feat(review): add threaded inline comments

[benvinegar]

Problem

Inline reviewer notes could only be created and deleted. Reviewers could not correct a saved note or continue a discussion beside the affected code, which forced context into disconnected notes or external review tools.

Approach

• add editable user notes and arbitrarily nested replies to the shared review model, intent planner, reducer, selectors, and protocol projections
• preserve note identity and anchor metadata during edits, inherit anchors for replies, and reject invalid/blank mutations or parent removal that would orphan descendants
• render connected inline threads in the terminal with bounded visual indentation, exact shared geometry, compact file/range titles, and mouse/keyboard Reply, Edit, Delete, Save, and Cancel actions
• preserve the viewport when mouse-opening Edit or Reply while retaining keyboard reveal behavior
• publish parent identity and edit lifecycle data through the existing session, broker, conformance, and extension snapshot surfaces; bump the extension API to v12

This belongs in review core because thread identity, mutation rules, ordering, and cross-surface parity are shared review semantics. Rendering, mouse hit areas, composer focus, and viewport preservation remain terminal-local.

Important boundaries

• only editable reviewer-authored notes can be edited
• replies currently target semantically stored live/user notes, not static sidecars without durable identities
• logical nesting is unlimited; terminal indentation is visually bounded
• global stateRevision remains the concurrency control

Verification

• bun run format
• bun run typecheck
• bun run lint
• bun run deps:check
• source-boundary and review-vocabulary suites: 18 passed
• bun run test: 2,067 passed, 10 skipped
• bun run test:integration: 136 passed, 1 platform skip
• post-polish focused AgentInlineNote tests: 19 passed
• post-polish bun test test/pty/notes.test.ts: 19 passed
• bun run test:tty-smoke: 9 passed
• bun run install:bin
• installed-binary real-TTY transcript smoke: exited 0
• git diff --check

Platforms

Tested on Linux. macOS and Windows were not tested locally; the existing macOS-only PTY lifecycle test remained skipped.

Visual evidence

Validated in the real Hunk TUI through PTY interaction coverage and a local installed-binary TTY transcript smoke. No media is attached.

Release

Includes a minor hunkdiff Changeset.

This PR description was generated by Pi using gpt-5.6-sol

[greptile-apps]

Too many files changed for review (55 files, 50 file limit).

Bypass the limit by tagging @greptile-apps to review.

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
hunk-web	Ignored	Preview	Aug 30, 2026 9:08pm

[lekemula]

Hi @benvinegar, thanks for adding this great missing feature!

I checked it out; however, I noticed an issue entering edit mode using the keyboard only. When navigating with j/k toward the saved note, the only way to enter in edit note seem to only be possible via "mouse":

Monosnap.screencast.2026-09-04.10-43-34.mp4

As seen on the recording above, even when I hover with the mouse & press e, it goes into editing the file and not the saved note.

I'm using iTerm + tmux - wonder if this has anything to do with it.

Am I missing something? Let me know if I can provide you with more information.