feat: Add INVEST semantic anchor (#issue)

Co-authored-by: rdmueller <1856308+rdmueller@users.noreply.github.com>

Author: Copilot

docs/anchors/invest.adoc

@@ -0,0 +1,47 @@
+= INVEST
+:categories: requirements-engineering
+:roles: product-owner, business-analyst, team-lead, software-developer
+:related: user-story-mapping, moscow
+:proponents: Bill Wake
+:tags: user-stories, agile, scrum, acceptance-criteria, story-quality
+
+[%collapsible]
+====
+Full Name:: INVEST Criteria for User Stories
+
+Also known as:: INVEST Checklist, INVEST Mnemonic
+
+[discrete]
+== *Core Concepts*:
+
+INVEST = **I**ndependent / **N**egotiable / **V**aluable / **E**stimable / **S**mall / **T**estable
+
+Independent:: Stories should be self-contained and deliverable in any order; avoid dependencies between stories that force a fixed implementation sequence
+
+Negotiable:: Stories are not contracts; the details are open to discussion between team and stakeholders until they enter a sprint
+
+Valuable:: Every story must deliver clear value to the user or business; stories that only serve technical needs should be wrapped in user-visible value
+
+Estimable:: The team must be able to estimate the story's size; if they cannot, the story is too large, too vague, or requires a spike
+
+Small:: Stories should be small enough to complete within a single sprint; large epics must be broken down before entering a sprint
+
+Testable:: Stories require concrete acceptance criteria so developers and testers can verify completion; untestable stories hide ambiguity
+
+
+Key Proponent:: Bill Wake ("INVEST in Good Stories, and SMART Tasks", 2003)
+
+[discrete]
+== *When to Use*:
+
+* Reviewing user stories before sprint planning to assess readiness
+* Splitting epics into smaller, deliverable stories
+* Coaching teams on what constitutes a well-formed user story
+* During backlog refinement to identify stories that need more work
+* As a Definition of Ready checklist for story acceptance into a sprint
+
+*Related Anchors*:
+
+* <<user-story-mapping,User Story Mapping>>
+* <<moscow,MoSCoW>>
+====

skill/semantic-anchor-translator/references/catalog.md

@@ -188,6 +188,10 @@ Source: https://github.com/LLM-Coding/Semantic-Anchors
 
 ## Requirements Engineering
 
+### INVEST
+- **Proponents:** Bill Wake
+- **Core:** Independent, Negotiable, Valuable, Estimable, Small, Testable — criteria for well-formed user stories
+
 ### MoSCoW
 - **Proponents:** Dai Clegg
 - **Core:** Must have, Should have, Could have, Won't have

website/public/data/anchors.json

@@ -1389,6 +1389,34 @@
     "tags": [],
     "filePath": "docs/anchors/impact-mapping.adoc"
   },
+  {
+    "id": "invest",
+    "title": "INVEST",
+    "categories": [
+      "requirements-engineering"
+    ],
+    "roles": [
+      "product-owner",
+      "business-analyst",
+      "team-lead",
+      "software-developer"
+    ],
+    "related": [
+      "user-story-mapping",
+      "moscow"
+    ],
+    "proponents": [
+      "Bill Wake"
+    ],
+    "tags": [
+      "user-stories",
+      "agile",
+      "scrum",
+      "acceptance-criteria",
+      "story-quality"
+    ],
+    "filePath": "docs/anchors/invest.adoc"
+  },
   {
     "id": "jobs-to-be-done",
     "title": "Jobs To Be Done (JTBD)",

website/public/data/categories.json

@@ -106,6 +106,7 @@
     "name": "Requirements Engineering",
     "anchors": [
       "ears-requirements",
+      "invest",
       "moscow",
       "problem-space-nvc",
       "user-story-mapping"