diff --git a/CHANGELOG.md b/CHANGELOG.md
index a24cee4f..51055bbb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## 0.133.8
+
+- Stop an external supervisor's active harness after `submit_result` accepts a result or `stop` declares completion.
+- Custom `DriveHarness` implementations should honor the new `stopSignal` so they stop provider work after completion.
+
 ## 0.133.7
 
 - Preserve cli-bridge profile materialization receipts when a terminal provider error follows the receipt.
diff --git a/docs/api/primitive-catalog.md b/docs/api/primitive-catalog.md
index 39106140..dac06aec 100644
--- a/docs/api/primitive-catalog.md
+++ b/docs/api/primitive-catalog.md
@@ -7,7 +7,7 @@
 
 # Primitive catalog — the never-stale anti-reinvention inventory
 
-> **GENERATED** from `@tangle-network/agent-runtime@0.133.7` and `@tangle-network/agent-eval@0.145.2` by `scripts/gen-primitive-catalog.mjs`. Do NOT hand-edit — run `pnpm run docs:api`. This is the mechanical companion to the JUDGMENT in `canonical-api.md` (§2 decision table + §1.5 AgentProfile law): that doc says WHICH primitive to reach for and what NOT to build; this catalog proves WHAT exists. Per-symbol signatures + `file:line` live in the per-module pages under `docs/api/`.
+> **GENERATED** from `@tangle-network/agent-runtime@0.133.8` and `@tangle-network/agent-eval@0.145.2` by `scripts/gen-primitive-catalog.mjs`. Do NOT hand-edit — run `pnpm run docs:api`. This is the mechanical companion to the JUDGMENT in `canonical-api.md` (§2 decision table + §1.5 AgentProfile law): that doc says WHICH primitive to reach for and what NOT to build; this catalog proves WHAT exists. Per-symbol signatures + `file:line` live in the per-module pages under `docs/api/`.
 
 ## 1. agent-runtime — own public surface
 
diff --git a/docs/canonical-api.md b/docs/canonical-api.md
index bb8f7efd..2624322a 100644
--- a/docs/canonical-api.md
+++ b/docs/canonical-api.md
@@ -4,7 +4,7 @@
 Generated signatures and the complete export list live in docs/api/.
 Run pnpm docs:freshness after editing this file. -->
 
-> **Version 0.133.7.**
+> **Version 0.133.8.**
 > [`docs/api/primitive-catalog.md`](./api/primitive-catalog.md) lists every export and import path.
 > `agent-eval` must satisfy `>=0.145.2 <0.146.0`.
 > `sandbox` must satisfy `>=0.21.1 <0.22.0`.
diff --git a/package.json b/package.json
index b73f01fa..08f131b8 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tangle-network/agent-runtime",
-  "version": "0.133.7",
+  "version": "0.133.8",
   "description": "Shared task-lifecycle skeleton for agents: a recursive loop kernel for chat turns, one-shot tasks, and multi-attempt loops, with trace capture and eval-gated self-improvement. Domain behavior lives in adapters; scoring and ship-gates in @tangle-network/agent-eval.",
   "homepage": "https://github.com/tangle-network/agent-runtime#readme",
   "repository": {
diff --git a/src/testing/fixtures/agent-improvement-proposal.json b/src/testing/fixtures/agent-improvement-proposal.json
index 476af5c4..28c1812a 100644
--- a/src/testing/fixtures/agent-improvement-proposal.json
+++ b/src/testing/fixtures/agent-improvement-proposal.json
@@ -1,6 +1,6 @@
 {
   "changedSurfaces": ["prompt"],
-  "digest": "sha256:dd3e1c5770a5e309e1bcf627988f8a929f48cb9579239c27be3e0e8ea0928c0b",
+  "digest": "sha256:b796270b8c13a4da5c1b15a64760b2b0426b5caa9c4309c8f6cdbee2c81d9c7e",
   "evaluation": {
     "decision": {
       "contributingChecks": [
@@ -4870,7 +4870,7 @@
     ],
     "metadata": {
       "fixture": "agent-improvement-proposal",
-      "runtimeVersion": "0.133.7"
+      "runtimeVersion": "0.133.8"
     },
     "objectives": [
       {
@@ -4981,8 +4981,8 @@
       "baselineContentHash": "sha256:5c21ee53e513fc604cb09754e21c392b24a424da0ef37dbf8f1ee4a8a0b08f09",
       "candidateContentHash": "sha256:60fcbb1c728194bd51d7d19cb732d1c3f1881dce7e0a6266b41c8b98cfd65693",
       "kind": "agent-eval-loop",
-      "recordDigest": "sha256:d9a7fed49f117de78530dd56e4f03c34b3ce08e017bf5c6f7812c93d97297492",
-      "runId": "agent-runtime-0.133.7-proposal-fixture",
+      "recordDigest": "sha256:cc78d293ce5c65a8a5cd34fd2a919ae76079325b2001e6204b76a3fe25c7afab",
+      "runId": "agent-runtime-0.133.8-proposal-fixture",
       "schema": "agent-candidate-experiment"
     }
   },
@@ -5009,5 +5009,5 @@
   ],
   "kind": "agent-improvement-proposal",
   "proposedAt": "2026-07-10T01:00:00.000Z",
-  "runId": "agent-runtime-0.133.7-proposal-fixture"
+  "runId": "agent-runtime-0.133.8-proposal-fixture"
 }
diff --git a/src/testing/fixtures/agent-profile-improvement-proposal.json b/src/testing/fixtures/agent-profile-improvement-proposal.json
index a2507e4f..60869db2 100644
--- a/src/testing/fixtures/agent-profile-improvement-proposal.json
+++ b/src/testing/fixtures/agent-profile-improvement-proposal.json
@@ -1,6 +1,6 @@
 {
   "changedSurfaces": ["prompt", "skills"],
-  "digest": "sha256:21dd7d12cf6f1a8c4ac099d8ae2788f0c9dce09be5608134c6bccd4ab1b6db95",
+  "digest": "sha256:e671ef99f3db6a5e8e815243648547e0a3f98603149dc1c87102c5408bbed764",
   "evaluation": {
     "decision": {
       "contributingChecks": [
@@ -1715,7 +1715,7 @@
     ],
     "metadata": {
       "fixture": "agent-profile-improvement-proposal",
-      "runtimeVersion": "0.133.7"
+      "runtimeVersion": "0.133.8"
     },
     "objectives": [
       {
@@ -1826,7 +1826,7 @@
       "baselineContentHash": "sha256:21c495a37c418c10bde64fbaa188beddeed31f1f051ea60a6a6582a9ee0db704",
       "candidateContentHash": "sha256:103f77bc8481601eef1ad5fe6ba84a40dffabc3a44f421f8c8559121edab84e9",
       "kind": "agent-eval-loop",
-      "recordDigest": "sha256:620281149e673aa97c02fe7ebc5d1795786e1d06b74e17dfce5bcd89d31fe017",
+      "recordDigest": "sha256:fe30eea10ae7d824d1f107ece0537a4fa27f51da1303fddab33cc293c85ceac3",
       "runId": "profile-improvement-1",
       "schema": "agent-profile-improvement-experiment"
     }