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 borski/travel-hacking-toolkit --skill fallback-and-resiliencegit clone --depth 1 https://github.com/borski/travel-hacking-toolkitWrote 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/borski/travel-hacking-toolkit/fallback-and-resilience)<a href="https://agentmods.dev/skills/borski/travel-hacking-toolkit/fallback-and-resilience"><img src="https://agentmods.dev/badge/skills/borski/travel-hacking-toolkit/fallback-and-resilience/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/borski/travel-hacking-toolkit/fallback-and-resilience"><img src="https://agentmods.dev/badge/skills/borski/travel-hacking-toolkit/fallback-and-resilience.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
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 →
- medium MCP Rug Pull · line 78 Docker image references without a specific tag (:latest is implicit) or digest (@sha256:...) can be silently replaced by a malicious image.Fix: Pin the image: image:tag or image@sha256:abc123
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 | $0.00043 | $0.01538 |
| Opus 5 | $0.00022 | $0.00769 |
| Sonnet 5 | $0.00009 | $0.00308 |
| Haiku 4.5 | $0.00004 | $0.00154 |
Grade A, and why
fallback-and-resilience scanned grade A 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
- **If an MCP server returns an error,** try the curl-based skill equivalent (or vice versa). How it starts
The opening of the file, as written. The whole thing — 81 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Fallback and Resilience
Tools go down. APIs break. Have a backup plan for every search.
| Primary Tool | When It Fails | Fallback |
|---|---|---|
| Duffel | API error or timeout | Ignav, Google Flights skill, Skiplagged |
| Ignav | API error | Duffel, Google Flights skill, Skiplagged |
| Google Flights | agent-browser error | Duffel, Ignav, Skiplagged |
| Skiplagged | 502/timeout (Cloudflare issues) | Kiwi.com MCP, Duffel, Ignav |
| Kiwi.com | Server error | Skiplagged MCP, Duffel |
| Seats.aero | API error or stale data | Check airline website directly, use Duffel for GDS inventory |
| Southwest | SW rate limiting or bot detection | Wait a few minutes and retry. Use Docker (ghcr.io/borski/sw-fares) if running locally fails. Google Flights skill for SW cash prices as a fast fallback. |
| SerpAPI | Rate limit (100/mo free) | Trivago for hotels, web search for destination discovery |
| Trivago | Server error | LiteAPI for hotels, SerpAPI Google Hotels |
| LiteAPI | Auth error (401) | Trivago MCP, SerpAPI Google Hotels |
| Airbnb | Scraping blocked | Suggest user check airbnb.com directly |
| AwardWallet | API error | Ask user for their balances directly |
| Ferryhopper | Server error | SerpAPI or web search for ferry routes |
| Atlas Obscura | Script error | Web search for "unusual things to do in [destination]" |
| Chase Travel | Login failure or CSRF issues | Use Duffel/Ignav for cash prices. Note that Points Boost and Edit detection are Chase-only. |
| Amex Travel | Login failure or form changes | Use Duffel/Ignav for cash prices. Note that IAP fares and FHR/THC detection are Amex-only. |
| Deutsche Bahn (db-vendo) | Library error or bahn.de outage | SerpAPI Google Travel Explore, web search for "DB train [origin] [dest]", or fall back to confirming flight options instead. |
| Wikipedia airports | API rate limit (rare) or page missing | Web search "[airport name] airlines destinations" returns the same data via Google. |
| Fare tool says "no results" | Could be no availability OR no service | Use wikipedia-airports to confirm whether the route is flown at all. If Wikipedia lists the destination as served, fare tools have no availability on that date. If Wikipedia doesn't list it, the route doesn't exist. Saves you from asking the user to retry searches that can never succeed. |
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 · 81 lines · 43 tokens per session scan A d84f29d052b4
fallback-and-resilience is a skill published in the GitHub repository borski/travel-hacking-toolkit (659 stars, last pushed 3d ago), licensed MIT. It adds 43 tokens to every session and 1,538 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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