diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index bbca4ee9fbc0..951003ceef7f 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -53,10 +53,13 @@ them into each workspace package. On supported macOS volumes, this also lets pnp
 reuse whole-package APFS clones instead of importing every file separately.
 
 Installation also prepares Kysely declarations from the SQL schemas in `src/state`.
-The generated files live in ignored `.artifacts/kysely/`; build, typecheck, and
-test entrypoints refresh them automatically, including after an install with
+The generated files live in ignored `.artifacts/kysely/`; build, typecheck,
+type-aware lint, and test entrypoints refresh them automatically, including after an install with
 `--ignore-scripts`. Unchanged inputs reuse the declarations without rewriting
 them. `pnpm db:kysely:check` checks schema projection and generator contracts.
+Sparse core, script, and root-test lint prepare only the available schemas and
+retire declarations for omitted schemas. Normal source generation, verification,
+and extension-boundary builds still require complete schemas.
 
 Give each source checkout its own physical dependency installation. Tooling does
 not automatically link a missing `node_modules` to another checkout. Existing
diff --git a/scripts/generate-kysely-types.mts b/scripts/generate-kysely-types.mts
index f43335b180e4..08060fa786ea 100644
--- a/scripts/generate-kysely-types.mts
+++ b/scripts/generate-kysely-types.mts
@@ -112,24 +112,42 @@ async function generateKyselyTypes(schemaSource: string): Promise<string> {
   }
 }
 
-export async function ensureKyselyTypes(cwd = REPO_ROOT, verify = false): Promise<void> {
-  // Packaged installs and dependency-only Docker stages have no source schemas.
-  if (
-    !verify &&
-    !SCHEMAS.some((name) => fs.existsSync(path.join(cwd, "src/state", `${name}-schema.sql`)))
-  ) {
-    return;
-  }
+export async function ensureKyselyTypes(
+  cwd = REPO_ROOT,
+  verify = false,
+  options: { allowPartialCheckout?: boolean } = {},
+): Promise<void> {
   const outputDir = path.join(cwd, ".artifacts/kysely");
   const stampFile = path.join(outputDir, "inputs.sha256");
-  const schemas = SCHEMAS.map((name) => ({
-    source: fs.readFileSync(path.join(cwd, "src/state", `${name}-schema.sql`), "utf8"),
+  const inputs = SCHEMAS.map((name) => ({
+    name,
+    input: path.join(cwd, "src/state", `${name}-schema.sql`),
     output: path.join(outputDir, `${name}-db.generated.ts`),
   }));
+  const available = inputs.filter((schema) => fs.existsSync(schema.input));
+  const partial = !verify && options.allowPartialCheckout === true;
+  if (partial) {
+    // Sparse lint must not consume a previous projection whose source is now omitted.
+    for (const schema of inputs.filter((input) => !available.includes(input))) {
+      fs.rmSync(schema.output, { force: true });
+    }
+  }
+  // Packaged installs and dependency-only Docker stages have no source schemas.
+  if (!verify && available.length === 0) {
+    if (partial) {
+      fs.rmSync(stampFile, { force: true });
+    }
+    return;
+  }
+  const schemas = (partial ? available : inputs).map((schema) => ({
+    name: schema.name,
+    source: fs.readFileSync(schema.input, "utf8"),
+    output: schema.output,
+  }));
   const fingerprint = () => {
     const hash = createHash("sha256").update(fs.readFileSync(fileURLToPath(import.meta.url)));
     for (const schema of schemas) {
-      hash.update(schema.source).update("\0");
+      hash.update(schema.name).update("\0").update(schema.source).update("\0");
       hash.update(fs.existsSync(schema.output) ? fs.readFileSync(schema.output) : "missing");
     }
     return hash.digest("hex");
diff --git a/scripts/run-oxlint-shards.mts b/scripts/run-oxlint-shards.mts
index 462d425fadaa..fbbfc9941fd6 100644
--- a/scripts/run-oxlint-shards.mts
+++ b/scripts/run-oxlint-shards.mts
@@ -401,7 +401,7 @@ export async function main(
         shouldPrepareOxlintArtifacts([...shard.args, ...shardArgs.oxlintArgs]),
       )
     ) {
-      await ensureKyselyTypes(process.cwd());
+      await ensureKyselyTypes(process.cwd(), false, { allowPartialCheckout: true });
     }
     if (needsArtifacts) {
       const code = await runManagedCommand({
diff --git a/scripts/run-oxlint.mts b/scripts/run-oxlint.mts
index a70ef9ce996c..64b95f90c3fa 100644
--- a/scripts/run-oxlint.mts
+++ b/scripts/run-oxlint.mts
@@ -669,7 +669,7 @@ export async function runOxlint(
   const run = async (ownedDirectory?: string) => {
     if (shouldPrepareOxlintArtifacts(argv) && env.OPENCLAW_OXLINT_SKIP_PREPARE !== "1") {
       // Source-backed core lint skips plugin declarations, not generated schema types.
-      await ensureKyselyTypes(process.cwd());
+      await ensureKyselyTypes(process.cwd(), false, { allowPartialCheckout: true });
     }
     if (needsArtifactPreparation) {
       // Declaration compilation owns its Go policy; lint limits belong to the oxlint child.
diff --git a/test/scripts/generate-kysely-types.test.ts b/test/scripts/generate-kysely-types.test.ts
index e37e19e75a02..7e0796d140e2 100644
--- a/test/scripts/generate-kysely-types.test.ts
+++ b/test/scripts/generate-kysely-types.test.ts
@@ -104,6 +104,30 @@ describe("Kysely declarations", () => {
     expect(missing.stderr).toContain("direct-run.mjs");
   });
 
+  it("retires omitted sparse projections and still requires complete generation", async () => {
+    const { root, schemas, output } = createSchemaFixture();
+    const agentOutput = path.join(root, ".artifacts/kysely/openclaw-agent-db.generated.ts");
+    await ensureKyselyTypes(root);
+    fs.unlinkSync(schemas[1]!);
+    await ensureKyselyTypes(root, false, { allowPartialCheckout: true });
+    expect(fs.readFileSync(output, "utf8")).toContain("export interface Records");
+    expect(fs.existsSync(agentOutput)).toBe(false);
+    await expect(ensureKyselyTypes(root)).rejects.toThrow("openclaw-agent-schema.sql");
+    await expect(ensureKyselyTypes(root, true, { allowPartialCheckout: true })).rejects.toThrow(
+      "openclaw-agent-schema.sql",
+    );
+    fs.writeFileSync(schemas[1]!, `${schema}\nALTER TABLE records ADD COLUMN restored TEXT;`);
+    await ensureKyselyTypes(root);
+    expect(fs.readFileSync(agentOutput, "utf8")).toContain("  restored: string | null;");
+    for (const source of schemas) {
+      fs.unlinkSync(source);
+    }
+    await ensureKyselyTypes(root, false, { allowPartialCheckout: true });
+    expect(fs.existsSync(output)).toBe(false);
+    expect(fs.existsSync(agentOutput)).toBe(false);
+    expect(fs.existsSync(path.join(root, ".artifacts/kysely/inputs.sha256"))).toBe(false);
+  });
+
   it("skips source-less installs but rejects an incomplete schema checkout", async () => {
     const root = tempDirs.make("kysely-source-less-");
     fs.mkdirSync(path.join(root, "src/state"), { recursive: true });
diff --git a/test/scripts/run-oxlint-kysely.test.ts b/test/scripts/run-oxlint-kysely.test.ts
index 0f06754554f0..c50e795ce813 100644
--- a/test/scripts/run-oxlint-kysely.test.ts
+++ b/test/scripts/run-oxlint-kysely.test.ts
@@ -99,18 +99,29 @@ const striped = [
 
 describe("typed lint Kysely prerequisites", () => {
   it.each([
-    { name: "direct", args: direct },
-    { name: "striped", args: striped },
-  ])("prepares cold declarations before $name core lint without plugin artifacts", ({ args }) => {
-    const fixture = createLintFixture();
-    expect(fs.existsSync(fixture.output)).toBe(false);
-    const result = fixture.run(args);
-    expect(result.status, result.stdout + result.stderr).toBe(0);
-    expect(fs.readFileSync(fixture.output, "utf8")).toContain("title: string;");
-    expect(fs.existsSync(path.join(fixture.root, ".artifacts/extension-package-boundary"))).toBe(
-      false,
-    );
-  });
+    { name: "direct", args: direct, sparse: false },
+    { name: "striped", args: striped, sparse: false },
+    { name: "sparse direct", args: direct, sparse: true },
+    { name: "sparse striped", args: striped, sparse: true },
+  ])(
+    "prepares cold declarations before $name core lint without plugin artifacts",
+    ({ args, sparse }) => {
+      const fixture = createLintFixture();
+      const agentProjection = ".artifacts/kysely/openclaw-agent-db.generated.ts";
+      if (sparse) {
+        fs.unlinkSync(path.join(fixture.root, "src/state/openclaw-agent-schema.sql"));
+        fixture.write(agentProjection, "export interface Stale {}\n");
+      }
+      expect(fs.existsSync(fixture.output)).toBe(false);
+      const result = fixture.run(args);
+      expect(result.status, result.stdout + result.stderr).toBe(0);
+      expect(fs.readFileSync(fixture.output, "utf8")).toContain("title: string;");
+      expect(fs.existsSync(path.join(fixture.root, agentProjection))).toBe(!sparse);
+      expect(fs.existsSync(path.join(fixture.root, ".artifacts/extension-package-boundary"))).toBe(
+        false,
+      );
+    },
+  );
 
   it.each([
     { name: "direct", args: direct },