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 jellydn/my-ai-tools --skill portless-localgit clone --depth 1 https://github.com/jellydn/my-ai-toolsWrote 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/jellydn/my-ai-tools/portless-local)<a href="https://agentmods.dev/skills/jellydn/my-ai-tools/portless-local"><img src="https://agentmods.dev/badge/skills/jellydn/my-ai-tools/portless-local/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/jellydn/my-ai-tools/portless-local"><img src="https://agentmods.dev/badge/skills/jellydn/my-ai-tools/portless-local.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 5 findings, 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 Privilege Escalation · line 32 Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
- high Privilege Escalation · line 325 Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
- medium Prompt Injection · line 71 Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
- medium Privilege Escalation · line 339 Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
- medium Privilege Escalation · line 407 Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
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 | $0.00016 | $0.03669 |
| Opus 5 | $0.00008 | $0.01835 |
| Sonnet 5 | $0.00003 | $0.00734 |
| Haiku 4.5 | $0.00002 | $0.00367 |
Grade B, and why
portless-local scanned grade B 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 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.
Asks for rootmediumPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
5. Auto-elevates with sudo on macOS/Linux for port binding How it starts
The opening of the file, as written. The whole thing — 437 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Portless - Named .localhost URLs
Replace port numbers with stable, named .localhost URLs for local development. For humans and agents.
Note: By default, use HTTP (
http://myapp.localhost). Only enable HTTPS (--httpsorPORTLESS_HTTPS=1) if the user specifically requests it (e.g., for OAuth, secure cookies, or HTTPS-only features).
Why Portless?
Local dev with port numbers is fragile. Portless fixes that by giving each dev server a stable, named .localhost URL.
| Problem | With Ports | With Portless |
|---|---|---|
| Port conflicts | Two projects on :3000 = EADDRINUSE | Auto-assigned ports, named URLs - no collisions |
| Memorizing ports | "Was the API on 3001 or 8080?" | Always http://api.localhost |
| Wrong app on refresh | Stop one server, start another on same port = confusion | Named URLs eliminate this |
| Monorepo chaos | Every service needs a unique port | Distinct hostnames for each service |
| Agent confusion | AI agents guess/hardcode wrong ports | http://myapp.localhost is deterministic |
| Cookie/storage clashes | Cookies bleed across ports on localhost | Each .localhost subdomain gets its own scope |
| Hardcoded config | CORS, OAuth, .env break when ports change | URLs are stable across restarts |
| Sharing URLs | "What port is that on?" in Slack | Everyone uses the same named URL |
| Browser history | localhost:3000 history is a jumble |
Named URLs keep things organized |
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 · 437 lines · 16 tokens per session scan B 53a9ea01e891
portless-local is a skill published in the GitHub repository jellydn/my-ai-tools (120 stars, last pushed today), licensed MIT. It adds 16 tokens to every session and 3,669 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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