feat(rspec): add RSpec test runner with compact output (Rails/Ruby)

.claude/hooks/rtk-rewrite.sh

@@ -186,6 +186,16 @@ elif echo "$MATCH_CMD" | grep -qE '^pip[[:space:]]+(list|outdated|install|show)(
 elif echo "$MATCH_CMD" | grep -qE '^uv[[:space:]]+pip[[:space:]]+(list|outdated|install|show)([[:space:]]|$)'; then
   REWRITTEN="${ENV_PREFIX}$(echo "$CMD_BODY" | sed 's/^uv pip /rtk pip /')"
 
+# --- Ruby / RSpec ---
+elif echo "$MATCH_CMD" | grep -qE '^rspec([[:space:]]|$)'; then
+  REWRITTEN="${ENV_PREFIX}$(echo "$CMD_BODY" | sed 's/^rspec/rtk rspec/')"
+elif echo "$MATCH_CMD" | grep -qE '^bin/rspec([[:space:]]|$)'; then
+  REWRITTEN="${ENV_PREFIX}$(echo "$CMD_BODY" | sed 's|^bin/rspec|rtk rspec|')"
+elif echo "$MATCH_CMD" | grep -qE '^bundle[[:space:]]+exec[[:space:]]+rspec([[:space:]]|$)'; then
+  REWRITTEN="${ENV_PREFIX}$(echo "$CMD_BODY" | sed 's/^bundle exec rspec/rtk rspec/')"
+elif echo "$MATCH_CMD" | grep -qE '^bundle[[:space:]]+exec[[:space:]]+rails[[:space:]]+spec([[:space:]]|$)'; then
+  REWRITTEN="${ENV_PREFIX}$(echo "$CMD_BODY" | sed 's/^bundle exec rails spec/rtk rspec/')"
+
 # --- Go tooling ---
 elif echo "$MATCH_CMD" | grep -qE '^go[[:space:]]+test([[:space:]]|$)'; then
   REWRITTEN="${ENV_PREFIX}$(echo "$CMD_BODY" | sed 's/^go test/rtk go test/')"

mise.toml

@@ -0,0 +1,2 @@
+[tools]
+rust = "latest"

src/main.rs

@@ -36,6 +36,7 @@ mod prettier_cmd;
 mod prisma_cmd;
 mod pytest_cmd;
 mod read;
+mod rspec_cmd;
 mod ruff_cmd;
 mod runner;
 mod summary;
@@ -498,6 +499,13 @@ enum Commands {
         args: Vec<String>,
     },
 
+    /// RSpec test runner with compact output (Rails/Ruby)
+    Rspec {
+        /// RSpec arguments (e.g., spec/models, --tag focus)
+        #[arg(trailing_var_arg = true, allow_hyphen_values = true)]
+        args: Vec<String>,
+    },
+
     /// Pip package manager with compact output (auto-detects uv)
     Pip {
         /// Pip arguments (e.g., list, outdated, install)
@@ -1383,6 +1391,10 @@ fn main() -> Result<()> {
             pytest_cmd::run(&args, cli.verbose)?;
         }
 
+        Commands::Rspec { args } => {
+            rspec_cmd::run(&args, cli.verbose)?;
+        }
+
         Commands::Pip { args } => {
             pip_cmd::run(&args, cli.verbose)?;
         }