feat(copilot): add rtk init --agent copilot support

.github/hooks/rtk-rewrite.json

@@ -3,7 +3,7 @@
     "PreToolUse": [
       {
         "type": "command",
-        "command": "rtk hook",
+        "command": "rtk hook copilot",
         "cwd": ".",
         "timeout": 5
       }

CHANGELOG.md

@@ -5,6 +5,16 @@ All notable changes to rtk (Rust Token Killer) will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Features
+
+* `rtk init --agent copilot` — one-command setup for GitHub Copilot (VS Code + CLI): installs `.github/copilot-instructions.md` and `.github/hooks/rtk-rewrite.json` PreToolUse hook; idempotent; `--uninstall --agent copilot` removes both
+
+### Bug Fixes
+
+* **hook:** `rtk hook copilot` now correctly registered in `RTK_META_COMMANDS` — bare `rtk hook` no longer falls through to passthrough mode (exit 127); `.github/hooks/rtk-rewrite.json` corrected to invoke `rtk hook copilot`
+
 ## [0.33.0-rc.54](https://github.com/rtk-ai/rtk/compare/v0.32.0-rc.54...v0.33.0-rc.54) (2026-03-24)
 
 

hooks/copilot-rtk-awareness.md

@@ -7,7 +7,7 @@
 The `.github/copilot-instructions.md` file is loaded at session start by both Copilot CLI and VS Code Copilot Chat.
 It instructs Copilot to prefix commands with `rtk` automatically.
 
-The `.github/hooks/rtk-rewrite.json` hook adds a `PreToolUse` safety net via `rtk hook` —
+The `.github/hooks/rtk-rewrite.json` hook adds a `PreToolUse` safety net via `rtk hook copilot` —
 a cross-platform Rust binary that intercepts raw bash tool calls and rewrites them.
 No shell scripts, no `jq` dependency, works on Windows natively.
 
@@ -33,21 +33,21 @@ which rtk       # Verify correct binary path
 
 ## How the hook works
 
-`rtk hook` reads `PreToolUse` JSON from stdin, detects the agent format, and responds appropriately:
+`rtk hook copilot` reads `PreToolUse` JSON from stdin, detects the agent format, and responds appropriately:
 
 **VS Code Copilot Chat** (supports `updatedInput` — transparent rewrite, no denial):
-1. Agent runs `git status` → `rtk hook` intercepts via `PreToolUse`
-2. `rtk hook` detects VS Code format (`tool_name`/`tool_input` keys)
+1. Agent runs `git status` → `rtk hook copilot` intercepts via `PreToolUse`
+2. `rtk hook copilot` detects VS Code format (`tool_name`/`tool_input` keys)
 3. Returns `hookSpecificOutput.updatedInput.command = "rtk git status"`
 4. Agent runs the rewritten command silently — no denial, no retry
 
 **GitHub Copilot CLI** (deny-with-suggestion — CLI ignores `updatedInput` today, see [issue #2013](https://github.com/github/copilot-cli/issues/2013)):
-1. Agent runs `git status` → `rtk hook` intercepts via `PreToolUse`
-2. `rtk hook` detects Copilot CLI format (`toolName`/`toolArgs` keys)
+1. Agent runs `git status` → `rtk hook copilot` intercepts via `PreToolUse`
+2. `rtk hook copilot` detects Copilot CLI format (`toolName`/`toolArgs` keys)
 3. Returns `permissionDecision: deny` with reason: `"Token savings: use 'rtk git status' instead"`
 4. Copilot reads the reason and re-runs `rtk git status`
 
-When Copilot CLI adds `updatedInput` support, only `rtk hook` needs updating — no config changes.
+When Copilot CLI adds `updatedInput` support, only `rtk hook copilot` needs updating — no config changes.
 
 ## Integration comparison
 

hooks/test-copilot-rtk-rewrite.sh

@@ -53,7 +53,7 @@ test_deny() {
   TOTAL=$((TOTAL + 1))
 
   local output
-  output=$(copilot_bash_input "$input_cmd" | "$RTK" hook 2>/dev/null) || true
+  output=$(copilot_bash_input "$input_cmd" | "$RTK" hook copilot 2>/dev/null) || true
 
   local decision reason
   decision=$(echo "$output" | jq -r '.permissionDecision // empty' 2>/dev/null)
@@ -79,7 +79,7 @@ test_vscode_rewrite() {
   TOTAL=$((TOTAL + 1))
 
   local output
-  output=$(vscode_bash_input "$input_cmd" | "$RTK" hook 2>/dev/null) || true
+  output=$(vscode_bash_input "$input_cmd" | "$RTK" hook copilot 2>/dev/null) || true
 
   local decision updated_cmd
   decision=$(echo "$output" | jq -r '.hookSpecificOutput.permissionDecision // empty' 2>/dev/null)
@@ -104,7 +104,7 @@ test_allow() {
   TOTAL=$((TOTAL + 1))
 
   local output
-  output=$(echo "$input" | "$RTK" hook 2>/dev/null) || true
+  output=$(echo "$input" | "$RTK" hook copilot 2>/dev/null) || true
 
   if [ -z "$output" ]; then
     printf "  ${GREEN}PASS${RESET} %s ${DIM}→ (allow)${RESET}\n" "$description"
@@ -217,7 +217,7 @@ echo "--- Output format ---"
 
 # Copilot CLI output format
 TOTAL=$((TOTAL + 1))
-raw_output=$(copilot_bash_input "git status" | "$RTK" hook 2>/dev/null)
+raw_output=$(copilot_bash_input "git status" | "$RTK" hook copilot 2>/dev/null)
 
 if echo "$raw_output" | jq . >/dev/null 2>&1; then
   printf "  ${GREEN}PASS${RESET} Copilot CLI: output is valid JSON\n"
@@ -249,7 +249,7 @@ fi
 
 # VS Code output format
 TOTAL=$((TOTAL + 1))
-vscode_output=$(vscode_bash_input "git status" | "$RTK" hook 2>/dev/null)
+vscode_output=$(vscode_bash_input "git status" | "$RTK" hook copilot 2>/dev/null)
 
 if echo "$vscode_output" | jq . >/dev/null 2>&1; then
   printf "  ${GREEN}PASS${RESET} VS Code: output is valid JSON\n"