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 existential-birds/beagle --skill review-iosgit clone --depth 1 https://github.com/existential-birds/beagleWrote 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/existential-birds/beagle/review-ios)<a href="https://agentmods.dev/skills/existential-birds/beagle/review-ios"><img src="https://agentmods.dev/badge/skills/existential-birds/beagle/review-ios/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/existential-birds/beagle/review-ios"><img src="https://agentmods.dev/badge/skills/existential-birds/beagle/review-ios.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 | $0.00016 | $0.02484 |
| Opus 5.5 | $0.00006 | $0.00994 |
| Sonnet 5.5 | $0.00003 | $0.00497 |
| Haiku 4.5 | $0.00002 | $0.00248 |
Grade A, and why
review-ios 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 1mo 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 — 258 lines — stays where its author put it; the contents beside it link to each section on GitHub.
iOS Code Review
Arguments
--parallel: If the agent supports subagents, dispatch one specialized subagent per technology area- Path: Target directory (default: current working directory)
Hard gates
Complete in order before writing Issues in the output (empty scope is allowed; fabricated findings are not).
- Scope gate: You have an explicit list of
.swiftpaths under review (from Step 1 or a user-provided path). Pass: List captured in working notes or one line:No Swift files in scope— then stop with no Issues. - Linter gate (style): Step 2 commands ran for this tree; if no
.swiftlint.yml/.swiftlint.yaml, note that in one line. Pass: You do not report a style issue that SwiftLint would already enforce for that line when config exists andswiftlintsucceeds. - Protocol gate: review-verification-protocol is loaded before Step 6. Pass: If you report any Issues, at least one finding was checked against that checklist (name the item in Review Summary or on that Issue); if you report zero Issues, state
Protocol applied; no issuesin Review Summary. - Evidence gate (Critical/Major): For each Critical or Major item, you re-read the file at
FILE:LINE(full surrounding context, not only the diff hunk). Pass: The Issue text matches observable code at that location.
Do not begin Step 6 until Gates 1–3 are satisfied (skills load order stays Steps 4–5).
Step 1: Identify Changed Files
git diff --name-only $(git merge-base HEAD main)..HEAD | grep -E '\.swift$'
Step 2: Verify Linter Status
CRITICAL: Run SwiftLint BEFORE flagging any style issues.
# Check if SwiftLint config exists and run it
if [ -f ".swiftlint.yml" ] || [ -f ".swiftlint.yaml" ]; then
swiftlint lint --quiet <changed_files>
fi
Rules:
- If SwiftLint passes for a specific rule, DO NOT flag that issue manually
- SwiftLint configuration is authoritative for style rules
- Only flag issues that linters cannot detect (semantic issues, architectural problems)
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.
- 1mo ago First seen · 258 lines · 16 tokens per session scan A 620c03f9841c
review-ios is a skill published in the GitHub repository existential-birds/beagle (82 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 16 tokens to every session and 2,484 once invoked, about $0.0001 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 2026-09-16.
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