diff --git a/README.md b/README.md
index d8a08d1..3b548a4 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,24 @@
 # Agent CLI Tools
 
-Agent CLI Tools is a home for small Go CLIs that should be easy for AI agents to install and call as executable tools.
+Agent CLI Tools packages focused, agent-friendly command-line utilities as small Go binaries. Each tool is designed to be easy for an AI agent or automation runner to install, configure, call noninteractively, and parse.
+
+The project favors standalone executables with explicit flags, environment-based configuration, stable exit behavior, and optional JSON output. That keeps each tool safe to expose independently while still sharing one release pipeline and contribution model.
+
+## Install
+
+Install released tools with Homebrew:
+
+```bash
+brew install berrydev-ai/tap/slack-post
+```
+
+This README describes the current source tree. Homebrew installs the latest released binary; for unreleased source changes, use `make build` below.
+
+Command-specific usage and environment variables live with each tool:
+
+- [`slack-post`](cmd/slack-post/README.md) posts messages to Slack with `chat.postMessage`.
+
+Use the release archive or Docker examples below when Homebrew is not available.
 
 ## Shape
 
@@ -56,11 +74,11 @@ make test
 
 Each binary owns a README in its command path:
 
-- `cmd/slack-post/README.md`
+- [`cmd/slack-post/README.md`](cmd/slack-post/README.md)
 
 Each binary also owns its environment template next to that README:
 
-- `cmd/slack-post/.env.example`
+- [`cmd/slack-post/.env.example`](cmd/slack-post/.env.example)
 
 Leave secret values blank.
 
@@ -119,4 +137,4 @@ docker build --secret id=github_token,env=GITHUB_TOKEN .
 
 ## Tools
 
-- `slack-post`: see `cmd/slack-post/README.md`
+- [`slack-post`](cmd/slack-post/README.md): post messages to Slack from scripts, agents, and release checks.
diff --git a/cmd/slack-post/.env.example b/cmd/slack-post/.env.example
index ba3760c..bb67a4d 100644
--- a/cmd/slack-post/.env.example
+++ b/cmd/slack-post/.env.example
@@ -3,14 +3,14 @@
 # Copy values into the environment that runs this CLI. Do not commit real tokens.
 
 # Slack bot token used for chat.postMessage.
-SLACK_E2E_BOT_TOKEN=
+SLACK_POST_BOT_TOKEN=
 
 # Slack channel ID where slack-post sends messages, for example C0123456789.
-SLACK_E2E_TARGET_CHANNEL=
+SLACK_POST_TARGET_CHANNEL=
 
 # Optional default Slack member ID to mention before the message.
-SLACK_E2E_TARGET_BOT_MEMBER_ID=
+SLACK_POST_TARGET_BOT_MEMBER_ID=
 
 # Optional per-target member IDs. Used by `slack-post --target <name>`.
 # Example for `slack-post --target claude`:
-SLACK_E2E_CLAUDE_BOT_MEMBER_ID=
+SLACK_POST_CLAUDE_BOT_MEMBER_ID=
diff --git a/cmd/slack-post/README.md b/cmd/slack-post/README.md
index 1a9d463..e5c2e38 100644
--- a/cmd/slack-post/README.md
+++ b/cmd/slack-post/README.md
@@ -7,7 +7,7 @@
 ```bash
 slack-post --prompt "run the e2e test"
 slack-post --target claude --prompt "run the e2e test"
-slack-post --format json --target-member-id "$SLACK_E2E_TARGET_BOT_MEMBER_ID" "run the e2e test"
+slack-post --format json --target-member-id "$SLACK_POST_TARGET_BOT_MEMBER_ID" "run the e2e test"
 ```
 
 ## Required Inputs
@@ -16,16 +16,16 @@ Provide these values as flags or environment variables:
 
 | Flag | Environment variable | Description |
 | --- | --- | --- |
-| `--token` | `SLACK_E2E_BOT_TOKEN` | Slack bot token. |
-| `--channel` | `SLACK_E2E_TARGET_CHANNEL` | Slack channel ID. |
+| `--token` | `SLACK_POST_BOT_TOKEN` | Slack bot token. |
+| `--channel` | `SLACK_POST_TARGET_CHANNEL` | Slack channel ID. |
 | `--prompt` | none | Message text. Positional text is also accepted. |
 
 Optional mention target:
 
 | Flag | Environment variable | Description |
 | --- | --- | --- |
-| `--target-member-id`, `--member-id` | `SLACK_E2E_TARGET_BOT_MEMBER_ID` | Slack member ID to mention. |
-| `--target <name>` | `SLACK_E2E_<TARGET>_BOT_MEMBER_ID` | Resolves a named target, such as `SLACK_E2E_CLAUDE_BOT_MEMBER_ID`. |
+| `--target-member-id`, `--member-id` | `SLACK_POST_TARGET_BOT_MEMBER_ID` | Slack member ID to mention. |
+| `--target <name>` | `SLACK_POST_<TARGET>_BOT_MEMBER_ID` | Resolves a named target, such as `SLACK_POST_CLAUDE_BOT_MEMBER_ID`. |
 
 See the local `.env.example` for the maintained environment template.
 
diff --git a/internal/cli/slackpost/command.go b/internal/cli/slackpost/command.go
index e672507..308de64 100644
--- a/internal/cli/slackpost/command.go
+++ b/internal/cli/slackpost/command.go
@@ -79,10 +79,10 @@ func NewCommand(opts Options) *cobra.Command {
 		Example: strings.TrimSpace(`
 slack-post --prompt "run the e2e test"
 slack-post --target claude --prompt "run the e2e test"
-slack-post --format json --target-member-id "$SLACK_E2E_TARGET_BOT_MEMBER_ID" "run the e2e test"`),
+slack-post --format json --target-member-id "$SLACK_POST_TARGET_BOT_MEMBER_ID" "run the e2e test"`),
 		RunE: func(cmd *cobra.Command, args []string) error {
-			token = firstNonEmpty(token, opts.Env("SLACK_E2E_BOT_TOKEN"))
-			channel = firstNonEmpty(channel, opts.Env("SLACK_E2E_TARGET_CHANNEL"))
+			token = firstNonEmpty(token, opts.Env("SLACK_POST_BOT_TOKEN"))
+			channel = firstNonEmpty(channel, opts.Env("SLACK_POST_TARGET_CHANNEL"))
 
 			if prompt == "" && len(args) > 0 {
 				prompt = strings.Join(args, " ")
@@ -90,11 +90,11 @@ slack-post --format json --target-member-id "$SLACK_E2E_TARGET_BOT_MEMBER_ID" "r
 
 			var targetEnvName string
 			if targetMemberID == "" && target != "" {
-				targetEnvName = "SLACK_E2E_" + normalizeEnvPart(target) + "_BOT_MEMBER_ID"
+				targetEnvName = "SLACK_POST_" + normalizeEnvPart(target) + "_BOT_MEMBER_ID"
 				targetMemberID = opts.Env(targetEnvName)
 			}
 			if targetMemberID == "" {
-				targetMemberID = opts.Env("SLACK_E2E_TARGET_BOT_MEMBER_ID")
+				targetMemberID = opts.Env("SLACK_POST_TARGET_BOT_MEMBER_ID")
 			}
 
 			if format != "text" && format != "json" {
@@ -103,10 +103,10 @@ slack-post --format json --target-member-id "$SLACK_E2E_TARGET_BOT_MEMBER_ID" "r
 
 			var missing []string
 			if token == "" {
-				missing = append(missing, "--token or SLACK_E2E_BOT_TOKEN")
+				missing = append(missing, "--token or SLACK_POST_BOT_TOKEN")
 			}
 			if channel == "" {
-				missing = append(missing, "--channel or SLACK_E2E_TARGET_CHANNEL")
+				missing = append(missing, "--channel or SLACK_POST_TARGET_CHANNEL")
 			}
 			if prompt == "" {
 				missing = append(missing, "--prompt or positional message text")
@@ -134,9 +134,9 @@ slack-post --format json --target-member-id "$SLACK_E2E_TARGET_BOT_MEMBER_ID" "r
 
 	cmd.SetOut(opts.Out)
 	cmd.SetErr(opts.Err)
-	cmd.Flags().StringVar(&token, "token", "", "Slack bot token. Defaults to SLACK_E2E_BOT_TOKEN.")
-	cmd.Flags().StringVar(&channel, "channel", "", "Slack channel ID. Defaults to SLACK_E2E_TARGET_CHANNEL.")
-	cmd.Flags().StringVar(&target, "target", "", "Target name used to resolve SLACK_E2E_<TARGET>_BOT_MEMBER_ID.")
+	cmd.Flags().StringVar(&token, "token", "", "Slack bot token. Defaults to SLACK_POST_BOT_TOKEN.")
+	cmd.Flags().StringVar(&channel, "channel", "", "Slack channel ID. Defaults to SLACK_POST_TARGET_CHANNEL.")
+	cmd.Flags().StringVar(&target, "target", "", "Target name used to resolve SLACK_POST_<TARGET>_BOT_MEMBER_ID.")
 	cmd.Flags().StringVar(&targetMemberID, "target-member-id", "", "Slack member ID to mention, for example U123ABC456.")
 	cmd.Flags().StringVar(&targetMemberID, "member-id", "", "Alias for --target-member-id.")
 	cmd.Flags().StringVar(&prompt, "prompt", "", "Prompt/message text to send.")
diff --git a/internal/cli/slackpost/command_test.go b/internal/cli/slackpost/command_test.go
index d70081f..e3647f2 100644
--- a/internal/cli/slackpost/command_test.go
+++ b/internal/cli/slackpost/command_test.go
@@ -28,9 +28,9 @@ func TestCommandPostsPositionalPromptWithTargetEnv(t *testing.T) {
 	defer server.Close()
 
 	out, _, err := execute(t, map[string]string{
-		"SLACK_E2E_BOT_TOKEN":            "xoxb-test",
-		"SLACK_E2E_TARGET_CHANNEL":       "C123",
-		"SLACK_E2E_CLAUDE_BOT_MEMBER_ID": "UCLAUDE",
+		"SLACK_POST_BOT_TOKEN":            "xoxb-test",
+		"SLACK_POST_TARGET_CHANNEL":       "C123",
+		"SLACK_POST_CLAUDE_BOT_MEMBER_ID": "UCLAUDE",
 	}, "--url", server.URL, "--target", "claude", "--format", "json", "run", "the", "e2e", "test")
 	if err != nil {
 		t.Fatalf("expected success, got %v", err)
@@ -65,7 +65,7 @@ func TestCommandRequiresNoninteractiveInputs(t *testing.T) {
 	}
 
 	errText := err.Error()
-	for _, want := range []string{"--token or SLACK_E2E_BOT_TOKEN", "--channel or SLACK_E2E_TARGET_CHANNEL"} {
+	for _, want := range []string{"--token or SLACK_POST_BOT_TOKEN", "--channel or SLACK_POST_TARGET_CHANNEL"} {
 		if !strings.Contains(errText, want) {
 			t.Fatalf("error %q does not contain %q", errText, want)
 		}
@@ -80,8 +80,8 @@ func TestCommandReportsSlackAPIError(t *testing.T) {
 	defer server.Close()
 
 	_, _, err := execute(t, map[string]string{
-		"SLACK_E2E_BOT_TOKEN":      "xoxb-test",
-		"SLACK_E2E_TARGET_CHANNEL": "C123",
+		"SLACK_POST_BOT_TOKEN":      "xoxb-test",
+		"SLACK_POST_TARGET_CHANNEL": "C123",
 	}, "--url", server.URL, "--prompt", "hello")
 	if err == nil {
 		t.Fatal("expected Slack API error")