nonbinary.computer
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oppi.li/claude-code
source dump of claude code
oppi.li
1import type { Attachment } from 'src/utils/attachments.js'
2import type { Message, NormalizedMessage } from '../../types/message.js'
3
4/**
5 * Attachment types that AttachmentMessage renders as `null` unconditionally
6 * (no visible output regardless of runtime state). Messages.tsx filters these
7 * out BEFORE the render cap / message count so invisible entries don't consume
8 * the 200-message render budget (CC-724).
9 *
10 * Sync is enforced by TypeScript: AttachmentMessage's switch `default:` branch
11 * asserts `attachment.type satisfies NullRenderingAttachmentType`. Adding a new
12 * Attachment type without either a case or an entry here will fail typecheck.
13 */
14const NULL_RENDERING_TYPES = [
15 'hook_success',
16 'hook_additional_context',
17 'hook_cancelled',
18 'command_permissions',
19 'agent_mention',
20 'budget_usd',
21 'critical_system_reminder',
22 'edited_image_file',
23 'edited_text_file',
24 'opened_file_in_ide',
25 'output_style',
26 'plan_mode',
27 'plan_mode_exit',
28 'plan_mode_reentry',
29 'structured_output',
30 'team_context',
31 'todo_reminder',
32 'context_efficiency',
33 'deferred_tools_delta',
34 'mcp_instructions_delta',
35 'companion_intro',
36 'token_usage',
37 'ultrathink_effort',
38 'max_turns_reached',
39 'task_reminder',
40 'auto_mode',
41 'auto_mode_exit',
42 'output_token_usage',
43 'pen_mode_enter',
44 'pen_mode_exit',
45 'verify_plan_reminder',
46 'current_session_memory',
47 'compaction_reminder',
48 'date_change',
49] as const satisfies readonly Attachment['type'][]
50
51export type NullRenderingAttachmentType = (typeof NULL_RENDERING_TYPES)[number]
52
53const NULL_RENDERING_ATTACHMENT_TYPES: ReadonlySet<Attachment['type']> =
54 new Set(NULL_RENDERING_TYPES)
55
56/**
57 * True when this message is an attachment that AttachmentMessage renders as
58 * null with no visible output. Messages.tsx filters these out before counting
59 * and before applying the 200-message render cap, so invisible hook
60 * attachments (hook_success, hook_additional_context, hook_cancelled) don't
61 * inflate the "N messages" count or eat into the render budget (CC-724).
62 */
63export function isNullRenderingAttachment(
64 msg: Message | NormalizedMessage,
65): boolean {
66 return (
67 msg.type === 'attachment' &&
68 NULL_RENDERING_ATTACHMENT_TYPES.has(msg.attachment.type)
69 )
70}