1.Fission-AI / OpenSpec
Spec-driven development (SDD) for AI coding assistants.
+2,827 stars
from 70,787 · score 7.95
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Ranked by Attention Score: stars gained over the last 30 complete days
17 repositories by Attention Score · Oct 4, 2026 – Nov 2, 2026 (UTC)
2.yonaskolb / XcodeGen
A Swift command line tool for generating your Xcode project
+102 stars
from 8,813 · score 4.63
3.cloudevents / spec
CloudEvents Specification
+30 stars
from 5,916 · score 3.43
4.standard-webhooks / standard-webhooks
The Standard Webhooks specification
+30 stars
from 1,756 · score 3.43
5.asyncapi / spec
The AsyncAPI specification allows you to create machine-readable definitions of your asynchronous APIs.
+27 stars
from 5,306 · score 3.33
6.CesiumGS / 3d-tiles
Specification for streaming massive heterogeneous 3D geospatial datasets :earth_americas:
+25 stars
from 2,611 · score 3.26
7.denysdovhan / wtfjs
🤪 A list of funny and tricky JavaScript examples
+23 stars
from 37,663 · score 3.18
8.tc39 / proposals
Tracking ECMAScript Proposals
+23 stars
from 19,179 · score 3.18
9.WebAssembly / spec
WebAssembly specification, reference interpreter, and test suite.
+11 stars
from 3,457 · score 2.48
10.projectfluent / fluent
Fluent — planning, spec and documentation
+10 stars
from 1,679 · score 2.40
11.fantasyland / fantasy-land
Specification for interoperability of common algebraic structures in JavaScript
+9 stars
from 10,235 · score 2.30
12.estree / estree
The ESTree Spec
+8 stars
from 5,430 · score 2.20
13.adrg / xdg
Go implementation of the XDG Base Directory Specification and XDG user directories
+3 stars
from 1,021 · score 1.39
14.Esri / i3s-spec
This repository hosts the specification for Scene Layers which are containers for arbitrarily large amounts of geographic data. The delivery and persistence model for Scene Layers, referred to as Indexed 3d Scene Layer (I3S) and Scene Layer Package (SLPK) respectively, are specified.
+3 stars
from 337 · score 1.39
15.biolink / biolink-model
Schema and generated objects for biolink data model and upper ontology
+2 stars
from 265 · score 1.10
16.Esri / cim-spec
This repository hosts the specification for the Cartographic Information Model
+2 stars
from 94 · score 1.10
17.etorreborre / specs2
Software Specifications for Scala
+1 stars
from 734 · score 0.69