Borrowing it
Nothing to install: this file belongs to repoprompt/repoprompt-ce. 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/repoprompt/repoprompt-ce/main/.agents/skills/rpce-swift-6-concurrency-migration/SKILL.mdgit clone --depth 1 https://github.com/repoprompt/repoprompt-ceWrote 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/repoprompt/repoprompt-ce/rpce-swift-6-concurrency-migration)<a href="https://agentmods.dev/skills/repoprompt/repoprompt-ce/rpce-swift-6-concurrency-migration"><img src="https://agentmods.dev/badge/skills/repoprompt/repoprompt-ce/rpce-swift-6-concurrency-migration/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/repoprompt/repoprompt-ce/rpce-swift-6-concurrency-migration"><img src="https://agentmods.dev/badge/skills/repoprompt/repoprompt-ce/rpce-swift-6-concurrency-migration.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00090 | $0.01373 |
| Opus 5 | $0.00045 | $0.00687 |
| Sonnet 5 | $0.00018 | $0.00275 |
| Haiku 4.5 | $0.00009 | $0.00137 |
Grade A, and why
rpce-swift-6-concurrency-migration 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 11d 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 — 121 lines — stays where its author put it; the contents beside it link to each section on GitHub.
RepoPrompt CE Swift 6.2 Concurrency Migration
Treat repository source, current compiler output, AGENTS.md, and official Swift documentation as authority. Do not infer language semantics from the toolchain version alone.
Required reading
Read references/repository-concurrency-profile.md first. Load the other references only when the workflow reaches them:
references/official-swift-6-2.mdbefore interpreting or changing language/concurrency settings;references/swiftpm-settings-samples.mdbefore editing either package manifest or designing a settings rollout;references/swift-6-2-semantics-samples.mdbefore adopting or diagnosing caller-actor execution,@concurrent, default isolation, or isolated conformances;references/migration-inventory.mdwhen creating or updating the campaign inventory;references/validation-matrix.mdbefore starting coordinated validation.
Re-read an affected section before a settings change if the information is no longer fresh in context.
Workflow
1. Establish the current state
- Confirm the active Xcode and Swift compiler versions.
- Inspect both package manifests and the actual settings of every affected target.
- Distinguish the Swift tools version, language mode, strict-concurrency checking, default actor isolation, and upcoming concurrency features.
- Capture a clean coordinated baseline before changing semantics.
- Record pre-existing warnings or failures separately from migration diagnostics.
Never assume that using a Swift 6.2 compiler means the package is in Swift 6 language mode.
2. Build the inventory
Create or update a migration inventory using references/migration-inventory.md. Group findings by package, target, diagnostic family, isolation boundary, runtime risk, and dependency relationship.
Inventory at least:
- global and static mutable state;
@unchecked Sendable,nonisolated(unsafe),@preconcurrency, andMainActor.assumeIsolated;- detached or escaping tasks and their owners;
- continuations, streams, and cancellation handlers;
- locks, queues, semaphores, and custom concurrency primitives;
- actor reentrancy-sensitive state;
- Objective-C/C and delegate/callback boundaries;
- long-lived Agent Mode, MCP, indexing, persistence, and process tasks.
What ships with it
7 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.
- 11d ago First seen · 121 lines · 90 tokens per session scan A f17d5949f868
rpce-swift-6-concurrency-migration is a skill published in the GitHub repository repoprompt/repoprompt-ce (927 stars, last pushed today), licensed Apache-2.0. It adds 90 tokens to every session and 1,373 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 2026-08-30.
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