Borrowing it
Nothing to install: this file belongs to isndev/qb-linq. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/isndev/qb-linq/main/.cursor/skills/qb-linq-development/SKILL.mdgit clone --depth 1 https://github.com/isndev/qb-linqWrote 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/isndev/qb-linq/qb-linq-development)<a href="https://agentmods.dev/skills/isndev/qb-linq/qb-linq-development"><img src="https://agentmods.dev/badge/skills/isndev/qb-linq/qb-linq-development/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/isndev/qb-linq/qb-linq-development"><img src="https://agentmods.dev/badge/skills/isndev/qb-linq/qb-linq-development.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 | $0.00069 | $0.00666 |
| Opus 5 | $0.00034 | $0.00333 |
| Sonnet 5 | $0.00014 | $0.00133 |
| Haiku 4.5 | $0.00007 | $0.00067 |
Grade A, and why
qb-linq-development 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 9d 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 — 43 lines — stays where its author put it; the contents beside it link to each section on GitHub.
qb-linq development
When this applies
Use this skill for work inside the qb-linq repository: changing pipelines, iterators, materializers, tests, or benchmarks—not for application code that only consumes qb::linq::from(...).
Required context (read first)
docs/BUILDING.md— CMake targetqb::linq, options, presets,qb_linq_tests/qb_linq_benchmark/qb_linq_docs.docs/LLM_CONTEXT.md— include graph, handle types, out-of-line split (query.hvsextra_views.h),materialized_rangepitfall.AGENTS.md— checklist and file map.include/qb/linq.h— Doxygenlinqgroup: public caveats.CONTRIBUTING.md— tests, PR checklist, CHANGELOG for user-visible changes.
Workflow
- Locate the API — Methods on
enumerabletrace toquery_range_algorithmsinquery_range.h. - Declaration vs definition — Declarations in
query_range.h; definitions inquery.horextra_views.hperLLM_CONTEXT.md. - New iterators — Extend patterns in
iterators.horextra_views.h; respect iterator category rules (clamp_iterator_category_twhere appropriate). - Verify — Build
qb_linq_tests, runctest. For perf-sensitive code, enableQB_BUILD_BENCHMARKSand keepqb_linq_benchmarkbuilding. - Portability — Validate on multiple compilers when possible (GCC, Clang, MSVC).
Pitfalls
- Do not break
materialized_rangesafe construction documented inquery.h. select_manyyields a tuple of projections per element, not a flattened sequence (not C#SelectMany).scan_iteratormust not outlivescan_view(F*into the view).reverse()+take/take_while: use the dedicatedreversed_viewspecializations inquery.h; new logical-end iterators must not breakreverse_iteratorequality or bounds.
Output expectations
- Minimal diffs, consistent style and Doxygen.
- Tests for behaviour changes.
- English commit messages; state what and why.
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.
- 9d ago First seen · 43 lines · 69 tokens per session scan A 0a0ca338389f
qb-linq-development is a skill published in the GitHub repository isndev/qb-linq (13 stars, last pushed 9d ago), licensed MIT. It adds 69 tokens to every session and 666 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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