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fix(FN-4400): preserve triggering comment headings in trim helper

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Fusion-Task-Id: FN-4400
Fusion-Task-Lineage: 0d4f9c48-5b8b-49eb-9cf3-d1d585ffe7fc
This commit is contained in:
Fusion
2026-05-14 03:45:09 -07:00
committed by gsxdsm
parent 6a615b005a
commit e77cd39b67
2 changed files with 21 additions and 4 deletions
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11
packages/engine/src/__tests__/heartbeat-prompt-trim.test.ts
View File

@@ -85,6 +85,17 @@ describe("trimTriggeringComments", () => {
expect(trimTriggeringComments(lines, "default")).toEqual(["t3", "t4", "t5"]); expect(trimTriggeringComments(lines, "default")).toEqual(["t3", "t4", "t5"]);
}); });
it("preserves heading lines while trimming comment body", () => {
const headings = [
"",
"You were woken because of new comments on this task. Review them and take appropriate action.",
"Triggering comment type: task",
"New comments since last run:",
];
const lines = [...headings, "c1", "c2", "c3", "c4", "c5"];
expect(trimTriggeringComments(lines, "compact")).toEqual([...headings, "c3", "c4", "c5"]);
});
it("caps joined body at 500 chars and appends marker", () => { it("caps joined body at 500 chars and appends marker", () => {
const lines = ["h1", "h2", `A${"z".repeat(600)}`, `B${"z".repeat(600)}`, `C${"z".repeat(600)}`]; const lines = ["h1", "h2", `A${"z".repeat(600)}`, `B${"z".repeat(600)}`, `C${"z".repeat(600)}`];
const trimmed = trimTriggeringComments(lines, "default"); const trimmed = trimTriggeringComments(lines, "default");

14
packages/engine/src/heartbeat-prompt-trim.ts
View File

@@ -30,16 +30,22 @@ export function trimPromptMd(prompt: string | undefined, template: HeartbeatProm
return truncate(prompt, PROMPT_MD_CAP[template], TASK_TRUNCATION_MARKER); return truncate(prompt, PROMPT_MD_CAP[template], TASK_TRUNCATION_MARKER);
} }
const TRIGGERING_COMMENT_HEADING = "New comments since last run:";
export function trimTriggeringComments(lines: string[], _template: HeartbeatPromptTemplate): string[] { export function trimTriggeringComments(lines: string[], _template: HeartbeatPromptTemplate): string[] {
if (lines.length <= 3) { const headingIndex = lines.indexOf(TRIGGERING_COMMENT_HEADING);
const headings = headingIndex >= 0 ? lines.slice(0, headingIndex + 1) : [];
const body = headingIndex >= 0 ? lines.slice(headingIndex + 1) : lines;
if (body.length <= 3) {
return lines; return lines;
} }
const selected = lines.slice(-3); const selected = body.slice(-3);
const joined = selected.join("\n"); const joined = selected.join("\n");
if (joined.length <= 500) { if (joined.length <= 500) {
return selected; return [...headings, ...selected];
} }
const truncated = truncate(joined, 500, COMMENTS_TRUNCATION_MARKER); const truncated = truncate(joined, 500, COMMENTS_TRUNCATION_MARKER);
return truncated.split("\n"); return [...headings, ...truncated.split("\n")];
} }