From 0effb01443067a43c54bcaa107663c0411c10f44 Mon Sep 17 00:00:00 2001
From: Garry Tan <garrytan@gmail.com>
Date: Sat, 25 Apr 2026 08:45:17 -0700
Subject: [PATCH] Remove Opus fanout overlay nudge

---
 CHANGELOG.md                        | 1 -
 model-overlays/opus-4-7.md          | 5 -----
 scripts/preflight-agent-sdk.ts      | 9 ++-------
 test/model-overlay-opus-4-7.test.ts | 3 +--
 4 files changed, 3 insertions(+), 15 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index f201dfaf..8b649c22 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,7 +19,6 @@ This release adds the reverse of `/codex`: external hosts can now ask Claude for
 
 - `hosts/claude.ts`: excludes the Claude outside-voice skill from Claude-host generation.
 - `test/brain-sync.test.ts`: the `GSTACK_HOME` isolation test now snapshots and preserves the real config file instead of assuming local machine state.
-- `model-overlays/opus-4-7.md`: restores the fanout nudge expected by the Opus overlay regression test.
 - `claude/SKILL.md.tmpl`: uses `mktemp` for diff capture in review/challenge mode instead of a `$$`-based temp path, avoiding collisions across concurrent invocations.
 
 ### Changed
diff --git a/model-overlays/opus-4-7.md b/model-overlays/opus-4-7.md
index 96650f1d..858b9a94 100644
--- a/model-overlays/opus-4-7.md
+++ b/model-overlays/opus-4-7.md
@@ -1,10 +1,5 @@
 {{INHERIT:claude}}
 
-**Fan out explicitly.** When independent file reads, searches, inspections,
-or verification steps can run in parallel, launch them in the same turn instead
-of serializing them. Keep the work bounded and avoid duplicate probes, but do
-not underuse parallel tool calls when the next step benefits from a wider view.
-
 **Effort-match the step.** Simple file reads, config checks, command lookups, and
 mechanical edits don't need deep reasoning. Complete them quickly and move on. Reserve
 extended thinking for genuinely hard subproblems: architectural tradeoffs, subtle bugs,
diff --git a/scripts/preflight-agent-sdk.ts b/scripts/preflight-agent-sdk.ts
index 9902306c..c437e5e4 100644
--- a/scripts/preflight-agent-sdk.ts
+++ b/scripts/preflight-agent-sdk.ts
@@ -7,7 +7,7 @@
  *   3. The SDK event stream contains the types we assume (system init, assistant,
  *      result) with the fields we destructure.
  *   4. `scripts/resolvers/model-overlay.ts` resolves `{{INHERIT:claude}}` against
- *      `opus-4-7.md` AND the resolved text contains the "Fan out explicitly" nudge.
+ *      `opus-4-7.md` with no unresolved inheritance directives.
  *   5. A local `claude` binary exists at `which claude` so binary pinning is possible.
  *
  * Run: bun run scripts/preflight-agent-sdk.ts
@@ -28,7 +28,7 @@ async function main() {
     failures.push(msg);
   };
 
-  // 1. Overlay resolver + fanout nudge text
+  // 1. Overlay resolver
   console.log('1. Overlay resolver');
   const resolved = readOverlay('opus-4-7');
   if (!resolved) {
@@ -40,11 +40,6 @@ async function main() {
     } else {
       pass('no unresolved INHERIT directives');
     }
-    if (!/Fan out explicitly/i.test(resolved)) {
-      fail('resolved overlay does not contain "Fan out explicitly" text');
-    } else {
-      pass('fanout nudge text present in resolved overlay');
-    }
   }
 
   // 2. Local claude binary exists
diff --git a/test/model-overlay-opus-4-7.test.ts b/test/model-overlay-opus-4-7.test.ts
index 0fe9f80e..678ba0d6 100644
--- a/test/model-overlay-opus-4-7.test.ts
+++ b/test/model-overlay-opus-4-7.test.ts
@@ -82,9 +82,8 @@ describe('Opus 4.7 overlay — pacing directive', () => {
     expect(out).toMatch(/user approval/i);
   });
 
-  test('resolved overlay keeps Fan out / Effort-match / Literal interpretation nudges', () => {
+  test('resolved overlay keeps Effort-match / Literal interpretation nudges', () => {
     const out = generateModelOverlay(makeCtx('opus-4-7'));
-    expect(out).toContain('Fan out explicitly');
     expect(out).toContain('Effort-match the step');
     expect(out).toContain('Literal interpretation awareness');
   });