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 agentmods add skills/devoncarew/flutter-slipstream/slipstream-packagesnpx skills add devoncarew/flutter-slipstream --skill slipstream-packagesgit clone --depth 1 https://github.com/devoncarew/flutter-slipstreamWrote 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/devoncarew/flutter-slipstream/slipstream-packages)<a href="https://agentmods.dev/skills/devoncarew/flutter-slipstream/slipstream-packages"><img src="https://agentmods.dev/badge/skills/devoncarew/flutter-slipstream/slipstream-packages.svg" alt="Measured on agentmods" 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 | $0.00085 | $0.00380 |
| Opus 5 | $0.00043 | $0.00190 |
| Sonnet 5 | $0.00017 | $0.00076 |
| Haiku 4.5 | $0.00009 | $0.00038 |
Grade A, and why
slipstream-packages 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 4d 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
Dart Package API Lookup
Training-data summaries for pub packages are often subtly out-of-date: incorrect
parameter names, missing required/optional distinctions, wrong constructor
shapes, renamed or removed APIs. The packages tools read directly from the
local pub cache — exact signatures, always matches pubspec.lock, no network
required.
Call sequence
package_summary(project_directory, package)— always start here. Returns version, entry-point import, library list, and exported name groups. Often enough to confirm the right import path and top-level names.library_stub(project_directory, package, library_uri)— full public API for one library as Dart signatures (no bodies, no private members). Use when you need exact constructor shapes, named parameter names, or return types.class_stub(project_directory, package, library_uri, class)— single class stub including inherited and mixin-contributed members. Use when you know exactly which class you need.
project_directory is the absolute path to the Dart/Flutter project (the
directory containing pubspec.yaml). Run dart pub get first if
.dart_tool/package_config.json is missing.
Limitation
Constants values are not shown in stubs.
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.
- 4d ago First seen · 40 lines · 85 tokens per session scan A aab2b9c8d612
slipstream-packages is a skill published in the GitHub repository devoncarew/flutter-slipstream (5 stars, last pushed 17d ago), licensed BSD-3-Clause. It adds 85 tokens to every session and 380 once invoked, about $0.0004 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 2026-08-31.
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