diff --git a/src/agents/athena/constants.ts b/src/agents/athena/constants.ts
index e65d6324a..c304e4e2a 100644
--- a/src/agents/athena/constants.ts
+++ b/src/agents/athena/constants.ts
@@ -3,5 +3,5 @@ export const COUNCIL_DEFAULTS = {
   BACKGROUND_WAIT_TIMEOUT_MS: 30000,
   STUCK_THRESHOLD_SECONDS: 120,
   MEMBER_MAX_RUNNING_SECONDS: 1800,
-  ARCHIVE_ID_BYTES: 2,
+  ARCHIVE_ID_BYTES: 8,
 } as const
diff --git a/src/tools/council-archive/council-flow.integration.test.ts b/src/tools/council-archive/council-flow.integration.test.ts
index 9700165fc..da5d70c57 100644
--- a/src/tools/council-archive/council-flow.integration.test.ts
+++ b/src/tools/council-archive/council-flow.integration.test.ts
@@ -117,7 +117,7 @@ describe("council archive integration flow", () => {
         )
         const result: CouncilFinalizeResult = JSON.parse(extractJson(resultStr))
 
-        expect(result.archive_dir).toMatch(/\.sisyphus\/athena\/council-test-[a-f0-9]{4}$/)
+        expect(result.archive_dir).toMatch(/\.sisyphus\/athena\/council-test-[a-f0-9]{16}$/)
         expect(result.meta_file).toMatch(/meta\.yaml$/)
         expect(result.members).toHaveLength(3)
 
diff --git a/src/tools/council-archive/create-council-finalize.test.ts b/src/tools/council-archive/create-council-finalize.test.ts
index bade4ec9a..9574bc596 100644
--- a/src/tools/council-archive/create-council-finalize.test.ts
+++ b/src/tools/council-archive/create-council-finalize.test.ts
@@ -73,8 +73,8 @@ describe("createCouncilFinalize", () => {
       )
       const result: CouncilFinalizeResult = JSON.parse(extractJson(resultStr))
 
-      expect(result.archive_dir).toMatch(/\.sisyphus\/athena\/council-test-[a-f0-9]{4}$/)
-      expect(result.meta_file).toMatch(/\.sisyphus\/athena\/council-test-[a-f0-9]{4}\/meta\.yaml$/)
+      expect(result.archive_dir).toMatch(/\.sisyphus\/athena\/council-test-[a-f0-9]{16}$/)
+      expect(result.meta_file).toMatch(/\.sisyphus\/athena\/council-test-[a-f0-9]{16}\/meta\.yaml$/)
       expect(result.members).toHaveLength(3)
 
       for (let i = 0; i < agents.length; i++) {
@@ -517,7 +517,7 @@ describe("createCouncilFinalize", () => {
       )
       const result: CouncilFinalizeResult = JSON.parse(extractJson(resultStr))
 
-      expect(result.archive_dir).toMatch(/^\.sisyphus\/athena\/council-unnamed-[a-f0-9]{4}$/)
+      expect(result.archive_dir).toMatch(/^\.sisyphus\/athena\/council-unnamed-[a-f0-9]{16}$/)
     })
   })
 })
diff --git a/src/tools/council-archive/create-council-finalize.ts b/src/tools/council-archive/create-council-finalize.ts
index cb1a7a5f4..23b1baa88 100644
--- a/src/tools/council-archive/create-council-finalize.ts
+++ b/src/tools/council-archive/create-council-finalize.ts
@@ -13,9 +13,6 @@ import {
 } from "../../agents/athena"
 import type { CouncilFinalizeArgs, CouncilMemberResult, CouncilFinalizeResult } from "./types"
 
-type CouncilFinalizeToolContext = {
-  sessionID?: string
-}
 export function createCouncilFinalize(
   basePath?: string,
 ): ToolDefinition {
@@ -34,7 +31,7 @@ export function createCouncilFinalize(
       question: tool.schema.string().optional().describe("Original user question that triggered the council"),
       prompt_file: tool.schema.string().optional().describe("Path to the council prompt temp file (will be moved into the archive)"),
     },
-    async execute(args: CouncilFinalizeArgs, toolContext: CouncilFinalizeToolContext) {
+    async execute(args: CouncilFinalizeArgs, toolContext) {
       const resolvedIntent = resolveCouncilIntent(args.intent)
       if (!resolvedIntent) {
         return `Invalid intent: "${args.intent}". Valid intents: ${getValidCouncilIntents().join(", ")}.`