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-rw-r--r--src/core/chunks/reducer.test.ts49
-rw-r--r--src/core/chunks/reducer.ts39
-rw-r--r--src/core/chunks/selectors.test.ts133
-rw-r--r--src/core/chunks/selectors.ts202
-rw-r--r--src/core/chunks/trim.test.ts13
-rw-r--r--src/core/chunks/trim.ts10
6 files changed, 420 insertions, 26 deletions
diff --git a/src/core/chunks/reducer.test.ts b/src/core/chunks/reducer.test.ts
index 22b94d4..4996e88 100644
--- a/src/core/chunks/reducer.test.ts
+++ b/src/core/chunks/reducer.test.ts
@@ -1085,3 +1085,52 @@ describe("foldEvent — authoritative turn terminal", () => {
expect(before.accumulating?.text).toBe("partial");
});
});
+
+describe("foldEvent — re-replay of an in-flight turn (re-subscribe after tab switch / reconnect)", () => {
+ const userMessage = (turnId: string, text: string): TurnInputEvent => ({
+ type: "user-message",
+ conversationId: "c1",
+ turnId,
+ text,
+ });
+ const replay = (upTo: number) =>
+ [
+ userMessage("t1", "go"),
+ turnStart("t1"),
+ reasoningDelta("t1", "plan"),
+ toolCall("t1", "tc1", "read", {}),
+ toolResult("t1", "tc1", "read", "out"),
+ { type: "steering", conversationId: "c1", turnId: "t1", text: "also this" } as const,
+ reasoningDelta("t1", "more"),
+ toolCall("t1", "tc2", "read", {}),
+ ].slice(0, upTo);
+
+ it("replaces the stale copy instead of appending a duplicate turn", () => {
+ let s = replay(7).reduce(foldEvent, initialState()); // first view, mid-thinking
+ s = replay(8).reduce(foldEvent, s); // came back: the whole turn replays again
+ const once = replay(8).reduce(foldEvent, initialState());
+ expect(selectChunks(s)).toEqual(selectChunks(once));
+ expect(s.accumulating).toBeNull();
+ });
+
+ it("drops a stale steering bubble that ended the old copy", () => {
+ let s = replay(6).reduce(foldEvent, initialState()); // old copy ends in steering
+ s = replay(8).reduce(foldEvent, s);
+ expect(selectChunks(s).filter((c) => c.role === "user")).toHaveLength(2); // opening + steer
+ });
+
+ it("keeps other turns' provisional chunks", () => {
+ let s = [turnStart("t0"), textDelta("t0", "earlier"), doneEvent("t0")].reduce(
+ foldEvent,
+ initialState(),
+ );
+ s = replay(4).reduce(foldEvent, s);
+ s = replay(4).reduce(foldEvent, s);
+ expect(selectChunks(s).map((c) => c.chunk.type)).toEqual([
+ "text",
+ "text",
+ "thinking",
+ "tool-call",
+ ]);
+ });
+});
diff --git a/src/core/chunks/reducer.ts b/src/core/chunks/reducer.ts
index ee5858f..35bb1bb 100644
--- a/src/core/chunks/reducer.ts
+++ b/src/core/chunks/reducer.ts
@@ -77,6 +77,26 @@ function tagTrailingUserEcho(
}
/**
+ * Drop the previous copy of a turn that is being replayed from its start.
+ * Keeps the trailing user run — the opening this replay's `user-message` just
+ * appended (or the sender's echo that `turn-start` just tagged) — and every
+ * other turn's chunks.
+ */
+function dropReplayedTurn(
+ provisional: readonly ProvisionalChunk[],
+ turnId: string,
+): readonly ProvisionalChunk[] {
+ let tail = provisional.length;
+ while (tail > 0 && provisional[tail - 1]?.role === "user") tail--;
+ // A stale steering bubble (replayed again as its own `steering` event) can
+ // end the old copy and so sit inside the trailing user run.
+ const stale = (p: ProvisionalChunk, i: number): boolean =>
+ p.turnId === turnId && (i < tail || p.afterToolCallId !== undefined);
+ if (!provisional.some(stale)) return provisional;
+ return provisional.filter((p, i) => !stale(p, i));
+}
+
+/**
* Content equality for two chunks of the SAME role (used to de-dup an
* optimistic echo against the authoritative committed version). Compares the
* discriminating payload only — `stepId` (generation provenance) is ignored
@@ -288,17 +308,26 @@ function reduceEvent(state: TranscriptState, event: AgentEvent): TranscriptState
case "tool-output":
return state;
- case "turn-start":
+ case "turn-start": {
+ // A turn starts exactly once live, so a `turn-start` for a turn that
+ // already has provisional content is a late-join REPLAY restarting from
+ // the top (re-subscribe after a tab switch / WS reconnect): the server
+ // re-delivers the whole in-flight turn. Replace the stale copy instead of
+ // appending a second one (a duplicate copy rendered as a tail of thinking
+ // blocks with its tool cards collapsed onto the first copy's).
+ const stale = state.accumulating?.turnId === event.turnId;
+ const provisional = tagTrailingUserEcho(
+ flushAccumulating(state.provisional, stale ? null : state.accumulating),
+ event.turnId,
+ );
return {
...state,
- provisional: tagTrailingUserEcho(
- flushAccumulating(state.provisional, state.accumulating),
- event.turnId,
- ),
+ provisional: dropReplayedTurn(provisional, event.turnId),
accumulating: null,
currentTurnId: event.turnId,
generating: true,
};
+ }
case "user-message": {
// The turn's USER prompt, surfaced on the event stream (backend CR-3) so a
diff --git a/src/core/chunks/selectors.test.ts b/src/core/chunks/selectors.test.ts
index 05dcc4e..3afc324 100644
--- a/src/core/chunks/selectors.test.ts
+++ b/src/core/chunks/selectors.test.ts
@@ -2,6 +2,7 @@ import type { AgentEvent, StepId, StoredChunk } from "@dispatch/wire";
import { describe, expect, it } from "vitest";
import { applyHistory, foldEvent, initialState, markHistoryRecovering } from "./reducer";
import { selectChunks } from "./selectors";
+import { trimTranscript } from "./trim";
import type { TranscriptState } from "./types";
const C = "conv";
@@ -166,6 +167,138 @@ describe("selectChunks — de-dup of a late-join replay against committed histor
expect(selectChunks(s).filter((r) => r.provisional)).toHaveLength(2);
});
+ it("de-dups the replay when the committed turn's head was unloaded (windowed/trimmed)", () => {
+ // A long in-flight turn: the chat-limit window/trim unloaded the turn's
+ // head (seq 1–2), so the committed run starts mid-turn while the late-join
+ // replay re-delivers the WHOLE turn from its opening. Positional alignment
+ // from the turn start fails at index 0; without re-anchoring, the whole
+ // replay rendered as a duplicate whose tool cards collapsed onto the
+ // committed ones — leaving a tail of thinking blocks with no tool calls.
+ let s = trimTranscript(applyHistory(initialState(), committedStep0), 2);
+ expect(s.committed.map((c) => c.seq)).toEqual([3, 4]);
+ s = fold(s, [userMsg, turnStart, think("plan"), call("a"), result("a"), think("next")]);
+ const rendered = selectChunks(s);
+ expect(rendered.map((r) => [r.seq, r.chunk.type])).toEqual([
+ [3, "tool-call"],
+ [4, "tool-result"],
+ [null, "thinking"],
+ ]);
+ expect(rendered[2]).toMatchObject({ streaming: true, chunk: { text: "next" } });
+ });
+
+ it("de-dups when the provisional replay starts after the committed run's head", () => {
+ // Provisional trimmed past the committed head (e.g. committed restored via
+ // "Show earlier" after an all-provisional overflow): re-anchor on the
+ // provisional head instead.
+ let s = applyHistory(initialState(), committedStep0);
+ s = fold(s, [userMsg, turnStart, think("plan"), call("a"), result("a"), call("b", 1)]);
+ s = { ...s, provisional: s.provisional.slice(2) }; // drop user + thinking
+ const rendered = selectChunks(s);
+ expect(rendered.map((r) => [r.seq, r.chunk.type])).toEqual([
+ [1, "text"],
+ [2, "thinking"],
+ [3, "tool-call"],
+ [4, "tool-result"],
+ [null, "tool-call"],
+ ]);
+ });
+
+ it("re-anchors on a persisted tool call even if the replay diverges after it", () => {
+ // A toolCallId is a unique identity: everything the replay delivered before
+ // it was persisted earlier in the turn (append-only), so it is unloaded
+ // history — not divergent content. The divergence itself stays visible.
+ let s = applyHistory(initialState(), committedStep0.slice(2));
+ s = fold(s, [userMsg, turnStart, think("plan"), call("a"), result("OTHER")]);
+ const provisional = selectChunks(s).filter((r) => r.provisional);
+ expect(provisional.map((r) => r.chunk)).toMatchObject([
+ { type: "tool-result", toolCallId: "OTHER" },
+ ]);
+ });
+
+ it("does not re-anchor on an unverified text match (never hides divergent content)", () => {
+ const committed: StoredChunk[] = [
+ { seq: 7, role: "assistant", chunk: { type: "thinking", text: "plan" }, turnId: T },
+ { seq: 8, role: "assistant", chunk: { type: "text", text: "persisted" }, turnId: T },
+ ];
+ let s = applyHistory(initialState(), committed);
+ s = fold(s, [userMsg, turnStart, think("plan"), text("diverged"), call("z")]);
+ // "plan" matches but the next chunk diverges: no anchor → nothing hidden.
+ expect(selectChunks(s).filter((r) => r.provisional)).toHaveLength(4);
+ });
+
+ it("steps over persisted images the replay can never carry", () => {
+ // A tool attached an image mid-turn: history persists it as a user image
+ // chunk, but no live event carries it, so the replay lacks it.
+ const image: StoredChunk = {
+ seq: 5,
+ role: "user",
+ chunk: { type: "image", url: "/images/conv/x.png" },
+ turnId: T,
+ };
+ const thinking: StoredChunk = {
+ seq: 6,
+ role: "assistant",
+ chunk: { type: "thinking", text: "look" },
+ turnId: T,
+ };
+ let s = applyHistory(initialState(), [...committedStep0, image, thinking]);
+ s = fold(s, [userMsg, turnStart, think("plan"), call("a"), result("a"), think("look")]);
+ s = fold(s, [call("b", 1)]);
+ const provisional = selectChunks(s).filter((r) => r.provisional);
+ expect(provisional.map((r) => r.chunk)).toMatchObject([{ type: "tool-call", toolCallId: "b" }]);
+ });
+
+ it("matches one merged thinking block against its split committed blocks (Claude)", () => {
+ // Claude may return several thinking blocks in one step; history persists
+ // each as its own chunk, but reasoning-deltas carry no block boundary, so
+ // the replay delivers them merged into one thinking chunk.
+ const split: StoredChunk[] = [
+ committedStep0[0] as StoredChunk,
+ { seq: 2, role: "assistant", chunk: { type: "thinking", text: "first. " }, turnId: T },
+ { seq: 3, role: "assistant", chunk: { type: "thinking", text: "second." }, turnId: T },
+ { ...(committedStep0[2] as StoredChunk), seq: 4 },
+ { ...(committedStep0[3] as StoredChunk), seq: 5 },
+ ];
+ let s = applyHistory(initialState(), split);
+ s = fold(s, [userMsg, turnStart, think("first. "), think("second."), call("a"), result("a")]);
+ s = fold(s, [think("next")]);
+ const rendered = selectChunks(s);
+ expect(rendered.map((r) => [r.seq, r.chunk.type])).toEqual([
+ [1, "text"],
+ [2, "thinking"],
+ [3, "thinking"],
+ [4, "tool-call"],
+ [5, "tool-result"],
+ [null, "thinking"],
+ ]);
+ });
+
+ it("hides an accumulating merged block once its split blocks are committed", () => {
+ const split: StoredChunk[] = [
+ ...committedStep0,
+ { seq: 5, role: "assistant", chunk: { type: "thinking", text: "a" }, turnId: T },
+ { seq: 6, role: "assistant", chunk: { type: "thinking", text: "b" }, turnId: T },
+ ];
+ let s = applyHistory(initialState(), split);
+ s = fold(s, [userMsg, turnStart, think("plan"), call("a"), result("a"), think("ab")]);
+ expect(selectChunks(s).every((r) => !r.provisional)).toBe(true);
+ });
+
+ it("re-anchors on a tool chunk when the window cut between split blocks", () => {
+ // The committed head is the SECOND of two split blocks: it equals no
+ // provisional chunk, so alignment anchors on the run's first tool chunk.
+ const committed: StoredChunk[] = [
+ { seq: 3, role: "assistant", chunk: { type: "thinking", text: "second." }, turnId: T },
+ { ...(committedStep0[2] as StoredChunk), seq: 4 },
+ { ...(committedStep0[3] as StoredChunk), seq: 5 },
+ ];
+ let s = applyHistory(initialState(), committed);
+ s = fold(s, [userMsg, turnStart, think("first. second."), call("a"), result("a")]);
+ s = fold(s, [call("b", 1)]);
+ const provisional = selectChunks(s).filter((r) => r.provisional);
+ expect(provisional.map((r) => r.chunk)).toMatchObject([{ type: "tool-call", toolCallId: "b" }]);
+ });
+
it("is the identity when there is no committed history", () => {
const s = fold(initialState(), [userMsg, turnStart, text("hello")]);
expect(selectChunks(s)).toHaveLength(2);
diff --git a/src/core/chunks/selectors.ts b/src/core/chunks/selectors.ts
index b507cf7..8d32fcf 100644
--- a/src/core/chunks/selectors.ts
+++ b/src/core/chunks/selectors.ts
@@ -27,15 +27,163 @@ function sameChunk(p: ProvisionalChunk, c: StoredChunk): boolean {
}
/**
+ * A committed chunk with no live-event counterpart, so a late-join replay can
+ * never contain it: an image persisted into the turn's history (pasted-image
+ * openings, images a tool attaches mid-turn). Alignment steps over it.
+ */
+function replayless(c: StoredChunk): boolean {
+ return c.chunk.type === "image";
+}
+
+/** Where an alignment walk stopped, and whether it stopped on a mismatch. */
+interface Walk {
+ /** First provisional index NOT matched. */
+ readonly p: number;
+ /** First committed index NOT matched (replayless chunks stepped over). */
+ readonly c: number;
+ readonly matched: number;
+ /** Ended because a side ran out — no mismatch. */
+ readonly complete: boolean;
+}
+
+/**
+ * How many consecutive committed chunks starting at `c` one provisional text /
+ * thinking chunk stands for: their texts must concatenate EXACTLY to its text
+ * (≥ 2 chunks; 0 = no such run). A provider may return several blocks in one
+ * step (Claude emits multiple thinking blocks, each with its own signature)
+ * which history persists as separate chunks, while the delta stream carries
+ * no block boundary — so live (and in the replay) they arrive merged.
+ */
+function mergedRun(
+ state: TranscriptState,
+ text: string,
+ kind: string,
+ role: string,
+ c: number,
+): number {
+ let joined = "";
+ for (let k = c; k < state.committed.length; k++) {
+ const row = state.committed[k];
+ if (row === undefined || row.role !== role || row.chunk.type !== kind) return 0;
+ if (row.chunk.type !== "text" && row.chunk.type !== "thinking") return 0;
+ joined += row.chunk.text;
+ if (joined === text) return k - c + 1 >= 2 ? k - c + 1 : 0;
+ if (!text.startsWith(joined)) return 0;
+ }
+ return 0;
+}
+
+/**
+ * Walk provisional (from `p`) and committed (from `c`) of turn `turnId` in
+ * lockstep, stepping over committed chunks the replay cannot carry and
+ * matching one merged provisional block against its split committed run.
+ * Stops at the first mismatch or when either side runs out.
+ */
+function walk(state: TranscriptState, turnId: string, p: number, c: number): Walk {
+ let matched = 0;
+ for (;;) {
+ const prov = state.provisional[p];
+ let row = state.committed[c];
+ while (row !== undefined && replayless(row) && prov?.chunk.type !== "image") {
+ row = state.committed[++c];
+ }
+ if (prov === undefined || row === undefined) return { p, c, matched, complete: true };
+ if (prov.turnId !== turnId) return { p, c, matched, complete: false };
+ let span = sameChunk(prov, row) ? 1 : 0;
+ if (span === 0 && (prov.chunk.type === "text" || prov.chunk.type === "thinking")) {
+ span = mergedRun(state, prov.chunk.text, prov.chunk.type, prov.role, c);
+ }
+ if (span === 0) return { p, c, matched, complete: false };
+ p++;
+ c += span;
+ matched++;
+ }
+}
+
+/**
+ * Accept a re-anchored alignment. A tool chunk is a unique identity
+ * (`toolCallId`), so a match on one is trusted outright; a text-bearing match
+ * must be confirmed by the WHOLE overlap aligning (no mismatch), so a repeated
+ * text can never hide divergent content.
+ */
+function anchored(w: Walk, anchor: StoredChunk): boolean {
+ if (w.matched === 0) return false;
+ return w.complete || anchor.chunk.type === "tool-call" || anchor.chunk.type === "tool-result";
+}
+
+/**
+ * Align the provisional run with the committed run of turn T (which begins at
+ * committed index `start`). Returns how many leading provisional chunks are
+ * hidden as already committed, and the walk's end.
+ *
+ * Normally both start at the turn's opening. But the chat-limit window (fresh
+ * load `?limit=` / `windowTranscript`) and `trimTranscript` unload the OLDEST
+ * committed chunks, so in a long in-flight turn the committed run is a SUFFIX
+ * of the turn while the late-join replay re-delivers the whole turn from its
+ * `turn-start`: re-anchor on the committed head inside the replay, and hide
+ * the replayed chunks before it too (persisted history, unloaded — pageable
+ * via "Show earlier"). Conversely, provisional overflow trimming can leave the
+ * replay starting after the committed head: re-anchor on the replay's head
+ * inside the committed run. Unverifiable → the plain prefix walk (fail-safe:
+ * a misalignment shows a duplicate, never hides content).
+ */
+function align(state: TranscriptState, turnId: string, start: number): Walk {
+ const direct = walk(state, turnId, 0, start);
+ // Aligned from the turn's head (or fully consistent): plain prefix semantics.
+ if (direct.complete || direct.matched > 0) return direct;
+ let headAt = start;
+ while (
+ state.committed[headAt] !== undefined &&
+ replayless(state.committed[headAt] as StoredChunk)
+ )
+ headAt++;
+ // Anchor on the committed head — or, when the head is unmatchable (e.g. the
+ // window cut between two blocks a merged provisional chunk spans), on the
+ // run's first tool chunk, a unique identity.
+ const anchorsAt = [headAt];
+ for (let i = headAt + 1; i < state.committed.length; i++) {
+ const t = state.committed[i]?.chunk.type;
+ if (t === "tool-call" || t === "tool-result") {
+ anchorsAt.push(i);
+ break;
+ }
+ }
+ for (const at of anchorsAt) {
+ const head = state.committed[at];
+ if (head === undefined) continue;
+ for (let k = 1; k < state.provisional.length; k++) {
+ const p = state.provisional[k];
+ if (p?.turnId !== turnId || !sameChunk(p, head)) continue;
+ const w = walk(state, turnId, k, at);
+ if (anchored(w, head)) return w;
+ }
+ }
+ const p0 = state.provisional[0];
+ if (p0 !== undefined) {
+ for (let j = headAt + 1; j < state.committed.length; j++) {
+ const row = state.committed[j];
+ if (row === undefined || !sameChunk(p0, row)) continue;
+ const w = walk(state, turnId, 0, j);
+ if (anchored(w, row)) return w;
+ }
+ }
+ return direct;
+}
+
+/**
* How many LEADING provisional chunks are already backed by committed chunks.
*
* The backend persists each step of an in-flight turn as it completes (CR-6),
* so a client that opens a conversation mid-turn gets those steps from history
* AND again from the late-join event replay (as provisional chunks). Both
* carry the turn's chunks in the same order, so the provisional run of turn T
- * is aligned position-by-position with the committed run of turn T. Skip the
- * aligned prefix; stop at the first mismatch (fail-safe: a misalignment shows
- * a duplicate, never hides content).
+ * is aligned chunk-by-chunk with the committed run of turn T (see `align`).
+ * Skip the aligned prefix; stop at the first mismatch.
+ *
+ * A failed alignment renders the ENTIRE replay as a duplicate — and because
+ * tool cards de-dup by `toolCallId` onto the first (committed) occurrence,
+ * that duplicate tail shows only thinking/text blocks ("the tool calls
+ * disappear"). Hence the re-anchoring and the replayless-image stepping.
*
* Also reports whether the ACCUMULATING chunk is already committed (the step
* completed + history synced, but the next live event hasn't flushed it yet).
@@ -48,31 +196,47 @@ function committedOverlap(state: TranscriptState): { skip: number; hideAccumulat
// The committed run for this turn (contiguous at the tail of `committed`).
let start = state.committed.length;
while (start > 0 && state.committed[start - 1]?.turnId === turnId) start--;
- const run = state.committed.length - start;
- if (run === 0) return { skip: 0, hideAccumulating: false };
-
- let skip = 0;
- while (skip < state.provisional.length && skip < run) {
- const p = state.provisional[skip];
- const c = state.committed[start + skip];
- if (p === undefined || c === undefined || p.turnId !== turnId || !sameChunk(p, c)) break;
- skip++;
- }
+ if (start === state.committed.length) return { skip: 0, hideAccumulating: false };
+
+ const end = align(state, turnId, start);
+ const skip = end.p;
let hideAccumulating = false;
const acc = state.accumulating;
- if (acc !== null && acc.turnId === turnId && skip === state.provisional.length && skip < run) {
- const c = state.committed[start + skip];
+ if (acc !== null && acc.turnId === turnId && skip === state.provisional.length) {
+ let next = end.c;
+ while (state.committed[next] !== undefined && replayless(state.committed[next] as StoredChunk))
+ next++;
+ const c = state.committed[next];
hideAccumulating =
- c !== undefined &&
- c.role === "assistant" &&
- c.chunk.type === acc.kind &&
- c.chunk.text === acc.text;
+ (c !== undefined &&
+ c.role === "assistant" &&
+ c.chunk.type === acc.kind &&
+ c.chunk.text === acc.text) ||
+ mergedRun(state, acc.text, acc.kind, "assistant", next) > 0;
}
return { skip, hideAccumulating };
}
/**
+ * How many chunks `selectChunks` would render, without materializing them.
+ * Provisional chunks hidden as history-backed / replay duplicates of committed
+ * chunks are NOT counted — the chat limit bounds what is on screen, and
+ * counting invisible duplicates would unload real history to make room for them.
+ */
+export function selectRenderedCount(state: TranscriptState): number {
+ const backed = historyBackedProvisional(state);
+ const { skip, hideAccumulating } = committedOverlap(state);
+ let count = state.committed.length;
+ for (let i = skip; i < state.provisional.length; i++) {
+ const p = state.provisional[i];
+ if (p !== undefined && !backed.has(p)) count++;
+ }
+ if (state.accumulating !== null && !hideAccumulating) count++;
+ return count;
+}
+
+/**
* Select all chunks for rendering: committed first (seq order),
* then provisional (seq: null), excluding history-backed identities. Unknown
* accumulating content stays live, even if its text equals an earlier step.
diff --git a/src/core/chunks/trim.test.ts b/src/core/chunks/trim.test.ts
index 24c75fd..dcc1755 100644
--- a/src/core/chunks/trim.test.ts
+++ b/src/core/chunks/trim.test.ts
@@ -103,6 +103,19 @@ describe("trimTranscript", () => {
expect(next.accumulating).not.toBeNull();
});
+ it("does not count a late-join replay's duplicates of committed chunks", () => {
+ // An in-flight turn of 8 persisted chunks + its late-join replay (8 more
+ // provisional copies). Only 8 are rendered, so a limit of 10 keeps them all
+ // instead of unloading real history to make room for invisible duplicates.
+ const T = "turn";
+ const committed = chunks(1, 8).map((c) => ({ ...c, turnId: T }));
+ const state: TranscriptState = {
+ ...stateWith(committed),
+ provisional: committed.map((c) => ({ role: c.role, chunk: c.chunk, turnId: T })),
+ };
+ expect(trimTranscript(state, 10)).toBe(state);
+ });
+
it("drops oldest provisional when committed is exhausted", () => {
const base = stateWith(chunks(1, 2));
const provisional = Array.from({ length: 20 }, (_, i) => ({
diff --git a/src/core/chunks/trim.ts b/src/core/chunks/trim.ts
index 259c101..6612bfe 100644
--- a/src/core/chunks/trim.ts
+++ b/src/core/chunks/trim.ts
@@ -14,6 +14,7 @@
// "Show earlier messages" affordance knows where to page back in from.
import type { StoredChunk } from "@dispatch/wire";
+import { selectRenderedCount } from "./selectors";
import type { TranscriptState } from "./types";
/** Default chat limit (max loaded chunks per conversation). */
@@ -46,9 +47,14 @@ export function initialWindowSize(limit: number): number {
return Math.max(1, Math.floor(limit * 0.75));
}
-/** Total loaded (rendered) chunk count: committed + provisional + accumulating. */
+/**
+ * Total loaded (rendered) chunk count: committed + provisional + accumulating,
+ * EXCLUDING provisional replay duplicates of committed chunks (a late-join
+ * replay re-delivers an in-flight turn's already-persisted steps). Counting
+ * those invisible duplicates unloaded real history to make room for them.
+ */
function totalCount(state: TranscriptState): number {
- return state.committed.length + state.provisional.length + (state.accumulating !== null ? 1 : 0);
+ return selectRenderedCount(state);
}
function countThinking(chunks: readonly StoredChunk[]): number {
generated by cgit v1.2.3 (git 2.39.1) at 2026-10-26 13:29:00 +0000