hosting

hosting is a skill for Claude Code, Codex from Generous-Corp/pulp. It costs 77 tokens per session (33,556 once invoked), scanned C, original, MIT.

Load, run, and test VST3 / AU / CLAP / LV2 plugins from Pulp code. Use when working on core/host/ (scanner, pluginslot, signalgraph), when adding a new format backend, when wiring a plugin into a SignalGraph, or when writing an integration test that needs a real plug-in binary.

Skill for Claude CodeCodex

Install

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.

agentmods
npx agentmods add skills/generous-corp/pulp/hosting
Any agent
npx skills add Generous-Corp/pulp --skill hosting
Clone the repo
git clone --depth 1 https://github.com/Generous-Corp/pulp

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for hosting

README.md
[![agentmods](https://agentmods.dev/badge/skills/generous-corp/pulp/hosting.svg)](https://agentmods.dev/skills/generous-corp/pulp/hosting)
Your own site
<a href="https://agentmods.dev/skills/generous-corp/pulp/hosting"><img src="https://agentmods.dev/badge/skills/generous-corp/pulp/hosting.svg" alt="Measured on agentmods" height="20"></a>
Per session 77 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 33,556 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 1 finding. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00077 $0.33556
Opus 5 $0.00039 $0.16778
Sonnet 5 $0.00015 $0.06711
Haiku 4.5 $0.00008 $0.03356

Measured today against content hash 3bffb3b7ac10, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade C, and why

hosting scanned grade C with 1 finding 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 today.

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.

Tells the agent never to refusehighAnti-refusal

Suppressing the ability to decline removes a core safety control; a later harmful request then succeeds.

- **Not every timeline automation lane addresses a device — skip, do not refuse.** `AutomationTarget` also names a track's own mixer controls, so a
.agents/skills/hosting/SKILL.md · 2,268 lines

How it starts

The opening of the file, as written. The whole thing — 2,268 lines — stays where its author put it; the contents beside it link to each section on GitHub.

hosting

When this skill applies

  • Adding or modifying a format backend under core/host/src/plugin_slot_<format>.cpp.
  • Extending PluginSlot::load() to handle a new format in core/host/src/plugin_slot.cpp.
  • Building or routing nodes in SignalGraph.
  • Writing tests that need to load a real plug-in binary.

Mental model

PluginSlot is the uniform interface. Each format backend is a single free function — load_<format>_plugin(info) — that returns a std::unique_ptr<PluginSlot> or nullptr. PluginSlot::load() in plugin_slot.cpp is a small compile-time dispatcher. There is no dynamic registry and no plug-in-per-file hooks; adding a format means:

  1. Write core/host/src/plugin_slot_<fmt>.cpp that defines std::unique_ptr<PluginSlot> load_<fmt>_plugin(const PluginInfo&).
  2. Add the file to core/host/CMakeLists.txt under a if(PULP_HAS_<FMT>) guard. Link the format's SDK. Define PULP_HOST_HAS_<FMT>=1.
  3. Forward-declare the loader and add a case PluginFormat::<FMT>: to the dispatcher in plugin_slot.cpp, guarded by the same macro.

Everything else — tests, scanner, graph wiring — is format-agnostic.

CLAP reference backend

plugin_slot_clap.cpp is the simplest backend to study for dlopen, factory lifetime, parameter metadata, automation, MIDI, and state patterns. VST3 / AU / LV2 also have real loaders, so treat CLAP as a reference for its ABI shape rather than as the only implemented backend. Patterns to mirror:

  • dlopen(RTLD_LAZY | RTLD_LOCAL); on macOS resolve <bundle>.clap/Contents/MacOS/<name> before dlopen.
  • dlsym("clap_entry"); call entry->init(path) exactly once before entry->get_factory(...), and entry->deinit() + dlclose() in the slot's destructor.
  • Pick factory descriptor by info.unique_id when set, else first available. Then fill the returned PluginInfo with any missing name / vendor / version / id fields from the descriptor.
  • The slot must own the clap_host_t it exposes to the plug-in; the plug-in stores the pointer and will deref it later.
  • After a successful CLAP_EXT_STATE restore, clear any cached host parameter edits in the slot. Otherwise get_parameter() can report a stale host-side value even though the plug-in restored its own state.

Read the full file on GitHub · 2,268 lines

Changes

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.

  1. today First seen · 2,268 lines · 77 tokens per session scan C 3bffb3b7ac10

Subscribe to this mod's changes

hosting is a skill published in the GitHub repository Generous-Corp/pulp (16 stars, last pushed today), licensed MIT. It adds 77 tokens to every session and 33,556 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it C with 1 finding (tells the agent never to refuse). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-04.

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