8 files changed, 72 insertions, 28 deletions
diff --git a/_log/arduino-due.md b/_log/arduino-due.md
index e24666c..8176b3b 100644
--- a/_log/arduino-due.md
+++ b/_log/arduino-due.md
@@ -56,6 +56,7 @@ $ arm-none-eabi-gcc -mcpu=cortex-m3 -mthumb -T script.ld \
 $ openocd -f openocd-due.cfg -c "program a.elf verify reset exit"
 ```
 
-Commit:
-[3184969](https://git.asciimx.com/bare-metal-arduino-due/commit/?id=318496925ca76668dd9d63c3d060376f489276f8)
+Commit: <a
+href="https://git.asciimx.com/bare-metal-arduino-due/commit/?id=318496925ca76668dd9d63c3d060376f489276f8"
+class="external" target="_blank" rel="noopener noreferrer">3184969</a>.
 
diff --git a/_log/e-reader.md b/_log/e-reader.md
index 45363f7..66c262b 100644
--- a/_log/e-reader.md
+++ b/_log/e-reader.md
@@ -64,5 +64,7 @@ Can't think of anything else.
 
 Verdict: Functional but limited. Led to [Etlas](../etlas/).
 
-Commit:
-[7f691c4](https://git.asciimx.com/esp32-e-reader/commit/?id=7f691c46093933b67aab466c0ca582ace8ab73d4)
+Commit: <a
+href="https://git.asciimx.com/esp32-e-reader/commit/?id=7f691c46093933b67aab466c0ca582ace8ab73d4"
+class="external" target="_blank" rel="noopener noreferrer">7f691c4</a>.
+
diff --git a/_log/etlas.md b/_log/etlas.md
index a2458d5..6d5bd4e 100644
--- a/_log/etlas.md
+++ b/_log/etlas.md
@@ -101,5 +101,7 @@ via MCU.
 
 Uptime: August 2024 - January 2026
 
-Commit:
-[a92c86a](https://git.asciimx.com/etlas/commit/?id=a92c86ac1592c2137d3d1fec1668eacc2d0ca581)
+Commit: <a
+href="https://git.asciimx.com/etlas/commit/?id=a92c86ac1592c2137d3d1fec1668eacc2d0ca581"
+class="external" target="_blank" rel="noopener noreferrer">a92c86a</a>.
+
diff --git a/_log/fpm-door-lock-lp.md b/_log/fpm-door-lock-lp.md
index d63131e..aed991e 100644
--- a/_log/fpm-door-lock-lp.md
+++ b/_log/fpm-door-lock-lp.md
@@ -54,6 +54,7 @@ unlock. No match triggers red LED. MOSFETs off, back to sleep.
 
 Total power savings: 99.9% (30.6mA → 2.9μA). Verdict: Fixed. 
 
-Commit:
-[7529094](https://git.asciimx.com/fpm-door-lock/commit/?id=75290945b2fd84b3bc108fd46419ee478eaac3ca)
-| Gerber: [gerber.zip](gerber.zip)
+Commit: <a
+href="https://git.asciimx.com/fpm-door-lock/commit/?id=75290945b2fd84b3bc108fd46419ee478eaac3ca"
+class="external" target="_blank" rel="noopener noreferrer">7529094</a> | Gerber: [gerber.zip](gerber.zip)
+
diff --git a/_log/fpm-door-lock-rf.md b/_log/fpm-door-lock-rf.md
index 87dc6b4..8fe592a 100644
--- a/_log/fpm-door-lock-rf.md
+++ b/_log/fpm-door-lock-rf.md
@@ -68,7 +68,9 @@ Servo inrush current exceeds 1A. 0.3mm tracks cuts it too close.
 Verdict: Functional but not practical. Battery dead in under 24 hours. Led to
 [redesign](../fpm-door-lock-lp/) with proper power management.
 
-Commit:
-[f4b0b73](https://git.asciimx.com/smart-home/commit/?id=f4b0b734a595919cf451ab9448b06274c8e609a4)
-| Gerber: [gerber_back.zip](gerber_back.zip),
+Commit: <a
+href="https://git.asciimx.com/smart-home/commit/?id=f4b0b734a595919cf451ab9448b06274c8e609a4"
+class="external" target="_blank" rel="noopener noreferrer">f4b0b73</a> |
+Gerber: [gerber_back.zip](gerber_back.zip),
 [gerber_front.zip](gerber_front.zip)
+
diff --git a/_log/matrix-digital-rain.md b/_log/matrix-digital-rain.md
index 78fe623..2edc7e7 100644
--- a/_log/matrix-digital-rain.md
+++ b/_log/matrix-digital-rain.md
@@ -7,7 +7,7 @@ thumbnail: thumb_sm.png
 ---
 
 The 2022 version worked but had some loose ends. Unicode support was
-inflexible--couldn't mix ASCII with Katakana; Phosphor decay was stored in a
+incomplete--couldn't mix ASCII with Katakana; Phosphor decay was stored in a
 separate array when it should've been packed with RGB; Code was harder to read
 than it needed to be.
 
@@ -39,17 +39,48 @@ static inline void insert_code(matrix *mat,
     uint64_t blk;
     uint32_t min, max;
 
-    blk = glyphs[(rand() % glyphlen)];
+    blk = glyphs[(xor() % glyphlen)];
     min = (uint32_t)blk;
     max = (uint32_t)(blk >> 32);
-    mat->code[index(mat, row, col)] = rand() % (max - min) + min;
+    mat->code[index(mat, row, col)] = xor() % (max - min) + min;
 }
 ```
 
 Full-width Katakana breaks column alignment. Stick to half-width
 (U+FF61-U+FF9F) range. Compile with -DNOKANA to disable Katakana altogether.
 
-blend() is still good. Leaving it alone.
+blend() for screen decay is still good:
+
+```
+static inline void blend(matrix *mat,
+    size_t row, size_t col)
+{
+    unsigned char *color;
+
+    color = mat->rgb[index(mat, row, col)].color;
+    color[R] = color[R] - (color[R] - RGB_BG_RED) / DECAY_MPLIER;
+    color[G] = color[G] - (color[G] - RGB_BG_GRN) / DECAY_MPLIER;
+    color[B] = color[B] - (color[B] - RGB_BG_BLU) / DECAY_MPLIER;
+}
+```
+
+Left it alone.
+
+Optimized RNG--xorshift instead of rand():
+
+```
+static inline uint32_t xor(void)
+{
+    /* Xorshift RNGs, George Marsaglia, Florida State University. */
+    static uint32_t y = 2463534242;
+
+    y ^= (y << 13); 
+    y  = (y >> 17);
+    return (y ^= (y << 5));
+}
+```
+
+NOTE: Non-linear variations (xorshitr+) for more speed.
 
 Tossed license and automake cruft. Just `cc -O3 main.c -o matrix` now. Don't
 need the ceremony.
diff --git a/_log/neo4j-a-star-search.md b/_log/neo4j-a-star-search.md
index db74444..ca9a563 100644
--- a/_log/neo4j-a-star-search.md
+++ b/_log/neo4j-a-star-search.md
@@ -53,5 +53,7 @@ private void updateCosts(
 Upstreamed changes: <a
 href="https://github.com/neo4j-contrib/neo4j-graph-algorithms/releases/tag/3.4.0.0"
 class="external" target="_blank" rel="noopener noreferrer">Neo4J v3.4.0</a> | 
-[Full
-source](https://github.com/neo4j-contrib/neo4j-graph-algorithms/blob/bd9732d9a690319552e134708692acb5a0d6b37c/algo/src/main/java/org/neo4j/graphalgo/impl/ShortestPathAStar.java)
+<a
+href="https://github.com/neo4j-contrib/neo4j-graph-algorithms/blob/bd9732d9a690319552e134708692acb5a0d6b37c/algo/src/main/java/org/neo4j/graphalgo/impl/ShortestPathAStar.java"
+class="external" target="_blank" rel="noopener noreferrer">Full source</a>.
+
diff --git a/_log/site-search.md b/_log/site-search.md
index dab5133..4ccae3c 100644
--- a/_log/site-search.md
+++ b/_log/site-search.md
@@ -4,7 +4,7 @@ date: 2026-01-03
 layout: post
 ---
 
-Article count is growing. Need a way to search.
+Article count is growing. Need search.
 
 Requirements: matches substrings, case-insensitive, fast, secure. No
 JavaScript.
@@ -14,7 +14,7 @@ Architecture: browser → httpd → slowcgi → Perl CGI script.
 Perl, httpd, slowcgi are in the OpenBSD base system. Instead of secrets, file
 system permissions govern access.
 
-2025-12-30: Regex search.
+2025-12-30: Regex.
 
 140-line Perl script searches 500 files in 40ms. Fast enough; O(N) pull felt at
 higher file counts.
@@ -22,7 +22,7 @@ higher file counts.
 Introduces ReDoS and symlink attack vectors. Both can be mitigated. Tempted to
 stop here.
 
-2026-01-03: Suffix Array (SA) based index lookup.
+2026-01-03: Suffix array (SA) based index lookup.
 
 Slurping files on every request bothers me. Regex search depends almost
 entirely on hardware for speed.
@@ -36,8 +36,8 @@ $ cd cgi-bin/
 $ perl indexer.pl
 ```
 
-Indexer extracts HTML, lowercases, encodes into UTF-8 binary sequences. Null
-byte sentinel for document boundaries. sa.bin stores suffix offsets as
+Indexer extracts HTML, lowercases, and encodes into UTF-8 binary sequences.
+Null byte sentinel for document boundaries. sa.bin stores suffix offsets as
 32-bit unsigned integers, sorted by lexicographical order:
 
 ```
@@ -120,9 +120,12 @@ Resource exhaustion and XSS attacks are inherent. Former mitigated by limiting
 concurrent searches via lock-file semaphores. Query length (64B) and result set
 (20) capped. All output is HTML-escaped to prevent XSS.
 
-Secure by default. Fast. Durable.
+Verdict: Fast. Durable. Secure by default.
+
+Commit: <a
+href="https://git.asciimx.com/www/commit/?h=term&id=6da102d6e0494a3eac3f05fa3b2cdcc25ba2754e"
+class="external" target="_blank" rel="noopener noreferrer">6da102d</a> |
+Benchmarks: <a
+href="https://git.asciimx.com/site-search-bm/commit/?id=8a4da6809cf9368cd6a5dd7351181ea4256453f9"
+class="external" target="_blank" rel="noopener noreferrer">8a4da68</a>
 
-Commit:
-[6da102d](https://git.asciimx.com/www/commit/?h=term&id=6da102d6e0494a3eac3f05fa3b2cdcc25ba2754e)
-| Benchmarks:
-[8a4da68](https://git.asciimx.com/site-search-bm/commit/?id=8a4da6809cf9368cd6a5dd7351181ea4256453f9)