diff --git a/scripts/completion/ccs.bash b/scripts/completion/ccs.bash
index f7d19e10..a1b27984 100644
--- a/scripts/completion/ccs.bash
+++ b/scripts/completion/ccs.bash
@@ -22,18 +22,6 @@ __ccs_completion_run() {
   local current="$1"
   shift || true
 
-  local script_dir repo_root repo_cli
-  script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-  repo_root="$(cd "${script_dir}/../.." && pwd)"
-  repo_cli="${repo_root}/dist/ccs.js"
-  if [[ ! -f "${repo_cli}" ]]; then
-    repo_cli="${repo_root}/bin/ccs.js"
-  fi
-  if [[ -f "${repo_cli}" ]]; then
-    node "${repo_cli}" __complete --shell bash --current "${current}" -- "$@" 2>/dev/null
-    return 0
-  fi
-
   if command -v ccs >/dev/null 2>&1; then
     ccs __complete --shell bash --current "${current}" -- "$@" 2>/dev/null
   fi
diff --git a/scripts/completion/ccs.fish b/scripts/completion/ccs.fish
index 96d801bf..c06111e3 100644
--- a/scripts/completion/ccs.fish
+++ b/scripts/completion/ccs.fish
@@ -11,17 +11,6 @@ function __fish_ccs_complete
         set -e tokens_before_current[-1]
     end
 
-    set -l script_file (status filename)
-    set -l repo_root (realpath (dirname $script_file)/../.. 2>/dev/null)
-    set -l repo_cli "$repo_root/dist/ccs.js"
-    if not test -f "$repo_cli"
-        set repo_cli "$repo_root/bin/ccs.js"
-    end
-    if test -f "$repo_cli"
-        node "$repo_cli" __complete --shell fish --current "$current" -- $tokens_before_current 2>/dev/null
-        return
-    end
-
     if command -sq ccs
         ccs __complete --shell fish --current "$current" -- $tokens_before_current 2>/dev/null
     end
diff --git a/scripts/completion/ccs.ps1 b/scripts/completion/ccs.ps1
index 0ec00e94..04051ead 100644
--- a/scripts/completion/ccs.ps1
+++ b/scripts/completion/ccs.ps1
@@ -6,16 +6,6 @@ function Invoke-CcsCompletionBackend {
         [string[]]$TokensBeforeCurrent
     )
 
-    $repoRoot = (Resolve-Path (Join-Path $PSScriptRoot '..\..')).Path
-    $repoCli = Join-Path $repoRoot 'dist\ccs.js'
-    if (-not (Test-Path $repoCli)) {
-        $repoCli = Join-Path $repoRoot 'bin\ccs.js'
-    }
-    if (Test-Path $repoCli) {
-        & node $repoCli __complete --shell powershell --current $CurrentWord -- @TokensBeforeCurrent 2>$null
-        return
-    }
-
     if (Get-Command ccs -ErrorAction SilentlyContinue) {
         & ccs __complete --shell powershell --current $CurrentWord -- @TokensBeforeCurrent 2>$null
     }
diff --git a/scripts/completion/ccs.zsh b/scripts/completion/ccs.zsh
index 97e59220..281da9e3 100644
--- a/scripts/completion/ccs.zsh
+++ b/scripts/completion/ccs.zsh
@@ -22,19 +22,6 @@ __ccs_completion_run() {
   local current="$1"
   shift || true
 
-  local script_path script_dir repo_root repo_cli
-  script_path="${(%):-%N}"
-  script_dir="${script_path:A:h}"
-  repo_root="${script_dir:h:h}"
-  repo_cli="${repo_root}/dist/ccs.js"
-  if [[ ! -f "${repo_cli}" ]]; then
-    repo_cli="${repo_root}/bin/ccs.js"
-  fi
-  if [[ -f "${repo_cli}" ]]; then
-    node "${repo_cli}" __complete --shell zsh --current "${current}" -- "$@" 2>/dev/null
-    return 0
-  fi
-
   if (( $+commands[ccs] )); then
     ccs __complete --shell zsh --current "${current}" -- "$@" 2>/dev/null
   fi
diff --git a/tests/unit/commands/shell-completion-command.test.ts b/tests/unit/commands/shell-completion-command.test.ts
index c8a285d9..86d2efd4 100644
--- a/tests/unit/commands/shell-completion-command.test.ts
+++ b/tests/unit/commands/shell-completion-command.test.ts
@@ -143,6 +143,27 @@ describe('shell-completion command', () => {
     );
   });
 
+  it('completion adapters only delegate to the ccs command on PATH', () => {
+    const completionScripts = [
+      '../../../scripts/completion/ccs.bash',
+      '../../../scripts/completion/ccs.zsh',
+      '../../../scripts/completion/ccs.fish',
+      '../../../scripts/completion/ccs.ps1',
+    ];
+
+    for (const scriptPath of completionScripts) {
+      const script = readFileSync(join(import.meta.dir, scriptPath), 'utf8');
+
+      expect(script).not.toContain('../..');
+      expect(script).not.toContain('repo_root');
+      expect(script).not.toContain('repoRoot');
+      expect(script).not.toContain('repo_cli');
+      expect(script).not.toContain('repoCli');
+      expect(script).not.toContain('node ');
+      expect(script).not.toContain('& node');
+    }
+  });
+
   it('fish completion strips a duplicated partial token before delegating to __complete', () => {
     const fishScript = readFileSync(
       join(import.meta.dir, '../../../scripts/completion/ccs.fish'),