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 pproenca/dot-skills --skill adversarial-swiftgit clone --depth 1 https://github.com/pproenca/dot-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/pproenca/dot-skills/adversarial-swift)<a href="https://agentmods.dev/skills/pproenca/dot-skills/adversarial-swift"><img src="https://agentmods.dev/badge/skills/pproenca/dot-skills/adversarial-swift.svg" alt="Measured on agentmods" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00096 | $0.02667 |
| Opus 5 | $0.00048 | $0.01333 |
| Sonnet 5 | $0.00019 | $0.00533 |
| Haiku 4.5 | $0.00010 | $0.00267 |
Grade A, and why
adversarial-swift 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 5d 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 — 75 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Adversarial Swift Gate
A Swift language review gate — pass/fail: a single blind reviewer subagent judges the work against this gate's rules with an adversarial mandate, and the work passes only when every rule is PASS or N/A. This skill renders verdicts; it never fixes the work.
The rules are filtered down to the checks a reviewer can decide from code evidence alone. The gate judges the failure modes agents and experienced-but-not-expert developers actually produce: continuations that hang, loops that ignore cancellation, serialized independent awaits, hand-synchronized derived state, discarded underlying errors, hand-maintained case lists that rot, boolean parameter rows, O(n²) collection accumulation, and index arithmetic that corrupts on slices.
When to Apply
- A Swift diff, feature, or PR is about to merge and needs an objective PASS/FAIL, not advisory feedback — any target: app logic, server-side Swift, CLI tools, packages.
- An agent (Claude, Codex) authored the code and you want an independent check that it is not reproducing the classic concurrency and error-handling failure shapes (unresumed continuation branches,
try? await Task.sleepposing as a cancellation check,catchblocks that throw payload-free domain cases) or hand-rolling what the compiler synthesizes (CaseIterable,Comparable, memberwise inits, definite-initialization checking). - Pre-concurrency or Objective-C-era Swift is being modernized and the ported surface needs auditing against current language affordances (
@unknown default,rethrows,canImport,reduce(into:),count(where:),String(validating:)).
Do not apply to non-Swift codebases (the reviewer prompt's precondition aborts with "GATE NOT APPLICABLE"), or when the user wants explanations and refactors rather than a verdict. SwiftUI-specific review (state ownership, view identity, update cost, task lifecycle, lists, accessibility) is owned entirely by the sibling adversarial-swift-ui gate — this gate's rules are framework-independent and stay in scope alongside it. Rules whose remedy needs a newer toolchain than the project's are N/A, not FAIL — the reviewer prompt carries the version-gate table.
What ships with it
41 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.
- assets/templates/verdict.md 2.1 KB
- gotchas.md 6.8 KB
- metadata.json 1.1 KB
- references/_sections.md 5.1 KB
- references/api-autoclosure-conditional-params.md 2.4 KB
- references/api-final-or-private-classes.md 2.1 KB
- references/api-memberwise-init-via-extension.md 2.3 KB
- references/api-never-for-nonreturning-paths.md 2.7 KB
- references/api-opaque-return-over-concrete-nesting.md 2.9 KB
- references/api-optionset-over-boolean-rows.md 2.3 KB
- references/api-unavailable-on-fatalerror-stubs.md 2.3 KB
- references/coll-count-where-over-filter-count.md 1.4 KB
- references/coll-dictionary-default-subscript.md 1.7 KB
- references/coll-mapvalues-value-only-transforms.md 1.7 KB
- references/coll-optional-chaining-in-place-mutation.md 1.7 KB
- references/coll-reduce-into-accumulators.md 1.7 KB
- references/conc-async-let-for-independent-awaits.md 2.5 KB
- references/conc-check-cancellation-in-loops.md 2.6 KB
- references/conc-concurrent-offload-under-mainactor-default.md 3.2 KB
- references/conc-resume-continuation-every-path.md 3.0 KB
- references/conc-taskgroup-for-dynamic-fanout.md 2.8 KB
- references/enum-caseiterable-over-hand-lists.md 2.3 KB
- references/enum-caseless-namespaces.md 2.0 KB
- references/enum-derived-comparable-declaration-order.md 2.9 KB
- references/enum-unknown-default-external-enums.md 2.2 KB
- references/err-callsite-location-default-args.md 2.5 KB
- references/err-preserve-underlying-error.md 2.8 KB
- references/err-result-get-over-manual-switch.md 1.6 KB
- references/err-rethrows-for-closure-only-throws.md 2.3 KB
- references/err-warning-directive-for-pending-work.md 2.0 KB
- references/flow-branch-assigned-let.md 2.0 KB
- references/flow-canimport-over-os-chains.md 2.2 KB
- references/flow-raw-strings-escape-heavy.md 1.3 KB
- references/flow-take-for-one-shot-optionals.md 1.7 KB
- references/flow-validating-untrusted-bytes.md 2.1 KB
- references/flow-zip-indices-over-enumerated.md 2.4 KB
- references/prop-computed-over-stored-derived.md 2.5 KB
- references/prop-defer-observed-init-assignments.md 2.6 KB
- references/prop-discard-self-in-consuming-cleanup.md 2.3 KB
- references/prop-private-set-internal-mutation.md 2.6 KB
- references/reviewer-prompt.md 6.5 KB
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.
- 5d ago First seen · 75 lines · 96 tokens per session scan A f68e0b90f76b
adversarial-swift is a skill published in the GitHub repository pproenca/dot-skills (203 stars, last pushed 23d ago), licensed MIT. It adds 96 tokens to every session and 2,667 once invoked, about $0.0005 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 2026-09-03.
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