@@ -0,0 +1,85 @@
+import { describe, expect } from 'vitest'
+
+import constants, {
+  FLAG_CONFIG,
+  FLAG_DRY_RUN,
+  FLAG_HELP,
+} from '../../../src/constants.mts'
+import { cmdit, spawnSocketCli } from '../../../test/utils.mts'
+
+describe('socket manifest dotnet', async () => {
+  const { binCliPath } = constants
+
+  cmdit(
+    ['manifest', 'dotnet', FLAG_HELP, FLAG_CONFIG, '{}'],
+    `should support ${FLAG_HELP}`,
+    async cmd => {
+      const { code, stderr, stdout } = await spawnSocketCli(binCliPath, cmd)
+      expect(stdout).toMatchInlineSnapshot(`
+        "[beta] Generate Socket facts files from .NET solutions and projects
+
+          Usage
+            $ socket manifest dotnet [options] [CWD=.|FILE]
+
+          Options
+            --bin               Location of the dotnet binary to use, default: dotnet on PATH
+            --dotnet-opts       Additional options to pass on to \`dotnet restore\`, e.g. \`-p:Configuration=Release --configfile nuget.config\`. MSBuild properties among them also apply to project evaluation
+            --exclude-configs   Comma-separated glob patterns; target frameworks matching any pattern are skipped (applied after --include-configs)
+            --exclude-paths     List of glob patterns to exclude from manifest/facts generation. Patterns are anchored micromatch globs matched relative to CWD (\`--cwd\` if set): \`tests\` matches only \`<cwd>/tests\`; use \`**/tests\` to match at any depth. Negation patterns (\`!path\`) are not supported. Accepts a comma-separated value or multiple flags. An excluded JVM build module is not analysed as a project of its own, but where a project that is not excluded depends on it, its code is analysed as part of that project. A build module outside CWD cannot be excluded.
+            --ignore-unresolved  Warn on unresolved dependencies instead of failing the run (unresolved deps are not emitted to the facts file)
+            --include-configs   Comma-separated glob patterns matched against target frameworks (case-sensitive; \`*\`, \`?\`, and \`[...]\` wildcards). Only target frameworks matching at least one pattern are read, e.g. \`net8.0\`. A runtime-specific target (\`net8.0/win-x64\`) also matches its framework. Default: every target framework
+            --verbose           Print debug messages
+
+          Emits a \`<file>.socket.facts.json\` per solution or project describing its
+          resolved NuGet dependency graph. Given a directory, it builds every
+          solution (.sln, .slnx) and project (.csproj, .fsproj, .vbproj) at its top
+          level, solutions first, skipping projects a solution already covers; given
+          a file, just that one (a .slnf solution filter too).
+
+          Dependencies come from your own \`dotnet restore\` (same SDK, global.json,
+          nuget.config and credential providers), so a build that restores for you
+          restores here. PackageReference projects (central package management and
+          lock files included) and packages.config projects are supported. An
+          unresolved dependency is a fatal error unless --ignore-unresolved.
+
+          Support is beta. Please report issues or give us feedback on what's missing.
+
+          Examples
+
+            $ socket manifest dotnet .
+            $ socket manifest dotnet ./App.sln
+            $ socket manifest dotnet --dotnet-opts="-p:Configuration=Release" ."
+      `)
+      expect(`\n   ${stderr}`).toMatchInlineSnapshot(`
+        "
+           _____         _       _        /---------------
+          |   __|___ ___| |_ ___| |_      | CLI: <redacted>
+          |__   | * |  _| '_| -_|  _|     | token: <redacted>, org: <redacted>
+          |_____|___|___|_,_|___|_|.dev   | Command: \`socket manifest dotnet\`, cwd: <redacted>"
+      `)
+
+      expect(code, 'explicit help should exit with code 0').toBe(0)
+      expect(stderr, 'banner includes base command').toContain(
+        '`socket manifest dotnet`',
+      )
+    },
+  )
+
+  cmdit(
+    ['manifest', 'dotnet', FLAG_DRY_RUN, FLAG_CONFIG, '{}'],
+    'should require args with just dry-run',
+    async cmd => {
+      const { code, stderr, stdout } = await spawnSocketCli(binCliPath, cmd)
+      expect(stdout).toMatchInlineSnapshot(`"[DryRun]: Bailing now"`)
+      expect(`\n   ${stderr}`).toMatchInlineSnapshot(`
+        "
+           _____         _       _        /---------------
+          |   __|___ ___| |_ ___| |_      | CLI: <redacted>
+          |__   | * |  _| '_| -_|  _|     | token: <redacted>, org: <redacted>
+          |_____|___|___|_,_|___|_|.dev   | Command: \`socket manifest dotnet\`, cwd: <redacted>"
+      `)
+
+      expect(code, 'dry-run should exit with code 0 if input ok').toBe(0)
+    },
+  )
+})
@@ -1,32 +1,31 @@
-import { mkdtempSync, rmSync, writeFileSync } from 'node:fs'
+import { mkdirSync, mkdtempSync, rmSync, writeFileSync } from 'node:fs'
 import os from 'node:os'
 import path from 'node:path'
 
 import { afterEach, beforeEach, describe, expect, it } from 'vitest'
 
-import { detectManifestActions } from './detect-manifest-actions.mts'
+import {
+  detectManifestActions,
+  findDotnetEntries,
+} from './detect-manifest-actions.mts'
 
 import type { SocketJson } from '../../utils/socket-json.mts'
 
-function mkTmp(): string {
-  return mkdtempSync(path.join(os.tmpdir(), 'detect-manifest-bazel-'))
-}
+let cwd: string
+
+beforeEach(() => {
+  cwd = mkdtempSync(path.join(os.tmpdir(), 'detect-manifest-'))
+})
+
+afterEach(() => {
+  rmSync(cwd, { recursive: true, force: true })
+})
 
 function touch(dir: string, name: string): void {
   writeFileSync(path.join(dir, name), '')
 }
 
 describe('detectManifestActions — bazel detector', () => {
-  let cwd: string
-
-  beforeEach(() => {
-    cwd = mkTmp()
-  })
-
-  afterEach(() => {
-    rmSync(cwd, { recursive: true, force: true })
-  })
-
   it('skips bazel when defaults.manifest.bazel.disabled is true', async () => {
     touch(cwd, 'MODULE.bazel')
     const result = await detectManifestActions(
@@ -75,16 +74,6 @@ describe('detectManifestActions — bazel detector', () => {
 })
 
 describe('detectManifestActions — gradle detector', () => {
-  let cwd: string
-
-  beforeEach(() => {
-    cwd = mkTmp()
-  })
-
-  afterEach(() => {
-    rmSync(cwd, { recursive: true, force: true })
-  })
-
   it('detects build.gradle', async () => {
     touch(cwd, 'build.gradle')
     const result = await detectManifestActions(null, cwd)
@@ -140,16 +129,6 @@ describe('detectManifestActions — gradle detector', () => {
 })
 
 describe('detectManifestActions — conda detector', () => {
-  let cwd: string
-
-  beforeEach(() => {
-    cwd = mkTmp()
-  })
-
-  afterEach(() => {
-    rmSync(cwd, { recursive: true, force: true })
-  })
-
   it('detects environment.yml and reports it as the conda file', async () => {
     touch(cwd, 'environment.yml')
     const result = await detectManifestActions(null, cwd)
@@ -193,3 +172,50 @@ describe('detectManifestActions — conda detector', () => {
     expect(result.count).toBe(0)
   })
 })
+
+describe('detectManifestActions — dotnet detector', () => {
+  it.each([
+    'App.sln',
+    'App.slnx',
+    'App.csproj',
+    'App.fsproj',
+    'App.vbproj',
+    'APP.SLN',
+  ])('detects %s', async name => {
+    touch(cwd, name)
+    expect((await detectManifestActions(null, cwd)).dotnet).toBe(true)
+  })
+
+  it('ignores a solution filter, other files and directories named like projects', async () => {
+    touch(cwd, 'App.slnf')
+    touch(cwd, 'App.sqlproj')
+    mkdirSync(path.join(cwd, 'Lib.csproj'))
+    expect((await detectManifestActions(null, cwd)).dotnet).toBe(false)
+  })
+
+  it('skips dotnet when defaults.manifest.dotnet.disabled is true', async () => {
+    touch(cwd, 'App.sln')
+    const sockJson = {
+      defaults: { manifest: { dotnet: { disabled: true } } },
+    } as SocketJson
+    expect((await detectManifestActions(sockJson, cwd)).dotnet).toBe(false)
+  })
+
+  it('lists solutions before projects, each sorted by name', () => {
+    for (const name of [
+      'b.csproj',
+      'A.vbproj',
+      'Z.sln',
+      'M.slnx',
+      'notes.txt',
+    ]) {
+      touch(cwd, name)
+    }
+    expect(findDotnetEntries(cwd)).toEqual([
+      'M.slnx',
+      'Z.sln',
+      'A.vbproj',
+      'b.csproj',
+    ])
+  })
+})