- Removed `#compactedChildStart` state, `compactable` segment field, and `#compactCommittedPrefix()` method, stopping the local-frame pruning of committed finalized rows.
- Post-finalize mutations now surface on every render via version tracking, instead of requiring a destructive replay to rehydrate the compacted block.
- Changed `print-mode.ts` to use `session.getLastAssistantMessage()` instead of array tail read, fixing access to terminal assistant messages after compaction removal.
TranscriptContainer gated committed-prefix compaction on version === undefined, so version-tracked AssistantMessageComponent history never compacted and every stream tick re-walked all N sealed blocks (depth-linear compose).
Compact fully-committed finalized blocks regardless of post-finalize version tracking: their rows are immutable native scrollback the terminal owns. A post-commit mutation no longer recommits on ordinary frames (no duplication) and rehydrates on the next destructive full replay (no loss). Adds the permanent bench/transcript-compose.bench.ts fixture; ratio(N5000/N500) drops 2.30 -> 0.90.
Fixes#5930
Added an opt-in viewport-pinned live-region policy and propagated it through transcript composition for in-flight vibe_wait TV walls.
Pinned mutable wall frames now repaint virtually until finalization, while append-only live regions retain their existing frozen-snapshot behavior.
Fixes#5777
After #5239 compaction, a later render only fills segments from
#compactedChildStart, leaving undefined holes in the prefix. Iterating
those entries crashed when retiring IRC/ephemeral cards
(`segment2.component`). Guard undefined segment slots and cover the
sparse-hole path with a red/green regression.
- Added auto-sealing logic to `FinalizableBlock` to finalize displaceable snapshots when they enter the scrollback area.
- Updated TUI frame emission to publish committed rows and clamp them to segment bounds, ensuring accurate component updates.
- Introduced component tracking and cleanup in event controller tests to prevent resource leaks during finalization.
- Validated state transitions and post-emit synchronization through comprehensive new test suites for transcript and TUI components.
- Enforced strict history protection by gating ephemeral block removal on uncommitted state across controllers and UI components.
- Optimized settled-row calculations using explicit mermaid fence detection and improved scrollback integrity.
- Refactored transience management to target only actively streaming blocks, preventing redundant label rendering.
- Implemented persistent compaction for auto-retry errors and enabled consistent terminal title updates during session renaming.
- Removed complex snapshot caching and volatile/stable state tracking logic.
- Replaced multi-zone audit logic with streamlined tail-sample checks.
- Simplified render boundaries by deriving a single final boundary from the live region.
- Eliminated redundant audit state management and auxiliary safe-end interfaces.
Merged PR #4330 and fixed the remaining offered-boundary regression by stopping offer promotion at intervening live blocks.
Verified with targeted transcript/native scrollback regressions: 40 pass.
Separated audited offerable transcript rows from durable snapshot rows so lower finalized content below a live block can be repaired instead of duplicated when the live block grows.
Added transcript and virtual-terminal regressions for the lower finalized tail case.
Fixes#4326
- Tracked snapshot-safe boundaries to retain commit-stable streamed rows in scrollback.
- Computed durableBoundary from commit and snapshot ends to prevent row drop regressions.
- Updated audit-row handling so drifting durable rows were excluded from resync checks.
- Added regression tests for commit-stable and commit-unstable relayout streaming cases.
- Added tail-only transcript rendering via `renderViewportTail`, stopping at `maxRows` and returning `EMPTY_TAIL`.
- Added `ViewportTailProvider`/`asViewportTailProvider` API and resize getters for viewport state.
- Implemented viewport-only painting during non-mux resize with deferred full repaint after settle.
- Added settle-resize helpers and coverage for deferred repaint timing and cancel paths.
- Added commit-stability signaling to transcript blocks and marked tool previews as unstable until expanded or finalized.
- Updated transcript scrollback promotion to derive live commit state only for blocks reporting commit-stable rows.
- Added tests ensuring provisional pending edit previews are never committed while durable live rows still promote after the stability window.
- Added transcript and assistant block version tracking for finalized segments.
- Changed committed block reuse logic to require prior finalization and same version.
- Fixed rerendering of committed finalized blocks when version values changed.
append-only insertions above the floor no longer arm a permanent promotion freeze; floor index travels with the insertion; documented the floor semantics in the renderer internals doc.
- Capped live transcript IRC cards at four and evicted oldest cards when over limit.
- Reworked IRC card expiry handling to retire cards via timers only while live.
- Added rewrite-floor tracking so rewritten rows are not repeatedly promoted to scrollback.
- Introduced a stable-prefix ratchet in `deriveLiveCommitState` for 30-frame row stability.
- Computed `safeLength` from the stable prefix when `appendOnly` is false so static heads reach scrollback.
- Persisted stable-prefix/candidate state in `LiveDiffSnapshot` and `LiveCommitState` for boundary retreat on rewrites.
- Removed terminal risk mode toggles from config, terminal state collection, and render controllers.
- Dropped snapshot freezing, thaw tracking, and finalized-block replay in transcript rendering.
- Removed clear-on-shrink settings and initialization hooks from selector and interactive mode flows.
- Simplified render scheduling by using requestRender() without mutation flags or stream checkpoints.
- Added Anthropic request-shaping coverage for adaptive and non-adaptive models in packages/ai/test.
- Removed obsolete scratch thinking test used for commit-boundary tracing in coding-agent.
- Added regressions for transcript append-only handling on wrapped styled rows and trailing-line shrink.
- Added streaming-thinking and spinner-style reproduction coverage for commit-safe boundaries.
- Changed transcript commit tracking from a volatile boolean to a cooldown counter that decays over clean frames.
- Normalized row equality checks to ignore ANSI and trailing-space noise so equivalent renders do not trigger rewrites.
- Removed the Bun test-runtime exception from Ghostty image paint deferral so normal delay logic always runs.
- Updated live transcript state derivation to treat a trailing-line extension with unchanged rows as append-only.
- Replaced the prior append-grew heuristic with preserved-row checks so non-rewritten history is not marked volatile.
- Added a regression test covering in-place streaming line growth and scrollback commit safety in transcript containers.
- Computed live commit state from render diffs and drove native scrollback via safeLength.
- Fixed volatile live tool rows committing only after stream finalization in native scrollback.
- Stored append-only and volatile flags in FrozenRender snapshots for live-row tracking.
- Removed append-only streaming predicates from assistant and tool rendering paths.
- Centralized transcript spacing by stripping blank edges and inserting separators.
- Removed per-component leading spacers and empty placeholders that added extra gaps.
- Introduced TranscriptBlock grouping so related outputs render as single transcript children.
- Updated transcript-related tests to validate one-row block separators and blank-line trimming.
- Fixed assistant transcript blocks to expose append-only commit-safe boundaries.
- Updated TUI live-region commit and pinned-paint logic to clamp commit-safe ends.
- Fixed long streamed assistant replies to remain in native scrollback on overflow.
- Replaced bottom-most-block liveness with a finalization check so the live region spans every still-mutating block.
- Kept unfinalized tools repaintable when out-of-band inserts append finalized blocks below them.
- Recomputed blocks as they cross out of the live region to seal their final content.
- Added `NativeScrollbackLiveRegion` seam so components report the live suffix start.
- Stopped ED3-risk streaming from dropping sealed transcript rows above the live block.
- Appended newly sealed rows once while keeping the active tail deferred to checkpoint.
- Added NativeScrollbackLiveRegion seam reporting where a component's transient suffix begins.
- Pinned the live block and chrome below it out of native history during foreground streams on ED3-risk terminals.
- Consumed pending forced scrollback wipes while pinned to avoid yanking a scrolled-up reader (#1682).
- Tracked the previous live child in TranscriptContainer and forced a one-off recompute when a block leaves live status.
- Skipped snapshot reuse for that transitioning block so coalesced finalize-and-append frames seal transcript blocks at their final content.
- Added a regression test covering the stale-prefix freeze case on ED3-risk terminals and confirming the frozen block stays unchanged until thaw.
- Added assistant-message completion state and stable-line count reporting.
- Added transcript stable-row aggregation and snapshot replay to keep unstable rows out of scrollback.
- Added TUI stable scrollback boundary APIs and stable-prefix commit path.
- Added regression tests proving unstable rows stay out of scrollback until stabilized.
- Added TranscriptContainer that snapshots non-live blocks to avoid stale scrollback duplicates.
- Thawed snapshots at prompt-submit checkpoints for reconciliation.
- Repainted eager streaming tail on overflowing shrink to unfreeze UI (issue #1682).
Daniel Anderson-Little