Convert 6 more predicate assertions to fabro_snapshot

Replace predicates::str::contains checks with full snapshots in
single-command tests: repo deinit failure, repo init help, secret
get/rm missing key, exec missing API key, config show missing workflow.

The remaining predicate usages are in multi-step CRUD tests and legacy
config tests where programmatic assertions are still the better fit.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

lib/crates/fabro-cli/tests/it/cmd/config.rs

@@ -505,13 +505,16 @@ fn config_show_missing_run_config_errors() {
     let context = test_context!();
     let project = setup_config_show_fixture(&context);
 
-    context
-        .command()
-        .current_dir(project.path())
-        .args(["config", "show", "missing.toml"])
-        .assert()
-        .failure()
-        .stderr(predicate::str::contains("Workflow not found"));
+    let mut cmd = context.command();
+    cmd.current_dir(project.path());
+    cmd.args(["config", "show", "missing.toml"]);
+    fabro_snapshot!(context.filters(), cmd, @"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    ----- stderr -----
+    error: Workflow not found: missing.toml
+    ");
 }
 
 #[test]

lib/crates/fabro-cli/tests/it/cmd/exec.rs

@@ -1,5 +1,4 @@
 use fabro_test::{fabro_snapshot, test_context};
-use predicates::prelude::*;
 
 #[test]
 fn invalid_permissions() {
@@ -43,9 +42,13 @@ fn exec_missing_api_key_exits_with_error() {
     cmd.env_clear();
     cmd.env("HOME", &context.home_dir);
     cmd.current_dir(&context.temp_dir);
-    cmd.assert()
-        .failure()
-        .stderr(predicate::str::contains("API key not set"));
+    fabro_snapshot!(context.filters(), cmd, @"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    ----- stderr -----
+    error: API key not set for provider 'anthropic'
+    ");
 }
 
 #[test]

lib/crates/fabro-cli/tests/it/cmd/repo.rs

@@ -1,5 +1,4 @@
 use fabro_test::{fabro_snapshot, test_context};
-use predicates;
 
 fn init_git_repo(path: &std::path::Path) {
     std::process::Command::new("git")
@@ -76,13 +75,16 @@ fn test_repo_deinit_fails_when_not_initialized() {
     let context = test_context!();
     init_git_repo(&context.temp_dir);
 
-    context
-        .repo()
-        .arg("deinit")
-        .current_dir(&context.temp_dir)
-        .assert()
-        .failure()
-        .stderr(predicates::str::contains("not initialized"));
+    let mut cmd = context.repo();
+    cmd.arg("deinit");
+    cmd.current_dir(&context.temp_dir);
+    fabro_snapshot!(context.filters(), cmd, @"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    ----- stderr -----
+    error: not initialized — fabro.toml not found
+    ");
 }
 
 #[test]
@@ -111,10 +113,23 @@ fn test_repo_init_skill_installs_skill_files() {
 #[test]
 fn test_repo_init_help_does_not_show_skill() {
     let context = test_context!();
-    let out = context.repo().args(["init", "--help"]).assert().success();
-    let stdout = String::from_utf8(out.get_output().stdout.clone()).unwrap();
-    assert!(
-        !stdout.contains("--skill"),
-        "--skill should be hidden from help"
-    );
+    let mut cmd = context.repo();
+    cmd.args(["init", "--help"]);
+    fabro_snapshot!(context.filters(), cmd, @"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    Initialize a new project
+
+    Usage: fabro repo init [OPTIONS]
+
+    Options:
+          --debug                      Enable DEBUG-level logging (default is INFO) [env: FABRO_DEBUG=]
+          --no-upgrade-check           Disable automatic upgrade check [env: FABRO_NO_UPGRADE_CHECK=true]
+          --quiet                      Suppress non-essential output [env: FABRO_QUIET=]
+          --verbose                    Enable verbose output [env: FABRO_VERBOSE=]
+          --storage-dir <STORAGE_DIR>  Storage directory (default: ~/.fabro) [env: FABRO_STORAGE_DIR=[STORAGE_DIR]]
+      -h, --help                       Print help
+    ----- stderr -----
+    ");
 }

lib/crates/fabro-cli/tests/it/cmd/secret.rs

@@ -104,25 +104,29 @@ fn test_secret_list_alias_ls() {
 #[test]
 fn test_secret_get_missing_key() {
     let context = test_context!();
-
-    context
-        .secret()
-        .args(["get", "NOPE"])
-        .assert()
-        .failure()
-        .stderr(predicates::str::contains("secret not found"));
+    let mut cmd = context.secret();
+    cmd.args(["get", "NOPE"]);
+    fabro_snapshot!(context.filters(), cmd, @"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    ----- stderr -----
+    error: secret not found: NOPE
+    ");
 }
 
 #[test]
 fn test_secret_rm_missing_key() {
     let context = test_context!();
-
-    context
-        .secret()
-        .args(["rm", "NOPE"])
-        .assert()
-        .failure()
-        .stderr(predicates::str::contains("secret not found"));
+    let mut cmd = context.secret();
+    cmd.args(["rm", "NOPE"]);
+    fabro_snapshot!(context.filters(), cmd, @"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    ----- stderr -----
+    error: secret not found: NOPE
+    ");
 }
 
 #[test]