Q19: pack the skills most relevant to the task first

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/main/services/skill-relevance.ts

@@ -0,0 +1,25 @@
+const LATIN_WORD = /[a-z0-9]{3,}/g;
+const CJK_RUN = /[\u3400-\u9fff]+/g;
+
+/** Words (latin, 3+ chars) and character pairs (CJK) of a text. */
+function terms(text: string): Set<string> {
+  const lower = text.toLowerCase();
+  const found = new Set(lower.match(LATIN_WORD) ?? []);
+  for (const run of lower.match(CJK_RUN) ?? []) {
+    for (let index = 0; index < run.length - 1; index += 1) found.add(run.slice(index, index + 2));
+  }
+  return found;
+}
+
+/** Orders items by how many terms they share with the task; ties keep their order. */
+export function orderByRelevance<T>(items: T[], describe: (item: T) => string, taskText: string): T[] {
+  const taskTerms = terms(taskText);
+  return items
+    .map((item, index) => {
+      let score = 0;
+      for (const term of terms(describe(item))) if (taskTerms.has(term)) score += 1;
+      return { item, index, score };
+    })
+    .sort((a, b) => b.score - a.score || a.index - b.index)
+    .map((entry) => entry.item);
+}

src/main/services/skill-service.ts

@@ -1,7 +1,4 @@
-import { estimateTokens } from "./context-budget";
 import { existsSync, readFileSync } from "node:fs";
-import { createHash } from "node:crypto";
-import { normalize } from "node:path";
 import type { DatabaseSync } from "node:sqlite";
 import type { BindSkillInput, ImportSkillDirectoryInput, ResolveAgentSkillsInput, RunSkillTestsInput } from "../../shared/commands";
 import { SLO_SIGNAL_KEY } from "../../shared/domain";
@@ -10,6 +7,9 @@ import { AuditService } from "./audit-service";
 import { OperationsService } from "./operations-service";
 import { copySkillRevision, recursiveSkillChecksum } from "./skill-artifacts";
 import { loadSkillManifest, type SkillManifest } from "./skill-manifest";
+import { orderByRelevance } from "./skill-relevance";
+import { runManifestArtifactTest, verifyRevisionStructure, type SkillArtifactRow, type SkillTestRow } from "./skill-tests";
+import { estimateTokens } from "./context-budget";
 
 function slugify(value: string): string {
   return value.trim().toLowerCase().replace(/[^a-z0-9]+/g, "-").replace(/^-|-$/g, "");
@@ -236,7 +236,7 @@ export class SkillService {
   /**
    * Freezes the exact skill set this run carries: forced house-style skills
    * first (identical for everyone, CEO included), then the agent's enabled
-   * bindings in priority order, deduplicated per skill. Skills pack whole
+   * bindings, most relevant to the task first, deduplicated per skill. Skills pack whole
    * until input.maxTokens; whatever does not fit is named in the compiled
    * prompt instead of silently overflowing the model's context.
    */
@@ -263,7 +263,11 @@ export class SkillService {
     `).all(input.orgId, input.agentId) as unknown as RuntimeSkillRow[];
     const rows: RuntimeSkillRow[] = [];
     const seenSkillIds = new Set<string>();
-    for (const row of [...forcedRows, ...boundRows]) {
+    const relevantBound = orderByRelevance(boundRows, (row) => {
+      const manifest = JSON.parse(row.manifest_json) as SkillManifest;
+      return `${manifest.name} ${manifest.description ?? ""}`;
+    }, input.taskText);
+    for (const row of [...forcedRows, ...relevantBound]) {
       if (seenSkillIds.has(row.skill_id)) continue;
       seenSkillIds.add(row.skill_id);
       rows.push(row);
@@ -414,97 +418,3 @@ interface SkillRevisionTestRow {
   version_semver: string;
   slug: string;
 }
-
-interface SkillTestRow {
-  id: string;
-  test_type: string;
-  expected_output_ref: string;
-}
-
-interface SkillArtifactRow {
-  artifact_type: string;
-  object_key: string;
-  sha256: string;
-  size_bytes: number;
-}
-
-interface SkillTestResult {
-  status: "passed" | "failed";
-  testType: string;
-  expectedOutputRef: string;
-  checks: Array<{ name: string; status: "passed" | "failed"; detail: string }>;
-  artifactSha256?: string;
-  failure?: string;
-}
-
-function verifyRevisionStructure(artifacts: SkillArtifactRow[]): SkillTestResult | null {
-  const requiredTypes = ["manifest", "entrypoint"];
-  for (const type of requiredTypes) {
-    if (!artifacts.some((artifact) => artifact.artifact_type === type)) {
-      return failedSkillTest("revision_structure", type, `Skill revision artifact is missing: ${type}`);
-    }
-  }
-  for (const artifact of artifacts) {
-    try {
-      verifyArtifactIntegrity(artifact);
-    } catch (error) {
-      return failedSkillTest("artifact_integrity", artifact.object_key, error instanceof Error ? error.message : String(error));
-    }
-  }
-  return null;
-}
-
-function runManifestArtifactTest(test: SkillTestRow, artifacts: SkillArtifactRow[]): SkillTestResult {
-  if (test.test_type !== "manifest") {
-    return failedSkillTest(test.test_type, test.expected_output_ref, `Unsupported skill test type: ${test.test_type}`);
-  }
-  const testArtifact = artifacts.find((artifact) => (
-    artifact.artifact_type === "test" && artifactMatchesExpectedRef(artifact.object_key, test.expected_output_ref)
-  ));
-  if (!testArtifact) return failedSkillTest(test.test_type, test.expected_output_ref, "Skill test artifact was not found.");
-
-  try {
-    const content = verifyArtifactIntegrity(testArtifact).toString("utf8");
-    if (!content.trim()) throw new Error("Skill test artifact is empty.");
-    return {
-      status: "passed",
-      testType: test.test_type,
-      expectedOutputRef: test.expected_output_ref,
-      artifactSha256: testArtifact.sha256,
-      checks: [
-        { name: "manifest_test_artifact", status: "passed", detail: "Artifact exists, checksum matches, and content is non-empty." },
-      ],
-    };
-  } catch (error) {
-    return failedSkillTest(test.test_type, test.expected_output_ref, error instanceof Error ? error.message : String(error));
-  }
-}
-
-function verifyArtifactIntegrity(artifact: SkillArtifactRow): Buffer {
-  if (!existsSync(artifact.object_key)) throw new Error(`Skill artifact is missing: ${artifact.object_key}`);
-  const body = readFileSync(artifact.object_key);
-  const sha256 = createHash("sha256").update(body).digest("hex");
-  if (sha256 !== artifact.sha256) throw new Error(`Skill artifact checksum mismatch: ${artifact.object_key}`);
-  if (body.byteLength !== artifact.size_bytes) throw new Error(`Skill artifact size mismatch: ${artifact.object_key}`);
-  return body;
-}
-
-function artifactMatchesExpectedRef(objectKey: string, expectedRef: string): boolean {
-  const expected = normalizeSkillPath(expectedRef);
-  const actual = normalizeSkillPath(objectKey);
-  return actual === expected || actual.endsWith(`/${expected}`);
-}
-
-function normalizeSkillPath(value: string): string {
-  return normalize(value).replaceAll("\\", "/");
-}
-
-function failedSkillTest(testType: string, expectedOutputRef: string, failure: string): SkillTestResult {
-  return {
-    status: "failed",
-    testType,
-    expectedOutputRef,
-    checks: [{ name: "skill_test", status: "failed", detail: failure }],
-    failure,
-  };
-}

src/main/services/skill-tests.ts

@@ -0,0 +1,97 @@
+import { createHash } from "node:crypto";
+import { existsSync, readFileSync } from "node:fs";
+import { normalize } from "node:path";
+
+export interface SkillTestRow {
+  id: string;
+  test_type: string;
+  expected_output_ref: string;
+}
+
+export interface SkillArtifactRow {
+  artifact_type: string;
+  object_key: string;
+  sha256: string;
+  size_bytes: number;
+}
+
+export interface SkillTestResult {
+  status: "passed" | "failed";
+  testType: string;
+  expectedOutputRef: string;
+  checks: Array<{ name: string; status: "passed" | "failed"; detail: string }>;
+  artifactSha256?: string;
+  failure?: string;
+}
+
+export function verifyRevisionStructure(artifacts: SkillArtifactRow[]): SkillTestResult | null {
+  const requiredTypes = ["manifest", "entrypoint"];
+  for (const type of requiredTypes) {
+    if (!artifacts.some((artifact) => artifact.artifact_type === type)) {
+      return failedSkillTest("revision_structure", type, `Skill revision artifact is missing: ${type}`);
+    }
+  }
+  for (const artifact of artifacts) {
+    try {
+      verifyArtifactIntegrity(artifact);
+    } catch (error) {
+      return failedSkillTest("artifact_integrity", artifact.object_key, error instanceof Error ? error.message : String(error));
+    }
+  }
+  return null;
+}
+
+export function runManifestArtifactTest(test: SkillTestRow, artifacts: SkillArtifactRow[]): SkillTestResult {
+  if (test.test_type !== "manifest") {
+    return failedSkillTest(test.test_type, test.expected_output_ref, `Unsupported skill test type: ${test.test_type}`);
+  }
+  const testArtifact = artifacts.find((artifact) => (
+    artifact.artifact_type === "test" && artifactMatchesExpectedRef(artifact.object_key, test.expected_output_ref)
+  ));
+  if (!testArtifact) return failedSkillTest(test.test_type, test.expected_output_ref, "Skill test artifact was not found.");
+
+  try {
+    const content = verifyArtifactIntegrity(testArtifact).toString("utf8");
+    if (!content.trim()) throw new Error("Skill test artifact is empty.");
+    return {
+      status: "passed",
+      testType: test.test_type,
+      expectedOutputRef: test.expected_output_ref,
+      artifactSha256: testArtifact.sha256,
+      checks: [
+        { name: "manifest_test_artifact", status: "passed", detail: "Artifact exists, checksum matches, and content is non-empty." },
+      ],
+    };
+  } catch (error) {
+    return failedSkillTest(test.test_type, test.expected_output_ref, error instanceof Error ? error.message : String(error));
+  }
+}
+
+function verifyArtifactIntegrity(artifact: SkillArtifactRow): Buffer {
+  if (!existsSync(artifact.object_key)) throw new Error(`Skill artifact is missing: ${artifact.object_key}`);
+  const body = readFileSync(artifact.object_key);
+  const sha256 = createHash("sha256").update(body).digest("hex");
+  if (sha256 !== artifact.sha256) throw new Error(`Skill artifact checksum mismatch: ${artifact.object_key}`);
+  if (body.byteLength !== artifact.size_bytes) throw new Error(`Skill artifact size mismatch: ${artifact.object_key}`);
+  return body;
+}
+
+function artifactMatchesExpectedRef(objectKey: string, expectedRef: string): boolean {
+  const expected = normalizeSkillPath(expectedRef);
+  const actual = normalizeSkillPath(objectKey);
+  return actual === expected || actual.endsWith(`/${expected}`);
+}
+
+function normalizeSkillPath(value: string): string {
+  return normalize(value).replaceAll("\\", "/");
+}
+
+function failedSkillTest(testType: string, expectedOutputRef: string, failure: string): SkillTestResult {
+  return {
+    status: "failed",
+    testType,
+    expectedOutputRef,
+    checks: [{ name: "skill_test", status: "failed", detail: failure }],
+    failure,
+  };
+}

src/main/services/task-execution-service.ts

@@ -156,7 +156,7 @@ export class TaskExecutionService {
     let providerRequestId: string | null = null;
     let skillRuntimeSnapshot: SkillRuntimeSnapshotRow | null = null;
     try {
-      skillRuntimeSnapshot = this.resolveSkillRuntimeSnapshot(orgId, agent.id, runId, skillBudgetTokens(provider.context_window_tokens));
+      skillRuntimeSnapshot = this.resolveSkillRuntimeSnapshot(orgId, agent.id, runId, skillBudgetTokens(provider.context_window_tokens), `${task.title}\n${task.description}`);
       // Watermark for reply delivery and mid-run message polling.
       const runStartedAt = new Date().toISOString();
       const chatContext = loadChatWakeContext(this.db, orgId, agent.id, isolation.secretScopeJson);
@@ -616,9 +616,9 @@ export class TaskExecutionService {
     `).run(TASK_RUN_STATE.FAILED, providerRequestId, new Date().toISOString(), errorMessage, runId, orgId);
   }
 
-  private resolveSkillRuntimeSnapshot(orgId: string, agentId: string, runId: string, maxTokens: number): SkillRuntimeSnapshotRow | null {
+  private resolveSkillRuntimeSnapshot(orgId: string, agentId: string, runId: string, maxTokens: number, taskText: string): SkillRuntimeSnapshotRow | null {
     if (!this.skills.hasRuntimeSkills(orgId, agentId)) return null;
-    const snapshotId = this.skills.resolveRuntimeSnapshot({ orgId, agentId, runId, maxTokens });
+    const snapshotId = this.skills.resolveRuntimeSnapshot({ orgId, agentId, runId, maxTokens, taskText });
     const snapshot = this.db.prepare(`
       select id, compiled_prompt, tools_manifest, source_revision_ids
       from skill_runtime_snapshots

src/shared/commands/skills.ts

@@ -21,6 +21,8 @@ export interface ResolveAgentSkillsInput {
   runId: string;
   /** Token budget for the compiled skills. */
   maxTokens: number;
+  /** Task title and description, to rank bound skills by relevance. */
+  taskText: string;
 }
 
 export interface RunSkillTestsInput {