fusion/packages/core/src/task-store/task-artifacts-ops.ts

/**
 * FNXC:CodeOrganization 2026-07-20-14:00:
 * Domain rename from remaining-ops-7: merge-queue peeks, archive/done transitions,
 * comments, artifacts/documents, and related task side-effect helpers.
 *
 * FNXC:StoreModularization 2026-06-25-00:00:
 * Extracted from the monolithic packages/core/src/store.ts as a pure
 * behavior-preserving refactor. Each function receives the TaskStore
 * instance as its first parameter and performs byte-identical work.
 */

import { TaskStore } from "../store.js";
import { resolveProjectColumnsForRoles } from "../project-lane-vocabulary.js";
import {declaresAnyLifecycleTrait, resolveReviewColumns, resolveTaskLifecycleColumns} from "../workflow-lifecycle-traits.js";
import {resolveWorkflowIrForTask} from "../workflow-ir-resolver.js";
import { countAgentLogEntries, readAgentLogEntries } from "../agent-log-file-store.js";
import { toJsonNullable } from "../db.js";
import { DbTransaction, recordRunAuditEventWithinTransaction } from "../postgres/data-layer.js";
import { and, eq, inArray, isNull, ne } from "drizzle-orm";
import * as schema from "../postgres/schema/index.js";
import { runCommandAsync } from "../run-command.js";
import { getStepParser } from "../step-parsers.js";
import { getTaskMergeBlocker } from "../task-merge.js";
import { deleteTaskDocument as deleteTaskDocumentAsync, getArtifact as getArtifactAsync, getArtifacts as getArtifactsAsync, getLiveTaskColumn, getTaskDocument as getTaskDocumentAsync, getTaskDocumentRevisions as getTaskDocumentRevisionsAsync, listTaskDocuments as listTaskDocumentsAsync, updateArtifactRow as updateArtifactRowAsync } from "./async-comments-attachments.js";
import { emitUsageEvent as emitUsageEventAsync, recordPluginActivation as recordPluginActivationAsync } from "./async-events.js";
import { enqueueMergeQueue as enqueueMergeQueueAsync, peekMergeQueue as peekMergeQueueAsync, peekMergeQueueHead as peekMergeQueueHeadAsync } from "./async-merge-coordination.js";
import { clearCompletionHandoffMarker as clearCompletionHandoffMarkerAsync, getCompletionHandoffMarker as getCompletionHandoffMarkerAsync } from "./async-workflow-workitems.js";
import { extractEffectiveWriteScopeFromPrompt } from "../file-scope-classification.js";
import { ArtifactRow, WorkflowWorkItemRow } from "./row-types.js";
import { AgentLogEntry, Artifact, ArtifactCreateInput, Column, CompletionHandoffMarker, MergeQueueEnqueueOptions, MergeQueueEntry, PluginActivation, PluginActivationInput, RunMutationContext, Task, TaskDocument, TaskDocumentRevision, WorkflowWorkItem, WorkflowWorkItemKind, isColumn } from "../types.js";
import type { UsageEventInput } from "../usage-events.js";
import { existsSync } from "node:fs";
import { mkdir, readFile, writeFile } from "node:fs/promises";
import { join } from "node:path";
import { storeLog } from "../store.js";
import { resolveArchivedLanes } from "../project-lane-vocabulary.js";

export function listWorkflowWorkItemsForTaskSyncImpl(store: TaskStore, taskId: string, opts: { kinds?: WorkflowWorkItemKind[] } = {}): WorkflowWorkItem[] {
    const conditions = ["taskId = ?"];
    const params: unknown[] = [taskId];
    if (opts.kinds?.length) {
      conditions.push(`kind IN (${opts.kinds.map(() => "?").join(", ")})`);
      params.push(...opts.kinds);
    }
    const rows = store.db
      .prepare(
        `SELECT *
           FROM workflow_work_items
          WHERE ${conditions.join(" AND ")}
          ORDER BY createdAt ASC, id ASC`,
      )
      .all(...params) as WorkflowWorkItemRow[];
    return rows.map((row) => store.rowToWorkflowWorkItem(row));
}

export async function clearCompletionHandoffAcceptedMarkerImpl(store: TaskStore, taskId: string): Promise<void> {
        const layer = store.asyncLayer!;
    const existing = await getCompletionHandoffMarkerAsync(layer.db, taskId);
    if (!existing) return;
    await clearCompletionHandoffMarkerAsync(layer.db, taskId);
    void store.recordRunAuditEvent({
      taskId,
      agentId: "system",
      runId: `completion-handoff-clear:${taskId}:${Date.now()}`,
      domain: "database",
      mutationType: "task:completion-handoff-cleared",
      target: taskId,
      metadata: { taskId, acceptedAt: existing.acceptedAt, source: existing.source },
    });
    return;
}

export async function getCompletionHandoffAcceptedMarkerImpl(store: TaskStore, taskId: string): Promise<CompletionHandoffMarker | null> {
        const layer = store.asyncLayer!;
    const marker = await getCompletionHandoffMarkerAsync(layer.db, taskId);
    return marker as CompletionHandoffMarker | null;
}

export async function recordPluginActivationImpl(store: TaskStore, input: PluginActivationInput): Promise<PluginActivation> {
        const layer = store.asyncLayer!;
    return recordPluginActivationAsync(layer.db, input);
}

export async function enqueueMergeQueueImpl(store: TaskStore, taskId: string, opts: MergeQueueEnqueueOptions = {}): Promise<MergeQueueEntry> {
    /*
    FNXC:SqliteDualPathCleanup 2026-07-26-14:05:
    Merge-queue enqueue is PostgreSQL-only via enqueueMergeQueueAsync (column check, idempotent insert, audit). The SQLite enqueueMergeQueueSyncInternal arm is deleted.
    */
    /*
    FNXC:WorkflowResolvedColumns 2026-07-30-02:10:
    Resolve the task's OWN review columns before enqueueing. Without them the in-transaction guard
    falls back to `new Set(["in-review"])` and throws `MergeQueueInvalidColumnError` for a task
    resting in a renamed review lane, which breaks the merger and self-healing re-enqueue paths on
    every custom board. `undefined` on failure is deliberate and matches `moves.ts`: it makes the
    guard fall back to the legacy id rather than to an empty set that matches nothing.
    */
    /*
    FNXC:WorkflowResolvedColumns 2026-07-30-15:15 (#2819 review — greptile, "traitless workflows reject re-enqueue"):
    THREE STATES, NOT TWO. `undefined` (unreadable) was already handled. The missing one is an IR that
    resolves but carries NO lifecycle trait on any column: `synthesizeDefaultColumns` upgrades a v1
    graph by emitting the default columns with `traits: []`, so `resolveReviewColumns` returns EMPTY
    while the board's `in-review` column plainly exists and holds the card. Forwarding that empty set
    made the guard match nothing and throw `MergeQueueInvalidColumnError` — the very failure this
    conversion was fixing, moved from custom boards onto every pre-v2 project.

    Only a board that EXPRESSES traits and still has no review lane is answering the question; the
    other two states take the legacy id.
    */
    const reviewIr = await resolveWorkflowIrForTask(store, taskId).catch(() => undefined);
    const reviewColumns = reviewIr && declaresAnyLifecycleTrait(reviewIr)
      ? new Set(resolveReviewColumns(reviewIr))
      : undefined;
    return enqueueMergeQueueAsync(store.asyncLayer!, taskId, opts, undefined, reviewColumns);
}

export function cleanupStaleMergeQueueRowsImpl(store: TaskStore, now: string): void {
    const staleRows = store.db.prepare(`
      SELECT mq.taskId, mq.leasedBy, mq.leaseExpiresAt, t.column
        FROM mergeQueue mq
        LEFT JOIN tasks t ON t.id = mq.taskId
       WHERE t.id IS NULL OR t.column != 'in-review'
    `).all() as Array<{ taskId: string; leasedBy: string | null; leaseExpiresAt: string | null; column: Column | null }>;

    for (const staleRow of staleRows) {
      store.db.prepare("DELETE FROM mergeQueue WHERE taskId = ?").run(staleRow.taskId);
      store.insertRunAuditEventRow({
        taskId: staleRow.taskId,
        domain: "database",
        mutationType: "mergeQueue:auto-cleanup-stale-row",
        target: staleRow.taskId,
        metadata: {
          taskId: staleRow.taskId,
          column: staleRow.column,
          leasedBy: staleRow.leasedBy,
          leaseExpiresAt: staleRow.leaseExpiresAt,
          cleanedAt: now,
          reason: "not-in-review",
        },
      });
    }
}

export async function peekMergeQueueImpl(store: TaskStore): Promise<MergeQueueEntry[]> {
        const layer = store.asyncLayer!;
    return peekMergeQueueAsync(layer);
}

export async function peekMergeQueueHeadImpl(store: TaskStore): Promise<{ taskId: string; leasedBy: string | null; column: Column | null } | null> {
        const layer = store.asyncLayer!;
    const head = await peekMergeQueueHeadAsync(layer);
    // The async helper returns column as string | null (Drizzle text column);
    // cast to the Column union for the public API contract.
    return head ? { ...head, column: head.column as Column | null } : null;
}

export async function parseStepsFromPromptImpl(store: TaskStore, id: string): Promise<import("../types.js").TaskStep[]> {
    const dir = store.taskDir(id);
    const promptPath = join(dir, "PROMPT.md");
    if (!existsSync(promptPath)) return [];

    const content = await readFile(promptPath, "utf-8");
    // Step-inversion U12 (KTD-12): delegate to the registry's `step-headings`
    // parser (resolved by id, not a direct import) so the registry path is
    // proven and stays byte-identical to the extracted function. The parser
    // yields `{ name, dependsOn? }`; re-apply the `pending` status here.
    const parser = getStepParser("step-headings");
    if (!parser) {
      throw new Error("Step parser 'step-headings' is not registered");
    }
    return parser.parse(content).steps.map((s) =>
      s.dependsOn
        ? { name: s.name, status: "pending" as const, dependsOn: s.dependsOn }
        : { name: s.name, status: "pending" as const },
    );
}

export async function parseDependenciesFromPromptImpl(store: TaskStore, id: string): Promise<string[]> {
    const dir = store.taskDir(id);
    const promptPath = join(dir, "PROMPT.md");
    if (!existsSync(promptPath)) return [];

    const content = await readFile(promptPath, "utf-8");

    // Find the ## Dependencies section.
    // We locate the heading then slice to the next heading (or end of file)
    // to avoid multiline `$` anchor issues with lazy quantifiers.
    const headingMatch = content.match(/^##\s+Dependencies\s*$/m);
    if (!headingMatch) return [];

    const startIdx = headingMatch.index! + headingMatch[0].length;
    const rest = content.slice(startIdx);
    const nextHeading = rest.search(/\n##?\s/);
    const section = nextHeading === -1 ? rest : rest.slice(0, nextHeading);

    const ids: string[] = [];
    const taskIdRegex = /^-\s+\*\*Task:\*\*\s+([A-Z]+-\d+)/gm;
    let match;
    while ((match = taskIdRegex.exec(section)) !== null) {
      ids.push(match[1]);
    }

    return ids;
}

export async function parseFileScopeFromPromptImpl(store: TaskStore, id: string): Promise<string[]> {
    const dir = store.taskDir(id);
    const promptPath = join(dir, "PROMPT.md");
    if (!existsSync(promptPath)) return [];

    const content = await readFile(promptPath, "utf-8");

    return extractEffectiveWriteScopeFromPrompt(content);
}

export async function recordRunAuditEventBackendImpl(store: TaskStore,
    tx: DbTransaction,
    event: {
      domain: string;
      mutationType: string;
      target: string;
      taskId: string;
      agentId: string;
      runId: string;
      metadata: Record<string, unknown>;
    },
  ): Promise<void> {
    await recordRunAuditEventWithinTransaction(tx, {
      taskId: event.taskId,
      agentId: event.agentId,
      runId: event.runId,
      domain: event.domain as "database",
      mutationType: event.mutationType,
      target: event.target,
      metadata: event.metadata,
    });
}

export function rewriteLineageChildrenForRemovalImpl(store: TaskStore, parentId: string, childIds: string[]): Task[] {
    const rewrittenChildren: Task[] = [];

    for (const childId of childIds) {
      const childTask = store.readTaskFromDb(childId);
      if (!childTask || childTask.sourceParentTaskId !== parentId) continue;

      const updatedChild: Task = {
        ...childTask,
        sourceParentTaskId: undefined,
        updatedAt: new Date().toISOString(),
      };

      store.db.prepare("UPDATE tasks SET sourceParentTaskId = NULL, updatedAt = ? WHERE id = ?").run(updatedChild.updatedAt, updatedChild.id);
      if (store.isWatching) {
        store.taskCache.set(updatedChild.id, updatedChild);
      }
      rewrittenChildren.push(updatedChild);
    }

    return rewrittenChildren;
}

export async function syncAgentTaskLinkOnReassignmentImpl(store: TaskStore,
    taskId: string,
    previousAgentId: string | undefined,
    newAgentId: string | undefined,
  ): Promise<void> {
    const updatedAt = new Date().toISOString();

    /*
    FNXC:PostgresCutover 2026-07-04-00:00:
    Backend-mode agent-task-link sync: update the agents.taskId column via async Drizzle. Only the dedicated taskId column is authoritative in PG (agent.data jsonb is not read for the link), so the SQLite json_set/json_remove on data is not mirrored.
    */
        const db = store.asyncLayer!.db;
    if (previousAgentId) {
      await db
        .update(schema.project.agents)
        .set({ taskId: null, updatedAt })
        .where(and(eq(schema.project.agents.id, previousAgentId), eq(schema.project.agents.taskId, taskId)));
    }
    if (newAgentId) {
      await db
        .update(schema.project.agents)
        .set({ taskId, updatedAt })
        .where(eq(schema.project.agents.id, newAgentId));
    }
    return;
}

export async function runGitCommandImpl(store: TaskStore, command: string, timeoutMs = 10_000) {
    return runCommandAsync(command, {
      cwd: store.rootDir,
      timeoutMs,
      maxBuffer: 10 * 1024 * 1024,
    });
}

export async function clearStaleExecutionStartBranchReferencesImpl(store: TaskStore, deletedBranches: string[], ownerTaskId?: string): Promise<string[]> {
    if (deletedBranches.length === 0) return [];
        /*
    FNXC:PostgresBranchCleanup 2026-07-14-17:30:
    Deleted execution-start branches must be cleared from every other live task in PostgreSQL. Returning an empty safe default leaves durable references to branches that no longer exist and turns later worktree creation into a false hard failure.
    */
    const now = new Date().toISOString();
    const conditions = [
      isNull(schema.project.tasks.deletedAt),
      inArray(schema.project.tasks.executionStartBranch, deletedBranches),
    ];
    if (ownerTaskId) conditions.push(ne(schema.project.tasks.id, ownerTaskId));
    const rows = await store.asyncLayer!.db
      .update(schema.project.tasks)
      .set({ executionStartBranch: null, updatedAt: now })
      .where(and(...conditions))
      .returning({ id: schema.project.tasks.id });
    const clearedIds = rows.map((row) => row.id);
    if (store.isWatching) {
      for (const id of clearedIds) {
        const cached = store.taskCache.get(id);
        if (cached) {
          cached.executionStartBranch = undefined;
          cached.updatedAt = now;
        }
      }
    }
    return clearedIds;
}

export async function archiveAllDoneImpl(store: TaskStore, options?: { removeLineageReferences?: boolean }): Promise<Task[]> {
    /*
    FNXC:WorkflowLifecycleColumns 2026-08-01-05:00:
    "Archive all done" archived NOTHING on a renamed board.

    `listTasks({ column })` filters in the store, so this read returned an empty array and the button
    completed successfully having archived zero cards — an operator action that silently does nothing
    is worse than one that errors, because the board simply looks unchanged.

    Project-level resolution: a read has no task in hand. The legacy id is unioned in, so a board
    mid-rename still archives rows stored under the old one, and the set is deduped by id because one
    column can carry both complete and archived.
    */
    const completeColumns = await resolveProjectColumnsForRoles(store, ["complete"]);
    const doneById = new Map<string, Task>();
    for (const column of completeColumns) {
      for (const task of await store.listTasks({ slim: true, column })) doneById.set(task.id, task);
    }
    const doneTasks = [...doneById.values()];

    if (doneTasks.length === 0) {
      return [];
    }

    // Archive all done tasks concurrently
    const archivedTasks = await Promise.all(
      doneTasks.map((task) =>
        store.archiveTask(task.id, {
          cleanup: true,
          removeLineageReferences: options?.removeLineageReferences,
        })
      )
    );

    return archivedTasks;
}

/*
FNXC:WorkflowLifecycleColumns 2026-08-02-16:25 (fleet: the UNARCHIVE destination):
WHERE A RESTORED CARD LANDS is three lifecycle decisions in four lines, and all three were literals:
  - no usable pre-archive column -> the COMPLETE lane (a restored card with no history is finished work);
  - it was mid-flight (wip or review) -> the HOLD lane, because its worktree and session are long gone;
  - otherwise -> back where it was.

On a renamed board the first fell back to `done` (a column that may not exist), the second never matched — so
a card archived FROM the wip lane was restored straight back INTO it with no worktree, which the scheduler
then treats as a live holder occupying a slot. That is the worst of the three: it does not just misfile the
card, it consumes capacity.

ASYNC because the answer needs the workflow. Its one production caller (`archive-lifecycle-2`'s unarchive) is
already async, and the sync alternative is the PostgreSQL no-op documented in #2703. `taskId` is now required
so the lanes can be resolved for the card being restored rather than for the board in general.
*/
export async function resolveUnarchiveTargetColumnImpl(
  store: TaskStore,
  preArchiveColumn: unknown,
  taskId?: string,
): Promise<Column> {
    /*
    FNXC:WorkflowLifecycleColumns 2026-08-02-19:10 (PR #2742 review — greptile P1, and this is the THIRD time
    I have made this exact mistake in one session):
    `?? legacyId` IS ONLY CORRECT WHEN THE RESOLVER RETURNED NOTHING. My first version wrote
    `lifecycle?.complete ?? "done"` and `lifecycle?.hold ?? "todo"`, so a workflow that resolves but declares
    no complete (or no hold) lane got an UNDECLARED column — and `unarchiveTaskImpl` writes this destination
    DIRECTLY to the row, bypassing moveTask's unknown-column validation. That persists a column the board does
    not have; the card then renders nowhere and no guard can find it.

    The rule, stated for the third time because I keep needing it: a resolved struct with a MISSING FIELD is an
    answer — "this board has no such lane" — and `?? legacy` discards exactly that answer. The two cases are:
      - lifecycle undefined (v1 IR / unresolvable): the legacy ids ARE the answer.
      - lifecycle resolved, field absent: refuse. Restoring into an invented column is worse than refusing to
        restore, because the refusal is visible and the invented column is not.

    Earlier occurrences: #2733 (`applyPrMergedTransition`'s move target) and moveToDoneImpl in this same PR.
    */
    const lifecycle = taskId ? await resolveTaskLifecycleColumns(store, taskId) : undefined;
    /* The board's declared ids, for the "is this pre-archive column usable?" test below. */
    const declaredColumnIds = new Set<string>(
      taskId && lifecycle
        ? ((await resolveWorkflowIrForTask(store, taskId).catch(() => undefined)) as { columns?: Array<{ id: string }> } | undefined)
            ?.columns?.map((column) => column.id) ?? []
        : [],
    );
    const completeColumn = (lifecycle ? lifecycle.complete : "done") as Column | undefined;
    const holdColumn = (lifecycle ? lifecycle.hold : "todo") as Column | undefined;
    const wipColumn = lifecycle?.wip ?? "in-progress";
    const reviewColumn = lifecycle?.review ?? "in-review";
    const archivedColumn = lifecycle?.archived ?? "archived";

    /*
    FNXC:WorkflowLifecycleColumns 2026-08-02-19:45 (found by my OWN test, and it is a bigger defect than the
    one I came here to fix):
    `isColumn` TESTS THE CLOSED LEGACY ENUM, so on a renamed board it rejects every declared column id — and
    this branch then treats a perfectly good pre-archive column as "unusable" and restores the card to the
    COMPLETE lane. Every restore on a renamed board landed in Done, whatever the card was doing when it was
    archived.

    My lane conversion could not have helped while this stood: I converted the comparisons below and the
    branch above them still swallowed every renamed id first. That is the half-conversion shape this program
    keeps finding, in my own work, one line up from the part I was looking at — which is the argument for
    reading the whole function rather than the sites the census points at.

    `isColumn` is correct for legacy ids and its own doc says workflow-scoped validity belongs to
    `workflowHasColumn`. Accepting a column the RESOLVED workflow declares, and falling back to the enum when
    there is no workflow, keeps both boards right.
    */
    const declaresPreArchiveColumn = typeof preArchiveColumn === "string"
      && (lifecycle !== undefined
        ? declaredColumnIds.has(preArchiveColumn)
        : isColumn(preArchiveColumn));
    if (!declaresPreArchiveColumn || preArchiveColumn === archivedColumn || preArchiveColumn === "archived") {
      if (completeColumn === undefined) {
        throw new Error(`Cannot resolve an unarchive target${taskId ? ` for ${taskId}` : ""}: its workflow declares no complete column`);
      }
      return completeColumn;
    }
    if (preArchiveColumn === wipColumn || preArchiveColumn === reviewColumn) {
      if (holdColumn === undefined) {
        throw new Error(`Cannot resolve an unarchive target${taskId ? ` for ${taskId}` : ""}: its workflow declares no hold column`);
      }
      return holdColumn;
    }
    return preArchiveColumn as Column;
}

export async function readPreArchiveColumnFromTaskFileImpl(store: TaskStore, dir: string): Promise<Column | undefined> {
    try {
      const raw = await readFile(join(dir, "task.json"), "utf-8");
      const parsed = JSON.parse(raw) as { preArchiveColumn?: unknown };
      /*
      FNXC:WorkflowLifecycleColumns 2026-08-02-19:55 (the same `isColumn` defect, one function over):
      `isColumn` TESTS THE CLOSED LEGACY ENUM, so a renamed board's stored `preArchiveColumn` was DROPPED on
      read — the restore then saw `undefined` and treated the card as having no usable history. Two legacy-enum
      gates in one path, both upstream of the lane comparisons I came here to convert.

      A stored pre-archive column is DATA, not a claim: whatever id the row carries is what the card was in when
      it was archived, and validating it against a closed enum is what loses renamed boards' history. The
      destination resolver downstream decides whether the id is still usable, and now does so against the
      workflow's declared columns.
      */
      return typeof parsed.preArchiveColumn === "string" && parsed.preArchiveColumn.length > 0
        ? parsed.preArchiveColumn as Column
        : undefined;
    } catch {
      return undefined;
    }
}

export async function moveToDoneImpl(store: TaskStore, task: Task, dir: string): Promise<void> {
    /*
    FNXC:WorkflowLifecycleColumns 2026-08-02-16:10 (fleet: the archive/complete writer):
    THE GUARD, THE WRITE AND THE EVENT are one decision and now share one snapshot. This function writes
    `task.column` DIRECTLY (it is the store's own finaliser, not a moveTask caller), so a literal here is not
    caught by moveTask's unknown-column validation the way every converted call site is — it silently persists
    a column the board does not declare, and then emits `to: "done"` to every listener.

    That makes this one of the few sites where a literal writes bad state rather than failing to act. On a
    renamed board: the already-complete short-circuit never fired (so the finaliser re-ran and re-stamped
    executionCompletedAt), the row was written to `done` instead of the board's completion column, and the
    event told the GitHub tracking poster and the auto-merge handoff about a column that does not exist.

    A workflow that declares columns but NO complete lane refuses rather than inventing one — the distinction
    #2733 settled: a missing field on a resolved struct is an answer, and `?? legacy` discards it.
    */
    const completeLifecycle = await resolveTaskLifecycleColumns(store, task.id);
    const completeColumn = completeLifecycle ? completeLifecycle.complete : "done";
    if (completeColumn === undefined) {
      throw new Error(`Cannot move ${task.id} to a completion column: its workflow declares none`);
    }
    if (task.column === completeColumn) {
      return;
    }

    const fromColumn = task.column;
    /*
    FNXC:WorkflowResolvedColumns 2026-07-30-01:10 (unwired-parameter class, cf. #2803):
    THE OUTER QUESTION WAS RESOLVED AND THE INNER ONE WAS NOT — in the same function, four lines apart.
    `completeColumn` above comes from the task's workflow, then this call re-asked with the literal and
    refused: on a renamed board the completion move threw

        Cannot move FN-1 to done: task is in 'checking', must be in 'in-review'

    for a card sitting correctly in its own review lane. `getTaskMergeBlocker`'s own note calls out this
    exact half-conversion shape in `moves.ts`; this is the same shape in a second site it did not cover.

    MEMBERSHIP via `resolveReviewColumns` (mergeOrchestration ∪ mergeBlocker ∪ humanReview), so a board
    splitting those across columns has all of them accepted, unioned with the legacy id because
    `resolveWorkflowIrForTask` degrades to the BUILT-IN IR rather than throwing.
    */
    /*
    FNXC:WorkflowResolvedColumns 2026-07-30-14:10 (#2820 review — coderabbit, Major):
    THE LEGACY ID IS A FALLBACK, NOT A MEMBER. My first version pre-seeded `in-review` into the set and
    unioned the resolved lanes on top. That admits a board which declares `in-review` as its WIP column:
    a card mid-implementation would pass the merge-identity check and merge prematurely.

    The legacy id is only correct when the board tells us NOTHING — an empty resolved set, or a
    resolution that threw. A non-empty resolved answer replaces it outright; that is the same
    "unscoped legacy acceptance" the glasses plugin's own review caught, and I reintroduced it here.
    */
    let reviewColumns: ReadonlySet<string> = new Set<string>(["in-review"]);
    try {
      const ir = await resolveWorkflowIrForTask(store, task.id);
      const resolved = ir ? resolveReviewColumns(ir) : [];
      if (resolved.length > 0) reviewColumns = new Set(resolved);
    } catch { /* degraded: the board told us nothing, so the legacy id stands */ }
    const mergeBlocker = getTaskMergeBlocker(task, { reviewColumns });
    if (mergeBlocker) {
      throw new Error(`Cannot move ${task.id} to done: ${mergeBlocker}`);
    }

    task.column = completeColumn;
    store.clearDoneTransientFields(task);
    task.columnMovedAt = new Date().toISOString();
    task.updatedAt = task.columnMovedAt;
    if (!task.executionCompletedAt) {
      task.executionCompletedAt = task.columnMovedAt;
    }

    await store.atomicWriteTaskJson(dir, task);

    // Update cache if watcher is active
    if (store.isWatching) store.taskCache.set(task.id, { ...task });

    store.emit("task:moved", { task, from: fromColumn, to: completeColumn as Column, source: "engine" });
}

export function clearDoneTransientFieldsImpl(store: TaskStore, task: Task): boolean {
    const changed = task.status !== undefined
      || task.error !== undefined
      || task.worktree !== undefined
      || task.blockedBy !== undefined
      || task.overlapBlockedBy !== undefined
      || task.recoveryRetryCount !== undefined
      || task.nextRecoveryAt !== undefined
      || task.paused !== undefined
      || task.userPaused !== undefined
      || task.pausedByAgentId !== undefined
      || task.pausedReason !== undefined;

    task.status = undefined;
    task.error = undefined;
    task.worktree = undefined;
    task.blockedBy = undefined;
    task.overlapBlockedBy = undefined;
    task.recoveryRetryCount = undefined;
    task.nextRecoveryAt = undefined;
    task.paused = undefined;
    task.userPaused = undefined;
    task.pausedByAgentId = undefined;
    task.pausedReason = undefined;

    return changed;
}

export function stopWatchingImpl(store: TaskStore): void {
    if (store.watcher) {
      store.watcher.close();
      store.watcher = null;
    }
    if (store.pollInterval) {
      clearInterval(store.pollInterval);
      store.pollInterval = null;
    }
    for (const timer of store.debounceTimers.values()) {
      clearTimeout(timer);
    }
    store.debounceTimers.clear();
    store.taskCache.clear();
    store.recentlyWritten.clear();
    store.clearStartupSlimListMemo();
}

export async function getAttachmentImpl(store: TaskStore,
    id: string,
    filename: string,
  ): Promise<{ path: string; mimeType: string }> {
    const dir = store.taskDir(id);
    const task = await store.readTaskJson(dir);
    const attachment = task.attachments?.find((a) => a.filename === filename);
    if (!attachment) {
      const err: NodeJS.ErrnoException = new Error(
        `Attachment '${filename}' not found on task ${id}`,
      );
      err.code = "ENOENT";
      throw err;
    }
    return {
      path: join(dir, "attachments", filename),
      mimeType: attachment.mimeType,
    };
}

export async function emitUsageEventImpl(store: TaskStore, event: UsageEventInput): Promise<boolean> {
        const layer = store.asyncLayer!;
    return emitUsageEventAsync(layer.db, layer.projectId ?? "", event);
}

export async function addSteeringCommentImpl(store: TaskStore, id: string, text: string, author: "user" | "agent" = "user", runContext?: RunMutationContext): Promise<Task> {
    // Write to unified comments (skip refinement — steering is for agent injection, not follow-up tasks)
    const task = await store.addComment(id, text, author, { skipRefinement: true }, runContext);

    // Also write to steeringComments so the executor's real-time injection listener can detect new entries
    const updated = await store.withTaskLock(id, async () => {
      const dir = store.taskDir(id);
      const currentTask = await store.readTaskJson(dir);

      const steeringComment: import("../types.js").SteeringComment = {
        id: task.comments![task.comments!.length - 1].id,
        text,
        createdAt: new Date().toISOString(),
        author,
      };

      if (!currentTask.steeringComments) {
        currentTask.steeringComments = [];
      }
      currentTask.steeringComments.push(steeringComment);
      currentTask.updatedAt = new Date().toISOString();

      await store.atomicWriteTaskJson(dir, currentTask);
      if (store.isWatching) store.taskCache.set(id, { ...currentTask });

      store.emit("task:updated", currentTask);
      return currentTask;
    });

    return updated;
}

export async function updateTaskCommentImpl(store: TaskStore, id: string, commentId: string, text: string): Promise<Task> {
    {
      const layer = store.asyncLayer!;
      const state = await getLiveTaskColumn(layer.db, id, layer.projectId, await resolveArchivedLanes(store));
      if (state === "archived") throw new Error(`Task ${id} is archived — comments are read-only`);
      if (state === null) throw new Error(`Task ${id} not found`);
    }
    return store.withTaskLock(id, async () => {
      const dir = store.taskDir(id);
      const task = await store.readTaskJson(dir);
      const comments = task.comments || [];
      const comment = comments.find((entry) => entry.id === commentId);

      if (!comment) {
        throw new Error(`Comment ${commentId} not found on task ${id}`);
      }

      comment.text = text;
      comment.updatedAt = new Date().toISOString();
      task.comments = comments;
      task.updatedAt = comment.updatedAt;
      task.log.push({
        timestamp: task.updatedAt,
        action: "Comment updated",
      });

      await store.atomicWriteTaskJson(dir, task);
      if (store.isWatching) store.taskCache.set(id, { ...task });

      store.emit("task:updated", task);
      return task;
    });
}

export async function deleteTaskCommentImpl(store: TaskStore, id: string, commentId: string): Promise<Task> {
    {
      const layer = store.asyncLayer!;
      const state = await getLiveTaskColumn(layer.db, id, layer.projectId, await resolveArchivedLanes(store));
      if (state === "archived") throw new Error(`Task ${id} is archived — comments are read-only`);
      if (state === null) throw new Error(`Task ${id} not found`);
    }
    return store.withTaskLock(id, async () => {
      const dir = store.taskDir(id);
      const task = await store.readTaskJson(dir);
      const currentComments = task.comments || [];
      const nextComments = currentComments.filter((entry) => entry.id !== commentId);

      if (nextComments.length === currentComments.length) {
        throw new Error(`Comment ${commentId} not found on task ${id}`);
      }

      task.comments = nextComments.length > 0 ? nextComments : undefined;
      task.updatedAt = new Date().toISOString();
      task.log.push({
        timestamp: task.updatedAt,
        action: "Comment deleted",
      });

      await store.atomicWriteTaskJson(dir, task);
      if (store.isWatching) store.taskCache.set(id, { ...task });

      store.emit("task:updated", task);
      return task;
    });
}

export async function writeArtifactDataImpl(store: TaskStore, input: ArtifactCreateInput, id: string): Promise<{ uri?: string; sizeBytes?: number; absolutePath?: string }> {
    if (!input.data) {
      return {};
    }

    const storedName = TaskStore.artifactStoredName(id, input.title);
    if (input.taskId) {
      const artifactDir = join(store.taskDir(input.taskId), "artifacts");
      await mkdir(artifactDir, { recursive: true });
      const absolutePath = join(artifactDir, storedName);
      await writeFile(absolutePath, input.data);
      return { uri: `artifacts/${storedName}`, sizeBytes: input.data.length, absolutePath };
    }

    const artifactDir = store.artifactRegistryDir();
    await mkdir(artifactDir, { recursive: true });
    const absolutePath = join(artifactDir, storedName);
    await writeFile(absolutePath, input.data);
    return { uri: `artifacts/${storedName}`, sizeBytes: input.data.length, absolutePath };
}

export function insertArtifactRowImpl(store: TaskStore, input: ArtifactCreateInput, id: string, now: string, stored: { uri?: string; sizeBytes?: number }): Artifact {
    store.db.prepare(
      `INSERT INTO artifacts (
        id, type, title, description, mimeType, sizeBytes, uri, content, authorId, authorType, taskId, metadata, createdAt, updatedAt
      ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`,
    ).run(
      id,
      input.type,
      input.title,
      input.description ?? null,
      input.mimeType ?? null,
      stored.sizeBytes ?? input.sizeBytes ?? null,
      stored.uri ?? input.uri ?? null,
      input.data ? null : input.content ?? null,
      input.authorId,
      input.authorType,
      input.taskId ?? null,
      toJsonNullable(input.metadata),
      now,
      now,
    );

    const row = store.db.prepare("SELECT * FROM artifacts WHERE id = ?").get(id) as ArtifactRow | undefined;
    if (!row) {
      throw new Error(`Failed to register artifact ${id}`);
    }
    return store.rowToArtifact(row);
}

export async function getArtifactImpl(store: TaskStore, id: string): Promise<Artifact | null> {
        const layer = store.asyncLayer!;
    return getArtifactAsync(layer.db, id);
}

/**
 * FNXC:ArtifactRegistry 2026-07-10-15:20 (merge port from main):
 * The dashboard Artifacts view lets operators edit any inline-content document artifact in place
 * (title/description/content). Binary artifacts (rows with a uri) keep content non-editable because
 * their payload lives on disk; only metadata edits are allowed there. Archived-task artifacts stay
 * read-only, mirroring registerArtifact. Emits `artifact:updated` and bumps lastModified so open
 * artifact lists live-refresh.
 */
export async function updateArtifactImpl(store: TaskStore, id: string, updates: { title?: string; description?: string; content?: string }): Promise<Artifact> {
        const layer = store.asyncLayer!;
    const updated = await updateArtifactRowAsync(layer, id, updates, await resolveArchivedLanes(store));
    store.emit("artifact:updated", updated);
    return updated;
}

export async function getArtifactsImpl(store: TaskStore, taskId: string): Promise<Artifact[]> {
        const layer = store.asyncLayer!;
    return getArtifactsAsync(layer.db, taskId, layer.projectId, await resolveArchivedLanes(store));
}

export async function getTaskDocumentsImpl(store: TaskStore, taskId: string): Promise<TaskDocument[]> {
        const layer = store.asyncLayer!;
    return listTaskDocumentsAsync(layer.db, taskId, layer.projectId, await resolveArchivedLanes(store));
}

export async function getTaskDocumentImpl(store: TaskStore, taskId: string, key: string): Promise<TaskDocument | null> {
        const layer = store.asyncLayer!;
    return getTaskDocumentAsync(layer.db, taskId, key, layer.projectId, await resolveArchivedLanes(store));
}

export async function getTaskDocumentRevisionsImpl(store: TaskStore,
    taskId: string,
    key: string,
    options?: { limit?: number },
  ): Promise<TaskDocumentRevision[]> {
    /*
    FNXC:PostgresCutover 2026-07-04:
    Backend-mode read of task_document_revisions via the async Drizzle helper.
    The helper returns revisions newest-first by createdAt; the sync SQLite
    path orders by revision DESC, so we re-sort by revision descending in JS
    to preserve that ordering exactly, then apply the optional LIMIT.
    */
        const layer = store.asyncLayer!;
    const rows = await getTaskDocumentRevisionsAsync(layer.db, taskId, key, layer.projectId, await resolveArchivedLanes(store));
    const sorted = [...rows].sort((a, b) => b.revision - a.revision);
    const mapped = sorted.map((row) => store.rowToTaskDocumentRevision(row));
    return options?.limit !== undefined ? mapped.slice(0, Math.max(0, options.limit)) : mapped;
}

export async function deleteTaskDocumentImpl(store: TaskStore, taskId: string, key: string): Promise<void> {
    /*
    FNXC:PostgresCutover 2026-07-04:
    Backend-mode delete via the async Drizzle helper (deleteTaskDocument in
    async-comments-attachments.ts). The helper verifies existence (throwing the
    same "not found" error) and removes revisions + document in one transaction.
    The post-delete task:updated emit mirrors the SQLite path; getTask returns
    only live tasks so a present task implies deletedAt == null.
    */
        const layer = store.asyncLayer!;
    await deleteTaskDocumentAsync(layer, taskId, key, await resolveArchivedLanes(store));
    const task = await store.getTask(taskId);
    if (task) {
      store.emit("task:updated", task);
    }
    return;
}

export function resolvePrimaryPrInfoImpl(store: TaskStore, prInfos: import("../types.js").PrInfo[]): import("../types.js").PrInfo | undefined {
    // Primary selection rule: prefer the most-recently-updated open PR; if none are open,
    // fall back to the first linked PR for stable back-compat rendering.
    const openPrs = prInfos.filter((entry) => entry.status === "open");
    if (openPrs.length === 0) return prInfos[0];
    const sorted = [...openPrs].sort((a, b) => {
      const aTs = Date.parse(a.lastCheckedAt ?? a.lastCommentAt ?? "");
      const bTs = Date.parse(b.lastCheckedAt ?? b.lastCommentAt ?? "");
      if (Number.isFinite(aTs) && Number.isFinite(bTs)) return bTs - aTs;
      if (Number.isFinite(aTs)) return -1;
      if (Number.isFinite(bTs)) return 1;
      return 0;
    });
    return sorted[0] ?? prInfos[0];
}

export function upsertPrInfoByNumberImpl(store: TaskStore, prInfos: import("../types.js").PrInfo[], prInfo: import("../types.js").PrInfo): import("../types.js").PrInfo[] {
    const idx = prInfos.findIndex((entry) => entry.number === prInfo.number);
    if (idx >= 0) {
      const next = [...prInfos];
      next[idx] = { ...next[idx], ...prInfo };
      return next;
    }
    return [prInfo, ...prInfos];
}

export async function addPrInfoImpl(store: TaskStore, id: string, prInfo: import("../types.js").PrInfo): Promise<Task | undefined> {
    return store.withTaskLock(id, async () => {
      const dir = store.taskDir(id);
      const task = await store.readTaskJson(dir);
      let prInfos = store.getTaskPrInfos(task);
      const existingIndex = prInfos.findIndex((entry) => entry.number === prInfo.number);
      if (existingIndex >= 0) {
        prInfos[existingIndex] = { ...prInfos[existingIndex], ...prInfo };
      } else {
        prInfos = [prInfo, ...prInfos];
      }
      task.prInfos = prInfos;
      task.prInfo = store.resolvePrimaryPrInfo(prInfos);
      task.updatedAt = new Date().toISOString();
      await store.atomicWriteTaskJson(dir, task);
      if (store.isWatching) store.taskCache.set(id, { ...task });
      store.emit("task:updated", task);
      return task;
    });
}

export async function updatePrInfoByNumberImpl(store: TaskStore, id: string, number: number, patch: Partial<import("../types.js").PrInfo>): Promise<Task | undefined> {
    return store.withTaskLock(id, async () => {
      const dir = store.taskDir(id);
      const task = await store.readTaskJson(dir);
      const prInfos = store.getTaskPrInfos(task);
      const index = prInfos.findIndex((entry) => entry.number === number);
      if (index < 0) {
        storeLog.warn(`[store] updatePrInfoByNumber: PR #${number} not found for ${id}`);
        return task;
      }
      prInfos[index] = { ...prInfos[index], ...patch };
      task.prInfos = prInfos;
      task.prInfo = store.resolvePrimaryPrInfo(prInfos);
      task.updatedAt = new Date().toISOString();
      await store.atomicWriteTaskJson(dir, task);
      if (store.isWatching) store.taskCache.set(id, { ...task });
      store.emit("task:updated", task);
      return task;
    });
}

export async function removePrInfoByNumberImpl(store: TaskStore, id: string, number: number): Promise<Task | undefined> {
    return store.withTaskLock(id, async () => {
      const dir = store.taskDir(id);
      const task = await store.readTaskJson(dir);
      const prInfos = store.getTaskPrInfos(task).filter((entry) => entry.number !== number);
      if ((task.prInfos ?? []).length === prInfos.length && task.prInfo?.number !== number) {
        storeLog.warn(`[store] removePrInfoByNumber: PR #${number} not found for ${id}`);
        return task;
      }
      task.prInfos = prInfos.length > 0 ? prInfos : undefined;
      task.prInfo = store.resolvePrimaryPrInfo(prInfos);
      task.updatedAt = new Date().toISOString();
      await store.atomicWriteTaskJson(dir, task);
      if (store.isWatching) store.taskCache.set(id, { ...task });
      store.emit("task:updated", task);
      return task;
    });
}

export async function updateGithubTrackingImpl(store: TaskStore,
    id: string,
    tracking: import("../types.js").TaskGithubTracking | null,
  ): Promise<Task> {
    return store.withTaskLock(id, async () => {
      const dir = store.taskDir(id);
      const task = await store.readTaskJson(dir);
      const nextTracking = tracking ?? undefined;
      const previousTracking = task.githubTracking;

      if (JSON.stringify(previousTracking ?? null) === JSON.stringify(nextTracking ?? null)) {
        return task;
      }

      task.githubTracking = nextTracking;
      task.log.push({
        timestamp: new Date().toISOString(),
        action: tracking?.enabled === false ? "GitHub tracking disabled" : "GitHub tracking enabled",
      });
      task.updatedAt = new Date().toISOString();

      await store.atomicWriteTaskJson(dir, task);
      if (store.isWatching) store.taskCache.set(id, { ...task });
      store.emit("task:updated", task);
      return task;
    });
}

export async function linkGithubIssueImpl(store: TaskStore,
    id: string,
    issue: import("../types.js").TaskGithubTrackedIssue,
  ): Promise<Task> {
    return store.withTaskLock(id, async () => {
      const dir = store.taskDir(id);
      const task = await store.readTaskJson(dir);
      const previous = task.githubTracking ?? {};

      const nextTracking: import("../types.js").TaskGithubTracking = {
        ...previous,
        issue,
        enabled: previous.enabled ?? true,
      };

      if (JSON.stringify(previous) === JSON.stringify(nextTracking)) {
        return task;
      }

      task.githubTracking = nextTracking;
      task.log.push({
        timestamp: new Date().toISOString(),
        action: "GitHub issue linked",
        outcome: `${issue.owner}/${issue.repo}#${issue.number}`,
      });
      task.updatedAt = new Date().toISOString();

      await store.atomicWriteTaskJson(dir, task);
      if (store.isWatching) store.taskCache.set(id, { ...task });
      store.emit("task:updated", task);
      return task;
    });
}

/*
FNXC:AgentLogRead 2026-07-16-00:00:
Issue #2149 requires read-only type filtering to reach the file store before pagination so task-chat log pages and their totals are coherent.
*/
export async function getAgentLogsImpl(store: TaskStore,
    taskId: string,
    options?: { limit?: number; offset?: number; type?: AgentLogEntry["type"] },
  ): Promise<AgentLogEntry[]> {
    // Ensure buffered entries are visible before reading.
    store.flushAgentLogBuffer();
    // FNXC:RuntimeTaskOrchestrationAsync 2026-06-24-15:45:
    // Backend mode: skip the sync readTaskFromDb deleted-check.
    
    const limit = options?.limit !== undefined
      ? (Number.isFinite(options.limit) ? Math.max(0, Math.floor(options.limit)) : 0)
      : undefined;
    const offset = options?.offset !== undefined
      ? (Number.isFinite(options.offset) ? Math.max(0, Math.floor(options.offset)) : 0)
      : 0;

    if (limit === 0) return [];

    return readAgentLogEntries(store.taskDir(taskId), { limit, offset, type: options?.type }).map(
      ({ lineNo: _lineNo, sourceRef: _sourceRef, ...entry }) => entry,
    );
}

export async function getAgentLogCountImpl(
  store: TaskStore,
  taskId: string,
  options?: { type?: AgentLogEntry["type"] },
): Promise<number> {
    store.flushAgentLogBuffer();
    // FNXC:RuntimeTaskOrchestrationAsync 2026-06-24-15:45:
    // Backend mode: skip the sync readTaskFromDb check. The agent log file
    // is read from the file system regardless; the deleted-task check is a
    // best-effort optimization that is not critical for the archive path.
    
    return countAgentLogEntries(store.taskDir(taskId), { type: options?.type });
}