Files
buzz/desktop/tests
Taylor Ho a2d8be5efa feat(desktop-messages): keep agents addressed across messages (#6315)
**Category:** new-feature
**User Impact:** Users can keep selected agents addressed across
consecutive messages without retyping their handles.

**Problem:** Repeated conversations with agents require manually typing
the same mentions on every turn, which adds friction and makes
recipients easy to omit.

**Solution:** The composer can now keep agents automatically addressed
per channel, either from the mention controls or after a successful
inline mention. Addressed agents remain visible in the toolbar, apply to
channel threads, survive send failures safely, and never cross community
boundaries.

## Changes

<details>
<summary>File changes</summary>

**desktop/src-tauri/src/events/message_tags.rs**  
Preserves the automatic-address marker on validated mention reference
tags.

**desktop/src/features/channels/ui/ChannelPane.tsx**  
Wires the appropriate channel, thread, inbox, or forum composer context
without leaking audiences across surfaces.

**desktop/src/features/communities/useCommunityInit.ts**  
Clears composer audience state when the active community changes.

**desktop/src/features/forum/ui/ForumComposer.tsx**  
Wires the appropriate channel, thread, inbox, or forum composer context
without leaking audiences across surfaces.

**desktop/src/features/forum/ui/ForumComposerAutocompletes.tsx**  
Wires the appropriate channel, thread, inbox, or forum composer context
without leaking audiences across surfaces.

**desktop/src/features/home/ui/InboxDetailPane.tsx**  
Wires the appropriate channel, thread, inbox, or forum composer context
without leaking audiences across surfaces.

**desktop/src/features/messages/lib/agentAddressMention.d.mts**  
Defines helpers and types for marked automatic-address mention tags.

**desktop/src/features/messages/lib/agentAddressMention.mjs**  
Defines helpers and types for marked automatic-address mention tags.

**desktop/src/features/messages/lib/agentAddressMention.test.mjs**  
Covers the automatic-address behavior and its failure, keyboard, layout,
or persistence boundaries.

**desktop/src/features/messages/lib/applyEditTagOverlay.mjs**  
Preserves automatic-address metadata when edited message tags are
overlaid.

**desktop/src/features/messages/lib/applyEditTagOverlay.test.mjs**  
Covers the automatic-address behavior and its failure, keyboard, layout,
or persistence boundaries.


**desktop/src/features/messages/lib/autoPinMentionedAgentsPreference.test.mjs**
Covers the automatic-address behavior and its failure, keyboard, layout,
or persistence boundaries.


**desktop/src/features/messages/lib/autoPinMentionedAgentsPreference.ts**
Stores the preference that keeps explicitly mentioned agents addressed
for later messages.

**desktop/src/features/messages/lib/extractMentionPersonas.ts**  
Separates persona recipients from the composer mention orchestration.

**desktop/src/features/messages/lib/persistentAgentAudience.test.mjs**  
Covers the automatic-address behavior and its failure, keyboard, layout,
or persistence boundaries.

**desktop/src/features/messages/lib/persistentAgentAudience.ts**  
Maintains bounded, in-memory, channel-scoped automatic agent audiences.

**desktop/src/features/messages/lib/useMentionSelection.ts**  
Centralizes mention picker selection state and agent-first selection
behavior.

**desktop/src/features/messages/lib/useMentions.ts**  
Exposes explicit picker origins and selection controls while preserving
inline mention behavior.

**desktop/src/features/messages/ui/ComposerAddressControls.test.mjs**  
Covers the automatic-address behavior and its failure, keyboard, layout,
or persistence boundaries.

**desktop/src/features/messages/ui/ComposerAddressControls.tsx**  
Renders compact addressed-agent avatars and the automatic-mention
management entry point.

**desktop/src/features/messages/ui/MentionAutocomplete.test.mjs**  
Covers the automatic-address behavior and its failure, keyboard, layout,
or persistence boundaries.

**desktop/src/features/messages/ui/MentionAutocomplete.tsx**  
Adds automatic-mention controls and options to the existing mention
picker.

**desktop/src/features/messages/ui/MessageAgentAddressPrefix.tsx**  
Shows which agents were automatically addressed on a sent message.

**desktop/src/features/messages/ui/MessageComposer.tsx**  
Integrates automatic audiences, picker controls, accessible feedback,
shortcuts, and send behavior.

**desktop/src/features/messages/ui/MessageComposer.types.ts**  
Defines the simplified channel audience context shared by composer
hosts.

**desktop/src/features/messages/ui/MessageComposerToolbar.tsx**  
Places automatic-address controls in the composer toolbar without
crowding narrow layouts.

**desktop/src/features/messages/ui/MessageRow.tsx**  
Displays automatic-address metadata alongside sent message content.

**desktop/src/features/messages/ui/MessageThreadPanel.tsx**  
Wires the appropriate channel, thread, inbox, or forum composer context
without leaking audiences across surfaces.

**desktop/src/features/messages/ui/composerAgentKeyboard.test.mjs**  
Covers the automatic-address behavior and its failure, keyboard, layout,
or persistence boundaries.


**desktop/src/features/messages/ui/persistentAgentAudienceHosts.test.mjs**
Covers the automatic-address behavior and its failure, keyboard, layout,
or persistence boundaries.

**desktop/src/features/messages/ui/useAddressMentionPulse.test.mjs**  
Covers the automatic-address behavior and its failure, keyboard, layout,
or persistence boundaries.

**desktop/src/features/messages/ui/useAddressMentionPulse.ts**  
Provides success and failure animation signals for addressed-agent
controls.

**desktop/src/features/messages/ui/useAgentAddressLockPicker.test.mjs**
Covers the automatic-address behavior and its failure, keyboard, layout,
or persistence boundaries.

**desktop/src/features/messages/ui/useAgentAddressLockPicker.ts**  
Coordinates adding, removing, and announcing automatically addressed
agents.

**desktop/src/features/messages/ui/useAlwaysAddressShortcut.ts**  
Implements the platform-aware shortcut for toggling automatic
addressing.

**desktop/src/features/messages/ui/useAutoPinMentionedAgents.ts**  
Promotes successfully sent inline agent mentions and provides a single
undoable notification.

**desktop/src/features/messages/ui/useComposerMentionPicker.ts**  
Opens the mention picker without rewriting the current draft.


**desktop/src/features/messages/ui/useMentionSendFlow.helpers.test.mjs**
Covers the automatic-address behavior and its failure, keyboard, layout,
or persistence boundaries.

**desktop/src/features/messages/ui/useMentionSendFlow.helpers.ts**  
Merges automatic and inline recipients, marks outgoing tags, and
restores failed sends safely.

**desktop/src/features/messages/ui/useMentionSendFlow.ts**  
Merges automatic and inline recipients, marks outgoing tags, and
restores failed sends safely.


**desktop/src/features/messages/ui/usePersistentAgentMentionHydration.ts**
Removes the prior draft-text hydration approach now that automatic
audiences stay at composer ingress.

**desktop/src/features/settings/ui/AgentsSettingsPanel.tsx**  
Replaces the old global behavior with explicit composer-level
automatic-mention controls.

**desktop/src/features/settings/ui/PreventSleepSettingsCard.tsx**  
Replaces the old global behavior with explicit composer-level
automatic-mention controls.

**desktop/src/shared/lib/keyboard-shortcuts.ts**  
Defines the user-facing automatic-address keyboard shortcut label.

**desktop/src/shared/ui/VideoReviewCommentMarkdown.tsx**  
Allows automatic-address prefixes to compose with video review
timecodes.

**desktop/tests/e2e/persistent-agent-audience.spec.ts**  
Covers the automatic-address behavior and its failure, keyboard, layout,
or persistence boundaries.

</details>

## Reproduction Steps

1. Open a channel with one or more agents and open the mention picker
from the composer.
2. Select an agent for automatic mentions, then send several messages
without retyping the handle; confirm the agent remains in the composer
control and receives each message.
3. Mention another agent inline, send successfully, and confirm the
agent becomes automatically addressed; use the notification's Undo
action to reverse it.
4. Open a thread in the same channel and confirm the same addressed
agents are available there.
5. Remove an agent from the composer control and confirm later messages
stop addressing it.
6. Switch communities and confirm addressed agents do not carry into the
other community.

## Screenshots

All states below use the dark Buzz theme with a selected lilac accent.

### Addressed composer

Selected agents stay visible at the composer ingress without adding
handles to the draft.

![Two automatically addressed agents in the dark composer with a lilac
accent](https://raw.githubusercontent.com/block/buzz/74c2cbbd80ed630a0c6e00c420505a691bd4994a/pr-6315--01-addressed-composer.png)

### Open mention menu

The @ ingress opens the existing mention menu and shows which agents are
already addressed.

![Open mention menu with automatically addressed agents
highlighted](https://raw.githubusercontent.com/block/buzz/74c2cbbd80ed630a0c6e00c420505a691bd4994a/pr-6315--02-open-mention-menu.png)

### Mention options

The inline options pane controls whether a successful one-time agent
mention carries into later messages.

![Automatic mention options expanded above the mention
menu](https://raw.githubusercontent.com/block/buzz/74c2cbbd80ed630a0c6e00c420505a691bd4994a/pr-6315--03-mention-options.png)

### Agent settings

The same preference is available in **Settings → Agents →
Conversations**.

![Automatic agent mentions preference in the Agents settings
pane](https://raw.githubusercontent.com/block/buzz/74c2cbbd80ed630a0c6e00c420505a691bd4994a/pr-6315--04-agent-settings.png)

---------

Signed-off-by: Taylor Ho <taylorkmho@gmail.com>
Co-authored-by: Rizz <302abe414ca6e3134763d2539bfcf145aea2a63fe5f8455204ed602fd40cf381@buzz.block.builderlab.xyz>
Co-authored-by: Carl <acda9e433d19dcd0e6b6840f7f4b98f3a56f1fab98049d444c087019e6d36560@buzz.block.builderlab.xyz>
2026-08-21 22:04:53 -07:00
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