OpenMontage is an agent-driven video production system that uses coding assistants to handle tasks such as research, scripting, asset creation, editing, and composition. It is intended for people who want to produce videos through natural-language instructions and includes the project's workflows as catalogue add-ons.
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 calesthio/OpenMontage --skill media-usegit clone --depth 1 https://github.com/calesthio/OpenMontageWrote 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/calesthio/openmontage/media-use)<a href="https://agentmods.dev/skills/calesthio/openmontage/media-use"><img src="https://agentmods.dev/badge/skills/calesthio/openmontage/media-use/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/calesthio/openmontage/media-use"><img src="https://agentmods.dev/badge/skills/calesthio/openmontage/media-use.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk warn
- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high Supply Chain · line 119 Remote code is downloaded and executed. This bypasses code review and could introduce malicious code.Fix: Avoid downloading and executing remote scripts. Use trusted packages from PyPI/npm. If remote fetch is required, verify checksums and use HTTPS.
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 | $0.00084 | $0.01456 |
| Opus 5 | $0.00042 | $0.00728 |
| Sonnet 5 | $0.00017 | $0.00291 |
| Haiku 4.5 | $0.00008 | $0.00146 |
Grade C, and why
media-use scanned grade C with 2 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 11d 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.
Downloads and executes remote codehighSupply chain
curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.
curl -fsSL https://static.heygen.ai/cli/install.sh | bash # installs latest to ~/.local/bin Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -fsSL https://static.heygen.ai/cli/install.sh | bash # installs latest to ~/.local/bin 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 ships with it
18 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.
- .gitignore 17 B
- scripts/eval.mjs 15 KB runs code
- scripts/lib/adopt.mjs 3.5 KB runs code
- scripts/lib/bgm-provider.mjs 650 B runs code
- scripts/lib/brand-provider.mjs 1.6 KB runs code
- scripts/lib/cache.mjs 3.2 KB runs code
- scripts/lib/freeze.mjs 1.1 KB runs code
- scripts/lib/heygen-search.mjs 1.8 KB runs code
- scripts/lib/image-provider.mjs 1.4 KB runs code
- scripts/lib/index-gen.mjs 1.9 KB runs code
- scripts/lib/manifest.mjs 2.4 KB runs code
- scripts/lib/manifest.test.mjs 8.4 KB runs code
- scripts/lib/probe.mjs 1.3 KB runs code
- scripts/lib/probe.test.mjs 1.6 KB runs code
- scripts/lib/providers.mjs 759 B runs code
- scripts/lib/sfx-provider.mjs 700 B runs code
- scripts/resolve.mjs 7.7 KB runs code
- scripts/resolve.test.mjs 7.5 KB runs code
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.
- 11d ago First seen · 125 lines · 84 tokens per session scan C 139ac9d65345
media-use is a skill published in the GitHub repository calesthio/OpenMontage (56,948 stars, last pushed 4d ago), licensed AGPL-3.0. It adds 84 tokens to every session and 1,456 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
feature-demo-recording
Record a demo video of a web feature from a real browser. Two modes -- a NARRATED film where measured voiceover drives the timeline (designed slides, subtitles, punch-in camera, rendered from an HTML timeline), and a SILENT evidence clip for a PR or a QA pass. Use when the user asks to record a video, demo, or screen…
docs-manage
Manage the Grounded Docs MCP Server documentation index. Covers scraping and indexing documentation from URLs or local files, refreshing existing indexes with changed content, and removing libraries from the index. Use when you need to add, update, or delete indexed documentation.
fetch-url
Fetch a single URL and convert its content to Markdown. Use when you need to read a web page, documentation page, or API reference without indexing it. The content is returned as plain Markdown text on stdout.
gpt-image-skill
A skill for generating or editing images through OpenAI's GPT Image API, a programming interface for requesting image operations. It uses a bundled Python script and supports configuration such as model, size, quality, and output file.
nanobanana-skill
An image-generation and image-editing skill that uses Google Gemini through the Nanobanana tool. It covers prompts, image sizes, output files, models, resolutions, and required setup.
video-transcription
Transcribe video and audio files to SRT subtitles with speaker diarization using the Soniox (default) or AssemblyAI API. Use when the user wants to transcribe meetings, videos, or audio files. Supports MKV, MP4, MOV, M4A, MP3. Triggers on "/transcribe", "transcribe my meetings", "transcribe videos in /Movies", or any…