Swift Concurrency 6 2
affaan-m/ECC
Swift 6.2 Approachable Concurrency — single-threaded by default, @concurrent for explicit background offloading, isolated conformances for main actor types.
Apply when concurrent actors might write to the same file, branch, key, or state object.
OfficialNo licenceAuto-check passed
Install Principle Separate Before Serializing Shared State
$ npx skills add cursor/plugins --skill principle-separate-before-serializing-shared-state -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install cursor/plugins principle-separate-before-serializing-shared-state --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/cursor/plugins.git skills-src && mkdir -p .claude/skills && cp -r skills-src/pstack/skills/principle-separate-before-serializing-shared-state .claude/skills/principle-separate-before-serializing-shared-state && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "principle-separate-before-serializing-shared-state" agent skill from https://github.com/cursor/plugins/tree/main/pstack/skills/principle-separate-before-serializing-shared-state into .claude/skills/principle-separate-before-serializing-shared-state/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "principle-separate-before-serializing-shared-state", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/cursor/plugins/tree/main/pstack/skills/principle-separate-before-serializing-shared-stateType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add cursor/plugins --skill principle-separate-before-serializing-shared-state -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install cursor/plugins principle-separate-before-serializing-shared-state --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/cursor/plugins.git skills-src && mkdir -p .agents/skills && cp -r skills-src/pstack/skills/principle-separate-before-serializing-shared-state .agents/skills/principle-separate-before-serializing-shared-state && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "principle-separate-before-serializing-shared-state" agent skill from https://github.com/cursor/plugins/tree/main/pstack/skills/principle-separate-before-serializing-shared-state into .agents/skills/principle-separate-before-serializing-shared-state/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "principle-separate-before-serializing-shared-state", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add cursor/plugins --skill principle-separate-before-serializing-shared-state -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install cursor/plugins principle-separate-before-serializing-shared-state --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/cursor/plugins.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/pstack/skills/principle-separate-before-serializing-shared-state .cursor/skills/principle-separate-before-serializing-shared-state && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "principle-separate-before-serializing-shared-state" agent skill from https://github.com/cursor/plugins/tree/main/pstack/skills/principle-separate-before-serializing-shared-state into .cursor/skills/principle-separate-before-serializing-shared-state/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "principle-separate-before-serializing-shared-state", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/cursor/plugins.git --path pstack/skills/principle-separate-before-serializing-shared-state--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add cursor/plugins --skill principle-separate-before-serializing-shared-state -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install cursor/plugins principle-separate-before-serializing-shared-state --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/cursor/plugins.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/pstack/skills/principle-separate-before-serializing-shared-state .gemini/skills/principle-separate-before-serializing-shared-state && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "principle-separate-before-serializing-shared-state" agent skill from https://github.com/cursor/plugins/tree/main/pstack/skills/principle-separate-before-serializing-shared-state into .gemini/skills/principle-separate-before-serializing-shared-state/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "principle-separate-before-serializing-shared-state", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install cursor/plugins principle-separate-before-serializing-shared-stateInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add cursor/plugins --skill principle-separate-before-serializing-shared-state -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/cursor/plugins.git skills-src && mkdir -p .github/skills && cp -r skills-src/pstack/skills/principle-separate-before-serializing-shared-state .github/skills/principle-separate-before-serializing-shared-state && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "principle-separate-before-serializing-shared-state" agent skill from https://github.com/cursor/plugins/tree/main/pstack/skills/principle-separate-before-serializing-shared-state into .github/skills/principle-separate-before-serializing-shared-state/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "principle-separate-before-serializing-shared-state", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add cursor/plugins --skill principle-separate-before-serializing-shared-state -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install cursor/plugins principle-separate-before-serializing-shared-state --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/cursor/plugins.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/pstack/skills/principle-separate-before-serializing-shared-state .opencode/skills/principle-separate-before-serializing-shared-state && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "principle-separate-before-serializing-shared-state" agent skill from https://github.com/cursor/plugins/tree/main/pstack/skills/principle-separate-before-serializing-shared-state into .opencode/skills/principle-separate-before-serializing-shared-state/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "principle-separate-before-serializing-shared-state", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
principle-separate-before-serializing-shared-state- GitHub stars
- 10k
- Used in
- 8 other repos
- Token cost
- ~392 tokens
- SKILL.md length
- 180 words
- Files
- 1
- Skills in repo
- 99
- Repo updated
- First seen
- Licence
- None found
At a glance
Apply when concurrent actors might write to the same file, branch, key, or state object.
- Works in 3 steps: Identify shared mutable state (files… → Default: eliminate the shared write… → Only when one shared write target is a…
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Principle Separate Before Serializing Shared State is an agent skill from cursor/plugins, published by the product's own GitHub organization. Apply when concurrent actors might write to the same file, branch, key, or state object. Eliminate the sharing first; serialize structurally only when one shared writer is a real invariant.
Its SKILL.md is about 390 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
The repository describes itself as: Cursor plugin specification and official plugins.
Example prompts
- “/principle-separate-before-serializing-shared-state”
Workflow steps
3 steps, taken from the first numbered list in SKILL.md.
- Identify shared mutable state (files both read and write, branches both push to, APIs both define and consume).
- Default: eliminate the shared write target. Ask: do these actors need one canonical object, or are they publishing independent facts? Give…
- Only when one shared write target is a real invariant, serialize access structurally (lockfiles, sequential phases, single-writer actor…
What it can do on your machine
Read from SKILL.md and the folder at commit 9f451cf. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Principle Separate Before Serializing Shared State loads about 392 tokens when it runs. Until then it costs about 60 tokens; SKILL.md has 180 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Without a licence we can't republish the file, so here is its outline and opening line. It has 180 words (~392 tokens).
“When concurrent actors might share mutable state, first ask whether they need the same mutable object. If not, eliminate the sharing. When sharing is real, enforce serialization structurally: lockfiles, sequential phases, exclusive ownership. Instructions and conventions are not concurrency control.”
- name
- principle-separate-before-serializing-shared-state
- disable-model-invocation
- true
Files
Just SKILL.md in pstack/skills/principle-separate-before-serializing-shared-state of cursor/plugins.
Open the folder on GitHubat commit 9f451cf
Used in 8 other repositories
We found 8 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 8 other GitHub owners. This page covers the copy in cursor/plugins, which our catalogue first saw on October 7, 2026.
- chmonitor/chmonitor.claude/skills/pstack/upstream/skills/principle-separate-before-serializing-shared-state
- Sma1lboy/rove.agents/skills/pstack/skills/principle-separate-before-serializing-shared-state
- michael-denyer/pstack-claudeplugins/pstack/skills/principle-separate-before-serializing-shared-state
- backnotprop/pstackskills/principle-separate-before-serializing-shared-state
- tellahq/opensession.agents/skills/pstack-suite/skills/principle-separate-before-serializing-shared-state
- am-will/gooey-pi.agents/skills/pstack/principle-separate-before-serializing-shared-state
- jtaroreh/agystackskills/principle-separate-before-serializing-shared-state
- uzairansaruzi/p3-stackskills/principle-separate-before-serializing-shared-state
Compare with similar skills
Principle Separate Before Serializing Shared State next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Principle Separate Before Serializing Shared State this skillcursor/plugins | 10k | 8 repos | ~392 | Automated safety check: Pass | None | |
| Swift Concurrency 6 2affaan-m/ECC | 274k | 4 repos | ~2k | Automated safety check: Pass | MIT | |
| Swift Concurrency 6 2affaan-m/ECC | 274k | 3 repos | ~1.4k | Automated safety check: Pass | MIT | |
| Swift Actor Persistenceaffaan-m/ECC | 274k | 3 repos | ~871 | Automated safety check: Pass | MIT | |
| Swift Actor Persistenceaffaan-m/ECC | 274k | 4 repos | ~1.2k | Automated safety check: Pass | MIT | |
| Swift Concurrency Expertdavila7/claude-code-templates | 32k | 3 repos | ~1.1k | Automated safety check: Pass | MIT |
Similar skills
Swift Concurrency 6 2
affaan-m/ECC
Swift 6.2 可接近的并发性 — 默认单线程，@concurrent 用于显式后台卸载，隔离一致性用于主 actor 类型。
Swift Actor Persistence
affaan-m/ECC
在 Swift 中使用 actor 实现线程安全的数据持久化——基于内存缓存与文件支持的存储，通过设计消除数据竞争. An agent skill from affaan-m/ECC.
Swift Actor Persistence
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Thread-safe data persistence in Swift using actors — in-memory cache with file-backed storage, eliminating data races by design.
Swift Concurrency Expert
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Review and fix Swift concurrency issues such as actor isolation and Sendable violations.
Apify Actorization
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Actorization converts existing software into reusable serverless applications compatible with the Apify platform.
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Questions about Principle Separate Before Serializing Shared State
What does Principle Separate Before Serializing Shared State do?
Apply when concurrent actors might write to the same file, branch, key, or state object. Principle Separate Before Serializing Shared State is an agent skill from cursor/plugins, published by the product's own GitHub organization. Apply when concurrent actors might write to the same file, branch, key, or state object.
How do I install Principle Separate Before Serializing Shared State in Claude Code?
Run `npx skills add cursor/plugins --skill principle-separate-before-serializing-shared-state -a claude-code`. Or copy the skill folder (pstack/skills/principle-separate-before-serializing-shared-state in cursor/plugins) into .claude/skills/principle-separate-before-serializing-shared-state in your project. Claude Code loads it when a task matches its description.
How do I install Principle Separate Before Serializing Shared State in Codex?
Run `npx skills add cursor/plugins --skill principle-separate-before-serializing-shared-state -a codex`. Or copy the skill folder (pstack/skills/principle-separate-before-serializing-shared-state in cursor/plugins) into .agents/skills/principle-separate-before-serializing-shared-state in your project. Codex loads it when a task matches its description.
Can I use Principle Separate Before Serializing Shared State in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add cursor/plugins --skill principle-separate-before-serializing-shared-state -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/principle-separate-before-serializing-shared-state, .gemini/skills/principle-separate-before-serializing-shared-state, .github/skills/principle-separate-before-serializing-shared-state and .opencode/skills/principle-separate-before-serializing-shared-state in your project.
What does Principle Separate Before Serializing Shared State need to run?
SKILL.md names no scripts, command-line tools or credentials: Principle Separate Before Serializing Shared State is instructions for the agent only.
Does Principle Separate Before Serializing Shared State access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Principle Separate Before Serializing Shared State safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Principle Separate Before Serializing Shared State use?
No licence was found for Principle Separate Before Serializing Shared State or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Principle Separate Before Serializing Shared State use?
About 392 tokens (SKILL.md is roughly 1.6k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Principle Separate Before Serializing Shared State?
Skills that share tags, products or a category with Principle Separate Before Serializing Shared State: Swift Concurrency 6 2 (affaan-m/ECC, 274k stars), Swift Concurrency 6 2 (affaan-m/ECC, 274k stars), Swift Actor Persistence (affaan-m/ECC, 274k stars) and Swift Actor Persistence (affaan-m/ECC, 274k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Principle Separate Before Serializing Shared State?
cursor (a GitHub organization, an official publisher) maintains it in cursor/plugins, which has 10,130 GitHub stars. The repository holds 99 skills in this directory. The repository was last updated on October 6, 2026.
Source: cursor/plugins on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.