Refactor conversation folding/thread-feed and thread event bus

[soorya-u]

Summary

• Simplify fold/thread-feed conversation logic in shared/utils, with new/expanded test coverage
• Add ephemeral-vs-persisted chunk stamping to the CLI thread event bus (apps/cli/src/queue/bus.ts), with new tests
• Reorganize auth UI components and move show.tsx into components/helpers

Test plan

• turbo check:types passes
• knip passes
• syncpack lint passes
• vitest run and bun test:unit pass (104 tests passed, 1 skipped)

🤖 Generated with Claude Code

Summary by CodeRabbit

• New Features

  • Improved live conversation updates with more reliable ordering, replay, and incremental loading.
  • Tool activity now displays associated file changes as expandable diff details.
  • Added clearer sequencing for streamed messages, thoughts, approvals, and other conversation events.

• Bug Fixes

  • Improved handling of optimistic updates and reconnects to reduce duplicated or misplaced conversation entries.
  • Preserved streamed content more reliably while updates are received.

• Refactor

  • Standardized conditional rendering across authentication and chat interfaces without changing their behavior.

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Project	Deployment	Actions	Updated (UTC)
cyrus	Ready	Preview	Aug 5, 2026 12:22pm

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Review details

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 7eae17d2-4f34-4f81-a150-1d1c3215fd13

📥 Commits

Reviewing files that changed from the base of the PR and between 524e83d and e262d32.

📒 Files selected for processing (4)

• apps/web/src/components/chat/work-log/diff-row.tsx
• apps/web/src/components/chat/work-log/tool-row.test.tsx
• shared/utils/src/conversations/fold.test.ts
• shared/utils/src/conversations/fold.ts

📝 Walkthrough

Walkthrough

Conversation processing now uses seq and sub metadata for streaming, caching, folding, replay, and feed ordering. Tool diffs are nested in tool calls. Web components use a shared Show helper for conditional rendering.

Changes

Conversation sequencing and feed pipeline

Layer / File(s)	Summary
Sequence and view contracts shared/schemas/src/rtc/*, shared/schemas/src/view/index.ts	Schemas add optional subsequences and required sequence fields. Tool-call views now contain nested diffs.
Entry ordering and merging shared/utils/src/conversations/entries.ts, shared/utils/src/conversations/entries.test.ts	Entries classify persistence by sub, sort by (seq, sub, createdAt), calculate persisted sequence values, and merge cached entries with fetched entries.
Conversation folding and feed construction shared/utils/src/conversations/fold.ts, shared/utils/src/conversations/thread-feed.ts, shared/utils/src/conversations/*test.ts	Folding stores sequence metadata, derives tool-call diffs, preserves sorted input order, and builds feeds with sequence-based ordering.
Streaming cache and event-bus replay apps/cli/src/queue/*, shared/hooks/src/conversation/*, shared/hooks/package.json	The event bus stamps ephemeral chunks. Conversation caching uses Throttler, subsequence-aware pruning, optimistic sequence values, and incremental fetching.
Conditional UI and tool-diff rendering apps/web/src/components/helpers/show.tsx, apps/web/src/components/auth/*, apps/web/src/components/chat/*	The shared Show helper replaces inline conditional JSX. Tool rows render nested diffs, and standalone diff feed entries are removed.

Estimated code review effort: 4 (Complex) | ~45 minutes

Possibly related PRs

• soorya-u/cyrus#23: Related event-bus and conversation streaming sequence changes.
• soorya-u/cyrus#49: Overlapping composer, tool-row, and thread-feed changes.
• soorya-u/cyrus#136: Overlapping authentication component changes.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 8.77% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the primary changes to conversation folding, thread-feed logic, and the thread event bus.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches 💡 1

📝 Generate docstrings 💡

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch conversation-fold-and-bus-refactor

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Actionable comments posted: 2

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@apps/web/src/components/chat/work-log/tool-row.tsx`:
- Around line 56-57: Prevent nested DiffRow controls from triggering the parent
ToolRow expansion handlers: either move the parent expand/collapse role and
handlers to the tool header, or stop click and keyboard event propagation in
DiffRow while preserving both toggle behaviors. Add a regression test verifying
that opening a diff leaves its parent tool row open.

In `@shared/utils/src/conversations/fold.ts`:
- Around line 463-467: Update latestTurnIdFromEntries() to determine the latest
user turn from canonical (seq, sub) entry order rather than createdAt, scanning
sorted entries in reverse or comparing sequence keys directly. Preserve the
active-turn streaming and turn-state behavior, and add coverage with reversed
timestamps where a later running turn remains identified as latest.

🪄 Autofix

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 4d311f50-05ef-4124-b10b-8bb6fb979942

📥 Commits

Reviewing files that changed from the base of the PR and between ad69ef8 and 524e83d.

⛔ Files ignored due to path filters (1)

• bun.lock is excluded by !**/*.lock

📒 Files selected for processing (29)

• apps/cli/package.json
• apps/cli/src/queue/bus.test.ts
• apps/cli/src/queue/bus.ts
• apps/web/src/components/auth/login-form.tsx
• apps/web/src/components/auth/magic-link-sent.tsx
• apps/web/src/components/auth/provider-button.tsx
• apps/web/src/components/auth/security/active-session.tsx
• apps/web/src/components/auth/security/active-sessions.tsx
• apps/web/src/components/auth/security/linked-accounts.tsx
• apps/web/src/components/chat/composer/agent-model-picker.tsx
• apps/web/src/components/chat/composer/compact-composer-controls.tsx
• apps/web/src/components/chat/composer/footer-controls.tsx
• apps/web/src/components/chat/feed/feed-entry-view.tsx
• apps/web/src/components/chat/work-log/diff-row.tsx
• apps/web/src/components/chat/work-log/tool-row.tsx
• apps/web/src/components/helpers/show.tsx
• shared/hooks/package.json
• shared/hooks/src/conversation/conversation-cache.ts
• shared/hooks/src/conversation/use-interactive-respond.ts
• shared/hooks/src/conversation/use-thread-conversation.ts
• shared/schemas/src/rtc/chat.ts
• shared/schemas/src/rtc/threads.ts
• shared/schemas/src/view/index.ts
• shared/utils/src/conversations/entries.test.ts
• shared/utils/src/conversations/entries.ts
• shared/utils/src/conversations/fold.test.ts
• shared/utils/src/conversations/fold.ts
• shared/utils/src/conversations/thread-feed.test.ts
• shared/utils/src/conversations/thread-feed.ts

💤 Files with no reviewable changes (1)

• apps/web/src/components/chat/feed/feed-entry-view.tsx