[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"skill:01M7EB31DJX4XRXAXES3G6XMPR":3,"skill-same:01M7EB31DJX4XRXAXES3G6XMPR":43},{"skillNo":4,"name":5,"nameZh":6,"description":7,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":6,"repositoryNo":12,"starsCount":13,"licenseSpdxId":14,"licenseFileUrl":6,"sourceHtmlUrl":15,"categories":16,"keywords":17,"publishedAt":18,"linkOnly":19,"markdownContent":20,"markdownBody":21,"frontMatter":22,"refName":24,"commitSha":25,"skillDirectory":26,"forksCount":13,"repositoryHtmlUrl":27,"repositoryHomepageUrl":6,"ownerHtmlUrl":28,"ownerBlogUrl":6,"ownerDescription":6,"updatedAt":29,"install":30,"resources":42},"01M7EB31DJX4XRXAXES3G6XMPR","principle-separate-before-serializing-shared-state",null,"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.","knowttl\u002Fbstack","knowttl","https:\u002F\u002Favatars.githubusercontent.com\u002Fu\u002F190909824?v=4","01M7EAVH45A8N0D457MF3F8Y8N","01M7EAVH51BVBHN175WKB1DAPY",0,"MIT","https:\u002F\u002Fgithub.com\u002Fknowttl\u002Fbstack\u002Fblob\u002Fmain\u002Fupstream\u002Fpstack\u002Fpstack\u002Fskills\u002Fprinciple-separate-before-serializing-shared-state\u002FSKILL.md",[],[],"2026-11-15 14:19:17",false,"---\nname: principle-separate-before-serializing-shared-state\ndescription: \"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.\"\ndisable-model-invocation: true\n---\n\n# Separate Before Serializing Shared State\n\nWhen 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.\n\n**Why:** Concurrent writes to shared state create race conditions that are intermittent, hard to reproduce, and expensive to debug.\n\n**Pattern:**\n1. **Identify shared mutable state** (files both read and write, branches both push to, APIs both define and consume).\n2. **Default: eliminate the shared write target.** Ask: do these actors need one canonical object, or are they publishing independent facts? Give each actor its own owned file, key, branch, or state directory, and merge only at the read\u002Freporting boundary. Two workers writing their own `lastX` field into one `state.json` is still shared mutation. `indexer-state.json` + `metrics-state.json` is not.\n3. **Only when one shared write target is a real invariant, serialize access structurally** (lockfiles, sequential phases, single-writer actor, or atomic compare-and-swap). Treat \"we need a lock\" as a design smell to check, not as the default answer.\n","# Separate Before Serializing Shared State\n\nWhen 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.\n\n**Why:** Concurrent writes to shared state create race conditions that are intermittent, hard to reproduce, and expensive to debug.\n\n**Pattern:**\n1. **Identify shared mutable state** (files both read and write, branches both push to, APIs both define and consume).\n2. **Default: eliminate the shared write target.** Ask: do these actors need one canonical object, or are they publishing independent facts? Give each actor its own owned file, key, branch, or state directory, and merge only at the read\u002Freporting boundary. Two workers writing their own `lastX` field into one `state.json` is still shared mutation. `indexer-state.json` + `metrics-state.json` is not.\n3. **Only when one shared write target is a real invariant, serialize access structurally** (lockfiles, sequential phases, single-writer actor, or atomic compare-and-swap). Treat \"we need a lock\" as a design smell to check, not as the default answer.\n",{"name":5,"description":7,"disable-model-invocation":23},true,"main","731d59d74f9a92ea606abe1b5c7dbec3f6eb1104","upstream\u002Fpstack\u002Fpstack\u002Fskills\u002Fprinciple-separate-before-serializing-shared-state","https:\u002F\u002Fgithub.com\u002Fknowttl\u002Fbstack","https:\u002F\u002Fgithub.com\u002Fknowttl","2026-11-15 07:36:30",{"source":8,"skillName":5,"commands":31,"prompt":41,"zipAvailable":23},[32,35,38],{"tool":33,"command":34},"npx","npx skills add knowttl\u002Fbstack --skill principle-separate-before-serializing-shared-state",{"tool":36,"command":37},"bunx","bunx skills add knowttl\u002Fbstack --skill principle-separate-before-serializing-shared-state",{"tool":39,"command":40},"pnpm","pnpm dlx skills add knowttl\u002Fbstack --skill principle-separate-before-serializing-shared-state","安装技能，技能地址：https:\u002F\u002Fgithub.com\u002Fknowttl\u002Fbstack\u002Fblob\u002Fmain\u002Fupstream\u002Fpstack\u002Fpstack\u002Fskills\u002Fprinciple-separate-before-serializing-shared-state\u002FSKILL.md",[],[44,51,58,65,72,79],{"skillNo":45,"name":46,"nameZh":6,"description":47,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":6,"repositoryNo":12,"starsCount":13,"licenseSpdxId":14,"licenseFileUrl":6,"sourceHtmlUrl":48,"categories":49,"keywords":50,"publishedAt":18},"01M7EB391NDZSYCJ9CTJ3VNC1S","vision","Draft and stress-test a VISION.md for a repository, then iterate with the author on an interactive review board until approved. Use on \u002Fvision or when asked to create or refine a project vision.","https:\u002F\u002Fgithub.com\u002Fknowttl\u002Fbstack\u002Fblob\u002Fmain\u002Fupstream\u002Fvision\u002Fskills\u002Fvision\u002FSKILL.md",[],[],{"skillNo":52,"name":53,"nameZh":6,"description":54,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":6,"repositoryNo":12,"starsCount":13,"licenseSpdxId":14,"licenseFileUrl":6,"sourceHtmlUrl":55,"categories":56,"keywords":57,"publishedAt":18},"01M7EB35262G99XXG48461E4FC","principle-sequence-verifiable-units","Apply to multi-step work (sweeps, migrations, runs of similar edits) and to how you stack commits and PRs. Break work into small units that each end in a verifiable state, check each before the next, and order delivery so the sequence proves itself to a reviewer.","https:\u002F\u002Fgithub.com\u002Fknowttl\u002Fbstack\u002Fblob\u002Fmain\u002Fupstream\u002Fpstack\u002Fpstack\u002Fskills\u002Fprinciple-sequence-verifiable-units\u002FSKILL.md",[],[],{"skillNo":59,"name":60,"nameZh":6,"description":61,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":6,"repositoryNo":12,"starsCount":13,"licenseSpdxId":14,"licenseFileUrl":6,"sourceHtmlUrl":62,"categories":63,"keywords":64,"publishedAt":18},"01M7EB2YZQCT7EKH3MK9YRT47J","principle-model-the-domain","Apply when writing stateful logic, or when code branches a lot or repeats a shape assumption across files.","https:\u002F\u002Fgithub.com\u002Fknowttl\u002Fbstack\u002Fblob\u002Fmain\u002Fupstream\u002Fpstack\u002Fpstack\u002Fskills\u002Fprinciple-model-the-domain\u002FSKILL.md",[],[],{"skillNo":66,"name":67,"nameZh":6,"description":68,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":6,"repositoryNo":12,"starsCount":13,"licenseSpdxId":14,"licenseFileUrl":6,"sourceHtmlUrl":69,"categories":70,"keywords":71,"publishedAt":18},"01M7EB2SRZBFMDPVFXHSMFY0QS","principle-minimize-reader-load","Apply when reviewing or shaping code that's hard to trace. Count layers between question and answer, and hidden state in the reader's head; collapse one-caller wrappers and shrink mutable scope.","https:\u002F\u002Fgithub.com\u002Fknowttl\u002Fbstack\u002Fblob\u002Fmain\u002Fupstream\u002Fpstack\u002Fpstack\u002Fskills\u002Fprinciple-minimize-reader-load\u002FSKILL.md",[],[],{"skillNo":73,"name":74,"nameZh":6,"description":75,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":6,"repositoryNo":12,"starsCount":13,"licenseSpdxId":14,"licenseFileUrl":6,"sourceHtmlUrl":76,"categories":77,"keywords":78,"publishedAt":18},"01M7EB2PG2M04BXCN1JD77SVGC","principle-encode-lessons-in-structure","Apply when you catch yourself writing the same instruction a second time, or notice a recurring correction. Encode the rule as a lint, metadata flag, runtime check, or script instead of more text.","https:\u002F\u002Fgithub.com\u002Fknowttl\u002Fbstack\u002Fblob\u002Fmain\u002Fupstream\u002Fpstack\u002Fpstack\u002Fskills\u002Fprinciple-encode-lessons-in-structure\u002FSKILL.md",[],[],{"skillNo":80,"name":81,"nameZh":6,"description":82,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":6,"repositoryNo":12,"starsCount":13,"licenseSpdxId":14,"licenseFileUrl":6,"sourceHtmlUrl":83,"categories":84,"keywords":85,"publishedAt":18},"01M7EB2JZDKXXBTVYAJ1FMYHD8","principle-build-the-lever","Apply to any non-trivial work, not just bulk work: edits, migrations, analyses, checks. Build the tool that does it or proves it (codemod, script, generator, or a skill your subagents follow) instead of working by hand. The tool is the artifact a reviewer can rerun.","https:\u002F\u002Fgithub.com\u002Fknowttl\u002Fbstack\u002Fblob\u002Fmain\u002Fupstream\u002Fpstack\u002Fpstack\u002Fskills\u002Fprinciple-build-the-lever\u002FSKILL.md",[],[]]