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 GCWing/Sparo-OS --skill product-app-bridge-componentgit clone --depth 1 https://github.com/GCWing/Sparo-OSWrote 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/gcwing/sparo-os/product-app-bridge-component)<a href="https://agentmods.dev/skills/gcwing/sparo-os/product-app-bridge-component"><img src="https://agentmods.dev/badge/skills/gcwing/sparo-os/product-app-bridge-component/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/gcwing/sparo-os/product-app-bridge-component"><img src="https://agentmods.dev/badge/skills/gcwing/sparo-os/product-app-bridge-component.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 | $0.00059 | $0.00351 |
| Opus 5 | $0.00030 | $0.00176 |
| Sonnet 5 | $0.00012 | $0.00070 |
| Haiku 4.5 | $0.00006 | $0.00035 |
Grade A, and why
product-app-bridge-component 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 12d 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.
What it actually says
Product App Bridge Component Skill
Use this skill when the Product App needs a controlled backend boundary to host capabilities, external systems, or service actions. A Bridge Component is app-private integration logic for one Product App, not a general connector package.
Development Boundary
- Start from the current package facts and generated Bridge scaffold. If the bridge is missing, create it with
CreateProductAppComponentusing kindbridge. - Define callable service actions in
source/actions.json. - Implement action behavior in
source/worker.jsor the generated bridge source files. - Expose bridge capabilities through Product App backend bindings/service actions before UI or agent code calls them.
- Keep permissions minimal and tied to declared action behavior.
Key Decisions
- Name actions by product intent, not by implementation detail.
- Make input and output contracts explicit enough for Surface and Agent callers to use safely.
- Return structured errors that UI and Agent logic can handle.
- Use
product-app-apiwhen bridge calls involveapp.backend, permissions, runtime events, file/network/shell access, or surface wiring.
Validation
- Refresh the Product App lock after package or component graph changes.
- Run Product App package validation.
- Run a capability preview or concrete action fixture when one exists and execution is allowed.
- If an action cannot be executed safely, validate the package/contract and report the unexecuted call as missing runtime evidence.
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.
- 12d ago First seen · 31 lines · 59 tokens per session scan A cebcc5e7be2b
product-app-bridge-component is a skill published in the GitHub repository GCWing/Sparo-OS (21 stars, last pushed 1mo ago), licensed MIT. It adds 59 tokens to every session and 351 once invoked, about $0.0003 per session on Opus 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.
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