api-and-interface-design
Skill0 starsChanged 3 months agoMITView on GitHub
Contract-first API design. See description.
72 other projects use a version of this.
Adopted by
Most recently taken up by
- ishandutta2007/Awesome-Agent-Skillstheir own version, first seen Nov 8, 2026
- DnsQueen/orcinus-skillstheir own version, first seen Nov 8, 2026
- TheAstroByte/astrobyte-agent-skillstheir own version, first seen Nov 8, 2026
- MMACABRE/SKILLStheir own version, first seen Nov 8, 2026
- steven123397/nexuskit-skillstheir own version, first seen Nov 1, 2026
- AgnesAI-Labs/agnet-skills-cntheir own version, first seen Nov 1, 2026
Used with
Projects with it also use constraint-driven-development, deprecation-and-migration and 7 more.
Other files people use alongside this one.
Files found in the same public projects as a version of this one, more often than they turn up anywhere else. Each project counts once, large collections count for less, and this file's own repository is left out.
MrCipherSmithSkillconstraint-driven-development
Use when a project needs a persistent, measurable quality bar — starting a project without documented standards, 'set up constraints', or when coverage/perf/a11y thresholds get re-debated per-PR. Produces CONSTRAINTS.md with enforceable numbers, ratchets, and a guard against silent weakening. NOT for throwaway prototypes or a one-off CI setup.
Also in 17 projects that use this
HK-hubSkilldeprecation-and-migration
Manages deprecation and migration. Use when removing old systems, APIs, or features. Use when migrating users from one implementation to another. Use when deciding whether to maintain or sunset existing code.
Also in 40 projects that use this
HK-hubSkillcode-simplification
Simplifies code for clarity. Use when refactoring code for clarity without changing behavior. Use when code works but is harder to read, maintain, or extend than it should be. Use when reviewing code that has accumulated unnecessary complexity.
Also in 52 projects that use this
skytiger6724Skillbrainstorm-experiments-existing
Design experiments to test assumptions for an existing product — prototypes, A/B tests, spikes, and other low-effort validation methods. Use when validating assumptions, testing feature ideas cheaply, or planning product experiments.
Also in 4 projects that use this
skytiger6724Skillprioritize-assumptions
Prioritize assumptions using an Impact × Risk matrix and suggest experiments for each. Use when triaging a list of assumptions, deciding what to test first, or applying the assumption prioritization canvas.
Also in 4 projects that use this
45ckSkillpestle-analysis
Also in 4 projects that use this
- +2 more from skytiger6724
Other versions72 projects use a version of this.
Word for word · 0
None found.
Edited · 0
None found.
Wrote their own version · 72
- addyosmani/agent-skills★ 114ksame name
- ollaya-dev/ollaya★ 1.4ksame name
- shashankswe2020-ux/whoop-mcp★ 174same name
- drvoss/everything-copilot-cli★ 48same name
- vinvcn/addyosmani-agent-skills-zh★ 46same name
- jmxt3/gitscape.ai★ 33same name
- sampleXbro/agentsmesh★ 27same name
- jaskirat1616/grok-skills★ 22same name
- ishandutta2007/Awesome-Agent-Skills★ 21same name
- JPeetz/agent-skills★ 14same name
62 more not listed
How matches are found. Word for word: the exact same text. Edited: shares passages with this file (“99% same” means 99% of its five-word phrases also appear here; 10% or more counts). Their own version: similar meaning, or, weakest, the same name. We can’t tell which project had it first. Projects are counted among the 200 most-starred candidates, and mentions are links to the repository we found, up to 50 per site, so both counts are a floor.
In this repository64 other files it gives its agents.
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- frontend-designSkill
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- documentation-and-adrsSkill
- readme-generationSkill
- accessibilitySkill
- adverse-reviewSkill
- aeoSkill
- agent-designerSkill
- best-practicesSkill
- browser-testing-with-devtoolsSkill
- canvas-designSkill
- ceo-advisorSkill
- ci-cd-and-automationSkill
- content-creatorSkill
- context-engineeringSkill
- create-voltagentSkill
- cto-advisorSkill
- deep-researchSkill
- doubt-driven-developmentSkill
- frontend-ui-engineeringSkill
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- iso27001Skill
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- performanceSkill
- planning-and-task-breakdownSkill
- product-manager-toolkitSkill
- research-orchestratorSkill
- saas-metrics-coachSkill
- seoSkill
- soc2Skill
- source-driven-developmentSkill
- spec-driven-developmentSkill
- tech-debt-trackerSkill
- voltagent-best-practicesSkill
- voltagent-core-referenceSkill
- voltagent-docs-bundleSkill
- web-quality-auditSkill
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- writing-skillsSkill
- core-web-vitalsSkill
- performance-optimizationSkill
- context-compressionSkill
- prompt-enhancementSkill
- token-efficiencySkill
- systematic-debuggingSkill
- test-driven-developmentSkill
- verification-before-completionSkill
- receiving-code-reviewSkill
- requesting-code-reviewSkill
- security-and-hardeningSkill
- brainstormingSkill
- The first 60 shown.
The file
We split this skill into the rules it gives an agent
2 rules. 0 are common, 2 are distinctive, and 0 are very specific to this project.
0
Common
Most of the 67 edited versions we read keep these.
2
Distinctive
This author's own choices. Worth a look.
0
Very specific
Tied to their project's names, files or tools. Probably skip.
- Common
- Distinctive
- Very specific
- Distinctive: line 17
Follow the source skill steps for this domain.
- Distinctive: line 18
Verify output and commit.
“Common” is measured: kept by at least 6 in 10 of the 67 edited versions of this file we could read. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.
Files
api-and-interface-design
Contract-first API design.
When to use
See description.
Workflow
- Understand the task and check project context.
- Follow the source skill steps for this domain.
- Verify output and commit.
Verification
- Task completed per source skill checklist
- Tests pass and no regressions
References
- Source: upstream composite
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Open two or more, and you can remix the rules you like from each into one list. Kept in this browser only.
Now do this for your own.
Bring your CLAUDE.md, AGENTS.md or skills. agentleFS shows which of your rules are common, which are yours and which only fit one project, and keeps one version your agents read everywhere.

