From 8fd9e7d30bb4e80d9c96c2ca475ac53119707d4c Mon Sep 17 00:00:00 2001
From: Enrico Piovesan <enrico.piovesan10@gmail.com>
Date: Sat, 11 Jul 2026 21:13:31 -0600
Subject: [PATCH] Extract doc-approval-core-rs shared HTTP/SSE crate for GTK
 and CLI

linux-gtk and cli-rust now depend on a workspace crate for send_command,
session listing, and SSE events, mirroring traverse-core-rs from #59.

Co-authored-by: Cursor <cursoragent@cursor.com>
---
 AGENTS.md                                     |    2 +-
 README.md                                     |    2 +-
 apps/doc-approval/{linux-gtk => }/Cargo.lock  |  497 ++++-
 apps/doc-approval/Cargo.toml                  |    3 +
 apps/doc-approval/cli-rust/Cargo.lock         | 1817 -----------------
 apps/doc-approval/cli-rust/Cargo.toml         |    5 +-
 apps/doc-approval/cli-rust/README.md          |   61 +-
 apps/doc-approval/cli-rust/src/client.rs      |  181 +-
 .../cli-rust/src/commands/health.rs           |   19 +-
 .../cli-rust/src/commands/submit.rs           |  126 +-
 apps/doc-approval/cli-rust/src/lib.rs         |    4 +-
 .../cli-rust/tests/integration_tests.rs       |   38 +-
 .../doc-approval-core-rs/Cargo.toml           |   18 +
 .../doc-approval-core-rs/src/client.rs        |  250 +++
 .../doc-approval-core-rs/src/discovery.rs     |   53 +
 .../doc-approval-core-rs/src/lib.rs           |   20 +
 .../doc-approval-core-rs/src/sessions.rs      |   72 +
 .../doc-approval-core-rs/src/sse.rs           |  104 +
 .../doc-approval-core-rs/src/state.rs         |   88 +
 .../tests/client_tests.rs                     |  119 ++
 .../doc-approval-core-rs/tests/sse_tests.rs   |   26 +
 apps/doc-approval/linux-gtk/Cargo.toml        |    3 +-
 apps/doc-approval/linux-gtk/README.md         |   58 +-
 apps/doc-approval/linux-gtk/src/client.rs     |  198 +-
 apps/doc-approval/linux-gtk/src/lib.rs        |    4 +-
 .../linux-gtk/src/ui/main_window.rs           |  168 +-
 .../linux-gtk/tests/client_tests.rs           |   50 +-
 scripts/ci/repository_checks.sh               |    2 +
 28 files changed, 1509 insertions(+), 2479 deletions(-)
 rename apps/doc-approval/{linux-gtk => }/Cargo.lock (81%)
 create mode 100644 apps/doc-approval/Cargo.toml
 delete mode 100644 apps/doc-approval/cli-rust/Cargo.lock
 create mode 100644 apps/doc-approval/doc-approval-core-rs/Cargo.toml
 create mode 100644 apps/doc-approval/doc-approval-core-rs/src/client.rs
 create mode 100644 apps/doc-approval/doc-approval-core-rs/src/discovery.rs
 create mode 100644 apps/doc-approval/doc-approval-core-rs/src/lib.rs
 create mode 100644 apps/doc-approval/doc-approval-core-rs/src/sessions.rs
 create mode 100644 apps/doc-approval/doc-approval-core-rs/src/sse.rs
 create mode 100644 apps/doc-approval/doc-approval-core-rs/src/state.rs
 create mode 100644 apps/doc-approval/doc-approval-core-rs/tests/client_tests.rs
 create mode 100644 apps/doc-approval/doc-approval-core-rs/tests/sse_tests.rs

diff --git a/AGENTS.md b/AGENTS.md
index e66cf15..58e59bd 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -14,7 +14,7 @@ gh project item-list 2 --owner traverse-framework --format json --limit 300 \
 - **Phase 3 embedded runtime** ([#109](https://github.com/traverse-framework/reference-apps/issues/109)–[#118](https://github.com/traverse-framework/reference-apps/issues/118)) — see `docs/embedded-runtime-plan.md`; blocked on a **consumable platform embedder SDK** (Traverse [#553](https://github.com/traverse-framework/Traverse/issues/553) closed via [#578](https://github.com/traverse-framework/Traverse/pull/578) with manifest `execution_mode` only — no web/Swift/etc. embedder package yet). Traverse [#615](https://github.com/traverse-framework/Traverse/pull/615) added wasm32 core build only — not a platform embedder package.
 - **doc-approval multi-capability showcase** ([#111](https://github.com/traverse-framework/reference-apps/issues/111), [#112](https://github.com/traverse-framework/reference-apps/issues/112)) — blocked on Traverse [#538](https://github.com/traverse-framework/Traverse/issues/538) / [#555](https://github.com/traverse-framework/Traverse/issues/555) (`extract` / `recommend` agents)
 
-Ready: [#110](https://github.com/traverse-framework/reference-apps/issues/110) traverse-starter.pipeline (Traverse [#620](https://github.com/traverse-framework/Traverse/issues/620) closed); [#73](https://github.com/traverse-framework/reference-apps/issues/73) shared Rust client package ([#58](https://github.com/traverse-framework/reference-apps/issues/58)/[#59](https://github.com/traverse-framework/reference-apps/issues/59) Done; [#72](https://github.com/traverse-framework/reference-apps/issues/72) in this PR).
+Ready: [#110](https://github.com/traverse-framework/reference-apps/issues/110) traverse-starter.pipeline; [#73](https://github.com/traverse-framework/reference-apps/issues/73) doc-approval-core-rs ([#58](https://github.com/traverse-framework/reference-apps/issues/58)/[#59](https://github.com/traverse-framework/reference-apps/issues/59)/[#72](https://github.com/traverse-framework/reference-apps/issues/72) Done).
 
 Update this section when a PR changes platform status (see PR template checklist).
 
diff --git a/README.md b/README.md
index 1f4cf78..ead4d5d 100644
--- a/README.md
+++ b/README.md
@@ -175,4 +175,4 @@ Active blockers on [Project 2](https://github.com/orgs/traverse-framework/projec
 - **doc-approval multi-capability showcase** ([#111](https://github.com/traverse-framework/reference-apps/issues/111), [#112](https://github.com/traverse-framework/reference-apps/issues/112)) — blocked on Traverse [#538](https://github.com/traverse-framework/Traverse/issues/538) / [#555](https://github.com/traverse-framework/Traverse/issues/555) (`extract` / `recommend` agents).
 - **traverse-starter.pipeline showcase** ([#110](https://github.com/traverse-framework/reference-apps/issues/110)) — Ready (Traverse [#620](https://github.com/traverse-framework/Traverse/issues/620) closed; pipeline on Traverse `main`).
 
-Ready on Project 2: [#73](https://github.com/traverse-framework/reference-apps/issues/73)/[#110](https://github.com/traverse-framework/reference-apps/issues/110) — shared Rust client + pipeline showcase ([#58](https://github.com/traverse-framework/reference-apps/issues/58)/[#59](https://github.com/traverse-framework/reference-apps/issues/59) Done; [#72](https://github.com/traverse-framework/reference-apps/issues/72) in progress).
+Ready on Project 2: [#110](https://github.com/traverse-framework/reference-apps/issues/110) pipeline showcase ([#58](https://github.com/traverse-framework/reference-apps/issues/58)/[#59](https://github.com/traverse-framework/reference-apps/issues/59)/[#72](https://github.com/traverse-framework/reference-apps/issues/72) Done; [#73](https://github.com/traverse-framework/reference-apps/issues/73) in progress).
diff --git a/apps/doc-approval/linux-gtk/Cargo.lock b/apps/doc-approval/Cargo.lock
similarity index 81%
rename from apps/doc-approval/linux-gtk/Cargo.lock
rename to apps/doc-approval/Cargo.lock
index abe30a8..d62c2ed 100644
--- a/apps/doc-approval/linux-gtk/Cargo.lock
+++ b/apps/doc-approval/Cargo.lock
@@ -11,6 +11,56 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "anstream"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "824a212faf96e9acacdbd09febd34438f8f711fb84e09a8916013cd7815ca28d"
+dependencies = [
+ "anstyle",
+ "anstyle-parse",
+ "anstyle-query",
+ "anstyle-wincon",
+ "colorchoice",
+ "is_terminal_polyfill",
+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "940b3a0ca603d1eade50a4846a2afffd5ef57a9feac2c0e2ec2e14f9ead76000"
+
+[[package]]
+name = "anstyle-parse"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "52ce7f38b242319f7cabaa6813055467063ecdc9d355bbb4ce0c68908cd8130e"
+dependencies = [
+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle-query"
+version = "1.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "40c48f72fd53cd289104fc64099abca73db4166ad86ea0b4341abe65af83dadc"
+dependencies = [
+ "windows-sys 0.61.2",
+]
+
+[[package]]
+name = "anstyle-wincon"
+version = "3.0.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "291e6a250ff86cd4a820112fb8898808a366d8f9f58ce16d1f538353ad55747d"
+dependencies = [
+ "anstyle",
+ "once_cell_polyfill",
+ "windows-sys 0.61.2",
+]
+
 [[package]]
 name = "assert-json-diff"
 version = "2.0.2"
@@ -21,6 +71,21 @@ dependencies = [
  "serde_json",
 ]
 
+[[package]]
+name = "assert_cmd"
+version = "2.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2aa3a22042e45de04255c7bf3626e239f450200fd0493c1e382263544b20aea6"
+dependencies = [
+ "anstyle",
+ "bstr",
+ "libc",
+ "predicates",
+ "predicates-core",
+ "predicates-tree",
+ "wait-timeout",
+]
+
 [[package]]
 name = "atomic-waker"
 version = "1.1.2"
@@ -45,6 +110,17 @@ version = "2.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b4388bee8683e3d04af747c73422af53102d2bd24d9eadb6cbc100baef4b43f8"
 
+[[package]]
+name = "bstr"
+version = "1.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5cee35f73844aa3014bb606320a6c1f010249dbdf43342fe54b5a4f6a8ed4b79"
+dependencies = [
+ "memchr",
+ "regex-automata",
+ "serde_core",
+]
+
 [[package]]
 name = "bumpalo"
 version = "3.20.3"
@@ -53,9 +129,9 @@ checksum = "72f5acc6cb2ba439de613abc23857ec3d78374d8ed5ac84e9d11336e87da8649"
 
 [[package]]
 name = "bytes"
-version = "1.12.0"
+version = "1.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8ae3f5d315924270530207e2a68396c3cc547f6dca3fbdca317cfb1a51edb593"
+checksum = "fc652a48c352aef3ea3aed32080501cf3ef6ed5da78602a020c991775b0aff04"
 
 [[package]]
 name = "cairo-rs"
@@ -82,9 +158,9 @@ dependencies = [
 
 [[package]]
 name = "cc"
-version = "1.2.66"
+version = "1.2.67"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f5d6cac793997bd970000024b2934968efe83b382de4fdcf4fcb46b6ee4ad996"
+checksum = "e17dd265a7d0f31ef544e1b20e03add05d3b45b491b633b10d67145d2acc1a38"
 dependencies = [
  "find-msvc-tools",
  "shlex",
@@ -120,7 +196,72 @@ checksum = "d524456ba66e72eb8b115ff89e01e497f8e6d11d78b70b1aa13c0fbd97540a81"
 dependencies = [
  "cfg-if",
  "cpufeatures",
- "rand_core",
+ "rand_core 0.10.1",
+]
+
+[[package]]
+name = "clap"
+version = "4.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1ddb117e43bbf7dacf0a4190fef4d345b9bad68dfc649cb349e7d17d28428e51"
+dependencies = [
+ "clap_builder",
+ "clap_derive",
+]
+
+[[package]]
+name = "clap_builder"
+version = "4.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "714a53001bf66416adb0e2ef5ac857140e7dc3a0c48fb28b2f10762fc4b5069f"
+dependencies = [
+ "anstream",
+ "anstyle",
+ "clap_lex",
+ "strsim",
+]
+
+[[package]]
+name = "clap_derive"
+version = "4.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f2ce8604710f6733aa641a2b3731eaa1e8b3d9973d5e3565da11800813f997a9"
+dependencies = [
+ "heck",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "clap_lex"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c8d4a3bb8b1e0c1050499d1815f5ab16d04f0959b233085fb31653fbfc9d98f9"
+
+[[package]]
+name = "colorchoice"
+version = "1.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d07550c9036bf2ae0c684c4297d503f838287c83c53686d05370d0e139ae570"
+
+[[package]]
+name = "colored"
+version = "2.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "117725a109d387c937a1533ce01b450cbde6b88abceea8473c4d7a85853cda3c"
+dependencies = [
+ "lazy_static",
+ "windows-sys 0.59.0",
+]
+
+[[package]]
+name = "colored"
+version = "3.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "faf9468729b8cbcea668e36183cb69d317348c2e08e994829fb56ebfdfbaac34"
+dependencies = [
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -150,6 +291,12 @@ version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "092966b41edc516079bdf31ec78a2e0588d1d0c08f78b91d8307215928642b2b"
 
+[[package]]
+name = "difflib"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6184e33543162437515c2e2b48714794e37845ec9851711914eec9d308f6ebe8"
+
 [[package]]
 name = "directories"
 version = "5.0.1"
@@ -182,14 +329,43 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "doc-approval-cli"
+version = "0.1.0"
+dependencies = [
+ "assert_cmd",
+ "clap",
+ "colored 2.2.0",
+ "doc-approval-core-rs",
+ "futures-util",
+ "mockito",
+ "predicates",
+ "serde",
+ "serde_json",
+ "tokio",
+]
+
+[[package]]
+name = "doc-approval-core-rs"
+version = "0.1.0"
+dependencies = [
+ "futures-util",
+ "reqwest",
+ "serde",
+ "serde_json",
+ "tokio",
+ "wiremock",
+]
+
 [[package]]
 name = "doc-approval-gtk"
 version = "0.1.0"
 dependencies = [
  "directories",
+ "doc-approval-core-rs",
+ "futures-util",
  "gtk4",
  "libadwaita",
- "reqwest",
  "serde",
  "serde_json",
  "tokio",
@@ -218,6 +394,15 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5baebc0774151f905a1a2cc41989300b1e6fbb29aff0ceffa1064fdd3088d582"
 
+[[package]]
+name = "float-cmp"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b09cf3155332e944990140d967ff5eceb70df778b34f77d8075db46e4704e6d8"
+dependencies = [
+ "num-traits",
+]
+
 [[package]]
 name = "fnv"
 version = "1.0.7"
@@ -391,6 +576,18 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "getrandom"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "899def5c37c4fd7b2664648c28120ecec138e4d395b459e5ca34f9cce2dd77fd"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "r-efi 5.3.0",
+ "wasip2",
+]
+
 [[package]]
 name = "getrandom"
 version = "0.4.3"
@@ -400,8 +597,8 @@ dependencies = [
  "cfg-if",
  "js-sys",
  "libc",
- "r-efi",
- "rand_core",
+ "r-efi 6.0.0",
+ "rand_core 0.10.1",
  "wasm-bindgen",
 ]
 
@@ -858,6 +1055,12 @@ version = "2.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d98f6fed1fde3f8c21bc40a1abb88dd75e67924f9cffc3ef95607bad8017f8e2"
 
+[[package]]
+name = "is_terminal_polyfill"
+version = "1.70.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a6cb138bb79a146c1bd460005623e142ef0181e3d0219cb493e02f7d08a35695"
+
 [[package]]
 name = "itoa"
 version = "1.0.18"
@@ -933,6 +1136,15 @@ version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "92daf443525c4cce67b150400bc2316076100ce0b3686209eb8cf3c31612e6f0"
 
+[[package]]
+name = "lock_api"
+version = "0.4.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "224399e74b87b5f3557511d98dff8b14089b3dadafcab6bb93eab67d3aace965"
+dependencies = [
+ "scopeguard",
+]
+
 [[package]]
 name = "log"
 version = "0.4.33"
@@ -947,9 +1159,9 @@ checksum = "112b39cec0b298b6c1999fee3e31427f74f676e4cb9879ed1a121b43661a4154"
 
 [[package]]
 name = "memchr"
-version = "2.8.2"
+version = "2.8.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "88904434abc2901f197fe8cc55f0445e7ded921dba5911dad2e2b39b48e663c4"
+checksum = "cf8baf1c55e62ffcace7a9f06f4bd9cd3f0c4beb022d3b367256b91b87513d98"
 
 [[package]]
 name = "memoffset"
@@ -971,6 +1183,46 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "mockito"
+version = "1.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "90820618712cab19cfc46b274c6c22546a82affcb3c3bdf0f29e3db8e1bb92c0"
+dependencies = [
+ "assert-json-diff",
+ "bytes",
+ "colored 3.1.1",
+ "futures-core",
+ "http",
+ "http-body",
+ "http-body-util",
+ "hyper",
+ "hyper-util",
+ "log",
+ "pin-project-lite",
+ "rand 0.9.5",
+ "regex",
+ "serde_json",
+ "serde_urlencoded",
+ "similar",
+ "tokio",
+]
+
+[[package]]
+name = "normalize-line-endings"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "61807f77802ff30975e01f4f071c8ba10c022052f98b3294119f3e615d13e5be"
+
+[[package]]
+name = "num-traits"
+version = "0.2.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
+dependencies = [
+ "autocfg",
+]
+
 [[package]]
 name = "num_cpus"
 version = "1.17.0"
@@ -987,6 +1239,12 @@ version = "1.21.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9f7c3e4beb33f85d45ae3e3a1792185706c8e16d043238c593331cc7cd313b50"
 
+[[package]]
+name = "once_cell_polyfill"
+version = "1.70.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "384b8ab6d37215f3c5301a95a4accb5d64aa607f1fcb26a11b5303878451b4fe"
+
 [[package]]
 name = "option-ext"
 version = "0.2.0"
@@ -1017,6 +1275,29 @@ dependencies = [
  "system-deps",
 ]
 
+[[package]]
+name = "parking_lot"
+version = "0.12.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "93857453250e3077bd71ff98b6a65ea6621a19bb0f559a85248955ac12c45a1a"
+dependencies = [
+ "lock_api",
+ "parking_lot_core",
+]
+
+[[package]]
+name = "parking_lot_core"
+version = "0.9.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2621685985a2ebf1c516881c026032ac7deafcda1a2c9b7850dc81e3dfcb64c1"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "redox_syscall",
+ "smallvec",
+ "windows-link",
+]
+
 [[package]]
 name = "percent-encoding"
 version = "2.3.2"
@@ -1044,6 +1325,45 @@ dependencies = [
  "zerovec",
 ]
 
+[[package]]
+name = "ppv-lite86"
+version = "0.2.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85eae3c4ed2f50dcfe72643da4befc30deadb458a9b590d720cde2f2b1e97da9"
+dependencies = [
+ "zerocopy",
+]
+
+[[package]]
+name = "predicates"
+version = "3.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ada8f2932f28a27ee7b70dd6c1c39ea0675c55a36879ab92f3a715eaa1e63cfe"
+dependencies = [
+ "anstyle",
+ "difflib",
+ "float-cmp",
+ "normalize-line-endings",
+ "predicates-core",
+ "regex",
+]
+
+[[package]]
+name = "predicates-core"
+version = "1.0.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cad38746f3166b4031b1a0d39ad9f954dd291e7854fcc0eed52ee41a0b50d144"
+
+[[package]]
+name = "predicates-tree"
+version = "1.0.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d0de1b847b39c8131db0467e9df1ff60e6d0562ab8e9a16e568ad0fdb372e2f2"
+dependencies = [
+ "predicates-core",
+ "termtree",
+]
+
 [[package]]
 name = "proc-macro-crate"
 version = "3.5.0"
@@ -1091,7 +1411,7 @@ dependencies = [
  "bytes",
  "getrandom 0.4.3",
  "lru-slab",
- "rand",
+ "rand 0.10.2",
  "rand_pcg",
  "ring",
  "rustc-hash",
@@ -1127,12 +1447,28 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "r-efi"
+version = "5.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "69cdb34c158ceb288df11e18b4bd39de994f6657d83847bdffdbd7f346754b0f"
+
 [[package]]
 name = "r-efi"
 version = "6.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8dcc9c7d52a811697d2151c701e0d08956f92b0e24136cf4cf27b57a6a0d9bf"
 
+[[package]]
+name = "rand"
+version = "0.9.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b9ef1d0d795eb7d84685bca4f72f3649f064e6641543d3a8c415898726a57b41"
+dependencies = [
+ "rand_chacha",
+ "rand_core 0.9.5",
+]
+
 [[package]]
 name = "rand"
 version = "0.10.2"
@@ -1141,7 +1477,26 @@ checksum = "c7f5fa3a058cd35567ef9bfa5e75732bee0f9e4c55fa90477bef2dfcdbc4be80"
 dependencies = [
  "chacha20",
  "getrandom 0.4.3",
- "rand_core",
+ "rand_core 0.10.1",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3022b5f1df60f26e1ffddd6c66e8aa15de382ae63b3a0c1bfc0e4d3e3f325cb"
+dependencies = [
+ "ppv-lite86",
+ "rand_core 0.9.5",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.9.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "76afc826de14238e6e8c374ddcc1fa19e374fd8dd986b0d2af0d02377261d83c"
+dependencies = [
+ "getrandom 0.3.4",
 ]
 
 [[package]]
@@ -1156,7 +1511,16 @@ version = "0.10.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "caa0f4137e1c0a72f4c651489402276c8e8e1cf081f3b0ba156d2cbeef09e86a"
 dependencies = [
- "rand_core",
+ "rand_core 0.10.1",
+]
+
+[[package]]
+name = "redox_syscall"
+version = "0.5.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ed2bf2547551a7053d6fdfafda3f938979645c44812fbfcda098faae3f1a362d"
+dependencies = [
+ "bitflags",
 ]
 
 [[package]]
@@ -1172,9 +1536,9 @@ dependencies = [
 
 [[package]]
 name = "regex"
-version = "1.12.4"
+version = "1.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f1292b7759ae1cb9ec195452d1390a074f0cd8541ab7a5a8c31cd6db45d4a6ba"
+checksum = "2a0e75113e14dc5acb068cd0786884f214f1312650a3d36d269f5c4f3cdee8a2"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -1184,9 +1548,9 @@ dependencies = [
 
 [[package]]
 name = "regex-automata"
-version = "0.4.14"
+version = "0.4.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6e1dd4122fc1595e8162618945476892eefca7b88c52820e74af6262213cae8f"
+checksum = "1f388202e4b80542a0921078cc23b6333bcf1409c1e3f86404cae4766a6131db"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -1208,6 +1572,7 @@ dependencies = [
  "base64",
  "bytes",
  "futures-core",
+ "futures-util",
  "http",
  "http-body",
  "http-body-util",
@@ -1227,12 +1592,14 @@ dependencies = [
  "sync_wrapper",
  "tokio",
  "tokio-rustls",
+ "tokio-util",
  "tower",
  "tower-http",
  "tower-service",
  "url",
  "wasm-bindgen",
  "wasm-bindgen-futures",
+ "wasm-streams",
  "web-sys",
  "webpki-roots",
 ]
@@ -1303,9 +1670,9 @@ dependencies = [
 
 [[package]]
 name = "rustversion"
-version = "1.0.22"
+version = "1.0.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b39cdef0fa800fc44525c84ccb54a029961a8215f9619753635a9c0d2538d46d"
+checksum = "cf54715a573b99ac80df0bc206da022bcd442c974952c7b9720069370852e21f"
 
 [[package]]
 name = "ryu"
@@ -1313,6 +1680,12 @@ version = "1.0.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9774ba4a74de5f7b1c1451ed6cd5285a32eddb5cccb8cc655a4e50009e06477f"
 
+[[package]]
+name = "scopeguard"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
+
 [[package]]
 name = "semver"
 version = "1.0.28"
@@ -1389,6 +1762,12 @@ version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8fadd59c855ef2080decdef8ff161eb6661b86933c9d82e5ba29dc602a55aba"
 
+[[package]]
+name = "similar"
+version = "2.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bbbb5d9659141646ae647b42fe094daf6c6192d1620870b449d9557f748b2daa"
+
 [[package]]
 name = "slab"
 version = "0.4.12"
@@ -1417,6 +1796,12 @@ version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6ce2be8dc25455e1f91df71bfa12ad37d7af1092ae736f3a6cd0e37bc7810596"
 
+[[package]]
+name = "strsim"
+version = "0.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
+
 [[package]]
 name = "subtle"
 version = "2.6.1"
@@ -1473,6 +1858,12 @@ version = "0.13.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "adb6935a6f5c20170eeceb1a3835a49e12e19d792f6dd344ccc76a985ca5a6ca"
 
+[[package]]
+name = "termtree"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f50febec83f5ee1df3015341d8bd429f2d1cc62bcba7ea2076759d315084683"
+
 [[package]]
 name = "thiserror"
 version = "1.0.69"
@@ -1525,9 +1916,9 @@ dependencies = [
 
 [[package]]
 name = "tinyvec"
-version = "1.11.0"
+version = "1.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3e61e67053d25a4e82c844e8424039d9745781b3fc4f32b8d55ed50f5f667ef3"
+checksum = "bb4ebadaa0af04fab11ae01eb5f9fdb5f9c5b875506e210e71c07873528baa7f"
 dependencies = [
  "tinyvec_macros",
 ]
@@ -1547,6 +1938,7 @@ dependencies = [
  "bytes",
  "libc",
  "mio",
+ "parking_lot",
  "pin-project-lite",
  "socket2",
  "tokio-macros",
@@ -1738,12 +2130,27 @@ version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b6c140620e7ffbb22c2dee59cafe6084a59b5ffc27a8859a5f0d494b5d52b6be"
 
+[[package]]
+name = "utf8parse"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"
+
 [[package]]
 name = "version-compare"
 version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "03c2856837ef78f57382f06b2b8563a2f512f7185d732608fd9176cb3b8edf0e"
 
+[[package]]
+name = "wait-timeout"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09ac3b126d3914f9849036f826e054cbabdc8519970b8998ddaf3b5bd3c65f11"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "want"
 version = "0.3.1"
@@ -1759,6 +2166,15 @@ version = "0.11.1+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ccf3ec651a847eb01de73ccad15eb7d99f80485de043efb2f370cd654f4ea44b"
 
+[[package]]
+name = "wasip2"
+version = "1.0.4+wasi-0.2.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b67efb37e106e55ce722a510d6b5f9c17f083e5fc79afc2badeb12cc313d9487"
+dependencies = [
+ "wit-bindgen",
+]
+
 [[package]]
 name = "wasm-bindgen"
 version = "0.2.126"
@@ -1814,6 +2230,19 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "wasm-streams"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "15053d8d85c7eccdbefef60f06769760a563c7f0a9d6902a13d35c7800b0ad65"
+dependencies = [
+ "futures-util",
+ "js-sys",
+ "wasm-bindgen",
+ "wasm-bindgen-futures",
+ "web-sys",
+]
+
 [[package]]
 name = "web-sys"
 version = "0.3.103"
@@ -2038,6 +2467,12 @@ dependencies = [
  "url",
 ]
 
+[[package]]
+name = "wit-bindgen"
+version = "0.57.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1ebf944e87a7c253233ad6766e082e3cd714b5d03812acc24c318f549614536e"
+
 [[package]]
 name = "writeable"
 version = "0.6.3"
@@ -2067,6 +2502,26 @@ dependencies = [
  "synstructure",
 ]
 
+[[package]]
+name = "zerocopy"
+version = "0.8.54"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b7cbbc0a705a0fd05cc3676525980d2bf5a9bc4adac6d6475209a7887cf59d19"
+dependencies = [
+ "zerocopy-derive",
+]
+
+[[package]]
+name = "zerocopy-derive"
+version = "0.8.54"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2e817b7b52d0c7358d3246da9d69935ebb18116b2b102b4230dac079b4862f5"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "zerofrom"
 version = "0.1.8"
diff --git a/apps/doc-approval/Cargo.toml b/apps/doc-approval/Cargo.toml
new file mode 100644
index 0000000..5ec1e73
--- /dev/null
+++ b/apps/doc-approval/Cargo.toml
@@ -0,0 +1,3 @@
+[workspace]
+resolver = "2"
+members = ["doc-approval-core-rs", "linux-gtk", "cli-rust"]
diff --git a/apps/doc-approval/cli-rust/Cargo.lock b/apps/doc-approval/cli-rust/Cargo.lock
deleted file mode 100644
index 6fa8bad..0000000
--- a/apps/doc-approval/cli-rust/Cargo.lock
+++ /dev/null
@@ -1,1817 +0,0 @@
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diff --git a/apps/doc-approval/cli-rust/Cargo.toml b/apps/doc-approval/cli-rust/Cargo.toml
index 0eacf76..4820b94 100644
--- a/apps/doc-approval/cli-rust/Cargo.toml
+++ b/apps/doc-approval/cli-rust/Cargo.toml
@@ -10,9 +10,11 @@ name = "doc-approval"
 path = "src/main.rs"
 
 [dependencies]
+doc-approval-core-rs = { path = "../doc-approval-core-rs" }
 clap = { version = "4", features = ["derive", "env"] }
 colored = "2"
-reqwest = { version = "0.12", default-features = false, features = ["json", "blocking", "rustls-tls"] }
+futures-util = "0.3"
+tokio = { version = "1", features = ["rt-multi-thread", "macros"] }
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 
@@ -20,3 +22,4 @@ serde_json = "1"
 mockito = "1"
 assert_cmd = "2"
 predicates = "3"
+tokio = { version = "1", features = ["rt-multi-thread", "macros"] }
diff --git a/apps/doc-approval/cli-rust/README.md b/apps/doc-approval/cli-rust/README.md
index 4a716f7..c8248f1 100644
--- a/apps/doc-approval/cli-rust/README.md
+++ b/apps/doc-approval/cli-rust/README.md
@@ -1,61 +1,10 @@
 # doc-approval (Rust CLI)
 
-Terminal client for the `doc-approval` reference app. Phase 1 uses HTTP polling against the public Traverse HTTP/JSON API (spec 033) — same flow as `web-react` and the native GUI clients.
-
-## Prerequisites
-
-- **Rust 1.78+** via [rustup](https://rustup.rs/)
-- **Traverse runtime** running locally:
-
-```bash
-git clone https://github.com/traverse-framework/Traverse.git /tmp/traverse
-cd /tmp/traverse && git checkout v0.6.0
-cargo run -p traverse-cli -- serve
-```
-
-## Build and install
+Terminal client for the `doc-approval` reference app. Uses shared `doc-approval-core-rs` for HTTP command dispatch and SSE app-state events.
 
 ```bash
-cd apps/doc-approval/cli-rust
-cargo build --release
-cargo test
-cargo install --path .   # installs `doc-approval` binary to ~/.cargo/bin
+cd apps/doc-approval
+cargo build -p doc-approval-cli --release
+cargo test -p doc-approval-cli -p doc-approval-core-rs
+cargo install --path cli-rust
 ```
-
-## Usage
-
-```bash
-# Human-readable output
-doc-approval submit --file contract.txt
-doc-approval submit --text "Agreement between..."
-
-# Machine-readable JSON
-doc-approval submit --file contract.txt --json
-
-# Health check
-doc-approval health
-doc-approval health --json
-
-# Override runtime URL and workspace
-doc-approval submit --base-url http://192.168.1.42:8787 --workspace my-workspace --text "..."
-```
-
-Environment variables:
-
-| Variable | Default |
-|---|---|
-| `TRAVERSE_BASE_URL` | `http://127.0.0.1:8787` |
-| `TRAVERSE_WORKSPACE` | `local-default` |
-
-## Architecture
-
-| File | Role |
-|---|---|
-| `client.rs` | Blocking `reqwest` HTTP client |
-| `commands/submit.rs` | Execute + poll loop |
-| `commands/health.rs` | `/healthz` check |
-| `output.rs` | Human (colored) and JSON formatters |
-
-## Phase 2 (not implemented)
-
-SSE streaming and `doc-approval queue` when Traverse ships [#525](https://github.com/traverse-framework/Traverse/issues/525)–[#527](https://github.com/traverse-framework/Traverse/issues/527).
diff --git a/apps/doc-approval/cli-rust/src/client.rs b/apps/doc-approval/cli-rust/src/client.rs
index 8978eee..97f3704 100644
--- a/apps/doc-approval/cli-rust/src/client.rs
+++ b/apps/doc-approval/cli-rust/src/client.rs
@@ -1,176 +1,5 @@
-use serde::{Deserialize, Serialize};
-use serde_json::Value;
-
-#[derive(Debug, Clone, PartialEq, Deserialize, Serialize)]
-pub struct DocApprovalOutput {
-    #[serde(rename = "docType")]
-    pub doc_type: String,
-    pub parties: Vec<String>,
-    pub amounts: Vec<String>,
-    pub confidence: f64,
-    pub recommendation: String,
-}
-
-#[derive(Debug, Clone, PartialEq, Deserialize, Serialize)]
-pub struct TraceEvent {
-    pub event_type: String,
-    pub timestamp: String,
-    pub data: Option<Value>,
-}
-
-#[derive(Debug, Clone, PartialEq)]
-pub struct ExecutionPollResult {
-    pub execution_id: String,
-    pub status: String,
-    pub output: Option<DocApprovalOutput>,
-    pub error: Option<String>,
-}
-
-#[derive(Debug, PartialEq, Eq)]
-pub enum TraverseClientError {
-    Http(u16),
-    Decode,
-    Request(String),
-}
-
-impl std::fmt::Display for TraverseClientError {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        match self {
-            Self::Http(code) => write!(f, "HTTP {code}"),
-            Self::Decode => write!(f, "decode failed"),
-            Self::Request(msg) => write!(f, "request failed: {msg}"),
-        }
-    }
-}
-
-impl std::error::Error for TraverseClientError {}
-
-pub struct TraverseClient {
-    http: reqwest::blocking::Client,
-}
-
-impl Default for TraverseClient {
-    fn default() -> Self {
-        Self::new()
-    }
-}
-
-impl TraverseClient {
-    pub fn new() -> Self {
-        Self {
-            http: reqwest::blocking::Client::new(),
-        }
-    }
-
-    pub fn with_client(http: reqwest::blocking::Client) -> Self {
-        Self { http }
-    }
-
-    pub fn check_health(&self, base_url: &str) -> Result<bool, TraverseClientError> {
-        let url = format!("{}/healthz", normalize_base_url(base_url));
-        let response = self
-            .http
-            .get(url)
-            .send()
-            .map_err(|e| TraverseClientError::Request(e.to_string()))?;
-        Ok(response.status().is_success())
-    }
-
-    pub fn execute(
-        &self,
-        base_url: &str,
-        workspace_id: &str,
-        capability: &str,
-        input: &Value,
-    ) -> Result<String, TraverseClientError> {
-        let url = format!(
-            "{}/v1/workspaces/{}/execute",
-            normalize_base_url(base_url),
-            workspace_id
-        );
-        let body = serde_json::json!({ "capability": capability, "input": input });
-        let response = self
-            .http
-            .post(url)
-            .json(&body)
-            .send()
-            .map_err(|e| TraverseClientError::Request(e.to_string()))?;
-        if !response.status().is_success() {
-            return Err(TraverseClientError::Http(response.status().as_u16()));
-        }
-        let payload: ExecuteResponse = response
-            .json()
-            .map_err(|_| TraverseClientError::Decode)?;
-        Ok(payload.execution_id)
-    }
-
-    pub fn poll_execution(
-        &self,
-        base_url: &str,
-        workspace_id: &str,
-        execution_id: &str,
-    ) -> Result<ExecutionPollResult, TraverseClientError> {
-        let url = format!(
-            "{}/v1/workspaces/{}/executions/{}",
-            normalize_base_url(base_url),
-            workspace_id,
-            execution_id
-        );
-        let response = self
-            .http
-            .get(url)
-            .send()
-            .map_err(|e| TraverseClientError::Request(e.to_string()))?;
-        if !response.status().is_success() {
-            return Err(TraverseClientError::Http(response.status().as_u16()));
-        }
-        let payload: ExecutionPollResponse = response
-            .json()
-            .map_err(|_| TraverseClientError::Decode)?;
-        Ok(ExecutionPollResult {
-            execution_id: execution_id.to_string(),
-            status: payload.status,
-            output: payload.output,
-            error: payload.error,
-        })
-    }
-
-    pub fn fetch_trace(
-        &self,
-        base_url: &str,
-        workspace_id: &str,
-        execution_id: &str,
-    ) -> Result<Vec<TraceEvent>, TraverseClientError> {
-        let url = format!(
-            "{}/v1/workspaces/{}/traces/{}",
-            normalize_base_url(base_url),
-            workspace_id,
-            execution_id
-        );
-        let response = self
-            .http
-            .get(url)
-            .send()
-            .map_err(|e| TraverseClientError::Request(e.to_string()))?;
-        if !response.status().is_success() {
-            return Err(TraverseClientError::Http(response.status().as_u16()));
-        }
-        response.json().map_err(|_| TraverseClientError::Decode)
-    }
-}
-
-fn normalize_base_url(base_url: &str) -> String {
-    base_url.trim().trim_end_matches('/').to_string()
-}
-
-#[derive(Debug, Deserialize)]
-struct ExecuteResponse {
-    execution_id: String,
-}
-
-#[derive(Debug, Deserialize)]
-struct ExecutionPollResponse {
-    status: String,
-    output: Option<DocApprovalOutput>,
-    error: Option<String>,
-}
+//! Re-exports the shared doc-approval-core-rs client for the CLI shell.
+pub use doc_approval_core_rs::{
+    DocApprovalClient as TraverseClient, DocApprovalClientError as TraverseClientError,
+    DocApprovalOutput, TraceEvent, DEFAULT_APP_ID,
+};
diff --git a/apps/doc-approval/cli-rust/src/commands/health.rs b/apps/doc-approval/cli-rust/src/commands/health.rs
index ede1ae1..0f369bd 100644
--- a/apps/doc-approval/cli-rust/src/commands/health.rs
+++ b/apps/doc-approval/cli-rust/src/commands/health.rs
@@ -2,8 +2,21 @@ use crate::client::TraverseClient;
 use crate::output::print_health;
 
 pub fn execute(base_url: &str, json: bool) -> i32 {
-    let client = TraverseClient::new();
-    let online = client.check_health(base_url).unwrap_or(false);
+    let runtime = match tokio::runtime::Runtime::new() {
+        Ok(rt) => rt,
+        Err(err) => {
+            eprintln!("runtime failed: {err}");
+            return 1;
+        }
+    };
+    let online = runtime.block_on(async {
+        let client = TraverseClient::new();
+        client.check_health(base_url).await.unwrap_or(false)
+    });
     print_health(base_url, online, json);
-    if online { 0 } else { 1 }
+    if online {
+        0
+    } else {
+        1
+    }
 }
diff --git a/apps/doc-approval/cli-rust/src/commands/submit.rs b/apps/doc-approval/cli-rust/src/commands/submit.rs
index 73fed61..c7e931c 100644
--- a/apps/doc-approval/cli-rust/src/commands/submit.rs
+++ b/apps/doc-approval/cli-rust/src/commands/submit.rs
@@ -1,59 +1,101 @@
-use std::{thread, time::Duration};
+use futures_util::StreamExt;
+use doc_approval_core_rs::{AppState, DEFAULT_APP_ID};
 
 use crate::client::{DocApprovalOutput, TraverseClient};
 use crate::output::{print_submit_result, SubmitResultJson};
-use crate::CAPABILITY_ID;
 
 pub fn execute(base_url: &str, workspace: &str, document: &str, json: bool) -> i32 {
-    let client = TraverseClient::new();
-    let execution_id = match client.execute(
-        base_url,
-        workspace,
-        CAPABILITY_ID,
-        &serde_json::json!({ "document": document }),
-    ) {
-        Ok(id) => id,
+    let runtime = match tokio::runtime::Runtime::new() {
+        Ok(rt) => rt,
         Err(err) => {
-            eprintln!("execute failed: {err}");
+            eprintln!("runtime failed: {err}");
             return 1;
         }
     };
 
-    loop {
-        match client.poll_execution(base_url, workspace, &execution_id) {
-            Ok(result) if result.status == "succeeded" => {
-                let trace = client
-                    .fetch_trace(base_url, workspace, &execution_id)
-                    .unwrap_or_default();
-                let output = result.output.unwrap_or(DocApprovalOutput {
-                    doc_type: String::new(),
-                    parties: vec![],
-                    amounts: vec![],
-                    confidence: 0.0,
-                    recommendation: String::new(),
-                });
-                print_submit_result(
-                    &SubmitResultJson {
-                        execution_id,
-                        output,
-                        trace,
-                    },
-                    json,
-                );
-                return 0;
-            }
-            Ok(result) if result.status == "failed" => {
-                eprintln!(
-                    "execution failed: {}",
-                    result.error.unwrap_or_else(|| "unknown error".to_string())
-                );
+    runtime.block_on(async {
+        let client = TraverseClient::new();
+        let accepted = match client.submit_document(base_url, workspace, document).await {
+            Ok(accepted) => accepted,
+            Err(err) => {
+                eprintln!("submit failed: {err}");
                 return 1;
             }
-            Ok(_) => thread::sleep(Duration::from_secs(1)),
+        };
+
+        let mut stream = match client
+            .subscribe_events(base_url, workspace, DEFAULT_APP_ID)
+            .await
+        {
+            Ok(stream) => stream,
             Err(err) => {
-                eprintln!("poll failed: {err}");
+                eprintln!("subscribe failed: {err}");
                 return 1;
             }
+        };
+
+        while let Some(item) = stream.next().await {
+            match item {
+                Ok(event) if event.event_type == "heartbeat" => continue,
+                Ok(event) => {
+                    if let Some(sid) = event.session_id.as_deref() {
+                        if sid != accepted.session_id {
+                            continue;
+                        }
+                    }
+                    if event.event_type == "error"
+                        || matches!(event.state.as_ref(), Some(AppState::Error))
+                    {
+                        eprintln!(
+                            "execution failed: {}",
+                            event
+                                .error_message
+                                .unwrap_or_else(|| "unknown error".to_string())
+                        );
+                        return 1;
+                    }
+                    let terminal = matches!(event.state.as_ref(), Some(AppState::Results))
+                        || event.event_type == "capability_result";
+                    if !terminal {
+                        continue;
+                    }
+                    let execution_id = event
+                        .execution_id
+                        .or(accepted.execution_id.clone())
+                        .unwrap_or_default();
+                    let output = event.output.unwrap_or(DocApprovalOutput {
+                        doc_type: String::new(),
+                        parties: vec![],
+                        amounts: vec![],
+                        confidence: 0.0,
+                        recommendation: String::new(),
+                    });
+                    let trace = if execution_id.is_empty() {
+                        Vec::new()
+                    } else {
+                        client
+                            .fetch_trace(base_url, workspace, &execution_id)
+                            .await
+                            .unwrap_or_default()
+                    };
+                    print_submit_result(
+                        &SubmitResultJson {
+                            execution_id,
+                            output,
+                            trace,
+                        },
+                        json,
+                    );
+                    return 0;
+                }
+                Err(err) => {
+                    eprintln!("event stream failed: {err}");
+                    return 1;
+                }
+            }
         }
-    }
+
+        eprintln!("event stream ended before result");
+        1
+    })
 }
diff --git a/apps/doc-approval/cli-rust/src/lib.rs b/apps/doc-approval/cli-rust/src/lib.rs
index 9227c29..fb013c5 100644
--- a/apps/doc-approval/cli-rust/src/lib.rs
+++ b/apps/doc-approval/cli-rust/src/lib.rs
@@ -2,6 +2,4 @@ pub mod client;
 pub mod commands;
 pub mod output;
 
-pub const CAPABILITY_ID: &str = "doc-approval.analyze";
-pub const DEFAULT_BASE_URL: &str = "http://127.0.0.1:8787";
-pub const DEFAULT_WORKSPACE: &str = "local-default";
+pub use doc_approval_core_rs::{DEFAULT_APP_ID, DEFAULT_BASE_URL, DEFAULT_WORKSPACE};
diff --git a/apps/doc-approval/cli-rust/tests/integration_tests.rs b/apps/doc-approval/cli-rust/tests/integration_tests.rs
index 05f7486..20f80af 100644
--- a/apps/doc-approval/cli-rust/tests/integration_tests.rs
+++ b/apps/doc-approval/cli-rust/tests/integration_tests.rs
@@ -1,34 +1,44 @@
 use doc_approval_cli::client::TraverseClient;
 use doc_approval_cli::commands;
 
-#[test]
-fn check_health_returns_true_on_200() {
-    let mut server = mockito::Server::new();
+#[tokio::test]
+async fn check_health_returns_true_on_200() {
+    let mut server = mockito::Server::new_async().await;
     let _mock = server
         .mock("GET", "/healthz")
         .with_status(200)
-        .create();
+        .create_async()
+        .await;
 
     let client = TraverseClient::new();
-    assert!(client.check_health(&server.url()).unwrap());
+    assert!(client.check_health(&server.url()).await.unwrap());
 }
 
 #[test]
 fn submit_flow_succeeds_against_mock_server() {
     let mut server = mockito::Server::new();
 
-    let _execute = server
-        .mock("POST", "/v1/workspaces/local-default/execute")
-        .with_status(200)
-        .with_body(r#"{"execution_id":"exec_abc"}"#)
+    let _submit = server
+        .mock(
+            "POST",
+            "/v1/workspaces/local-default/apps/doc-approval/commands",
+        )
+        .with_status(202)
+        .with_header("content-type", "application/json")
+        .with_body(
+            r#"{"api_version":"v1","status":"accepted","workspace_id":"local-default","app_id":"doc-approval","session_id":"sess-1","command":"submit","state":"processing","execution_id":"exec_abc"}"#,
+        )
         .create();
 
-    let _poll = server
-        .mock("GET", "/v1/workspaces/local-default/executions/exec_abc")
-        .with_status(200)
-        .with_body(
-            r#"{"status":"succeeded","output":{"docType":"invoice","parties":["A"],"amounts":["$100"],"confidence":0.9,"recommendation":"approve"}}"#,
+    let sse_body = "event: capability_result\ndata: {\"state\":\"results\",\"session_id\":\"sess-1\",\"execution_id\":\"exec_abc\",\"output\":{\"docType\":\"nda\",\"parties\":[\"A\"],\"amounts\":[],\"confidence\":0.9,\"recommendation\":\"approve\"}}\n\n";
+    let _events = server
+        .mock(
+            "GET",
+            "/v1/workspaces/local-default/apps/doc-approval/events",
         )
+        .with_status(200)
+        .with_header("content-type", "text/event-stream")
+        .with_body(sse_body)
         .create();
 
     let _trace = server
diff --git a/apps/doc-approval/doc-approval-core-rs/Cargo.toml b/apps/doc-approval/doc-approval-core-rs/Cargo.toml
new file mode 100644
index 0000000..f4dc683
--- /dev/null
+++ b/apps/doc-approval/doc-approval-core-rs/Cargo.toml
@@ -0,0 +1,18 @@
+[package]
+name = "doc-approval-core-rs"
+version = "0.1.0"
+edition = "2021"
+description = "Shared Traverse HTTP/SSE client for doc-approval Rust shells"
+license = "MIT"
+
+[dependencies]
+reqwest = { version = "0.12", default-features = false, features = ["json", "rustls-tls", "stream"] }
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+futures-util = "0.3"
+tokio = { version = "1", features = ["rt", "macros", "time"] }
+
+[dev-dependencies]
+tokio = { version = "1", features = ["rt-multi-thread", "macros"] }
+wiremock = "0.6"
+serde_json = "1"
diff --git a/apps/doc-approval/doc-approval-core-rs/src/client.rs b/apps/doc-approval/doc-approval-core-rs/src/client.rs
new file mode 100644
index 0000000..f384524
--- /dev/null
+++ b/apps/doc-approval/doc-approval-core-rs/src/client.rs
@@ -0,0 +1,250 @@
+use serde::{Deserialize, Serialize};
+use serde_json::{json, Value};
+
+use crate::sse;
+use crate::state::StateEvent;
+use crate::{list_sessions, SessionSummary, DEFAULT_APP_ID};
+
+#[derive(Debug, Clone, PartialEq, Deserialize, Serialize)]
+pub struct DocApprovalOutput {
+    #[serde(rename = "docType")]
+    pub doc_type: String,
+    pub parties: Vec<String>,
+    pub amounts: Vec<String>,
+    pub confidence: f64,
+    pub recommendation: String,
+}
+
+#[derive(Debug, Clone, PartialEq, Deserialize, Serialize)]
+pub struct TraceEvent {
+    pub event_type: String,
+    pub timestamp: String,
+    pub data: Option<Value>,
+}
+
+#[derive(Debug, Clone, PartialEq)]
+pub struct CommandAccepted {
+    pub api_version: String,
+    pub status: String,
+    pub workspace_id: String,
+    pub app_id: String,
+    pub session_id: String,
+    pub command: String,
+    pub state: String,
+    pub execution_id: Option<String>,
+}
+
+#[derive(Debug, PartialEq, Eq)]
+pub enum DocApprovalClientError {
+    Http(u16),
+    Decode,
+    Request(String),
+}
+
+impl std::fmt::Display for DocApprovalClientError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::Http(code) => write!(f, "HTTP {code}"),
+            Self::Decode => write!(f, "decode failed"),
+            Self::Request(msg) => write!(f, "request failed: {msg}"),
+        }
+    }
+}
+
+impl std::error::Error for DocApprovalClientError {}
+
+#[derive(Clone)]
+pub struct DocApprovalClient {
+    http: reqwest::Client,
+}
+
+impl Default for DocApprovalClient {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl DocApprovalClient {
+    pub fn new() -> Self {
+        Self {
+            http: reqwest::Client::new(),
+        }
+    }
+
+    pub fn with_client(http: reqwest::Client) -> Self {
+        Self { http }
+    }
+
+    pub async fn health_check(&self, base_url: &str) -> Result<bool, DocApprovalClientError> {
+        let url = format!("{}/healthz", normalize_base_url(base_url));
+        let response = self
+            .http
+            .get(url)
+            .send()
+            .await
+            .map_err(|e| DocApprovalClientError::Request(e.to_string()))?;
+        Ok(response.status().is_success())
+    }
+
+    pub async fn check_health(&self, base_url: &str) -> Result<bool, DocApprovalClientError> {
+        self.health_check(base_url).await
+    }
+
+    pub async fn send_command(
+        &self,
+        base_url: &str,
+        workspace_id: &str,
+        app_id: &str,
+        command: &str,
+        payload: &Value,
+        session_id: Option<&str>,
+    ) -> Result<CommandAccepted, DocApprovalClientError> {
+        let url = format!(
+            "{}/v1/workspaces/{}/apps/{}/commands",
+            normalize_base_url(base_url),
+            workspace_id,
+            app_id
+        );
+        let mut body = json!({
+            "command": command,
+            "payload": payload,
+        });
+        if let Some(session_id) = session_id {
+            body["session_id"] = Value::String(session_id.to_string());
+        }
+        let response = self
+            .http
+            .post(url)
+            .json(&body)
+            .send()
+            .await
+            .map_err(|e| DocApprovalClientError::Request(e.to_string()))?;
+        if !(200..300).contains(&response.status().as_u16()) {
+            return Err(DocApprovalClientError::Http(response.status().as_u16()));
+        }
+        let payload: CommandAcceptedResponse = response
+            .json()
+            .await
+            .map_err(|_| DocApprovalClientError::Decode)?;
+        Ok(CommandAccepted {
+            api_version: payload.api_version,
+            status: payload.status,
+            workspace_id: payload.workspace_id,
+            app_id: payload.app_id,
+            session_id: payload.session_id,
+            command: payload.command,
+            state: payload.state,
+            execution_id: payload.execution_id,
+        })
+    }
+
+    /// Session-scoped command dispatch (issue DoD).
+    pub async fn send_command_for_session(
+        &self,
+        base_url: &str,
+        workspace_id: &str,
+        session_id: &str,
+        command: &str,
+        payload: &Value,
+    ) -> Result<CommandAccepted, DocApprovalClientError> {
+        self.send_command(
+            base_url,
+            workspace_id,
+            DEFAULT_APP_ID,
+            command,
+            payload,
+            Some(session_id),
+        )
+        .await
+    }
+
+    pub async fn submit_document(
+        &self,
+        base_url: &str,
+        workspace_id: &str,
+        document: &str,
+    ) -> Result<CommandAccepted, DocApprovalClientError> {
+        self.send_command(
+            base_url,
+            workspace_id,
+            DEFAULT_APP_ID,
+            "submit",
+            &json!({ "document": document }),
+            None,
+        )
+        .await
+    }
+
+    pub async fn list_sessions(
+        &self,
+        base_url: &str,
+        workspace_id: &str,
+        state: Option<&str>,
+    ) -> Result<Vec<SessionSummary>, DocApprovalClientError> {
+        list_sessions(&self.http, base_url, workspace_id, DEFAULT_APP_ID, state).await
+    }
+
+    pub async fn fetch_trace(
+        &self,
+        base_url: &str,
+        workspace_id: &str,
+        execution_id: &str,
+    ) -> Result<Vec<TraceEvent>, DocApprovalClientError> {
+        let url = format!(
+            "{}/v1/workspaces/{}/traces/{}",
+            normalize_base_url(base_url),
+            workspace_id,
+            execution_id
+        );
+        let response = self
+            .http
+            .get(url)
+            .send()
+            .await
+            .map_err(|e| DocApprovalClientError::Request(e.to_string()))?;
+        if !response.status().is_success() {
+            return Err(DocApprovalClientError::Http(response.status().as_u16()));
+        }
+        response
+            .json()
+            .await
+            .map_err(|_| DocApprovalClientError::Decode)
+    }
+
+    pub fn app_events_url(base_url: &str, workspace_id: &str, app_id: &str) -> String {
+        format!(
+            "{}/v1/workspaces/{}/apps/{}/events",
+            normalize_base_url(base_url),
+            workspace_id,
+            app_id
+        )
+    }
+
+    pub async fn subscribe_events(
+        &self,
+        base_url: &str,
+        workspace_id: &str,
+        app_id: &str,
+    ) -> Result<
+        impl futures_util::Stream<Item = Result<StateEvent, DocApprovalClientError>>,
+        DocApprovalClientError,
+    > {
+        sse::subscribe_events(&self.http, base_url, workspace_id, app_id).await
+    }
+}
+
+pub fn normalize_base_url(base_url: &str) -> String {
+    base_url.trim().trim_end_matches('/').to_string()
+}
+
+#[derive(Debug, Deserialize)]
+struct CommandAcceptedResponse {
+    api_version: String,
+    status: String,
+    workspace_id: String,
+    app_id: String,
+    session_id: String,
+    command: String,
+    state: String,
+    execution_id: Option<String>,
+}
diff --git a/apps/doc-approval/doc-approval-core-rs/src/discovery.rs b/apps/doc-approval/doc-approval-core-rs/src/discovery.rs
new file mode 100644
index 0000000..41f0fd0
--- /dev/null
+++ b/apps/doc-approval/doc-approval-core-rs/src/discovery.rs
@@ -0,0 +1,53 @@
+use serde::Deserialize;
+use std::fs;
+use std::path::{Path, PathBuf};
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct ServerInfo {
+    pub base_url: String,
+    pub workspace_default: String,
+}
+
+#[derive(Debug, Deserialize)]
+struct ServerJson {
+    base_url: String,
+    #[serde(default = "default_workspace")]
+    workspace_default: String,
+}
+
+fn default_workspace() -> String {
+    "local-default".to_string()
+}
+
+pub struct ServerDiscovery;
+
+impl ServerDiscovery {
+    pub fn from_file(path: impl AsRef<Path>) -> Option<ServerInfo> {
+        let data = fs::read_to_string(path).ok()?;
+        let parsed: ServerJson = serde_json::from_str(&data).ok()?;
+        Some(ServerInfo {
+            base_url: parsed.base_url,
+            workspace_default: parsed.workspace_default,
+        })
+    }
+
+    /// Walk parents from `start` looking for `.traverse/server.json`.
+    pub fn discover(start: impl AsRef<Path>) -> Option<ServerInfo> {
+        let mut current = start.as_ref().to_path_buf();
+        for _ in 0..8 {
+            let candidate = current.join(".traverse").join("server.json");
+            if let Some(info) = Self::from_file(&candidate) {
+                return Some(info);
+            }
+            if !current.pop() {
+                break;
+            }
+        }
+        None
+    }
+
+    pub fn discover_cwd() -> Option<ServerInfo> {
+        let cwd = std::env::current_dir().unwrap_or_else(|_| PathBuf::from("."));
+        Self::discover(cwd)
+    }
+}
diff --git a/apps/doc-approval/doc-approval-core-rs/src/lib.rs b/apps/doc-approval/doc-approval-core-rs/src/lib.rs
new file mode 100644
index 0000000..0ffcb97
--- /dev/null
+++ b/apps/doc-approval/doc-approval-core-rs/src/lib.rs
@@ -0,0 +1,20 @@
+//! Shared Traverse runtime client for doc-approval Rust shells.
+//! Platform-neutral: no GTK or terminal UI imports.
+
+mod client;
+mod discovery;
+mod sessions;
+mod sse;
+mod state;
+
+pub use client::{
+    CommandAccepted, DocApprovalClient, DocApprovalClientError, DocApprovalOutput, TraceEvent,
+};
+pub use discovery::{ServerDiscovery, ServerInfo};
+pub use sessions::{list_sessions, parse_sessions, SessionSummary};
+pub use sse::subscribe_events;
+pub use state::{AppState, StateEvent};
+
+pub const DEFAULT_APP_ID: &str = "doc-approval";
+pub const DEFAULT_BASE_URL: &str = "http://127.0.0.1:8787";
+pub const DEFAULT_WORKSPACE: &str = "local-default";
diff --git a/apps/doc-approval/doc-approval-core-rs/src/sessions.rs b/apps/doc-approval/doc-approval-core-rs/src/sessions.rs
new file mode 100644
index 0000000..9ffc533
--- /dev/null
+++ b/apps/doc-approval/doc-approval-core-rs/src/sessions.rs
@@ -0,0 +1,72 @@
+use serde::Deserialize;
+use serde_json::Value;
+
+use crate::client::{normalize_base_url, DocApprovalClientError};
+
+#[derive(Debug, Clone, PartialEq, Eq, Deserialize)]
+pub struct SessionSummary {
+    pub session_id: String,
+    pub state: String,
+    pub title: Option<String>,
+}
+
+pub async fn list_sessions(
+    http: &reqwest::Client,
+    base_url: &str,
+    workspace_id: &str,
+    app_id: &str,
+    state: Option<&str>,
+) -> Result<Vec<SessionSummary>, DocApprovalClientError> {
+    let mut url = format!(
+        "{}/v1/workspaces/{}/apps/{}/sessions",
+        normalize_base_url(base_url),
+        workspace_id,
+        app_id
+    );
+    if let Some(state) = state {
+        url.push_str(&format!("?state={state}"));
+    }
+    let response = http
+        .get(&url)
+        .send()
+        .await
+        .map_err(|e| DocApprovalClientError::Request(e.to_string()))?;
+    if !response.status().is_success() {
+        return Err(DocApprovalClientError::Http(response.status().as_u16()));
+    }
+    let raw: Value = response
+        .json()
+        .await
+        .map_err(|_| DocApprovalClientError::Decode)?;
+    Ok(parse_sessions(&raw))
+}
+
+pub fn parse_sessions(raw: &Value) -> Vec<SessionSummary> {
+    let items = if let Some(arr) = raw.as_array() {
+        arr.clone()
+    } else if let Some(arr) = raw.get("sessions").and_then(|v| v.as_array()) {
+        arr.clone()
+    } else {
+        return Vec::new();
+    };
+    items
+        .into_iter()
+        .filter_map(|item| {
+            let session_id = item
+                .get("session_id")
+                .or_else(|| item.get("id"))
+                .and_then(|v| v.as_str())?
+                .to_string();
+            let state = item.get("state")?.as_str()?.to_string();
+            let title = item
+                .get("title")
+                .and_then(|v| v.as_str())
+                .map(str::to_string);
+            Some(SessionSummary {
+                session_id,
+                state,
+                title,
+            })
+        })
+        .collect()
+}
diff --git a/apps/doc-approval/doc-approval-core-rs/src/sse.rs b/apps/doc-approval/doc-approval-core-rs/src/sse.rs
new file mode 100644
index 0000000..5d2b146
--- /dev/null
+++ b/apps/doc-approval/doc-approval-core-rs/src/sse.rs
@@ -0,0 +1,104 @@
+use futures_util::{stream, StreamExt};
+use futures_util::stream::BoxStream;
+use reqwest::Client;
+
+use crate::client::{DocApprovalClient, DocApprovalClientError};
+use crate::state::StateEvent;
+
+pub async fn subscribe_events(
+    http: &Client,
+    base_url: &str,
+    workspace_id: &str,
+    app_id: &str,
+) -> Result<BoxStream<'static, Result<StateEvent, DocApprovalClientError>>, DocApprovalClientError>
+{
+    let url = DocApprovalClient::app_events_url(base_url, workspace_id, app_id);
+    let response = http
+        .get(&url)
+        .header("Accept", "text/event-stream")
+        .send()
+        .await
+        .map_err(|e| DocApprovalClientError::Request(e.to_string()))?;
+    if !(200..300).contains(&response.status().as_u16()) {
+        return Err(DocApprovalClientError::Http(response.status().as_u16()));
+    }
+
+    let byte_stream = response.bytes_stream();
+    let event_stream = stream::unfold(
+        SseParser {
+            byte_stream,
+            buffer: String::new(),
+        },
+        |mut parser| async move {
+            loop {
+                if let Some(event) = parser.pop_event() {
+                    return Some((Ok(event), parser));
+                }
+                match parser.byte_stream.next().await {
+                    Some(Ok(chunk)) => {
+                        parser.buffer.push_str(&String::from_utf8_lossy(&chunk));
+                    }
+                    Some(Err(err)) => {
+                        return Some((
+                            Err(DocApprovalClientError::Request(err.to_string())),
+                            parser,
+                        ));
+                    }
+                    None => return None,
+                }
+            }
+        },
+    );
+
+    Ok(Box::pin(event_stream))
+}
+
+struct SseParser<S> {
+    byte_stream: S,
+    buffer: String,
+}
+
+impl<S> SseParser<S> {
+    fn pop_event(&mut self) -> Option<StateEvent> {
+        let idx = self.buffer.find("\n\n")?;
+        let block = self.buffer[..idx].to_string();
+        self.buffer = self.buffer[idx + 2..].to_string();
+        parse_block(&block)
+    }
+}
+
+fn parse_block(block: &str) -> Option<StateEvent> {
+    let mut event_type = String::from("message");
+    let mut data_lines: Vec<String> = Vec::new();
+    for line in block.lines() {
+        if line.starts_with(':') {
+            continue;
+        }
+        if let Some(rest) = line.strip_prefix("event:") {
+            event_type = rest.trim().to_string();
+        } else if let Some(rest) = line.strip_prefix("data:") {
+            data_lines.push(rest.trim().to_string());
+        }
+    }
+    if data_lines.is_empty() && event_type != "heartbeat" {
+        return None;
+    }
+    let data = data_lines.join("\n");
+    StateEvent::from_sse(&event_type, &data)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn parses_capability_result_block() {
+        let block = "event: capability_result\ndata: {\"state\":\"results\",\"session_id\":\"s1\",\"execution_id\":\"e1\",\"output\":{\"docType\":\"nda\",\"parties\":[],\"amounts\":[],\"confidence\":0.9,\"recommendation\":\"approve\"}}";
+        let event = parse_block(block).expect("event");
+        assert_eq!(event.event_type, "capability_result");
+        assert_eq!(
+            event.output.as_ref().map(|o| o.doc_type.as_str()),
+            Some("nda")
+        );
+    }
+}
diff --git a/apps/doc-approval/doc-approval-core-rs/src/state.rs b/apps/doc-approval/doc-approval-core-rs/src/state.rs
new file mode 100644
index 0000000..e11373a
--- /dev/null
+++ b/apps/doc-approval/doc-approval-core-rs/src/state.rs
@@ -0,0 +1,88 @@
+use serde::Deserialize;
+use serde_json::Value;
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum AppState {
+    Idle,
+    Processing,
+    Results,
+    Error,
+    Other(String),
+}
+
+impl AppState {
+    pub fn from_runtime(name: &str) -> Self {
+        match name {
+            "idle" => Self::Idle,
+            "processing" => Self::Processing,
+            "results" => Self::Results,
+            "error" => Self::Error,
+            other => Self::Other(other.to_string()),
+        }
+    }
+
+    pub fn as_str(&self) -> &str {
+        match self {
+            Self::Idle => "idle",
+            Self::Processing => "processing",
+            Self::Results => "results",
+            Self::Error => "error",
+            Self::Other(s) => s.as_str(),
+        }
+    }
+}
+
+#[derive(Debug, Clone, PartialEq)]
+pub struct StateEvent {
+    pub event_type: String,
+    pub state: Option<AppState>,
+    pub session_id: Option<String>,
+    pub execution_id: Option<String>,
+    pub output: Option<crate::DocApprovalOutput>,
+    pub error_message: Option<String>,
+    pub raw: Value,
+}
+
+#[derive(Debug, Deserialize)]
+pub(crate) struct EventPayload {
+    pub state: Option<String>,
+    pub session_id: Option<String>,
+    pub execution_id: Option<String>,
+    pub output: Option<crate::DocApprovalOutput>,
+    pub error: Option<Value>,
+}
+
+impl StateEvent {
+    pub fn from_sse(event_type: &str, data: &str) -> Option<Self> {
+        if event_type == "heartbeat" {
+            return Some(Self {
+                event_type: event_type.to_string(),
+                state: None,
+                session_id: None,
+                execution_id: None,
+                output: None,
+                error_message: None,
+                raw: Value::Null,
+            });
+        }
+        let raw: Value = serde_json::from_str(data).ok()?;
+        let payload: EventPayload = serde_json::from_value(raw.clone()).ok()?;
+        let error_message = match payload.error {
+            Some(Value::String(s)) => Some(s),
+            Some(Value::Object(map)) => map
+                .get("message")
+                .and_then(|v| v.as_str())
+                .map(str::to_string),
+            _ => None,
+        };
+        Some(Self {
+            event_type: event_type.to_string(),
+            state: payload.state.as_deref().map(AppState::from_runtime),
+            session_id: payload.session_id,
+            execution_id: payload.execution_id,
+            output: payload.output,
+            error_message,
+            raw,
+        })
+    }
+}
diff --git a/apps/doc-approval/doc-approval-core-rs/tests/client_tests.rs b/apps/doc-approval/doc-approval-core-rs/tests/client_tests.rs
new file mode 100644
index 0000000..28613b9
--- /dev/null
+++ b/apps/doc-approval/doc-approval-core-rs/tests/client_tests.rs
@@ -0,0 +1,119 @@
+use doc_approval_core_rs::{DocApprovalClient, ServerDiscovery, StateEvent};
+use serde_json::json;
+use wiremock::matchers::{method, path, query_param};
+use wiremock::{Mock, MockServer, ResponseTemplate};
+
+#[tokio::test]
+async fn health_check_ok() {
+    let server = MockServer::start().await;
+    Mock::given(method("GET"))
+        .and(path("/healthz"))
+        .respond_with(ResponseTemplate::new(200))
+        .mount(&server)
+        .await;
+    let client = DocApprovalClient::new();
+    assert!(client.health_check(&server.uri()).await.unwrap());
+}
+
+#[tokio::test]
+async fn send_command_posts_to_apps_commands() {
+    let server = MockServer::start().await;
+    Mock::given(method("POST"))
+        .and(path("/v1/workspaces/local-default/apps/doc-approval/commands"))
+        .respond_with(ResponseTemplate::new(202).set_body_json(json!({
+            "api_version": "v1",
+            "status": "accepted",
+            "workspace_id": "local-default",
+            "app_id": "doc-approval",
+            "session_id": "sess-1",
+            "command": "submit",
+            "state": "processing",
+            "execution_id": "exec-1"
+        })))
+        .mount(&server)
+        .await;
+
+    let client = DocApprovalClient::new();
+    let accepted = client
+        .submit_document(&server.uri(), "local-default", "hello")
+        .await
+        .unwrap();
+    assert_eq!(accepted.session_id, "sess-1");
+}
+
+#[tokio::test]
+async fn list_sessions_parses_pending_review() {
+    let server = MockServer::start().await;
+    Mock::given(method("GET"))
+        .and(path("/v1/workspaces/local-default/apps/doc-approval/sessions"))
+        .and(query_param("state", "pending_review"))
+        .respond_with(ResponseTemplate::new(200).set_body_json(json!({
+            "sessions": [{"session_id":"s1","state":"pending_review","title":"Contract"}]
+        })))
+        .mount(&server)
+        .await;
+
+    let client = DocApprovalClient::new();
+    let sessions = client
+        .list_sessions(&server.uri(), "local-default", Some("pending_review"))
+        .await
+        .unwrap();
+    assert_eq!(sessions.len(), 1);
+    assert_eq!(sessions[0].title.as_deref(), Some("Contract"));
+}
+
+#[tokio::test]
+async fn send_command_for_session_includes_session_id() {
+    let server = MockServer::start().await;
+    Mock::given(method("POST"))
+        .and(path("/v1/workspaces/local-default/apps/doc-approval/commands"))
+        .respond_with(ResponseTemplate::new(202).set_body_json(json!({
+            "api_version": "v1",
+            "status": "accepted",
+            "workspace_id": "local-default",
+            "app_id": "doc-approval",
+            "session_id": "sess-approve",
+            "command": "approve",
+            "state": "approved"
+        })))
+        .mount(&server)
+        .await;
+
+    let client = DocApprovalClient::new();
+    let accepted = client
+        .send_command_for_session(
+            &server.uri(),
+            "local-default",
+            "sess-approve",
+            "approve",
+            &json!({}),
+        )
+        .await
+        .unwrap();
+    assert_eq!(accepted.command, "approve");
+}
+
+#[test]
+fn server_discovery_reads_json() {
+    let mut path = std::env::temp_dir();
+    path.push(format!("doc-approval-core-rs-{}", std::process::id()));
+    let _ = std::fs::remove_dir_all(&path);
+    std::fs::create_dir_all(path.join(".traverse")).unwrap();
+    std::fs::write(
+        path.join(".traverse/server.json"),
+        r#"{"base_url":"http://127.0.0.1:9999","workspace_default":"ws-a"}"#,
+    )
+    .unwrap();
+    let info = ServerDiscovery::from_file(path.join(".traverse/server.json")).unwrap();
+    assert_eq!(info.base_url, "http://127.0.0.1:9999");
+}
+
+#[test]
+fn state_event_from_sse() {
+    let event = StateEvent::from_sse(
+        "capability_result",
+        r#"{"state":"results","output":{"docType":"nda","parties":[],"amounts":[],"confidence":0.5,"recommendation":"review"}}"#,
+    )
+    .unwrap();
+    assert_eq!(event.output.unwrap().doc_type, "nda");
+}
diff --git a/apps/doc-approval/doc-approval-core-rs/tests/sse_tests.rs b/apps/doc-approval/doc-approval-core-rs/tests/sse_tests.rs
new file mode 100644
index 0000000..1a03c48
--- /dev/null
+++ b/apps/doc-approval/doc-approval-core-rs/tests/sse_tests.rs
@@ -0,0 +1,26 @@
+use doc_approval_core_rs::{parse_sessions, StateEvent};
+use serde_json::json;
+
+#[test]
+fn parses_heartbeat() {
+    let event = StateEvent::from_sse("heartbeat", "").unwrap();
+    assert_eq!(event.event_type, "heartbeat");
+}
+
+#[test]
+fn parses_capability_result_payload() {
+    let event = StateEvent::from_sse(
+        "capability_result",
+        r#"{"state":"results","session_id":"s1","execution_id":"e1","output":{"docType":"nda","parties":["A"],"amounts":[],"confidence":0.9,"recommendation":"approve"}}"#,
+    )
+    .unwrap();
+    assert_eq!(event.output.unwrap().recommendation, "approve");
+}
+
+#[test]
+fn parses_sessions_wrapper() {
+    let sessions = parse_sessions(&json!({
+        "sessions": [{"session_id":"s1","state":"pending_review","title":"T"}]
+    }));
+    assert_eq!(sessions[0].session_id, "s1");
+}
diff --git a/apps/doc-approval/linux-gtk/Cargo.toml b/apps/doc-approval/linux-gtk/Cargo.toml
index 81d34c5..20be173 100644
--- a/apps/doc-approval/linux-gtk/Cargo.toml
+++ b/apps/doc-approval/linux-gtk/Cargo.toml
@@ -13,10 +13,11 @@ name = "doc-approval-gtk"
 path = "src/main.rs"
 
 [dependencies]
+doc-approval-core-rs = { path = "../doc-approval-core-rs" }
 gtk4 = "0.9"
 libadwaita = { version = "0.7", features = ["v1_5"] }
-reqwest = { version = "0.12", default-features = false, features = ["json", "rustls-tls"] }
 tokio = { version = "1", features = ["rt-multi-thread", "macros", "time"] }
+futures-util = "0.3"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 directories = "5"
diff --git a/apps/doc-approval/linux-gtk/README.md b/apps/doc-approval/linux-gtk/README.md
index 3387ef6..abbc751 100644
--- a/apps/doc-approval/linux-gtk/README.md
+++ b/apps/doc-approval/linux-gtk/README.md
@@ -1,58 +1,12 @@
 # doc-approval (Linux GTK4)
 
-Native Linux submitter client for the `doc-approval` reference app. Phase 1 uses HTTP polling against the public Traverse HTTP/JSON API (spec 033) — same flow as `web-react` and the other native clients.
+Native Linux client for the `doc-approval` reference app. Uses shared `doc-approval-core-rs` for HTTP command dispatch and SSE app-state events.
 
-## Prerequisites
-
-- **Ubuntu 22.04+** (or equivalent distro with GTK4 + libadwaita)
-- **Rust 1.78+** via [rustup](https://rustup.rs/)
-- **System dependencies**:
-
-```bash
-sudo apt install libgtk-4-dev libadwaita-1-dev
-```
-
-- **Traverse runtime** running locally:
-
-```bash
-git clone https://github.com/traverse-framework/Traverse.git /tmp/traverse
-cd /tmp/traverse && git checkout v0.6.0
-cargo run -p traverse-cli -- serve
-```
-
-## Runtime URL configuration
-
-Open **Preferences** (gear icon in the header bar) and set:
-
-- **Runtime URL** — default `http://127.0.0.1:8787`
-- **Workspace** — default `local-default`
-
-Values persist to `~/.config/doc-approval/settings.json`.
-
-## Build and run
+Requires GTK4 + libadwaita system packages.
 
 ```bash
-cd apps/doc-approval/linux-gtk
-cargo build
-cargo test
-cargo run
+cd apps/doc-approval
+cargo build -p doc-approval-gtk
+cargo test -p doc-approval-core-rs
+cargo run -p doc-approval-gtk
 ```
-
-## Architecture
-
-| File | Role |
-|---|---|
-| `client.rs` | `reqwest` HTTP client (execute / poll / trace / healthz) |
-| `execution_state.rs` | `Arc<Mutex<ExecutionState>>` polling state machine |
-| `ui/main_window.rs` | `AdwApplicationWindow` — document input, analysis output, header health strip |
-| `ui/preferences.rs` | Runtime URL + workspace dialog |
-
-The UI renders runtime-provided output fields only (`docType`, `parties`, `amounts`, `confidence`, `recommendation`).
-
-## Phase 2 (not implemented)
-
-SSE subscription when Traverse ships [#525](https://github.com/traverse-framework/Traverse/issues/525)–[#527](https://github.com/traverse-framework/Traverse/issues/527).
-
-## Design language
-
-Follow [docs/design-language.md](../../../docs/design-language.md).
diff --git a/apps/doc-approval/linux-gtk/src/client.rs b/apps/doc-approval/linux-gtk/src/client.rs
index 3713c15..dbbc016 100644
--- a/apps/doc-approval/linux-gtk/src/client.rs
+++ b/apps/doc-approval/linux-gtk/src/client.rs
@@ -1,193 +1,5 @@
-use serde::Deserialize;
-use serde_json::Value;
-
-#[derive(Debug, Clone, PartialEq, Deserialize)]
-pub struct DocApprovalOutput {
-    #[serde(rename = "docType")]
-    pub doc_type: String,
-    pub parties: Vec<String>,
-    pub amounts: Vec<String>,
-    pub confidence: f64,
-    pub recommendation: String,
-}
-
-#[derive(Debug, Clone, PartialEq, Deserialize)]
-pub struct TraceEvent {
-    pub event_type: String,
-    pub timestamp: String,
-    pub data: Option<Value>,
-}
-
-#[derive(Debug, Clone, PartialEq)]
-pub struct ExecutionPollResult {
-    pub execution_id: String,
-    pub status: String,
-    pub output: Option<DocApprovalOutput>,
-    pub error: Option<String>,
-}
-
-#[derive(Debug, PartialEq, Eq)]
-pub enum TraverseClientError {
-    Http(u16),
-    Decode,
-    Request(String),
-}
-
-impl std::fmt::Display for TraverseClientError {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        match self {
-            Self::Http(code) => write!(f, "HTTP {code}"),
-            Self::Decode => write!(f, "decode failed"),
-            Self::Request(msg) => write!(f, "request failed: {msg}"),
-        }
-    }
-}
-
-impl std::error::Error for TraverseClientError {}
-
-pub struct TraverseClient {
-    http: reqwest::Client,
-}
-
-impl Clone for TraverseClient {
-    fn clone(&self) -> Self {
-        Self {
-            http: self.http.clone(),
-        }
-    }
-}
-
-impl Default for TraverseClient {
-    fn default() -> Self {
-        Self::new()
-    }
-}
-
-impl TraverseClient {
-    pub fn new() -> Self {
-        Self {
-            http: reqwest::Client::new(),
-        }
-    }
-
-    pub fn with_client(http: reqwest::Client) -> Self {
-        Self { http }
-    }
-
-    pub async fn check_health(&self, base_url: &str) -> Result<bool, TraverseClientError> {
-        let url = format!("{}/healthz", normalize_base_url(base_url));
-        let response = self
-            .http
-            .get(url)
-            .send()
-            .await
-            .map_err(|e| TraverseClientError::Request(e.to_string()))?;
-        Ok(response.status().is_success())
-    }
-
-    pub async fn execute(
-        &self,
-        base_url: &str,
-        workspace_id: &str,
-        capability: &str,
-        input: &serde_json::Value,
-    ) -> Result<String, TraverseClientError> {
-        let url = format!(
-            "{}/v1/workspaces/{}/execute",
-            normalize_base_url(base_url),
-            workspace_id
-        );
-        let body = serde_json::json!({ "capability": capability, "input": input });
-        let response = self
-            .http
-            .post(url)
-            .json(&body)
-            .send()
-            .await
-            .map_err(|e| TraverseClientError::Request(e.to_string()))?;
-        if !response.status().is_success() {
-            return Err(TraverseClientError::Http(response.status().as_u16()));
-        }
-        let payload: ExecuteResponse = response
-            .json()
-            .await
-            .map_err(|_| TraverseClientError::Decode)?;
-        Ok(payload.execution_id)
-    }
-
-    pub async fn poll_execution(
-        &self,
-        base_url: &str,
-        workspace_id: &str,
-        execution_id: &str,
-    ) -> Result<ExecutionPollResult, TraverseClientError> {
-        let url = format!(
-            "{}/v1/workspaces/{}/executions/{}",
-            normalize_base_url(base_url),
-            workspace_id,
-            execution_id
-        );
-        let response = self
-            .http
-            .get(url)
-            .send()
-            .await
-            .map_err(|e| TraverseClientError::Request(e.to_string()))?;
-        if !response.status().is_success() {
-            return Err(TraverseClientError::Http(response.status().as_u16()));
-        }
-        let payload: ExecutionPollResponse = response
-            .json()
-            .await
-            .map_err(|_| TraverseClientError::Decode)?;
-        Ok(ExecutionPollResult {
-            execution_id: execution_id.to_string(),
-            status: payload.status,
-            output: payload.output,
-            error: payload.error,
-        })
-    }
-
-    pub async fn fetch_trace(
-        &self,
-        base_url: &str,
-        workspace_id: &str,
-        execution_id: &str,
-    ) -> Result<Vec<TraceEvent>, TraverseClientError> {
-        let url = format!(
-            "{}/v1/workspaces/{}/traces/{}",
-            normalize_base_url(base_url),
-            workspace_id,
-            execution_id
-        );
-        let response = self
-            .http
-            .get(url)
-            .send()
-            .await
-            .map_err(|e| TraverseClientError::Request(e.to_string()))?;
-        if !response.status().is_success() {
-            return Err(TraverseClientError::Http(response.status().as_u16()));
-        }
-        response
-            .json()
-            .await
-            .map_err(|_| TraverseClientError::Decode)
-    }
-}
-
-fn normalize_base_url(base_url: &str) -> String {
-    base_url.trim().trim_end_matches('/').to_string()
-}
-
-#[derive(Debug, Deserialize)]
-struct ExecuteResponse {
-    execution_id: String,
-}
-
-#[derive(Debug, Deserialize)]
-struct ExecutionPollResponse {
-    status: String,
-    output: Option<DocApprovalOutput>,
-    error: Option<String>,
-}
+//! Re-exports the shared doc-approval-core-rs client for the GTK shell.
+pub use doc_approval_core_rs::{
+    DocApprovalClient as TraverseClient, DocApprovalClientError as TraverseClientError,
+    DocApprovalOutput, TraceEvent, DEFAULT_APP_ID,
+};
diff --git a/apps/doc-approval/linux-gtk/src/lib.rs b/apps/doc-approval/linux-gtk/src/lib.rs
index 5ff6964..db90c2f 100644
--- a/apps/doc-approval/linux-gtk/src/lib.rs
+++ b/apps/doc-approval/linux-gtk/src/lib.rs
@@ -3,6 +3,4 @@ pub mod execution_state;
 pub mod settings;
 pub mod ui;
 
-pub const CAPABILITY_ID: &str = "doc-approval.analyze";
-pub const DEFAULT_BASE_URL: &str = "http://127.0.0.1:8787";
-pub const DEFAULT_WORKSPACE: &str = "local-default";
+pub use doc_approval_core_rs::{DEFAULT_APP_ID, DEFAULT_BASE_URL, DEFAULT_WORKSPACE};
diff --git a/apps/doc-approval/linux-gtk/src/ui/main_window.rs b/apps/doc-approval/linux-gtk/src/ui/main_window.rs
index 9d1d083..ac6b905 100644
--- a/apps/doc-approval/linux-gtk/src/ui/main_window.rs
+++ b/apps/doc-approval/linux-gtk/src/ui/main_window.rs
@@ -1,17 +1,20 @@
+use futures_util::StreamExt;
 use gtk4::prelude::*;
 use gtk4::{
-    Box as GtkBox, Button, Label, Orientation, ScrolledWindow, TextView, ToggleButton,
+    Box as GtkBox, Button, Label, Orientation, ScrolledWindow, TextView, TextViewBuffer,
+    ToggleButton,
 };
 use libadwaita as adw;
 use std::cell::RefCell;
 use std::rc::Rc;
 use std::sync::{Arc, Mutex};
+use doc_approval_core_rs::AppState;
 
-use crate::client::TraverseClient;
+use crate::client::{DocApprovalOutput, TraverseClient, DEFAULT_APP_ID};
 use crate::execution_state::{ExecutionPhase, ExecutionState, RuntimeStatus};
 use crate::settings::{load_settings, save_settings, AppSettings};
 use crate::ui::preferences::PreferencesDialog;
-use crate::CAPABILITY_ID;
+
 
 pub struct MainWindow {
     pub window: adw::ApplicationWindow,
@@ -25,7 +28,7 @@ impl MainWindow {
 
         let window = adw::ApplicationWindow::builder()
             .application(app)
-            .title("doc-approval")
+            .title("Doc Approval")
             .default_width(900)
             .default_height(700)
             .build();
@@ -60,8 +63,13 @@ impl MainWindow {
             .build();
         content.append(&document_scroll);
 
+        let document_count = Label::new(Some(&format!("0/{10_000}")));
+        document_count.add_css_class("dim-label");
+        document_count.set_halign(gtk4::Align::End);
+        content.append(&document_count);
+
         let button_row = GtkBox::new(Orientation::Horizontal, 8);
-        let submit_button = Button::with_label("Analyze");
+        let submit_button = Button::with_label("Analyze Document");
         let reset_button = Button::with_label("Reset");
         button_row.append(&submit_button);
         button_row.append(&reset_button);
@@ -76,7 +84,7 @@ impl MainWindow {
 
         content.append(&Label::new(Some("Analysis Result")));
 
-        let output_label = Label::new(Some("Submit a document above to start analysis."));
+        let output_label = Label::new(Some("Submit a document above to start a workflow."));
         output_label.set_wrap(true);
         output_label.set_xalign(0.0);
         output_label.add_css_class("dim-label");
@@ -119,18 +127,18 @@ impl MainWindow {
                 match &state.phase {
                     ExecutionPhase::Idle => {
                         output_label.set_text(if online {
-                            "Submit a document above to start analysis."
+                            "Submit a document above to start a workflow."
                         } else {
                             "Connect to the Traverse runtime to see analysis output here."
                         });
                         output_label.add_css_class("dim-label");
                     }
                     ExecutionPhase::Loading => {
-                        output_label.set_text("Starting analysis…");
+                        output_label.set_text("Starting execution…");
                         output_label.remove_css_class("dim-label");
                     }
                     ExecutionPhase::Polling { execution_id } => {
-                        output_label.set_text(&format!("Polling execution {execution_id}…"));
+                        output_label.set_text(&format!("Waiting for analysis events ({execution_id})…"));
                         output_label.remove_css_class("dim-label");
                     }
                     ExecutionPhase::Failed { error } => {
@@ -170,10 +178,16 @@ impl MainWindow {
 
         document_buffer.connect_changed({
             let state = state.clone();
+            let document_count = document_count.clone();
             let refresh_ui = refresh_ui.clone();
             move |buffer| {
-                let text = buffer.text(&buffer.start_iter(), &buffer.end_iter(), true);
-                state.lock().unwrap().document = text.to_string();
+                let mut text = buffer.text(&buffer.start_iter(), &buffer.end_iter(), true);
+                if text.len() > 10_000 {
+                    text.truncate(10_000);
+                    buffer.set_text(&text);
+                }
+                state.lock().unwrap().document = text.clone();
+                document_count.set_text(&format!("{}/{10_000}", text.len()));
                 refresh_ui();
             }
         });
@@ -207,25 +221,21 @@ impl MainWindow {
                     let state = state.clone();
                     let refresh_ui = refresh_ui.clone();
                     async move {
-                        match client
-                            .execute(
-                                &base_url,
-                                &workspace,
-                                CAPABILITY_ID,
-                                &serde_json::json!({ "document": document }),
-                            )
-                            .await
-                        {
-                            Ok(execution_id) => {
+                        match client.submit_document(&base_url, &workspace, &document).await {
+                            Ok(accepted) => {
+                                let label = accepted
+                                    .execution_id
+                                    .clone()
+                                    .unwrap_or_else(|| accepted.session_id.clone());
                                 state.lock().unwrap().phase =
-                                    ExecutionPhase::Polling { execution_id: execution_id.clone() };
+                                    ExecutionPhase::Polling { execution_id: label };
                                 refresh_ui();
-                                poll_until_terminal(
+                                wait_for_result(
                                     &client,
                                     &state,
                                     &base_url,
                                     &workspace,
-                                    &execution_id,
+                                    &accepted.session_id,
                                     &refresh_ui,
                                 )
                                 .await;
@@ -243,11 +253,9 @@ impl MainWindow {
 
         reset_button.connect_clicked({
             let state = state.clone();
-            let document_buffer = document_buffer.clone();
             let refresh_ui = refresh_ui.clone();
             move |_| {
                 state.lock().unwrap().reset();
-                document_buffer.set_text("");
                 refresh_ui();
             }
         });
@@ -331,50 +339,94 @@ async fn refresh_health(
     });
 }
 
-async fn poll_until_terminal(
+async fn wait_for_result(
     client: &TraverseClient,
     state: &Arc<Mutex<ExecutionState>>,
     base_url: &str,
     workspace: &str,
-    execution_id: &str,
+    session_id: &str,
     refresh_ui: &impl Fn(),
 ) {
-    loop {
-        match client
-            .poll_execution(base_url, workspace, execution_id)
-            .await
-        {
-            Ok(result) if result.status == "succeeded" => {
-                let trace = client
-                    .fetch_trace(base_url, workspace, execution_id)
-                    .await
-                    .unwrap_or_default();
-                let output = result.output.unwrap_or(crate::client::DocApprovalOutput {
-                    doc_type: String::new(),
-                    parties: vec![],
-                    amounts: vec![],
-                    confidence: 0.0,
-                    recommendation: String::new(),
-                });
-                state.lock().unwrap().phase = ExecutionPhase::Succeeded { output, trace };
-                refresh_ui();
-                return;
+    let mut stream = match client
+        .subscribe_events(base_url, workspace, DEFAULT_APP_ID)
+        .await
+    {
+        Ok(stream) => stream,
+        Err(err) => {
+            state.lock().unwrap().phase = ExecutionPhase::Failed {
+                error: err.to_string(),
+            };
+            refresh_ui();
+            return;
+        }
+    };
+
+    while let Some(item) = stream.next().await {
+        match item {
+            Ok(event) if event.event_type == "heartbeat" => continue,
+            Ok(event) => {
+                if let Some(sid) = event.session_id.as_deref() {
+                    if sid != session_id {
+                        continue;
+                    }
+                }
+                if event.event_type == "error"
+                    || matches!(event.state.as_ref(), Some(AppState::Error))
+                {
+                    state.lock().unwrap().phase = ExecutionPhase::Failed {
+                        error: event
+                            .error_message
+                            .unwrap_or_else(|| "execution failed".to_string()),
+                    };
+                    refresh_ui();
+                    return;
+                }
+                let terminal = matches!(event.state.as_ref(), Some(AppState::Results))
+                    || event.event_type == "capability_result";
+                if terminal {
+                    if let Some(output) = event.output {
+                        let execution_id = event.execution_id.clone().unwrap_or_default();
+                        let trace = if execution_id.is_empty() {
+                            Vec::new()
+                        } else {
+                            client
+                                .fetch_trace(base_url, workspace, &execution_id)
+                                .await
+                                .unwrap_or_default()
+                        };
+                        state.lock().unwrap().phase =
+                            ExecutionPhase::Succeeded { output, trace };
+                        refresh_ui();
+                        return;
+                    }
+                    if matches!(event.state.as_ref(), Some(AppState::Results)) {
+                        state.lock().unwrap().phase = ExecutionPhase::Succeeded {
+                            output: DocApprovalOutput {
+                                doc_type: String::new(),
+                                parties: vec![],
+                                amounts: vec![],
+                                confidence: 0.0,
+                                recommendation: String::new(),
+                            },
+                            trace: Vec::new(),
+                        };
+                        refresh_ui();
+                        return;
+                    }
+                }
             }
-            Ok(result) if result.status == "failed" => {
+            Err(err) => {
                 state.lock().unwrap().phase = ExecutionPhase::Failed {
-                    error: result.error.unwrap_or_else(|| "execution failed".to_string()),
+                    error: err.to_string(),
                 };
                 refresh_ui();
                 return;
             }
-            Ok(_) => {
-                glib::timeout_future_seconds(1).await;
-            }
-            Err(err) => {
-                state.lock().unwrap().phase = ExecutionPhase::Failed { error: err.to_string() };
-                refresh_ui();
-                return;
-            }
         }
     }
+
+    state.lock().unwrap().phase = ExecutionPhase::Failed {
+        error: "event stream ended before result".to_string(),
+    };
+    refresh_ui();
 }
diff --git a/apps/doc-approval/linux-gtk/tests/client_tests.rs b/apps/doc-approval/linux-gtk/tests/client_tests.rs
index 9e3965e..be86042 100644
--- a/apps/doc-approval/linux-gtk/tests/client_tests.rs
+++ b/apps/doc-approval/linux-gtk/tests/client_tests.rs
@@ -1,5 +1,4 @@
 use doc_approval_gtk::client::TraverseClient;
-use doc_approval_gtk::CAPABILITY_ID;
 use wiremock::matchers::{method, path};
 use wiremock::{Mock, MockServer, ResponseTemplate};
 
@@ -17,50 +16,27 @@ async fn check_health_returns_true_on_200() {
 }
 
 #[tokio::test]
-async fn execute_returns_execution_id() {
+async fn submit_document_posts_command() {
     let server = MockServer::start().await;
     Mock::given(method("POST"))
-        .respond_with(ResponseTemplate::new(200).set_body_json(serde_json::json!({
+        .and(path("/v1/workspaces/local-default/apps/doc-approval/commands"))
+        .respond_with(ResponseTemplate::new(202).set_body_json(serde_json::json!({
+            "api_version": "v1",
+            "status": "accepted",
+            "workspace_id": "local-default",
+            "app_id": "doc-approval",
+            "session_id": "sess-1",
+            "command": "submit",
+            "state": "processing",
             "execution_id": "exec_abc"
         })))
         .mount(&server)
         .await;
 
     let client = TraverseClient::new();
-    let id = client
-        .execute(
-            &server.uri(),
-            "local-default",
-            CAPABILITY_ID,
-            &serde_json::json!({ "document": "contract" }),
-        )
+    let accepted = client
+        .submit_document(&server.uri(), "local-default", "contract")
         .await
         .unwrap();
-    assert_eq!(id, "exec_abc");
-}
-
-#[tokio::test]
-async fn poll_execution_parses_output() {
-    let server = MockServer::start().await;
-    Mock::given(method("GET"))
-        .respond_with(ResponseTemplate::new(200).set_body_json(serde_json::json!({
-            "status": "succeeded",
-            "output": {
-                "docType": "invoice",
-                "parties": ["A", "B"],
-                "amounts": ["$100"],
-                "confidence": 0.9,
-                "recommendation": "approve"
-            }
-        })))
-        .mount(&server)
-        .await;
-
-    let client = TraverseClient::new();
-    let result = client
-        .poll_execution(&server.uri(), "local-default", "exec_abc")
-        .await
-        .unwrap();
-    assert_eq!(result.status, "succeeded");
-    assert_eq!(result.output.unwrap().doc_type, "invoice");
+    assert_eq!(accepted.execution_id.as_deref(), Some("exec_abc"));
 }
diff --git a/scripts/ci/repository_checks.sh b/scripts/ci/repository_checks.sh
index 0d6e010..d0a16f2 100644
--- a/scripts/ci/repository_checks.sh
+++ b/scripts/ci/repository_checks.sh
@@ -61,6 +61,8 @@ check "apps/doc-approval/linux-gtk/README.md"                             "doc-a
 check "apps/doc-approval/cli-rust/Cargo.toml"                             "doc-approval cli-rust Cargo project"
 check "apps/doc-approval/cli-rust/README.md"                              "doc-approval cli-rust README"
 check "apps/doc-approval/DocApprovalCore/Package.swift"                   "doc-approval DocApprovalCore package"
+check "apps/doc-approval/doc-approval-core-rs/Cargo.toml"                 "doc-approval-core-rs Cargo crate"
+check "apps/doc-approval/Cargo.toml"                                      "doc-approval Cargo workspace"
 
 # meeting-notes clients
 check "apps/meeting-notes/web-react/package.json"                       "meeting-notes web-react package"