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Keep Codex config writable for hook trust #1

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0063e8a
Keep Codex config writable for hook trust
nickdichev Aug 4, 2026
1abbc80
Update Hermes Desktop to 0.18.2
nickdichev Aug 17, 2026
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44 changes: 43 additions & 1 deletion modules/ai.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -57,6 +57,47 @@ let
command = "${kagiWrapper}";
};
};

codexMcpConfig = (pkgs.formats.toml { }).generate "codex-mcp.toml" {
mcp_servers = mcpServers;
};

# Keep Codex's main config writable so it can persist runtime state such as
# project and hook trust. Home Manager owns only the marked MCP section.
codexConfigSetup = ''
config_dir="''${CODEX_HOME:-$HOME/.codex}"
config_file="$config_dir/config.toml"
mkdir -p "$config_dir"

if [ -L "$config_file" ]; then
tmp_file="$(${pkgs.coreutils}/bin/mktemp "$config_file.tmp.XXXXXX")"
${pkgs.coreutils}/bin/cp -L "$config_file" "$tmp_file"
${pkgs.coreutils}/bin/rm "$config_file"
${pkgs.coreutils}/bin/mv "$tmp_file" "$config_file"
elif [ ! -e "$config_file" ]; then
${pkgs.coreutils}/bin/touch "$config_file"
fi

stripped_file="$(${pkgs.coreutils}/bin/mktemp "$config_file.stripped.XXXXXX")"
tmp_file="$(${pkgs.coreutils}/bin/mktemp "$config_file.tmp.XXXXXX")"

${pkgs.gawk}/bin/awk '
$0 == "# BEGIN home-manager managed mcp_servers" { skip = 1; next }
$0 == "# END home-manager managed mcp_servers" { skip = 0; next }
!skip { print }
' "$config_file" > "$stripped_file"

{
${pkgs.coreutils}/bin/cat "$stripped_file"
printf '\n# BEGIN home-manager managed mcp_servers\n'
${pkgs.coreutils}/bin/cat ${codexMcpConfig}
printf '# END home-manager managed mcp_servers\n'
} > "$tmp_file"

${pkgs.coreutils}/bin/mv "$tmp_file" "$config_file"
${pkgs.coreutils}/bin/rm -f "$stripped_file"
${pkgs.coreutils}/bin/chmod 600 "$config_file"
'';
in
{
options.profiles.ai = {
Expand All @@ -68,7 +109,6 @@ in
enable = true;
package = codex;
settings = null;
profiles.home-manager.mcp_servers = mcpServers;
};

programs.claude-code = {
Expand Down Expand Up @@ -110,6 +150,8 @@ in
playwright-cli
];

home.activation.codexConfig = lib.hm.dag.entryAfter [ "writeBoundary" ] codexConfigSetup;

home.file = {
".codex/skills/audit-nix-app-updates" = {
source = ../config/codex/skills/audit-nix-app-updates;
Expand Down
2 changes: 1 addition & 1 deletion modules/shell.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -304,7 +304,7 @@ in
dc = "dclaude";
dcc = "dclaude --continue";
dcr = "dclaude --resume";
cdx = "codex --profile home-manager --yolo";
cdx = "codex --yolo";

wtrm = "wt remove --force";
wtrmm = "wt remove --force --no-hooks -D";
Expand Down
8 changes: 4 additions & 4 deletions pkgs/hermes-desktop/default.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -6,8 +6,8 @@
}:

let
version = "0.17.0";
rev = "413ed6b9df18f22152d26b6de4093280dcb2b16b";
version = "0.18.2";
rev = "9de9c25f620ff7f1ce0fd5457d596052d5159596";
in
buildNpmPackage {
pname = "hermes-desktop";
Expand All @@ -17,11 +17,11 @@ buildNpmPackage {
owner = "NousResearch";
repo = "hermes-agent";
inherit rev;
hash = "sha256-wek7P9tdrqRk/ArxBXt/X3BJpQ+wcnKFqG0S+ryx5p0=";
hash = "sha256-RieWkLWEn21aamFvQTTnJwwQl00JJGgp3LvY3D3G3jQ=";
};

npmWorkspace = "apps/desktop";
npmDepsHash = "sha256-RqQyEqzeSlywA83+S9d0KXBnirIVPNFixXCyaE523zo=";
npmDepsHash = "sha256-qDXGL/INHPW0pTF4SRVL1dS5XVh2X85dEE4JhrAQeqU=";

env = {
ELECTRON_SKIP_BINARY_DOWNLOAD = "1";
Expand Down