what you were doing and what you found]
Decision needed: [The specific question, one sentence]
Options:
A) [Label] -- [What this means and its implications]
B) [Label] -- [What this means and its implications]
C) [Label] -- [What this means and its implications]
Recommendation: [Which option you suggest and why, or "No recommendation"]
---
Rules for the checkpoint:
- Context must explain what led to this question (not just "I need input")
- Provide 2-4 specific options. Never ask open-ended "what should I do?"
- Each option must include implications, not just a label
- State your recommendation if you have one -- the developer can override
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.
- 9d ago First seen · 249 lines · 184 tokens per session scan A 4a3e6ebdf93b
user-input-protocol is a skill published in the GitHub repository JustineDevs/premortem (2 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 184 tokens to every session and 2,028 once invoked, about $0.0009 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 2026-09-03.
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