feat(slack): add [slack].streaming toggle (send-once mode)

charts/openab/templates/configmap.yaml

@@ -138,6 +138,10 @@ data:
     {{- if and (hasKey ($cfg.slack | default dict) "assistantMode") (not ($cfg.slack).assistantMode) }}
     assistant_mode = false
     {{- end }}
+    {{- /* streaming: master switch; false → send-once (no native, no post+edit) */ -}}
+    {{- if and (hasKey ($cfg.slack | default dict) "streaming") (not ($cfg.slack).streaming) }}
+    streaming = false
+    {{- end }}
     {{- end }}
 
     [agent]
@@ -176,6 +180,10 @@ data:
     {{- end }}
     tool_display = {{ ($cfg.reactions).toolDisplay | toJson }}
     {{- end }}
+    {{- /* narrationDisplay: true → keep inter-tool narration in send-once (default false → final answer block only) */ -}}
+    {{- if ($cfg.reactions).narrationDisplay }}
+    narration_display = true
+    {{- end }}
     {{- if ($cfg.stt).enabled }}
     {{- if not ($cfg.stt).apiKey }}
     {{ fail (printf "agents.%s.stt.apiKey is required when stt.enabled=true" $name) }}

charts/openab/tests/configmap_test.yaml

@@ -180,3 +180,49 @@ tests:
       - notMatchRegex:
           path: data["config.toml"]
           pattern: 'assistant_mode'
+
+  - it: renders slack streaming = false when explicitly disabled
+    set:
+      agents.kiro.slack.enabled: true
+      agents.kiro.slack.botToken: xoxb-x
+      agents.kiro.slack.appToken: xapp-y
+      agents.kiro.slack.streaming: false
+    asserts:
+      - matchRegex:
+          path: data["config.toml"]
+          pattern: 'streaming = false'
+
+  - it: does not render slack streaming when enabled (Rust default true)
+    set:
+      agents.kiro.slack.enabled: true
+      agents.kiro.slack.botToken: xoxb-x
+      agents.kiro.slack.appToken: xapp-y
+      agents.kiro.slack.streaming: true
+    asserts:
+      - notMatchRegex:
+          path: data["config.toml"]
+          pattern: 'streaming = '
+
+  - it: renders reactions narration_display = true when explicitly enabled
+    set:
+      agents.kiro.reactions.narrationDisplay: true
+    asserts:
+      - matchRegex:
+          path: data["config.toml"]
+          pattern: 'narration_display = true'
+
+  - it: does not render reactions narration_display when off (Rust default false)
+    set:
+      agents.kiro.reactions.narrationDisplay: false
+    asserts:
+      - notMatchRegex:
+          path: data["config.toml"]
+          pattern: 'narration_display = '
+
+  - it: does not render reactions narration_display when key absent (Rust default false)
+    set:
+      agents.kiro.reactions.enabled: true
+    asserts:
+      - notMatchRegex:
+          path: data["config.toml"]
+          pattern: 'narration_display = '

charts/openab/values.yaml

@@ -302,6 +302,12 @@ agents:
       # AI app with the `assistant:write` scope (plus chat:write). Default: true — set to
       # false for non-AI Slack apps (without assistant:write) to keep emoji-reaction status.
       assistantMode: true
+      # streaming: master switch for live reply streaming. Default true. Set
+      # false to always post a single final message (send-once) — no native
+      # streaming, no post+edit placeholder — regardless of assistantMode.
+      # Useful in multi-agent threads to avoid streamed-message edit states
+      # re-firing app_mention.
+      streaming: true
       # allowAllChannels/allowAllUsers: same auto-infer logic as discord
       allowedChannels: []  # empty + no allowAllChannels → allow all (auto-inferred)
       allowedUsers: []     # empty + no allowAllUsers → allow all (auto-inferred)
@@ -346,6 +352,11 @@ agents:
       # compact: show count summary (e.g. ✅ 3 · 🔧 1 tool(s))
       # full: show complete tool titles (for debugging)
       # none: hide tool lines entirely
+      # narrationDisplay: default false. In send-once mode, deliver ONLY the final
+      # answer block (text after the last tool call); inter-tool narration is
+      # dropped. Set true to keep the full text. Platform-agnostic (Slack
+      # streaming=false, multi-bot threads, gateway). No effect while streaming.
+      # narrationDisplay: false
     stt:
       enabled: false
       apiKey: ""

config.toml.example

@@ -39,6 +39,11 @@ allowed_channels = ["1234567890"]       # ↑ omitted + non-empty list → auto-
 #                                       # post+edit + emoji reactions. Requires the Slack app to be
 #                                       # an AI app with the `assistant:write` scope (plus chat:write).
 #                                       # Set false for non-AI Slack apps to keep emoji reactions.
+# streaming = true                     # default true: stream the reply live (native or post+edit).
+#                                       # Set false to always post a single final message (send-once),
+#                                       # regardless of assistant_mode — useful in multi-agent threads
+#                                       # to avoid streamed-edit states re-firing app_mention.
+#                                       # What a send-once message *contains* is controlled by [reactions] narration_display.
 
 # [gateway]
 # url = "ws://openab-gateway:8080/ws"  # WebSocket URL of the custom gateway
@@ -172,6 +177,12 @@ remove_after_reply = false
 #                                       # Controls how tool calls appear in the final message.
 #                                       # Applies to both assistant_mode and post+edit mode.
 #                                       # Set "none" to hide the tool summary entirely.
+# narration_display = false             # default false: in send-once mode, deliver ONLY the final
+#                                       # answer block (text after the last tool call); inter-tool
+#                                       # narration ("let me check… / now reading X") is dropped.
+#                                       # Set true to keep the full text. Platform-agnostic (Slack
+#                                       # streaming=false, multi-bot threads, gateway). No effect
+#                                       # while streaming — streamed text is shown live as produced.
 
 [reactions.emojis]
 queued = "👀"