fix: replay annotated history in Web Console

fix: separate Ticket keys from assignment identity
chore: merge develop into hare/develop
2026-08-29 23:10:32 +09:00 · 2026-08-29 22:52:03 +09:00 · 2026-08-29 13:25:32 +09:00 · 2026-08-29 13:21:40 +09:00 · 2026-08-29 13:21:35 +09:00 · 2026-08-28 02:05:12 +09:00
329 changed files with 29891 additions and 6628 deletions
@@ -26,6 +26,16 @@ dependencies = [
 "pom",
 ]

+[[package]]
+name = "aead"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d122413f284cf2d62fb1b7db97e02edb8cda96d769b16e443a4f6195e35662b0"
+dependencies = [
+ "crypto-common 0.1.7",
+ "generic-array",
+]
+
 [[package]]
 name = "aes"
 version = "0.8.4"
@@ -37,6 +47,56 @@ dependencies = [
 "cpufeatures 0.2.17",
 ]

+[[package]]
+name = "aes-gcm"
+version = "0.10.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "831010a0f742e1209b3bcea8fab6a8e149051ba6099432c8cb2cc117dec3ead1"
+dependencies = [
+ "aead",
+ "aes",
+ "cipher",
+ "ctr",
+ "ghash",
+ "subtle",
+]
+
+[[package]]
+name = "agen"
+version = "0.2.1"
+dependencies = [
+ "agen-macros",
+ "async-trait",
+ "base64 0.22.1",
+ "chrono",
+ "clap",
+ "dotenv",
+ "eventsource-stream",
+ "futures",
+ "reqwest",
+ "schemars",
+ "serde",
+ "serde_json",
+ "tempfile",
+ "thiserror 2.0.18",
+ "tokio",
+ "tokio-util",
+ "tracing",
+ "tracing-subscriber",
+ "trybuild",
+ "wiremock",
+ "zstd",
+]
+
+[[package]]
+name = "agen-macros"
+version = "0.2.0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
 [[package]]
 name = "aho-corasick"
 version = "1.1.4"
@@ -290,6 +350,12 @@ dependencies = [
 "tracing",
 ]

+[[package]]
+name = "base16ct"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4c7f02d4ea65f2c1853089ffd8d2787bdbc63de2f0d29dedbcf8ccdfa0ccd4cf"
+
 [[package]]
 name = "base64"
 version = "0.21.7"
@@ -302,6 +368,12 @@ version = "0.22.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"

+[[package]]
+name = "base64ct"
+version = "1.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2af50177e190e07a26ab74f8b1efbfe2ef87da2116221318cb1c2e82baf7de06"
+
 [[package]]
 name = "base64urlsafedata"
 version = "0.5.5"
@@ -313,6 +385,17 @@ dependencies = [
 "serde",
 ]

+[[package]]
+name = "bcrypt-pbkdf"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6aeac2e1fe888769f34f05ac343bbef98b14d1ffb292ab69d4608b3abc86f2a2"
+dependencies = [
+ "blowfish",
+ "pbkdf2",
+ "sha2 0.10.9",
+]
+
 [[package]]
 name = "bit-set"
 version = "0.5.3"
@@ -367,6 +450,16 @@ dependencies = [
 "generic-array",
 ]

+[[package]]
+name = "blowfish"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e412e2cd0f2b2d93e02543ceae7917b3c70331573df19ee046bcbc35e45e87d7"
+dependencies = [
+ "byteorder",
+ "cipher",
+]
+
 [[package]]
 name = "bstr"
 version = "1.12.1"
@@ -399,6 +492,12 @@ version = "1.25.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c8efb64bd706a16a1bdde310ae86b351e4d21550d98d056f22f8a7f7a2183fec"

+[[package]]
+name = "byteorder"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
+
 [[package]]
 name = "bytes"
 version = "1.11.1"
@@ -459,6 +558,17 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "613afe47fcd5fac7ccf1db93babcb082c5994d996f20b8b159f2ad1658eb5724"

+[[package]]
+name = "chacha20"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3613f74bd2eac03dad61bd53dbe620703d4371614fe0bc3b9f04dd36fe4e818"
+dependencies = [
+ "cfg-if",
+ "cipher",
+ "cpufeatures 0.2.17",
+]
+
 [[package]]
 name = "chrono"
 version = "0.4.44"
@@ -618,6 +728,12 @@ dependencies = [
 "wasm-bindgen",
 ]

+[[package]]
+name = "const-oid"
+version = "0.9.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c2459377285ad874054d797f3ccebf984978aa39129f6eafde5cdc8315b612f8"
+
 [[package]]
 name = "const-oid"
 version = "0.10.2"
@@ -901,6 +1017,18 @@ version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "460fbee9c2c2f33933d720630a6a0bac33ba7053db5344fac858d4b8952d77d5"

+[[package]]
+name = "crypto-bigint"
+version = "0.5.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0dc92fb57ca44df6db8059111ab3af99a63d5d0f8375d9972e319a379c6bab76"
+dependencies = [
+ "generic-array",
+ "rand_core 0.6.4",
+ "subtle",
+ "zeroize",
+]
+
 [[package]]
 name = "crypto-common"
 version = "0.1.7"
@@ -930,6 +1058,41 @@ dependencies = [
 "phf 0.11.3",
 ]

+[[package]]
+name = "ctr"
+version = "0.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0369ee1ad671834580515889b80f2ea915f23b8be8d0daa4bbaf2ac5c7590835"
+dependencies = [
+ "cipher",
+]
+
+[[package]]
+name = "curve25519-dalek"
+version = "4.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "97fb8b7c4503de7d6ae7b42ab72a5a59857b4c937ec27a3d4539dba95b5ab2be"
+dependencies = [
+ "cfg-if",
+ "cpufeatures 0.2.17",
+ "curve25519-dalek-derive",
+ "digest 0.10.7",
+ "fiat-crypto",
+ "rustc_version",
+ "subtle",
+]
+
+[[package]]
+name = "curve25519-dalek-derive"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f46882e17999c6cc590af592290432be3bce0428cb0d5f8b6715e4dc7b383eb3"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
 [[package]]
 name = "darling"
 version = "0.23.0"
@@ -1020,6 +1183,16 @@ version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5729f5117e208430e437df2f4843f5e5952997175992d1414f94c57d61e270b4"

+[[package]]
+name = "der"
+version = "0.7.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e7c1832837b905bbfb5101e07cc24c8deddf52f93225eee6ead5f4d63d53ddcb"
+dependencies = [
+ "const-oid 0.9.6",
+ "zeroize",
+]
+
 [[package]]
 name = "der-parser"
 version = "9.0.0"
@@ -1078,7 +1251,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292"
 dependencies = [
 "block-buffer 0.10.4",
+ "const-oid 0.9.6",
 "crypto-common 0.1.7",
+ "subtle",
 ]

 [[package]]
@@ -1088,7 +1263,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4850db49bf08e663084f7fb5c87d202ef91a3907271aff24a94eb97ff039153c"
 dependencies = [
 "block-buffer 0.12.0",
- "const-oid",
+ "const-oid 0.10.2",
 "crypto-common 0.2.1",
 ]

@@ -1139,12 +1314,66 @@ dependencies = [
 "cipher",
 ]

+[[package]]
+name = "ecdsa"
+version = "0.16.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee27f32b5c5292967d2d4a9d7f1e0b0aed2c15daded5a60300e4abb9d8020bca"
+dependencies = [
+ "der",
+ "digest 0.10.7",
+ "elliptic-curve",
+ "rfc6979",
+ "signature",
+ "spki",
+]
+
+[[package]]
+name = "ed25519"
+version = "2.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "115531babc129696a58c64a4fef0a8bf9e9698629fb97e9e40767d235cfbcd53"
+dependencies = [
+ "signature",
+]
+
+[[package]]
+name = "ed25519-dalek"
+version = "2.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "70e796c081cee67dc755e1a36a0a172b897fab85fc3f6bc48307991f64e4eca9"
+dependencies = [
+ "curve25519-dalek",
+ "ed25519",
+ "sha2 0.10.9",
+ "subtle",
+]
+
 [[package]]
 name = "either"
 version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "48c757948c5ede0e46177b7add2e67155f70e33c07fea8284df6576da70b3719"

+[[package]]
+name = "elliptic-curve"
+version = "0.13.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b5e6043086bf7973472e0c7dff2142ea0b680d30e18d9cc40f267efbf222bd47"
+dependencies = [
+ "base16ct",
+ "crypto-bigint",
+ "digest 0.10.7",
+ "ff",
+ "generic-array",
+ "group",
+ "pkcs8",
+ "rand_core 0.6.4",
+ "sec1",
+ "subtle",
+ "zeroize",
+]
+
 [[package]]
 name = "embedded-io"
 version = "0.4.0"
@@ -1248,6 +1477,22 @@ version = "2.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "37909eebbb50d72f9059c3b6d82c0463f2ff062c9e95845c43a6c9c0355411be"

+[[package]]
+name = "ff"
+version = "0.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c0b50bfb653653f9ca9095b427bed08ab8d75a137839d9ad64eb11810d5b6393"
+dependencies = [
+ "rand_core 0.6.4",
+ "subtle",
+]
+
+[[package]]
+name = "fiat-crypto"
+version = "0.2.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "28dea519a9695b9977216879a3ebfddf92f1c08c05d984f8996aecd6ecdc811d"
+
 [[package]]
 name = "filedescriptor"
 version = "0.8.3"
@@ -1490,6 +1735,7 @@ checksum = "85649ca51fd72272d7821adaf274ad91c288277713d9c18820d8499a7ff69e9a"
 dependencies = [
 "typenum",
 "version_check",
+ "zeroize",
 ]

 [[package]]
@@ -1532,6 +1778,16 @@ dependencies = [
 "wasip3",
 ]

+[[package]]
+name = "ghash"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f0d8a4362ccb29cb0b265253fb0a2728f592895ee6854fd9bc13f2ffda266ff1"
+dependencies = [
+ "opaque-debug",
+ "polyval",
+]
+
 [[package]]
 name = "gimli"
 version = "0.33.0"
@@ -1600,6 +1856,17 @@ dependencies = [
 "memmap2",
 ]

+[[package]]
+name = "group"
+version = "0.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f0f9ef7462f7c099f518d754361858f86d8a07af53ba9af0fe635bbccb151a63"
+dependencies = [
+ "ff",
+ "rand_core 0.6.4",
+ "subtle",
+]
+
 [[package]]
 name = "h2"
 version = "0.4.13"
@@ -1688,6 +1955,15 @@ version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"

+[[package]]
+name = "hmac"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c49c37c09c17a53d937dfbb742eb3a961d65a994e6bcdcf37e7399d0cc8ab5e"
+dependencies = [
+ "digest 0.10.7",
+]
+
 [[package]]
 name = "html5ever"
 version = "0.26.0"
@@ -2176,6 +2452,9 @@ name = "lazy_static"
 version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bbd2bcb4c963f2ddae06a2efc7e9f3591312473c50c6685e1f298068316e66fe"
+dependencies = [
+ "spin",
+]

 [[package]]
 name = "leb128fmt"
@@ -2261,42 +2540,6 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "11d3d7f243d5c5a8b9bb5d6dd2b1602c0cb0b9db1621bafc7ed66e35ff9fe092"

-[[package]]
-name = "llm-engine"
-version = "0.2.1"
-dependencies = [
- "async-trait",
- "base64 0.22.1",
- "chrono",
- "clap",
- "dotenv",
- "eventsource-stream",
- "futures",
- "llm-engine-macros",
- "reqwest",
- "schemars",
- "serde",
- "serde_json",
- "tempfile",
- "thiserror 2.0.18",
- "tokio",
- "tokio-util",
- "tracing",
- "tracing-subscriber",
- "trybuild",
- "wiremock",
- "zstd",
-]
-
-[[package]]
-name = "llm-engine-macros"
-version = "0.2.0"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn 2.0.117",
-]
-
 [[package]]
 name = "lock_api"
 version = "0.4.14"
@@ -2384,8 +2627,8 @@ dependencies = [
 name = "manifest"
 version = "0.1.0"
 dependencies = [
+ "agen",
 "arc-swap",
- "llm-engine",
 "protocol",
 "secrets",
 "serde",
@@ -2512,11 +2755,11 @@ dependencies = [
 name = "memory"
 version = "0.1.0"
 dependencies = [
+ "agen",
 "async-trait",
 "chrono",
 "libc",
 "lint-common",
- "llm-engine",
 "manifest",
 "schemars",
 "serde",
@@ -2672,6 +2915,22 @@ dependencies = [
 "num-traits",
 ]

+[[package]]
+name = "num-bigint-dig"
+version = "0.8.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e661dda6640fad38e827a6d4a310ff4763082116fe217f279885c97f511bb0b7"
+dependencies = [
+ "lazy_static",
+ "libm",
+ "num-integer",
+ "num-iter",
+ "num-traits",
+ "rand 0.8.5",
+ "smallvec",
+ "zeroize",
+]
+
 [[package]]
 name = "num-conv"
 version = "0.2.1"
@@ -2698,6 +2957,16 @@ dependencies = [
 "num-traits",
 ]

+[[package]]
+name = "num-iter"
+version = "0.1.46"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c92800bd69a1eac91786bcfe9da64a897eb72911b8dc3095decbd07429e8048b"
+dependencies = [
+ "num-integer",
+ "num-traits",
+]
+
 [[package]]
 name = "num-traits"
 version = "0.2.19"
@@ -2705,6 +2974,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
 dependencies = [
 "autocfg",
+ "libm",
 ]

 [[package]]
@@ -2765,6 +3035,12 @@ version = "1.70.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "384b8ab6d37215f3c5301a95a4accb5d64aa607f1fcb26a11b5303878451b4fe"

+[[package]]
+name = "opaque-debug"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c08d65885ee38876c4f86fa503fb49d7b507c2b62552df7c70b2fce627e06381"
+
 [[package]]
 name = "openssl"
 version = "0.10.76"
@@ -2818,6 +3094,44 @@ dependencies = [
 "num-traits",
 ]

+[[package]]
+name = "p256"
+version = "0.13.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c9863ad85fa8f4460f9c48cb909d38a0d689dba1f6f6988a5e3e0d31071bcd4b"
+dependencies = [
+ "ecdsa",
+ "elliptic-curve",
+ "primeorder",
+ "sha2 0.10.9",
+]
+
+[[package]]
+name = "p384"
+version = "0.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fe42f1670a52a47d448f14b6a5c61dd78fce51856e68edaa38f7ae3a46b8d6b6"
+dependencies = [
+ "ecdsa",
+ "elliptic-curve",
+ "primeorder",
+ "sha2 0.10.9",
+]
+
+[[package]]
+name = "p521"
+version = "0.13.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fc9e2161f1f215afdfce23677034ae137bbd45016a880c2eb3ba8eb95f085b2"
+dependencies = [
+ "base16ct",
+ "ecdsa",
+ "elliptic-curve",
+ "primeorder",
+ "rand_core 0.6.4",
+ "sha2 0.10.9",
+]
+
 [[package]]
 name = "parking_lot"
 version = "0.12.5"
@@ -2847,6 +3161,15 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "35fb2e5f958ec131621fdd531e9fc186ed768cbe395337403ae56c17a74c68ec"

+[[package]]
+name = "pbkdf2"
+version = "0.12.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8ed6a7761f76e3b9f92dfb0a60a6a6477c61024b775147ff0973a02653abaf2"
+dependencies = [
+ "digest 0.10.7",
+]
+
 [[package]]
 name = "pdf-extract"
 version = "0.10.0"
@@ -2864,6 +3187,15 @@ dependencies = [
 "unicode-normalization",
 ]

+[[package]]
+name = "pem-rfc7468"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "88b39c9bfcfc231068454382784bb460aae594343fb030d46e9f50a645418412"
+dependencies = [
+ "base64ct",
+]
+
 [[package]]
 name = "percent-encoding"
 version = "2.3.2"
@@ -3009,6 +3341,27 @@ version = "0.2.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a89322df9ebe1c1578d689c92318e070967d1042b512afbe49518723f4e6d5cd"

+[[package]]
+name = "pkcs1"
+version = "0.7.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c8ffb9f10fa047879315e6625af03c164b16962a5368d724ed16323b68ace47f"
+dependencies = [
+ "der",
+ "pkcs8",
+ "spki",
+]
+
+[[package]]
+name = "pkcs8"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f950b2377845cebe5cf8b5165cb3cc1a5e0fa5cfa3e1f7f55707d8fd82e0a7b7"
+dependencies = [
+ "der",
+ "spki",
+]
+
 [[package]]
 name = "pkg-config"
 version = "0.3.32"
@@ -3021,6 +3374,29 @@ version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b4596b6d070b27117e987119b4dac604f3c58cfb0b191112e24771b2faeac1a6"

+[[package]]
+name = "poly1305"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8159bd90725d2df49889a078b54f4f79e87f1f8a8444194cdca81d38f5393abf"
+dependencies = [
+ "cpufeatures 0.2.17",
+ "opaque-debug",
+ "universal-hash",
+]
+
+[[package]]
+name = "polyval"
+version = "0.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9d1fe60d06143b2430aa532c94cfe9e29783047f06c0d7fd359a9a51b729fa25"
+dependencies = [
+ "cfg-if",
+ "cpufeatures 0.2.17",
+ "opaque-debug",
+ "universal-hash",
+]
+
 [[package]]
 name = "pom"
 version = "1.1.0"
@@ -3101,6 +3477,15 @@ dependencies = [
 "syn 2.0.117",
 ]

+[[package]]
+name = "primeorder"
+version = "0.13.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "353e1ca18966c16d9deb1c69278edbc5f194139612772bd9537af60ac231e1e6"
+dependencies = [
+ "elliptic-curve",
+]
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.106"
@@ -3525,6 +3910,16 @@ dependencies = [
 "web-sys",
 ]

+[[package]]
+name = "rfc6979"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8dd2a808d456c4a54e300a23e9f5a67e122c3024119acbfd73e3bf664491cb2"
+dependencies = [
+ "hmac",
+ "subtle",
+]
+
 [[package]]
 name = "ring"
 version = "0.17.14"
@@ -3539,6 +3934,27 @@ dependencies = [
 "windows-sys 0.52.0",
 ]

+[[package]]
+name = "rsa"
+version = "0.9.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8573f03f5883dcaebdfcf4725caa1ecb9c15b2ef50c43a07b816e06799bb12d"
+dependencies = [
+ "const-oid 0.9.6",
+ "digest 0.10.7",
+ "num-bigint-dig",
+ "num-integer",
+ "num-traits",
+ "pkcs1",
+ "pkcs8",
+ "rand_core 0.6.4",
+ "sha2 0.10.9",
+ "signature",
+ "spki",
+ "subtle",
+ "zeroize",
+]
+
 [[package]]
 name = "rusqlite"
 version = "0.37.0"
@@ -3745,6 +4161,20 @@ version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"

+[[package]]
+name = "sec1"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3e97a565f76233a6003f9f5c54be1d9c5bdfa3eccfb189469f11ec4901c47dc"
+dependencies = [
+ "base16ct",
+ "der",
+ "generic-array",
+ "pkcs8",
+ "subtle",
+ "zeroize",
+]
+
 [[package]]
 name = "secrets"
 version = "0.1.0"
@@ -3967,10 +4397,10 @@ dependencies = [
 name = "session-store"
 version = "0.1.0"
 dependencies = [
+ "agen",
 "async-trait",
 "base64 0.22.1",
 "futures",
- "llm-engine",
 "protocol",
 "serde",
 "serde_json",
@@ -4060,6 +4490,16 @@ dependencies = [
 "libc",
 ]

+[[package]]
+name = "signature"
+version = "2.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77549399552de45a898a580c1b41d445bf730df867cc44e6c0233bbc4b8329de"
+dependencies = [
+ "digest 0.10.7",
+ "rand_core 0.6.4",
+]
+
 [[package]]
 name = "simd-adler32"
 version = "0.3.9"
@@ -4103,6 +4543,72 @@ dependencies = [
 "windows-sys 0.61.2",
 ]

+[[package]]
+name = "spin"
+version = "0.9.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3763264f6b73151db08c50ff20d7d8a0b8796e021cdea7ceedad07b80155fa0e"
+
+[[package]]
+name = "spki"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d91ed6c858b01f942cd56b37a94b3e0a1798290327d1236e4d9cf4eaca44d29d"
+dependencies = [
+ "base64ct",
+ "der",
+]
+
+[[package]]
+name = "ssh-cipher"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "caac132742f0d33c3af65bfcde7f6aa8f62f0e991d80db99149eb9d44708784f"
+dependencies = [
+ "aes",
+ "aes-gcm",
+ "cbc",
+ "chacha20",
+ "cipher",
+ "ctr",
+ "poly1305",
+ "ssh-encoding",
+ "subtle",
+]
+
+[[package]]
+name = "ssh-encoding"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eb9242b9ef4108a78e8cd1a2c98e193ef372437f8c22be363075233321dd4a15"
+dependencies = [
+ "base64ct",
+ "pem-rfc7468",
+ "sha2 0.10.9",
+]
+
+[[package]]
+name = "ssh-key"
+version = "0.6.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3b86f5297f0f04d08cabaa0f6bff7cb6aec4d9c3b49d87990d63da9d9156a8c3"
+dependencies = [
+ "bcrypt-pbkdf",
+ "ed25519-dalek",
+ "p256",
+ "p384",
+ "p521",
+ "rand_core 0.6.4",
+ "rsa",
+ "sec1",
+ "sha2 0.10.9",
+ "signature",
+ "ssh-cipher",
+ "ssh-encoding",
+ "subtle",
+ "zeroize",
+]
+
 [[package]]
 name = "stable_deref_trait"
 version = "1.2.1"
@@ -4408,10 +4914,10 @@ dependencies = [
 name = "ticket"
 version = "0.1.0"
 dependencies = [
+ "agen",
 "async-trait",
 "chrono",
 "fs4",
- "llm-engine",
 "project-record",
 "rusqlite",
 "schemars",
@@ -4612,11 +5118,11 @@ checksum = "756daf9b1013ebe47a8776667b466417e2d4c5679d441c26230efd9ef78692db"
 name = "tools"
 version = "0.1.0"
 dependencies = [
+ "agen",
 "async-trait",
 "filetime",
 "fs-operation",
 "html5ever",
- "llm-engine",
 "manifest",
 "markup5ever_rcdom",
 "pdf-extract",
@@ -4794,11 +5300,11 @@ checksum = "d2df906b07856748fa3f6e0ad0cbaa047052d4a7dd609e231c4f72cee8c36f31"
 name = "tui"
 version = "0.1.0"
 dependencies = [
+ "agen",
 "base64 0.22.1",
 "client",
 "crossterm 0.28.1",
 "fs4",
- "llm-engine",
 "manifest",
 "protocol",
 "pulldown-cmark",
@@ -4934,6 +5440,16 @@ version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ebc1c04c71510c7f702b52b7c350734c9ff1295c464a03335b00bb84fc54f853"

+[[package]]
+name = "universal-hash"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fc1de2c688dc15305988b563c3854064043356019f97a4b46276fe734c4f07ea"
+dependencies = [
+ "crypto-common 0.1.7",
+ "subtle",
+]
+
 [[package]]
 name = "unsafe-libyaml"
 version = "0.2.11"
@@ -6060,6 +6576,7 @@ dependencies = [
 name = "worker"
 version = "0.1.0"
 dependencies = [
+ "agen",
 "arc-swap",
 "async-trait",
 "chrono",
@@ -6074,7 +6591,6 @@ dependencies = [
 "futures-util",
 "include_dir",
 "libc",
- "llm-engine",
 "manifest",
 "mcp",
 "memory",
@@ -6108,13 +6624,13 @@ dependencies = [
 name = "worker-runtime"
 version = "0.1.0"
 dependencies = [
+ "agen",
 "async-trait",
 "axum",
 "base64 0.22.1",
 "decodal",
 "flow",
 "futures",
- "llm-engine",
 "manifest",
 "protocol",
 "reqwest",
@@ -6131,9 +6647,12 @@ dependencies = [
 "tokio-tungstenite 0.29.0",
 "toml",
 "tower",
+ "url",
 "uuid",
 "workdir",
 "worker",
+ "workspace-api",
+ "zeroize",
 ]

 [[package]]
@@ -6257,11 +6776,13 @@ dependencies = [
 "project-record",
 "protocol",
 "reqwest",
+ "ring",
 "rusqlite",
 "serde",
 "serde_json",
 "serde_yaml",
 "sha2 0.11.0",
+ "ssh-key",
 "tempfile",
 "thiserror 2.0.18",
 "ticket",
@@ -6278,6 +6799,7 @@ dependencies = [
 "worker",
 "worker-runtime",
 "workspace-api",
+ "zeroize",
 ]

 [[package]]
@@ -2,8 +2,8 @@
 resolver = "2"
 members = [
    "crates/client",
-    "crates/llm-engine",
-    "crates/llm-engine-macros",
+    "crates/agen",
+    "crates/agen-macros",
    "crates/session-store",
    "crates/secrets",
    "crates/manifest",
@@ -33,8 +33,8 @@ members = [
 ]
 default-members = [
    "crates/client",
-    "crates/llm-engine",
-    "crates/llm-engine-macros",
+    "crates/agen",
+    "crates/agen-macros",
    "crates/session-store",
    "crates/secrets",
    "crates/manifest",
@@ -69,8 +69,8 @@ license = "MIT"
 [workspace.dependencies]
 # Internal crates
 client = { path = "crates/client" }
-llm-engine = { path = "crates/llm-engine", version = "0.2" }
-llm-engine-macros = { path = "crates/llm-engine-macros", version = "0.2" }
+agen = { path = "crates/agen", version = "0.2" }
+agen-macros = { path = "crates/agen-macros", version = "0.2" }
 manifest = { path = "crates/manifest" }
 mcp = { path = "crates/mcp" }
 lint-common = { path = "crates/lint-common" }
@@ -115,6 +115,7 @@ tar = "0.4"
 rusqlite = { version = "0.37", features = ["backup", "bundled"] }
 ring = "0.17.14"
 sha2 = "0.11"
+ssh-key = { version = "0.6.7", features = ["ed25519", "encryption"] }
 tempfile = "3.27"
 thiserror = "2.0"
 tokio = "1.52"
@@ -124,4 +125,5 @@ toml = "1.1"
 tracing = "0.1"
 url = "2.5"
 uuid = "1.23"
+zeroize = "1"
 webauthn-rs = { version = "0.5.2", features = ["danger-allow-state-serialisation", "danger-credential-internals"] }
@@ -21,7 +21,7 @@ services:
      - "8787"
    volumes:
      - server-data:/server-data
-      - ./docker/workspace:/workspace:ro
+      - /etc/yoi/server.toml:/server-config/server.toml:ro

  webui:
    image: yoi-webui:latest
@@ -0,0 +1,25 @@
+[package]
+name = "agen-macros"
+description = "Procedural macros for declaring agen tools"
+version = "0.2.0"
+edition.workspace = true
+rust-version = "1.85"
+license.workspace = true
+readme = "README.md"
+repository = "https://gitea.hareworks.net/Hare/yoi"
+homepage = "https://gitea.hareworks.net/Hare/yoi"
+documentation = "https://docs.rs/agen-macros"
+keywords = ["llm", "agent", "tools", "macros"]
+categories = ["development-tools::procedural-macro-helpers"]
+include = ["src/**", "README.md", "LICENSE"]
+
+[lib]
+proc-macro = true
+
+[dependencies]
+proc-macro2 = "1"
+quote = "1"
+syn = { version = "2", features = ["full"] }
+
+[package.metadata.docs.rs]
+all-features = true
@@ -0,0 +1,7 @@
+Copyright 2026 Hare
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
@@ -0,0 +1,32 @@
+# agen-macros
+
+Procedural macros used by [`agen`](https://crates.io/crates/agen) to declare LLM tools from Rust methods.
+
+Applications should normally depend only on `agen` and import its re-exports:
+
+```rust
+use agen::tool_registry;
+
+#[derive(Clone)]
+struct Tools;
+
+#[tool_registry]
+impl Tools {
+    /// Returns the supplied text.
+    #[tool]
+    async fn echo(
+        &self,
+        #[description = "Text to return"] text: String,
+    ) -> Result<String, std::io::Error> {
+        Ok(text)
+    }
+}
+```
+
+`#[tool_registry]` generates the argument schema, a `Tool` implementation, and an `<method>_definition` constructor. It rejects arguments of its own, duplicate `#[tool]` markers, malformed or duplicate `#[description = "..."]` attributes, and non-identifier argument patterns.
+
+Generated code targets the canonical `::agen` path and uses implementation dependencies re-exported by `agen`; consumers do not need direct `serde`, `schemars`, `serde_json`, or `async-trait` dependencies. Renaming the `agen` dependency in `Cargo.toml` is not currently supported.
+
+This companion package is published before the matching `agen` release. Its public contract is the generated API consumed by `agen`, and its minor version compatibility follows the `agen` 0.2 series.
+
+Licensed under the [MIT License](https://gitea.hareworks.net/Hare/yoi/src/branch/develop/LICENSE).
@@ -0,0 +1,482 @@
+//! Procedural macros for declaring [`agen`](https://docs.rs/agen) tools.
+//!
+//! [`tool_registry`] expands methods marked with `#[tool]` into `agen::tool::Tool`
+//! implementations and tool definitions. Applications normally use the re-exports from
+//! `agen`; this companion crate exists so those macros can be published and versioned
+//! independently.
+
+use proc_macro::TokenStream;
+use quote::{format_ident, quote};
+use syn::{
+    Attribute, FnArg, ImplItem, ItemImpl, Lit, Meta, Pat, ReturnType, Type, parse_macro_input,
+    spanned::Spanned,
+};
+
+/// Generates tools for methods marked with `#[tool]` in an `impl` block.
+///
+/// Method doc comments become the tool description. An argument can use
+/// `#[description = "..."]` to supply its JSON Schema description.
+///
+/// ```ignore
+/// #[derive(Clone)]
+/// struct MyApp;
+///
+/// #[agen::tool_registry]
+/// impl MyApp {
+///     /// Retrieves a user by ID.
+///     #[tool]
+///     async fn get_user(
+///         &self,
+///         #[description = "The user ID"] user_id: String,
+///     ) -> Result<String, std::io::Error> {
+///         todo!()
+///     }
+/// }
+/// ```
+///
+/// This generates a `ToolGetUser` wrapper, a `GetUserArgs` schema type, and
+/// `MyApp::get_user_definition()`.
+#[proc_macro_attribute]
+pub fn tool_registry(attr: TokenStream, item: TokenStream) -> TokenStream {
+    let attr = proc_macro2::TokenStream::from(attr);
+    let impl_block = parse_macro_input!(item as ItemImpl);
+
+    expand_tool_registry(attr, impl_block)
+        .unwrap_or_else(syn::Error::into_compile_error)
+        .into()
+}
+
+fn expand_tool_registry(
+    attr: proc_macro2::TokenStream,
+    mut impl_block: ItemImpl,
+) -> syn::Result<proc_macro2::TokenStream> {
+    if !attr.is_empty() {
+        return Err(syn::Error::new(
+            attr.span(),
+            "tool_registry does not accept arguments",
+        ));
+    }
+
+    let self_ty = impl_block.self_ty.as_ref().clone();
+    let mut generated_items = Vec::new();
+
+    for item in &mut impl_block.items {
+        let ImplItem::Fn(method) = item else {
+            continue;
+        };
+
+        let tool_attrs: Vec<_> = method
+            .attrs
+            .iter()
+            .filter(|attr| attr.path().is_ident("tool"))
+            .collect();
+        if tool_attrs.len() > 1 {
+            return Err(syn::Error::new_spanned(
+                tool_attrs[1],
+                "duplicate #[tool] attribute",
+            ));
+        }
+        let Some(tool_attr) = tool_attrs.first() else {
+            continue;
+        };
+        if !matches!(tool_attr.meta, Meta::Path(_)) {
+            return Err(syn::Error::new_spanned(
+                tool_attr,
+                "#[tool] does not accept arguments",
+            ));
+        }
+
+        method.attrs.retain(|attr| !attr.path().is_ident("tool"));
+        generated_items.push(generate_tool_impl(&self_ty, method)?);
+
+        for input in &mut method.sig.inputs {
+            if let FnArg::Typed(pat_type) = input {
+                pat_type
+                    .attrs
+                    .retain(|attr| !attr.path().is_ident("description"));
+            }
+        }
+    }
+
+    Ok(quote! {
+        #impl_block
+
+        #(#generated_items)*
+    })
+}
+
+fn extract_doc_comment(attrs: &[Attribute]) -> String {
+    let mut lines = Vec::new();
+
+    for attr in attrs {
+        if attr.path().is_ident("doc")
+            && let Meta::NameValue(meta) = &attr.meta
+            && let syn::Expr::Lit(expr_lit) = &meta.value
+            && let Lit::Str(lit_str) = &expr_lit.lit
+        {
+            let line = lit_str.value();
+            let trimmed = line.strip_prefix(' ').unwrap_or(&line);
+            lines.push(trimmed.to_string());
+        }
+    }
+
+    lines.join("\n")
+}
+
+fn extract_description_attr(attrs: &[Attribute]) -> syn::Result<Option<String>> {
+    let mut description = None;
+
+    for attr in attrs
+        .iter()
+        .filter(|attr| attr.path().is_ident("description"))
+    {
+        let value = match &attr.meta {
+            Meta::NameValue(meta) => match &meta.value {
+                syn::Expr::Lit(expr_lit) => match &expr_lit.lit {
+                    Lit::Str(value) => value.value(),
+                    _ => {
+                        return Err(syn::Error::new_spanned(
+                            attr,
+                            "description must be a string literal",
+                        ));
+                    }
+                },
+                _ => {
+                    return Err(syn::Error::new_spanned(
+                        attr,
+                        "description must be a string literal",
+                    ));
+                }
+            },
+            _ => {
+                return Err(syn::Error::new_spanned(
+                    attr,
+                    "expected #[description = \"...\"]",
+                ));
+            }
+        };
+
+        if description.replace(value).is_some() {
+            return Err(syn::Error::new_spanned(
+                attr,
+                "duplicate #[description] attribute",
+            ));
+        }
+    }
+
+    Ok(description)
+}
+
+fn argument_ident(pat: &Pat) -> syn::Result<&syn::Ident> {
+    match pat {
+        Pat::Ident(pat_ident) => Ok(&pat_ident.ident),
+        _ => Err(syn::Error::new_spanned(
+            pat,
+            "tool arguments must use simple identifier patterns",
+        )),
+    }
+}
+
+fn is_tool_execution_context_type(ty: &Type) -> bool {
+    let Type::Path(path) = ty else {
+        return false;
+    };
+    path.path
+        .segments
+        .last()
+        .is_some_and(|segment| segment.ident == "ToolExecutionContext")
+}
+
+fn generate_tool_impl(
+    self_ty: &Type,
+    method: &syn::ImplItemFn,
+) -> syn::Result<proc_macro2::TokenStream> {
+    let sig = &method.sig;
+    let method_name = &sig.ident;
+    let tool_name = method_name.to_string();
+
+    let pascal_name = to_pascal_case(&method_name.to_string());
+    let tool_struct_name = format_ident!("Tool{}", pascal_name);
+    let args_struct_name = format_ident!("{}Args", pascal_name);
+    let definition_name = format_ident!("{}_definition", method_name);
+
+    let description = extract_doc_comment(&method.attrs);
+    let description = if description.is_empty() {
+        format!("Tool: {}", tool_name)
+    } else {
+        description
+    };
+
+    let method_args: Vec<_> = sig
+        .inputs
+        .iter()
+        .filter_map(|arg| match arg {
+            FnArg::Typed(pat_type) => Some(pat_type),
+            FnArg::Receiver(_) => None,
+        })
+        .collect();
+    let json_args: Vec<_> = method_args
+        .iter()
+        .copied()
+        .filter(|pat_type| !is_tool_execution_context_type(pat_type.ty.as_ref()))
+        .collect();
+
+    let arg_fields: Vec<_> = json_args
+        .iter()
+        .map(|pat_type| {
+            let field_name = argument_ident(pat_type.pat.as_ref())?;
+            let ty = &pat_type.ty;
+            let description = extract_description_attr(&pat_type.attrs)?;
+
+            Ok(if let Some(description) = description {
+                quote! {
+                    #[schemars(description = #description)]
+                    pub #field_name: #ty
+                }
+            } else {
+                quote! {
+                    pub #field_name: #ty
+                }
+            })
+        })
+        .collect::<syn::Result<_>>()?;
+
+    let call_args: Vec<_> = method_args
+        .iter()
+        .map(|pat_type| {
+            if is_tool_execution_context_type(pat_type.ty.as_ref()) {
+                Ok(quote! { ctx.clone() })
+            } else {
+                let ident = argument_ident(pat_type.pat.as_ref())?;
+                Ok(quote! { args.#ident })
+            }
+        })
+        .collect::<syn::Result<_>>()?;
+    let method_call = if call_args.is_empty() {
+        quote! { self.ctx.#method_name() }
+    } else {
+        quote! { self.ctx.#method_name(#(#call_args),*) }
+    };
+
+    let awaiter = if sig.asyncness.is_some() {
+        quote! { .await }
+    } else {
+        quote! {}
+    };
+
+    let result_handling = if is_result_type(&sig.output) {
+        quote! {
+            match result {
+                Ok(val) => Ok(format!("{:?}", val).into()),
+                Err(error) => Err(::agen::tool::ToolError::ExecutionFailed(format!("{}", error))),
+            }
+        }
+    } else {
+        quote! {
+            Ok(format!("{:?}", result).into())
+        }
+    };
+
+    let args_struct_def = quote! {
+        #[derive(
+            ::agen::__private::serde::Deserialize,
+            ::agen::__private::schemars::JsonSchema,
+        )]
+        #[serde(crate = "::agen::__private::serde")]
+        #[schemars(crate = "::agen::__private::schemars")]
+        struct #args_struct_name {
+            #(#arg_fields),*
+        }
+    };
+
+    let execute_body = if json_args.is_empty() {
+        quote! {
+            let _: #args_struct_name = ::agen::__private::serde_json::from_str(input_json)
+                .unwrap_or(#args_struct_name {});
+
+            let result = #method_call #awaiter;
+            #result_handling
+        }
+    } else {
+        quote! {
+            let args: #args_struct_name = ::agen::__private::serde_json::from_str(input_json)
+                .map_err(|error| ::agen::tool::ToolError::InvalidArgument(error.to_string()))?;
+
+            let result = #method_call #awaiter;
+            #result_handling
+        }
+    };
+
+    Ok(quote! {
+        #args_struct_def
+
+        #[derive(Clone)]
+        pub struct #tool_struct_name {
+            ctx: #self_ty,
+        }
+
+        #[::agen::__private::async_trait::async_trait]
+        impl ::agen::tool::Tool for #tool_struct_name {
+            async fn execute(
+                &self,
+                input_json: &str,
+                ctx: ::agen::tool::ToolExecutionContext,
+            ) -> Result<::agen::tool::ToolOutput, ::agen::tool::ToolError> {
+                let _ = &ctx;
+                #execute_body
+            }
+        }
+
+        impl #self_ty {
+            /// Returns a tool definition for registration with an `agen::Engine`.
+            pub fn #definition_name(&self) -> ::agen::tool::ToolDefinition {
+                let ctx = self.clone();
+                ::std::sync::Arc::new(move || {
+                    let schema = ::agen::__private::schemars::schema_for!(#args_struct_name);
+                    let meta = ::agen::tool::ToolMeta::new(#tool_name)
+                        .description(#description)
+                        .input_schema(
+                            ::agen::__private::serde_json::to_value(schema)
+                                .unwrap_or_else(|_| ::agen::__private::serde_json::json!({})),
+                        );
+                    let tool: ::std::sync::Arc<dyn ::agen::tool::Tool> =
+                        ::std::sync::Arc::new(#tool_struct_name { ctx: ctx.clone() });
+                    (meta, tool)
+                })
+            }
+        }
+    })
+}
+
+fn is_result_type(return_type: &ReturnType) -> bool {
+    match return_type {
+        ReturnType::Default => false,
+        ReturnType::Type(_, ty) => {
+            if let Type::Path(type_path) = ty.as_ref()
+                && let Some(segment) = type_path.path.segments.last()
+            {
+                return segment.ident == "Result";
+            }
+            false
+        }
+    }
+}
+
+fn to_pascal_case(s: &str) -> String {
+    s.split('_')
+        .map(|part| {
+            let mut chars = part.chars();
+            match chars.next() {
+                None => String::new(),
+                Some(first) => first.to_uppercase().chain(chars).collect(),
+            }
+        })
+        .collect()
+}
+
+/// Marker attribute interpreted by [`tool_registry`].
+#[proc_macro_attribute]
+pub fn tool(attr: TokenStream, item: TokenStream) -> TokenStream {
+    marker_attribute("tool", attr, item)
+}
+
+/// Argument description marker interpreted by [`tool_registry`].
+///
+/// Use it as `#[description = "The argument description"]` on a tool method argument.
+#[proc_macro_attribute]
+pub fn description(attr: TokenStream, item: TokenStream) -> TokenStream {
+    marker_attribute("description", attr, item)
+}
+
+fn marker_attribute(name: &str, attr: TokenStream, item: TokenStream) -> TokenStream {
+    if attr.is_empty() {
+        item
+    } else {
+        syn::Error::new(
+            proc_macro2::Span::call_site(),
+            format!("{name} is a marker interpreted by #[tool_registry]"),
+        )
+        .into_compile_error()
+        .into()
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use quote::quote;
+    use syn::parse_quote;
+
+    #[test]
+    fn rejects_tool_registry_arguments() {
+        let implementation: ItemImpl = parse_quote!(impl Registry {});
+        let error = expand_tool_registry(quote!(unexpected), implementation).unwrap_err();
+
+        assert!(error.to_string().contains("does not accept arguments"));
+    }
+
+    #[test]
+    fn rejects_duplicate_tool_markers() {
+        let implementation: ItemImpl = parse_quote! {
+            impl Registry {
+                #[tool]
+                #[tool]
+                fn inspect(&self) {}
+            }
+        };
+        let error = expand_tool_registry(quote!(), implementation).unwrap_err();
+
+        assert!(error.to_string().contains("duplicate #[tool]"));
+    }
+
+    #[test]
+    fn rejects_invalid_description_attributes() {
+        let implementation: ItemImpl = parse_quote! {
+            impl Registry {
+                #[tool]
+                fn inspect(&self, #[description] input: String) {}
+            }
+        };
+        let error = expand_tool_registry(quote!(), implementation).unwrap_err();
+
+        assert!(error.to_string().contains("expected #[description"));
+    }
+
+    #[test]
+    fn rejects_duplicate_description_attributes() {
+        let implementation: ItemImpl = parse_quote! {
+            impl Registry {
+                #[tool]
+                fn inspect(
+                    &self,
+                    #[description = "first"]
+                    #[description = "second"]
+                    input: String,
+                ) {}
+            }
+        };
+        let error = expand_tool_registry(quote!(), implementation).unwrap_err();
+
+        assert!(error.to_string().contains("duplicate #[description]"));
+    }
+
+    #[test]
+    fn generated_code_uses_only_agen_runtime_paths() {
+        let implementation: ItemImpl = parse_quote! {
+            impl Registry {
+                #[tool]
+                fn inspect(&self, input: String) -> Result<String, Error> {
+                    unreachable!()
+                }
+            }
+        };
+        let expanded = expand_tool_registry(quote!(), implementation)
+            .unwrap()
+            .to_string();
+
+        assert!(expanded.contains(":: agen :: tool :: Tool"));
+        assert!(expanded.contains(":: agen :: __private :: serde_json"));
+        assert!(expanded.contains(":: agen :: __private :: serde"));
+        assert!(expanded.contains(":: agen :: __private :: schemars"));
+    }
+}
@@ -1,9 +1,18 @@
 [package]
-name = "llm-engine"
-description = "A library for building autonomous LLM-powered systems"
+name = "agen"
+description = "Provider-neutral orchestration for tool-using LLM applications"
 version = "0.2.1"
 edition.workspace = true
+rust-version = "1.86"
 license.workspace = true
+readme = "README.md"
+repository = "https://gitea.hareworks.net/Hare/yoi"
+homepage = "https://gitea.hareworks.net/Hare/yoi"
+documentation = "https://docs.rs/agen"
+keywords = ["llm", "agent", "tools", "streaming", "orchestration"]
+categories = ["api-bindings", "asynchronous"]
+include = ["src/**", "tests/**", "examples/*.rs", "docs/**", "README.md", "LICENSE"]
+autoexamples = false

 [features]
 default = []
@@ -12,6 +21,7 @@ codex = ["dep:chrono"]
 [dependencies]
 serde = { workspace = true, features = ["derive"] }
 serde_json = { workspace = true }
+schemars = { workspace = true }
 thiserror = { workspace = true }
 tracing = { workspace = true }
 async-trait = { workspace = true }
@@ -23,13 +33,23 @@ eventsource-stream = "0.2"
 zstd = "0.13"
 base64 = "0.22.1"
 chrono = { version = "0.4", default-features = false, features = ["serde", "clock"], optional = true }
-llm-engine-macros = { workspace = true }
+agen-macros = { workspace = true }

 [dev-dependencies]
 clap = { version = "4.5", features = ["derive", "env"] }
-schemars = { workspace = true }
 tempfile = { workspace = true }
 dotenv = "0.15"
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }
 trybuild = "1.0.116"
 wiremock = "0.6.5"
+
+[[example]]
+name = "engine_cancel_demo"
+path = "examples/engine_cancel_demo.rs"
+
+[[example]]
+name = "engine_cli"
+path = "examples/engine_cli.rs"
+
+[package.metadata.docs.rs]
+all-features = true
@@ -0,0 +1,7 @@
+Copyright 2026 Hare
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
@@ -0,0 +1,91 @@
+# agen
+
+`agen` is a provider-neutral Rust engine for streaming LLM applications that use tools. It owns the turn loop, typed conversation history, provider wire-format adapters, tool execution, interceptors, usage accounting, and cache-aware state transitions.
+
+> `agen` is pre-1.0. Public APIs may change between minor releases.
+
+## Installation
+
+```toml
+[dependencies]
+agen = "0.2.1"
+```
+
+The default feature set is intentionally empty. Enable the experimental Codex/ChatGPT authentication adapter when needed:
+
+```toml
+agen = { version = "0.2.1", features = ["codex"] }
+```
+
+`agen` requires Rust 1.86 or newer. The companion `agen-macros` package requires Rust 1.85 or newer.
+
+## Quick start
+
+Supply an implementation of [`LlmClient`](https://docs.rs/agen/latest/agen/llm_client/trait.LlmClient.html), keep conversation history in your application, then run a turn. The first call consumes the mutable engine and returns a cache-locked engine for later turns.
+
+```no_run
+use agen::{Engine, EngineError, History};
+use agen::llm_client::LlmClient;
+
+async fn conversation<C: LlmClient>(client: C) -> Result<(), EngineError> {
+    let mut history = History::new();
+    let output = Engine::new(client)
+        .system_prompt("You are a concise assistant.")
+        .run(&mut history, "Explain typed state in one sentence.")
+        .await;
+
+    let mut engine = output.engine;
+    let _result = engine.run(&mut history, "Give a Rust example.").await;
+    Ok(())
+}
+```
+
+## Declaring tools
+
+The tool macros are re-exported by `agen`; applications do not need direct dependencies on `serde`, `schemars`, `serde_json`, or `async-trait` for generated code.
+
+```rust
+use agen::tool_registry;
+
+#[derive(Clone)]
+struct Tools;
+
+#[tool_registry]
+impl Tools {
+    /// Returns the supplied text.
+    #[tool]
+    async fn echo(
+        &self,
+        #[description = "Text to return"] text: String,
+    ) -> Result<String, std::io::Error> {
+        Ok(text)
+    }
+}
+
+let definition = Tools.echo_definition();
+assert_eq!(definition().0.name, "echo");
+```
+
+The generated API uses the canonical crate name `agen`. Renaming the `agen` dependency in `Cargo.toml` is not currently supported by these macros.
+
+## Features
+
+| Feature | Default | Adds |
+|---|---:|---|
+| `codex` | No | Experimental Codex/ChatGPT auth-file loading and token refresh support |
+
+The base crate includes provider-neutral transport and Anthropic, OpenAI-compatible, Gemini, and Ollama wire-format schemes. See [`llm_client`](https://docs.rs/agen/latest/agen/llm_client/) for the client boundary.
+
+## Architecture and API scope
+
+The current public modules cover the engine, typed history, client transport/schemes, timeline events, tools, interceptors, pruning, token estimation, and usage records. Their relationships are described in [Architecture](https://gitea.hareworks.net/Hare/yoi/src/branch/develop/crates/agen/docs/architecture.md); behavioral requirements are summarized in [Requirements](https://gitea.hareworks.net/Hare/yoi/src/branch/develop/crates/agen/docs/requirements.md).
+
+Low-level modules remain public in the 0.2 series because downstream Yoi components implement custom clients, event handlers, pruning policies, and tool registries against them. This surface is versioned as pre-1.0 API rather than declared stable.
+
+## Packaging and security
+
+The published package contains source, public documentation, curated examples, and deterministic tests/fixtures. Credentialed fixture-recording utilities are intentionally excluded. Examples that contact a provider read credentials from environment variables and never embed production credentials.
+
+## License
+
+Licensed under the [MIT License](https://gitea.hareworks.net/Hare/yoi/src/branch/develop/LICENSE).
@@ -0,0 +1,62 @@
+# agen architecture
+
+`agen` separates orchestration, event projection, and provider transport so applications can replace an LLM client without changing the turn loop or tool model.
+
+```text
+┌────────────────────────────────────────────┐
+│ Engine                                     │
+│ turn loop · interceptors · tool execution  │
+│ typed state: Mutable → Locked → Mutable    │
+└─────────────────────┬──────────────────────┘
+                      │
+┌─────────────────────▼──────────────────────┐
+│ Timeline                                   │
+│ event dispatch · block collectors          │
+└─────────────────────┬──────────────────────┘
+                      │
+┌─────────────────────▼──────────────────────┐
+│ LlmClient                                  │
+│ transport · provider wire-format schemes   │
+└────────────────────────────────────────────┘
+```
+
+## Main modules
+
+| Module | Responsibility |
+|---|---|
+| `engine` | Turn execution, pause/resume, retries, tool integration, and callbacks |
+| `state` | Sealed `Mutable` and `Locked` type-state markers |
+| `interceptor` | Application-owned control decisions at orchestration boundaries |
+| `tool` / `tool_server` | Tool metadata, registration, execution, and bounded output |
+| `timeline` | Streaming event dispatch, handlers, and block assembly |
+| `llm_client` | Provider-neutral request, response, auth, transport, and scheme contracts |
+| `providers` | Optional higher-level provider adapters such as the `codex` feature |
+| `prune` / `token_counter` | Cache-aware history reduction and token estimation |
+| `usage_record` | Request and token usage accounting |
+
+## Request flow
+
+```text
+Engine history
+  → provider-neutral Request
+    → Scheme::build_request
+      → Provider transport
+```
+
+## Response flow
+
+```text
+streaming response bytes
+  → Scheme event parsing
+    → unified Event values
+      → Timeline handlers and collectors
+        → Engine history/tool decisions
+```
+
+## Type state and cache protection
+
+`Engine<C, Mutable>` permits configuration and history editing. `Engine::run` or `Engine::lock` commits the current prefix and produces `Engine<C, Locked>`. The locked engine may append turns without mutating the committed prefix. `Engine::unlock` explicitly returns to mutable state when an application accepts losing that cache guarantee.
+
+## Public surface
+
+The 0.2 series exposes the low-level client, timeline, tool, pruning, and usage modules because custom clients and orchestration hosts build directly on them. These APIs are intentionally provider-neutral but remain pre-1.0 and may change in later minor releases.
@@ -0,0 +1,39 @@
+# agen requirements
+
+## R1: Turn execution and continuation
+
+- `Engine::run` starts a turn and loops through provider output and tool calls.
+- An `Interceptor` may continue, cancel, or pause work at defined orchestration boundaries.
+- `Engine::resume` continues paused generation without fabricating another user message.
+- Cancellation and provider errors are represented as typed `EngineError` values.
+
+## R2: Explicit cache-preserving state
+
+- `Engine<C, Mutable>` permits configuration and history edits.
+- `Engine::run` or `Engine::lock` transitions to `Engine<C, Locked>` and records the committed prefix.
+- A locked engine appends turns but cannot mutate that prefix through mutable-only APIs.
+- `Engine::unlock` explicitly abandons the lock before configuration or history changes.
+
+## R3: Tool declarations and execution
+
+- `#[tool_registry]` generates a schema and `Tool` implementation for methods marked `#[tool]`.
+- `#[description = "..."]` supplies argument descriptions in generated JSON Schema.
+- Generated code resolves its runtime and helper dependencies through `::agen`.
+- Invalid and duplicate marker attributes produce compile errors rather than panics.
+- Tools execute through `ToolServer` with typed context, errors, and output limits.
+
+## R4: Provider-neutral orchestration
+
+- `LlmClient` is the boundary between the engine and provider-specific transport.
+- Request/response schemes translate provider wire formats into shared request and event types.
+- Interceptors, tool execution, timeline collection, and pruning stay above the provider transport.
+- Provider-specific capabilities are optional features when they require additional policy or dependencies.
+
+## R5: Publication quality
+
+- crates.io metadata includes license, repository, documentation, README, categories, keywords, and MSRV.
+- The default feature set and each optional feature compile and test independently.
+- Macro expansion compiles in a downstream-style integration test without direct helper dependencies.
+- rustdoc builds without dependency documentation.
+- Package contents are explicitly bounded and exclude credentialed fixture-recording utilities.
+- `cargo package` and `cargo publish --dry-run` are run for `agen-macros` before `agen` because the main package depends on its companion package.
@@ -2,9 +2,9 @@
 //!
 //! Example of cancelling from another thread during streaming

-use llm_engine::llm_client::scheme::{Scheme, anthropic::AnthropicScheme};
-use llm_engine::llm_client::transport::{HttpTransport, ResolvedAuth};
-use llm_engine::{Engine, EngineResult};
+use agen::llm_client::scheme::{Scheme, anthropic::AnthropicScheme};
+use agen::llm_client::transport::{HttpTransport, ResolvedAuth};
+use agen::{Engine, EngineRunExit, StopReason};
 use std::time::Duration;

 #[tokio::main]
@@ -29,6 +29,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let base_url = scheme.default_base_url().to_string();
    let client = HttpTransport::new(scheme, model, base_url, ResolvedAuth::ApiKey(api_key), cap);
    let engine = Engine::new(client);
+    let mut history = agen::History::new();

    println!("🚀 Starting Engine...");
    println!("💡 Will cancel after 2 seconds\n");
@@ -45,16 +46,15 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {

    println!("📡 Sending request to LLM...");

-    match engine.run("Tell me a very long story about a brave knight. Make it as detailed as possible with many paragraphs.").await {
-        Ok(out) => match out.result {
-            EngineResult::Finished => println!("✅ Task completed normally"),
-            EngineResult::Paused => println!("⏸️  Task paused"),
-            EngineResult::LimitReached => println!("🔒 Turn limit reached"),
-            EngineResult::Yielded => println!("↩️  Task yielded"),
-        },
-        Err(e) => {
-            println!("❌ Task error: {}", e);
+    let output = engine.run(&mut history, "Tell me a very long story about a brave knight. Make it as detailed as possible with many paragraphs.").await;
+    match output.result {
+        EngineRunExit::Finished => println!("✅ Task completed normally"),
+        EngineRunExit::Paused => println!("⏸️  Task paused"),
+        EngineRunExit::Yielded => println!("↩️  Task yielded"),
+        EngineRunExit::Interrupted(StopReason::LimitReached) => {
+            println!("🔒 Turn limit reached")
        }
+        EngineRunExit::Interrupted(reason) => println!("❌ Task interrupted: {reason:?}"),
    }

    println!("\n✨ Demo complete!");
@@ -38,9 +38,8 @@ use async_trait::async_trait;
 use tracing::info;
 use tracing_subscriber::EnvFilter;

-use clap::{Parser, ValueEnum};
-use llm_engine::{
-    Engine,
+use agen::{
+    Engine, EngineRunExit, StopReason,
    interceptor::{Interceptor, PostToolAction, ToolResultInfo},
    llm_client::{
        LlmClient,
@@ -51,12 +50,9 @@ use llm_engine::{
        transport::{HttpTransport, ResolvedAuth},
    },
    timeline::{Handler, TextBlockEvent, TextBlockKind, ToolUseBlockEvent, ToolUseBlockKind},
+    tool_registry,
 };
-use llm_engine_macros::tool_registry;
-
-// Required imports for macro expansion
-use schemars;
-use serde;
+use clap::{Parser, ValueEnum};

 // =============================================================================
 // Provider Definition
@@ -455,6 +451,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {

    // Create Engine
    let mut engine = Engine::new(client);
+    let mut history = agen::History::new();

    let tool_call_names = Arc::new(Mutex::new(HashMap::new()));

@@ -480,12 +477,9 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {

    // One-shot mode
    if let Some(prompt) = args.prompt {
-        match engine.run(&prompt).await {
-            Ok(_) => {}
-            Err(e) => {
-                eprintln!("\n❌ Error: {}", e);
-                std::process::exit(1);
-            }
+        let output = engine.run(&mut history, &prompt).await;
+        if let EngineRunExit::Interrupted(StopReason::Unexpected(error)) = output.result {
+            eprintln!("\n❌ Error: {error}");
        }

        return Ok(());
@@ -504,13 +498,8 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
        return Ok(());
    }

-    let mut locked = match engine.run(first_input).await {
-        Ok(out) => out.engine,
-        Err(e) => {
-            eprintln!("\n❌ Error: {}", e);
-            return Ok(());
-        }
-    };
+    let output = engine.run(&mut history, first_input).await;
+    let mut locked = output.engine;

    loop {
        print!("\n👤 You: ");
@@ -529,11 +518,10 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
            break;
        }

-        match locked.run(input).await {
-            Ok(_) => {}
-            Err(e) => {
-                eprintln!("\n❌ Error: {}", e);
-            }
+        if let EngineRunExit::Interrupted(StopReason::Unexpected(error)) =
+            locked.run(&mut history, input).await
+        {
+            eprintln!("\n❌ Error: {error}");
        }
    }

@@ -19,11 +19,11 @@
 mod recorder;
 mod scenarios;

-use clap::{Parser, ValueEnum};
-use llm_engine::llm_client::scheme::{
+use agen::llm_client::scheme::{
    Scheme, anthropic::AnthropicScheme, gemini::GeminiScheme, openai_chat::OpenAIScheme,
 };
-use llm_engine::llm_client::transport::{HttpTransport, ResolvedAuth};
+use agen::llm_client::transport::{HttpTransport, ResolvedAuth};
+use clap::{Parser, ValueEnum};

 fn make_transport<S: Scheme>(scheme: S, model: &str, auth: ResolvedAuth) -> HttpTransport<S> {
    let cap = scheme.default_capability();
@@ -7,8 +7,8 @@ use std::io::{BufWriter, Write};
 use std::path::Path;
 use std::time::{Instant, SystemTime, UNIX_EPOCH};

+use agen::llm_client::{LlmClient, Request};
 use futures::StreamExt;
-use llm_engine::llm_client::{LlmClient, Request};

 /// Recorded event
 #[derive(Debug, serde::Serialize, serde::Deserialize)]
@@ -2,7 +2,7 @@
 //!
 //! Defines requests and output file names for each scenario

-use llm_engine::llm_client::{Request, ToolDefinition};
+use agen::llm_client::{Request, ToolDefinition};

 /// Test scenario
 pub struct TestScenario {
@@ -32,7 +32,7 @@ pub trait Kind {
 /// # Examples
 ///
 /// ```ignore
-/// use llm_engine::timeline::{Handler, TextBlockEvent, TextBlockKind};
+/// use agen::timeline::{Handler, TextBlockEvent, TextBlockKind};
 ///
 /// struct TextCollector {
 ///     texts: Vec<String>,
@@ -0,0 +1,199 @@
+//! Typed conversation history containers.
+//!
+//! Agen keeps provider-visible [`Item`](crate::Item) values separate from any
+//! host-domain provenance. The host chooses the annotation type `A`, while Agen
+//! preserves each item and annotation as one entry for clone/truncate/restore
+//! style history operations.
+
+use serde::{Deserialize, Serialize};
+
+use crate::Item;
+
+/// One conversation-history entry with host-owned annotation.
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
+pub struct HistoryEntry<A = ()> {
+    /// Provider/model-visible conversation item.
+    pub item: Item,
+    /// Host-domain metadata kept with the item and never projected to providers.
+    pub annotation: A,
+}
+
+impl<A> HistoryEntry<A> {
+    /// Build an entry from an item and its annotation.
+    pub fn new(item: Item, annotation: A) -> Self {
+        Self { item, annotation }
+    }
+
+    /// Split the entry into its item and annotation.
+    pub fn into_parts(self) -> (Item, A) {
+        (self.item, self.annotation)
+    }
+}
+
+impl HistoryEntry<()> {
+    /// Build a unit-annotated entry.
+    pub fn from_item(item: Item) -> Self {
+        Self {
+            item,
+            annotation: (),
+        }
+    }
+}
+
+/// Conversation history with one annotation per item.
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Default)]
+pub struct History<A = ()> {
+    entries: Vec<HistoryEntry<A>>,
+}
+
+impl<A> History<A> {
+    /// Create an empty history.
+    pub fn new() -> Self {
+        Self {
+            entries: Vec::new(),
+        }
+    }
+
+    /// Build history from already annotated entries, preserving order.
+    pub fn from_entries(entries: Vec<HistoryEntry<A>>) -> Self {
+        Self { entries }
+    }
+
+    /// Replace all entries as one restore/rebuild operation and return the old entries.
+    pub fn replace_entries(&mut self, entries: Vec<HistoryEntry<A>>) -> Vec<HistoryEntry<A>> {
+        std::mem::replace(&mut self.entries, entries)
+    }
+
+    /// Borrow annotated entries.
+    pub fn entries(&self) -> &[HistoryEntry<A>] {
+        &self.entries
+    }
+
+    /// Mutably borrow annotated entries for host-owned rebuild operations.
+    pub fn entries_mut(&mut self) -> &mut [HistoryEntry<A>] {
+        &mut self.entries
+    }
+
+    /// Consume the history into annotated entries.
+    pub fn into_entries(self) -> Vec<HistoryEntry<A>> {
+        self.entries
+    }
+
+    /// Number of entries.
+    pub fn len(&self) -> usize {
+        self.entries.len()
+    }
+
+    /// Whether the history is empty.
+    pub fn is_empty(&self) -> bool {
+        self.entries.is_empty()
+    }
+
+    /// Iterate over annotated entries.
+    pub fn iter(&self) -> impl ExactSizeIterator<Item = &HistoryEntry<A>> {
+        self.entries.iter()
+    }
+
+    /// Iterate over provider-visible items only.
+    pub fn items(&self) -> impl ExactSizeIterator<Item = &Item> {
+        self.entries.iter().map(|entry| &entry.item)
+    }
+
+    /// Clone provider-visible items into a request-local projection.
+    pub fn items_cloned(&self) -> Vec<Item> {
+        self.items().cloned().collect()
+    }
+
+    /// Append an already annotated entry.
+    pub fn push_entry(&mut self, entry: HistoryEntry<A>) {
+        self.entries.push(entry);
+    }
+
+    /// Append many already annotated entries.
+    pub fn extend_entries(&mut self, entries: impl IntoIterator<Item = HistoryEntry<A>>) {
+        self.entries.extend(entries);
+    }
+
+    /// Commit one item through a trusted annotation callback before it becomes live.
+    ///
+    /// The callback may durably persist the item and returns the annotation that
+    /// must be stored with it. If the callback fails, the history is left unchanged.
+    pub fn append_with(
+        &mut self,
+        item: Item,
+        annotate: &mut impl FnMut(&Item) -> Result<A, String>,
+    ) -> Result<(), String> {
+        let annotation = annotate(&item)?;
+        self.entries.push(HistoryEntry { item, annotation });
+        Ok(())
+    }
+
+    /// Commit items through a trusted annotation callback before they become live.
+    ///
+    /// Items before a failure remain appended; the failing item and later items do
+    /// not enter history. This mirrors append-only durable logs where each accepted
+    /// item is already committed before the next item is attempted.
+    pub fn extend_with(
+        &mut self,
+        items: impl IntoIterator<Item = Item>,
+        annotate: &mut impl FnMut(&Item) -> Result<A, String>,
+    ) -> Result<(), String> {
+        for item in items {
+            self.append_with(item, annotate)?;
+        }
+        Ok(())
+    }
+
+    /// Truncate entries, preserving item+annotation pairing for retained entries.
+    pub fn truncate(&mut self, len: usize) {
+        self.entries.truncate(len);
+    }
+
+    /// Clear all entries.
+    pub fn clear(&mut self) {
+        self.entries.clear();
+    }
+}
+
+impl History<()> {
+    /// Build unit-annotated history from provider-visible items.
+    pub fn from_items(items: Vec<Item>) -> Self {
+        Self {
+            entries: items.into_iter().map(HistoryEntry::from_item).collect(),
+        }
+    }
+
+    /// Replace history from provider-visible items using unit annotations.
+    pub fn replace_items(&mut self, items: Vec<Item>) -> Vec<HistoryEntry<()>> {
+        self.replace_entries(items.into_iter().map(HistoryEntry::from_item).collect())
+    }
+
+    /// Append one item with unit annotation.
+    pub fn push(&mut self, item: Item) {
+        self.entries.push(HistoryEntry::from_item(item));
+    }
+
+    /// Append items with unit annotations.
+    pub fn extend_items(&mut self, items: impl IntoIterator<Item = Item>) {
+        self.entries
+            .extend(items.into_iter().map(HistoryEntry::from_item));
+    }
+}
+
+impl<A> IntoIterator for History<A> {
+    type Item = HistoryEntry<A>;
+    type IntoIter = std::vec::IntoIter<HistoryEntry<A>>;
+
+    fn into_iter(self) -> Self::IntoIter {
+        self.entries.into_iter()
+    }
+}
+
+impl<'a, A> IntoIterator for &'a History<A> {
+    type Item = &'a HistoryEntry<A>;
+    type IntoIter = std::slice::Iter<'a, HistoryEntry<A>>;
+
+    fn into_iter(self) -> Self::IntoIter {
+        self.entries.iter()
+    }
+}
@@ -0,0 +1,48 @@
+#![doc = include_str!("../README.md")]
+
+mod engine;
+mod handler;
+mod history;
+mod message;
+
+pub(crate) mod callback;
+pub mod event;
+pub mod interceptor;
+pub mod llm_client;
+pub mod providers;
+pub mod prune;
+pub mod state;
+pub mod timeline;
+pub mod token_counter;
+pub mod tool;
+pub mod tool_server;
+pub mod usage_record;
+
+pub use agen_macros::{description, tool, tool_registry};
+pub use callback::{TextBlockScope, ThinkingBlockScope, ToolUseBlockScope};
+pub use engine::{
+    Engine, EngineConfig, EngineError, EngineResult, EngineRunExit, EngineRunOutput,
+    LlmRetryNotice, StopReason, ToolRegistryError,
+};
+pub use handler::ToolUseBlockStart;
+pub use history::{History, HistoryEntry};
+pub use interceptor::Interceptor;
+pub use message::{ContentPart, Item, Message, Role};
+pub use tool::{
+    ToolCall, ToolExecutionContext, ToolExecutionHandle, ToolExecutionPolicy,
+    ToolExecutionTerminal, ToolExecutionTerminalFuture, ToolOutputLimits, ToolResult,
+    ToolResultDisposition,
+};
+pub use usage_record::UsageRecord;
+
+/// Implementation dependencies used by code generated from `agen` macros.
+///
+/// This module is not a stable user-facing API. It is public only because macro expansion
+/// happens in the downstream crate.
+#[doc(hidden)]
+pub mod __private {
+    pub use async_trait;
+    pub use schemars;
+    pub use serde;
+    pub use serde_json;
+}
@@ -30,7 +30,7 @@ pub enum AuthRequirement {
 /// リクエスト毎に認証ヘッダを動的に組み立てるプロバイダ。
 ///
 /// access token が refresh で更新されたり、複数ヘッダを同時に注入する
-/// 必要があるケースで使う。実体は呼び出し側に置き、llm-engine は
+/// 必要があるケースで使う。実体は呼び出し側に置き、agen は
 /// trait を知るだけ。
 ///
 /// 返したヘッダはそのまま `HeaderMap` に挿入される。`Authorization`
@@ -18,6 +18,9 @@ pub enum ClientError {
        message: String,
        retry_after: Option<Duration>,
    },
+    /// The provider rejected the request because it exceeded the model context window.
+    /// Classified only from a structured provider error code, never message text.
+    ContextWindowExceeded,
    /// A request lifecycle phase exceeded its hard timeout.
    Timeout {
        phase: &'static str,
@@ -48,6 +51,7 @@ impl fmt::Display for ClientError {
                }
                write!(f, ": {}", message)
            }
+            ClientError::ContextWindowExceeded => write!(f, "Model context window reached"),
            ClientError::Timeout { phase, timeout } => {
                write!(f, "{phase} timed out after {}s", timeout.as_secs())
            }
@@ -112,7 +116,10 @@ pub fn is_retryable(error: &ClientError) -> bool {
        ClientError::Api { status: None, .. } => false,
        ClientError::Timeout { .. } => true,
        ClientError::Http(e) => e.is_connect() || e.is_timeout(),
-        ClientError::Json(_) | ClientError::Sse(_) | ClientError::Config(_) => false,
+        ClientError::ContextWindowExceeded
+        | ClientError::Json(_)
+        | ClientError::Sse(_)
+        | ClientError::Config(_) => false,
    }
 }

@@ -8,7 +8,7 @@ use std::time::Duration;

 /// 指数バックオフ + ジッター + 累積タイムアウトを表すポリシー。
 ///
-/// `Default` は llm-engine 全体の固定値を返す。呼び出し側からの上書きが
+/// `Default` は agen 全体の固定値を返す。呼び出し側からの上書きが
 /// 必要になったら拡張する。
 #[derive(Debug, Clone)]
 pub struct RetryPolicy {
@@ -4,8 +4,8 @@
 //! function_call item が first-class で、SSE イベントも `response.*` 名前空間で
 //! 流れる。
 //!
-//! - リクエスト JSON 生成: [`request`]
-//! - SSE イベントパース → [`Event`](crate::llm_client::event::Event) 変換: [`events`]
+//! - リクエスト JSON 生成: `request`
+//! - SSE イベントパース → [`Event`](crate::llm_client::event::Event) 変換: `events`

 mod capability;
 mod events;
@@ -431,13 +431,7 @@ fn api_error_code(error: &ClientError) -> Option<&str> {
 }

 fn is_context_length_exceeded(error: &ClientError) -> bool {
-    match error {
-        ClientError::Api { code, message, .. } => {
-            code.as_deref() == Some("context_length_exceeded")
-                || message.contains("context_length_exceeded")
-        }
-        _ => false,
-    }
+    matches!(error, ClientError::ContextWindowExceeded)
 }

 async fn response_with_timeout(
@@ -487,6 +481,9 @@ async fn classify_error_response(resp: reqwest::Response) -> ClientError {
            .and_then(|v| v.as_str())
            .unwrap_or(&text)
            .to_string();
+        if code.as_deref() == Some("context_length_exceeded") {
+            return ClientError::ContextWindowExceeded;
+        }
        ClientError::Api {
            status: Some(status),
            code,
@@ -9,7 +9,7 @@

 use std::{fmt, sync::Arc};

-use crate::tool::Attachment;
+use crate::tool::{Attachment, ToolResultDisposition};
 use base64::Engine as _;
 use serde::{Deserialize, Serialize};

@@ -69,7 +69,7 @@ impl fmt::Debug for RequestTrace {
 /// # Examples
 ///
 /// ```ignore
-/// use llm_engine::Item;
+/// use agen::Item;
 ///
 /// let user = Item::user_message("Hello!");
 /// let assistant = Item::assistant_message("Hi there!");
@@ -121,6 +121,9 @@ pub enum Item {
        /// Detailed output (removed by pruning when old enough)
        #[serde(default, skip_serializing_if = "Option::is_none")]
        content: Option<String>,
+        /// Typed terminal state used for replay and recovery.
+        #[serde(default, skip_serializing_if = "ToolResultDisposition::is_success")]
+        disposition: ToolResultDisposition,
        /// Whether the tool result represents an execution error.
        #[serde(default, skip_serializing_if = "is_false")]
        is_error: bool,
@@ -261,7 +264,17 @@ impl Item {
        content: Option<String>,
        is_error: bool,
    ) -> Self {
-        Self::tool_result_item_with_attachments(call_id, summary, content, is_error, Vec::new())
+        Self::tool_result_item_with_disposition_and_attachments(
+            call_id,
+            summary,
+            content,
+            if is_error {
+                ToolResultDisposition::Error
+            } else {
+                ToolResultDisposition::Success
+            },
+            Vec::new(),
+        )
    }

    /// Create a tool result item with durable, prunable structured attachments.
@@ -272,11 +285,33 @@ impl Item {
        is_error: bool,
        attachments: Vec<Attachment>,
    ) -> Self {
+        Self::tool_result_item_with_disposition_and_attachments(
+            call_id,
+            summary,
+            content,
+            if is_error {
+                ToolResultDisposition::Error
+            } else {
+                ToolResultDisposition::Success
+            },
+            attachments,
+        )
+    }
+
+    pub fn tool_result_item_with_disposition_and_attachments(
+        call_id: impl Into<String>,
+        summary: impl Into<String>,
+        content: Option<String>,
+        disposition: ToolResultDisposition,
+        attachments: Vec<Attachment>,
+    ) -> Self {
+        let is_error = !disposition.is_success();
        Self::ToolResult {
            id: None,
            call_id: call_id.into(),
            summary: summary.into(),
            content,
+            disposition,
            is_error,
            attachments,
        }
@@ -19,12 +19,12 @@ mod private {
 /// - Editing message history (add, delete, clear)
 /// - Registering tools and hooks
 ///
-/// Can transition to [`Locked`] state via `Engine::lock()`.
+/// Can transition to [`Locked`] state via `Engine::lock(&history)`.
 ///
 /// # Examples
 ///
 /// ```ignore
-/// use llm_engine::Engine;
+/// use agen::Engine;
 ///
 /// let mut engine = Engine::new(client)
 ///     .system_prompt("You are helpful.");
@@ -348,7 +348,7 @@ where
 /// # Examples
 ///
 /// ```ignore
-/// use llm_engine::{Timeline, Handler, TextBlockKind, TextBlockEvent};
+/// use agen::{Timeline, Handler, TextBlockKind, TextBlockEvent};
 ///
 /// struct MyHandler;
 /// impl Handler<TextBlockKind> for MyHandler {
@@ -3,7 +3,14 @@
 //! Traits for defining tools callable by LLM.
 //! Usually auto-implemented using the `#[tool]` macro.

-use std::{collections::HashMap, fmt, sync::Arc};
+use std::{
+    collections::HashMap,
+    fmt,
+    future::Future,
+    pin::Pin,
+    sync::Arc,
+    task::{Context, Poll},
+};

 use async_trait::async_trait;
 use base64::{Engine as _, engine::general_purpose::STANDARD};
@@ -23,6 +30,12 @@ pub enum ToolError {
    /// Internal error
    #[error("Internal error: {0}")]
    Internal(String),
+    /// Cooperative cancellation completed with bounded terminal output.
+    #[error("Tool execution cancelled")]
+    Cancelled(ToolOutput),
+    /// Execution was interrupted with a confirmed bounded terminal output.
+    #[error("Tool execution interrupted")]
+    Interrupted(ToolOutput),
 }

 // =============================================================================
@@ -158,6 +171,28 @@ pub enum Attachment {
    Image(ImageAttachment),
 }

+/// Terminal disposition of one started tool call.
+///
+/// `Cancelled` means the tool confirmed cancellation. `OutcomeUnknown` means
+/// execution stopped without confirmation, so neither completion nor side
+/// effects may be inferred.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize, Default)]
+#[serde(rename_all = "snake_case")]
+pub enum ToolResultDisposition {
+    #[default]
+    Success,
+    Error,
+    Interrupted,
+    Cancelled,
+    OutcomeUnknown,
+}
+
+impl ToolResultDisposition {
+    pub const fn is_success(&self) -> bool {
+        matches!(self, Self::Success)
+    }
+}
+
 /// Tool execution result.
 ///
 /// Every output has a mandatory `summary` (1-2 lines) that persists in
@@ -322,6 +357,12 @@ impl ToolExecutionContext {
        }
    }

+    /// Identifies one live execution attempt without making the batch id a durable
+    /// replay or idempotency authority.
+    pub fn execution_id(&self) -> String {
+        format!("{}:{}", self.batch_id, self.call_id)
+    }
+
    /// Context for direct, non-engine calls in unit tests and low-level callers.
    pub fn direct() -> Self {
        Self::new("direct", "direct", 0)
@@ -334,6 +375,142 @@ impl Default for ToolExecutionContext {
    }
 }

+/// The provider-confirmed terminal result of one started tool execution.
+///
+/// `OutcomeUnknown` is reserved for an execution task that had to be force-closed
+/// or failed before the provider could confirm its terminal result.
+#[derive(Debug)]
+pub enum ToolExecutionTerminal {
+    Confirmed(Result<ToolOutput, ToolError>),
+    OutcomeUnknown,
+}
+
+/// The completion future paired with a [`ToolExecutionHandle`]. Dropping this
+/// future does not drop the provider execution: the spawned execution remains
+/// owned by its handle until it completes or is explicitly force-closed.
+pub struct ToolExecutionTerminalFuture {
+    task: tokio::task::JoinHandle<Result<ToolOutput, ToolError>>,
+}
+
+impl Future for ToolExecutionTerminalFuture {
+    type Output = ToolExecutionTerminal;
+
+    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
+        match Pin::new(&mut self.task).poll(cx) {
+            Poll::Ready(Ok(result)) => Poll::Ready(ToolExecutionTerminal::Confirmed(result)),
+            Poll::Ready(Err(_)) => Poll::Ready(ToolExecutionTerminal::OutcomeUnknown),
+            Poll::Pending => Poll::Pending,
+        }
+    }
+}
+
+/// Live ownership and control for one started tool execution.
+///
+/// Execution, cancellation, and terminal confirmation remain provider-owned:
+/// this handle starts `Tool::execute`, delegates cooperative cancellation to
+/// `Tool::cancel_execution`, and treats execution-future completion as the
+/// provider's terminal confirmation. Agen may force-close only after its caller's
+/// deadline expires, at which point the outcome is necessarily unknown.
+#[derive(Clone)]
+pub struct ToolExecutionHandle {
+    inner: Arc<ToolExecutionHandleInner>,
+}
+
+struct ToolExecutionHandleInner {
+    tool: Arc<dyn Tool>,
+    context: ToolExecutionContext,
+    abort: tokio::task::AbortHandle,
+}
+
+impl Drop for ToolExecutionHandleInner {
+    fn drop(&mut self) {
+        // Losing the final live owner is an explicit forced close, never a
+        // best-effort detached provider future.
+        self.abort.abort();
+    }
+}
+
+impl fmt::Debug for ToolExecutionHandle {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("ToolExecutionHandle")
+            .field("call_id", &self.inner.context.call_id)
+            .field("batch_id", &self.inner.context.batch_id)
+            .finish_non_exhaustive()
+    }
+}
+
+impl ToolExecutionHandle {
+    pub fn start(
+        tool: Arc<dyn Tool>,
+        input_json: String,
+        context: ToolExecutionContext,
+    ) -> (Self, ToolExecutionTerminalFuture) {
+        let execution_tool = Arc::clone(&tool);
+        let execution_context = context.clone();
+        let task =
+            tokio::spawn(
+                async move { execution_tool.execute(&input_json, execution_context).await },
+            );
+        let abort = task.abort_handle();
+        (
+            Self {
+                inner: Arc::new(ToolExecutionHandleInner {
+                    tool,
+                    context,
+                    abort,
+                }),
+            },
+            ToolExecutionTerminalFuture { task },
+        )
+    }
+
+    pub fn context(&self) -> &ToolExecutionContext {
+        &self.inner.context
+    }
+
+    pub async fn cancel_before(&self, deadline: tokio::time::Instant) -> Result<(), ToolError> {
+        match tokio::time::timeout_at(
+            deadline,
+            self.inner.tool.cancel_execution(&self.inner.context),
+        )
+        .await
+        {
+            Ok(result) => result,
+            Err(_) => Err(ToolError::Internal(format!(
+                "tool cancellation request exceeded its deadline for call {}",
+                self.inner.context.call_id
+            ))),
+        }
+    }
+
+    pub fn force_close(&self) {
+        self.inner.abort.abort();
+    }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct ToolExecutionPolicy {
+    /// Time a pause waits for already-started providers to reach a natural safe
+    /// boundary before escalating to explicit cooperative cancellation.
+    pub pause_safe_boundary_timeout: std::time::Duration,
+    /// Maximum time allowed for a provider to accept one cooperative
+    /// cancellation request.
+    pub cancellation_request_timeout: std::time::Duration,
+    /// Maximum time allowed for all providers to confirm terminal results after
+    /// cancellation has been requested.
+    pub terminal_confirmation_timeout: std::time::Duration,
+}
+
+impl Default for ToolExecutionPolicy {
+    fn default() -> Self {
+        Self {
+            pause_safe_boundary_timeout: std::time::Duration::from_millis(100),
+            cancellation_request_timeout: std::time::Duration::from_millis(100),
+            terminal_confirmation_timeout: std::time::Duration::from_millis(500),
+        }
+    }
+}
+
 // =============================================================================
 // Tool trait
 // =============================================================================
@@ -364,7 +541,7 @@ impl Default for ToolExecutionContext {
 /// # Manual Implementation
 ///
 /// ```ignore
-/// use llm_engine::tool::{Tool, ToolError, ToolExecutionContext, ToolMeta, ToolDefinition, ToolOutput};
+/// use agen::tool::{Tool, ToolError, ToolExecutionContext, ToolMeta, ToolDefinition, ToolOutput};
 /// use std::sync::Arc;
 ///
 /// struct MyTool { counter: std::sync::atomic::AtomicUsize }
@@ -402,6 +579,26 @@ pub trait Tool: Send + Sync {
        input_json: &str,
        ctx: ToolExecutionContext,
    ) -> Result<ToolOutput, ToolError>;
+
+    /// Request cooperative cancellation for one started call.
+    ///
+    /// Implementations that own cancellable provider operations should signal
+    /// every live execution identified by `call_id`, then let `execute` return
+    /// the confirmed bounded terminal output. Direct callers may use this
+    /// compatibility surface; Agen uses [`Tool::cancel_execution`] so providers
+    /// can bind cancellation to one exact live attempt.
+    async fn cancel(&self, _call_id: &str) -> Result<(), ToolError> {
+        Ok(())
+    }
+
+    /// Request cooperative cancellation for one exact started execution.
+    ///
+    /// The default preserves existing tools by delegating to `cancel(call_id)`.
+    /// Providers with their own execution registry should override this method
+    /// and key cancellation by [`ToolExecutionContext::execution_id`].
+    async fn cancel_execution(&self, ctx: &ToolExecutionContext) -> Result<(), ToolError> {
+        self.cancel(&ctx.call_id).await
+    }
 }

 // =============================================================================
@@ -429,6 +626,9 @@ pub struct ToolCall {
 pub struct ToolResult {
    /// Corresponding tool call ID
    pub tool_use_id: String,
+    /// Typed terminal state.
+    #[serde(default, skip_serializing_if = "ToolResultDisposition::is_success")]
+    pub disposition: ToolResultDisposition,
    /// Short summary (always kept in history)
    pub summary: String,
    /// Detailed output (prunable)
@@ -445,11 +645,20 @@ pub struct ToolResult {
 impl ToolResult {
    /// Create a success result from a [`ToolOutput`].
    pub fn from_output(tool_use_id: impl Into<String>, output: ToolOutput) -> Self {
+        Self::from_output_with_disposition(tool_use_id, output, ToolResultDisposition::Success)
+    }
+
+    pub fn from_output_with_disposition(
+        tool_use_id: impl Into<String>,
+        output: ToolOutput,
+        disposition: ToolResultDisposition,
+    ) -> Self {
        Self {
            tool_use_id: tool_use_id.into(),
+            disposition,
            summary: output.summary,
            content: output.content,
-            is_error: false,
+            is_error: !disposition.is_success(),
            attachments: output.attachments,
        }
    }
@@ -458,12 +667,28 @@ impl ToolResult {
    pub fn error(tool_use_id: impl Into<String>, message: impl Into<String>) -> Self {
        Self {
            tool_use_id: tool_use_id.into(),
+            disposition: ToolResultDisposition::Error,
            summary: message.into(),
            content: None,
            is_error: true,
            attachments: Vec::new(),
        }
    }
+
+    /// Close an execution whose completion and side effects cannot be confirmed.
+    pub fn outcome_unknown(tool_use_id: impl Into<String>) -> Self {
+        Self {
+            tool_use_id: tool_use_id.into(),
+            disposition: ToolResultDisposition::OutcomeUnknown,
+            summary: "Tool execution outcome unknown".to_string(),
+            content: Some(
+                "Execution was interrupted before completion could be confirmed. Completion and side effects are unknown."
+                    .to_string(),
+            ),
+            is_error: true,
+            attachments: Vec::new(),
+        }
+    }
 }

 #[cfg(test)]
@@ -0,0 +1,84 @@
+mod common;
+
+use agen::llm_client::event::{Event, ResponseStatus, StatusEvent};
+use agen::{Engine, EngineError, History, HistoryEntry, Item, Role};
+use common::MockLlmClient;
+
+fn completed_text_events(text: &str) -> Vec<Event> {
+    vec![
+        Event::text_block_start(0),
+        Event::text_delta(0, text),
+        Event::text_block_stop(0, None),
+        Event::Status(StatusEvent {
+            status: ResponseStatus::Completed,
+        }),
+    ]
+}
+
+#[tokio::test]
+async fn run_preserves_item_annotations_without_projecting_them() {
+    let client = MockLlmClient::new(completed_text_events("assistant reply"));
+    let engine = Engine::<_, agen::state::Mutable, String>::new_annotated(client);
+    let mut history = History::<String>::new();
+    let mut next = 0usize;
+    let mut annotate = |item: &Item| {
+        next += 1;
+        let kind = match item {
+            Item::Message { role, .. } => match role {
+                Role::User => "user",
+                Role::Assistant => "assistant",
+                Role::System => "system",
+            },
+            Item::ToolCall { .. } => "tool_call",
+            Item::ToolResult { .. } => "tool_result",
+            Item::Reasoning { .. } => "reasoning",
+        };
+        Ok(format!("{next}:{kind}"))
+    };
+
+    let output = engine
+        .run_with_annotation(&mut history, "hello", &mut annotate)
+        .await;
+
+    assert!(matches!(output.result, agen::EngineRunExit::Finished));
+    assert_eq!(history.len(), 2);
+    assert_eq!(history.entries()[0].annotation, "1:user");
+    assert_eq!(history.entries()[1].annotation, "2:assistant");
+    assert_eq!(history.items_cloned().len(), 2);
+}
+
+#[test]
+fn append_failure_does_not_make_item_live() {
+    let client = MockLlmClient::new(vec![]);
+    let mut engine = Engine::<_, agen::state::Mutable, usize>::new_annotated(client);
+    let mut history = History::<usize>::new();
+    let mut fail = |_item: &Item| Err("commit failed".to_string());
+
+    let err = engine
+        .append_history_with(&mut history, [Item::user_message("uncommitted")], &mut fail)
+        .unwrap_err();
+
+    assert!(matches!(err, EngineError::HistoryAppend(message) if message == "commit failed"));
+    assert!(history.is_empty());
+}
+
+#[test]
+fn replacement_keeps_items_and_annotations_together() {
+    let mut history = History::from_entries(vec![
+        HistoryEntry::new(Item::user_message("old"), "old-ann".to_string()),
+        HistoryEntry::new(Item::user_message("second"), "second-ann".to_string()),
+    ]);
+
+    history.truncate(1);
+    assert_eq!(history.entries()[0].item.as_text(), Some("old"));
+    assert_eq!(history.entries()[0].annotation, "old-ann");
+
+    let previous = history.replace_entries(vec![HistoryEntry::new(
+        Item::user_message("restored"),
+        "restored-ann".to_string(),
+    )]);
+
+    assert_eq!(previous.len(), 1);
+    assert_eq!(history.entries()[0].item.as_text(), Some("restored"));
+    assert_eq!(history.entries()[0].annotation, "restored-ann");
+}
@@ -8,13 +8,13 @@ use std::sync::atomic::{AtomicUsize, Ordering};
 use std::sync::{Arc, Mutex};
 use std::time::Duration;

+use agen::Engine;
+use agen::llm_client::event::{Event, ResponseStatus, StatusEvent as ClientStatusEvent};
+use agen::llm_client::retry::RetryPolicy;
+use agen::llm_client::{ClientError, LlmClient, Request, ResponseStream};
+use agen::tool::{Tool, ToolDefinition, ToolError, ToolMeta, ToolOutput};
 use async_trait::async_trait;
 use common::MockLlmClient;
-use llm_engine::Engine;
-use llm_engine::llm_client::event::{Event, ResponseStatus, StatusEvent as ClientStatusEvent};
-use llm_engine::llm_client::retry::RetryPolicy;
-use llm_engine::llm_client::{ClientError, LlmClient, Request, ResponseStream};
-use llm_engine::tool::{Tool, ToolDefinition, ToolError, ToolMeta, ToolOutput};

 #[derive(Clone)]
 struct FailOnceClient {
@@ -58,6 +58,7 @@ async fn test_callback_llm_retry_event() {
        max_attempts: 2,
        total_timeout: Duration::from_secs(1),
    });
+    let mut history = agen::History::new();

    let notices = Arc::new(Mutex::new(Vec::new()));
    let sink = notices.clone();
@@ -65,8 +66,11 @@ async fn test_callback_llm_retry_event() {
        sink.lock().unwrap().push((llm_call, notice.clone()));
    });

-    let result = engine.run("retry once").await;
-    assert!(result.is_ok(), "engine should succeed after one retry");
+    let result = engine.run(&mut history, "retry once").await;
+    assert!(
+        matches!(result.result, agen::EngineRunExit::Finished),
+        "engine should succeed after one retry"
+    );

    let notices = notices.lock().unwrap();
    assert_eq!(notices.len(), 1);
@@ -91,6 +95,7 @@ async fn test_callback_text_block_events() {

    let client = MockLlmClient::new(events);
    let mut engine = Engine::new(client);
+    let mut history = agen::History::new();

    let text_deltas = Arc::new(Mutex::new(Vec::new()));
    let text_completes = Arc::new(Mutex::new(Vec::new()));
@@ -108,9 +113,12 @@ async fn test_callback_text_block_events() {
        });
    });

-    // Mutable::run consumes self, returns (Locked, EngineResult)
-    let result = engine.run("Greet me").await;
-    assert!(result.is_ok(), "Engine should complete");
+    // Mutable::run consumes self, returns (Locked, EngineRunExit)
+    let result = engine.run(&mut history, "Greet me").await;
+    assert!(
+        matches!(result.result, agen::EngineRunExit::Finished),
+        "Engine should complete"
+    );

    let deltas = text_deltas.lock().unwrap();
    assert_eq!(deltas.len(), 2);
@@ -137,6 +145,7 @@ async fn test_callback_tool_call_complete() {

    let client = MockLlmClient::new(events);
    let mut engine = Engine::new(client);
+    let mut history = agen::History::new();

    let tool_starts = Arc::new(Mutex::new(Vec::<(String, String)>::new()));
    let tool_completes = Arc::new(Mutex::new(Vec::new()));
@@ -154,8 +163,8 @@ async fn test_callback_tool_call_complete() {
        });
    });

-    // Mutable::run consumes self, returns (Locked, EngineResult)
-    let _ = engine.run("Weather please").await;
+    // Mutable::run consumes self, returns (Locked, EngineRunExit)
+    let _ = engine.run(&mut history, "Weather please").await;

    let starts = tool_starts.lock().unwrap();
    assert_eq!(starts.len(), 1);
@@ -183,6 +192,7 @@ async fn test_callback_turn_events() {

    let client = MockLlmClient::new(events);
    let mut engine = Engine::new(client);
+    let mut history = agen::History::new();

    let turn_starts = Arc::new(Mutex::new(Vec::new()));
    let turn_ends = Arc::new(Mutex::new(Vec::new()));
@@ -197,9 +207,9 @@ async fn test_callback_turn_events() {
        ends.lock().unwrap().push(turn);
    });

-    // Mutable::run consumes self, returns (Locked, EngineResult)
-    let result = engine.run("Do something").await;
-    assert!(result.is_ok());
+    // Mutable::run consumes self, returns (Locked, EngineRunExit)
+    let result = engine.run(&mut history, "Do something").await;
+    assert!(matches!(result.result, agen::EngineRunExit::Finished));

    let starts = turn_starts.lock().unwrap();
    let ends = turn_ends.lock().unwrap();
@@ -221,7 +231,7 @@ impl Tool for FixedOutputTool {
    async fn execute(
        &self,
        _input_json: &str,
-        _ctx: llm_engine::tool::ToolExecutionContext,
+        _ctx: agen::tool::ToolExecutionContext,
    ) -> Result<ToolOutput, ToolError> {
        Ok(self.output.clone())
    }
@@ -254,12 +264,14 @@ async fn test_callback_tool_result_events() {

    let client = MockLlmClient::new(events);
    let mut engine = Engine::new(client);
+    let mut history = agen::History::new();

    engine.register_tool(fixed_tool(
        "fixed",
        ToolOutput {
            summary: "did the thing".into(),
            content: Some("full detail body".into()),
+            attachments: Vec::new(),
        },
    ));

@@ -275,7 +287,7 @@ async fn test_callback_tool_result_events() {
        ));
    });

-    let _ = engine.run("call it").await;
+    let _ = engine.run(&mut history, "call it").await;

    let observed = captured.lock().unwrap();
    assert_eq!(observed.len(), 1);
@@ -296,7 +308,7 @@ impl Tool for ErroringTool {
    async fn execute(
        &self,
        _input_json: &str,
-        _ctx: llm_engine::tool::ToolExecutionContext,
+        _ctx: agen::tool::ToolExecutionContext,
    ) -> Result<ToolOutput, ToolError> {
        Err(ToolError::ExecutionFailed(self.message.clone()))
    }
@@ -329,6 +341,7 @@ async fn test_callback_tool_result_error_path() {

    let client = MockLlmClient::new(events);
    let mut engine = Engine::new(client);
+    let mut history = agen::History::new();

    engine.register_tool(erroring_tool("erroring", "boom"));

@@ -344,7 +357,7 @@ async fn test_callback_tool_result_error_path() {
        ));
    });

-    let _ = engine.run("fail it").await;
+    let _ = engine.run(&mut history, "fail it").await;

    let observed = captured.lock().unwrap();
    assert_eq!(observed.len(), 1);
@@ -373,6 +386,7 @@ async fn test_callback_usage_events() {

    let client = MockLlmClient::new(events);
    let mut engine = Engine::new(client);
+    let mut history = agen::History::new();

    let usage_events = Arc::new(Mutex::new(Vec::new()));

@@ -381,8 +395,8 @@ async fn test_callback_usage_events() {
        usages.lock().unwrap().push(event.clone());
    });

-    // Mutable::run consumes self, returns (Locked, EngineResult)
-    let _ = engine.run("Hello").await;
+    // Mutable::run consumes self, returns (Locked, EngineRunExit)
+    let _ = engine.run(&mut history, "Hello").await;

    let usages = usage_events.lock().unwrap();
    assert_eq!(usages.len(), 1);
@@ -6,11 +6,11 @@ use std::path::{Path, PathBuf};
 use std::pin::Pin;
 use std::sync::{Arc, Mutex};

+use agen::llm_client::event::{BlockType, DeltaContent, Event};
+use agen::llm_client::{ClientError, LlmClient, Request};
+use agen::timeline::{Handler, TextBlockEvent, TextBlockKind, Timeline};
 use async_trait::async_trait;
 use futures::Stream;
-use llm_engine::llm_client::event::{BlockType, DeltaContent, Event};
-use llm_engine::llm_client::{ClientError, LlmClient, Request};
-use llm_engine::timeline::{Handler, TextBlockEvent, TextBlockKind, Timeline};

 use std::sync::atomic::{AtomicUsize, Ordering};

@@ -19,6 +19,7 @@ use std::sync::atomic::{AtomicUsize, Ordering};
 pub struct MockLlmClient {
    responses: Arc<Vec<Vec<Event>>>,
    call_count: Arc<AtomicUsize>,
+    requests: Arc<Mutex<Vec<Request>>>,
 }

 impl MockLlmClient {
@@ -30,6 +31,7 @@ impl MockLlmClient {
        Self {
            responses: Arc::new(responses),
            call_count: Arc::new(AtomicUsize::new(0)),
+            requests: Arc::new(Mutex::new(Vec::new())),
        }
    }

@@ -41,6 +43,10 @@ impl MockLlmClient {
    pub fn event_count(&self) -> usize {
        self.responses.iter().map(|v| v.len()).sum()
    }
+
+    pub fn requests(&self) -> Vec<Request> {
+        self.requests.lock().unwrap().clone()
+    }
 }

 #[async_trait]
@@ -51,8 +57,9 @@ impl LlmClient for MockLlmClient {

    async fn stream(
        &self,
-        _request: Request,
+        request: Request,
    ) -> Result<Pin<Box<dyn Stream<Item = Result<Event, ClientError>> + Send>>, ClientError> {
+        self.requests.lock().unwrap().push(request);
        let count = self.call_count.fetch_add(1, Ordering::SeqCst);
        if count >= self.responses.len() {
            return Err(ClientError::Api {
@@ -272,7 +279,7 @@ pub fn assert_timeline_integration(subdir: &str) {
    });

    for event in &events {
-        let timeline_event: llm_engine::timeline::event::Event = event.clone().into();
+        let timeline_event: agen::timeline::event::Event = event.clone().into();
        timeline.dispatch(&timeline_event);
    }

@@ -9,10 +9,10 @@ use std::path::Path;
 use std::sync::Arc;
 use std::sync::atomic::{AtomicUsize, Ordering};

+use agen::Engine;
+use agen::tool::{Tool, ToolDefinition, ToolError, ToolMeta, ToolOutput};
 use async_trait::async_trait;
 use common::MockLlmClient;
-use llm_engine::Engine;
-use llm_engine::tool::{Tool, ToolDefinition, ToolError, ToolMeta, ToolOutput};

 /// Fixture directory path
 fn fixtures_dir() -> std::path::PathBuf {
@@ -61,7 +61,7 @@ impl Tool for MockWeatherTool {
    async fn execute(
        &self,
        input_json: &str,
-        _ctx: llm_engine::tool::ToolExecutionContext,
+        _ctx: agen::tool::ToolExecutionContext,
    ) -> Result<ToolOutput, ToolError> {
        self.call_count.fetch_add(1, Ordering::SeqCst);

@@ -102,7 +102,7 @@ fn test_mock_client_from_fixture() {
 /// Creates a client with programmatically constructed events instead of using fixture files.
 #[test]
 fn test_mock_client_from_events() {
-    use llm_engine::llm_client::event::Event;
+    use agen::llm_client::event::Event;

    // Specify events directly
    let events = vec![
@@ -134,11 +134,15 @@ async fn test_engine_simple_text_response() {

    let client = MockLlmClient::from_fixture(&fixture_path).unwrap();
    let engine = Engine::new(client);
+    let mut history = agen::History::new();

    // Send a simple message (Mutable::run consumes self, returns tuple)
-    let result = engine.run("Hello").await;
+    let result = engine.run(&mut history, "Hello").await;

-    assert!(result.is_ok(), "Engine should complete successfully");
+    assert!(
+        matches!(result.result, agen::EngineRunExit::Finished),
+        "Engine should complete successfully"
+    );
 }

 /// Verify that Engine can correctly process responses containing tool calls
@@ -156,6 +160,7 @@ async fn test_engine_tool_call() {

    let client = MockLlmClient::from_fixture(&fixture_path).unwrap();
    let mut engine = Engine::new(client);
+    let mut history = agen::History::new();

    // Register tool
    let weather_tool = MockWeatherTool::new();
@@ -163,7 +168,9 @@ async fn test_engine_tool_call() {
    engine.register_tool(weather_tool.definition());

    // Send message (Mutable::run consumes self, returns tuple)
-    let _result = engine.run("What's the weather in Tokyo?").await;
+    let _result = engine
+        .run(&mut history, "What's the weather in Tokyo?")
+        .await;

    // Verify tool was called
    // Note: max_turns=1 so no request is sent after tool result
@@ -180,7 +187,7 @@ async fn test_engine_tool_call() {
 /// Useful when test independence is needed and external file dependency should be eliminated.
 #[tokio::test]
 async fn test_engine_with_programmatic_events() {
-    use llm_engine::llm_client::event::{Event, ResponseStatus, StatusEvent};
+    use agen::llm_client::event::{Event, ResponseStatus, StatusEvent};

    // Construct event sequence programmatically
    let events = vec![
@@ -195,11 +202,15 @@ async fn test_engine_with_programmatic_events() {

    let client = MockLlmClient::new(events);
    let engine = Engine::new(client);
+    let mut history = agen::History::new();

    // Mutable::run consumes self, returns tuple
-    let result = engine.run("Greet me").await;
+    let result = engine.run(&mut history, "Greet me").await;

-    assert!(result.is_ok(), "Engine should complete successfully");
+    assert!(
+        matches!(result.result, agen::EngineRunExit::Finished),
+        "Engine should complete successfully"
+    );
 }

 /// Verify that ToolCallCollector correctly collects ToolCall from ToolUse block events
@@ -208,8 +219,8 @@ async fn test_engine_with_programmatic_events() {
 /// correctly extracts id, name, and input (JSON).
 #[tokio::test]
 async fn test_tool_call_collector_integration() {
-    use llm_engine::llm_client::event::Event;
-    use llm_engine::timeline::{Timeline, ToolCallCollector};
+    use agen::llm_client::event::Event;
+    use agen::timeline::{Timeline, ToolCallCollector};

    // Event sequence containing ToolUse block
    let events = vec![
@@ -225,7 +236,7 @@ async fn test_tool_call_collector_integration() {

    // Dispatch events
    for event in &events {
-        let timeline_event: llm_engine::timeline::event::Event = event.clone().into();
+        let timeline_event: agen::timeline::event::Event = event.clone().into();
        timeline.dispatch(&timeline_event);
    }

@@ -8,12 +8,15 @@ mod common;
 use std::sync::atomic::{AtomicUsize, Ordering};
 use std::sync::{Arc, Mutex};

+use agen::Item;
+use agen::interceptor::{
+    Interceptor, PreRequestAction, PreToolAction, ToolCallInfo, TurnEndAction,
+};
+use agen::llm_client::event::{Event, ResponseStatus, StatusEvent};
+use agen::tool::{Tool, ToolDefinition, ToolError, ToolMeta, ToolOutput};
+use agen::{Engine, EngineError, EngineRunExit, History, StopReason};
 use async_trait::async_trait;
 use common::MockLlmClient;
-use llm_engine::Item;
-use llm_engine::llm_client::event::{Event, ResponseStatus, StatusEvent};
-use llm_engine::tool::{Tool, ToolDefinition, ToolError, ToolMeta, ToolOutput};
-use llm_engine::{Engine, EngineError};

 // =============================================================================
 // Mutable State Tests
@@ -39,36 +42,37 @@ fn test_mutable_set_system_prompt() {
 fn test_mutable_history_manipulation() {
    let client = MockLlmClient::new(vec![]);
    let mut engine = Engine::new(client);
+    let mut history: History = History::new();

    // Initial state is empty
-    assert!(engine.history().is_empty());
+    assert!(history.is_empty());

    // Add to history
    engine
-        .append_history(vec![Item::user_message("Hello")])
+        .append_history(&mut history, vec![Item::user_message("Hello")])
        .unwrap();
    engine
-        .append_history(vec![Item::assistant_message("Hi there!")])
+        .append_history(&mut history, vec![Item::assistant_message("Hi there!")])
        .unwrap();
-    assert_eq!(engine.history().len(), 2);
+    assert_eq!(history.len(), 2);

    // Append to history via the callback-aware API.
    engine
-        .append_history(vec![Item::user_message("How are you?")])
+        .append_history(&mut history, vec![Item::user_message("How are you?")])
        .unwrap();
-    assert_eq!(engine.history().len(), 3);
+    assert_eq!(history.len(), 3);

    // Clear history
-    engine.clear_history();
-    assert!(engine.history().is_empty());
+    engine.clear_history(&mut history);
+    assert!(history.is_empty());

    // Set history
    let items = vec![
        Item::user_message("Test"),
        Item::assistant_message("Response"),
    ];
-    engine.set_history(items);
-    assert_eq!(engine.history().len(), 2);
+    engine.set_history(&mut history, items);
+    assert_eq!(history.len(), 2);
 }

 /// Verify that Engine can be constructed using builder pattern
@@ -76,9 +80,10 @@ fn test_mutable_history_manipulation() {
 fn test_mutable_builder_pattern() {
    let client = MockLlmClient::new(vec![]);
    let engine = Engine::new(client).system_prompt("System prompt");
+    let history: History = History::new();

    assert_eq!(engine.get_system_prompt(), Some("System prompt"));
-    assert!(engine.history().is_empty());
+    assert!(history.is_empty());
 }

 /// Verify that multiple items can be added with append_history and callbacks fire.
@@ -88,6 +93,7 @@ fn test_mutable_append_history() {
    let observed = Arc::new(Mutex::new(Vec::new()));
    let observed_for_callback = Arc::clone(&observed);
    let mut engine = Engine::new(client);
+    let mut history: History = History::new();
    engine.on_history_append(move |item| {
        if let Some(text) = item.as_text() {
            observed_for_callback.lock().unwrap().push(text.to_string());
@@ -96,18 +102,21 @@ fn test_mutable_append_history() {
    });

    engine
-        .append_history(vec![Item::user_message("First")])
+        .append_history(&mut history, vec![Item::user_message("First")])
        .unwrap();

    engine
-        .append_history(vec![
-            Item::assistant_message("Response 1"),
-            Item::user_message("Second"),
-            Item::assistant_message("Response 2"),
-        ])
+        .append_history(
+            &mut history,
+            vec![
+                Item::assistant_message("Response 1"),
+                Item::user_message("Second"),
+                Item::assistant_message("Response 2"),
+            ],
+        )
        .unwrap();

-    assert_eq!(engine.history().len(), 4);
+    assert_eq!(history.len(), 4);
    assert_eq!(
        observed.lock().unwrap().as_slice(),
        ["First", "Response 1", "Second", "Response 2"]
@@ -150,7 +159,7 @@ impl Tool for CountingTool {
    async fn execute(
        &self,
        _input_json: &str,
-        _ctx: llm_engine::tool::ToolExecutionContext,
+        _ctx: agen::tool::ToolExecutionContext,
    ) -> Result<ToolOutput, ToolError> {
        self.calls.fetch_add(1, Ordering::SeqCst);
        Ok(format!("{}-ok", self.name).into())
@@ -182,6 +191,7 @@ async fn history_append_failure_stops_before_tool_execution() {
    ]);
    let tool = CountingTool::new("count_tool");
    let mut engine = Engine::new(client);
+    let mut history: History = History::new();
    engine.register_tool(tool.definition());
    engine.on_history_append(|item| {
        if item.is_tool_call() {
@@ -191,15 +201,15 @@ async fn history_append_failure_stops_before_tool_execution() {
        }
    });

-    let mut engine = engine.lock();
-    let error = engine.run("use the tool").await.unwrap_err();
+    let mut engine = engine.lock(&history);
+    let exit = engine.run(&mut history, "use the tool").await;

    assert!(
-        matches!(error, EngineError::HistoryAppend(ref message) if message == "simulated ENOSPC")
+        matches!(exit, EngineRunExit::Interrupted(StopReason::Unexpected(EngineError::HistoryAppend(ref message))) if message == "simulated ENOSPC")
    );
    assert_eq!(tool.call_count(), 0);
-    assert_eq!(engine.history().len(), 1);
-    assert_eq!(engine.history()[0].as_text(), Some("use the tool"));
+    assert_eq!(history.len(), 1);
+    assert_eq!(history.entries()[0].item.as_text(), Some("use the tool"));
 }

 // =============================================================================
@@ -211,21 +221,22 @@ async fn history_append_failure_stops_before_tool_execution() {
 fn test_lock_transition() {
    let client = MockLlmClient::new(vec![]);
    let mut engine = Engine::new(client);
+    let mut history: History = History::new();

    engine.set_system_prompt("System");
    engine
-        .append_history(vec![Item::user_message("Hello")])
+        .append_history(&mut history, vec![Item::user_message("Hello")])
        .unwrap();
    engine
-        .append_history(vec![Item::assistant_message("Hi")])
+        .append_history(&mut history, vec![Item::assistant_message("Hi")])
        .unwrap();

    // Lock
-    let locked_engine = engine.lock();
+    let locked_engine = engine.lock(&history);

    // History and system prompt are still accessible in Locked state
    assert_eq!(locked_engine.get_system_prompt(), Some("System"));
-    assert_eq!(locked_engine.history().len(), 2);
+    assert_eq!(history.len(), 2);
    assert_eq!(locked_engine.locked_prefix_len(), 2);
 }

@@ -234,21 +245,22 @@ fn test_lock_transition() {
 fn test_unlock_transition() {
    let client = MockLlmClient::new(vec![]);
    let mut engine = Engine::new(client);
+    let mut history: History = History::new();

    engine
-        .append_history(vec![Item::user_message("Hello")])
+        .append_history(&mut history, vec![Item::user_message("Hello")])
        .unwrap();
-    let locked_engine = engine.lock();
+    let locked_engine = engine.lock(&history);

    // Unlock
    let mut engine = locked_engine.unlock();

    // History operations are available again in Mutable state
    engine
-        .append_history(vec![Item::assistant_message("Hi")])
+        .append_history(&mut history, vec![Item::assistant_message("Hi")])
        .unwrap();
-    engine.clear_history();
-    assert!(engine.history().is_empty());
+    engine.clear_history(&mut history);
+    assert!(history.is_empty());
 }

 // =============================================================================
@@ -269,20 +281,20 @@ async fn test_mutable_run_updates_history() -> Result<(), EngineError> {

    let client = MockLlmClient::new(events);
    let engine = Engine::new(client);
+    let mut history: History = History::new();

    // Execute (Mutable::run consumes self, returns EngineRunOutput)
-    let out = engine.run("Hi there").await?;
-    let engine = out.engine;
+    let _out = engine.run(&mut history, "Hi there").await;

    // History is updated
-    let history = engine.history();
+    let entries = history.entries();
    assert_eq!(history.len(), 2); // user + assistant

    // User message
-    assert_eq!(history[0].as_text(), Some("Hi there"));
+    assert_eq!(entries[0].item.as_text(), Some("Hi there"));

    // Assistant message
-    assert_eq!(history[1].as_text(), Some("Hello, I'm an assistant!"));
+    assert_eq!(entries[1].item.as_text(), Some("Hello, I'm an assistant!"));

    Ok(())
 }
@@ -313,35 +325,36 @@ async fn test_locked_multi_turn_history_accumulation() {
    ]);

    let engine = Engine::new(client).system_prompt("You are helpful.");
+    let mut history: History = History::new();

    // Lock (after setting system prompt)
-    let mut locked_engine = engine.lock();
+    let mut locked_engine = engine.lock(&history);
    assert_eq!(locked_engine.locked_prefix_len(), 0); // No items yet

    // Turn 1
-    let result1 = locked_engine.run("Hello!").await;
-    assert!(result1.is_ok());
-    assert_eq!(locked_engine.history().len(), 2); // user + assistant
+    let result1 = locked_engine.run(&mut history, "Hello!").await;
+    assert!(matches!(result1, EngineRunExit::Finished));
+    assert_eq!(history.len(), 2); // user + assistant

    // Turn 2
-    let result2 = locked_engine.run("Can you help me?").await;
-    assert!(result2.is_ok());
-    assert_eq!(locked_engine.history().len(), 4); // 2 * (user + assistant)
+    let result2 = locked_engine.run(&mut history, "Can you help me?").await;
+    assert!(matches!(result2, EngineRunExit::Finished));
+    assert_eq!(history.len(), 4); // 2 * (user + assistant)

    // Verify history contents
-    let history = locked_engine.history();
+    let entries = history.entries();

    // Turn 1 user message
-    assert_eq!(history[0].as_text(), Some("Hello!"));
+    assert_eq!(entries[0].item.as_text(), Some("Hello!"));

    // Turn 1 assistant message
-    assert_eq!(history[1].as_text(), Some("Nice to meet you!"));
+    assert_eq!(entries[1].item.as_text(), Some("Nice to meet you!"));

    // Turn 2 user message
-    assert_eq!(history[2].as_text(), Some("Can you help me?"));
+    assert_eq!(entries[2].item.as_text(), Some("Can you help me?"));

    // Turn 2 assistant message
-    assert_eq!(history[3].as_text(), Some("I can help with that."));
+    assert_eq!(entries[3].item.as_text(), Some("I can help with that."));
 }

 /// Verify that locked_prefix_len correctly records history length at lock time
@@ -367,26 +380,33 @@ async fn test_locked_prefix_len_tracking() {
    ]);

    let mut engine = Engine::new(client);
+    let mut history: History = History::new();

    // Add items beforehand
    engine
-        .append_history(vec![Item::user_message("Pre-existing message 1")])
+        .append_history(
+            &mut history,
+            vec![Item::user_message("Pre-existing message 1")],
+        )
        .unwrap();
    engine
-        .append_history(vec![Item::assistant_message("Pre-existing response 1")])
+        .append_history(
+            &mut history,
+            vec![Item::assistant_message("Pre-existing response 1")],
+        )
        .unwrap();

-    assert_eq!(engine.history().len(), 2);
+    assert_eq!(history.len(), 2);

    // Lock
-    let mut locked_engine = engine.lock();
+    let mut locked_engine = engine.lock(&history);
    assert_eq!(locked_engine.locked_prefix_len(), 2); // 2 items at lock time

    // Execute turn
-    locked_engine.run("New message").await.unwrap();
+    locked_engine.run(&mut history, "New message").await;

    // History grows but locked_prefix_len remains unchanged
-    assert_eq!(locked_engine.history().len(), 4); // 2 + 2
+    assert_eq!(history.len(), 4); // 2 + 2
    assert_eq!(locked_engine.locked_prefix_len(), 2); // Unchanged
 }

@@ -413,18 +433,22 @@ async fn test_turn_count_increment() -> Result<(), EngineError> {
    ]);

    let engine = Engine::new(client);
+    let mut history: History = History::new();

    assert_eq!(engine.turn_count(), 0);
    assert_eq!(engine.llm_call_count(), 0);

    // First run consumes Mutable, returns EngineRunOutput
-    let mut engine = engine.run("First").await?.engine;
+    let mut engine = engine.run(&mut history, "First").await.engine;
    assert_eq!(engine.turn_count(), 1);
    // Retry not yet implemented → AgentTurn:LlmCall is 1:1.
    assert_eq!(engine.llm_call_count(), 1);

    // Subsequent runs on Locked take &mut self
-    engine.run("Second").await?;
+    assert!(matches!(
+        engine.run(&mut history, "Second").await,
+        EngineRunExit::Finished
+    ));
    assert_eq!(engine.turn_count(), 2);
    assert_eq!(engine.llm_call_count(), 2);

@@ -444,28 +468,29 @@ async fn test_unlock_edit_relock() {
    ]]);

    let mut engine = Engine::new(client);
+    let mut history: History = History::new();
    engine
-        .append_history(vec![
-            Item::user_message("Hello"),
-            Item::assistant_message("Hi"),
-        ])
+        .append_history(
+            &mut history,
+            vec![Item::user_message("Hello"), Item::assistant_message("Hi")],
+        )
        .unwrap();

    // Lock -> Unlock
-    let locked = engine.lock();
+    let locked = engine.lock(&history);
    assert_eq!(locked.locked_prefix_len(), 2);

    let mut unlocked = locked.unlock();

    // Edit history
-    unlocked.clear_history();
+    unlocked.clear_history(&mut history);
    unlocked
-        .append_history(vec![Item::user_message("Fresh start")])
+        .append_history(&mut history, vec![Item::user_message("Fresh start")])
        .unwrap();

    // Re-lock
-    let relocked = unlocked.lock();
-    assert_eq!(relocked.history().len(), 1);
+    let relocked = unlocked.lock(&history);
+    assert_eq!(history.len(), 1);
    assert_eq!(relocked.locked_prefix_len(), 1);
 }

@@ -508,19 +533,26 @@ async fn test_lock_unlock_relock_tools_remain_effective() {
    ]);

    let mut engine = Engine::new(client);
+    let mut history: History = History::new();
    let tool_a = CountingTool::new("tool_a");
    engine.register_tool(tool_a.definition());

-    let mut locked = engine.lock();
-    locked.run("first").await.expect("first run");
+    let mut locked = engine.lock(&history);
+    assert!(matches!(
+        locked.run(&mut history, "first").await,
+        EngineRunExit::Finished
+    ));
    assert_eq!(tool_a.call_count(), 1, "tool_a should be called once");

    let mut unlocked = locked.unlock();
    let tool_b = CountingTool::new("tool_b");
    unlocked.register_tool(tool_b.definition());

-    let mut relocked = unlocked.lock();
-    relocked.run("second").await.expect("second run");
+    let mut relocked = unlocked.lock(&history);
+    assert!(matches!(
+        relocked.run(&mut history, "second").await,
+        EngineRunExit::Finished
+    ));

    assert_eq!(tool_a.call_count(), 1, "tool_a should not be called again");
    assert_eq!(tool_b.call_count(), 1, "tool_b should be called once");
@@ -535,8 +567,9 @@ async fn test_lock_unlock_relock_tools_remain_effective() {
 fn test_system_prompt_preserved_in_locked_state() {
    let client = MockLlmClient::new(vec![]);
    let engine = Engine::new(client).system_prompt("Important system prompt");
+    let history: History = History::new();

-    let locked = engine.lock();
+    let locked = engine.lock(&history);
    assert_eq!(locked.get_system_prompt(), Some("Important system prompt"));

    let unlocked = locked.unlock();
@@ -551,13 +584,228 @@ fn test_system_prompt_preserved_in_locked_state() {
 fn test_system_prompt_change_after_unlock() {
    let client = MockLlmClient::new(vec![]);
    let engine = Engine::new(client).system_prompt("Original prompt");
+    let history: History = History::new();

-    let locked = engine.lock();
+    let locked = engine.lock(&history);
    let mut unlocked = locked.unlock();

    unlocked.set_system_prompt("New prompt");
    assert_eq!(unlocked.get_system_prompt(), Some("New prompt"));

-    let relocked = unlocked.lock();
+    let relocked = unlocked.lock(&history);
    assert_eq!(relocked.get_system_prompt(), Some("New prompt"));
 }
+
+fn completed_text_events() -> Vec<Event> {
+    vec![
+        Event::text_block_start(0),
+        Event::text_delta(0, "done"),
+        Event::text_block_stop(0, None),
+        Event::Status(StatusEvent {
+            status: ResponseStatus::Completed,
+        }),
+    ]
+}
+
+struct YieldOnce {
+    calls: AtomicUsize,
+}
+
+#[async_trait]
+impl Interceptor for YieldOnce {
+    async fn pre_llm_request(&self, _context: &mut Vec<Item>) -> PreRequestAction {
+        if self.calls.fetch_add(1, Ordering::SeqCst) == 0 {
+            PreRequestAction::Yield
+        } else {
+            PreRequestAction::Continue
+        }
+    }
+}
+
+struct PauseToolOnce {
+    calls: AtomicUsize,
+}
+
+#[async_trait]
+impl Interceptor for PauseToolOnce {
+    async fn pre_tool_call(&self, _info: &mut ToolCallInfo) -> PreToolAction {
+        if self.calls.fetch_add(1, Ordering::SeqCst) == 0 {
+            PreToolAction::Pause
+        } else {
+            PreToolAction::Continue
+        }
+    }
+}
+
+struct ContinueTurnOnce {
+    calls: AtomicUsize,
+}
+
+#[async_trait]
+impl Interceptor for ContinueTurnOnce {
+    async fn on_turn_end(&self, _history: &[Item]) -> TurnEndAction {
+        if self.calls.fetch_add(1, Ordering::SeqCst) == 0 {
+            TurnEndAction::ContinueWithMessages(vec![Item::system_message("continue")])
+        } else {
+            TurnEndAction::Finish
+        }
+    }
+}
+
+#[tokio::test]
+async fn max_turns_is_scoped_to_each_fresh_run() {
+    let mut history: History = History::new();
+    let responses = vec![completed_text_events(), completed_text_events()];
+    let mut engine = Engine::new(MockLlmClient::with_responses(responses));
+    engine.set_max_turns(Some(1));
+    let mut engine = engine.lock(&history);
+
+    assert!(matches!(
+        engine.run(&mut history, "first").await,
+        EngineRunExit::Finished
+    ));
+    assert_eq!(engine.turn_count(), 1);
+    assert_eq!(engine.active_run_turn_count(), None);
+
+    assert!(matches!(
+        engine.run(&mut history, "second").await,
+        EngineRunExit::Finished
+    ));
+    assert_eq!(engine.turn_count(), 2);
+    assert_eq!(engine.active_run_turn_count(), None);
+}
+
+#[tokio::test]
+async fn yielded_resume_keeps_the_same_unspent_turn_budget() {
+    let mut history: History = History::new();
+    let mut engine = Engine::new(MockLlmClient::new(completed_text_events()));
+    engine.set_max_turns(Some(1));
+    engine.set_interceptor(YieldOnce {
+        calls: AtomicUsize::new(0),
+    });
+    let mut engine = engine.lock(&history);
+
+    assert!(matches!(
+        engine.run(&mut history, "start").await,
+        EngineRunExit::Yielded
+    ));
+    assert_eq!(engine.turn_count(), 0);
+    assert_eq!(engine.active_run_turn_count(), Some(0));
+
+    assert!(matches!(
+        engine.resume(&mut history).await,
+        EngineRunExit::Finished
+    ));
+    assert_eq!(engine.turn_count(), 1);
+    assert_eq!(engine.active_run_turn_count(), None);
+}
+
+#[tokio::test]
+async fn paused_tool_resume_does_not_reset_the_consumed_turn_budget() {
+    let mut history: History = History::new();
+    let events = vec![
+        Event::tool_use_start(0, "call_1", "count_tool"),
+        Event::tool_input_delta(0, "{}"),
+        Event::tool_use_stop(0),
+        Event::Status(StatusEvent {
+            status: ResponseStatus::Completed,
+        }),
+    ];
+    let tool = CountingTool::new("count_tool");
+    let mut engine = Engine::new(MockLlmClient::new(events));
+    engine.set_max_turns(Some(1));
+    engine.register_tool(tool.definition());
+    engine.set_interceptor(PauseToolOnce {
+        calls: AtomicUsize::new(0),
+    });
+    let mut engine = engine.lock(&history);
+
+    assert!(matches!(
+        engine.run(&mut history, "call it").await,
+        EngineRunExit::Paused
+    ));
+    assert_eq!(engine.turn_count(), 1);
+    assert_eq!(engine.active_run_turn_count(), Some(1));
+    assert_eq!(tool.call_count(), 0);
+
+    assert!(matches!(
+        engine.resume(&mut history).await,
+        EngineRunExit::Interrupted(StopReason::LimitReached)
+    ));
+    assert_eq!(engine.turn_count(), 1);
+    assert_eq!(engine.active_run_turn_count(), None);
+    assert_eq!(tool.call_count(), 1, "the consumed turn's tool still runs");
+}
+
+#[tokio::test]
+async fn fresh_input_abandons_a_paused_run_and_starts_a_new_budget() {
+    let mut history: History = History::new();
+    let tool_events = vec![
+        Event::tool_use_start(0, "call_1", "count_tool"),
+        Event::tool_input_delta(0, "{}"),
+        Event::tool_use_stop(0),
+        Event::Status(StatusEvent {
+            status: ResponseStatus::Completed,
+        }),
+    ];
+    let client = MockLlmClient::with_responses(vec![tool_events, completed_text_events()]);
+    let tool = CountingTool::new("count_tool");
+    let mut engine = Engine::new(client);
+    engine.set_max_turns(Some(1));
+    engine.register_tool(tool.definition());
+    engine.set_interceptor(PauseToolOnce {
+        calls: AtomicUsize::new(0),
+    });
+    let mut engine = engine.lock(&history);
+
+    assert!(matches!(
+        engine.run(&mut history, "pause").await,
+        EngineRunExit::Paused
+    ));
+    assert_eq!(engine.active_run_turn_count(), Some(1));
+
+    assert!(matches!(
+        engine.run(&mut history, "replace").await,
+        EngineRunExit::Finished
+    ));
+    assert_eq!(engine.turn_count(), 2);
+    assert_eq!(engine.active_run_turn_count(), None);
+    assert_eq!(tool.call_count(), 1, "pending-tool semantics are unchanged");
+}
+
+#[tokio::test]
+async fn interceptor_continuation_consumes_the_logical_run_budget() {
+    let mut history: History = History::new();
+    let mut engine = Engine::new(MockLlmClient::new(completed_text_events()));
+    engine.set_max_turns(Some(1));
+    engine.set_interceptor(ContinueTurnOnce {
+        calls: AtomicUsize::new(0),
+    });
+    let mut engine = engine.lock(&history);
+
+    assert!(matches!(
+        engine.run(&mut history, "start").await,
+        EngineRunExit::Interrupted(StopReason::LimitReached)
+    ));
+    assert_eq!(engine.turn_count(), 1);
+    assert_eq!(engine.llm_call_count(), 1);
+    assert_eq!(engine.active_run_turn_count(), None);
+}
+
+#[tokio::test]
+async fn restored_active_run_budget_is_enforced_before_another_llm_call() {
+    let mut history: History = History::new();
+    let mut engine = Engine::new(MockLlmClient::new(completed_text_events()));
+    engine.set_max_turns(Some(1));
+    engine.set_turn_count(7);
+    engine.set_active_run_turn_count(Some(1));
+    let mut engine = engine.lock(&history);
+
+    assert!(matches!(
+        engine.resume(&mut history).await,
+        EngineRunExit::Interrupted(StopReason::LimitReached)
+    ));
+    assert_eq!(engine.turn_count(), 7);
+    assert_eq!(engine.llm_call_count(), 0);
+    assert_eq!(engine.active_run_turn_count(), None);
+}
@@ -13,13 +13,13 @@

 mod common;

-use common::MockLlmClient;
-use llm_engine::Engine;
-use llm_engine::Item;
-use llm_engine::llm_client::event::{
+use agen::Item;
+use agen::llm_client::event::{
    BlockMetadata, BlockStart, BlockStop, BlockType, Event, ReasoningBlockData, ResponseStatus,
    StatusEvent,
 };
+use agen::{Engine, History};
+use common::MockLlmClient;

 fn reasoning_block(text: impl Into<String>, data: ReasoningBlockData) -> Vec<Event> {
    vec![
@@ -28,9 +28,9 @@ fn reasoning_block(text: impl Into<String>, data: ReasoningBlockData) -> Vec<Eve
            block_type: BlockType::Thinking,
            metadata: BlockMetadata::Thinking,
        }),
-        Event::BlockDelta(llm_engine::llm_client::event::BlockDelta {
+        Event::BlockDelta(agen::llm_client::event::BlockDelta {
            index: 100,
-            delta: llm_engine::llm_client::event::DeltaContent::Thinking(text.into()),
+            delta: agen::llm_client::event::DeltaContent::Thinking(text.into()),
        }),
        Event::BlockStop(BlockStop {
            index: 100,
@@ -65,15 +65,15 @@ async fn anthropic_thinking_round_trips_signature_into_history() {
    ]);
    let client = MockLlmClient::new(events);
    let engine = Engine::new(client);
-    let out = engine.run("question?").await.expect("run ok");
-    let engine = out.engine;
+    let mut history: History = History::new();
+    let _out = engine.run(&mut history, "question?").await;

-    let history = engine.history();
+    let entries = history.entries();
    // user / reasoning / assistant_message
    assert_eq!(history.len(), 3, "history: {history:?}");

-    assert!(matches!(history[0], Item::Message { .. }));
-    match &history[1] {
+    assert!(matches!(entries[0].item, Item::Message { .. }));
+    match &entries[1].item {
        Item::Reasoning {
            text, signature, ..
        } => {
@@ -82,7 +82,7 @@ async fn anthropic_thinking_round_trips_signature_into_history() {
        }
        other => panic!("expected Reasoning, got {other:?}"),
    }
-    assert_eq!(history[2].as_text(), Some("Here's the answer"));
+    assert_eq!(entries[2].item.as_text(), Some("Here's the answer"));
 }

 /// OpenAI Responses 風: encrypted_content + summary を持った reasoning が
@@ -109,11 +109,11 @@ async fn openai_reasoning_round_trips_encrypted_and_summary() {
    ]);
    let client = MockLlmClient::new(events);
    let engine = Engine::new(client);
-    let out = engine.run("q").await.expect("run ok");
-    let engine = out.engine;
+    let mut history: History = History::new();
+    let _out = engine.run(&mut history, "q").await;

-    let history = engine.history();
-    match &history[1] {
+    let entries = history.entries();
+    match &entries[1].item {
        Item::Reasoning {
            text,
            summary,
@@ -155,13 +155,13 @@ async fn reasoning_precedes_text_in_assistant_burst() {
    }));
    let client = MockLlmClient::new(events);
    let engine = Engine::new(client);
-    let out = engine.run("q").await.expect("run ok");
-    let engine = out.engine;
+    let mut history: History = History::new();
+    let _out = engine.run(&mut history, "q").await;

-    let history = engine.history();
+    let entries = history.entries();
    // user / reasoning(先頭) / assistant_message
-    assert!(matches!(history[1], Item::Reasoning { .. }));
-    assert_eq!(history[2].as_text(), Some("intermediate"));
+    assert!(matches!(entries[1].item, Item::Reasoning { .. }));
+    assert_eq!(entries[2].item.as_text(), Some("intermediate"));
 }

 /// resume シナリオ: history.json 由来の Item::Reasoning(signature) を Engine に
@@ -174,7 +174,7 @@ async fn injected_reasoning_survives_into_outgoing_request() {
    use std::pin::Pin;
    use std::sync::{Arc, Mutex};

-    use llm_engine::llm_client::{ClientError, LlmClient, Request};
+    use agen::llm_client::{ClientError, LlmClient, Request};

    /// Request を 1 度だけキャプチャして空ストリームを返す client。
    #[derive(Clone)]
@@ -207,14 +207,18 @@ async fn injected_reasoning_survives_into_outgoing_request() {
    };

    let mut engine = Engine::new(client);
+    let mut history: History = History::new();
    // resume: 既存 history を流し込む
-    engine.set_history(vec![
-        Item::user_message("prior question"),
-        Item::reasoning("prior thinking").with_signature("SIG-PRIOR"),
-        Item::assistant_message("prior answer"),
-    ]);
+    engine.set_history(
+        &mut history,
+        vec![
+            Item::user_message("prior question"),
+            Item::reasoning("prior thinking").with_signature("SIG-PRIOR"),
+            Item::assistant_message("prior answer"),
+        ],
+    );

-    let _ = engine.run("follow up").await.expect("run ok");
+    let _ = engine.run(&mut history, "follow up").await;

    let req = captured
        .lock()
@@ -5,12 +5,7 @@
 use std::sync::Arc;
 use std::sync::atomic::{AtomicUsize, Ordering};

-// Imports needed for macro expansion
-use schemars;
-use serde;
-
-use llm_engine::ToolExecutionContext;
-use llm_engine_macros::tool_registry;
+use agen::{ToolExecutionContext, tool_registry};

 // =============================================================================
 // Test: Basic Tool Generation
@@ -3,15 +3,15 @@
 //! Retry/backoff は Engine の lifecycle 管理に属するため、transport は 1 回だけ
 //! request を送り、HTTP status / Retry-After を `ClientError` に載せて返す。

+use agen::llm_client::LlmClient;
+use agen::llm_client::auth::AuthRequirement;
+use agen::llm_client::capability::ModelCapability;
+use agen::llm_client::error::ClientError;
+use agen::llm_client::event::Event;
+use agen::llm_client::scheme::Scheme;
+use agen::llm_client::transport::{HttpTransport, ResolvedAuth};
+use agen::llm_client::types::Request;
 use futures::StreamExt;
-use llm_engine::llm_client::LlmClient;
-use llm_engine::llm_client::auth::AuthRequirement;
-use llm_engine::llm_client::capability::ModelCapability;
-use llm_engine::llm_client::error::ClientError;
-use llm_engine::llm_client::event::Event;
-use llm_engine::llm_client::scheme::Scheme;
-use llm_engine::llm_client::transport::{HttpTransport, ResolvedAuth};
-use llm_engine::llm_client::types::Request;
 use serde_json::Value;
 use std::time::Duration;
 use wiremock::matchers::{method, path};
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Hare	402ae0d466	fix: replay annotated history in Web Console	2026-08-29 23:10:32 +09:00
Hare	acb3c6d68b	fix: separate Ticket keys from assignment identity	2026-08-29 22:52:03 +09:00
Hare	40ac83e632	chore: merge develop into hare/develop	2026-08-29 13:25:32 +09:00
Hare	58da395941	fix: merge workdir registry cleanup	2026-08-29 13:21:40 +09:00
Hare	0e3ef94c9e	feat: merge web console tool call presentation	2026-08-29 13:21:35 +09:00
Hare	1f68dfc2b5	fix: group grep content output by file	2026-08-28 02:05:12 +09:00
Hare	84977a464c	feat: improve web console tool call presentation	2026-08-28 00:05:00 +09:00
Hare	62ada5eaa4	fix: bound safe-boundary pause escalation	2026-08-27 23:57:20 +09:00
Hare	f5ff0b7c13	fix: confirm bash cancellation cleanup	2026-08-27 23:01:06 +09:00
Hare	3337cafcdf	feat: own cancellable tool execution lifecycle	2026-08-27 23:01:00 +09:00
Hare	e87784118b	fix: preserve resumable paused tool calls	2026-08-27 21:48:59 +09:00
Hare	40fada28ea	fix: preserve confirmed output on interceptor abort	2026-08-27 21:30:04 +09:00
Hare	58cc94d4b7	fix: terminalize interrupted tool executions	2026-08-27 20:54:13 +09:00
Hare	ccabea59c9	fix: terminalize parallel tool outputs on completion	2026-08-27 19:16:49 +09:00
Hare	8cc1dc042d	fix: remove deleted workdirs from registry	2026-08-27 18:36:17 +09:00
Hare	183c37446e	fix: fence running snapshots on input commit	2026-08-27 15:42:20 +09:00
Hare	7aa06afc45	chore: preserve reviewed source lineage # Conflicts: # crates/agen/README.md # crates/agen/examples/engine_cancel_demo.rs # crates/agen/examples/engine_cli.rs # crates/agen/src/engine.rs # crates/agen/tests/annotated_history_test.rs # crates/agen/tests/callback_test.rs # crates/agen/tests/engine_fixtures.rs # crates/agen/tests/engine_state_test.rs # crates/agen/tests/parallel_execution_test.rs # crates/agen/tests/reasoning_round_trip_test.rs # crates/session-store/tests/session_test.rs # crates/worker/src/worker.rs	2026-08-27 15:13:27 +09:00
Hare	1515a2fb86	fix: reconcile typed history with run exits	2026-08-27 15:12:05 +09:00
Hare	ec798c58d7	fix: preserve annotated history through rewind	2026-08-27 14:54:24 +09:00
Hare	e365189276	feat: add provenance-aware worker history	2026-08-27 14:54:24 +09:00
Hare	116d610ad0	fix: project Ticket mutation outputs to human keys	2026-08-27 14:18:48 +09:00
Hare	75c570962d	Merge commit '7edc588202dfbfd4c834f677f510ddda7f3d6451' into work/00001M10HW6BV-model-facing-resource-projection	2026-08-27 13:46:19 +09:00
Hare	cae8ac1799	fix: allow missing Objective query snippets	2026-08-27 13:46:10 +09:00
Hare	917cc222a3	fix: resolve relation summaries to Ticket keys	2026-08-27 13:22:08 +09:00
Hare	7edc588202	chore: refresh T-528 after T-541	2026-08-27 13:09:44 +09:00
Hare	c83461508b	Merge commit '21b3dd1da1b1bbf18799a0623bf67dbe6266067c' into work/00001M10HW6BV-model-facing-resource-projection	2026-08-27 13:09:15 +09:00
Hare	651d64f34d	Merge branch 'work/00001M10N3Z0H-ticket-detail-route-sync' into hare/develop	2026-08-27 12:57:52 +09:00
Hare	b98d4b59f5	fix: synchronize reused ticket detail routes	2026-08-27 12:55:01 +09:00
Hare	374449e663	feat: add provenance-aware worker history	2026-08-27 12:51:01 +09:00
Hare	4c876a201b	fix: validate projected resource keys canonically	2026-08-27 12:49:59 +09:00
Hare	21b3dd1da1	Merge commit '0496cd907bc7bb96e9aa1c6d385bedb616bf3233' into work/00001M10FJVA2-orchestrator-queue-notice	2026-08-27 12:46:27 +09:00
Hare	5ca0ea9228	fix: sanitize orchestrator queue attention	2026-08-27 12:46:10 +09:00
Hare	d5c3a68a37	fix: use Ticket resource keys in handoffs	2026-08-27 12:45:08 +09:00
Hare	2b33b9158d	chore: refresh T-528 against develop	2026-08-27 12:45:01 +09:00
Hare	b31642e284	feat: project Ticket and Objective human references	2026-08-27 12:39:28 +09:00
Hare	3a7a3307ef	fix: map internal worker terminal lifecycles	2026-08-27 12:27:55 +09:00
Hare	0496cd907b	fix: use Ticket resource keys in handoffs	2026-08-27 12:24:19 +09:00
Hare	975b4fa700	feat: add typed engine run exits	2026-08-27 11:42:49 +09:00
Hare	060f280fdf	fix: allow parent commands during write delegation	2026-08-27 11:27:27 +09:00
Hare	7aaf189247	fix: scope delegated commands by cwd	2026-08-27 11:11:06 +09:00
Hare	df6d99c07d	Merge branch 'develop' into hare/develop	2026-08-27 09:21:58 +09:00
Hare	63306cf017	feat: integrate runtime Git cache materialization	2026-08-27 08:30:38 +09:00
Hare	08be5e85e4	fix: preserve command sessions across access refresh	2026-08-27 08:09:22 +09:00
Hare	9843510e1f	fix: remove conflicting coder worker control provider	2026-08-26 23:52:25 +09:00
Hare	83bda3dfb2	fix: restore companion subworker control	2026-08-26 22:06:34 +09:00
Hare	0ab15aa227	chore: merge hare/develop into develop	2026-08-26 19:44:31 +09:00
Hare	29c2fb8e06	fix: refresh repository access for worker workdirs	2026-08-26 19:27:10 +09:00
Hare	4ebc465e8d	fix: constrain repository SSH commands to authorized source	2026-08-26 19:02:20 +09:00
Hare	4b132a21e9	fix: bind repository SSH secrets to one-shot resources	2026-08-26 18:28:22 +09:00
Hare	b644971d45	fix: preauthorize repository access without persisting secrets	2026-08-26 17:23:43 +09:00
Hare	df34533765	fix: broker read-only repository SSH operations	2026-08-26 16:48:37 +09:00
Hare	6f4efb36bb	fix: order optional feature service bindings	2026-08-26 16:28:54 +09:00
Hare	108d5b14d7	fix: withhold write-capable credentials from read-only sessions	2026-08-26 16:23:48 +09:00
Hare	f633b86b35	chore: integrate current develop for review	2026-08-26 16:12:48 +09:00
Hare	1873e18f8e	fix: enforce attachment access transitions	2026-08-26 16:10:39 +09:00
Hare	3cdcbb47bf	fix: preserve selector retries and workdir observations	2026-08-26 16:05:14 +09:00
Hare	aaa9c7987c	fix: reject ambiguous feature service providers	2026-08-26 16:01:06 +09:00
Hare	048007a042	test: complete tool output fixture	2026-08-26 15:47:34 +09:00
Hare	cb35b40b9d	feat: plan feature service installation	2026-08-26 15:47:27 +09:00
Hare	3b71fe03b4	fix: include merge request status regression in web tests	2026-08-26 15:27:19 +09:00
Hare	471db64bcc	fix: preserve repository access across retries	2026-08-26 15:21:52 +09:00
Hare	5e2234763c	fix: distinguish completed review requests in merge request status	2026-08-26 15:20:13 +09:00
Hare	1d140be715	feat: align merge request review workflow with selector refs	2026-08-26 15:03:26 +09:00
Hare	ffb2a34ae5	fix: enforce repository access and cache boundaries	2026-08-26 14:39:37 +09:00
Hare	ccf7de1a55	fix: preserve run budget across segment forks	2026-08-26 14:13:43 +09:00
Hare	ccf3c80d29	fix: clear abandoned run budget before compaction	2026-08-26 14:03:07 +09:00
Hare	3a3c89e0b4	feat: materialize repositories through runtime Git cache	2026-08-26 13:54:25 +09:00
Hare	17c629136a	fix: scope max turns to logical runs	2026-08-26 13:47:35 +09:00
Hare	52a5c4141f	chore: merge current develop into Ticket source	2026-08-26 12:24:14 +09:00
Hare	c9ba27c333	fix: update RepositoryRecord test URI access	2026-08-26 11:50:41 +09:00
Hare	46f6e2c58b	fix: complete Repository access management contracts	2026-08-26 11:38:23 +09:00
Hare	d1f47e5a22	fix: align Repository access DCDL fields	2026-08-26 11:06:19 +09:00
Hare	65de94bad3	feat: expose compaction as an internal worker	2026-08-26 10:39:43 +09:00
Hare	4e935c6203	test: refresh clean-build fixtures and assertions	2026-08-26 10:16:18 +09:00
Hare	eac07cf5a8	fix: provide subworker control service	2026-08-26 10:16:10 +09:00
Hare	260259d461	fix: return ticket queue outcomes to web clients	2026-08-26 10:16:03 +09:00
Hare	a9fb092834	feat: add Repository access settings UI	2026-08-26 08:51:23 +09:00
Hare	3a21a68792	feat: add Workspace Repository SSH secret authority	2026-08-26 08:51:15 +09:00
Hare	9d572d18bc	fix: accept reserved workers during initial flow resolution	2026-08-26 07:52:04 +09:00
Hare	f7852e8034	fix: remove misleading runtime capability projections	2026-08-26 06:19:33 +09:00
Hare	8c075de147	fix: allow remote runtime workdir creation	2026-08-26 05:13:21 +09:00
Hare	864367f4f5	fix: remove repository-local server configuration paths	2026-08-26 03:56:35 +09:00
Hare	33db2ea7f4	fix: unify browser origin configuration	2026-08-26 02:37:14 +09:00
Hare	8396d09891	fix: limit coder ticket comments to handoffs	2026-08-25 13:21:47 +09:00
Hare	bf7171924d	feat: integrate dependency queue planning	2026-08-25 13:08:09 +09:00
Hare	097c363fbc	fix: block internal dependency cycles in projections	2026-08-25 12:54:47 +09:00
Hare	7dd8809e38	fix: fail closed without queue target authority	2026-08-25 12:44:03 +09:00
Hare	1749757036	fix: align queue eligibility with target authority	2026-08-25 12:24:31 +09:00
Hare	5857e6121c	fix: preserve dependency queue atomicity	2026-08-25 12:05:43 +09:00
Hare	a41147916b	fix: confirm queue closures across clients	2026-08-25 11:51:40 +09:00
Hare	cabe38db1d	fix: align queue projections with dependency closure	2026-08-25 11:19:27 +09:00
Hare	f079479160	feat: queue ready dependency closures atomically	2026-08-25 10:53:31 +09:00
Hare	87e160a01a	test: track current migration version in dry run	2026-08-25 10:29:48 +09:00
Hare	f94d829bf8	feat: integrate hare/develop	2026-08-25 10:29:41 +09:00
Hare	9a05bfa0c3	feat: allow ticket implementation cancellation	2026-08-25 09:52:21 +09:00
Hare	c1d46859a3	fix: block cleanup for assigned workers	2026-08-25 09:39:33 +09:00
Hare	87ecbcb113	fix: validate non-worker ticket assignments	2026-08-25 08:09:31 +09:00
Hare	1fb2949561	fix: give reviewer write-scoped command tools	2026-08-25 04:45:17 +09:00
Hare	11be777fc0	fix: verify signed Workspace query targets	2026-08-25 01:12:24 +09:00
Hare	ff94161fc0	test: authenticate workdir route fixtures	2026-08-25 00:54:28 +09:00
Hare	c2ab9a950f	feat: integrate Workspace API authorization	2026-08-25 00:54:13 +09:00
Hare	8e26a0f5a8	chore: merge latest develop into Ticket source # Conflicts: # crates/workspace-server/src/store.rs	2026-08-24 23:24:12 +09:00
Hare	d1c15ee295	fix: protect direct auth mutation routes	2026-08-24 14:58:34 +09:00
Hare	00a96234c6	fix: enforce CSRF on server mutations	2026-08-24 14:50:15 +09:00
Hare	fc3b663510	fix: authorize Runtime profile archive fetches	2026-08-24 14:39:16 +09:00
Hare	e4e045d059	fix: preserve Workdir provider rejection codes	2026-08-24 14:30:34 +09:00
Hare	436feaf33d	fix: close remaining Workspace auth gaps	2026-08-24 14:28:44 +09:00
Hare	29f450b962	fix: map missing default Runtime to bad request	2026-08-24 14:16:38 +09:00
Hare	db343893c8	fix: secure HTTPS browser session cookies	2026-08-24 14:11:51 +09:00
Hare	554906ec02	fix: treat legacy Runtime config as unconfigured	2026-08-24 14:07:42 +09:00
Hare	18c37f4842	fix: persist Workdir Runtime failure classifications	2026-08-24 13:59:52 +09:00
Hare	83382b824a	fix: protect legacy Workspace API routes	2026-08-24 13:56:46 +09:00
Hare	6203316aa1	fix: defer local repository validation to runtimes	2026-08-24 13:46:02 +09:00
Hare	d57b4d1d5e	fix: align ticket queue projection test	2026-08-24 13:42:39 +09:00
Hare	379ae214fc	feat: queue tickets with dependency context	2026-08-24 13:40:33 +09:00
Hare	163a403636	feat: support typed remote repository sources	2026-08-24 13:35:19 +09:00
Hare	53edaadc3a	feat: authenticate Workspace API requests	2026-08-24 13:32:55 +09:00
Hare	3c2664c3ce	feat: sign Runtime workspace requests	2026-08-24 13:32:49 +09:00
Hare	d9048954a5	fix: reject unsupported Workdir runtimes before delegation	2026-08-24 13:24:59 +09:00
Hare	4f84dfd73f	feat: resolve default Runtime for Workdir creation	2026-08-24 13:15:18 +09:00
Hare	d69c367285	feat: prepare agen crates for publication	2026-08-23 03:41:51 +09:00
Hare	aa8dd4f89e	test: align workspace server fixtures with current authority	2026-08-23 02:19:36 +09:00
Hare	b12e0785e2	fix: migration error	2026-08-23 02:10:03 +09:00