generate-stack-hash

name	generate-stack-hash
description	Generate a one-line, similarity-preserving Stack Descriptor Hash (SDH) for a repository. Clones the repo, runs the Ivy.StackAnalyzer CLI to get a factual stack report, then maps it to the canonical hash. Use when the user types /generate-stack-hash <repo-url> or asks for a stack hash / stack signature of a repo.
argument-hint	<repo-url>

/generate-stack-hash

Produce a single-line Stack Descriptor Hash (SDH) for a repository: a canonical, human-readable string capturing the significant layers, the frameworks that build each layer, and the test technology. Same repo → identical hash; similar stacks → similar strings.

The repository URL is: $ARGUMENTS

If $ARGUMENTS is empty, ask the user for a repo URL and stop.

1. Get the repo under D:\Temp\

• Folder name = the URL's last path segment minus any .git.
• If D:\Temp\<name> already exists, reuse it. Otherwise shallow-clone: git clone --depth 1 <repo-url> "D:/Temp/<name>"
• On clone failure (bad URL/auth/network): report and stop.

2. Run the analyzer (this is the hash input)

From this repository's root (D:\Repos\_Ivy\Ivy-Stack-Analyzer):

dotnet run --project src/Ivy.StackAnalyzer.Console -- "D:/Temp/<name>" -o yaml

Read the report. The parts that matter for the hash are:

• components[] — each with relativePath, languages, technologies (name + category), and the isAuxiliary / isWorkspaceRoot flags.
• top-level technologies[] and languages[], and infrastructure[].

Ignore components flagged isAuxiliary: true and pure workspace-root aggregators. Use each component's dominant language + its framework/orm/ database/styling/testing-category technologies.

Ignore any technology with confidence: low — these are weak signals (e.g. env-var placeholders from .env.example) and must never enter the hash.

Note: the analyzer applies supersedes, so a base framework may be hidden by its meta-framework (e.g. it reports Next.js but not React). When deriving the hash you must still emit the base per Rule 4 below (react+next).

3. Derive the hash (apply the SDH spec exactly)

You convert the report into ONE line. It is deterministic and similarity-preserving. The output contains no spaces anywhere.

Grammar

hash    = segment ( "|" segment )*
segment = role [ "(" lang ")" ] ":" token ( "+" token )*
role    = "fe" | "mobile" | "desktop" | "be" | "fs" | "lib" | "db" | "infra" | "test"
lang    = canonical language slug (omit for db/infra/test)
token   = canonical technology slug

Rule 1 — Fixed layer order (omit absent layers)

fe, mobile, desktop, be, fs, lib, db, infra, test

Use fs only when a single framework genuinely spans client+server (Rails, Laravel, Django MVC, Phoenix, Blazor Server, full-stack Next.js); otherwise split into fe+be. Use lib for a library/SDK/CLI repo with no app layer.

Rule 2 — Significance: defining tech only (drop incidental libs)

Cap each layer to these slots (fewer is fine); the slot order is also the token order:

role	slots → tokens
fe	ui-framework, meta-framework/builder, styling-system
mobile	framework
desktop	framework
be	web-framework, orm
fs	framework, orm
lib	(none — language only)
db	engines (most-central first)
infra	container/orchestration/iac
test	test frameworks

Drop icon sets, validation, state, routers, component kits, loggers, monitoring, analytics, CI providers, hosting brands.

db corroboration: include a db token only when it is backed by a real driver dependency (e.g. psycopg, pg, mongoose, redis client), a compose / infrastructure service, or a high-confidence database detection. Never add a db token from an env-var placeholder or a default cache-driver config alone.

Rule 3 — Token order (the similarity engine)

1. Order by the slot order above (primary/base technology first).
2. Within the same slot, alphabetical.
3. db and test: alphabetical (no primary).

Rule 4 — Base before meta

A meta-framework implies and is preceded by its base, both included: react+next, react+remix, react+gatsby, vue+nuxt, svelte+sveltekit, solid+solidstart, reactnative+expo. (Emit the base even when the analyzer omitted it via supersedes.)

Rule 5 — Normalize to canonical slugs

Lowercase, drop version, remove all non-alphanumeric chars, then apply synonyms (generalize by analogy):

• Frameworks: Next.js→next, Nuxt→nuxt, SvelteKit→sveltekit, ASP.NET Core→aspnetcore, Entity Framework Core→efcore, React Native→reactnative, Spring Boot→spring, Ruby on Rails→rails, Express→express, NestJS→nestjs, Tailwind CSS→tailwind.
• Languages: TypeScript→ts, JavaScript→js, Python→py, Ruby→rb, Go→go, Rust→rs, Java→java, Kotlin→kt, C#→cs, PHP→php, Swift→swift, Dart→dart, Elixir→ex.
• DB: PostgreSQL→postgres, MySQL→mysql, MongoDB→mongodb, SQL Server→mssql, Redis→redis, SQLite→sqlite.

Rule 6 — Test layer

Collect significant test frameworks across all layers into ONE trailing test: segment, alphabetical, deduped. Omit if none.

Rule 7 — Multiplicity & determinism

One segment per role. Multiple frontends/backends → merge significant tokens (deduped, ordered by Rules 3–4). Skip example/fixture/sample/docs/tooling components. Never emit versions, counts, paths, or spaces. Same input → identical output.

Reference examples

fe(ts):react+next+tailwind|be(py):fastapi+sqlmodel|db:postgres|test:playwright+pytest
fe(ts):react+vite+tailwind|be(py):fastapi|db:postgres+redis|test:vitest
fs(py):django|db:postgres|test:pytest
fe(cs):blazor|be(cs):aspnetcore+efcore|db:mssql|test:xunit
be(go):gin+gorm|db:postgres
mobile(dart):flutter|db:firebase
lib(py)|test:pytest

4. Report back

Output, in this order:

1. The hash on its own line in a fenced code block.
2. A short bullet mapping (one line per segment) showing which component(s) and evidence produced it, so the user can sanity-check.

Self-check before answering: segments in Rule-1 order; absent layers omitted; only defining tokens, ordered by Rules 3–4 (base before meta); all slugs normalized; one alphabetical test: segment or none; no spaces anywhere.