docs: update runbook with cargo run commands and matrix config

docs/TODO.md

@@ -24,13 +24,13 @@
 ## Milestone 3 -- KX selection (X25519 vs X25519MLKEM768) \[MUST\]
 
 - [x] rustls provider wiring (`aws_lc_rs` for PQ)
-- [ ] negotiated group logging (debug mode)
+- [X] negotiated group logging (debug mode)
 
 ## Milestone 4 -- Concurrency & runner [MUST]
 
 - [x] tokio-based runner
 - [X] concurrency control and warmup
-- [ ] matrix runner over (mode, payload, concurrency)
+- [X] matrix runner over (mode, payload, concurrency)
 
 ## Milestone 5 -- HTTP/1.1 mode (hyper) \[OPTIONAL\]
 

docs/runbook.md

@@ -20,13 +20,41 @@ Example:
 
 ```bash
 ./target/release/runner \
-  --server 1.2.3.4:4433 \
-  --mode x25519mlkem768 \
-  --payload-bytes 1024 \
-  --concurrency 10 \
-  --iters 500 \
-  --warmup 50 \
-  --out results.ndjson
+    --server 1.2.3.4:4433 \
+    --mode x25519mlkem768 \
+    --payload-bytes 1024 \
+    --concurrency 10 \
+    --iters 500 \
+    --warmup 50 \
+    --out results.ndjson
+```
+
+### Matrix Benchmarks
+
+Create a config file (`matrix.toml`):
+
+```toml
+[[benchmarks]]
+server = "1.2.3.4:4433"
+mode = "x25519"
+payload = 1024
+iters = 500
+warmup = 50
+concurrency = 1
+
+[[benchmarks]]
+server = "1.2.3.4:4433"
+mode = "x25519mlkem768"
+payload = 1024
+iters = 500
+warmup = 50
+concurrency = 1
+```
+
+Run matrix:
+
+```bash
+./target/release/runner --config matrix.toml
 ```
 
 ## 4) Collect perf stats (optional)
@@ -34,8 +62,7 @@ Example:
 Run on the client:
 
 ```bash
- perf stat -e cycles,instructions,cache-misses \
-   ./target/release/runner ...
+perf stat -e cycles,instructions,cache-misses ./target/release/runner ...
 ```
 
 ## 5) Summarize