diff --git a/layers/artifact-delivery/server/tasks/sweep-skill-runs.ts b/layers/artifact-delivery/server/tasks/sweep-skill-runs.ts
index 7fe8c2dd..7694be06 100644
--- a/layers/artifact-delivery/server/tasks/sweep-skill-runs.ts
+++ b/layers/artifact-delivery/server/tasks/sweep-skill-runs.ts
@@ -7,15 +7,17 @@ import { reportJobRun } from '~~/server/utils/sync-job-reporter'
 import { observedSchedulePolicy } from '#shared/schedule-policy'
 import { enqueueArtifactBuild } from '../utils/queue'
 import { fetchAdmittedSkillIdentity, requestResolution } from '../utils/request-resolution'
+import { pruneSettledResolutions } from '../utils/resolution-retention'
 import { runSkillRunSweep } from '../utils/run-sweep'
 
 const CRON = '7,22,37,52 * * * *'
 /**
- * 40 checks every 15 minutes is 3,840 a day. The registry indexed 5,949 Skills
- * on 2026-10-07, so one cycle takes about 37 hours. A ready build of the same
- * commit is reused without a GitHub read, so a repeat check of an unchanged
- * Skill costs D1 rows only. A first check loads from GitHub with about 8 REST
- * requests, so a cycle of first checks spends about 1,300 an hour.
+ * At most 40 checks every 15 minutes. A ready Skill is checked weekly and a
+ * failing one daily (`RECHECK_AFTER_SECONDS`), so most runs start few checks.
+ * Each check still writes a Resolution with about 60 KB of attestations, even
+ * when it reuses a ready build. Checking every Skill hourly filled the 10 GB
+ * database on 2026-11-04. A first check loads from GitHub with about 8 REST
+ * requests.
  */
 const BATCH_SIZE = 40
 
@@ -42,6 +44,11 @@ export default defineScheduledTask({
       return { result: { error: 'no-db' } }
     }
 
+    // Prune before the observed run records its start: a full database refuses
+    // that insert, and only a delete can free the space it needs.
+    const pruned = await pruneSettledResolutions(db, { now: Math.floor(Date.now() / 1000) })
+    emitOperationalEvent(createWideEvent({ 'operation': 'prune-resolutions', 'outcome': 'completed', 'processed.count': pruned }), 'info')
+
     return await runObservedScheduledTask({
       db,
       env,
diff --git a/layers/artifact-delivery/server/utils/resolution-retention.ts b/layers/artifact-delivery/server/utils/resolution-retention.ts
new file mode 100644
index 00000000..64d87150
--- /dev/null
+++ b/layers/artifact-delivery/server/utils/resolution-retention.ts
@@ -0,0 +1,74 @@
+/// <reference types="@cloudflare/workers-types" />
+
+/**
+ * How long a settled public Resolution is kept.
+ *
+ * The CLI reads a Resolution only while its build runs, and gives up after 60
+ * seconds. A run check settles on the next sweep run, 15 minutes later. Three
+ * days leaves the daily check-in its own window and a day to spare.
+ */
+export const RESOLUTION_RETENTION_SECONDS = 3 * 24 * 60 * 60
+
+/**
+ * Resolutions one prune may delete. Each carries about 60 KB of attestations,
+ * so one batch frees about 30 MB and keeps each D1 statement small.
+ */
+export const RESOLUTION_PRUNE_BATCH = 500
+
+/**
+ * Settled public Resolutions nothing needs any more.
+ *
+ * A Resolution stays while:
+ * - it is private, because private Artifacts and their grants hang off it;
+ * - it is newer than the retention window;
+ * - a run check still reads it;
+ * - a download grant names it;
+ * - it is ready and holds the newest attestation of its Artifact, which build
+ *   reuse copies and the Artifact routes serve.
+ *
+ * Deleting one cascades to its attestation, check results, and requester rows.
+ * The first filters repeat `idx_artifact_resolutions_state`, so the scan reads
+ * only settled rows older than the window.
+ */
+const PRUNE_CANDIDATES = `
+  SELECT r.id
+  FROM artifact_resolutions r INDEXED BY idx_artifact_resolutions_state
+  WHERE r.state IN ('ready', 'blocked', 'failed', 'revoked')
+    AND r.updated_at < ?1
+    AND r.visibility = 'public'
+    AND r.id NOT IN (
+      SELECT pending_resolution_id FROM artifact_run_checks WHERE pending_resolution_id IS NOT NULL
+      UNION
+      SELECT settled_resolution_id FROM artifact_run_checks WHERE settled_resolution_id IS NOT NULL
+      UNION
+      SELECT resolution_id FROM artifact_download_grants
+    )
+    AND (
+      r.state <> 'ready'
+      OR EXISTS (
+        SELECT 1
+        FROM artifact_attestations own
+        JOIN artifact_attestations newer
+          ON newer.artifact_id = own.artifact_id
+         AND (newer.created_at, newer.resolution_id) > (own.created_at, own.resolution_id)
+        WHERE own.resolution_id = r.id
+      )
+    )
+  LIMIT ?2
+`
+
+/**
+ * Delete one batch of settled public Resolutions nothing needs.
+ *
+ * Returns how many it deleted. A full batch means more remain.
+ */
+export async function pruneSettledResolutions(
+  db: D1Database,
+  input: { now: number, retentionSeconds?: number, limit?: number },
+): Promise<number> {
+  const cutoff = input.now - (input.retentionSeconds ?? RESOLUTION_RETENTION_SECONDS)
+  const result = await db.prepare(
+    `DELETE FROM artifact_resolutions WHERE id IN (${PRUNE_CANDIDATES})`,
+  ).bind(cutoff, input.limit ?? RESOLUTION_PRUNE_BATCH).run()
+  return result.meta.changes ?? 0
+}
diff --git a/layers/artifact-delivery/server/utils/run-check-state.ts b/layers/artifact-delivery/server/utils/run-check-state.ts
index d77cb714..2de9457c 100644
--- a/layers/artifact-delivery/server/utils/run-check-state.ts
+++ b/layers/artifact-delivery/server/utils/run-check-state.ts
@@ -113,3 +113,36 @@ export function runCheckColumns(state: RunCheckState): RunCheckColumns {
       return { outcome: 'failing', tag: state.tag, detail: state.detail, retryable: 0, failing_since: state.since, failure_streak: state.streak, failed_at: state.failedAt }
   }
 }
+
+/** How long a settled check stands before the sweep checks that Skill again. */
+export interface RecheckAfterSeconds {
+  ready: number
+  failing: number
+}
+
+/**
+ * A ready Skill is checked weekly, a failing one daily. Each check writes a
+ * Resolution with its attestations, about 60 KB, so checking every Skill every
+ * hour filled the 10 GB database in November 2026.
+ */
+export const RECHECK_AFTER_SECONDS: RecheckAfterSeconds = {
+  ready: 7 * 24 * 60 * 60,
+  failing: 24 * 60 * 60,
+}
+
+/**
+ * Whether the sweep should check a Skill again now.
+ *
+ * An unchecked Skill and a transient failure, such as a spent quota, are due
+ * at once: neither says anything about the Skill yet.
+ */
+export function recheckDue(
+  state: RunCheckState,
+  settledAt: number | null,
+  now: number,
+  after: RecheckAfterSeconds,
+): boolean {
+  if (state._tag === 'unchecked' || state._tag === 'transient' || settledAt === null)
+    return true
+  return now - settledAt >= (state._tag === 'ready' ? after.ready : after.failing)
+}
diff --git a/layers/artifact-delivery/server/utils/run-sweep.ts b/layers/artifact-delivery/server/utils/run-sweep.ts
index 096cb87d..90371105 100644
--- a/layers/artifact-delivery/server/utils/run-sweep.ts
+++ b/layers/artifact-delivery/server/utils/run-sweep.ts
@@ -1,9 +1,9 @@
 import type { SourceRequest } from '../schemas/contracts'
 import type { ResolutionAccess } from './request-resolution'
-import type { RunCheckColumns } from './run-check-state'
+import type { RecheckAfterSeconds, RunCheckColumns } from './run-check-state'
 import type { CreateResolutionResult, ResolutionRow } from './state'
 import { z } from 'zod'
-import { nextRunCheckState, runCheckColumns, runCheckStateOf } from './run-check-state'
+import { nextRunCheckState, RECHECK_AFTER_SECONDS, recheckDue, runCheckColumns, runCheckStateOf } from './run-check-state'
 import { ACTIVE_BUILD_STATES, getResolution, parseCheckResults } from './state'
 
 /** One Skill whose page shows `skilld run OWNER/REPOSITORY/NAME`. */
@@ -33,6 +33,8 @@ export interface SkillRunSweepDependencies {
   now: () => number
   /** How many new checks one run starts. */
   batchSize: number
+  /** How long a settled check stands. Defaults to `RECHECK_AFTER_SECONDS`. */
+  recheckAfter?: RecheckAfterSeconds
 }
 
 export interface SkillRunSweepReport {
@@ -132,8 +134,14 @@ export async function runSkillRunSweep(dependencies: SkillRunSweepDependencies):
     return row !== undefined && runCheckStateOf(row)._tag === 'failing'
   }).length
 
+  const recheckAfter = dependencies.recheckAfter ?? RECHECK_AFTER_SECONDS
   const due = runnable
-    .filter(skill => !rows.get(skillKey(skill))?.pending_resolution_id)
+    .filter((skill) => {
+      const row = rows.get(skillKey(skill))
+      if (!row)
+        return true
+      return !row.pending_resolution_id && recheckDue(runCheckStateOf(row), row.settled_at, now, recheckAfter)
+    })
     .sort((left, right) =>
       (rows.get(skillKey(left))?.settled_at ?? 0) - (rows.get(skillKey(right))?.settled_at ?? 0)
       || compareText(skillKey(left), skillKey(right)))
diff --git a/test/unit/resolution-retention.test.ts b/test/unit/resolution-retention.test.ts
new file mode 100644
index 00000000..381db9c6
--- /dev/null
+++ b/test/unit/resolution-retention.test.ts
@@ -0,0 +1,93 @@
+// @vitest-environment node
+import type { SqliteD1 } from './helpers/d1-sqlite'
+import { afterEach, describe, expect, it } from 'vitest'
+import { pruneSettledResolutions, RESOLUTION_RETENTION_SECONDS } from '../../layers/artifact-delivery/server/utils/resolution-retention'
+import { allMigrations, createSqliteD1 } from './helpers/d1-sqlite'
+
+const NOW = 1_795_000_000
+const OLD = NOW - RESOLUTION_RETENTION_SECONDS - 60
+const ARTIFACT = `sha256:${'a'.repeat(64)}`
+
+let sqlite: SqliteD1
+
+afterEach(() => sqlite?.close())
+
+interface Seed {
+  id: string
+  at: number
+  state?: 'ready' | 'blocked' | 'failed' | 'fetching'
+  visibility?: 'public' | 'private'
+}
+
+function seed(rows: Seed[]) {
+  sqlite = createSqliteD1(allMigrations())
+  sqlite.raw.prepare(`INSERT INTO artifacts (id, content_sha256, content_bytes, format, r2_key)
+    VALUES (?, ?, 1024, 'skilld-tar-v1', 'v1/public/a.bin')`).run(ARTIFACT, 'a'.repeat(64))
+  for (const row of rows) {
+    const state = row.state ?? 'ready'
+    sqlite.raw.prepare(`INSERT INTO artifact_resolutions (
+        id, request_fingerprint, state, visibility, requested_owner, requested_repository,
+        selector_type, selector_value, artifact_id, attestation_json, created_at, updated_at)
+      VALUES (?, ?, ?, ?, 'acme', 'skills', 'named-skill', 'demo', ?, '{}', ?, ?)`).run(
+      row.id,
+      `fp-${row.id}`,
+      state,
+      row.visibility ?? 'public',
+      state === 'ready' ? ARTIFACT : null,
+      row.at,
+      row.at,
+    )
+    if (state === 'ready') {
+      sqlite.raw.prepare(`INSERT INTO artifact_attestations (resolution_id, artifact_id, attestation_json, created_at)
+        VALUES (?, ?, '{}', ?)`).run(row.id, ARTIFACT, row.at)
+    }
+  }
+}
+
+function remaining(): string[] {
+  return (sqlite.raw.prepare('SELECT id FROM artifact_resolutions ORDER BY id').all() as Array<{ id: string }>).map(row => row.id)
+}
+
+describe('pruneSettledResolutions', () => {
+  it('keeps the newest ready build of an Artifact and drops its older copies', async () => {
+    seed([
+      { id: 'r1', at: OLD - 20 },
+      { id: 'r2', at: OLD - 10 },
+      { id: 'r3', at: OLD },
+      { id: 'blocked', at: OLD, state: 'blocked' },
+    ])
+
+    expect(await pruneSettledResolutions(sqlite.db, { now: NOW })).toBe(3)
+
+    expect(remaining()).toEqual(['r3'])
+    expect(sqlite.raw.prepare('SELECT resolution_id FROM artifact_attestations').all()).toEqual([{ resolution_id: 'r3' }])
+  })
+
+  it('keeps recent, building, private, and run-checked Resolutions', async () => {
+    seed([
+      { id: 'checked', at: OLD - 30 },
+      { id: 'private', at: OLD - 20, state: 'failed', visibility: 'private' },
+      { id: 'building', at: OLD - 10, state: 'fetching' },
+      { id: 'recent-failure', at: NOW - 60, state: 'failed' },
+      { id: 'newest', at: NOW - 60 },
+    ])
+    sqlite.raw.prepare(`INSERT INTO artifact_run_checks (owner, repository, name, settled_resolution_id)
+      VALUES ('acme', 'skills', 'demo', 'checked')`).run()
+
+    expect(await pruneSettledResolutions(sqlite.db, { now: NOW })).toBe(0)
+
+    expect(remaining()).toEqual(['building', 'checked', 'newest', 'private', 'recent-failure'])
+  })
+
+  it('deletes at most one batch per call', async () => {
+    seed([
+      { id: 'f1', at: OLD, state: 'failed' },
+      { id: 'f2', at: OLD, state: 'failed' },
+      { id: 'f3', at: OLD, state: 'failed' },
+    ])
+
+    expect(await pruneSettledResolutions(sqlite.db, { now: NOW, limit: 2 })).toBe(2)
+    expect(await pruneSettledResolutions(sqlite.db, { now: NOW, limit: 2 })).toBe(1)
+    expect(remaining()).toEqual([])
+  })
+})
diff --git a/test/unit/skill-run-sweep.test.ts b/test/unit/skill-run-sweep.test.ts
index 4655bca8..ef250e3a 100644
--- a/test/unit/skill-run-sweep.test.ts
+++ b/test/unit/skill-run-sweep.test.ts
@@ -6,6 +6,7 @@ import { describe, expect, it, vi } from 'vitest'
 import { processArtifactBuild } from '../../layers/artifact-delivery/server/utils/build'
 import { requestResolution } from '../../layers/artifact-delivery/server/utils/request-resolution'
 import { loadRunCheckFlags } from '../../layers/artifact-delivery/server/utils/run-check-flags'
+import { RECHECK_AFTER_SECONDS } from '../../layers/artifact-delivery/server/utils/run-check-state'
 import { runSkillRunSweep } from '../../layers/artifact-delivery/server/utils/run-sweep'
 import { createSqliteD1 } from './helpers/d1-sqlite'
 
@@ -115,9 +116,29 @@ describe('skilld run sweep', () => {
     expect(harness.requested()).toEqual(['acme/busy/busy', 'tt-a1i/archify/archify'])
     harness.close()
   })
+
+  it('checks a failing Skill again only after a day, and a spent quota at once', async () => {
+    const harness = createHarness([archify, busy], 10, RECHECK_AFTER_SECONDS)
+
+    await runSkillRunSweep(harness.dependencies)
+    await harness.buildEach({
+      archify: { _tag: 'rejected', code: 'INVALID_SOURCE', summary: 'Too large.', findings: [] },
+      busy: { _tag: 'rejected', code: 'RATE_LIMITED', summary: 'Spent.', findings: [] },
+    })
+    const settled = await runSkillRunSweep(harness.dependencies)
+
+    expect(settled.settled).toBe(2)
+    expect(settled.started).toBe(1)
+    expect(harness.requested()).toEqual(['acme/busy/busy', 'tt-a1i/archify/archify', 'acme/busy/busy'])
+    harness.advance(RECHECK_AFTER_SECONDS.failing)
+    // Busy's pending check timed out over that day, so it is due again too.
+    expect((await runSkillRunSweep(harness.dependencies)).started).toBe(2)
+    expect(harness.requested().slice(-2)).toContain('tt-a1i/archify/archify')
+    harness.close()
+  })
 })
 
-function createHarness(skills: RunnableSkill[], batchSize = 10) {
+function createHarness(skills: RunnableSkill[], batchSize = 10, recheckAfter = { ready: 0, failing: 0 }) {
   const sqlite = createSqliteD1(MIGRATIONS)
   const enqueue = vi.fn(async (_resolutionId: string) => {})
   const requestedRefs: string[] = []
@@ -138,6 +159,7 @@ function createHarness(skills: RunnableSkill[], batchSize = 10) {
     newIdempotencyKey: () => `sweep-test-key-${String(++keys).padStart(4, '0')}`,
     now: () => clock,
     batchSize,
+    recheckAfter,
   }
 
   /** Run the queued builds, each rejected by GitHub as the test names. */
@@ -183,6 +205,7 @@ function createHarness(skills: RunnableSkill[], batchSize = 10) {
     enqueue,
     buildEach,
     requested: () => requestedRefs,
+    advance: (seconds: number) => { clock += seconds },
     close: () => sqlite.close(),
   }
 }