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 ariaramin/flutter-skills --skill flutter-app-links-deep-link-engineeringgit clone --depth 1 https://github.com/ariaramin/flutter-skillsWrote 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/ariaramin/flutter-skills/flutter-app-links-deep-link-engineering)<a href="https://agentmods.dev/skills/ariaramin/flutter-skills/flutter-app-links-deep-link-engineering"><img src="https://agentmods.dev/badge/skills/ariaramin/flutter-skills/flutter-app-links-deep-link-engineering/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/ariaramin/flutter-skills/flutter-app-links-deep-link-engineering"><img src="https://agentmods.dev/badge/skills/ariaramin/flutter-skills/flutter-app-links-deep-link-engineering.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 | $0.00145 | $0.03687 |
| Opus 5.5 | $0.00058 | $0.01475 |
| Sonnet 5.5 | $0.00029 | $0.00737 |
| Haiku 4.5 | $0.00015 | $0.00369 |
Grade A, and why
flutter-app-links-deep-link-engineering 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 27d 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.
How it starts
The opening of the file, as written. The whole thing — 467 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Flutter app_links Deep-Link Engineering
Mission
Build one secure, testable deep-link pipeline from operating-system delivery to application navigation. Treat app_links as a platform link-delivery adapter only; keep routing, validation, authentication, authorization, deduplication, business idempotency, and user-facing semantics in explicit application layers.
Use this governing model:
external URI
→ OS association / registered scheme
→ app_links delivery
→ Uri parsing and origin validation
→ typed DeepLinkIntent
→ duplicate/idempotency gate
→ application readiness
→ authentication
→ authorization / backend validation
→ one router/navigation authority
→ destination
Never collapse these layers. A valid platform association does not make URI contents trusted, and a logged-in user is not automatically authorized for the linked resource.
Non-negotiable invariants
- Inspect the existing delivery path before adding
app_links. - Choose exactly one authoritative platform deep-link owner.
- Treat every incoming URI as untrusted external input.
- Parse with
Uri; do not split URLs manually. - Validate scheme, host, route shape, and parameters before routing.
- Convert accepted URIs to typed intents in non-trivial applications.
- Do not pass arbitrary raw external URLs deep into business logic.
- Do not navigate until application readiness is resolved.
- Revalidate pending intents after login/account changes.
- Authentication never replaces authorization.
- Possession of a link never proves resource permission.
- Make duplicate delivery harmless.
- Separate navigation deduplication from business-operation idempotency.
- Prefer verified HTTPS App/Universal Links for sensitive public flows when practical.
- Never execute destructive side effects directly from the link callback.
- Never log reset tokens, magic codes, invitation secrets, auth codes, or complete sensitive URLs.
- Test cold start, runtime delivery, auth deferral, and production association.
- Verify release signing/domain association rather than assuming debug success proves production readiness.
- Treat published URL formats as compatibility contracts.
- Keep
app_linksvendor/package APIs at the infrastructure boundary.
What ships with it
5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 27d ago First seen · 467 lines · 145 tokens per session scan A eb58c1196fea
flutter-app-links-deep-link-engineering is a skill published in the GitHub repository ariaramin/flutter-skills (8 stars, last pushed 7d ago), licensed MIT. It adds 145 tokens to every session and 3,687 once invoked, about $0.0006 per session on Opus 5.5. 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 2026-10-11.
flutter-app-links-deep-link-engineering compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| flutter-app-links-deep-link-engineeringariaramin/flutter-skills | Skill | 8 | 7d ago | MIT | A | 145 | Claude Code, Codex |
| opencli-autofixjackwener/OpenCLI | Skill | 31k | yesterday | Apache-2.0 | A | 61 | Claude Code |
| webapp-testingHmbown/CodeWhale | Skill | 41k | 5d ago | MIT | A | 32 | Claude Code, Codex |
| computer-usebojieli/ai-agent-book | Skill | 57k | 29d ago | Apache-2.0 | A | 139 | Claude Code, Codex |
| preview-screensmicrosoft/power-platform-skills | Skill | 1.1k | yesterday | MIT | A | 41 | Claude Code |
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