diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2c47e28..253259c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -33,14 +33,11 @@ jobs:
       - name: Type check
         run: deno task check
 
-      - name: Run tests
-        run: deno task test
+      - name: Run tests (with coverage)
+        run: deno task test:coverage
 
       - name: Generate coverage report
-        if: success()
-        run: |
-          deno test --allow-read --allow-write --allow-env --allow-run --allow-sys --coverage=.coverage
-          deno coverage --detailed .coverage
+        run: deno task coverage
 
   build:
     runs-on: ubuntu-latest
diff --git a/.gitignore b/.gitignore
index cbe61d7..b816b3e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -28,3 +28,6 @@ Thumbs.db
 # test coverage
 .coverage/
 cov/
+
+# deepwork session state
+.slim/deepwork/
diff --git a/.ignore b/.ignore
new file mode 100644
index 0000000..a704baf
--- /dev/null
+++ b/.ignore
@@ -0,0 +1,2 @@
+!.slim/deepwork/
+!.slim/deepwork/**
diff --git a/deno.json b/deno.json
index d4e3782..23336cc 100644
--- a/deno.json
+++ b/deno.json
@@ -9,7 +9,8 @@
     "fmt:check": "deno fmt --check",
     "lint": "deno lint",
     "test": "deno test --allow-read --allow-write --allow-env --allow-run --allow-sys",
-    "coverage": "deno coverage --detailed",
+    "test:coverage": "deno test --allow-read --allow-write --allow-env --allow-run --allow-sys --coverage=.coverage",
+    "coverage": "deno coverage --detailed .coverage",
     "build": "deno compile --output dist/stackctl src/main.ts",
     "build:darwin:x64": "deno compile --target x86_64-apple-darwin --output dist/stackctl-darwin-x64 src/main.ts",
     "build:darwin:arm64": "deno compile --target aarch64-apple-darwin --output dist/stackctl-darwin-arm64 src/main.ts",
diff --git a/src/cli/mod.ts b/src/cli/mod.ts
index 058f749..0d44754 100644
--- a/src/cli/mod.ts
+++ b/src/cli/mod.ts
@@ -1487,9 +1487,8 @@ export function buildCli(): Command {
   cli.command("plan", "Produce a deterministic plan of what an operation would do.")
     .arguments("<operation:string>")
     .option("--profile <name:string>", "Use a specific profile.")
-    .option("--stacks <names:string>", "Comma-separated list of stack names.", {
-      complete: completeStackNames,
-    } as any)
+    .option("--stacks <names:string>", "Comma-separated list of stack names.")
+    .complete("stacks", completeStackNames)
     .option("--override <files:string>", "Comma-separated list of override files.")
     .option("--json", "Output machine-readable JSON.")
     .description(