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Instant on-the-fly harness assembler for Claude Code, Hermes, and OpenClaw.
Popcorn Harness is a cross-platform plugin that discovers your available skills, agents, and commands on the fly, then pops them together into an optimized execution harness. No manual selection. No guessing. Just describe your task and let it assemble the right capabilities for you.
User: /popcorn Prep this Next.js app for production
🍿 Popping harness for: Prep this Next.js app for production
Platform: Claude Code (project) | Tier: 3 — Full Pop
Assembled harness:
Phase 1 (parallel): security-review + e2e-testing + seo
Phase 2 (sequential): deployment-patterns -> docker-patterns
Proceed? [y/n/adjust]
How It Works
- Detects platform — Claude Code, Hermes, or OpenClaw
- Discovers capabilities — skills, agents, and commands available in your environment
- Applies progressive disclosure based on task complexity:
- Quick Pop — 1 capability, executes immediately
- Standard Pop — 2-3 capabilities, shows plan, confirms
- Full Pop — 4-5 capabilities or ambiguous task, full confirmation flow
- Assembles execution graph — parallel phases where possible, sequential where required
- Executes and synthesizes — structured output with key findings and action items
Platform Support
| Platform | How capabilities are discovered |
|---|---|
| Claude Code | claude agents CLI + skill dirs (~/.claude/skills, ~/.claude/plugins/*/skills) + command dirs + ECC marketplace (if installed) |
| Hermes | available_skills injected in system prompt |
| OpenClaw | available_skills injected in system prompt |
Installation
Claude Code — recommended
Add this repo as a marketplace, then install from it:
/plugin marketplace add seilk/popcorn-harness
/plugin install popcorn-harness@popcorn-harness
seilk/popcorn-harness points to the GitHub repo, which contains .claude-plugin/marketplace.json.
The second popcorn-harness is the marketplace name field defined in that file.
After installation, run /reload-plugins if commands don't appear immediately.
Claude Code — local development / testing
claude --plugin-dir .
Use /reload-plugins after making changes. The local copy takes precedence over any installed version.
Claude Code — manual install (fallback)
git clone https://github.com/seilk/popcorn-harness ~/.claude/plugins/popcorn-harness
Hermes
cp -r skills/popcorn-harness ~/.hermes/skills/
The skill will appear in available_skills on the next session.
OpenClaw
Add the skills directory to external_dirs in your Hermes config:
# ~/.hermes/config.yaml
skills:
external_dirs:
- /path/to/popcorn-harness/skills
Team / Custom Marketplace
If you host your own Claude Code marketplace, add popcorn-harness as a source:
{
"name": "my-marketplace",
"plugins": [
{
"name": "popcorn-harness",
"source": { "source": "url", "url": "https://github.com/seilk/popcorn-harness.git" }
}
]
}
Or point teammates directly at this repo as a marketplace:
/plugin marketplace add seilk/popcorn-harness
/plugin install popcorn-harness@popcorn-harness
Usage
Claude Code
/popcorn <task description>
Or invoke the orchestrator agent directly from any Claude Code session:
Use popcorn-orchestrator to: <task description>
Hermes
popcorn — <task description>
Or just describe your task and say "use available skills":
use your available skills to review my codebase before deployment
OpenClaw
Same as Hermes — the skill is automatically available once installed.
Examples
Single-domain task (Tier 1 — Quick Pop):
/popcorn run a security review on this repo
-> Pops: security-review (1 capability, executes immediately)
Multi-domain task (Tier 2 — Standard Pop):
/popcorn audit my portfolio and suggest rebalancing
-> Pops: obsidian-finance-vault + tossctl + market-research
-> Shows plan, waits for confirmation
Complex task (Tier 3 — Full Pop):
/popcorn get this app production-ready
-> Pops: security-review + e2e-testing + seo + deployment-patterns + docker-patterns
-> Shows full discovery, proposes phased execution, requires explicit confirmation
Design Principles
- Progressive disclosure — reveal complexity only when needed
- Evidence-based selection — capabilities chosen by description match, not name alone
- Platform-agnostic — same skill file works on Claude Code, Hermes, and OpenClaw
- Budget-bounded — hard cap of 5 capabilities per harness run to preserve quality
- Fail-transparent — missing capabilities are reported, not silently skipped
