FluxDown is a free, open-source download manager built with Rust that handles web downloads, FTP, BitTorrent, eD2K, and HLS or DASH streams. It is for people who want resumable, browser-integrated downloads with a local desktop interface, and its built-in MCP server lets AI clients manage those downloads.
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.
git clone --depth 1 https://github.com/zerx-lab/FluxDownWrote 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/zerx-lab/fluxdown/build-verifier)<a href="https://agentmods.dev/agents/zerx-lab/fluxdown/build-verifier"><img src="https://agentmods.dev/badge/agents/zerx-lab/fluxdown/build-verifier/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/zerx-lab/fluxdown/build-verifier"><img src="https://agentmods.dev/badge/agents/zerx-lab/fluxdown/build-verifier.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 | $0.00048 | $0.00522 |
| Opus 5.5 | $0.00019 | $0.00209 |
| Sonnet 5.5 | $0.00010 | $0.00104 |
| Haiku 4.5 | $0.00005 | $0.00052 |
Grade A, and why
build-verifier 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 2d 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.
The source is not reproduced here
Licensed AGPL-3.0
The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.
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.
- 2d ago Changed 35b39f5e9607
- 3d ago Changed · +1 lines 150811607f01
- 8d ago Changed 4b578ee97f6f
- 13d ago Changed 0c53ce82f0d2
- 16d ago Changed 5e860d8c67ab
- 26d ago Changed da2ab9af4605
- 1mo ago First seen · 22 lines · 48 tokens per session scan A ed0d0a021c35
build-verifier is an agent published in the GitHub repository zerx-lab/FluxDown (5,039 stars, last pushed today), licensed AGPL-3.0. It adds 48 tokens to every session and 522 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.
Other agents, from other repositories
rust-testing-engineer
Rust testing specialist focused on comprehensive test coverage with nextest and criterion, test infrastructure, and quality assurance. Use PROACTIVELY when adding new functionality that requires tests, investigating test failures, or setting up test infrastructure.
rust-implementer
Rust TDD implementer worker. Makes a frozen failing test suite pass with the smallest idiomatic change; forbidden from modifying test files. Half of the adversarial Rust fix pair (with rust-test-author). Use when implementing Rust code against frozen tests.
rust-test-author
Rust TDD test-author worker. Writes failing tests against a provided spec/acceptance criteria and freezes them on commit; forbidden from writing implementation code. Half of the adversarial Rust fix pair (with rust-implementer). Use when a Rust change needs tests authored before implementation.
rust-pro
Implements or refactors Rust against the repo's conventions, verifying with its build/test/clippy/fmt gate; returns a change report with verbatim gate output. - Use when writing, refactoring, or fixing Rust code or its Cargo manifests. Spawn one per module-sized task. Not for reviewing a diff (rust-reviewer).
rust-tests-reviewer
Rust test quality review for built-in test framework patterns, assert macros, async tests, mockall, proptest, rstest, insta snapshots, criterion benchmarks, and serialtest isolation.
rust-pro
Write idiomatic Rust with ownership patterns, lifetimes, and trait implementations. Masters async/await, safe concurrency, and zero-cost abstractions. Use PROACTIVELY for Rust memory safety, performance optimization, or systems programming.