Add 'tooling' category to Repo Classification Standard

Insert a 'tooling' category between project and product (reusable internal
tooling/infrastructure: libraries, CLIs, services, ops components used across
the ecosystem rather than offered to external customers). Update §5 definition,
§11 decision procedure, §16 agent prompt, the machine-readable allowed-values,
and the CUST-WP-0050 T02 progress note. Nine custodian tooling repos
reclassified to it; the-custodian and inter-hub remain research.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

canon/standards/repo-classification-standard_v1.0.md

@@ -164,6 +164,7 @@ category:
   - experimental
   - research
   - project
+  - tooling
   - product
   - business
 ```
@@ -233,7 +234,31 @@ Examples:
 category: project
 ```
 
-### 5.4 `product`
+### 5.4 `tooling`
+
+Use for reusable internal tooling and infrastructure that supports building,
+coordinating, or operating other work — libraries, CLIs, services, and ops
+components used across the ecosystem rather than offered to external customers.
+
+Main question:
+
+> Does this reliably support how we build and operate other work?
+
+Typical signs:
+
+- reused across multiple repos or by agents/operators,
+- stable enough to depend on, but not a customer-facing product,
+- no external pricing, customer onboarding, or go-to-market concerns,
+- sits between `project` (a bounded build) and `product` (an offerable to
+  customers); may graduate to `product` if later externalised.
+
+Examples:
+
+```yaml
+category: tooling
+```
+
+### 5.5 `product`
 
 Use for reusable, offerable products or product components with intended users or customers.
 
@@ -255,7 +280,7 @@ Examples:
 category: product
 ```
 
-### 5.5 `business`
+### 5.6 `business`
 
 Use for repos organizing commercial, operational, legal, strategic, financial, or organizational activity.
 
@@ -623,8 +648,9 @@ Ask:
 1. Is this mainly a spike or prototype? → `experimental`
 2. Is this mainly knowledge, terminology, research, or standards? → `research`
 3. Is this a bounded implementation effort? → `project`
-4. Is this reusable and offerable to users/customers? → `product`
-5. Is this about commercial, legal, financial, strategic, or organizational viability? → `business`
+4. Is this reusable internal tooling/infrastructure supporting other work? → `tooling`
+5. Is this reusable and offerable to users/customers? → `product`
+6. Is this about commercial, legal, financial, strategic, or organizational viability? → `business`
 
 ### Step 2: Identify the primary domain
 
@@ -1051,7 +1077,7 @@ Use the following prompt for agent-assisted classification.
 Classify this repository according to the Repo Classification Standard.
 
 Return a YAML block with:
-- category: one of experimental, research, project, product, business
+- category: one of experimental, research, project, tooling, product, business
 - domain: one of infotech, financials, communication, consumer, health, industrials, energy, utilities, materials, realestate, crypto, agents, space, government
 - secondary_domains: zero or more allowed domains, excluding the primary domain
 - capability_tags: lowercase kebab-case tags describing what the repo does or enables

canon/standards/repo-classification.allowed.yaml

@@ -17,6 +17,7 @@ categories:
   - experimental
   - research
   - project
+  - tooling
   - product
   - business