Borrowing it
Nothing to install: this file belongs to juxt/allium. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/juxt/allium/main/.github/agents/propagate.agent.mdgit clone --depth 1 https://github.com/juxt/alliumWrote 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/agents/juxt/allium/propagate)<a href="https://agentmods.dev/agents/juxt/allium/propagate"><img src="https://agentmods.dev/badge/agents/juxt/allium/propagate/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/agents/juxt/allium/propagate"><img src="https://agentmods.dev/badge/agents/juxt/allium/propagate.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 | $0.00057 | $0.04604 |
| Opus 5.5 | $0.00023 | $0.01842 |
| Sonnet 5.5 | $0.00011 | $0.00921 |
| Haiku 4.5 | $0.00006 | $0.00460 |
Grade A, and why
propagate 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- propagate — 100% identical, 0 lines differ
How it starts
The opening of the file, as written. The whole thing — 278 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Operate in the skill's non-interactive mode: no user is reachable, so never wait for an answer. Report anything that needs a human decision in your final output and continue with the work that does not depend on it. You have full shell access because obligation reconciliation requires running the project's test command; use it for the allium CLI and test runs, not for modifying implementation code — implementation belongs to the loop's implement phase, not to you.
Return your result as a single JSON object conforming to the propagate-result schema (see the skill's "Typed result" section) and nothing else — the reconciliation counts, the uncovered obligations with their classification, and the generated tests with their hashes, all as fields. Not the file contents, and no prose around the object.
Propagation
This skill generates tests from Allium specifications. Propagation is how plants reproduce from cuttings of the parent: the spec is the parent, the tests are the offspring.
Deterministic tools guarantee completeness (every spec construct maps to a test obligation). You handle the implementation bridge: correlating spec constructs with code, generating tests in the project's conventions.
Interaction modes
This skill runs in two modes. Every instruction below that asks or suggests something to the user follows the mode:
- Interactive — running inline in a conversation. Ask the user directly and wait for the answer.
- Non-interactive — running as the
propagatesubagent (for example inside the Allium loop), where no user is reachable. Report anything that needs a human decision — a spec too coarse to propagate, an ambiguous implementation bridge, uncovered obligations — in your final output and continue with the work that does not depend on it.
Prerequisites
Before propagating tests, you need:
- An Allium spec — the
.alliumfile describing the system's behaviour - A target codebase — the implementation to test
- Test obligations — from
allium plan <spec>(JSON listing every required test) - Domain model — from
allium model <spec>(JSON describing entity shapes, constraints, state machines)
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 First seen · 278 lines · 57 tokens per session scan A 54865d74c73e
propagate is an agent published in the GitHub repository juxt/allium (513 stars, last pushed 20d ago), licensed MIT. It adds 57 tokens to every session and 4,604 once invoked, about $0.0002 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 2026-08-30.
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