diff --git a/Cargo.lock b/Cargo.lock
index 7e0ce77..664f757 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,12 +2,6 @@
 # It is not intended for manual editing.
 version = 4
 
-[[package]]
-name = "adler2"
-version = "2.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "320119579fcad9c21884f5c4861d16174d0e06250625266f50fe6898340abefa"
-
 [[package]]
 name = "ahash"
 version = "0.7.8"
@@ -43,19 +37,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "ansi-to-tui"
-version = "8.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e42366bb9d958f042bf58f0a85e1b2d091997c1257ca49bddd7e4827aadc65fd"
-dependencies = [
- "nom 8.0.0",
- "ratatui-core",
- "simdutf8",
- "smallvec",
- "thiserror 2.0.18",
-]
-
 [[package]]
 name = "anstream"
 version = "1.0.0"
@@ -529,15 +510,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "crc32fast"
-version = "1.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9481c1c90cbf2ac953f07c8d4a58aa3945c425b7185c9154d67a65e4230da511"
-dependencies = [
- "cfg-if",
-]
-
 [[package]]
 name = "crossbeam-deque"
 version = "0.8.6"
@@ -682,12 +654,6 @@ dependencies = [
  "syn 2.0.117",
 ]
 
-[[package]]
-name = "diff"
-version = "0.1.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "56254986775e3233ffa9c4d7d3faaf6d36a2c09d30b20687e9f88bc8bafc16c8"
-
 [[package]]
 name = "digest"
 version = "0.10.7"
@@ -857,16 +823,6 @@ version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0ce7134b9999ecaf8bcd65542e436736ef32ddca1b3e06094cb6ec5755203b80"
 
-[[package]]
-name = "flate2"
-version = "1.1.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "843fba2746e448b37e26a819579957415c8cef339bf08564fe8b7ddbd959573c"
-dependencies = [
- "crc32fast",
- "miniz_oxide",
-]
-
 [[package]]
 name = "fnv"
 version = "1.0.7"
@@ -977,12 +933,6 @@ version = "0.3.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "037711b3d59c33004d3856fbdc83b99d4ff37a24768fa1be9ce3538a1cde4393"
 
-[[package]]
-name = "futures-timer"
-version = "3.0.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f288b0a4f20f9a56b5d1da57e2227c661b7b16168e2f72365f57b63326e29b24"
-
 [[package]]
 name = "futures-util"
 version = "0.3.32"
@@ -1393,12 +1343,6 @@ dependencies = [
  "bitflags 2.11.0",
 ]
 
-[[package]]
-name = "linked-hash-map"
-version = "0.5.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0717cef1bc8b636c6e1c1bbdefc09e6322da8a9321966e8928ef80d20f7f770f"
-
 [[package]]
 name = "linux-raw-sys"
 version = "0.12.1"
@@ -1481,16 +1425,6 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
 
-[[package]]
-name = "miniz_oxide"
-version = "0.8.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1fa76a2c86f704bdb222d66965fb3d63269ce38518b83cb0575fca855ebb6316"
-dependencies = [
- "adler2",
- "simd-adler32",
-]
-
 [[package]]
 name = "mio"
 version = "1.2.0"
@@ -1526,15 +1460,6 @@ dependencies = [
  "minimal-lexical",
 ]
 
-[[package]]
-name = "nom"
-version = "8.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "df9761775871bdef83bee530e60050f7e54b1105350d6884eb0fb4f46c2f9405"
-dependencies = [
- "memchr",
-]
-
 [[package]]
 name = "num-conv"
 version = "0.2.1"
@@ -1582,28 +1507,6 @@ version = "1.70.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "384b8ab6d37215f3c5301a95a4accb5d64aa607f1fcb26a11b5303878451b4fe"
 
-[[package]]
-name = "onig"
-version = "6.5.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "336b9c63443aceef14bea841b899035ae3abe89b7c486aaf4c5bd8aafedac3f0"
-dependencies = [
- "bitflags 2.11.0",
- "libc",
- "once_cell",
- "onig_sys",
-]
-
-[[package]]
-name = "onig_sys"
-version = "69.9.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c7f86c6eef3d6df15f23bcfb6af487cbd2fed4e5581d58d5bf1f5f8b7f6727dc"
-dependencies = [
- "cc",
- "pkg-config",
-]
-
 [[package]]
 name = "openssl-probe"
 version = "0.2.1"
@@ -1811,25 +1714,6 @@ version = "0.2.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a89322df9ebe1c1578d689c92318e070967d1042b512afbe49518723f4e6d5cd"
 
-[[package]]
-name = "pkg-config"
-version = "0.3.32"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7edddbd0b52d732b21ad9a5fab5c704c14cd949e5e9a1ec5929a24fded1b904c"
-
-[[package]]
-name = "plist"
-version = "1.8.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "740ebea15c5d1428f910cd1a5f52cebf8d25006245ed8ade92702f4943d91e07"
-dependencies = [
- "base64",
- "indexmap",
- "quick-xml",
- "serde",
- "time",
-]
-
 [[package]]
 name = "poc-memory"
 version = "0.4.0"
@@ -1903,16 +1787,6 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "439ee305def115ba05938db6eb1644ff94165c5ab5e9420d1c1bcedbba909391"
 
-[[package]]
-name = "pretty_assertions"
-version = "1.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3ae130e2f271fbc2ac3a40fb1d07180839cdbbe443c7a27e1e3c13c5cac0116d"
-dependencies = [
- "diff",
- "yansi",
-]
-
 [[package]]
 name = "prettyplease"
 version = "0.2.37"
@@ -1923,15 +1797,6 @@ dependencies = [
  "syn 2.0.117",
 ]
 
-[[package]]
-name = "proc-macro-crate"
-version = "3.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e67ba7e9b2b56446f1d419b1d807906278ffa1a658a8a5d8a39dcb1f5a78614f"
-dependencies = [
- "toml_edit",
-]
-
 [[package]]
 name = "proc-macro2"
 version = "1.0.106"
@@ -2012,15 +1877,6 @@ version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "007d8adb5ddab6f8e3f491ac63566a7d5002cc7ed73901f72057943fa71ae1ae"
 
-[[package]]
-name = "quick-xml"
-version = "0.38.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b66c2058c55a409d601666cffe35f04333cf1013010882cec174a7467cd4e21c"
-dependencies = [
- "memchr",
-]
-
 [[package]]
 name = "quote"
 version = "1.0.45"
@@ -2170,9 +2026,9 @@ dependencies = [
 
 [[package]]
 name = "redb"
-version = "2.6.3"
+version = "4.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8eca1e9d98d5a7e9002d0013e18d5a9b000aee942eb134883a82f06ebffb6c01"
+checksum = "67f7f231ea7b1172b7ac00ccf96b1250f0fb5a16d5585836aa4ebc997df7cbde"
 dependencies = [
  "libc",
 ]
@@ -2226,12 +2082,6 @@ version = "0.8.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dc897dd8d9e8bd1ed8cdad82b5966c3e0ecae09fb1907d58efaa013543185d0a"
 
-[[package]]
-name = "relative-path"
-version = "1.9.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ba39f3699c378cd8970968dcbff9c43159ea4cfbd88d43c00b22f2ef10a435d2"
-
 [[package]]
 name = "rend"
 version = "0.4.2"
@@ -2284,35 +2134,6 @@ dependencies = [
  "syn 1.0.109",
 ]
 
-[[package]]
-name = "rstest"
-version = "0.26.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f5a3193c063baaa2a95a33f03035c8a72b83d97a54916055ba22d35ed3839d49"
-dependencies = [
- "futures-timer",
- "futures-util",
- "rstest_macros",
-]
-
-[[package]]
-name = "rstest_macros"
-version = "0.26.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c845311f0ff7951c5506121a9ad75aec44d083c31583b2ea5a30bcb0b0abba0"
-dependencies = [
- "cfg-if",
- "glob",
- "proc-macro-crate",
- "proc-macro2",
- "quote",
- "regex",
- "relative-path",
- "rustc_version",
- "syn 2.0.117",
- "unicode-ident",
-]
-
 [[package]]
 name = "rustc-hash"
 version = "1.1.0"
@@ -2402,15 +2223,6 @@ version = "1.0.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9774ba4a74de5f7b1c1451ed6cd5285a32eddb5cccb8cc655a4e50009e06477f"
 
-[[package]]
-name = "same-file"
-version = "1.0.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "93fc1dc3aaa9bfed95e02e6eadabb4baf7e3078b0bd1b4d7b6b0b68378900502"
-dependencies = [
- "winapi-util",
-]
-
 [[package]]
 name = "schannel"
 version = "0.1.29"
@@ -2564,12 +2376,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "simd-adler32"
-version = "0.3.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "703d5c7ef118737c72f1af64ad2f6f8c5e1921f818cdcb97b8fe6fc69bf66214"
-
 [[package]]
 name = "simdutf8"
 version = "0.1.5"
@@ -2671,27 +2477,6 @@ dependencies = [
  "unicode-ident",
 ]
 
-[[package]]
-name = "syntect"
-version = "5.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "656b45c05d95a5704399aeef6bd0ddec7b2b3531b7c9e900abbf7c4d2190c925"
-dependencies = [
- "bincode",
- "flate2",
- "fnv",
- "once_cell",
- "onig",
- "plist",
- "regex-syntax",
- "serde",
- "serde_derive",
- "serde_json",
- "thiserror 2.0.18",
- "walkdir",
- "yaml-rust",
-]
-
 [[package]]
 name = "tap"
 version = "1.0.1"
@@ -2705,7 +2490,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d4ea810f0692f9f51b382fff5893887bb4580f5fa246fde546e0b13e7fcee662"
 dependencies = [
  "fnv",
- "nom 7.1.3",
+ "nom",
  "phf",
  "phf_codegen",
 ]
@@ -2823,14 +2608,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "743bd48c283afc0388f9b8827b976905fb217ad9e647fae3a379a9283c4def2c"
 dependencies = [
  "deranged",
- "itoa",
  "libc",
  "num-conv",
  "num_threads",
  "powerfmt",
  "serde_core",
  "time-core",
- "time-macros",
 ]
 
 [[package]]
@@ -2839,16 +2622,6 @@ version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7694e1cfe791f8d31026952abf09c69ca6f6fa4e1a1229e18988f06a04a12dca"
 
-[[package]]
-name = "time-macros"
-version = "0.2.27"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2e70e4c5a0e0a8a4823ad65dfe1a6930e4f4d756dcd9dd7939022b5e8c501215"
-dependencies = [
- "num-conv",
- "time-core",
-]
-
 [[package]]
 name = "tinyvec"
 version = "1.11.0"
@@ -2937,36 +2710,6 @@ dependencies = [
  "tokio",
 ]
 
-[[package]]
-name = "toml_datetime"
-version = "1.1.1+spec-1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3165f65f62e28e0115a00b2ebdd37eb6f3b641855f9d636d3cd4103767159ad7"
-dependencies = [
- "serde_core",
-]
-
-[[package]]
-name = "toml_edit"
-version = "0.25.10+spec-1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a82418ca169e235e6c399a84e395ab6debeb3bc90edc959bf0f48647c6a32d1b"
-dependencies = [
- "indexmap",
- "toml_datetime",
- "toml_parser",
- "winnow",
-]
-
-[[package]]
-name = "toml_parser"
-version = "1.1.2+spec-1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a2abe9b86193656635d2411dc43050282ca48aa31c2451210f4202550afb7526"
-dependencies = [
- "winnow",
-]
-
 [[package]]
 name = "try-lock"
 version = "0.2.5"
@@ -2976,16 +2719,12 @@ checksum = "e421abadd41a4225275504ea4d6566923418b7f05506fbc9c0fe86ba7396114b"
 [[package]]
 name = "tui-markdown"
 version = "0.3.7"
-source = "git+https://github.com/koverstreet/tui-markdown#bf275127d015f3a36aa90a39a4a967cbb37e4ece"
+source = "git+https://github.com/koverstreet/tui-markdown#9cca280718c4e74f14f53e6df2843abf3ef3dccd"
 dependencies = [
- "ansi-to-tui",
  "itertools",
  "log",
- "pretty_assertions",
  "pulldown-cmark",
  "ratatui-core",
- "rstest",
- "syntect",
 ]
 
 [[package]]
@@ -3103,16 +2842,6 @@ dependencies = [
  "utf8parse",
 ]
 
-[[package]]
-name = "walkdir"
-version = "2.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "29790946404f91d9c5d06f9874efddea1dc06c5efe94541a7d6863108e3a5e4b"
-dependencies = [
- "same-file",
- "winapi-util",
-]
-
 [[package]]
 name = "want"
 version = "0.3.1"
@@ -3322,15 +3051,6 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 
-[[package]]
-name = "winapi-util"
-version = "0.1.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c2a7b1c03c876122aa43f3020e6c3c3ee5c05081c9a00739faf7503aeba10d22"
-dependencies = [
- "windows-sys 0.61.2",
-]
-
 [[package]]
 name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"
@@ -3478,15 +3198,6 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
 
-[[package]]
-name = "winnow"
-version = "1.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "09dac053f1cd375980747450bfc7250c264eaae0583872e845c0c7cd578872b5"
-dependencies = [
- "memchr",
-]
-
 [[package]]
 name = "wit-bindgen"
 version = "0.51.0"
@@ -3584,15 +3295,6 @@ dependencies = [
  "tap",
 ]
 
-[[package]]
-name = "yaml-rust"
-version = "0.4.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "56c1936c4cc7a1c9ab21a1ebb602eb942ba868cbd44a99cb7cdc5892335e1c85"
-dependencies = [
- "linked-hash-map",
-]
-
 [[package]]
 name = "yansi"
 version = "1.0.1"
diff --git a/Cargo.toml b/Cargo.toml
index 614630a..758bfe3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -32,7 +32,7 @@ json5 = "1.3"
 
 crossterm = { version = "0.29", features = ["event-stream"] }
 ratatui = { version = "0.30", features = ["unstable-rendered-line-info"] }
-tui-markdown = { git = "https://github.com/koverstreet/tui-markdown", subdirectory = "tui-markdown" }
+tui-markdown = { git = "https://github.com/koverstreet/tui-markdown", subdirectory = "tui-markdown", default-features = false }
 tui-textarea = { version = "0.10.2", package = "tui-textarea-2" }
 
 uuid = { version = "1", features = ["v4"] }
@@ -46,7 +46,7 @@ memmap2 = "0.9"
 peg = "0.8"
 paste = "1"
 
-redb = "2"
+redb = "4"
 rkyv = { version = "0.7", features = ["validation", "std"] }
 
 rayon = "1"
diff --git a/src/hippocampus/counters.rs b/src/hippocampus/counters.rs
index 7166bf1..8d5b86e 100644
--- a/src/hippocampus/counters.rs
+++ b/src/hippocampus/counters.rs
@@ -7,7 +7,7 @@
 //   search_hits: key → u64   (how often memory-search found this node)
 //   last_hit_ts: key → i64   (unix timestamp of last search hit)
 
-use redb::{Database, ReadableTable, TableDefinition};
+use redb::{Database, ReadableDatabase, ReadableTable, TableDefinition};
 use std::path::PathBuf;
 
 const SEARCH_HITS: TableDefinition<&str, u64> = TableDefinition::new("search_hits");