diff --git a/crates/alknet-core/src/auth/identity.rs b/crates/alknet-core/src/auth/identity.rs
index 4f39997..bd969d6 100644
--- a/crates/alknet-core/src/auth/identity.rs
+++ b/crates/alknet-core/src/auth/identity.rs
@@ -1,3 +1,8 @@
+//! Identity resolution and the `IdentityProvider` trait.
+//!
+//! See [ADR-029](docs/architecture/decisions/029-identity-provider.md) and
+//! [ADR-028](docs/architecture/decisions/028-identity-model.md).
+
 use std::collections::HashMap;
 use std::sync::Arc;
 
diff --git a/crates/alknet-core/src/call/mod.rs b/crates/alknet-core/src/call/mod.rs
index 09d47ed..2dabb2e 100644
--- a/crates/alknet-core/src/call/mod.rs
+++ b/crates/alknet-core/src/call/mod.rs
@@ -1,3 +1,8 @@
+//! Call protocol layer (Layer 3) of the three-layer model.
+//!
+//! See [ADR-024](docs/architecture/decisions/024-call-protocol.md) and
+//! [ADR-033](docs/architecture/decisions/033-call-protocol-extensions.md).
+
 pub mod context;
 pub mod env;
 pub mod envelope;
diff --git a/crates/alknet-core/src/call/spec.rs b/crates/alknet-core/src/call/spec.rs
index e1efaa8..e6eb71d 100644
--- a/crates/alknet-core/src/call/spec.rs
+++ b/crates/alknet-core/src/call/spec.rs
@@ -1,3 +1,8 @@
+//! Operation specifications (type, access control) for the call protocol.
+//!
+//! See [ADR-025](docs/architecture/decisions/025-operation-spec.md) and
+//! [ADR-033](docs/architecture/decisions/033-call-protocol-extensions.md).
+
 use serde::{Deserialize, Serialize};
 use serde_json::Value;
 
diff --git a/crates/alknet-core/src/config/config_service.rs b/crates/alknet-core/src/config/config_service.rs
index 173eca5..fe55c2b 100644
--- a/crates/alknet-core/src/config/config_service.rs
+++ b/crates/alknet-core/src/config/config_service.rs
@@ -1,3 +1,7 @@
+//! Configuration service for runtime config reload.
+//!
+//! See [ADR-030](docs/architecture/decisions/030-dynamic-config.md).
+
 use std::sync::Arc;
 
 use arc_swap::ArcSwap;
diff --git a/crates/alknet-core/src/config/dynamic_config.rs b/crates/alknet-core/src/config/dynamic_config.rs
index ca25160..ca7f588 100644
--- a/crates/alknet-core/src/config/dynamic_config.rs
+++ b/crates/alknet-core/src/config/dynamic_config.rs
@@ -1,3 +1,7 @@
+//! Runtime-reloadable dynamic configuration (auth policy, forwarding policy, rate limits).
+//!
+//! See [ADR-030](docs/architecture/decisions/030-dynamic-config.md).
+
 use std::collections::HashMap;
 use std::sync::Arc;
 
diff --git a/crates/alknet-core/src/config/forwarding.rs b/crates/alknet-core/src/config/forwarding.rs
index 927040a..553c0e3 100644
--- a/crates/alknet-core/src/config/forwarding.rs
+++ b/crates/alknet-core/src/config/forwarding.rs
@@ -1,3 +1,7 @@
+//! Forwarding policy engine for per-identity and per-transport access control.
+//!
+//! See [ADR-031](docs/architecture/decisions/031-forwarding-policy.md).
+
 use std::net::IpAddr;
 use std::ops::Range;
 use std::str::FromStr;
diff --git a/crates/alknet-core/src/config/static_config.rs b/crates/alknet-core/src/config/static_config.rs
index 55235cf..f8eb54c 100644
--- a/crates/alknet-core/src/config/static_config.rs
+++ b/crates/alknet-core/src/config/static_config.rs
@@ -1,3 +1,7 @@
+//! Static (immutable) server configuration resolved at startup.
+//!
+//! See [ADR-030](docs/architecture/decisions/030-dynamic-config.md).
+
 use crate::interface::InterfaceKind;
 use crate::server::handler::{ProxyConfig, ProxyMode};
 use crate::server::serve::{ListenerConfig, ServeTransportMode};
diff --git a/tasks/cleanup/adr-doc-comments.md b/tasks/cleanup/adr-doc-comments.md
index c1b6515..ac75bc6 100644
--- a/tasks/cleanup/adr-doc-comments.md
+++ b/tasks/cleanup/adr-doc-comments.md
@@ -1,7 +1,7 @@
 ---
 id: cleanup/adr-doc-comments
 name: Add ADR number references to doc comments in new modules
-status: pending
+status: completed
 depends_on:
   - review/phase1-core-modifications
 scope: narrow
@@ -39,4 +39,4 @@ The existing codebase has a pattern of referencing ADR numbers in doc comments (
 
 ## Summary
 
-> To be filled on completion
\ No newline at end of file
+> Added ADR number references to module-level doc comments in auth/identity.rs (ADR-029, ADR-028), config/forwarding.rs (ADR-031), config/static_config.rs (ADR-030), config/dynamic_config.rs (ADR-030), config/config_service.rs (ADR-030), call/mod.rs (ADR-024, ADR-033), call/spec.rs (ADR-025, ADR-033). Style matches existing pattern in transport/mod.rs.
\ No newline at end of file