From def3afeae59cd78dd64deeb8b4d438d7ae9e7818 Mon Sep 17 00:00:00 2001
From: Sol <solofberlin@fastmail.com>
Date: Mon, 23 Feb 2026 14:26:33 +0100
Subject: [PATCH 01/12] Deprecate codex_mcp backend name via codex alias

---
 lib/solum/actions/tools/spawn_coder.ex | 1 +
 test/solum/tools/spawn_coder_test.exs  | 9 +++++++--
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/lib/solum/actions/tools/spawn_coder.ex b/lib/solum/actions/tools/spawn_coder.ex
index e9a8d3da..4b9b5e76 100644
--- a/lib/solum/actions/tools/spawn_coder.ex
+++ b/lib/solum/actions/tools/spawn_coder.ex
@@ -80,6 +80,7 @@ defmodule Solum.Actions.Tools.SpawnCoder do
   end
 
   defp parse_backend("codex"), do: :codex
+  defp parse_backend("codex_mcp"), do: :codex
   defp parse_backend("claude_code"), do: :claude_code
   defp parse_backend(_), do: :codex
 
diff --git a/test/solum/tools/spawn_coder_test.exs b/test/solum/tools/spawn_coder_test.exs
index 162b3cfe..bd9158b4 100644
--- a/test/solum/tools/spawn_coder_test.exs
+++ b/test/solum/tools/spawn_coder_test.exs
@@ -18,6 +18,11 @@ defmodule Solum.Actions.Tools.SpawnCoderTest do
       assert :ok = SpawnCoder.validate_model_backend(nil, "codex")
     end
 
+    test "treats codex_mcp backend as codex alias" do
+      assert :ok = SpawnCoder.validate_model_backend("gpt-5.3-codex", "codex_mcp")
+      assert {:error, _} = SpawnCoder.validate_model_backend("claude-opus-4-1", "codex_mcp")
+    end
+
     test "allows Anthropic model with claude_code backend" do
       assert :ok = SpawnCoder.validate_model_backend("sonnet", "claude_code")
       assert :ok = SpawnCoder.validate_model_backend("claude-sonnet-4-20250514", "claude_code")
@@ -26,7 +31,7 @@ defmodule Solum.Actions.Tools.SpawnCoderTest do
     test "rejects Anthropic alias with non-claude backend" do
       assert {:error, msg} = SpawnCoder.validate_model_backend("opus", "codex")
       assert msg =~ "Invalid model/backend combination"
-      assert msg =~ "backend 'claude_code'"
+      assert msg =~ "switch backend to 'claude_code'"
     end
 
     test "rejects Anthropic prefixed model with unknown backend (defaults to codex)" do
@@ -39,7 +44,7 @@ defmodule Solum.Actions.Tools.SpawnCoderTest do
 
     test "allows supported OpenAI models with codex backend" do
       assert :ok = SpawnCoder.validate_model_backend("gpt-5.3-codex", "codex")
-      assert :ok = SpawnCoder.validate_model_backend("openai/gpt-4o", "unknown_backend")
+      assert :ok = SpawnCoder.validate_model_backend("gpt-4o", "unknown_backend")
       assert :ok = SpawnCoder.validate_model_backend("o1", "codex")
     end
 

From bc9f70aa06bddd748870caae039295cc36b44557 Mon Sep 17 00:00:00 2001
From: Sol <solofberlin@fastmail.com>
Date: Mon, 23 Feb 2026 19:36:52 +0100
Subject: [PATCH 02/12] chore(codex): fix tests for backend deprecation and
 update TODO

---
 LAUNCH-TODO.md                        | 2 +-
 test/solum/tools/spawn_coder_test.exs | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/LAUNCH-TODO.md b/LAUNCH-TODO.md
index 3e42193f..ac5b9d83 100644
--- a/LAUNCH-TODO.md
+++ b/LAUNCH-TODO.md
@@ -28,7 +28,7 @@
 - [ ] README rewrite
 - [ ] Dashboard polish
 - [ ] **Improve dashboard** — consolidated agents → subagents → coders tree view
-- [ ] **Replace codex backend with codex_mcp (interactive) by default** — keep plain codex only if we want one-shot speed
+- [x] ~~**Replace codex backend with codex_mcp (interactive) by default**~~ — legacy `codex exec` removed, `codex` now uses MCP, `codex_mcp` alias added for compat
 - [ ] OAuth login flow
 - [ ] **Generalize coder wrapper** — support Cursor, Codex, and other coding agents beyond Claude Code
 
diff --git a/test/solum/tools/spawn_coder_test.exs b/test/solum/tools/spawn_coder_test.exs
index 2545f523..20966f68 100644
--- a/test/solum/tools/spawn_coder_test.exs
+++ b/test/solum/tools/spawn_coder_test.exs
@@ -31,7 +31,7 @@ defmodule Solum.Actions.Tools.SpawnCoderTest do
     test "rejects Anthropic alias with non-claude backend" do
       assert {:error, msg} = SpawnCoder.validate_model_backend("opus", "codex")
       assert msg =~ "Invalid model/backend combination"
-      assert msg =~ "switch backend to 'claude_code'"
+      assert msg =~ "Use backend 'claude_code' or 'cursor'"
     end
 
     test "rejects Anthropic prefixed model with unknown backend (defaults to codex)" do

From 88811181c22a800e3b08b8ba1a199a898ff53b98 Mon Sep 17 00:00:00 2001
From: Sol <solofberlin@fastmail.com>
Date: Mon, 23 Feb 2026 19:46:15 +0100
Subject: [PATCH 03/12] fix(deps): add explicit plug dependency for telegex

---
 mix.exs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mix.exs b/mix.exs
index 22b41884..777303b0 100644
--- a/mix.exs
+++ b/mix.exs
@@ -70,7 +70,9 @@ defmodule Solum.MixProject do
       {:esc, "~> 0.9"},
       {:anthropix, "~> 0.6"},
       {:term_ui, "~> 1.0.0-rc"},
-      {:bandit, "~> 1.0"}
+      {:bandit, "~> 1.0"},
+      {:telegex, "~> 1.8"},
+      {:plug, "~> 1.14"}
     ]
   end
 end

From 62c7efc09f946a6225fecb7416ad45d4953590a0 Mon Sep 17 00:00:00 2001
From: Sol <solofberlin@fastmail.com>
Date: Mon, 23 Feb 2026 20:00:45 +0100
Subject: [PATCH 04/12] fix(deps): upgrade telegex to 1.9.0-rc to fix plug
 compilation error

---
 mix.exs  | 2 +-
 mix.lock | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/mix.exs b/mix.exs
index 777303b0..27e5308e 100644
--- a/mix.exs
+++ b/mix.exs
@@ -71,7 +71,7 @@ defmodule Solum.MixProject do
       {:anthropix, "~> 0.6"},
       {:term_ui, "~> 1.0.0-rc"},
       {:bandit, "~> 1.0"},
-      {:telegex, "~> 1.8"},
+      {:telegex, "~> 1.9.0-rc"},
       {:plug, "~> 1.14"}
     ]
   end
diff --git a/mix.lock b/mix.lock
index a5c4eb27..488a0199 100644
--- a/mix.lock
+++ b/mix.lock
@@ -93,7 +93,7 @@
   "slack_elixir": {:hex, :slack_elixir, "1.2.0", "8f8a6aa5d208bc445352d4d0d29bfb8309f4fd956a5b604ea0109e7b94ce7124", [:mix], [{:jason, "~> 1.4", [hex: :jason, repo: "hexpm", optional: false]}, {:req, "~> 0.3", [hex: :req, repo: "hexpm", optional: false]}, {:websockex, "~> 0.4.3", [hex: :websockex, repo: "hexpm", optional: false]}], "hexpm", "4c883805de2f0bf0e517bfaea4ed65afe6a1ae46b9d62590aea313b9f509f5f7"},
   "splode": {:hex, :splode, "0.3.0", "ff8effecc509a51245df2f864ec78d849248647c37a75886033e3b1a53ca9470", [:mix], [], "hexpm", "73cfd0892d7316d6f2c93e6e8784bd6e137b2aa38443de52fd0a25171d106d81"},
   "ssl_verify_fun": {:hex, :ssl_verify_fun, "1.1.7", "354c321cf377240c7b8716899e182ce4890c5938111a1296add3ec74cf1715df", [:make, :mix, :rebar3], [], "hexpm", "fe4c190e8f37401d30167c8c405eda19469f34577987c76dde613e838bbc67f8"},
-  "telegex": {:hex, :telegex, "1.8.0", "982ef33e9576167189c4980c27ebe927e8b0945d0e8c93c1173ea9482ef78137", [:mix], [{:jason, "~> 1.4", [hex: :jason, repo: "hexpm", optional: false]}, {:typed_struct, "~> 0.3.0", [hex: :typed_struct, repo: "hexpm", optional: false]}], "hexpm", "899fdadedc3691faf923e12639247b083f259284b2963e94b265088473c7349b"},
+  "telegex": {:hex, :telegex, "1.9.0-rc.0", "0f5b76a21879c900ddbaa56c582a10b168ebd218d007ed88e11ff1003364f6d5", [:mix], [{:jason, "~> 1.4", [hex: :jason, repo: "hexpm", optional: false]}, {:typed_struct, "~> 0.3.0", [hex: :typed_struct, repo: "hexpm", optional: false]}], "hexpm", "0ab1b2413e29a2b6c0c7ecaa7be4e921dfd7f1adf12e8d5167f27f5bacd78050"},
   "telemetry": {:hex, :telemetry, "1.3.0", "fedebbae410d715cf8e7062c96a1ef32ec22e764197f70cda73d82778d61e7a2", [:rebar3], [], "hexpm", "7015fc8919dbe63764f4b4b87a95b7c0996bd539e0d499be6ec9d7f3875b79e6"},
   "telemetry_metrics": {:hex, :telemetry_metrics, "1.1.0", "5bd5f3b5637e0abea0426b947e3ce5dd304f8b3bc6617039e2b5a008adc02f8f", [:mix], [{:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "e7b79e8ddfde70adb6db8a6623d1778ec66401f366e9a8f5dd0955c56bc8ce67"},
   "telemetry_metrics_prometheus": {:hex, :telemetry_metrics_prometheus, "1.1.0", "1cc23e932c1ef9aa3b91db257ead31ea58d53229d407e059b29bb962c1505a13", [:mix], [{:plug_cowboy, "~> 2.1", [hex: :plug_cowboy, repo: "hexpm", optional: false]}, {:telemetry_metrics_prometheus_core, "~> 1.0", [hex: :telemetry_metrics_prometheus_core, repo: "hexpm", optional: false]}], "hexpm", "d43b3659b3244da44fe0275b717701542365d4519b79d9ce895b9719c1ce4d26"},

From a849f268d31039e53700a47ce9e08f96fc0b5b66 Mon Sep 17 00:00:00 2001
From: Sol <solofberlin@fastmail.com>
Date: Mon, 23 Feb 2026 20:13:31 +0100
Subject: [PATCH 05/12] fix: use telegex master to resolve Plug.Router
 dependency issue

---
 mix.exs  | 4 ++--
 mix.lock | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/mix.exs b/mix.exs
index 27e5308e..946bc759 100644
--- a/mix.exs
+++ b/mix.exs
@@ -71,8 +71,8 @@ defmodule Solum.MixProject do
       {:anthropix, "~> 0.6"},
       {:term_ui, "~> 1.0.0-rc"},
       {:bandit, "~> 1.0"},
-      {:telegex, "~> 1.9.0-rc"},
-      {:plug, "~> 1.14"}
+      {:telegex, git: "https://github.com/telegex/telegex.git", branch: "master", override: true},
+      {:plug, "~> 1.14", override: true}
     ]
   end
 end
diff --git a/mix.lock b/mix.lock
index 488a0199..e62abcc9 100644
--- a/mix.lock
+++ b/mix.lock
@@ -93,7 +93,7 @@
   "slack_elixir": {:hex, :slack_elixir, "1.2.0", "8f8a6aa5d208bc445352d4d0d29bfb8309f4fd956a5b604ea0109e7b94ce7124", [:mix], [{:jason, "~> 1.4", [hex: :jason, repo: "hexpm", optional: false]}, {:req, "~> 0.3", [hex: :req, repo: "hexpm", optional: false]}, {:websockex, "~> 0.4.3", [hex: :websockex, repo: "hexpm", optional: false]}], "hexpm", "4c883805de2f0bf0e517bfaea4ed65afe6a1ae46b9d62590aea313b9f509f5f7"},
   "splode": {:hex, :splode, "0.3.0", "ff8effecc509a51245df2f864ec78d849248647c37a75886033e3b1a53ca9470", [:mix], [], "hexpm", "73cfd0892d7316d6f2c93e6e8784bd6e137b2aa38443de52fd0a25171d106d81"},
   "ssl_verify_fun": {:hex, :ssl_verify_fun, "1.1.7", "354c321cf377240c7b8716899e182ce4890c5938111a1296add3ec74cf1715df", [:make, :mix, :rebar3], [], "hexpm", "fe4c190e8f37401d30167c8c405eda19469f34577987c76dde613e838bbc67f8"},
-  "telegex": {:hex, :telegex, "1.9.0-rc.0", "0f5b76a21879c900ddbaa56c582a10b168ebd218d007ed88e11ff1003364f6d5", [:mix], [{:jason, "~> 1.4", [hex: :jason, repo: "hexpm", optional: false]}, {:typed_struct, "~> 0.3.0", [hex: :typed_struct, repo: "hexpm", optional: false]}], "hexpm", "0ab1b2413e29a2b6c0c7ecaa7be4e921dfd7f1adf12e8d5167f27f5bacd78050"},
+  "telegex": {:git, "https://github.com/telegex/telegex.git", "cc8a77c9436ff89e1e3dc8d0068c8c901d647785", [branch: "master"]},
   "telemetry": {:hex, :telemetry, "1.3.0", "fedebbae410d715cf8e7062c96a1ef32ec22e764197f70cda73d82778d61e7a2", [:rebar3], [], "hexpm", "7015fc8919dbe63764f4b4b87a95b7c0996bd539e0d499be6ec9d7f3875b79e6"},
   "telemetry_metrics": {:hex, :telemetry_metrics, "1.1.0", "5bd5f3b5637e0abea0426b947e3ce5dd304f8b3bc6617039e2b5a008adc02f8f", [:mix], [{:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "e7b79e8ddfde70adb6db8a6623d1778ec66401f366e9a8f5dd0955c56bc8ce67"},
   "telemetry_metrics_prometheus": {:hex, :telemetry_metrics_prometheus, "1.1.0", "1cc23e932c1ef9aa3b91db257ead31ea58d53229d407e059b29bb962c1505a13", [:mix], [{:plug_cowboy, "~> 2.1", [hex: :plug_cowboy, repo: "hexpm", optional: false]}, {:telemetry_metrics_prometheus_core, "~> 1.0", [hex: :telemetry_metrics_prometheus_core, repo: "hexpm", optional: false]}], "hexpm", "d43b3659b3244da44fe0275b717701542365d4519b79d9ce895b9719c1ce4d26"},

From d9e105149740d7d7b1e045a90d0fb6f338aa3aca Mon Sep 17 00:00:00 2001
From: Sol <solofberlin@fastmail.com>
Date: Mon, 23 Feb 2026 20:20:45 +0100
Subject: [PATCH 06/12] fix: pin telegex to 1.8.0 to resolve Plug dependency
 issues

---
 mix.exs  | 4 ++--
 mix.lock | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/mix.exs b/mix.exs
index 946bc759..acf39240 100644
--- a/mix.exs
+++ b/mix.exs
@@ -71,8 +71,8 @@ defmodule Solum.MixProject do
       {:anthropix, "~> 0.6"},
       {:term_ui, "~> 1.0.0-rc"},
       {:bandit, "~> 1.0"},
-      {:telegex, git: "https://github.com/telegex/telegex.git", branch: "master", override: true},
-      {:plug, "~> 1.14", override: true}
+      {:telegex, "1.8.0"},
+      {:plug, "~> 1.14"}
     ]
   end
 end
diff --git a/mix.lock b/mix.lock
index e62abcc9..a5c4eb27 100644
--- a/mix.lock
+++ b/mix.lock
@@ -93,7 +93,7 @@
   "slack_elixir": {:hex, :slack_elixir, "1.2.0", "8f8a6aa5d208bc445352d4d0d29bfb8309f4fd956a5b604ea0109e7b94ce7124", [:mix], [{:jason, "~> 1.4", [hex: :jason, repo: "hexpm", optional: false]}, {:req, "~> 0.3", [hex: :req, repo: "hexpm", optional: false]}, {:websockex, "~> 0.4.3", [hex: :websockex, repo: "hexpm", optional: false]}], "hexpm", "4c883805de2f0bf0e517bfaea4ed65afe6a1ae46b9d62590aea313b9f509f5f7"},
   "splode": {:hex, :splode, "0.3.0", "ff8effecc509a51245df2f864ec78d849248647c37a75886033e3b1a53ca9470", [:mix], [], "hexpm", "73cfd0892d7316d6f2c93e6e8784bd6e137b2aa38443de52fd0a25171d106d81"},
   "ssl_verify_fun": {:hex, :ssl_verify_fun, "1.1.7", "354c321cf377240c7b8716899e182ce4890c5938111a1296add3ec74cf1715df", [:make, :mix, :rebar3], [], "hexpm", "fe4c190e8f37401d30167c8c405eda19469f34577987c76dde613e838bbc67f8"},
-  "telegex": {:git, "https://github.com/telegex/telegex.git", "cc8a77c9436ff89e1e3dc8d0068c8c901d647785", [branch: "master"]},
+  "telegex": {:hex, :telegex, "1.8.0", "982ef33e9576167189c4980c27ebe927e8b0945d0e8c93c1173ea9482ef78137", [:mix], [{:jason, "~> 1.4", [hex: :jason, repo: "hexpm", optional: false]}, {:typed_struct, "~> 0.3.0", [hex: :typed_struct, repo: "hexpm", optional: false]}], "hexpm", "899fdadedc3691faf923e12639247b083f259284b2963e94b265088473c7349b"},
   "telemetry": {:hex, :telemetry, "1.3.0", "fedebbae410d715cf8e7062c96a1ef32ec22e764197f70cda73d82778d61e7a2", [:rebar3], [], "hexpm", "7015fc8919dbe63764f4b4b87a95b7c0996bd539e0d499be6ec9d7f3875b79e6"},
   "telemetry_metrics": {:hex, :telemetry_metrics, "1.1.0", "5bd5f3b5637e0abea0426b947e3ce5dd304f8b3bc6617039e2b5a008adc02f8f", [:mix], [{:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "e7b79e8ddfde70adb6db8a6623d1778ec66401f366e9a8f5dd0955c56bc8ce67"},
   "telemetry_metrics_prometheus": {:hex, :telemetry_metrics_prometheus, "1.1.0", "1cc23e932c1ef9aa3b91db257ead31ea58d53229d407e059b29bb962c1505a13", [:mix], [{:plug_cowboy, "~> 2.1", [hex: :plug_cowboy, repo: "hexpm", optional: false]}, {:telemetry_metrics_prometheus_core, "~> 1.0", [hex: :telemetry_metrics_prometheus_core, repo: "hexpm", optional: false]}], "hexpm", "d43b3659b3244da44fe0275b717701542365d4519b79d9ce895b9719c1ce4d26"},

From 8084217b13031c95797812e679a82eb7bd3bf59a Mon Sep 17 00:00:00 2001
From: Sol <solofberlin@fastmail.com>
Date: Mon, 23 Feb 2026 20:32:35 +0100
Subject: [PATCH 07/12] fix(deps): upgrade telegex to 1.9.0-rc.0 to fix
 compilation

---
 mix.exs  | 2 +-
 mix.lock | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/mix.exs b/mix.exs
index acf39240..fa06cc8b 100644
--- a/mix.exs
+++ b/mix.exs
@@ -71,7 +71,7 @@ defmodule Solum.MixProject do
       {:anthropix, "~> 0.6"},
       {:term_ui, "~> 1.0.0-rc"},
       {:bandit, "~> 1.0"},
-      {:telegex, "1.8.0"},
+      {:telegex, "1.9.0-rc.0"},
       {:plug, "~> 1.14"}
     ]
   end
diff --git a/mix.lock b/mix.lock
index a5c4eb27..488a0199 100644
--- a/mix.lock
+++ b/mix.lock
@@ -93,7 +93,7 @@
   "slack_elixir": {:hex, :slack_elixir, "1.2.0", "8f8a6aa5d208bc445352d4d0d29bfb8309f4fd956a5b604ea0109e7b94ce7124", [:mix], [{:jason, "~> 1.4", [hex: :jason, repo: "hexpm", optional: false]}, {:req, "~> 0.3", [hex: :req, repo: "hexpm", optional: false]}, {:websockex, "~> 0.4.3", [hex: :websockex, repo: "hexpm", optional: false]}], "hexpm", "4c883805de2f0bf0e517bfaea4ed65afe6a1ae46b9d62590aea313b9f509f5f7"},
   "splode": {:hex, :splode, "0.3.0", "ff8effecc509a51245df2f864ec78d849248647c37a75886033e3b1a53ca9470", [:mix], [], "hexpm", "73cfd0892d7316d6f2c93e6e8784bd6e137b2aa38443de52fd0a25171d106d81"},
   "ssl_verify_fun": {:hex, :ssl_verify_fun, "1.1.7", "354c321cf377240c7b8716899e182ce4890c5938111a1296add3ec74cf1715df", [:make, :mix, :rebar3], [], "hexpm", "fe4c190e8f37401d30167c8c405eda19469f34577987c76dde613e838bbc67f8"},
-  "telegex": {:hex, :telegex, "1.8.0", "982ef33e9576167189c4980c27ebe927e8b0945d0e8c93c1173ea9482ef78137", [:mix], [{:jason, "~> 1.4", [hex: :jason, repo: "hexpm", optional: false]}, {:typed_struct, "~> 0.3.0", [hex: :typed_struct, repo: "hexpm", optional: false]}], "hexpm", "899fdadedc3691faf923e12639247b083f259284b2963e94b265088473c7349b"},
+  "telegex": {:hex, :telegex, "1.9.0-rc.0", "0f5b76a21879c900ddbaa56c582a10b168ebd218d007ed88e11ff1003364f6d5", [:mix], [{:jason, "~> 1.4", [hex: :jason, repo: "hexpm", optional: false]}, {:typed_struct, "~> 0.3.0", [hex: :typed_struct, repo: "hexpm", optional: false]}], "hexpm", "0ab1b2413e29a2b6c0c7ecaa7be4e921dfd7f1adf12e8d5167f27f5bacd78050"},
   "telemetry": {:hex, :telemetry, "1.3.0", "fedebbae410d715cf8e7062c96a1ef32ec22e764197f70cda73d82778d61e7a2", [:rebar3], [], "hexpm", "7015fc8919dbe63764f4b4b87a95b7c0996bd539e0d499be6ec9d7f3875b79e6"},
   "telemetry_metrics": {:hex, :telemetry_metrics, "1.1.0", "5bd5f3b5637e0abea0426b947e3ce5dd304f8b3bc6617039e2b5a008adc02f8f", [:mix], [{:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "e7b79e8ddfde70adb6db8a6623d1778ec66401f366e9a8f5dd0955c56bc8ce67"},
   "telemetry_metrics_prometheus": {:hex, :telemetry_metrics_prometheus, "1.1.0", "1cc23e932c1ef9aa3b91db257ead31ea58d53229d407e059b29bb962c1505a13", [:mix], [{:plug_cowboy, "~> 2.1", [hex: :plug_cowboy, repo: "hexpm", optional: false]}, {:telemetry_metrics_prometheus_core, "~> 1.0", [hex: :telemetry_metrics_prometheus_core, repo: "hexpm", optional: false]}], "hexpm", "d43b3659b3244da44fe0275b717701542365d4519b79d9ce895b9719c1ce4d26"},

From b2a42454e446ad46daefbdd8c256990c5443dc42 Mon Sep 17 00:00:00 2001
From: Sol <solofberlin@fastmail.com>
Date: Mon, 23 Feb 2026 20:42:20 +0100
Subject: [PATCH 08/12] fix(deps): pin telegex to 1.7.0 to fix compilation
 error

---
 mix.exs  | 2 +-
 mix.lock | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/mix.exs b/mix.exs
index fa06cc8b..270cee0f 100644
--- a/mix.exs
+++ b/mix.exs
@@ -71,7 +71,7 @@ defmodule Solum.MixProject do
       {:anthropix, "~> 0.6"},
       {:term_ui, "~> 1.0.0-rc"},
       {:bandit, "~> 1.0"},
-      {:telegex, "1.9.0-rc.0"},
+      {:telegex, "1.7.0", override: true},
       {:plug, "~> 1.14"}
     ]
   end
diff --git a/mix.lock b/mix.lock
index 488a0199..e4bf683b 100644
--- a/mix.lock
+++ b/mix.lock
@@ -93,7 +93,7 @@
   "slack_elixir": {:hex, :slack_elixir, "1.2.0", "8f8a6aa5d208bc445352d4d0d29bfb8309f4fd956a5b604ea0109e7b94ce7124", [:mix], [{:jason, "~> 1.4", [hex: :jason, repo: "hexpm", optional: false]}, {:req, "~> 0.3", [hex: :req, repo: "hexpm", optional: false]}, {:websockex, "~> 0.4.3", [hex: :websockex, repo: "hexpm", optional: false]}], "hexpm", "4c883805de2f0bf0e517bfaea4ed65afe6a1ae46b9d62590aea313b9f509f5f7"},
   "splode": {:hex, :splode, "0.3.0", "ff8effecc509a51245df2f864ec78d849248647c37a75886033e3b1a53ca9470", [:mix], [], "hexpm", "73cfd0892d7316d6f2c93e6e8784bd6e137b2aa38443de52fd0a25171d106d81"},
   "ssl_verify_fun": {:hex, :ssl_verify_fun, "1.1.7", "354c321cf377240c7b8716899e182ce4890c5938111a1296add3ec74cf1715df", [:make, :mix, :rebar3], [], "hexpm", "fe4c190e8f37401d30167c8c405eda19469f34577987c76dde613e838bbc67f8"},
-  "telegex": {:hex, :telegex, "1.9.0-rc.0", "0f5b76a21879c900ddbaa56c582a10b168ebd218d007ed88e11ff1003364f6d5", [:mix], [{:jason, "~> 1.4", [hex: :jason, repo: "hexpm", optional: false]}, {:typed_struct, "~> 0.3.0", [hex: :typed_struct, repo: "hexpm", optional: false]}], "hexpm", "0ab1b2413e29a2b6c0c7ecaa7be4e921dfd7f1adf12e8d5167f27f5bacd78050"},
+  "telegex": {:hex, :telegex, "1.7.0", "82e5bda6ba9ad1106068cbc8b0f258aa2e517ba77d38ad308f2ff08881789d19", [:mix], [{:jason, "~> 1.4", [hex: :jason, repo: "hexpm", optional: false]}, {:typed_struct, "~> 0.3.0", [hex: :typed_struct, repo: "hexpm", optional: false]}], "hexpm", "070c5f35df6da8b51024f867a330ceeda7b5553b6035830b4f063522014e1dbd"},
   "telemetry": {:hex, :telemetry, "1.3.0", "fedebbae410d715cf8e7062c96a1ef32ec22e764197f70cda73d82778d61e7a2", [:rebar3], [], "hexpm", "7015fc8919dbe63764f4b4b87a95b7c0996bd539e0d499be6ec9d7f3875b79e6"},
   "telemetry_metrics": {:hex, :telemetry_metrics, "1.1.0", "5bd5f3b5637e0abea0426b947e3ce5dd304f8b3bc6617039e2b5a008adc02f8f", [:mix], [{:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "e7b79e8ddfde70adb6db8a6623d1778ec66401f366e9a8f5dd0955c56bc8ce67"},
   "telemetry_metrics_prometheus": {:hex, :telemetry_metrics_prometheus, "1.1.0", "1cc23e932c1ef9aa3b91db257ead31ea58d53229d407e059b29bb962c1505a13", [:mix], [{:plug_cowboy, "~> 2.1", [hex: :plug_cowboy, repo: "hexpm", optional: false]}, {:telemetry_metrics_prometheus_core, "~> 1.0", [hex: :telemetry_metrics_prometheus_core, repo: "hexpm", optional: false]}], "hexpm", "d43b3659b3244da44fe0275b717701542365d4519b79d9ce895b9719c1ce4d26"},

From aee93dcdb86bc416eee8499969654841d2f6bc18 Mon Sep 17 00:00:00 2001
From: Sol <solofberlin@fastmail.com>
Date: Mon, 23 Feb 2026 21:02:28 +0100
Subject: [PATCH 09/12] chore: use telegex fork to fix elixir 1.19 compat

---
 mix.exs  | 2 +-
 mix.lock | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/mix.exs b/mix.exs
index 270cee0f..3198060d 100644
--- a/mix.exs
+++ b/mix.exs
@@ -71,7 +71,7 @@ defmodule Solum.MixProject do
       {:anthropix, "~> 0.6"},
       {:term_ui, "~> 1.0.0-rc"},
       {:bandit, "~> 1.0"},
-      {:telegex, "1.7.0", override: true},
+      {:telegex, github: "mikehostetler/telegex", branch: "fix/plug-router-guard", override: true},
       {:plug, "~> 1.14"}
     ]
   end
diff --git a/mix.lock b/mix.lock
index e4bf683b..738a88ea 100644
--- a/mix.lock
+++ b/mix.lock
@@ -93,7 +93,7 @@
   "slack_elixir": {:hex, :slack_elixir, "1.2.0", "8f8a6aa5d208bc445352d4d0d29bfb8309f4fd956a5b604ea0109e7b94ce7124", [:mix], [{:jason, "~> 1.4", [hex: :jason, repo: "hexpm", optional: false]}, {:req, "~> 0.3", [hex: :req, repo: "hexpm", optional: false]}, {:websockex, "~> 0.4.3", [hex: :websockex, repo: "hexpm", optional: false]}], "hexpm", "4c883805de2f0bf0e517bfaea4ed65afe6a1ae46b9d62590aea313b9f509f5f7"},
   "splode": {:hex, :splode, "0.3.0", "ff8effecc509a51245df2f864ec78d849248647c37a75886033e3b1a53ca9470", [:mix], [], "hexpm", "73cfd0892d7316d6f2c93e6e8784bd6e137b2aa38443de52fd0a25171d106d81"},
   "ssl_verify_fun": {:hex, :ssl_verify_fun, "1.1.7", "354c321cf377240c7b8716899e182ce4890c5938111a1296add3ec74cf1715df", [:make, :mix, :rebar3], [], "hexpm", "fe4c190e8f37401d30167c8c405eda19469f34577987c76dde613e838bbc67f8"},
-  "telegex": {:hex, :telegex, "1.7.0", "82e5bda6ba9ad1106068cbc8b0f258aa2e517ba77d38ad308f2ff08881789d19", [:mix], [{:jason, "~> 1.4", [hex: :jason, repo: "hexpm", optional: false]}, {:typed_struct, "~> 0.3.0", [hex: :typed_struct, repo: "hexpm", optional: false]}], "hexpm", "070c5f35df6da8b51024f867a330ceeda7b5553b6035830b4f063522014e1dbd"},
+  "telegex": {:git, "https://github.com/mikehostetler/telegex.git", "a07f4e180cd5ffb024c76557bb13f9f72c0d61f8", [branch: "fix/plug-router-guard"]},
   "telemetry": {:hex, :telemetry, "1.3.0", "fedebbae410d715cf8e7062c96a1ef32ec22e764197f70cda73d82778d61e7a2", [:rebar3], [], "hexpm", "7015fc8919dbe63764f4b4b87a95b7c0996bd539e0d499be6ec9d7f3875b79e6"},
   "telemetry_metrics": {:hex, :telemetry_metrics, "1.1.0", "5bd5f3b5637e0abea0426b947e3ce5dd304f8b3bc6617039e2b5a008adc02f8f", [:mix], [{:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "e7b79e8ddfde70adb6db8a6623d1778ec66401f366e9a8f5dd0955c56bc8ce67"},
   "telemetry_metrics_prometheus": {:hex, :telemetry_metrics_prometheus, "1.1.0", "1cc23e932c1ef9aa3b91db257ead31ea58d53229d407e059b29bb962c1505a13", [:mix], [{:plug_cowboy, "~> 2.1", [hex: :plug_cowboy, repo: "hexpm", optional: false]}, {:telemetry_metrics_prometheus_core, "~> 1.0", [hex: :telemetry_metrics_prometheus_core, repo: "hexpm", optional: false]}], "hexpm", "d43b3659b3244da44fe0275b717701542365d4519b79d9ce895b9719c1ce4d26"},

From b41965864aebe94df5a0f8a594c7ce460ec4c56a Mon Sep 17 00:00:00 2001
From: Sol <solofberlin@fastmail.com>
Date: Mon, 23 Feb 2026 21:10:51 +0100
Subject: [PATCH 10/12] chore: remove codex_mcp alias and update todo

---
 LAUNCH-TODO.md                         |  2 +-
 lib/solum/actions/tools/spawn_coder.ex |  1 -
 task-deprecate-codex.md                | 39 ++++++++++++++++++++++++++
 test/solum/tools/spawn_coder_test.exs  |  5 ----
 4 files changed, 40 insertions(+), 7 deletions(-)
 create mode 100644 task-deprecate-codex.md

diff --git a/LAUNCH-TODO.md b/LAUNCH-TODO.md
index ac5b9d83..238676d0 100644
--- a/LAUNCH-TODO.md
+++ b/LAUNCH-TODO.md
@@ -28,7 +28,7 @@
 - [ ] README rewrite
 - [ ] Dashboard polish
 - [ ] **Improve dashboard** — consolidated agents → subagents → coders tree view
-- [x] ~~**Replace codex backend with codex_mcp (interactive) by default**~~ — legacy `codex exec` removed, `codex` now uses MCP, `codex_mcp` alias added for compat
+- [x] ~~**Replace codex backend with MCP (interactive) by default**~~ — legacy `codex exec` removed, `codex` now uses MCP exclusively.
 - [ ] OAuth login flow
 - [ ] **Generalize coder wrapper** — support Cursor, Codex, and other coding agents beyond Claude Code
 
diff --git a/lib/solum/actions/tools/spawn_coder.ex b/lib/solum/actions/tools/spawn_coder.ex
index 8eafa35d..9eb9f472 100644
--- a/lib/solum/actions/tools/spawn_coder.ex
+++ b/lib/solum/actions/tools/spawn_coder.ex
@@ -85,7 +85,6 @@ defmodule Solum.Actions.Tools.SpawnCoder do
   end
 
   defp parse_backend("codex"), do: :codex
-  defp parse_backend("codex_mcp"), do: :codex
   defp parse_backend("claude_code"), do: :claude_code
   defp parse_backend("cursor"), do: :cursor
   defp parse_backend(_), do: :codex
diff --git a/task-deprecate-codex.md b/task-deprecate-codex.md
new file mode 100644
index 00000000..f4868ce9
--- /dev/null
+++ b/task-deprecate-codex.md
@@ -0,0 +1,39 @@
+# Task: Deprecate Legacy Codex and Promote CodexMcp
+
+The goal is to remove the old "fire-and-forget" Codex backend and make the interactive MCP-based backend the default for `backend: "codex"`.
+
+## Context
+- We currently have two Codex backends:
+  1.  Legacy: Fire-and-forget, uses `Exec` directly.
+  2.  New: Interactive, uses `CodexMcp` (Model Context Protocol).
+- We want to delete (1) and make (2) the implementation for `backend: :codex`.
+
+## Instructions
+
+1.  **Analyze current backends**:
+    -   Look at `lib/solum/agent/coder/backend/`.
+    -   Identify the legacy implementation (likely `Codex.ex` or similar).
+    -   Identify the new implementation (`CodexMcp.ex`).
+
+2.  **Remove Legacy**:
+    -   Delete the legacy implementation file.
+    -   Remove any specific configuration or support code for it.
+
+3.  **Promote MCP Backend**:
+    -   Rename `Solum.Agent.Coder.Backend.CodexMcp` to `Solum.Agent.Coder.Backend.Codex`.
+    -   Update the module name in the file.
+    -   Update any references in `spawn_coder.ex` (though we might have just mapped the atom there).
+
+4.  **Update `spawn_coder.ex`**:
+    -   Ensure `parse_backend("codex")` returns `:codex`.
+    -   Ensure `parse_backend("codex_mcp")` also returns `:codex` (for backward compat) or is removed if no longer needed.
+    -   Ensure the `spawn_coder` tool uses the new `Codex` backend (which is now the MCP one).
+
+5.  **Verify & Test**:
+    -   Run `mix compile` to catch renamed module issues.
+    -   Run tests related to coders: `mix test test/solum/agent/coder_test.exs` (or similar).
+    -   Ensure `spawn_coder` with `backend: "codex"` still works (you can dry-run or check logic).
+
+## Constraint
+- Do NOT break `claude_code` backend.
+- Keep `codex_mcp` as an alias if helpful, but the implementation should be the new one.
diff --git a/test/solum/tools/spawn_coder_test.exs b/test/solum/tools/spawn_coder_test.exs
index 20966f68..0fe7329e 100644
--- a/test/solum/tools/spawn_coder_test.exs
+++ b/test/solum/tools/spawn_coder_test.exs
@@ -18,11 +18,6 @@ defmodule Solum.Actions.Tools.SpawnCoderTest do
       assert :ok = SpawnCoder.validate_model_backend(nil, "codex")
     end
 
-    test "treats codex_mcp backend as codex alias" do
-      assert :ok = SpawnCoder.validate_model_backend("gpt-5.3-codex", "codex_mcp")
-      assert {:error, _} = SpawnCoder.validate_model_backend("claude-opus-4-1", "codex_mcp")
-    end
-
     test "allows Anthropic model with claude_code backend" do
       assert :ok = SpawnCoder.validate_model_backend("sonnet", "claude_code")
       assert :ok = SpawnCoder.validate_model_backend("claude-sonnet-4-20250514", "claude_code")

From c5311e54f5d953fb2341abba6091c3e85289ac55 Mon Sep 17 00:00:00 2001
From: Sol <solofberlin@fastmail.com>
Date: Mon, 23 Feb 2026 21:11:48 +0100
Subject: [PATCH 11/12] chore: remove task file

---
 task-deprecate-codex.md | 39 ---------------------------------------
 1 file changed, 39 deletions(-)
 delete mode 100644 task-deprecate-codex.md

diff --git a/task-deprecate-codex.md b/task-deprecate-codex.md
deleted file mode 100644
index f4868ce9..00000000
--- a/task-deprecate-codex.md
+++ /dev/null
@@ -1,39 +0,0 @@
-# Task: Deprecate Legacy Codex and Promote CodexMcp
-
-The goal is to remove the old "fire-and-forget" Codex backend and make the interactive MCP-based backend the default for `backend: "codex"`.
-
-## Context
-- We currently have two Codex backends:
-  1.  Legacy: Fire-and-forget, uses `Exec` directly.
-  2.  New: Interactive, uses `CodexMcp` (Model Context Protocol).
-- We want to delete (1) and make (2) the implementation for `backend: :codex`.
-
-## Instructions
-
-1.  **Analyze current backends**:
-    -   Look at `lib/solum/agent/coder/backend/`.
-    -   Identify the legacy implementation (likely `Codex.ex` or similar).
-    -   Identify the new implementation (`CodexMcp.ex`).
-
-2.  **Remove Legacy**:
-    -   Delete the legacy implementation file.
-    -   Remove any specific configuration or support code for it.
-
-3.  **Promote MCP Backend**:
-    -   Rename `Solum.Agent.Coder.Backend.CodexMcp` to `Solum.Agent.Coder.Backend.Codex`.
-    -   Update the module name in the file.
-    -   Update any references in `spawn_coder.ex` (though we might have just mapped the atom there).
-
-4.  **Update `spawn_coder.ex`**:
-    -   Ensure `parse_backend("codex")` returns `:codex`.
-    -   Ensure `parse_backend("codex_mcp")` also returns `:codex` (for backward compat) or is removed if no longer needed.
-    -   Ensure the `spawn_coder` tool uses the new `Codex` backend (which is now the MCP one).
-
-5.  **Verify & Test**:
-    -   Run `mix compile` to catch renamed module issues.
-    -   Run tests related to coders: `mix test test/solum/agent/coder_test.exs` (or similar).
-    -   Ensure `spawn_coder` with `backend: "codex"` still works (you can dry-run or check logic).
-
-## Constraint
-- Do NOT break `claude_code` backend.
-- Keep `codex_mcp` as an alias if helpful, but the implementation should be the new one.

From 7a1185df0f6013c73976b5712986cb8ee57bf1ea Mon Sep 17 00:00:00 2001
From: Sol <solofberlin@fastmail.com>
Date: Mon, 23 Feb 2026 21:19:17 +0100
Subject: [PATCH 12/12] style: fix formatting

---
 lib/solum/agent/coder_registry.ex | 3 ++-
 mix.exs                           | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/solum/agent/coder_registry.ex b/lib/solum/agent/coder_registry.ex
index 2f2e9b33..f6296bb3 100644
--- a/lib/solum/agent/coder_registry.ex
+++ b/lib/solum/agent/coder_registry.ex
@@ -198,7 +198,8 @@ defmodule Solum.Agent.CoderRegistry do
       is_number(info.duration_ms) ->
         info.duration_ms
 
-      info.status in [:running, :waiting, :starting, :stuck] and match?(%DateTime{}, info.started_at) ->
+      info.status in [:running, :waiting, :starting, :stuck] and
+          match?(%DateTime{}, info.started_at) ->
         started_ms = DateTime.to_unix(info.started_at, :millisecond)
         max(now_ms - started_ms, 0)
 
diff --git a/mix.exs b/mix.exs
index 3198060d..63eea661 100644
--- a/mix.exs
+++ b/mix.exs
@@ -71,7 +71,8 @@ defmodule Solum.MixProject do
       {:anthropix, "~> 0.6"},
       {:term_ui, "~> 1.0.0-rc"},
       {:bandit, "~> 1.0"},
-      {:telegex, github: "mikehostetler/telegex", branch: "fix/plug-router-guard", override: true},
+      {:telegex,
+       github: "mikehostetler/telegex", branch: "fix/plug-router-guard", override: true},
       {:plug, "~> 1.14"}
     ]
   end