diff --git a/.claude/commands/lint-enforce.md b/.claude/commands/lint-enforce.md
new file mode 100644
index 00000000..fe4e3323
--- /dev/null
+++ b/.claude/commands/lint-enforce.md
@@ -0,0 +1,13 @@
+Please follow the following process when I ask you to enfore a new lint rule using /lint-enforce $rule
+
+1. Create and change to a new branch. Ask for the branch name.
+2. Configure the rule to error in biome.json
+3. Run lint (npm run lint). If there are NO errors, goto step 9
+4. If there are no errors goto X
+5. Use biome to SAFELY auto fix (npm run lint -- --fix). If there are errors stop and ask for instruction.
+7. Run the tests (npm test). If there are errors, stop and ask for instruction.
+8. If the rule defaults to error, delete it (See https://biomejs.dev/linter/javascript/rules/ for rule details)
+9. Update the project changelog
+10. Add the changes
+11. Commit the changes
+12. Push the changes
diff --git a/CHANGELOG.md b/CHANGELOG.md
index be6fee36..069141ff 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@
 - Add node: protocol prefix to Node.js builtin module imports for clarity
 - Use modern exponentiation operator (**) instead of Math.pow()
 - Replace string concatenation with modern template literals
+- Remove redundant 'use strict' directives as modules are automatically in strict mode
 
 ## v0.10.9
 - Add support for IPv6 urls
diff --git a/biome.json b/biome.json
index a0469411..8981412e 100644
--- a/biome.json
+++ b/biome.json
@@ -20,7 +20,7 @@
         "useLiteralKeys": "off"
       },
       "suspicious": {
-        "noRedundantUseStrict": "off",
+        "noRedundantUseStrict": "error",
         "noAssignInExpressions": "off",
         "noAsyncPromiseExecutor": "off",
         "noDoubleEquals": "off",
diff --git a/examples/receive_generator.js b/examples/receive_generator.js
index 4136f7d0..73da1392 100644
--- a/examples/receive_generator.js
+++ b/examples/receive_generator.js
@@ -1,6 +1,4 @@
 #!/usr/bin/env node
-
-'use strict';
 const co = require('co');
 const amqp = require('amqplib');
 const readline = require('node:readline');
diff --git a/examples/send_generators.js b/examples/send_generators.js
index e1ca1978..7f97d321 100755
--- a/examples/send_generators.js
+++ b/examples/send_generators.js
@@ -1,7 +1,5 @@
 #!/usr/bin/env node
 
-'use strict';
-
 // NB this requires the module 'co':
 //    npm install co
 const co = require('co');
diff --git a/lib/api_args.js b/lib/api_args.js
index 83410498..0ef4734f 100644
--- a/lib/api_args.js
+++ b/lib/api_args.js
@@ -1,9 +1,3 @@
-//
-//
-//
-
-'use strict';
-
 /*
 The channel (promise) and callback APIs have similar signatures, and
 in particular, both need AMQP fields prepared from the same arguments
diff --git a/lib/bitset.js b/lib/bitset.js
index aa396ab0..a352b5c1 100644
--- a/lib/bitset.js
+++ b/lib/bitset.js
@@ -1,9 +1,3 @@
-//
-//
-//
-
-'use strict';
-
 /**
  * A bitset implementation, after that in java.util.  Yes there
  * already exist such things, but none implement next{Clear|Set}Bit or
diff --git a/lib/callback_model.js b/lib/callback_model.js
index 591c5963..c7822151 100644
--- a/lib/callback_model.js
+++ b/lib/callback_model.js
@@ -1,9 +1,3 @@
-//
-//
-//
-
-'use strict';
-
 const defs = require('./defs');
 const EventEmitter = require('node:events');
 const BaseChannel = require('./channel').BaseChannel;
diff --git a/lib/channel.js b/lib/channel.js
index 9af453b6..f510d7ad 100644
--- a/lib/channel.js
+++ b/lib/channel.js
@@ -1,11 +1,3 @@
-//
-//
-//
-
-// Channel machinery.
-
-'use strict';
-
 const defs = require('./defs');
 const closeMsg = require('./format').closeMessage;
 const inspect = require('./format').inspect;
diff --git a/lib/channel_model.js b/lib/channel_model.js
index 530e929d..4a8a7d27 100644
--- a/lib/channel_model.js
+++ b/lib/channel_model.js
@@ -1,9 +1,3 @@
-//
-//
-//
-
-'use strict';
-
 const EventEmitter = require('node:events');
 const promisify = require('node:util').promisify;
 const defs = require('./defs');
diff --git a/lib/codec.js b/lib/codec.js
index 5ef40f10..0b456461 100644
--- a/lib/codec.js
+++ b/lib/codec.js
@@ -1,9 +1,4 @@
-//
-//
-//
-
 /*
-
 The AMQP 0-9-1 is a mess when it comes to the types that can be
 encoded on the wire.
 
@@ -48,11 +43,8 @@ except that they appear in content header frames, which include a
 content size, and they carry a set of flags indicating which
 properties are present. This scheme can save ones of bytes per message
 (messages which take a minimum of three frames each to send).
-
 */
 
-'use strict';
-
 const ints = require('buffer-more-ints');
 
 // JavaScript uses only doubles so what I'm testing for is whether
diff --git a/lib/connect.js b/lib/connect.js
index 5d13eefb..4446facd 100644
--- a/lib/connect.js
+++ b/lib/connect.js
@@ -1,11 +1,3 @@
-//
-//
-//
-
-// General-purpose API for glueing everything together.
-
-'use strict';
-
 const URL = require('url-parse');
 const QS = require('node:querystring');
 const Connection = require('./connection').Connection;
diff --git a/lib/connection.js b/lib/connection.js
index f4d4cded..04b862cb 100644
--- a/lib/connection.js
+++ b/lib/connection.js
@@ -1,9 +1,3 @@
-//
-//
-//
-
-'use strict';
-
 const defs = require('./defs');
 const constants = defs.constants;
 const frame = require('./frame');
diff --git a/lib/format.js b/lib/format.js
index bd69786d..ff638df0 100644
--- a/lib/format.js
+++ b/lib/format.js
@@ -1,11 +1,3 @@
-//
-//
-//
-
-// Stringifying various things
-
-'use strict';
-
 const defs = require('./defs');
 const format = require('node:util').format;
 const HEARTBEAT = require('./frame').HEARTBEAT;
diff --git a/lib/frame.js b/lib/frame.js
index 74dfe549..e1373e0a 100644
--- a/lib/frame.js
+++ b/lib/frame.js
@@ -1,9 +1,3 @@
-// The river sweeps through
-// Silt and twigs, gravel and leaves
-// Driving the wheel on
-
-'use strict';
-
 const ints = require('buffer-more-ints');
 const defs = require('./defs');
 const constants = defs.constants;
diff --git a/lib/heartbeat.js b/lib/heartbeat.js
index 3e38dd4f..b0037dde 100644
--- a/lib/heartbeat.js
+++ b/lib/heartbeat.js
@@ -1,7 +1,3 @@
-//
-//
-//
-
 // Heartbeats. In AMQP both clients and servers may expect a heartbeat
 // frame if there is no activity on the connection for a negotiated
 // period of time. If there's no activity for two such intervals, the
@@ -45,8 +41,6 @@
 // %% Yes, I could apply the same 'actually passage of time' thing to
 // %% send as well as to recv.
 
-'use strict';
-
 const EventEmitter = require('node:events');
 
 // Exported so that we can mess with it in tests
diff --git a/lib/mux.js b/lib/mux.js
index a3941aa8..0ece5aa9 100644
--- a/lib/mux.js
+++ b/lib/mux.js
@@ -1,9 +1,3 @@
-//
-//
-//
-
-'use strict';
-
 // A Mux is an object into which other readable streams may be piped;
 // it then writes 'packets' from the upstreams to the given
 // downstream.
diff --git a/test/bitset.js b/test/bitset.js
index 8083a218..ce852577 100644
--- a/test/bitset.js
+++ b/test/bitset.js
@@ -1,5 +1,3 @@
-'use strict';
-
 const claire = require('claire');
 const {BitSet} = require('../lib/bitset');
 
diff --git a/test/callback_api.js b/test/callback_api.js
index 89c19191..8bc9be29 100644
--- a/test/callback_api.js
+++ b/test/callback_api.js
@@ -1,5 +1,3 @@
-'use strict';
-
 const assert = require('node:assert');
 const api = require('../callback_api');
 const util = require('./util');
diff --git a/test/channel.js b/test/channel.js
index f69dfcec..b4107fcf 100644
--- a/test/channel.js
+++ b/test/channel.js
@@ -1,7 +1,3 @@
-// Test the channel machinery
-
-'use strict';
-
 const assert = require('node:assert');
 const promisify = require('node:util').promisify;
 const Channel = require('../lib/channel').Channel;
diff --git a/test/channel_api.js b/test/channel_api.js
index b4748e4d..bb909be5 100644
--- a/test/channel_api.js
+++ b/test/channel_api.js
@@ -1,5 +1,3 @@
-'use strict';
-
 const assert = require('node:assert');
 const api = require('../channel_api');
 const util = require('./util');
diff --git a/test/codec.js b/test/codec.js
index 5523e9b9..a6dbe882 100644
--- a/test/codec.js
+++ b/test/codec.js
@@ -1,5 +1,3 @@
-'use strict';
-
 const codec = require('../lib/codec');
 const defs = require('../lib/defs');
 const assert = require('node:assert');
diff --git a/test/connect.js b/test/connect.js
index 8ada9d98..3c1fd8d3 100644
--- a/test/connect.js
+++ b/test/connect.js
@@ -1,5 +1,3 @@
-'use strict';
-
 const connect = require('../lib/connect').connect;
 const credentialsFromUrl = require('../lib/connect').credentialsFromUrl;
 const defs = require('../lib/defs');
diff --git a/test/connection.js b/test/connection.js
index bd54dea9..d4bbfc45 100644
--- a/test/connection.js
+++ b/test/connection.js
@@ -1,5 +1,3 @@
-'use strict';
-
 const assert = require('node:assert');
 const defs = require('../lib/defs');
 const Connection = require('../lib/connection').Connection;
diff --git a/test/data.js b/test/data.js
index f0a01697..bb4bce1d 100644
--- a/test/data.js
+++ b/test/data.js
@@ -1,7 +1,3 @@
-// Property-based testing representations of various things in AMQP
-
-'use strict';
-
 const C = require('claire');
 const forAll = C.forAll;
 const arb = C.data;
diff --git a/test/frame.js b/test/frame.js
index 54756b40..5535040c 100644
--- a/test/frame.js
+++ b/test/frame.js
@@ -1,5 +1,3 @@
-'use strict';
-
 const assert = require('node:assert');
 const connection = require('../lib/connection');
 const Frames = connection.Connection;
diff --git a/test/mux.js b/test/mux.js
index 92f03725..2394f841 100644
--- a/test/mux.js
+++ b/test/mux.js
@@ -1,5 +1,3 @@
-'use strict';
-
 const assert = require('node:assert');
 const Mux = require('../lib/mux').Mux;
 const PassThrough = require('node:stream').PassThrough;
diff --git a/test/util.js b/test/util.js
index 2bcac09d..baf84834 100644
--- a/test/util.js
+++ b/test/util.js
@@ -1,5 +1,3 @@
-'use strict';
-
 const crypto = require('node:crypto');
 const Connection = require('../lib/connection').Connection;
 const PassThrough = require('node:stream').PassThrough;