From 427b99f4003cf93c6591c61fa509f1148912212d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9E=97=20=E9=A7=BF=E7=94=AB=20=28Shunsuke=20Hayashi=29?=
 <supernovasyun@gmail.com>
Date: Fri, 10 Apr 2026 15:03:49 +0900
Subject: [PATCH] refactor: make mergegate gate-first

---
 Cargo.lock                       | 1000 +-----------------------------
 Cargo.toml                       |   14 +-
 README.github.md                 |   19 +-
 README.md                        |  575 +++--------------
 crates/mergegate-cli/Cargo.toml  |    7 +-
 crates/mergegate-cli/src/main.rs |  270 +-------
 docs/USER_MANUAL.md              |  598 +++---------------
 7 files changed, 239 insertions(+), 2244 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 60a6895..70e3e5d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,12 +2,6 @@
 # It is not intended for manual editing.
 version = 3
 
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-name = "adler2"
-version = "2.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "320119579fcad9c21884f5c4861d16174d0e06250625266f50fe6898340abefa"
-
 [[package]]
 name = "aho-corasick"
 version = "1.1.4"
@@ -17,12 +11,6 @@ dependencies = [
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 ]
 
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-version = "0.2.21"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "683d7910e743518b0e34f1186f92494becacb047c7b6bf616c96772180fef923"
-
 [[package]]
 name = "android_system_properties"
 version = "0.1.5"
@@ -88,26 +76,6 @@ version = "1.0.100"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a23eb6b1614318a8071c9b2521f36b424b2c83db5eb3a0fead4a6c0809af6e61"
 
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0348a1c054491f4bfe6ab86a7b6ab1e44e45d899005de92f58b3df180b36ddaf"
-dependencies = [
- "clipboard-win",
- "image",
- "log",
- "objc2",
- "objc2-app-kit",
- "objc2-core-foundation",
- "objc2-core-graphics",
- "objc2-foundation",
- "parking_lot",
- "percent-encoding",
- "windows-sys 0.60.2",
- "x11rb",
-]
-
 [[package]]
 name = "async-trait"
 version = "0.1.89"
@@ -137,15 +105,6 @@ version = "0.22.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"
 
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b1f45e9417d87227c7a56d22e471c6206462cba514c7590c09aff4cf6d1ddcad"
-dependencies = [
- "serde",
-]
-
 [[package]]
 name = "bit-set"
 version = "0.8.0"
@@ -173,39 +132,12 @@ version = "3.19.0"
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 checksum = "46c5e41b57b8bba42a04676d81cb89e9ee8e859a1a66f80a5a72e1cb76b34d43"
 
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 [[package]]
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b35204fbdc0b3f4446b89fc1ac2cf84a8a68971995d0bf2e925ec7cd960f9cb3"
 
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-version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "df8670b8c7b9dae1793364eafadf7239c40d669904660c5960d74cfd80b46a53"
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@@ -284,174 +216,18 @@ version = "0.7.6"
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 checksum = "a1d728cc89cf3aee9ff92b05e62b19ee65a02b5702cff7d5a377e32c6ae29d8d"
 
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-dependencies = [
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-dependencies = [
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- "quote",
- "syn",
-]
-
 [[package]]
 name = "dirs"
 version = "5.0.1"
@@ -473,16 +249,6 @@ dependencies = [
  "windows-sys 0.48.0",
 ]
 
-[[package]]
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-version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "89a09f22a6c6069a18470eb92d2298acf25463f14256d24778e1230d789a2aec"
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- "bitflags",
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 name = "displaydoc"
 version = "0.2.5"
@@ -494,21 +260,6 @@ dependencies = [
  "syn",
 ]
 
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-name = "document-features"
-version = "0.2.12"
-source = "registry+https://github.com/rust-lang/crates.io-index"
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-
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@@ -525,75 +276,24 @@ dependencies = [
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 ]
 
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@@ -702,25 +402,6 @@ dependencies = [
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 ]
 
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@@ -769,28 +450,6 @@ version = "0.3.3"
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- "foldhash",
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-
 [[package]]
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 version = "0.16.1"
@@ -1010,12 +669,6 @@ dependencies = [
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 ]
 
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-
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@@ -1037,20 +690,6 @@ dependencies = [
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 ]
 
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- "num-traits",
- "png",
- "tiff",
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@@ -1058,29 +697,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0ad4bb2b565bca0645f4d68c5c9af97fba094e9791da685bf83cb5f3ce74acf2"
 dependencies = [
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- "hashbrown 0.16.1",
-]
-
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-dependencies = [
- "darling",
- "indoc",
- "proc-macro2",
- "quote",
- "syn",
+ "hashbrown",
 ]
 
 [[package]]
@@ -1105,15 +722,6 @@ version = "1.70.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a6cb138bb79a146c1bd460005623e142ef0181e3d0219cb493e02f7d08a35695"
 
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-dependencies = [
- "either",
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-
 [[package]]
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 version = "1.0.15"
@@ -1202,18 +810,6 @@ dependencies = [
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 ]
 
-[[package]]
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-version = "0.5.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
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@@ -1226,36 +822,12 @@ version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
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-dependencies = [
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-dependencies = [
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-
 [[package]]
 name = "lru-slab"
 version = "0.1.2"
@@ -1284,10 +856,7 @@ dependencies = [
  "anyhow",
  "chrono",
  "clap",
- "crossterm 0.29.0",
  "mergegate-core",
- "mergegate-tui",
- "ratatui",
  "serde",
  "serde_json",
  "tokio",
@@ -1322,39 +891,6 @@ dependencies = [
  "uuid",
 ]
 
-[[package]]
-name = "mergegate-tui"
-version = "0.1.0"
-dependencies = [
- "anyhow",
- "arboard",
- "chrono",
- "crossterm 0.29.0",
- "futures",
- "mergegate-core",
- "once_cell",
- "pulldown-cmark",
- "ratatui",
- "serde",
- "serde_json",
- "syntect",
- "textwrap",
- "thiserror 2.0.17",
- "tokio",
- "unicode-width 0.2.0",
- "uuid",
-]
-
-[[package]]
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-checksum = "1fa76a2c86f704bdb222d66965fb3d63269ce38518b83cb0575fca855ebb6316"
-dependencies = [
- "adler2",
- "simd-adler32",
-]
-
 [[package]]
 name = "mio"
 version = "1.1.0"
@@ -1362,21 +898,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "69d83b0086dc8ecf3ce9ae2874b2d1290252e2a30720bea58a5c6639b0092873"
 dependencies = [
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- "log",
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  "windows-sys 0.61.2",
 ]
 
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0fbdd3d7436f8b5e892b8b7ea114271ff0fa00bc5acae845d53b07d498616ef6"
-dependencies = [
- "num-traits",
- "pxfm",
-]
-
 [[package]]
 name = "nu-ansi-term"
 version = "0.50.3"
@@ -1386,12 +911,6 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
-[[package]]
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-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "51d515d32fb182ee37cda2ccdcb92950d6a3c2893aa280e540671c2cd0f3b1d9"
-
 [[package]]
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 version = "0.2.19"
@@ -1401,79 +920,6 @@ dependencies = [
  "autocfg",
 ]
 
-[[package]]
-name = "objc2"
-version = "0.6.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b7c2599ce0ec54857b29ce62166b0ed9b4f6f1a70ccc9a71165b6154caca8c05"
-dependencies = [
- "objc2-encode",
-]
-
-[[package]]
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-dependencies = [
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- "objc2",
- "objc2-core-graphics",
- "objc2-foundation",
-]
-
-[[package]]
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-dependencies = [
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- "dispatch2",
- "objc2",
-]
-
-[[package]]
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-dependencies = [
- "bitflags",
- "dispatch2",
- "objc2",
- "objc2-core-foundation",
- "objc2-io-surface",
-]
-
-[[package]]
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-checksum = "ef25abbcd74fb2609453eb695bd2f860d389e457f67dc17cafc8b8cbc89d0c33"
-
-[[package]]
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-dependencies = [
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- "objc2",
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-
-[[package]]
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-dependencies = [
- "bitflags",
- "objc2",
- "objc2-core-foundation",
-]
-
 [[package]]
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 version = "1.21.3"
@@ -1486,28 +932,6 @@ version = "1.70.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "384b8ab6d37215f3c5301a95a4accb5d64aa607f1fcb26a11b5303878451b4fe"
 
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "336b9c63443aceef14bea841b899035ae3abe89b7c486aaf4c5bd8aafedac3f0"
-dependencies = [
- "bitflags",
- "libc",
- "once_cell",
- "onig_sys",
-]
-
-[[package]]
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-version = "69.9.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c7f86c6eef3d6df15f23bcfb6af487cbd2fed4e5581d58d5bf1f5f8b7f6727dc"
-dependencies = [
- "cc",
- "pkg-config",
-]
-
 [[package]]
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 version = "0.1.6"
@@ -1542,35 +966,6 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "04744f49eae99ab78e0d5c0b603ab218f515ea8cfe5a456d7629ad883a3b6e7d"
 
-[[package]]
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-version = "0.12.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "93857453250e3077bd71ff98b6a65ea6621a19bb0f559a85248955ac12c45a1a"
-dependencies = [
- "lock_api",
- "parking_lot_core",
-]
-
-[[package]]
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-version = "0.9.12"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2621685985a2ebf1c516881c026032ac7deafcda1a2c9b7850dc81e3dfcb64c1"
-dependencies = [
- "cfg-if",
- "libc",
- "redox_syscall",
- "smallvec",
- "windows-link",
-]
-
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "57c0d7b74b563b49d38dae00a0c37d4d6de9b432382b2892f0574ddcae73fd0a"
-
 [[package]]
 name = "percent-encoding"
 version = "2.3.2"
@@ -1595,32 +990,6 @@ 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]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "97baced388464909d42d89643fe4361939af9b7ce7a31ee32a168f832a70f2a0"
-dependencies = [
- "bitflags",
- "crc32fast",
- "fdeflate",
- "flate2",
- "miniz_oxide",
-]
-
 [[package]]
 name = "potential_utf"
 version = "0.1.4"
@@ -1630,12 +999,6 @@ dependencies = [
  "zerovec",
 ]
 
-[[package]]
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-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "439ee305def115ba05938db6eb1644ff94165c5ab5e9420d1c1bcedbba909391"
-
 [[package]]
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 version = "0.2.21"
@@ -1673,55 +1036,12 @@ dependencies = [
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 ]
 
-[[package]]
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-version = "0.12.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
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-dependencies = [
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- "getopts",
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- "pulldown-cmark-escape",
- "unicase",
-]
-
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-
-[[package]]
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-dependencies = [
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-]
-
 [[package]]
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 checksum = "a1d01941d82fa2ab50be1e79e6714289dd7cde78eba4c074bc5a4374f650dfe0"
 
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a993555f31e5a609f617c12db6250dedcac1b0a85076912c436e6fc9b2c8e6a3"
-
-[[package]]
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-checksum = "b66c2058c55a409d601666cffe35f04333cf1013010882cec174a7467cd4e21c"
-dependencies = [
- "memchr",
-]
-
 [[package]]
 name = "quinn"
 version = "0.11.9"
@@ -1830,36 +1150,6 @@ dependencies = [
  "rand_core",
 ]
 
-[[package]]
-name = "ratatui"
-version = "0.29.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "eabd94c2f37801c20583fc49dd5cd6b0ba68c716787c2dd6ed18571e1e63117b"
-dependencies = [
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- "cassowary",
- "compact_str",
- "crossterm 0.28.1",
- "indoc",
- "instability",
- "itertools",
- "lru",
- "paste",
- "strum",
- "unicode-segmentation",
- "unicode-truncate",
- "unicode-width 0.2.0",
-]
-
-[[package]]
-name = "redox_syscall"
-version = "0.5.18"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ed2bf2547551a7053d6fdfafda3f938979645c44812fbfcda098faae3f1a362d"
-dependencies = [
- "bitflags",
-]
-
 [[package]]
 name = "redox_users"
 version = "0.4.6"
@@ -1961,19 +1251,6 @@ version = "2.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "357703d41365b4b27c590e3ed91eabb1b663f07c4c084095e60cbed4362dff0d"
 
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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-dependencies = [
- "bitflags",
- "errno",
- "libc",
- "linux-raw-sys 0.4.15",
- "windows-sys 0.59.0",
-]
-
 [[package]]
 name = "rustix"
 version = "1.1.2"
@@ -1983,7 +1260,7 @@ dependencies = [
  "bitflags",
  "errno",
  "libc",
- "linux-raw-sys 0.11.0",
+ "linux-raw-sys",
  "windows-sys 0.61.2",
 ]
 
@@ -2035,7 +1312,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cc6bf79ff24e648f6da1f8d1f011e9cac26491b619e6b9280f2b47f1774e6ee2"
 dependencies = [
  "fnv",
- "quick-error 1.2.3",
+ "quick-error",
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  "wait-timeout",
 ]
@@ -2046,21 +1323,6 @@ version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "28d3b2b1366ec20994f1fd18c3c594f05c5dd4bc44d8bb0c1c632c8d6829481f"
 
-[[package]]
-name = "same-file"
-version = "1.0.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "93fc1dc3aaa9bfed95e02e6eadabb4baf7e3078b0bd1b4d7b6b0b68378900502"
-dependencies = [
- "winapi-util",
-]
-
-[[package]]
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-
 [[package]]
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 version = "1.0.228"
@@ -2153,27 +1415,6 @@ version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0fda2ff0d084019ba4d7c6f371c95d8fd75ce3524c3cb8fb653a3023f6323e64"
 
-[[package]]
-name = "signal-hook"
-version = "0.3.18"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d881a16cf4426aa584979d30bd82cb33429027e42122b169753d6ef1085ed6e2"
-dependencies = [
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- "signal-hook-registry",
-]
-
-[[package]]
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-dependencies = [
- "libc",
- "mio",
- "signal-hook",
-]
-
 [[package]]
 name = "signal-hook-registry"
 version = "1.4.6"
@@ -2183,12 +1424,6 @@ dependencies = [
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 ]
 
-[[package]]
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-version = "0.3.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
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-
 [[package]]
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 version = "0.4.11"
@@ -2201,12 +1436,6 @@ version = "1.15.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "67b1b7a3b5fe4f1376887184045fcf45c69e92af734b7aaddc05fb777b6fbd03"
 
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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-
 [[package]]
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 version = "0.6.1"
@@ -2223,40 +1452,12 @@ version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6ce2be8dc25455e1f91df71bfa12ad37d7af1092ae736f3a6cd0e37bc7810596"
 
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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-
 [[package]]
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 checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
 
-[[package]]
-name = "strum"
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8fec0f0aef304996cf250b31b5a10dee7980c85da9d759361292b8bca5a18f06"
-dependencies = [
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-]
-
-[[package]]
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- "proc-macro2",
- "quote",
- "rustversion",
- "syn",
-]
-
 [[package]]
 name = "subtle"
 version = "2.6.1"
@@ -2294,27 +1495,6 @@ dependencies = [
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 ]
 
-[[package]]
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-version = "5.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
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- "serde",
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- "serde_json",
- "thiserror 2.0.17",
- "walkdir",
- "yaml-rust",
-]
-
 [[package]]
 name = "tempfile"
 version = "3.23.0"
@@ -2324,21 +1504,10 @@ dependencies = [
  "fastrand",
  "getrandom 0.3.4",
  "once_cell",
- "rustix 1.1.2",
+ "rustix",
  "windows-sys 0.61.2",
 ]
 
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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- "unicode-width 0.2.0",
-]
-
 [[package]]
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 version = "1.0.69"
@@ -2388,51 +1557,6 @@ dependencies = [
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 ]
 
-[[package]]
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-dependencies = [
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-dependencies = [
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- "time-macros",
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-
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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-
-[[package]]
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- "time-core",
-]
-
 [[package]]
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 version = "0.8.2"
@@ -2680,53 +1804,12 @@ version = "0.1.4"
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 checksum = "eaea85b334db583fe3274d12b4cd1880032beab409c0d774be044d4480ab9a94"
 
-[[package]]
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-[[package]]
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-
-[[package]]
-name = "unicode-segmentation"
-version = "1.12.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f6ccf251212114b54433ec949fd6a7841275f9ada20dddd2f29e9ceea4501493"
-
-[[package]]
-name = "unicode-truncate"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b3644627a5af5fa321c95b9b235a72fd24cd29c648c2c379431e6628655627bf"
-dependencies = [
- "itertools",
- "unicode-segmentation",
- "unicode-width 0.1.14",
-]
-
-[[package]]
-name = "unicode-width"
-version = "0.1.14"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7dd6e30e90baa6f72411720665d41d89b9a3d039dc45b8faea1ddd07f617f6af"
-
-[[package]]
-name = "unicode-width"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1fc81956842c57dac11422a97c3b8195a1ff727f06e85c84ed2e8aa277c9a0fd"
-
 [[package]]
 name = "unsafe-libyaml"
 version = "0.2.11"
@@ -2796,16 +1879,6 @@ dependencies = [
  "libc",
 ]
 
-[[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"
@@ -2930,12 +2003,6 @@ dependencies = [
  "rustls-pki-types",
 ]
 
-[[package]]
-name = "weezl"
-version = "0.1.12"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a28ac98ddc8b9274cb41bb4d9d4d5c425b6020c50c46f25559911905610b4a88"
-
 [[package]]
 name = "winapi"
 version = "0.3.9"
@@ -2952,15 +2019,6 @@ 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"
@@ -3044,15 +2102,6 @@ dependencies = [
  "windows-targets 0.52.6",
 ]
 
-[[package]]
-name = "windows-sys"
-version = "0.59.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e38bc4d79ed67fd075bcc251a1c39b32a1776bbe92e5bef1f0bf1f8c531853b"
-dependencies = [
- "windows-targets 0.52.6",
-]
-
 [[package]]
 name = "windows-sys"
 version = "0.60.2"
@@ -3278,32 +2327,6 @@ version = "0.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9edde0db4769d2dc68579893f2306b26c6ecfbe0ef499b013d731b7b9247e0b9"
 
-[[package]]
-name = "x11rb"
-version = "0.13.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9993aa5be5a26815fe2c3eacfc1fde061fc1a1f094bf1ad2a18bf9c495dd7414"
-dependencies = [
- "gethostname",
- "rustix 1.1.2",
- "x11rb-protocol",
-]
-
-[[package]]
-name = "x11rb-protocol"
-version = "0.13.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ea6fc2961e4ef194dcbfe56bb845534d0dc8098940c7e5c012a258bfec6701bd"
-
-[[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 = "yoke"
 version = "0.8.1"
@@ -3406,18 +2429,3 @@ dependencies = [
  "quote",
  "syn",
 ]
-
-[[package]]
-name = "zune-core"
-version = "0.4.12"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3f423a2c17029964870cfaabb1f13dfab7d092a62a29a89264f4d36990ca414a"
-
-[[package]]
-name = "zune-jpeg"
-version = "0.4.21"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "29ce2c8a9384ad323cf564b67da86e21d3cfdff87908bc1223ed5c99bc792713"
-dependencies = [
- "zune-core",
-]
diff --git a/Cargo.toml b/Cargo.toml
index e597be3..017f7f5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,6 @@
 resolver = "2"
 members = [
     "crates/mergegate-cli",
-    "crates/mergegate-tui",
     "crates/mergegate-core",
 ]
 
@@ -14,8 +13,8 @@ authors = ["Miyabi Team"]
 license = "BUSL-1.1"
 repository = "https://github.com/ShunsukeHayashi/mergegate"
 homepage = "https://github.com/ShunsukeHayashi/mergegate"
-description = "MergeGate - Deterministic task execution and merge workflow for AI-assisted development"
-keywords = ["ai", "cli", "tui", "autonomous", "development"]
+description = "MergeGate - Engine-agnostic gate CLI for deterministic task execution in AI-assisted development"
+keywords = ["ai", "cli", "workflow", "merge", "development"]
 categories = ["command-line-utilities", "development-tools"]
 
 [workspace.dependencies]
@@ -24,15 +23,6 @@ tokio = { version = "1", features = ["rt-multi-thread", "macros", "io-std", "syn
 futures = "0.3"
 async-trait = "0.1"
 
-# TUI Framework
-ratatui = { version = "0.29.0", features = [
-    "scrolling-regions",
-    "unstable-backend-writer",
-    "unstable-rendered-line-info",
-    "unstable-widget-ref",
-] }
-crossterm = { version = "0.29.0", features = ["bracketed-paste", "event-stream"] }
-
 # Text Processing
 textwrap = "0.16"
 unicode-width = "0.2"
diff --git a/README.github.md b/README.github.md
index ba85080..c1bba54 100644
--- a/README.github.md
+++ b/README.github.md
@@ -1,13 +1,22 @@
 # MergeGate
-Deterministic execution protocol for AI-assisted development.
+Engine-agnostic gate CLI for AI-assisted development.
 
 Execution layer for GitNexus-style code intelligence:
 - `GitNexus`: understand the codebase
 - `MergeGate`: execute changes safely
 
-Current CLI entrypoints: `miyabi` and `mergegate`
+Core product:
+- `mergegate gate ...`
+- `miyabi gate ...` (compatibility alias)
 
-- `miyabi tui` / `mergegate tui`: terminal assistant
-- `miyabi gate` / `mergegate gate`: deterministic task execution, file locks, and PR/merge workflow
+MergeGate is designed to sit in front of Claude Code, Codex, Gemini CLI, and other coding agents. The engine can change. The gate protocol should not.
+
+Start with:
+
+```bash
+cargo build --release
+./target/release/mergegate gate status
+./target/release/mergegate gate init
+./target/release/mergegate gate guide
+```
 
-Start with `cargo build --release`, then run `./target/release/mergegate --help` or `./target/release/mergegate gate guide`.
diff --git a/README.md b/README.md
index 1b256a6..0067cfa 100644
--- a/README.md
+++ b/README.md
@@ -1,55 +1,68 @@
 # MergeGate
 
-MergeGate is a deterministic execution protocol for AI-assisted development.
-It is the execution layer for GitNexus-style code intelligence: GitNexus helps agents understand what will break, and MergeGate makes them execute that work in a safe, verifiable order.
+MergeGate is an engine-agnostic gate CLI for AI-assisted development.
+
+It does not need to be your coding agent, your chat runtime, or your terminal UI. Its job is simpler and more durable:
+
+- register work
+- record impact
+- lock files
+- assign execution
+- track branch and PR state
+- verify completion
 
 In short:
 
 - `GitNexus`: understand the codebase
 - `MergeGate`: execute changes safely
 
-The project currently supports both `miyabi` and `mergegate` as CLI entrypoints. `miyabi` remains the legacy/default command, and `mergegate` is the product-aligned alias.
+MergeGate is designed to sit in front of coding agents such as Claude Code, Codex, and Gemini CLI. The execution engine can change. The gate protocol should not.
 
-This repository has two common entry points:
+## What This Project Is
 
-- `miyabi tui` / `mergegate tui`: interactive terminal assistant
-- `miyabi gate` / `mergegate gate`: deterministic task execution and file-lock workflow for repo work
+MergeGate is a repo workflow tool for deterministic execution.
 
-If you arrived here because of deterministic execution, task locks, PR gates, or agent-safe repo work, start with `mergegate gate` or `miyabi gate`, not the TUI.
+The core product is:
+
+- `miyabi gate ...`
+- `mergegate gate ...`
+
+The binary still supports both `miyabi` and `mergegate` entrypoints today. `mergegate` is the product-aligned command. `miyabi` remains as a compatibility alias.
 
 ## 60-Second Setup
 
 ```bash
-# 1. Clone and build
 git clone https://github.com/ShunsukeHayashi/mergegate.git
 cd mergegate
 cargo build --release
 
-# 2. Set API key
-export ANTHROPIC_API_KEY="sk-ant-..."
-
-# 3. Run
-./target/release/mergegate tui
+./target/release/mergegate gate status
+./target/release/mergegate gate init
+./target/release/mergegate gate guide
 ```
 
-That's it. Start with the TUI, or jump straight into `mergegate gate` for repo workflow control.
-
----
+No API key is required for gate workflow.
 
 ## Why MergeGate
 
-- **Execution layer for code intelligence** - Pair blast-radius understanding with deterministic execution, not chat-only automation
-- **Deterministic task execution** - Register, analyze, lock, review, and merge in a verifiable order
-- **Repo-safe agent workflow** - File locks and gate checks reduce accidental overlap and unsafe edits
-- **Interactive TUI** - Terminal assistant for chat, prompts, and agent execution
-- **Agent mode** - Autonomous execution with tool approval
-- **Session management** - Persist and resume conversations
-- **Configurable** - TOML-based configuration
+- **Engine agnostic**: Use Claude Code, Codex, Gemini CLI, or another agent runtime
+- **Deterministic execution**: Register, analyze, lock, implement, review, and merge in a verifiable order
+- **Repo-safe coordination**: Reduce accidental overlap with file locks and explicit task ownership
+- **Execution ledger**: Keep branch, PR, merge, and completion state tied to actual work
+- **Protocol over chat**: The product is the workflow gate, not a built-in assistant
 
 ## Positioning
 
-MergeGate was designed for teams that already believe code understanding is not enough.
-Knowing the blast radius of a change is only half of the problem. Agents also need a protocol for when work starts, which files are locked, what must be recorded before editing, and what counts as done.
+MergeGate exists because understanding code is not enough.
+
+Agents also need a protocol for:
+
+- when a task starts
+- which files are locked
+- what impact was recorded
+- who is implementing
+- how branch and PR state are attached
+- what counts as done
 
 That is the role split:
 
@@ -63,7 +76,6 @@ If GitNexus answers "what is this change connected to?", MergeGate answers "how
 ### Prerequisites
 
 - Rust 1.70+
-- Anthropic API key
 
 ### Build from Source
 
@@ -77,75 +89,34 @@ Binary will be at `target/release/miyabi` and `target/release/mergegate`.
 
 ## Quick Start
 
-Choose the path that matches what you want to do.
-
-### A. Use MergeGate as a terminal assistant
-
-Run the TUI after configuring your API key.
-
-#### 1. Generate Config
+### 1. Check repo status
 
 ```bash
-./target/release/miyabi init
+./target/release/mergegate gate status
 ```
 
-This creates `~/.miyabi/config.toml`.
+If you see `tasks: 0`, the ledger exists and is simply empty.
 
-#### 2. Set API Key
-
-Edit `~/.miyabi/config.toml`:
-
-```toml
-[api]
-api_key = "sk-ant-..."
-```
-
-Or use environment variable:
+### 2. Initialize gate ledger if needed
 
 ```bash
-export ANTHROPIC_API_KEY="sk-ant-..."
+./target/release/mergegate gate init
 ```
 
-#### 3. Launch TUI
+This creates `project_memory/tasks.json`.
+
+### 3. Read the built-in workflow guide
 
 ```bash
-./target/release/miyabi tui
-# or simply
-./target/release/miyabi
+./target/release/mergegate gate guide
 ```
 
-### B. Use MergeGate as a task execution gate
-
-If you are working inside a repository and want task registration, impact tracking, file locks, and PR/merge recording, use `mergegate gate` or `miyabi gate`.
-
-#### 1. Check whether the repo is already initialized
+### 4. Start a task
 
 ```bash
-./target/release/miyabi gate status
-```
-
-If you see `tasks: 0`, that means the ledger exists but is currently empty.
-
-#### 2. Initialize MergeGate for this repo if needed
-
-```bash
-./target/release/miyabi gate init
-```
-
-This creates `project_memory/tasks.json` and prepares the repo for gate-managed work.
-
-#### 3. Read the built-in workflow guide
-
-```bash
-./target/release/miyabi gate guide
-```
-
-#### 4. Start a task
-
-```bash
-./target/release/miyabi gate register --issue 123 --title "Fix login redirect"
-./target/release/miyabi gate impact issue-123 --risk medium --symbols 3
-./target/release/miyabi gate assign issue-123 --agent codex --node macbook --files "src/auth.rs"
+./target/release/mergegate gate register --issue 123 --title "Fix login redirect"
+./target/release/mergegate gate impact issue-123 --risk medium --symbols 3
+./target/release/mergegate gate assign issue-123 --agent codex --node macbook --files "src/auth.rs"
 ```
 
 Typical flow:
@@ -153,427 +124,83 @@ Typical flow:
 1. `register`
 2. `impact`
 3. `assign`
-4. implement
+4. implement with your coding agent of choice
 5. `branch`
 6. `pr`
 7. `merge` or `manual-complete`
 
 ## Usage
 
-`MergeGate` is the product and documentation name.
-Both `miyabi` and `mergegate` work today.
+```bash
+mergegate gate status
+mergegate gate init
+mergegate gate guide
+mergegate gate register --issue 123 --title "Fix login redirect"
+mergegate gate impact issue-123 --risk medium --symbols 3
+mergegate gate assign issue-123 --agent codex --node macbook --files "src/auth.rs"
+mergegate gate branch issue-123 codex/fix-login-redirect
+mergegate gate pr issue-123 456
+mergegate gate merge issue-123 <sha>
+```
 
-### CLI Commands
+Compatibility alias:
 
 ```bash
-miyabi                    # Start TUI (default)
-miyabi tui                # Start TUI explicitly
-miyabi status             # Show status
-miyabi init               # Generate default config
-miyabi sessions           # List sessions
-miyabi sessions -d <id>   # Delete session
-miyabi sessions -e <id>   # Export session to JSON
-miyabi version            # Show version info
-miyabi agent <prompt>     # Run autonomous agent
-miyabi gate status        # Show task ledger status
-miyabi gate init          # Initialize MergeGate in the current repo
-miyabi gate guide         # Show the full gate workflow guide
-mergegate gate status     # Same gate workflow with product-aligned command
-mergegate tui             # Same TUI with product-aligned command
+miyabi gate status
 ```
 
-### CLI Options
+## Core Commands
 
 ```bash
-miyabi --model claude-sonnet-4-5-20250929    # Override model
-miyabi --max-tokens 16384                     # Override max tokens
-miyabi --thinking                             # Enable extended thinking
-miyabi --config /path/to/config.toml          # Custom config
-miyabi --session <id>                         # Resume session
+mergegate gate status
+mergegate gate init
+mergegate gate guide
+mergegate gate register --issue 123 --title "Fix login redirect"
+mergegate gate assign issue-123 --agent codex --node macbook --files "src/auth.rs"
+mergegate gate impact issue-123 --risk medium --symbols 3
+mergegate gate branch issue-123 codex/fix-login-redirect
+mergegate gate pr issue-123 456
+mergegate gate merge issue-123 <sha>
+mergegate gate manual-complete issue-123 --reason "docs-only change" --operator shunsuke
+mergegate gate locks
+mergegate gate dispatchable
+mergegate gate dag
 ```
 
-### TUI Keybindings
+## Product Direction
 
-| Key | Action |
-|-----|--------|
-| `Enter` | Send message |
-| `Ctrl+P` | Command palette |
-| `F1` | Help |
-| `Esc` | Close overlay / Cancel |
-| `Ctrl+C` | Quit |
-| `j/k` | Scroll down/up |
-| `Page Up/Down` | Page scroll |
+MergeGate is intentionally moving away from:
 
-## Configuration
+- built-in TUI as the product center
+- built-in agent runtime as the product center
+- vendor-specific backend identity
 
-Config file: `~/.miyabi/config.toml`
+The durable surface is the gate CLI.
 
-```toml
-[api]
-api_key = "sk-ant-..."                        # Anthropic API key
-model = "claude-sonnet-4-5-20250929"          # Model to use
-max_tokens = 8192                             # Max response tokens
-thinking = false                              # Extended thinking
-system_prompt = "You are a helpful assistant" # System prompt
-timeout_secs = 120                            # Request timeout
-max_retries = 3                               # Retry attempts
+## Workspace Layout
 
-[ui]
-show_sidebar = false      # Show sidebar
-show_status_bar = true    # Show status bar
-show_breadcrumb = true    # Show breadcrumb
-theme = "tokyo-night"     # Color theme
-vim_mode = false          # Vim keybindings
-show_line_numbers = true  # Line numbers in code
-
-[session]
-auto_save = true          # Auto-save sessions
-auto_save_interval = 30   # Save interval (seconds)
-max_sessions = 100        # Max stored sessions
-
-[tools]
-enable_bash = true        # Enable bash tool
-enable_file_tools = true  # Enable file read/write
-enable_search_tools = true # Enable glob/grep
-auto_approve_low_risk = false # Auto-approve safe tools
-bash_timeout = 120        # Bash command timeout
+```text
+crates/
+  mergegate-cli/   # CLI entrypoint
+  mergegate-core/  # Gate protocol, store, locks, workflow logic
+project_memory/
+  tasks.json       # Execution ledger
+skills/
+  mergegate-cli/
+  mergegate-ops/
 ```
 
-### Environment Variables
-
-Override config with environment variables:
-
-```bash
-ANTHROPIC_API_KEY=...     # API key
-MIYABI_MODEL=...          # Model name
-MIYABI_MAX_TOKENS=...     # Max tokens
-MIYABI_THINKING=true      # Enable thinking
-```
-
-## Agent Mode
-
-Run autonomous tasks with tool execution:
-
-```bash
-# Basic usage
-miyabi agent "Create a hello world Python script"
-
-# With options
-miyabi agent "Refactor the utils module" \
-  --max-iterations 20 \
-  --auto-approve \
-  --system "You are an expert Rust developer"
-```
-
-Agent mode features:
-- Autonomous tool execution (bash, file operations, search)
-- Approval workflow for risky operations
-- Iteration limits for safety
-- JSON output format option
-
-## Core Library Features
-
-The `mergegate-core` crate provides powerful utilities for building AI applications.
-
-### Git Utilities
-
-```rust
-use miyabi_core::{find_git_root, get_current_branch, is_in_git_repo};
-
-// Find repository root
-let root = find_git_root()?;
-
-// Get current branch
-let branch = get_current_branch(&root)?;
-
-// Check if in git repo
-if is_in_git_repo(&path) {
-    println!("In a git repository");
-}
-```
-
-### Logger System
-
-```rust
-use miyabi_core::{init_logger, LogLevel, LogFormat};
-
-// Initialize with defaults
-init_logger();
-
-// Or with custom config
-use miyabi_core::LoggerConfig;
-let config = LoggerConfig {
-    level: LogLevel::Debug,
-    format: LogFormat::Json,
-    ..Default::default()
-};
-init_logger_with_config(config);
-```
-
-### Retry with Backoff
-
-```rust
-use miyabi_core::{retry_with_backoff, BackoffRetryConfig};
-
-let config = BackoffRetryConfig::default();
-let result = retry_with_backoff(config, || async {
-    // Your operation that might fail
-    make_api_call().await
-}).await?;
-```
-
-### Circuit Breaker
-
-```rust
-use miyabi_core::{CircuitBreaker, CircuitState};
-
-let breaker = CircuitBreaker::default();
-
-let result = breaker.call(|| {
-    Box::pin(async {
-        // Your operation
-        Ok::<_, std::io::Error>(())
-    })
-}).await;
-
-// Check state
-match breaker.state().await {
-    CircuitState::Closed => println!("Normal operation"),
-    CircuitState::Open => println!("Circuit open - blocking calls"),
-    CircuitState::HalfOpen => println!("Testing recovery"),
-}
-```
-
-### Rules System (.miyabirules)
-
-Support for project-specific rules via `.miyabirules` files:
-
-```yaml
-# .miyabirules
-version: 1
-rules:
-  - name: "no-unwrap"
-    pattern: ".unwrap()"
-    suggestion: "Use ? operator or proper error handling"
-    file_extensions: ["rs"]
-    severity: "warning"
-
-agent_preferences:
-  codegen:
-    style: "functional"
-    error_handling: "result"
-```
-
-```rust
-use miyabi_core::{RulesLoader, MiyabiRules};
-
-let loader = RulesLoader::new(project_root);
-let rules = loader.load_or_default()?;
-
-// Get rules for a file
-let applicable = rules.rules_for_file(Path::new("src/main.rs"));
-```
-
-### Cache System
-
-```rust
-use miyabi_core::{create_llm_cache, create_api_cache, LLMCacheKey};
-
-// LLM response cache (1 hour TTL)
-let cache = create_llm_cache();
-let key = LLMCacheKey::new("prompt", "model", Some(0.7));
-
-cache.insert(key.clone(), "response".to_string()).await;
-let cached = cache.get(&key).await;
-
-// API cache (30 min TTL)
-let api_cache = create_api_cache();
-```
-
-### Plugin System
-
-```rust
-use miyabi_core::{Plugin, PluginManager, PluginMetadata, PluginContext, PluginResult};
-use anyhow::Result;
-
-struct MyPlugin;
-
-impl Plugin for MyPlugin {
-    fn metadata(&self) -> PluginMetadata {
-        PluginMetadata {
-            name: "my-plugin".to_string(),
-            version: "1.0.0".to_string(),
-            description: Some("My custom plugin".to_string()),
-            author: None,
-        }
-    }
-
-    fn init(&mut self) -> Result<()> {
-        Ok(())
-    }
-
-    fn execute(&self, ctx: &PluginContext) -> Result<PluginResult> {
-        Ok(PluginResult {
-            success: true,
-            message: Some("Done".to_string()),
-            data: None,
-        })
-    }
-}
-
-// Register and execute
-let manager = PluginManager::new();
-manager.register(Box::new(MyPlugin))?;
-let result = manager.execute("my-plugin", &PluginContext::default())?;
-```
-
-### Feature Flags
-
-```rust
-use miyabi_core::{FeatureFlagManager, FeatureFlag};
-
-let flags = FeatureFlagManager::new();
-
-// Simple flag
-flags.set_flag("new_feature", true);
-
-if flags.is_enabled("new_feature") {
-    // Use new feature
-}
-
-// With rollout percentage
-flags.set_flag_with_options(
-    "beta_feature",
-    true,
-    Some("Beta testing".to_string()),
-    Some(0.5), // 50% rollout
-);
-
-// Load from config
-use std::collections::HashMap;
-let mut config = HashMap::new();
-config.insert("flag1".to_string(), true);
-flags.load_from_map(config);
-```
-
-## Project Structure
-
-```
-mergegate/
-├── crates/
-│   ├── mergegate-cli/      # CLI entry point
-│   ├── mergegate-core/     # Core library
-│   │   ├── agent.rs        # Agent system
-│   │   ├── anthropic.rs    # Anthropic API client
-│   │   ├── cache.rs        # TTL cache system
-│   │   ├── config.rs       # Configuration
-│   │   ├── error_policy.rs # Circuit breaker
-│   │   ├── feature_flags.rs # Feature flag management
-│   │   ├── git.rs          # Git utilities
-│   │   ├── logger.rs       # Logging system
-│   │   ├── plugin.rs       # Plugin system
-│   │   ├── retry.rs        # Retry with backoff
-│   │   ├── rules.rs        # .miyabirules support
-│   │   ├── session.rs      # Session management
-│   │   ├── tools.rs        # Built-in tools
-│   │   └── ...
-│   └── mergegate-tui/      # TUI implementation
-│       ├── app.rs          # Main application
-│       ├── views.rs        # UI views
-│       └── ...
-├── .miyabi/                # Local config
-├── Cargo.toml              # Workspace config
-└── README.md
-```
-
-## Development
-
-### Build
-
-```bash
-cargo build              # Debug build
-cargo build --release    # Release build
-```
-
-### Test
-
-```bash
-cargo test --all         # Run all tests
-```
-
-### Lint
-
-```bash
-cargo clippy --all-targets -- -D warnings
-cargo fmt --all --check
-```
-
-## Models
-
-Supported models:
-- `claude-sonnet-4-5-20250929` (default)
-- `claude-haiku-4-5-20251001`
-- `claude-sonnet-4-20250514`
-
 ## Troubleshooting
 
-### Common Issues
+### `gate status` says `tasks: 0`
 
-#### "API key not found"
-```bash
-# Check if environment variable is set
-echo $ANTHROPIC_API_KEY
+That is not an error. It means the ledger exists but no tasks have been registered yet.
 
-# Or add to config file
-vim ~/.miyabi/config.toml
-# [api]
-# api_key = "sk-ant-..."
-```
+### `gate init` says the project is already initialized
 
-#### "Device not configured" error on TUI start
-This usually means the terminal doesn't support the required features. Try:
-```bash
-# Use a different terminal emulator (iTerm2, Alacritty, etc.)
-# Or run with explicit terminal type
-TERM=xterm-256color ./target/release/miyabi tui
-```
+That is usually safe. It means `project_memory/tasks.json` already exists.
 
-#### Build errors
-```bash
-# Make sure Rust is up to date
-rustup update
+### I want to use another coding agent
 
-# Clean and rebuild
-cargo clean
-cargo build --release
-```
+That is the intended model. MergeGate is the gate, not the engine.
 
-#### Session not saving
-```bash
-# Check permissions on sessions directory
-ls -la ~/.miyabi/sessions/
-
-# Create if missing
-mkdir -p ~/.miyabi/sessions
-```
-
-### Debug Mode
-
-For verbose logging:
-```bash
-RUST_LOG=debug ./target/release/miyabi tui
-```
-
-### Getting Help
-
-- Check `miyabi --help` for CLI options
-- Press `F1` in TUI for keybindings
-- Open an issue: https://github.com/ShunsukeHayashi/mergegate/issues
-
-## License
-
-MIT
-
----
-
-Built with Rust, Ratatui, and Claude API.
diff --git a/crates/mergegate-cli/Cargo.toml b/crates/mergegate-cli/Cargo.toml
index 8a37459..acd0887 100644
--- a/crates/mergegate-cli/Cargo.toml
+++ b/crates/mergegate-cli/Cargo.toml
@@ -7,7 +7,7 @@ authors.workspace = true
 license.workspace = true
 repository.workspace = true
 homepage.workspace = true
-description = "MergeGate CLI - Main command-line interface for deterministic task execution and agent-assisted development"
+description = "MergeGate CLI - Engine-agnostic gate workflow for deterministic task execution"
 
 [[bin]]
 name = "miyabi"
@@ -20,15 +20,10 @@ path = "src/bin/mergegate.rs"
 [dependencies]
 # Workspace crates
 miyabi-core = { package = "mergegate-core", path = "../mergegate-core" }
-miyabi-tui = { package = "mergegate-tui", path = "../mergegate-tui" }
 
 # CLI
 clap = { workspace = true }
 
-# TUI Framework
-ratatui = { workspace = true }
-crossterm = { workspace = true }
-
 # Async Runtime
 tokio = { workspace = true }
 
diff --git a/crates/mergegate-cli/src/main.rs b/crates/mergegate-cli/src/main.rs
index f177262..0224873 100644
--- a/crates/mergegate-cli/src/main.rs
+++ b/crates/mergegate-cli/src/main.rs
@@ -62,36 +62,14 @@ fn agent_guide() -> String {
 }
 
 #[derive(Parser)]
-#[command(author, version, about = "MergeGate - Deterministic task execution and merge workflow for AI-assisted development", long_about = None)]
+#[command(author, version, about = "MergeGate - Engine-agnostic gate CLI for AI-assisted development", long_about = None)]
 struct Cli {
-    /// Model to use (overrides config)
-    #[arg(short, long)]
-    model: Option<String>,
-
-    /// Maximum tokens for responses (overrides config)
-    #[arg(long)]
-    max_tokens: Option<u32>,
-
-    /// Enable Extended Thinking (Claude 4.5+)
-    #[arg(long)]
-    thinking: bool,
-
-    /// Path to config file
-    #[arg(short, long)]
-    config: Option<PathBuf>,
-
-    /// Session ID to load on startup
-    #[arg(short, long)]
-    session: Option<String>,
-
     #[command(subcommand)]
     command: Option<Commands>,
 }
 
 #[derive(Subcommand)]
 enum Commands {
-    /// Start the TUI interface
-    Tui,
     /// Show status
     Status,
     /// Generate default config file
@@ -116,23 +94,6 @@ enum Commands {
         #[arg(short, long)]
         verbose: bool,
     },
-    /// Run agent with a prompt (autonomous execution)
-    Agent {
-        /// The prompt to execute
-        prompt: String,
-        /// Maximum iterations (default: 10)
-        #[arg(long, default_value = "10")]
-        max_iterations: usize,
-        /// Auto-approve all tool executions
-        #[arg(long)]
-        auto_approve: bool,
-        /// Output format: text or json
-        #[arg(long, default_value = "text")]
-        format: String,
-        /// System prompt for the agent
-        #[arg(long)]
-        system: Option<String>,
-    },
     #[command(
         about = "Deterministic Task Protocol gate controls",
         long_about = "Run the gate init command to set up a new project.\n\nDeterministic Task Protocol gate controls"
@@ -452,78 +413,35 @@ async fn main() -> anyhow::Result<()> {
     let cli = Cli::from_arg_matches(&matches).unwrap_or_else(|error| error.exit());
 
     match cli.command {
-        Some(Commands::Tui) | None => {
-            // Run TUI
-            use crossterm::{
-                event::{DisableMouseCapture, EnableMouseCapture},
-                execute,
-                terminal::{
-                    disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen,
-                },
-            };
-            use miyabi_core::config::Config;
-            use miyabi_tui::App;
-            use ratatui::prelude::*;
-            use std::io;
-
-            // Load config (from custom path or default)
-            let mut config = if let Some(config_path) = &cli.config {
-                Config::load_from(config_path)?
-            } else {
-                Config::load().unwrap_or_default()
-            };
-
-            // Apply CLI overrides
-            if let Some(model) = &cli.model {
-                config.api.model = model.clone();
-            }
-            if let Some(max_tokens) = cli.max_tokens {
-                config.api.max_tokens = max_tokens;
-            }
-            if cli.thinking {
-                config.api.thinking = true;
-            }
-
-            enable_raw_mode()?;
-            let mut stdout = io::stdout();
-            execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
-            let backend = CrosstermBackend::new(stdout);
-            let mut terminal = Terminal::new(backend)?;
-
-            let mut app = App::with_config(config);
-
-            // Load session if specified
-            if let Some(session_id) = &cli.session {
-                if let Err(e) = app.load_session(session_id) {
-                    eprintln!("Warning: Failed to load session {}: {}", session_id, e);
-                }
-            }
-
-            let res = app.run(&mut terminal).await;
-
-            disable_raw_mode()?;
-            execute!(
-                terminal.backend_mut(),
-                LeaveAlternateScreen,
-                DisableMouseCapture
-            )?;
-            terminal.show_cursor()?;
-
-            if let Err(err) = res {
-                eprintln!("Error: {}", err);
-            }
+        None => {
+            let mut command = Cli::command();
+            command = command.name(current_binary_name());
+            command.print_help()?;
+            println!();
+            println!();
+            println!("Start here:");
+            println!("  {}", gate_command("status"));
+            println!("  {}", gate_command("init"));
+            println!("  {}", gate_command("guide"));
         }
         Some(Commands::Status) => {
             use miyabi_core::config::Config;
 
             let config = Config::load().unwrap_or_default();
 
-            println!("Miyabi Status: Ready");
+            println!("MergeGate Status: Ready");
             println!();
+            println!("Binary:   {}", current_binary_name());
             println!("Config:   {}", Config::default_path().display());
-            println!("Sessions: {}", config.sessions_dir().display());
-            println!("Model:    {}", config.api.model);
             println!();
+            println!("Core workflow:");
+            println!("  {}", gate_command("status"));
+            println!("  {}", gate_command("init"));
+            println!("  {}", gate_command("guide"));
+            println!();
+            println!("Direct runtime config remains on disk for compatibility.");
+            println!("Model:    {}", config.api.model);
+            println!("Sessions: {}", config.sessions_dir().display());
 
             // Load and show rules info
             let cwd = std::env::current_dir().unwrap_or_default();
@@ -766,152 +684,6 @@ async fn main() -> anyhow::Result<()> {
                 }
             }
         }
-        Some(Commands::Agent {
-            prompt,
-            max_iterations,
-            auto_approve,
-            format,
-            system,
-        }) => {
-            use miyabi_core::{
-                config::Config, Agent, AgentConfig, AgentEvent, AnthropicClient, ExecutorRegistry,
-            };
-            use tokio::sync::mpsc;
-
-            // Load config
-            let mut config = if let Some(config_path) = &cli.config {
-                Config::load_from(config_path)?
-            } else {
-                Config::load().unwrap_or_default()
-            };
-
-            // Apply CLI overrides
-            if let Some(model) = &cli.model {
-                config.api.model = model.clone();
-            }
-            if let Some(max_tokens) = cli.max_tokens {
-                config.api.max_tokens = max_tokens;
-            }
-            if cli.thinking {
-                config.api.thinking = true;
-            }
-
-            // Get API key
-            let api_key = config
-                .api
-                .api_key
-                .clone()
-                .or_else(|| std::env::var("ANTHROPIC_API_KEY").ok())
-                .ok_or_else(|| {
-                    anyhow::anyhow!("No API key found. Set ANTHROPIC_API_KEY or add to config.")
-                })?;
-
-            // Create client
-            let client = AnthropicClient::new(api_key)?
-                .with_model(&config.api.model)
-                .with_max_tokens(config.api.max_tokens)
-                .with_thinking(config.api.thinking);
-
-            // Create executor registry with standard tools
-            let registry = ExecutorRegistry::with_standard_tools();
-
-            // Configure agent
-            let agent_config = AgentConfig {
-                max_iterations,
-                max_tokens_per_turn: config.api.max_tokens,
-                require_approval: !auto_approve,
-                auto_approve_patterns: if auto_approve {
-                    vec![
-                        "read".to_string(),
-                        "glob".to_string(),
-                        "grep".to_string(),
-                        "write".to_string(),
-                        "edit".to_string(),
-                        "bash".to_string(),
-                    ]
-                } else {
-                    vec!["read".to_string(), "glob".to_string(), "grep".to_string()]
-                },
-                ..Default::default()
-            };
-
-            // Create agent
-            let mut agent = Agent::new(client, registry).with_config(agent_config);
-
-            // Set system prompt
-            if let Some(sys) = system {
-                agent = agent.with_system_prompt(sys);
-            } else if let Some(sys) = config.api.system_prompt {
-                agent = agent.with_system_prompt(sys);
-            }
-
-            // Create event channel for progress
-            let (tx, mut rx) = mpsc::channel(100);
-            let agent = agent.with_event_channel(tx);
-
-            // Spawn agent execution
-            let agent_handle = tokio::spawn(async move { agent.run(&prompt).await });
-
-            // Process events
-            while let Some(event) = rx.recv().await {
-                match &event {
-                    AgentEvent::Started { prompt } => {
-                        if format != "json" {
-                            eprintln!("🚀 Agent started with prompt: {}", truncate_str(prompt, 50));
-                        }
-                    }
-                    AgentEvent::Thinking { iteration } => {
-                        if format != "json" {
-                            eprintln!("💭 Iteration {}", iteration + 1);
-                        }
-                    }
-                    AgentEvent::ToolDetected { name, .. } => {
-                        if format != "json" {
-                            eprintln!("🔧 Tool detected: {}", name);
-                        }
-                    }
-                    AgentEvent::ToolExecuting { name, .. } => {
-                        if format != "json" {
-                            eprintln!("⚡ Executing: {}", name);
-                        }
-                    }
-                    AgentEvent::ToolCompleted { name, .. } => {
-                        if format != "json" {
-                            eprintln!("✅ Completed: {}", name);
-                        }
-                    }
-                    AgentEvent::ToolFailed { name, error } => {
-                        if format != "json" {
-                            eprintln!("❌ Failed {}: {}", name, error);
-                        }
-                    }
-                    AgentEvent::Completed { result } => {
-                        if format == "json" {
-                            println!("{}", serde_json::to_string_pretty(&result)?);
-                        } else {
-                            println!("\n{}", result.output);
-                            eprintln!(
-                                "\n📊 Stats: {} iterations, {} tool calls, {} tokens",
-                                result.iterations, result.tool_calls, result.total_tokens
-                            );
-                        }
-                    }
-                    AgentEvent::Failed { error } => {
-                        eprintln!("❌ Agent failed: {}", error);
-                    }
-                    _ => {}
-                }
-            }
-
-            // Wait for agent to complete
-            match agent_handle.await? {
-                Ok(_) => {}
-                Err(e) => {
-                    eprintln!("Agent error: {}", e);
-                    std::process::exit(1);
-                }
-            }
-        }
         Some(Commands::Gate {
             format,
             emit_event,
diff --git a/docs/USER_MANUAL.md b/docs/USER_MANUAL.md
index 357b428..d3acc06 100644
--- a/docs/USER_MANUAL.md
+++ b/docs/USER_MANUAL.md
@@ -1,578 +1,172 @@
 # MergeGate ユーザーマニュアル
 
 **Version**: 0.1.0
-**Last Updated**: 2025-11-23
-
----
-
-## 目次
-
-1. [はじめに](#はじめに)
-2. [インストール](#インストール)
-3. [初期設定](#初期設定)
-4. [基本的な使い方](#基本的な使い方)
-5. [TUIモード](#tuiモード)
-6. [Agentモード](#agentモード)
-7. [セッション管理](#セッション管理)
-8. [設定ファイル](#設定ファイル)
-9. [プロジェクトルール](#プロジェクトルール)
-10. [トラブルシューティング](#トラブルシューティング)
-
----
+**Last Updated**: 2026-04-10
 
 ## はじめに
 
-MergeGate は、AI-assisted development 向けの deterministic task execution and merge workflow です。CLI では `miyabi` と `mergegate` の両方を使え、対話型の TUI と `gate` ベースの repo workflow を提供します。
+MergeGate は、AI-assisted development 向けの engine-agnostic gate CLI です。
 
-設計思想はシンプルです。
+このツールはエージェント本体ではありません。TUI や direct backend を前提にせず、repo 作業を安全に進めるための protocol を提供します。
+
+役割は次の通りです。
+
+- task を登録する
+- impact を記録する
+- file lock を取る
+- branch / PR / merge 状態を結び付ける
+- completion を記録する
+
+設計思想:
 
 - `GitNexus`: コードベースを理解する
 - `MergeGate`: 変更を安全に実行する
 
-影響範囲が分かるだけでは、AI エージェントは安全に開発できません。どの task を登録し、どのファイルを lock し、どの順序で branch / PR / merge まで進めるかを protocol として固定するのが MergeGate の役割です。
+## 何をするツールか
 
-### 主な機能
+MergeGate の中心機能は `gate` です。
 
-- **TUIモード**: 美しいターミナルUIでの対話
-- **Agentモード**: ファイル操作やコマンド実行を含む自律実行
-- **セッション管理**: 会話履歴の保存・再開
-- **プロジェクトルール**: .miyabirulesによるカスタムルール
+```bash
+mergegate gate ...
+```
 
----
+または互換 alias として:
+
+```bash
+miyabi gate ...
+```
+
+実行エンジンは Claude Code、Codex、Gemini CLI など、どれでも構いません。MergeGate はその前後で repo workflow を制御します。
 
 ## インストール
 
 ### 必要要件
 
 - Rust 1.70以上
-- Anthropic APIキー
 
-### ビルド手順
+### ビルド
 
 ```bash
-# 1. リポジトリをクローン
 git clone https://github.com/ShunsukeHayashi/mergegate.git
 cd mergegate
-
-# 2. リリースビルド
 cargo build --release
-
-# 3. バイナリの確認
-ls -la target/release/miyabi target/release/mergegate
 ```
 
-### パスを通す（オプション）
+## 最初にやること
+
+### 1. repo の状態確認
 
 ```bash
-# ~/.bashrc または ~/.zshrc に追加
-export PATH="$PATH:/path/to/mergegate/target/release"
-
-# 設定を反映
-source ~/.bashrc  # または source ~/.zshrc
+./target/release/mergegate gate status
 ```
 
----
+`tasks: 0` は正常です。ledger はあるが task がまだ無い状態です。
 
-## 初期設定
-
-### 1. 設定ファイルの生成
+### 2. 初期化
 
 ```bash
-./target/release/miyabi init
+./target/release/mergegate gate init
 ```
 
-これにより `~/.miyabi/config.toml` が作成されます。
+これで `project_memory/tasks.json` が作成されます。
 
-### 2. APIキーの設定
-
-**方法1: 環境変数（推奨）**
-```bash
-export ANTHROPIC_API_KEY="sk-ant-api03-..."
-```
-
-永続化する場合は `~/.bashrc` や `~/.zshrc` に追加：
-```bash
-echo 'export ANTHROPIC_API_KEY="sk-ant-api03-..."' >> ~/.zshrc
-```
-
-**方法2: 設定ファイル**
-```bash
-vim ~/.miyabi/config.toml
-```
-
-```toml
-[api]
-api_key = "sk-ant-api03-..."
-```
-
-### 3. 設定の確認
+### 3. ガイド確認
 
 ```bash
-./target/release/miyabi status
+./target/release/mergegate gate guide
 ```
 
-出力例：
-```
-Miyabi Status: Ready
+## 基本フロー
 
-Config:   /Users/you/.miyabi/config.toml
-Sessions: /Users/you/.miyabi/sessions
-Model:    claude-sonnet-4-5-20250929
-
-Rules:    0 rules loaded
+```bash
+./target/release/mergegate gate register --issue 123 --title "Fix login redirect"
+./target/release/mergegate gate impact issue-123 --risk medium --symbols 3
+./target/release/mergegate gate assign issue-123 --agent codex --node macbook --files "src/auth.rs"
+./target/release/mergegate gate branch issue-123 codex/fix-login-redirect
+./target/release/mergegate gate pr issue-123 456
+./target/release/mergegate gate merge issue-123 <sha>
 ```
 
----
+典型的な順番:
 
-## 基本的な使い方
+1. `register`
+2. `impact`
+3. `assign`
+4. 実装
+5. `branch`
+6. `pr`
+7. `merge` または `manual-complete`
 
-### コマンド一覧
+## コマンド一覧
 
 | コマンド | 説明 |
 |---------|------|
-| `miyabi tui` | TUIモードを起動 |
-| `miyabi agent <prompt>` | Agentモードで実行 |
-| `miyabi status` | ステータス表示 |
-| `miyabi version` | バージョン情報 |
-| `miyabi init` | 設定ファイル生成 |
-| `miyabi sessions` | セッション一覧 |
-| `miyabi rules` | プロジェクトルール表示 |
+| `mergegate gate status` | ledger 全体または task 状態を表示 |
+| `mergegate gate init` | ledger を初期化 |
+| `mergegate gate guide` | workflow ガイドを表示 |
+| `mergegate gate register` | task を登録 |
+| `mergegate gate impact` | impact を記録 |
+| `mergegate gate assign` | task を割り当てて lock を取得 |
+| `mergegate gate branch` | branch を記録 |
+| `mergegate gate pr` | PR 番号を記録 |
+| `mergegate gate merge` | merge を記録 |
+| `mergegate gate manual-complete` | 手動完了を記録 |
+| `mergegate gate locks` | active lock を表示 |
+| `mergegate gate dispatchable` | 今着手できる task を表示 |
+| `mergegate gate dag` | 依存順序を表示 |
 
-### グローバルオプション
+## 実行エンジンとの関係
 
-| オプション | 説明 |
-|-----------|------|
-| `-m, --model <MODEL>` | 使用するモデルを指定 |
-| `--max-tokens <N>` | 最大トークン数 |
-| `--thinking` | Extended Thinking有効化 |
-| `-c, --config <PATH>` | 設定ファイルパス |
-| `-s, --session <ID>` | セッションID指定 |
+MergeGate は coding agent を置き換えるものではありません。
 
-### 使用例
+想定している使い方:
 
-```bash
-# バージョン確認
-./target/release/miyabi version
+- Claude Code が実装する
+- Codex が実装する
+- Gemini CLI が実装する
+- MergeGate が task / lock / merge discipline を管理する
 
-# ステータス確認
-./target/release/miyabi status
+つまり:
 
-# モデル指定でTUI起動
-./target/release/miyabi tui --model claude-sonnet-4-5-20250929
+- エージェントは交換可能
+- gate protocol は固定
 
-# Extended Thinking有効でTUI起動
-./target/release/miyabi tui --thinking
-```
+## よくある質問
 
----
+### API キーは必要ですか
 
-## TUIモード
+`gate` workflow だけなら不要です。
 
-### 起動
+### TUI は必要ですか
 
-```bash
-./target/release/miyabi tui
-```
+不要です。MergeGate の本体ではありません。
 
-### キーバインド
+### built-in backend は必要ですか
 
-#### 基本操作
+不要です。MergeGate の本体ではありません。
 
-| キー | 動作 |
-|------|------|
-| `Enter` | メッセージ送信 |
-| `Ctrl+C` | 終了 |
-| `Esc` | オーバーレイを閉じる / キャンセル |
-| `F1` | ヘルプ表示 |
+### `miyabi` と `mergegate` のどちらを使えばいいですか
 
-#### ナビゲーション
-
-| キー | 動作 |
-|------|------|
-| `j` / `↓` | 下にスクロール |
-| `k` / `↑` | 上にスクロール |
-| `Page Down` | ページ下へ |
-| `Page Up` | ページ上へ |
-| `g` | 先頭へ |
-| `G` | 末尾へ |
-
-#### コマンド
-
-| キー | 動作 |
-|------|------|
-| `Ctrl+P` | コマンドパレット |
-| `Ctrl+N` | 新規セッション |
-| `Ctrl+O` | セッションを開く |
-| `Ctrl+S` | セッション保存 |
-
-### Vimモード
-
-設定で有効化できます：
-
-```toml
-[ui]
-vim_mode = true
-```
-
-有効にすると、テキスト入力でVimキーバインドが使用可能になります。
-
----
-
-## Agentモード
-
-Agentモードは、プロンプトに基づいて自律的にタスクを実行します。
-
-### 基本使用
-
-```bash
-./target/release/miyabi agent "タスクの説明"
-```
-
-### オプション
-
-| オプション | 説明 | デフォルト |
-|-----------|------|-----------|
-| `--max-iterations <N>` | 最大イテレーション数 | 10 |
-| `--auto-approve` | ツール実行を自動承認 | false |
-| `--format <FORMAT>` | 出力形式 (text/json) | text |
-| `--system <PROMPT>` | システムプロンプト | なし |
-
-### 使用例
-
-```bash
-# 基本的な実行
-./target/release/miyabi agent "Create a Python script that prints hello world"
-
-# 自動承認モード（注意して使用）
-./target/release/miyabi agent --auto-approve "List all .rs files in src/"
-
-# イテレーション数を増やす
-./target/release/miyabi agent --max-iterations 20 "Refactor the utils module"
-
-# JSON出力
-./target/release/miyabi agent --format json "Show current directory"
-
-# カスタムシステムプロンプト
-./target/release/miyabi agent --system "You are an expert Rust developer" "Review main.rs"
-```
-
-### 利用可能なツール
-
-Agentモードでは以下のツールが使用可能です：
-
-- **Bash**: シェルコマンドの実行
-- **Read**: ファイルの読み取り
-- **Write**: ファイルの書き込み
-- **Edit**: ファイルの編集
-- **Glob**: ファイルパターン検索
-- **Grep**: テキスト検索
-
-### セキュリティ
-
-- デフォルトでは危険な操作は承認を求められます
-- `--auto-approve` は信頼できるタスクのみに使用してください
-- `--max-iterations` で無限ループを防止
-
----
-
-## セッション管理
-
-### セッション一覧の表示
-
-```bash
-./target/release/miyabi sessions
-```
-
-出力例：
-```
-ID                                   Title                Messages Tokens     Updated
-------------------------------------------------------------------------------------------
-133b91bf-99c9-4097-974c-c60c9abd2495 test                 6        246        2025-11-22 14:36
-19af5958-183f-4b39-be2e-b14b0809181c test                 2        21         2025-11-22 14:03
-```
-
-### セッションの操作
-
-```bash
-# セッションを削除
-./target/release/miyabi sessions -d <session-id>
-
-# JSONにエクスポート
-./target/release/miyabi sessions -e <session-id>
-
-# Markdownにエクスポート
-./target/release/miyabi sessions -m <session-id>
-```
-
-### セッションの再開
-
-```bash
-# 特定のセッションからTUIを起動
-./target/release/miyabi tui -s <session-id>
-```
-
-### 保存場所
-
-セッションは `~/.miyabi/sessions/` に保存されます。
-
----
-
-## 設定ファイル
-
-### 設定ファイルの場所
-
-```
-~/.miyabi/config.toml
-```
-
-### 完全な設定例
-
-```toml
-[api]
-# Anthropic APIキー（環境変数ANTHROPIC_API_KEYでも設定可能）
-api_key = "sk-ant-api03-..."
-
-# 使用するモデル
-model = "claude-sonnet-4-5-20250929"
-
-# 最大トークン数
-max_tokens = 8192
-
-# Extended Thinking（Claude 4.5+）
-thinking = false
-
-# システムプロンプト
-system_prompt = "You are a helpful AI assistant."
-
-# リクエストタイムアウト（秒）
-timeout_secs = 120
-
-# 最大リトライ回数
-max_retries = 3
-
-[ui]
-# サイドバー表示
-show_sidebar = false
-
-# ステータスバー表示
-show_status_bar = true
-
-# パンくずリスト表示
-show_breadcrumb = true
-
-# カラーテーマ
-theme = "tokyo-night"
-
-# Vimモード
-vim_mode = false
-
-# コードブロックの行番号
-show_line_numbers = true
-
-[session]
-# セッションの自動保存
-auto_save = true
-
-# 自動保存間隔（秒）
-auto_save_interval = 30
-
-# 最大セッション数
-max_sessions = 100
-
-[tools]
-# Bashツールを有効化
-enable_bash = true
-
-# ファイルツール（read/write/edit）を有効化
-enable_file_tools = true
-
-# 検索ツール（glob/grep）を有効化
-enable_search_tools = true
-
-# 低リスクツールの自動承認
-auto_approve_low_risk = false
-
-# Bashコマンドのタイムアウト（秒）
-bash_timeout = 120
-```
-
-### 環境変数による上書き
-
-| 環境変数 | 説明 |
-|---------|------|
-| `ANTHROPIC_API_KEY` | APIキー |
-| `MIYABI_MODEL` | モデル名 |
-| `MIYABI_MAX_TOKENS` | 最大トークン数 |
-| `MIYABI_THINKING` | Extended Thinking (true/false) |
-
----
-
-## プロジェクトルール
-
-### .miyabirulesファイル
-
-プロジェクトルートに `.miyabirules` ファイルを作成することで、プロジェクト固有のルールを定義できます。
-
-### ファイル形式
-
-```yaml
-version: 1
-
-rules:
-  - name: "no-unwrap"
-    pattern: ".unwrap()"
-    suggestion: "Use ? operator or proper error handling"
-    file_extensions: ["rs"]
-    severity: "warning"
-
-  - name: "no-println-debug"
-    pattern: "println!"
-    suggestion: "Use tracing macros for logging"
-    file_extensions: ["rs"]
-    severity: "info"
-
-agent_preferences:
-  codegen:
-    style: "functional"
-    error_handling: "result"
-    min_score: 80
-  review:
-    min_score: 70
-```
-
-### ルールの確認
-
-```bash
-./target/release/miyabi rules
-```
-
-### 重要度レベル
-
-| レベル | 説明 |
-|--------|------|
-| `error` | 重大な問題（赤） |
-| `warning` | 警告（黄） |
-| `info` | 情報（青） |
-
----
+新規利用では `mergegate` を推奨します。`miyabi` は互換 alias です。
 
 ## トラブルシューティング
 
-### "API key not found" エラー
+### `tasks: 0`
+
+異常ではありません。task が未登録なだけです。
+
+### どの task から始めればよいか分からない
 
 ```bash
-# 環境変数を確認
-echo $ANTHROPIC_API_KEY
-
-# 設定されていない場合
-export ANTHROPIC_API_KEY="sk-ant-..."
+./target/release/mergegate gate dispatchable
+./target/release/mergegate gate dag
+./target/release/mergegate gate guide
 ```
 
-### "Device not configured" エラー
-
-ターミナルがTUIをサポートしていない可能性があります：
+### 既存 repo に導入済みか分からない
 
 ```bash
-# 別のターミナルを試す（iTerm2, Alacritty等）
-
-# または明示的にTERM設定
-TERM=xterm-256color ./target/release/miyabi tui
+./target/release/mergegate gate status
 ```
 
-### ビルドエラー
-
-```bash
-# Rustを最新版に更新
-rustup update
-
-# クリーンビルド
-cargo clean
-cargo build --release
-```
-
-### セッションが保存されない
-
-```bash
-# ディレクトリの確認
-ls -la ~/.miyabi/sessions/
-
-# なければ作成
-mkdir -p ~/.miyabi/sessions
-```
-
-### デバッグモード
-
-詳細なログを表示：
-
-```bash
-RUST_LOG=debug ./target/release/miyabi tui
-```
-
-### ネットワークエラー
-
-```bash
-# タイムアウトを延長
-# ~/.miyabi/config.toml
-[api]
-timeout_secs = 300
-max_retries = 5
-```
-
----
-
-## サポート
-
-### ヘルプの確認
-
-```bash
-# 全体のヘルプ
-./target/release/miyabi --help
-
-# サブコマンドのヘルプ
-./target/release/miyabi agent --help
-./target/release/miyabi sessions --help
-```
-
-### 問題報告
-
-GitHub Issues: https://github.com/ShunsukeHayashi/mergegate/issues
-
-### TUIでのヘルプ
-
-TUI起動中に `F1` キーでヘルプを表示できます。
-
----
-
-## 付録
-
-### 対応モデル
-
-- `claude-sonnet-4-5-20250929` (デフォルト)
-- `claude-haiku-4-5-20251001`
-- `claude-sonnet-4-20250514`
-
-### ファイル構成
-
-```
-~/.miyabi/
-├── config.toml      # 設定ファイル
-└── sessions/        # セッションデータ
-    ├── xxx.json
-    └── yyy.json
-```
-
-### ショートカット早見表
-
-| 操作 | キー |
-|------|------|
-| 送信 | Enter |
-| 終了 | Ctrl+C |
-| ヘルプ | F1 |
-| コマンドパレット | Ctrl+P |
-| 新規セッション | Ctrl+N |
-| セッションを開く | Ctrl+O |
-| 保存 | Ctrl+S |
-
----
-
-**Built with Rust, Ratatui, and Claude API**
+ledger が無ければ `gate init` に進めます。