diff --git a/src/docs/Modules/Module-Types.md b/src/docs/Modules/Module-Types.md
new file mode 100644
index 0000000..be97843
--- /dev/null
+++ b/src/docs/Modules/Module-Types.md
@@ -0,0 +1,106 @@
+# Module types
+
+Most PSModule modules fall into one of a few archetypes. The general rules in
+[PowerShell module standard](Standards.md) and [PowerShell Standards](../PowerShell/Standard/index.md) always apply; this
+page adds the conventions that are specific to a module's type so that modules of the same kind feel
+the same to use.
+
+Two archetypes have enough shared shape to standardize:
+
+- **Integration (API) modules** wrap an external service's REST or GraphQL API.
+- **Data modules** convert or manage a data format or in-memory structure.
+
+A module can be both (for example, an integration module that also exposes conversion helpers).
+Apply each relevant section.
+
+## Integration (API) modules
+
+Integration modules are the PowerShell face of an external service. `GitHub`, and the
+service-client modules such as `Anthropic`, `OpenAI`, `Bluesky`, and `Domeneshop`, are integration
+modules.
+
+### Command naming maps to the resource, not the HTTP method
+
+Name commands after the resource and the intent, using approved verbs. Never name a command after
+the HTTP method or the endpoint path. Map REST methods to verbs:
+
+| REST method | PowerShell verb | Example |
+| ----------- | --------------- | ------- |
+| `GET` | `Get-` | `Get-GitHubRepository` |
+| `POST` (create) | `New-` / `Add-` | `New-GitHubRepository` |
+| `PUT` / `PATCH` (update) | `Set-` / `Update-` | `Set-GitHubRepository` |
+| `DELETE` | `Remove-` | `Remove-GitHubRepository` |
+| Non-CRUD action | Approved verb for the intent | `Invoke-`, `Start-`, `Stop-`, `Enable-`, ... |
+
+Prefix the noun with the service's term of art (`GitHubRepository`, not `Repository`).
+
+### Transport abstraction
+
+Lower-level helpers own the concrete `Invoke-RestMethod` / GraphQL / HTTP calls. How you expose
+or hide this abstraction is a design choice:
+
+- **Private transport** (common): Keep REST, GraphQL, and HTTP helpers private. Public functions
+  accept resolved inputs and typed objects. This follows the Dependency Inversion rule from
+  [Standards](Standards.md#solid-applied) applied to the network boundary.
+- **Public transport**: Expose REST or GraphQL functions publicly for power users or module
+  composition.
+- **Public Context**: Expose the `Context` module as public so users can configure and manage
+  module state, secrets, and settings directly.
+
+Choose the strategy that best serves your module's audience.
+
+### Use Context for user and module settings
+
+Integration modules persist state with the [`Context`](https://github.com/PSModule/Context) module
+rather than inventing bespoke storage. Context provides on-disk storage for user data and secrets,
+organized by context and environment. Two kinds of state are both standard:
+
+- **User settings and secrets**: accounts, tokens, sessions, and per-user configuration. Store these
+  in a per-user context. `Context` encrypts secrets at rest (via `Sodium`), so a user can resume work
+  without reconfiguring or logging in again when the service supports session refresh.
+- **Module settings**: module-wide defaults, endpoints, and feature flags that are not tied to a
+  single user. Store these in a module-scoped context.
+
+Your module must expose functions and object types so users can target specific contexts and
+environments. Users need to be able to read from, write to, and manage contexts programmatically,
+selecting which environment or context their functions operate against. Persisting both through
+`Context` gives every integration module the same, discoverable settings model and keeps secrets
+out of source, logs, and plain files.
+
+## Data modules
+
+Data modules convert between representations or manage an in-memory structure. `Hashtable` is the
+reference shape; `Base64`, `Json`, `Lua`, `Hcl`, `Sodium`, and `Uri` follow the same pattern.
+
+### The neutral object is the pivot
+
+Every conversion goes through the neutral PowerShell object model
+(`[PSCustomObject]` / `[hashtable]` / `[PSObject]`). `ConvertFrom-<Format>` parses a
+format-specific representation into an object; `ConvertTo-<Format>` renders an object into the
+format. Converting through the object as a common pivot means any format interoperates with any
+other, instead of writing a direct converter for every pair.
+
+Always ship both directions so data can round-trip between the format and the object model.
+
+### Verb vocabulary
+
+| Verb pattern | Purpose |
+| ------------ | ------- |
+| `ConvertFrom-<Format>` | Format-specific text/representation → `[PSCustomObject]` / `[hashtable]` |
+| `ConvertTo-<Format>` | `[PSCustomObject]` / `[hashtable]` → format-specific text/representation |
+| `Import-<Noun>` | Read from a file or store into objects |
+| `Export-<Noun>` | Write objects to a file or store |
+| `Format-<Noun>` | Produce a normalized or pretty rendering |
+| `Merge-<Noun>` | Combine two structures |
+| `Compare-<Noun>` | Diff two structures |
+| `Test-<Noun>` | Validate a value or structure |
+| `Remove-<Noun>Entry` | Remove elements by criteria |
+
+The `Hashtable` module demonstrates the full set: `ConvertFrom-Hashtable`, `ConvertTo-Hashtable`,
+`Import-Hashtable`, `Export-Hashtable`, `Format-Hashtable`, `Merge-Hashtable`, and
+`Remove-HashtableEntry`.
+
+## Where this connects
+
+- [PowerShell module standard](Standards.md): layout, private functions, and the mandatory context parameter.
+- [Repository Defaults](Repository-Defaults.md): repository files, README shape, and agent onboarding.
diff --git a/src/docs/Modules/Repository-Defaults.md b/src/docs/Modules/Repository-Defaults.md
index 3575b76..066f06b 100644
--- a/src/docs/Modules/Repository-Defaults.md
+++ b/src/docs/Modules/Repository-Defaults.md
@@ -2,7 +2,7 @@
 
 This page defines the default repository contract for PowerShell module repositories in the PSModule organization. It describes what a newly created or maintained module repository should look like before module-specific code, tests, documentation, and managed repository files are considered.
 
-The implementation standard still lives in [PowerShell module standard](Standards.md). This page covers repository defaults: files, metadata, README shape, release integration, placeholder handling, shared community files, and managed-file distribution.
+The implementation standard still lives in [PowerShell module standard](Standards.md). Type-specific conventions for integration (API) and data modules live in [Module types](Module-Types.md). This page covers repository defaults: files, metadata, README shape, release integration, placeholder handling, shared community files, and managed-file distribution.
 
 ## Scope
 
diff --git a/src/docs/Modules/index.md b/src/docs/Modules/index.md
index 8c458df..2989ec8 100644
--- a/src/docs/Modules/index.md
+++ b/src/docs/Modules/index.md
@@ -13,6 +13,7 @@ This section is the local source of truth for:
 
 - [Repository Defaults](Repository-Defaults.md)
 - [Standards](Standards.md)
+- [Module types](Module-Types.md)
 - [Test Specification](Test-Specification.md)
 - [Versioning](Versioning.md)
 - [Catalog](Catalog/index.md)
diff --git a/src/zensical.toml b/src/zensical.toml
index 24f5553..7894e6f 100644
--- a/src/zensical.toml
+++ b/src/zensical.toml
@@ -21,6 +21,7 @@ nav = [
     "Modules/index.md",
     {"Repository Defaults" = "Modules/Repository-Defaults.md"},
     {"Standards" = "Modules/Standards.md"},
+    {"Module types" = "Modules/Module-Types.md"},
     {"Test Specification" = "Modules/Test-Specification.md"},
     {"Versioning" = "Modules/Versioning.md"},
     {"Catalog" = [