add-builtin-main-plugin SKILL.md skillA
add-builtin-main-plugin from hua-bang/pulse-agent is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add hua-bang/pulse-agent/add-builtin-main-plugin@git:20260711.2153867Pins git:20260711.2153867 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- hua-bang/pulse-agent
- Path
apps/canvas-workspace/harness/skills/add-builtin-main-plugin/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260711.2153867, committed Jul 11, 2026
- Size
- 2,952 bytes
- Repository stars
- 30
- License
- MIT
Use when adding a built-in main-process canvas plugin (the channel / dynamic-app / webview-page-control shape) — especially one gated by an experimental flag. Covers the registration points and the flag-timing landmine that has been copy-pasted three times instead of documented.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Add a Built-in Main Plugin An ordered procedure. Sequence + landmines only; read the three existing plugins for working precedent (`src/plugins/main/channel/`, `dynamic-app/`, `webview-page-control/`). ## Steps 1. **Implement `MainCanvasPlugin`** (`src/plugins/types.ts`) in a new `src/plugins/main/<name>/index.ts`. If the plugin registers node capabilities, that contract is `harness/knowledge/plugin-node-mf2.md`; this skill is about the PLUGIN shell, not the node contract. 2. **Register in `BUILT_IN_MAIN_PLUGINS`** (`src/plugins/main/built-in.ts`) — the array is the activation list; not being in it means the plugin never runs. 3. **THE flag-timing landmine (the reason this skill exists).** If the plugin is gated by an experimental flag via `enabledWhen`, that predicate runs at plugin REGISTRATION time in the main process — **before the renderer exists**, so it cannot round-trip through IPC. It must read the persisted flags file synchronously from disk. All three existing plugins carry the identical hand-copied warning comment about this (`channel/index.ts`, `dynamic-app/index.ts`, `webview-page-control/index.ts` — the same lesson was re-learned three times, which is why it… …
Read the whole file at its exact version.
How to install
mdr add hua-bang/pulse-agent/add-builtin-main-plugin@sha256:3c248faaea34668fThe line at the top of this page pins the label git:20260711.2153867, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_y6bxtraez56zdixl)
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Versions
The registry has recorded 1 version of this file, committed on Jul 11, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (2952 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
hua-bang/pulse-agent · 30 stars · license MIT · pushed 2026-11-06 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_y6bxtraez56zdixl GET https://markdownregistry.com/api/v1/resolve?ref=hua-bang/pulse-agent/add-builtin-main-plugin GET https://markdownregistry.com/api/v1/blob/3c248faaea34668f3b770c3178d3d7c68634e9e78f70a6dad0d3180ba38c821d
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.